246,070 results on '"Casey AT"'
Search Results
2. Community paramedicine program and outcomes of referred coronary artery bypass grafting patients
- Author
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Washist, Regan, Smith, Casey, and Kientopf, Tyler
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- 2024
3. Simulated GP clinic closure: Effects on patient access in the Irish mid-west
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Harbour, Eric, Stanley, Fintan, Casey, Monica, O'Callaghan, Michael E, and Glynn, Liam G
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- 2024
4. Tracing the galaxy-halo connection with galaxy clustering in COSMOS-Web from z = 0.1 to z ~ 12
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Paquereau, Louise, Laigle, Clotilde, McCracken, Henry Joy, Shuntov, Marko, Ilbert, Olivier, Akins, Hollis B., Allen, Natalie, Togo, Rafael Arango, Berman, Eddie M., Bethermin, Matthieu, Casey, Caitlin M., McCleary, Jacqueline, Dubois, Yohan, Drakos, Nicole E., Faisst, Andreas L., Franco, Maximilien, Harish, Santosh, Jespersen, Christian K., Kartaltepe, Jeyhan S., Koekemoer, Anton M., Kokorev, Vasily, Lambrides, Erini, Larson, Rebecca, Liu, Daizhong, Borgne, Damien Le, Lewis, Joseph S. W., McKinney, Jed, Mercier, Wilfried, Rhodes, Jason D., Robertson, Brant E., Toft, Sune, Trebitsch, Maxime, Tresse, Laurence, and Weaver, John R.
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Astrophysics - Astrophysics of Galaxies - Abstract
We explore the evolving relationship between galaxies and their dark matter halos from $z \sim 0.1$ to $z \sim 12$ using mass-limited angular clustering measurements in the 0.54 deg$^2$ of the COSMOS-Web survey. This study provides the first measurements of the mass-limited two-point correlation function at $z \ge 10$ and a consistent analysis spanning 13.4 Gyr of cosmic history, setting new benchmarks for future simulations and models. Using a halo occupation distribution (HOD) framework, we derive characteristic halo masses and the stellar-to-halo mass relationship (SHMR) across redshifts and stellar mass bins. Our results first indicate that HOD models fit data at $z \ge 2.5$ best when incorporating a non-linear scale-dependent halo bias, boosting clustering at non-linear scales (r = 10-100 kpc). We find that galaxies at z > 10.5 with $\log(M_\star / M_\odot) \ge 8.85$ are hosted by halos with $M_{\rm h} \sim 10^{10.5}\,M_\odot$, achieving a star formation efficiency (SFE) $M_\star / (f_b M_{\rm h}) $ up to 1 dex higher than at $z \le 1$. The high galaxy bias at $z \ge 8$ suggests that these galaxies reside in massive halos with intrinsic high SFE. Our SHMR evolves significantly with redshift, starting high at $z \ge 10.5$, decreasing until $z \sim 2 - 3$, then increasing again until the present. Current simulations fail to reproduce both massive high-$z$ galaxies and this evolution, while semi-empirical models linking SFE to halo mass, accretion rates, and redshift align with our findings. We propose that $z > 8$ galaxies experience bursty star formation without significant feedback altering their growth, driving the rapid growth of massive galaxies observed by JWST. Over time, increasing feedback efficiency and exponential halo growth suppress star formation. At $z \sim 2 - 3$ and after, halo growth slows down while star formation continues, supported by gas reservoirs in halos., Comment: Submitted to Astronomy & Astrophysics
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- 2025
5. Incorporating stochastic gene expression, signaling-mediated intercellular interactions, and regulated cell proliferation in models of coordinated tissue development
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Barkan, Casey O. and Chou, Tom
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Quantitative Biology - Cell Behavior ,Quantitative Biology - Molecular Networks ,Quantitative Biology - Tissues and Organs - Abstract
Formulating quantitative and predictive models for tissue development requires consideration of the complex, stochastic gene expression dynamics, its regulation via cell-to-cell interactions, and cell proliferation. Including all of these processes into a practical mathematical framework requires complex expressions that are difficult to interpret and apply. We construct a simple theory that incorporates intracellular stochastic gene expression dynamics, signaling chemicals that influence these dynamics and mediate cell-cell interactions, and cell proliferation and its accompanying differentiation. Cellular states (genetic and epigenetic) are described by a Waddington vector field that allows for non-gradient dynamics (cycles, entropy production, loss of detailed balance) which is precluded in Waddington potential landscape representations of gene expression dynamics. We define an epigenetic fitness landscape that describes the proliferation of different cell types, and elucidate how this fitness landscape is related to Waddington's vector field. We illustrate the applicability of our framework by analyzing two model systems: an interacting two-gene differentiation process and a spatiotemporal organism model inspired by planaria., Comment: 14 pages, 5 figures
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- 2025
6. The COSMOS-Web deep galaxy group catalog up to $z=3.7$
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Toni, Greta, Gozaliasl, Ghassem, Maturi, Matteo, Moscardini, Lauro, Finoguenov, Alexis, Castignani, Gianluca, Gentile, Fabrizio, Virolainen, Kaija, Casey, Caitlin M., Kartaltepe, Jeyhan S., Akins, Hollis B., Allen, Natalie, Arango-Toro, Rafael C., Babul, Arif, Brinch, Malte, Drakos, Nicole E., Faisst, Andreas L., Franco, Maximilien, Griffiths, Richard E., Harish, Santosh, Hasinger, Günther, Ilbert, Olivier, Jin, Shuowen, Khostovan, Ali Ahmad, Koekemoer, Anton M., Korpi-Lagg, Maarit, Larson, Rebecca L., Lertprasertpong, Jitrapon, Liu, Daizhong, Magdis, Georgios, Massey, Richard, McCracken, Henry J., McKinney, Jed, Paquereau, Louise, Rhodes, Jason, Robertson, Brant E., Sargent, Mark, Shuntov, Marko, Tanaka, Masayuki, Taamoli, Sina, Tempel, Elmo, Toft, Sune, Vardoulaki, Eleni, and Yang, Lilan
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Astrophysics - Astrophysics of Galaxies ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
Galaxy groups with $M_{tot} \lesssim 10^{14}$ $M_\odot$ and up to a few tens of members are the most common galaxy environment, marking the transition between field and massive clusters. Identifying groups plays a crucial role in understanding structure formation and galaxy evolution. Modern deep surveys allow us to build well-characterized samples of groups up to the regime where structures were taking shape. We aimed to build the largest deep catalog of galaxy groups to date over the COSMOS-Web field effective area of 0.45 deg$^2$, leveraging the deep high quality data of the new COSMOS-Web photometric catalog resulted from the James Webb Space Telescope observations of the COSMOS-Web field. We performed the group search with the AMICO algorithm, a linear matched filter based on an analytical model for the group signal. AMICO has already been tested in wide and deep field surveys, including COSMOS data up to $z=2$. In this work, we tested the algorithm performances at even higher redshift and searched for protocluster cores at $z>2$. We compiled a list of known protoclusters in COSMOS at $2 \leq z \leq 3.7$, matched them with our detections and studied the clustering of the detected cores. We estimated purity and completeness of our sample by creating data-driven mocks with the SinFoniA code and linked signal-to-noise to purity. We detected 1678 groups in the COSMOS-Web field up to $z=3.7$, including lists of members extending nearly two magnitudes deeper than the previous AMICO-COSMOS catalog. 756 groups were detected with purity of 80\%. More than 500 groups have their redshift confirmed by assigning spectroscopic counterparts. This group catalog offers a unique opportunity to explore galaxy evolution in different environments spanning $\sim$12 Gyr and to study groups, from the least rich population to the formation of the most massive clusters., Comment: 17 pages, 14 figures, 2 tables (including appendices), submitted to Astronomy & Astrophysics (A&A)
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- 2025
7. Metric graphs of negative type
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Campbell, Rutger, Hendrey, Kevin, Lund, Ben, and Tompkins, Casey
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Mathematics - Combinatorics ,05C12, 51F99 - Abstract
The negative type inequalities of a metric space are closely tied to embeddability. A result by Gupta, Newman, and Rabinovich implies that if a metric graph $G$ does not contain a theta submetric as an embedding, then $G$ has negative type. We show the converse: if a metric graph $G$ contains a theta, then it does not have negative type., Comment: 5 pages, 2 figures
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- 2025
8. Deep Photometric Observations of Ultra-Faint Milky Way Satellites Centaurus I and Eridanus IV
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Casey, Quinn O., Mutlu-Pakdil, Burçin, Sand, David J., Pace, Andrew B., Crnojevic, Denija, Doliva-Dolinsky, Amandine, Cerny, William, Heiger, Mairead E., Riley, Alex H., Ji, Alexander P., Limberg, Guilherme, Marin, Laurella, Martínez-Vázquez, Clara E., Medina, Gustavo E., Li, Ting S., Campana, Sasha N., Chaturvedi, Astha, Sakowska, Joanna D., Zenteno, Alfredo, Carballo-Bello, Julio A., Navabi, Mahdieh, and Bom, Clecio R.
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Astrophysics - Astrophysics of Galaxies - Abstract
We present deep Magellan$+$Megacam imaging of Centaurus I (Cen I) and Eridanus IV (Eri IV), two recently discovered Milky Way ultra-faint satellites. Our data reach $\sim2-3$ magnitudes deeper than the discovery data from the DECam Local Volume Exploration (DELVE) Survey. We use these data to constrain their distances, structural properties (e.g., half-light radii, ellipticity, and position angle), and luminosities. We investigate whether these systems show signs of tidal disturbance, and identify new potential member stars using Gaia EDR3. Our deep color-magnitude diagrams show that Cen I and Eri IV are consistent with an old ($\tau\sim 13.0$ Gyr) and metal-poor ($\text{[Fe/H]}\le-2.2$) stellar population. We find Cen I to have a half-light radius of $r_{h}=2.60\pm0.30'$ ($90.6\pm11$ pc), an ellipticity of $\epsilon=0.36\pm0.05$, a distance of $D=119.8\pm4.1$ kpc ($m-M=20.39\pm0.08$ mag), and an absolute magnitude of $M_{V}=-5.39\pm0.19$. Similarly, Eri IV has $r_{h}=3.24\pm0.48'$ ($65.9\pm10$ pc), $\epsilon=0.26\pm0.09$, $D=69.9\pm3.6$ kpc ($m-M=19.22\pm0.11$ mag), and $M_{V}=-3.55\pm0.24$. These systems occupy a space on the size-luminosity plane consistent with other known Milky Way dwarf galaxies which supports the findings from our previous spectroscopic follow-up. Cen I has a well-defined morphology which lacks any clear evidence of tidal disruption, whereas Eri IV hosts a significant extended feature with multiple possible interpretations., Comment: 14 pages, 3 figures. Submitted to ApJ, comments are welcome!
- Published
- 2025
9. The Cosmic Evolution Early Release Science Survey (CEERS)
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Finkelstein, Steven L., Bagley, Micaela B., Haro, Pablo Arrabal, Dickinson, Mark, Ferguson, Henry C., Kartaltepe, Jeyhan S., Kocevski, Dale D., Koekemoer, Anton M., Lotz, Jennifer M., Papovich, Casey, Perez-Gonzalez, Pablo G., Pirzkal, Nor, Somerville, Rachel S., Trump, Jonathan R., Yang, Guang, Yung, L. Y. Aaron, Fontana, Adriano, Grazian, Andrea, Grogin, Norman A., Kewley, Lisa J., Kirkpatrick, Allison, Larson, Rebecca L., Pentericci, Laura, Ravindranath, Swara, Wilkins, Stephen M., Almaini, Omar, Amorin, Ricardo O., Barro, Guillermo, Bhatawdekar, Rachana, Bisigello, Laura, Brooks, Madisyn, Buitrago, Fernando, Calabro, Antonello, Castellano, Marco, Cheng, Yingjie, Cleri, Nikko J., Cole, Justin W., Cooper, M. C., Cooper, Olivia R., Costantin, Luca, Cox, Isa G., Croton, Darren, Daddi, Emanuele, Davis, Kelcey, Dekel, Avishai, Elbaz, David, Fernandez, Vital, Fujimoto, Seiji, Gandolfi, Giovanni, Gardner, Jonathan P., Gawiser, Eric, Giavalisco, Mauro, Gomez-Guijarro, Carlos, Guo, Yuchen, Gupta, Ansh R., Hathi, Nimish P., Harish, Santosh, Henry, Aurelien, Hirschmann, Michaela, Hu, Weida, Hutchison, Taylor A., Iyer, Kartheik G., Jaskot, Anne E., Jha, Saurabh W., Jung, Intae, Kokorev, Vasily, Kurczynski, Peter, Leung, Gene C. K., Llerena, Mario, Long, Arianna S., Lucas, Ray A., Lu, Shiying, McGrath, Elizabeth J., McIntosh, Daniel H., Merlin, Emiliano, Morales, Alexa M., Napolitano, Lorenzo, Pacucci, Fabio, Pandya, Viraj, Rafelski, Marc, Rodighiero, Giulia, Rose, Caitlin, Santini, Paola, Seille, Lise-Marie, Simons, Raymond C., Shen, Lu, Straughn, Amber N., Tacchella, Sandro, Vanderhoof, Brittany N., Vega-Ferrero, Jesus, Weiner, Benjamin J., Willmer, Christopher N. A., Zhu, Peixin, Bell, Eric F., Wuyts, Stijn, Holwerda, Benne W., Wang, Xin, Wang, Weichen, and Zavala, Jorge A.
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Astrophysics - Astrophysics of Galaxies - Abstract
We present the Cosmic Evolution Early Release Science (CEERS) Survey, a 77.2 hour Director's Discretionary Early Release Science Program. CEERS demonstrates, tests, and validates efficient extragalactic surveys using coordinated, overlapping parallel observations with the JWST instrument suite, including NIRCam and MIRI imaging, NIRSpec low (R~100) and medium (R~1000) resolution spectroscopy, and NIRCam slitless grism (R~1500) spectroscopy. CEERS targets the Hubble Space Telescope-observed region of the Extended Groth Strip (EGS) field, supported by a rich set of multiwavelength data. CEERS facilitated immediate community science in both of the extragalactic core JWST science drivers ``First Light" and ``Galaxy Assembly," including: 1) The discovery and characterization of large samples of galaxies at z >~ 10 from ~90 arcmin^2 of NIRCam imaging, constraining their abundance and physical nature; 2) Deep spectra of >1000 galaxies, including dozens of galaxies at 6
3; and 4) Characterizing galaxy mid-IR emission with MIRI to study dust-obscured star-formation and supermassive black hole growth at z~1-3. As a legacy product for the community, the CEERS team has provided several data releases, accompanied by detailed notes on the data reduction procedures and notebooks to aid in reproducibility. In addition to an overview of the survey and quality of the data, we provide science highlights from the first two years with CEERS data., Comment: 38 pages, 13 figures, 6 tables - Published
- 2025
10. Assessing the Impact of Binary Systems on Microlensing Using SPISEA and PopSyCLE Population Simulations
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Abrams, Natasha S., Lu, Jessica R., Lam, Casey Y., Medford, Michael S., Hosek, Jr., Matthew W., and Rose, Sam
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Astrophysics - Solar and Stellar Astrophysics ,Astrophysics - Astrophysics of Galaxies - Abstract
Gravitational microlensing provides a unique opportunity to probe the mass distribution of stars, black holes, and other objects in the Milky Way. Population simulations are necessary to interpret results from microlensing surveys. The contribution from binary objects is often neglected or minimized in analysis of observations and simulations despite the high percentage of binary systems and microlensing's ability to probe binaries. To simulate the population effects we added multiple systems to Stellar Population Interface for Stellar Evolution and Atmospheres (SPISEA), which simulates stellar clusters. We then inject these multiples into Population Synthesis for Compact-object Lensing Events (PopSyCLE), which simulates Milky Way microlensing surveys. When making OGLE observational selection criteria, we find that 55% of observed microlensing events involve a binary system. Specifically, 14.5% of events have a multiple-lens and a single source, 31.7% have a single lens and a multiple-source, and 8.8% have a multiple-lens and a multiple-source. The majority of these events have photometric lightcurves that appear single and are fit well by a single-lens, single-source model. This suggests that binary source and binary lens-binary source models should be included more frequently in event analysis. The mean Einstein crossing time shifts from 19.1 days for single events only to 21.3 days for singles and multiple events, after cutting binary events with multiple peaks. The Einstein crossing time distribution of singles and single-peaked multiple events is better aligned with observed distributions from OGLE (arXiv:1707.07634) than singles alone, indicating that multiple systems are a significant missing piece between simulations and reality., Comment: 23 pages, 12 figures, Accepted to ApJ
- Published
- 2025
11. Multifractal Terrain Generation for Evaluating Autonomous Off-Road Ground Vehicles
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Majhor, Casey D. and Bos, Jeremy P.
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Computer Science - Robotics - Abstract
We present a multifractal artificial terrain generation method that uses the 3D Weierstrass-Mandelbrot function to control roughness. By varying the fractal dimension used in terrain generation across three different values, we generate 60 unique off-road terrains. We use gradient maps to categorize the roughness of each terrain, consisting of low-, semi-, and high-roughness areas. To test how the fractal dimension affects the difficulty of vehicle traversals, we measure the success rates, vertical accelerations, pitch and roll rates, and traversal times of an autonomous ground vehicle traversing 20 randomized straight-line paths in each terrain. As we increase the fractal dimension from 2.3 to 2.45 and from 2.45 to 2.6, we find that the median area of low-roughness terrain decreases 13.8% and 7.16%, the median area of semi-rough terrain increases 11.7% and 5.63%, and the median area of high-roughness terrain increases 1.54% and 3.33%, all respectively. We find that the median success rate of the vehicle decreases 22.5% and 25% as the fractal dimension increases from 2.3 to 2.45 and from 2.45 to 2.6, respectively. Successful traversal results show that the median root-mean-squared vertical accelerations, median root-mean-squared pitch and roll rates, and median traversal times all increase with the fractal dimension., Comment: This work has been accepted for publication in ASME Journal of Autonomous Vehicles and Systems
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- 2025
12. An Empirical Study of Safetensors' Usage Trends and Developers' Perceptions
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Casey, Beatrice, Damian, Kaia, Cotaj, Andrew, and Santos, Joanna C. S.
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Computer Science - Software Engineering - Abstract
Developers are sharing pre-trained Machine Learning (ML) models through a variety of model sharing platforms, such as Hugging Face, in an effort to make ML development more collaborative. To share the models, they must first be serialized. While there are many methods of serialization in Python, most of them are unsafe. To tame this insecurity, Hugging Face released safetensors as a way to mitigate the threats posed by unsafe serialization formats. In this context, this paper investigates developer's shifts towards using safetensors on Hugging Face in an effort to understand security practices in the ML development community, as well as how developers react to new methods of serialization. Our results find that more developers are adopting safetensors, and many safetensor adoptions were made by automated conversions of existing models by Hugging Face's conversion tool. We also found, however, that a majority of developers ignore the conversion tool's pull requests, and that while many developers are facing issues with using safetensors, they are eager to learn about and adapt the format.
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- 2025
13. A Link Between White Dwarf Pulsars and Polars: Multiwavelength Observations of the 9.36-Minute Period Variable Gaia22ayj
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Rodriguez, Antonio C., El-Badry, Kareem, Hakala, Pasi, Rodríguez-Gil, Pablo, Bao, Tong, Galiullin, Ilkham, Kurlander, Jacob A., Law, Casey J., Pelisoli, Ingrid, Schreiber, Matthias R., Burdge, Kevin, Caiazzo, Ilaria, van Roestel, Jan, Szkody, Paula, Drake, Andrew J., Buckley, David A. H., Potter, Stephen B., Gaensicke, Boris, Mori, Kaya, Bellm, Eric C., Kulkarni, Shrinivas R., Prince, Thomas A., Graham, Matthew, Kasliwal, Mansi M., Rose, Sam, Sharma, Yashvi, Ahumada, Tomás, Anand, Shreya, Viitanen, Akke, Wold, Avery, Chen, Tracy X., Riddle, Reed, and Smith, Roger
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Astrophysics - Solar and Stellar Astrophysics ,Astrophysics - High Energy Astrophysical Phenomena - Abstract
White dwarfs (WDs) are the most abundant compact objects, and recent surveys have suggested that over a third of WDs in accreting binaries host a strong (B $\gtrsim$ 1 MG) magnetic field. However, the origin and evolution of WD magnetism remain under debate. Two WD pulsars, AR Sco and J191213.72-441045.1 (J1912), have been found, which are non-accreting binaries hosting rapidly spinning (1.97-min and 5.30-min, respectively) magnetic WDs. The WD in AR Sco is slowing down on a $P/\dot{P}\approx 5.6\times 10^6$ yr timescale. It is believed they will eventually become polars, accreting systems in which a magnetic WD (B $\approx 10-240$ MG) accretes from a Roche lobe-filling donor spinning in sync with the orbit ($\gtrsim 78$ min). Here, we present multiwavelength data and analysis of Gaia22ayj, which outbursted in March 2022. We find that Gaia22ayj is a magnetic accreting WD that is rapidly spinning down ($P/\dot{P} = 6.1^{+0.3}_{-0.2}\times 10^6$ yr) like WD pulsars, but shows clear evidence of accretion, like polars. Strong linear polarization (40%) is detected in Gaia22ayj; such high levels have only been seen in the WD pulsar AR Sco and demonstrate the WD is magnetic. High speed photometry reveals a 9.36-min period accompanying a high amplitude ($\sim 2$ mag) modulation. We associate this with a WD spin or spin-orbit beat period, not an orbital period as was previously suggested. Fast (60-s) optical spectroscopy reveals a broad ``hump'', reminiscent of cyclotron emission in polars, between 4000-8000 Angstrom. We find an X-ray luminosity of $L_X = 2.7_{-0.8}^{+6.2}\times10^{32} \textrm{ erg s}^{-1}$ in the 0.3-8 keV energy range, while two VLA radio campaigns resulted in a non-detection with a $F_r < 15.8\mu\textrm{Jy}$ 3$ \sigma$ upper limit. The shared properties of both WD pulsars and polars suggest that Gaia22ayj is a missing link between the two classes of magnetic WD binaries., Comment: Submitted to PASP; comments welcome
- Published
- 2025
14. Kiri-Spoon: A Kirigami Utensil for Robot-Assisted Feeding
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Keely, Maya, Franco, Brandon, Grothoff, Casey, Jenamani, Rajat Kumar, Bhattacharjee, Tapomayukh, Losey, Dylan P., and Nemlekar, Heramb
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Computer Science - Robotics - Abstract
For millions of adults with mobility limitations, eating meals is a daily challenge. A variety of robotic systems have been developed to address this societal need. Unfortunately, end-user adoption of robot-assisted feeding is limited, in part because existing devices are unable to seamlessly grasp, manipulate, and feed diverse foods. Recent works seek to address this issue by creating new algorithms for food acquisition and bite transfer. In parallel to these algorithmic developments, however, we hypothesize that mechanical intelligence will make it fundamentally easier for robot arms to feed humans. We therefore propose Kiri-Spoon, a soft utensil specifically designed for robot-assisted feeding. Kiri-Spoon consists of a spoon-shaped kirigami structure: when actuated, the kirigami sheet deforms into a bowl of increasing curvature. Robot arms equipped with Kiri-Spoon can leverage the kirigami structure to wrap-around morsels during acquisition, contain those items as the robot moves, and then compliantly release the food into the user's mouth. Overall, Kiri-Spoon combines the familiar and comfortable shape of a standard spoon with the increased capabilities of soft robotic grippers. In what follows, we first apply a stakeholder-driven design process to ensure that Kiri-Spoon meets the needs of caregivers and users with physical disabilities. We next characterize the dynamics of Kiri-Spoon, and derive a mechanics model to relate actuation force to the spoon's shape. The paper concludes with three separate experiments that evaluate (a) the mechanical advantage provided by Kiri-Spoon, (b) the ways users with disabilities perceive our system, and (c) how the mechanical intelligence of Kiri-Spoon complements state-of-the-art algorithms. Our results suggest that Kiri-Spoon advances robot-assisted feeding across diverse foods, multiple robotic platforms, and different manipulation algorithms., Comment: 20 pages, 15 figures
- Published
- 2025
15. Incremental Dialogue Management: Survey, Discussion, and Implications for HRI
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Kennington, Casey, Lison, Pierre, and Schlangen, David
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Computer Science - Computation and Language ,Computer Science - Artificial Intelligence - Abstract
Efforts towards endowing robots with the ability to speak have benefited from recent advancements in NLP, in particular large language models. However, as powerful as current models have become, they still operate on sentence or multi-sentence level input, not on the word-by-word input that humans operate on, affecting the degree of responsiveness that they offer, which is critical in situations where humans interact with robots using speech. In this paper, we review the literature on interactive systems that operate incrementally (i.e., at the word level or below it). We motivate the need for incremental systems, survey incremental modeling of important aspects of dialogue like speech recognition and language generation. Primary focus is on the part of the system that makes decisions, known as the dialogue manager. We find that there is very little research on incremental dialogue management, offer some requirements for practical incremental dialogue management, and the implications of incremental dialogue for embodied, robotic platforms., Comment: 16 pages
- Published
- 2025
16. Strongly interacting matter in extreme magnetic fields
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Adhikari, Prabal, Ammon, Martin, Avancini, Sidney S., Ayala, Alejandro, Bandyopadhyay, Aritra, Blaschke, David, Braghin, Fabio L., Buividovich, Pavel, Cardoso, Rafael P., Cartwright, Casey, Castaño-Yepes, Jorge David, Chernodub, Maxim, Coppola, M., Das, Mayusree, Dutra, Mariana, Endrődi, Gergely, Fang, Jianjun, Farias, Ricardo L. S., Fraga, Eduardo S., Frazon, Arthur, Fukushima, Kenji, García-Muñoz, Juan D., Garnacho-Velasco, Eduardo, Dumm, D. Gomez, Grieninger, Sebastian, Gulminelli, Francesca, Hernandez, Juan, Islam, Chowdhury Aminul, Kaminski, Matthias, Kotov, Andrey, Krein, Gastão, Li, Jing, Lo, Pok Man, Loewe, Marcelo, Lourenço, Odilon, Markó, Gergely, Marquez, Kau D., Mizher, Ana, Mukhopadhyay, Banibrata, Muñoz, Enrique, Noguera, S., Nunes, Rodrigo M., Pais, Helena, Palhares, Letícia F., Providência, Constança, Raya, Alfredo, Restrepo, Tulio, Rojas, Juan Cristóbal, Scoccola, N. N., Scurto, Luigi, Sedrakian, Armen, Smith, Dominik, Tavares, William Rafael, Tejeda-Yeomans, Maria E., Timóteo, Varese S., Tolos, Laura, Villavicencio, Cristian, Weber, Fridolin, Yasui, Shigehiro, Zamora, Renato, and Zuraiq, Zenia
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Nuclear Theory - Abstract
Magnetic fields are ubiquitous across different physical systems of current interest; from the early Universe, compact astrophysical objects and heavy-ion collisions to condensed matter systems. A proper treatment of the effects produced by magnetic fields during the dynamical evolution of these systems, can help to understand observables that otherwise show a puzzling behavior. Furthermore, when these fields are comparable to or stronger than \Lambda_QCD, they serve as excellent probes to help elucidate the physics of strongly interacting matter under extreme conditions of temperature and density. In this work we provide a comprehensive review of recent developments on the description of QED and QCD systems where magnetic field driven effects are important. These include the modification of meson static properties such as masses and form factors, the chiral magnetic effect, the description of anomalous transport coefficients, superconductivity in extreme magnetic fields, the properties of neutron stars, the evolution of heavy-ion collisions, as well as effects on the QCD phase diagram. We describe recent theory and phenomenological developments using effective models as well as LQCD methods. The work represents a state-of-the-art review of the field, motivated by presentations and discussions during the "Workshop on Strongly Interacting Matter in Strong Electromagnetic Fields" that took place in the European Centre for Theoretical Studies in Nuclear Physics and Related Areas (ECT*) in the city of Trento, Italy, September 25-29, 2023., Comment: 325 pages-long review of recent topics of interest in the field of magnetic field effects on QED and QCD matter. To be susbmitted to PNPP
- Published
- 2024
17. Experimental Demonstration of Logical Magic State Distillation
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Rodriguez, Pedro Sales, Robinson, John M., Jepsen, Paul Niklas, He, Zhiyang, Duckering, Casey, Zhao, Chen, Wu, Kai-Hsin, Campo, Joseph, Bagnall, Kevin, Kwon, Minho, Karolyshyn, Thomas, Weinberg, Phillip, Cain, Madelyn, Evered, Simon J., Geim, Alexandra A., Kalinowski, Marcin, Li, Sophie H., Manovitz, Tom, Amato-Grill, Jesse, Basham, James I., Bernstein, Liane, Braverman, Boris, Bylinskii, Alexei, Choukri, Adam, DeAngelo, Robert, Fang, Fang, Fieweger, Connor, Frederick, Paige, Haines, David, Hamdan, Majd, Hammett, Julian, Hsu, Ning, Hu, Ming-Guang, Huber, Florian, Jia, Ningyuan, Kedar, Dhruv, Kornjača, Milan, Liu, Fangli, Long, John, Lopatin, Jonathan, Lopes, Pedro L. S., Luo, Xiu-Zhe, Macrì, Tommaso, Marković, Ognjen, Martínez-Martínez, Luis A., Meng, Xianmei, Ostermann, Stefan, Ostroumov, Evgeny, Paquette, David, Qiang, Zexuan, Shofman, Vadim, Singh, Anshuman, Singh, Manuj, Sinha, Nandan, Thoreen, Henry, Wan, Noel, Wang, Yiping, Waxman-Lenz, Daniel, Wong, Tak, Wurtz, Jonathan, Zhdanov, Andrii, Zheng, Laurent, Greiner, Markus, Keesling, Alexander, Gemelke, Nathan, Vuletić, Vladan, Kitagawa, Takuya, Wang, Sheng-Tao, Bluvstein, Dolev, Lukin, Mikhail D., Lukin, Alexander, Zhou, Hengyun, and Cantú, Sergio H.
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Quantum Physics ,Physics - Atomic Physics - Abstract
Realizing universal fault-tolerant quantum computation is a key goal in quantum information science. By encoding quantum information into logical qubits utilizing quantum error correcting codes, physical errors can be detected and corrected, enabling substantial reduction in logical error rates. However, the set of logical operations that can be easily implemented on such encoded qubits is often constrained, necessitating the use of special resource states known as 'magic states' to implement universal, classically hard circuits. A key method to prepare high-fidelity magic states is to perform 'distillation', creating them from multiple lower fidelity inputs. Here we present the experimental realization of magic state distillation with logical qubits on a neutral-atom quantum computer. Our approach makes use of a dynamically reconfigurable architecture to encode and perform quantum operations on many logical qubits in parallel. We demonstrate the distillation of magic states encoded in d=3 and d=5 color codes, observing improvements of the logical fidelity of the output magic states compared to the input logical magic states. These experiments demonstrate a key building block of universal fault-tolerant quantum computation, and represent an important step towards large-scale logical quantum processors., Comment: 8+11 pages, 4+4 figures
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- 2024
18. GREGoR: Accelerating Genomics for Rare Diseases
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Dawood, Moez, Heavner, Ben, Wheeler, Marsha M., Ungar, Rachel A., LoTempio, Jonathan, Wiel, Laurens, Berger, Seth, Bernstein, Jonathan A., Chong, Jessica X., Délot, Emmanuèle C., Eichler, Evan E., Gibbs, Richard A., Lupski, James R., Shojaie, Ali, Talkowski, Michael E., Wagner, Alex H., Wei, Chia-Lin, Wellington, Christopher, Wheeler, Matthew T., Members, GREGoR Partner, Carvalho, Claudia M. B., Gifford, Casey A., May, Susanne, Miller, Danny E., Rehm, Heidi L., Sedlazeck, Fritz J., Vilain, Eric, O'Donnell-Luria, Anne, Posey, Jennifer E., Chadwick, Lisa H., Bamshad, Michael J., Montgomery, Stephen B., Diseases, Genomics Research to Elucidate the Genetics of Rare, and Consortium
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Quantitative Biology - Other Quantitative Biology - Abstract
Rare diseases are collectively common, affecting approximately one in twenty individuals worldwide. In recent years, rapid progress has been made in rare disease diagnostics due to advances in DNA sequencing, development of new computational and experimental approaches to prioritize genes and genetic variants, and increased global exchange of clinical and genetic data. However, more than half of individuals suspected to have a rare disease lack a genetic diagnosis. The Genomics Research to Elucidate the Genetics of Rare Diseases (GREGoR) Consortium was initiated to study thousands of challenging rare disease cases and families and apply, standardize, and evaluate emerging genomics technologies and analytics to accelerate their adoption in clinical practice. Further, all data generated, currently representing ~7500 individuals from ~3000 families, is rapidly made available to researchers worldwide via the Genomic Data Science Analysis, Visualization, and Informatics Lab-space (AnVIL) to catalyze global efforts to develop approaches for genetic diagnoses in rare diseases (https://gregorconsortium.org/data). The majority of these families have undergone prior clinical genetic testing but remained unsolved, with most being exome-negative. Here, we describe the collaborative research framework, datasets, and discoveries comprising GREGoR that will provide foundational resources and substrates for the future of rare disease genomics.
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- 2024
19. Discovery of dual 'little red dots' indicates excess clustering on kilo-parsec scales
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Tanaka, Takumi S., Silverman, John D., Shimasaku, Kazuhiro, Arita, Junya, Akins, Hollis B., Inayoshi, Kohei, Ding, Xuheng, Onoue, Masafusa, Liu, Zhaoxuan, Casey, Caitlin M., Lambrides, Erini, Kokorev, Vasily, Jin, Shuowen, Faisst, Andreas L., Drakos, Nicole, Shen, Yue, Li, Junyao, Zhuang, Mingyang, Fei, Qinyue, Ito, Kei, Ren, Wenke, Matsui, Suin, Ando, Makoto, Hatano, Shun, Fujii, Michiko S., Kartaltepe, Jeyhan S., Koekemoer, Anton M., Liu, Daizhong, McCracken, Henry Joy, Rhodes, Jason, Robertson, Brant E., Franco, Maximilien, Andika, Irham T., Cloonan, Aidan P., Fan, Xiaohui, Gozaliasl, Ghassem, Harish, Santosh, Hayward, Christopher C., Huertas-Company, Marc, Kakkad, Darshan, Kinugawa, Tomoya, Roy, Namrata, Shuntov, Marko, Talia, Margherita, Toft, Sune, Vijayan, Aswin P., and Zhang, Yiyang
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Astrophysics - Astrophysics of Galaxies - Abstract
``Little Red Dots'' (LRDs) are an abundant high-redshift population newly discovered by the James Webb Space Telescope (JWST). They are characterized by a red color in the rest-frame optical band, compact morphology, and broad Balmer emission lines (${\rm FWHM} \gtrsim 1000~{\rm km\,s^{-1}}$) that suggest an AGN nature. Using a method of pixel-by-pixel color selection and relaxing the compactness criteria, we identify three of the first dual LRD candidates in the COSMOS-Web survey with projected separations of $0.\!\!^{\prime\prime}2-0.\!\!^{\prime\prime}4$ (1-2 pkpc at their photometric redshifts). A comparison between existing LRD samples and mock data reveals that the projected separations of these dual LRD candidates are unlikely to result from chance projections of objects at different redshifts. In one case (CW-B5-15958), the dual LRD includes two bright sources ($m_{\rm F444W}=24.3$ and $24.8$) with characteristic V-shape spectral energy distribution (SEDs) and photometric redshifts consistent with each other. We find that CW-B5-15958 has a faint off-centered component and a companion galaxy. In the other two dual systems, the brighter LRD exhibits a V-shape SED, while the fainter LRD ($m_{\rm F444W}\gtrsim26$) is undetected in both F115W and F150W. These discoveries suggest that the angular auto-correlation function (ACF) of LRDs exhibits a significant excess ($\sim3\times10^2$ times) on sub-arcsec (kilo-parsec) separations compared to the extrapolation of a power-law ACF of JWST-found AGNs measured over $10^{\prime\prime}-100^{\prime\prime}$. Follow-up spectroscopic confirmation of their redshifts and the construction of a larger sample are essential to advance our understanding of the evolution of supermassive black holes and the importance of mergers in the early universe., Comment: 12 pages, 5 figures, and 1 table. Comments are welcome
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- 2024
20. PANORAMIC: Discovery of an Ultra-Massive Grand-Design Spiral Galaxy at $z\sim5.2$
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Xiao, Mengyuan, Williams, Christina C., Oesch, Pascal A., Elbaz, David, Dessauges-Zavadsky, Miroslava, Chaves, Rui Marques Coelho, Bing, Longji, Ji, Zhiyuan, Weibel, Andrea, Bezanson, Rachel, Brammer, Gabriel, Casey, Caitlin, Cloonan, Aidan P., Daddi, Emanuele, Dayal, Pratika, Faisst, Andreas L., Franx, Marijn, Glazebrook, Karl, Hutter, Anne, Kartaltepe, Jeyhan S., Labbe, Ivo, Lagache, Guilaine, Lim, Seunghwan, Magnelli, Benjamin, Martinez, Felix, Maseda, Michael V., Nanayakkara, Themiya, Schaerer, Daniel, and Whitaker, Katherine E.
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Astrophysics - Astrophysics of Galaxies - Abstract
We report the discovery of an ultra-massive grand-design red spiral galaxy, named Zh\'ul\'ong (Torch Dragon), at $z_{\rm phot} = 5.2^{+0.3}_{-0.2}$ in the JWST PANORAMIC survey, identified as the most distant bulge+disk galaxy with spiral arms known to date. Zh\'ul\'ong displays an extraordinary combination of properties: 1) a classical bulge centered in a large, face-on exponential stellar disk (half-light radius of $R_{\rm e} = 3.7 \pm 0.1 \, \mathrm{kpc}$), with spiral arms extending across 19 kpc; 2) a clear transition from the red, quiescent core ($F150W-F444W=3.1$ mag) with high stellar mass surface density ($\log(\Sigma M_{\star}/M_{\odot} \, \mathrm{kpc}^{-2}) = 9.91_{-0.09}^{+0.11}$) to the star-forming outer regions, as revealed by spatially resolved SED analysis, which indicates significant inside-out galaxy growth; 3) an extremely high stellar mass at its redshift, with $\log (M_{\star}/M_{\odot})=11.03_{-0.08}^{+0.10}$ comparable to the Milky Way, and an implied baryon-to-star conversion efficiency ($\epsilon \sim 0.3$) that is 1.5 times higher than even the most efficient galaxies at later epochs; 4) despite an active disk, a relatively modest overall star formation rate ($\mathrm{SFR} =66_{-46}^{+89} ~M_{\odot} \, \mathrm{yr}^{-1}$), which is $>$0.5 dex below the star formation main sequence at $z \sim 5.2$ and $>$10 times lower than ultra-massive dusty galaxies at $z=5-6$. Altogether, Zh\'ul\'ong shows that mature galaxies emerged much earlier than expected in the first billion years after the Big Bang through rapid galaxy formation and morphological evolution. Our finding offers key constraints for models of massive galaxy formation and the origin of spiral structures in the early universe., Comment: 11 pages, 5 main figures, 2 extended figures, 1 table; submitted to A&A
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- 2024
21. Exploring natural variation in tendon constitutive parameters via Bayesian data selection and mixed effects models
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Casey, James, Forsyth, Jessica, Waite, Timothy, Cotter, Simon, and Shearer, Tom
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Statistics - Applications - Abstract
Combining microstructural mechanical models with experimental data enhances our understanding of the mechanics of soft tissue, such as tendons. In previous work, a Bayesian framework was used to infer constitutive parameters from uniaxial stress-strain experiments on horse tendons, specifically the superficial digital flexor tendon (SDFT) and common digital extensor tendon (CDET), on a per-experiment basis. Here, we extend this analysis to investigate the natural variation of these parameters across a population of horses. Using a Bayesian mixed effects model, we infer population distributions of these parameters. Given that the chosen hyperelastic model does not account for tendon damage, careful data selection is necessary. Avoiding ad hoc methods, we introduce a hierarchical Bayesian data selection method. This two-stage approach selects data per experiment, and integrates data weightings into the Bayesian mixed effects model. Our results indicate that the CDET is stiffer than the SDFT, likely due to a higher collagen volume fraction. The modes of the parameter distributions yield estimates of the product of the collagen volume fraction and Young's modulus as 811.5 MPa for the SDFT and 1430.2 MPa for the CDET. This suggests that positional tendons have stiffer collagen fibrils and/or higher collagen volume density than energy-storing tendons., Comment: 16 pages, 9 figures
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- 2024
22. Soft Checksums to Flag Untrustworthy Machine Learning Surrogate Predictions and Application to Atomic Physics Simulations
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Lauer, Casey, Blake, Robert C., and Freund, Jonathan B.
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Computer Science - Machine Learning ,Physics - Atomic Physics - Abstract
Trained neural networks (NN) are attractive as surrogate models to replace costly calculations in physical simulations, but are often unknowingly applied to states not adequately represented in the training dataset. We present the novel technique of soft checksums for scientific machine learning, a general-purpose method to differentiate between trustworthy predictions with small errors on in-distribution (ID) data points, and untrustworthy predictions with large errors on out-of-distribution (OOD) data points. By adding a check node to the existing output layer, we train the model to learn the chosen checksum function encoded within the NN predictions and show that violations of this function correlate with high prediction errors. As the checksum function depends only on the NN predictions, we can calculate the checksum error for any prediction with a single forward pass, incurring negligible time and memory costs. Additionally, we find that incorporating the checksum function into the loss function and exposing the NN to OOD data points during the training process improves separation between ID and OOD predictions. By applying soft checksums to a physically complex and high-dimensional non-local thermodynamic equilibrium atomic physics dataset, we show that a well-chosen threshold checksum error can effectively separate ID and OOD predictions., Comment: 8 pages, 3 figures
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- 2024
23. A Bayesian Model of Underreporting for Sexual Assault on College Campuses
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Bradshaw, Casey and Blei, David M.
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Statistics - Applications - Abstract
In an effort to quantify and combat sexual assault, US colleges and universities are required to disclose the number of reported sexual assaults on their campuses each year. However, many instances of sexual assault are never reported to authorities, and consequently the number of reported assaults does not fully reflect the true total number of assaults that occurred; the reported values could arise from many combinations of reporting rate and true incidence. In this paper we estimate these underlying quantities via a hierarchical Bayesian model of the reported number of assaults. We use informative priors, based on national crime statistics, to act as a tiebreaker to help distinguish between reporting rates and incidence. We outline a Hamiltonian Monte Carlo (HMC) sampling scheme for posterior inference regarding reporting rates and assault incidence at each school, and apply this method to campus sexual assault data from 2014-2019. Results suggest an increasing trend in reporting rates for the overall college population during this time. However, the extent of underreporting varies widely across schools. That variation has implications for how individual schools should interpret their reported crime statistics.
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- 2024
24. Revisiting Absence withSymptoms that *T* Show up Decades Later to Recover Empty Categories
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Chen, Emily, Huang, Nicholas, Robinson, Casey, Xu, Kevin, Huang, Zihao, and Park, Jungyeul
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Computer Science - Computation and Language - Abstract
This paper explores null elements in English, Chinese, and Korean Penn treebanks. Null elements contain important syntactic and semantic information, yet they have typically been treated as entities to be removed during language processing tasks, particularly in constituency parsing. Thus, we work towards the removal and, in particular, the restoration of null elements in parse trees. We focus on expanding a rule-based approach utilizing linguistic context information to Chinese, as rule based approaches have historically only been applied to English. We also worked to conduct neural experiments with a language agnostic sequence-to-sequence model to recover null elements for English (PTB), Chinese (CTB) and Korean (KTB). To the best of the authors' knowledge, null elements in three different languages have been explored and compared for the first time. In expanding a rule based approach to Chinese, we achieved an overall F1 score of 80.00, which is comparable to past results in the CTB. In our neural experiments we achieved F1 scores up to 90.94, 85.38 and 88.79 for English, Chinese, and Korean respectively with functional labels., Comment: 10 pages
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- 2024
25. Foregrounding leadership connectedness: A preservice teacher preparation program to staff Australian regional, rural and remote school
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Thiele, Catherine, Simon, Susan, Casey, Joanne, Dole, Shelley, and Eager, Linda
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- 2024
26. Exploring the Political Frontier in Australian Schools: Bernsteinian Insights on Civics and Citizenship Education
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Peter Brett, Jennifer Casey, and Lachlan Nicolson
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Contemporary liberal democracies face complex and disruptive challenges, such as toxic populism, culture wars, political polarization, religious fundamentalism, the climate emergency, global conflicts, and the influence of powerful social media platforms. This is the disconcerting world that young people are growing up in and need support in understanding and mediating. This paper critically analyses the Australian Civics and Citizenship education curricular response using the theoretical insights of Basil Bernstein to understand the types of citizens it aims to nurture. Through analysing the language of the Australian Curriculum, the processes and intellectual influences behind its creation, and specific curricular content descriptors, the paper illuminates the social and ideological assumptions embedded in its vision of educating for democratic citizenship. We argue that political education remains a domain that Australian curriculum framers, schools, and teachers have approached cautiously. The paper highlights the curriculum's inadequacy in addressing early twenty-first-century political imperatives related to democratic deconsolidation, falling short of Bernsteinian ideals.
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- 2024
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27. Mineral Scaling in 3D Interfacial Solar Evaporators─A Challenge for Brine Treatment and Lithium Recovery.
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Eskafi, Aydin, De Finnda, Casey, Garcia, Christopher, and Mi, Baoxia
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3D evaporator ,Interfacial solar evaporation ,divalent cation scaling ,graphene oxide ,lithium recovery ,solar desalination ,solar resource recovery ,Lithium ,Minerals ,Salts ,Sunlight - Abstract
In this work, we analyzed the effects of mineral scaling on the performance of a 3D interfacial solar evaporator, with a focus on the cations relevant to lithium recovery from brackish water. The field has been rapidly moving toward resource recovery applications from brines with higher cation concentrations. However, the potential complications caused by common minerals in these brines other than NaCl have been largely overlooked. Therefore, in this study, we thoroughly examined the effects of two common cations (calcium and magnesium) on the long-term solar evaporation performance of a 3D graphene oxide stalk. The 3D stalk can achieve an evaporation flux as high as 17.8 kg m-2 h-1 under one-sun illumination, and accumulation of NaCl on the stalk surface has no impact. However, the presence of CaCl2 and MgCl2 significantly reduces the evaporative flux even in solutions lacking scale-forming anions. A close examination of scale formation during long-term evaporation experiments revealed that CaCl2 and MgCl2 tend to precipitate out within the stalk, thus blocking water transport through the stalk and significantly dropping the evaporation rates. These findings imply that research attention is needed to modify and optimize the internal water transport channels for 3D evaporators. Additionally, we emphasize the importance of testing realistic mixtures─including prominent divalent cations─ and testing long-term operations in interfacial solar evaporation research and investigating approaches to mitigate the negative impacts of divalent cations.
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- 2025
28. Sequential Pore Functionalization in MOFs for Enhanced Carbon Dioxide Capture
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Yadav, Ankit K, Gładysiak, Andrzej, Song, Ah-Young, Gan, Lei, Simons, Casey R, Alghoraibi, Nawal M, Alahmed, Ammar H, Younes, Mourad, Reimer, Jeffrey A, Huang, Hongliang, Planas, José G, and Stylianou, Kyriakos C
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Inorganic Chemistry ,Chemical Sciences ,Climate Action ,metal-organic frameworks ,ammonia ,postsyntheticmodification ,carbon dioxide ,capture ,Chemical sciences - Abstract
The capture of carbon dioxide (CO2) is crucial for reducing greenhouse emissions and achieving net-zero emission goals. Metal-organic frameworks (MOFs) present a promising solution for carbon capture due to their structural adaptability, tunability, porosity, and pore modification. In this research, we explored the use of a copper (Cu(II))-based MOF called m CBMOF-1. After activation, m CBMOF-1 generates one-dimensional channels with square cross sections, featuring sets of four Cu(II) open metal sites spaced by 6.042 Å, allowing strong interactions with coordinating molecules. To investigate this capability, m CBMOF-1 was exposed to ammonia (NH3) gas, resulting in hysteretic NH3 isotherms indicative of strong interactions between Cu(II) and NH3. At 150 mbar and 298 K, the NH3-loaded (∼1 mmol/g) material exhibited a 106% increase in CO2 uptake compared to that of the pristine m CBMOF-1. Carbon-13 solid-state nuclear magnetic resonance spectra and density functional theory calculations confirmed that the sequential loading of NH3 followed by CO2 adsorption generated a copper-carbamic acid complex within the pores of m CBMOF-1. Our study highlights the effectiveness of sequential pore functionalization in MOFs as an attractive strategy for enhancing the interactions of MOFs with small molecules such as CO2.
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- 2024
29. Spontaneous natural killer cell lymphoproliferative disorder in a rhesus macaque.
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Barro, Marietta, Garzel, Laura, Keesler, Rebekah, Casey, Kerriann, and Olstad, Katherine
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NK cells ,lymphoproliferative diseases ,neoplasia ,rhesus macaques - Abstract
Lymphoproliferative disorders of natural killer (NK)-cell lineage are well documented in humans but have yet to be documented in non-human primates (NHPs). Here we describe a case of NK-cell lymphoproliferative disorder/leukemia in a 20-y-old captive female rhesus macaque (Macaca mulatta). The animal clinically had mild splenomegaly and marked lymphocytosis with small-to-medium lymphocytes in blood smears. By flow cytometry and cluster differentiation, the lymphocytes were CD3-negative, CD8-positive, CD4-negative, and CD20-negative for cell surface markers; immunohistochemistry revealed the presence of intracellular CD3 and granzyme B. This immunoprofile is consistent with a NK-cell phenotype. Histologically, these cells were predominantly intravascular within the splenic red pulp, liver sinusoids, and to a lesser degree bone marrow. Oncogenic viruses, such as Mason-Pfizer monkey viruses (MPMV; formerly, and commonly known as, simian retroviruses or SRV; Retroviridae, Betaretrovirus maspfimon); simian immunodeficiency virus (SIV; Retroviridae, Lentivirus simimdef), and primate T-lymphotropic virus 1 (PTLV1; commonly known as simian T-lymphotropic virus type 1, STLV1; Retroviridae, Deltaretrovirus priTlym1), were not detected in this animal by serology. Immunohistochemistry using EBNA2 antibody to detect rhesus and cynomolgus monkey lymphocryptovirus (McGHV4/RLV and McGHV10 respectively; Orthoherpesviridae, Lymphocryptovirus macacinegamma4 and Lymphocryptovirus macacinegamma13, respectively) was negative. Together these findings are consistent with a diagnosis of naturally occurring NK-cell lymphoproliferative disorder. NK-cell lymphoproliferative disorder has not been reported previously in rhesus macaques, to our knowledge.
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- 2024
30. Consensus Recommendations for Studies of Outflow Facility and Intraocular Pressure Regulation Using Ex Vivo Perfusion Approaches.
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Acott, Ted, Fautsch, Michael, Mao, Weiming, Ethier, C, Huang, Alex, Kelley, Mary, Aga, Mini, Bhattacharya, Sanjoy, Borras, Terete, Bovenkamp, Diane, Chowdhury, Uttio, Clark, Abbot, Dibas, Mohammed, Du, Yiqin, Elliott, Michael, Faralli, Jennifer, Gong, Haiyan, Herberg, Samuel, Johnstone, Murray, Kaufman, Paul, Keller, Kate, Kelly, Ruth, Krizaj, David, Kuehn, Markus, Li, Hoi, Lieberman, Raquel, Lin, Shan, Liu, Yutao, McDonnell, Fiona, McDowell, Colleen, McLellan, Gillian, Mzyk, Philip, Nair, Kayarat, Overby, Darryl, Peters, Donna, Raghunathan, VijayKrishna, Rao, Ponugoti, Roddy, Gavin, Sharif, Najam, Shim, Myoung, Sun, Yang, Thomson, Benjamin, Toris, Carol, Willoughby, Colin, Zhang, Hao, Freddo, Thomas, Fuchshofer, Rudolf, Hill, Kamisha, Karimi, Alireza, Kizhatil, Krishnakumar, Kopcyznski, Casey, Liton, Paloma, Patel, Gaurang, Peng, Michael, Pattabiraman, Padmanabhan, Prasanna, Ganesh, Reina-Torres, Ester, Samples, E, Samples, John, Steel, Cynthia, Strohmaier, Clemens, Subramanian, Preeti, Sugali, Chenna, van Batenburg-Sherwood, Joseph, Wong, Cydney, Youngblood, Hannah, Zode, Gulab, White, Elizabeth, and Stamer, W
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Animals ,Humans ,Anterior Eye Segment ,Aqueous Humor ,Consensus ,Glaucoma ,Intraocular Pressure ,Organ Culture Techniques ,Perfusion ,Trabecular Meshwork - Abstract
Intraocular pressure (IOP) elevation is the primary risk factor and currently the main treatable factor for progression of glaucomatous optic neuropathy. In addition to direct clinical and living animal in vivo studies, ex vivo perfusion of anterior segments and whole eyes is a key technique for studying conventional outflow function as it is responsible for IOP regulation. We present well-tested experimental details, protocols, considerations, advantages, and limitations of several ex vivo model systems for studying IOP regulation. These include: (1) perfused whole globes, (2) stationary anterior segment organ culture, (3) perfused human anterior segment organ culture, (4) perfused animal anterior segment organ culture, (5) perfused human corneal rims, and (6) perfused human anterior segment wedges. These methods, with due consideration paid to their strengths and limitations, comprise a set of very strong tools for extending our understanding of IOP regulation.
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- 2024
31. Variation in the Impact of New York on Pause on Traffic Congestion by Racialized Economic Segregation and Environmental Burden.
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Shearston, Jenni, Saxena, Roheeni, Casey, Joan, Kioumourtzoglou, Marianthi-Anna, and Hilpert, Markus
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COVID‐19 ,New York ,crowd‐sensed data ,environmental justice ,legislation and regulations ,policy ,pollution: urban and regional ,traffic congestion - Abstract
During the 2019 coronavirus pandemic, stay-at-home policies such as New Yorks (NY) NY on Pause dramatically reduced traffic congestion. Despite high traffic burden in NYs environmental justice communities, this reduction has not been evaluated through an environmental justice lens-our objective in this analysis. We obtained census tract-level traffic congestion data from Google traffic maps hourly for 2018-2020. We defined congestion as the percent of streets in a census tract with heavy traffic (red- or maroon-color). We used the Index of Concentration at the Extremes (ICE) to measure racialized economic segregation and the CDCs Environmental Justice Index (EJI) as a measure of combined environmental, social, and chronic disease burden. We divided census tracts into quintiles of ICE and EJI and used linear mixed models stratified by ICE and EJI quintile in an interrupted time series design. Prior to NY on Pause, less marginalized and burdened census tracts (Q5) tended to have higher levels of traffic congestion; during NY on Pause, this trend reversed. For both ICE and EJI, more marginalized and burdened (Q1-Q2 vs. Q4-Q5) tracts had smaller absolute decreases in percent traffic congestion. For example, percent traffic congestion in ICE Q5 decreased by 7.8% (% change: -36.6%), but in Q1, it decreased by 4.2% (% change: -51.7%). NY on Pause, while protecting residents during COVID-19, may have resulted in inequitable reductions in traffic congestion. It is critical that such inequities are measured and acknowledged so that future policies to reduce traffic congestion and respond to pandemics can enhance equity.
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- 2024
32. Euclid: Searches for strong gravitational lenses using convolutional neural nets in Early Release Observations of the Perseus field
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Pearce-Casey, R., Nagam, B. C., Wilde, J., Busillo, V., Ulivi, L., Andika, I. T., Manjón-García, A., Leuzzi, L., Matavulj, P., Serjeant, S., Walmsley, M., Barroso, J. A. Acevedo, O'Riordan, C. M., Clément, B., Tortora, C., Collett, T. E., Courbin, F., Gavazzi, R., Metcalf, R. B., Cabanac, R., Courtois, H. M., Crook-Mansour, J., Delchambre, L., Despali, G., Ecker, L. R., Franco, A., Holloway, P., Jahnke, K., Mahler, G., Marchetti, L., Melo, A., Meneghetti, M., Müller, O., Nucita, A. A., Pearson, J., Rojas, K., Scarlata, C., Schuldt, S., Sluse, D., Suyu, S. H., Vaccari, M., Vegetti, S., Verma, A., Vernardos, G., Bolzonella, M., Kluge, M., Saifollahi, T., Schirmer, M., Stone, C., Paulino-Afonso, A., Bazzanini, L., Hogg, N. B., Koopmans, L. V. E., Kruk, S., Mannucci, F., Bromley, J. M., Díaz-Sánchez, A., Dickinson, H. J., Powell, D. M., Bouy, H., Laureijs, R., Altieri, B., Amara, A., Andreon, S., Baccigalupi, C., Baldi, M., Balestra, A., Bardelli, S., Battaglia, P., Bonino, D., Branchini, E., Brescia, M., Brinchmann, J., Caillat, A., Camera, S., Capobianco, V., Carbone, C., Carretero, J., Casas, S., Castellano, M., Castignani, G., Cavuoti, S., Cimatti, A., Colodro-Conde, C., Congedo, G., Conselice, C. J., Conversi, L., Copin, Y., Cropper, M., Da Silva, A., Degaudenzi, H., De Lucia, G., Di Giorgio, A. M., Dinis, J., Dubath, F., Dupac, X., Dusini, S., Farina, M., Farrens, S., Faustini, F., Ferriol, S., Frailis, M., Franceschi, E., Galeotta, S., George, K., Gillard, W., Gillis, B., Giocoli, C., Gómez-Alvarez, P., Grazian, A., Grupp, F., Haugan, S. V. H., Holmes, W., Hook, I., Hormuth, F., Hornstrup, A., Hudelot, P., Jhabvala, M., Joachimi, B., Keihänen, E., Kermiche, S., Kiessling, A., Kilbinger, M., Kubik, B., Kümmel, M., Kunz, M., Kurki-Suonio, H., Mignant, D. Le, Ligori, S., Lilje, P. B., Lindholm, V., Lloro, I., Maiorano, E., Mansutti, O., Marggraf, O., Markovic, K., Martinelli, M., Martinet, N., Marulli, F., Massey, R., Medinaceli, E., Mei, S., Melchior, M., Mellier, Y., Merlin, E., Meylan, G., Moresco, M., Moscardini, L., Nakajima, R., Neissner, C., Nichol, R. C., Niemi, S. -M., Nightingale, J. W., Padilla, C., Paltani, S., Pasian, F., Pedersen, K., Percival, W. J., Pettorino, V., Pires, S., Polenta, G., Poncet, M., Popa, L. A., Pozzetti, L., Raison, F., Renzi, A., Rhodes, J., Riccio, G., Romelli, E., Roncarelli, M., Rossetti, E., Saglia, R., Sakr, Z., Sánchez, A. G., Sapone, D., Sartoris, B., Schneider, P., Schrabback, T., Secroun, A., Seidel, G., Serrano, S., Sirignano, C., Sirri, G., Skottfelt, J., Stanco, L., Steinwagner, J., Tallada-Crespí, P., Tereno, I., Toledo-Moreo, R., Torradeflot, F., Tutusaus, I., Valentijn, E. A., Valenziano, L., Vassallo, T., Kleijn, G. Verdoes, Veropalumbo, A., Wang, Y., Weller, J., Zamorani, G., Zucca, E., Burigana, C., Calabrese, M., Mora, A., Pöntinen, M., Scottez, V., Viel, M., and Margalef-Bentabol, B.
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Astrophysics - Instrumentation and Methods for Astrophysics ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
The Euclid Wide Survey (EWS) is predicted to find approximately 170 000 galaxy-galaxy strong lenses from its lifetime observation of 14 000 deg^2 of the sky. Detecting this many lenses by visual inspection with professional astronomers and citizen scientists alone is infeasible. Machine learning algorithms, particularly convolutional neural networks (CNNs), have been used as an automated method of detecting strong lenses, and have proven fruitful in finding galaxy-galaxy strong lens candidates. We identify the major challenge to be the automatic detection of galaxy-galaxy strong lenses while simultaneously maintaining a low false positive rate. One aim of this research is to have a quantified starting point on the achieved purity and completeness with our current version of CNN-based detection pipelines for the VIS images of EWS. We select all sources with VIS IE < 23 mag from the Euclid Early Release Observation imaging of the Perseus field. We apply a range of CNN architectures to detect strong lenses in these cutouts. All our networks perform extremely well on simulated data sets and their respective validation sets. However, when applied to real Euclid imaging, the highest lens purity is just 11%. Among all our networks, the false positives are typically identifiable by human volunteers as, for example, spiral galaxies, multiple sources, and artefacts, implying that improvements are still possible, perhaps via a second, more interpretable lens selection filtering stage. There is currently no alternative to human classification of CNN-selected lens candidates. Given the expected 10^5 lensing systems in Euclid, this implies 10^6 objects for human classification, which while very large is not in principle intractable and not without precedent., Comment: 22 pages, 11 figures, Euclid consortium paper, A&A submitted
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- 2024
33. Can an increase in productivity cause a decrease in production? Insights from a model economy with AI automation
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Barkan, Casey O.
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Economics - General Economics - Abstract
It is widely assumed that increases in economic productivity necessarily lead to economic growth. In this paper, it is shown that this is not always the case. An idealized model of an economy is presented in which a new technology allows capital to be utilized autonomously without labor input. This is motivated by the possibility that advances in artificial intelligence (AI) will give rise to AI agents that act autonomously in the economy. The economic model involves a single profit-maximizing firm which is a monopolist in the product market and a monopsonist in the labor market. The new automation technology causes the firm to replace labor with capital in such a way that its profit increases while total production decreases. The model is not intended to capture the structure of a real economy, but rather to illustrate how basic economic mechanisms can give rise to counterintuitive and undesirable outcomes., Comment: 11 pages, 3 figures
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- 2024
34. Outer Solar System spacecraft without drag-free control to probe the $\mu$Hz gravitational wave frontier
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McQuinn, Matthew and McGrath, Casey
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Astrophysics - Instrumentation and Methods for Astrophysics ,Astrophysics - High Energy Astrophysical Phenomena ,General Relativity and Quantum Cosmology - Abstract
The microhertz frequency band of gravitational waves probes the merger of supermassive black holes as well as many other gravitational wave phenomena. However, space-interferometry methods that use test masses would require substantial development of test-mass isolation systems to detect anticipated astrophysical events. We propose an approach that avoids on-board inertial test masses by situating spacecraft in the low-acceleration environment of the outer Solar System. We show that for Earth-spacecraft and inter-spacecraft distances of $\gtrsim 10\,$AU, the accelerations on the spacecraft would be sufficiently small to potentially achieve gravitational wave sensitivities determined by stochastic gravitational wave backgrounds. We further argue, for arm lengths of $10-30\,$AU and $\sim 10\,$Watt transmissions, that stable phase locks could be achieved with $20\,$cm mirrors or $5\,$m radio dishes, although for the laser case this would require lower laser frequency noise relative to the LISA lasers. We discuss designs that send both laser beams and radio waves between the spacecraft, finding that despite the $\sim10^4\times$ longer wavelengths, even a design with radio transmissions could reach stochastic background-limited sensitivities at $\lesssim 0.3\times 10^{-4}$Hz. Operating in the radio significantly reduces many spacecraft design tolerances. Our baseline concept requires two arms to do interferometry. However, if one spacecraft carries a clock with Allan deviations at $10^4$ seconds of $10^{-17}$, a comparable sensitivity could be achieved with a single arm. Finally, we discuss the feasibility of achieving similar gravitational wave sensitivities in a `Doppler tracking' configuration where the single arm is anchored to Earth., Comment: 8 figures, 25 pages + appendix
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- 2024
35. The NANOGrav 15 year Data Set: Removing pulsars one by one from the pulsar timing array
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Agazie, Gabriella, Anumarlapudi, Akash, Archibald, Anne M., Arzoumanian, Zaven, Baier, Jeremy G., Baker, Paul T., Becsy, Bence, Blecha, Laura, Brazier, Adam, Brook, Paul R., Burke-Spolaor, Sarah, Casey-Clyde, J. Andrew, Charisi, Maria, Chatterjee, Shami, Cohen, Tyler, Cordes, James M., Cornish, Neil J., Crawford, Fronefield, Cromartie, H. Thankful, Crowter, Kathryn, DeCesar, Megan E., Demorest, Paul B., Deng, Heling, Dey, Lankeswar, Dolch, Timothy, Ferrara, Elizabeth C., Fiore, William, Fonseca, Emmanuel, Freedman, Gabriel E., Gardiner, Emiko C., Garver-Daniels, Nate, Gentile, Peter A., Gersbach, Kyle A., Glaser, Joseph, Good, Deborah C., Guertin, Lydia, Gultekin, Kayhan, Hazboun, Jeffrey S., Jennings, Ross J., Johnson, Aaron D., Jones, Megan L., Kaiser, Andrew R., Kaplan, David L., Kelley, Luke Zoltan, Kerr, Matthew, Key, Joey S., Laal, Nima, Lam, Michael T., Lamb, William G., Larsen, Bjorn, Lazio, T. Joseph W., Lewandowska, Natalia, Liu, Tingting, Lorimer, Duncan R., Luo, Jing, Lynch, Ryan S., Ma, Chung-Pei, Madison, Dustin R., McEwen, Alexander, McKee, James W., McLaughlin, Maura A., McMann, Natasha, Meyers, Bradley W., Meyers, Patrick M., Middleton, Hannah, Mingarelli, Chiara M. F., Mitridate, Andrea, Moore, Christopher J., Ng, Cherry, Nice, David J., Ocker, Stella Koch, Olum, Ken D., Pennucci, Timothy T., Perera, Benetge B. P., Pol, Nihan S., Radovan, Henri A., Ransom, Scott M., Ray, Paul S., Romano, Joseph D., Runnoe, Jessie C., Saffer, Alexander, Sardesai, Shashwat C., Schmiedekamp, Ann, Schmiedekamp, Carl, Schmitz, Kai, Shapiro-Albert, Brent J., Siemens, Xavier, Simon, Joseph, Siwek, Magdalena S., Fiscella, Sophia V. Sosa, Stairs, Ingrid H., Stinebring, Daniel R., Stovall, Kevin, Susobhanan, Abhimanyu, Swiggum, Joseph K., Taylor, Stephen R., Turner, Jacob E., Unal, Caner, Vallisneri, Michele, Vecchio, Alberto, Vigeland, Sarah J., Wahl, Haley M., Witt, Caitlin A., Wright, David, and Young, Olivia
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Astrophysics - High Energy Astrophysical Phenomena ,Astrophysics - Instrumentation and Methods for Astrophysics - Abstract
Evidence has emerged for a stochastic signal correlated among 67 pulsars within the 15-year pulsar-timing data set compiled by the NANOGrav collaboration. Similar signals have been found in data from the European, Indian, Parkes, and Chinese PTAs. This signal has been interpreted as indicative of the presence of a nanohertz stochastic gravitational wave background. To explore the internal consistency of this result we investigate how the recovered signal strength changes as we remove the pulsars one by one from the data set. We calculate the signal strength using the (noise-marginalized) optimal statistic, a frequentist metric designed to measure correlated excess power in the residuals of the arrival times of the radio pulses. We identify several features emerging from this analysis that were initially unexpected. The significance of these features, however, can only be assessed by comparing the real data to synthetic data sets. After conducting identical analyses on simulated data sets, we do not find anything inconsistent with the presence of a stochastic gravitational wave background in the NANOGrav 15-year data. The methodologies developed here can offer additional tools for application to future, more sensitive data sets. While this analysis provides an internal consistency check of the NANOGrav results, it does not eliminate the necessity for additional investigations that could identify potential systematics or uncover unmodeled physical phenomena in the data., Comment: 21 pages, 11 figures, 2 tables
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- 2024
36. The NANOGrav 15 yr Data Set: Harmonic Analysis of the Pulsar Angular Correlations
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Agazie, Gabriella, Baier, Jeremy G., Baker, Paul T., Becsy, Bence, Blecha, Laura, Boddy, Kimberly K., Brazier, Adam, Brook, Paul R., Burke-Spolaor, Sarah, Burnette, Rand, Casey-Clyde, J. Andrew, Charisi, Maria, Chatterjee, Shami, Cohen, Tyler, Cordes, James M., Cornish, Neil J., Crawford, Fronefield, Cromartie, H. Thankful, DeCesar, Megan E., Demorest, Paul B., Deng, Heling, Dey, Lankeswar, Dolch, Timothy, Ferrara, Elizabeth C., Fiore, William, Fonseca, Emmanuel, Freedman, Gabriel E., Gardiner, Emiko C., Gersbach, Kyle A., Glaser, Joseph, Good, Deborah C., Gultekin, Kayhan, Hazboun, Jeffrey S., Jennings, Ross J., Johnson, Aaron D., Kaplan, David L., Kelley, Luke Zoltan, Key, Joey S., Laal, Nima, Lam, Michael T., Lamb, William G., Larsen, Bjorn, Lazio, T. Joseph W., Lewandowska, Natalia, Liu, Tingting, Luo, Jing, Lynch, Ryan S., Ma, Chung-Pei, Madison, Dustin R., McEwen, Alexander, McKee, James W., McLaughlin, Maura A., Meyers, Patrick M., Mingarelli, Chiara M. F., Mitridate, Andrea, Nay, Jonathan, Nice, David J., Ocker, Stella Koch, Olum, Ken D., Pennucci, Timothy T., Petrov, Polina, Pol, Nihan S., Radovan, Henri A., Ransom, Scott M., Ray, Paul S., Runnoe, Jessie C., Saffer, Alexander, Sardesai, Shashwat C., Schmitz, Kai, Siemens, Xavier, Simon, Joseph, Siwek, Magdalena S., Smith, Tristan L., Fiscella, Sophia V. Sosa, Stairs, Ingrid H., Stinebring, Daniel R., Susobhanan, Abhimanyu, Swiggum, Joseph K., Taylor, Jacob, Taylor, Stephen R., Turner, Jacob E., Unal, Caner, Vallisneri, Michele, van Haasteren, Rutger, Verbiest, Joris, Vigeland, Sarah J., Witt, Caitlin A., Wright, David, and Young, Olivia
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Astrophysics - High Energy Astrophysical Phenomena ,Astrophysics - Astrophysics of Galaxies ,General Relativity and Quantum Cosmology - Abstract
Pulsar timing array observations have found evidence for an isotropic gravitational wave background with the Hellings-Downs angular correlations, expected from general relativity. This interpretation hinges on the measured shape of the angular correlations, which is predominately quadrupolar under general relativity. Here we explore a more flexible parameterization: we expand the angular correlations into a sum of Legendre polynomials and use a Bayesian analysis to constrain their coefficients with the 15-year pulsar timing data set collected by the North American Nanohertz Observatory for Gravitational Waves (NANOGrav). When including Legendre polynomials with multipoles $\ell \geq 2$, we only find a significant signal in the quadrupole with an amplitude consistent with general relativity and non-zero at the $\sim 95\%$ confidence level and a Bayes factor of 200. When we include multipoles $\ell \leq 1$, the Bayes factor evidence for quadrupole correlations decreases by more than an order of magnitude due to evidence for a monopolar signal at approximately 4 nHz which has also been noted in previous analyses of the NANOGrav 15-year data. Further work needs to be done in order to better characterize the properties of this monopolar signal and its effect on the evidence for quadrupolar angular correlations., Comment: 15 pages, 6 figures
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- 2024
37. Exploring the Nature of Little Red Dots: Constraints on AGN and Stellar Contributions from PRIMER MIRI Imaging
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Leung, Gene C. K., Finkelstein, Steven L., Pérez-González, Pablo G., Morales, Alexa M., Taylor, Anthony J., Barro, Guillermo, Kocevski, Dale D., Akins, Hollis B., Carnall, Adam C., Ortiz, Óscar A. Chávez, Cleri, Nikko J., Cullen, Fergus, Donnan, Callum T., Dunlop, James S., Ellis, Richard S., Grogin, Norman A., Hirschmann, Michaela, Koekemoer, Anton M., Kokorev, Vasily, Lucas, Ray A., McLeod, Derek J., Papovich, Casey, and Yung, L. Y. Aaron
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Astrophysics - Astrophysics of Galaxies - Abstract
JWST has revealed a large population of compact, red galaxies at $z>4$ known as Little Red Dots (LRDs). We analyze the spectral energy distributions (SEDs) of 95 LRDs from the JWST PRIMER survey with complete photometric coverage from $1-18\ \mu$m using NIRCam and MIRI imaging, representing the most extensive SED analysis on a large LRD sample with long-wavelength MIRI data. We examine SED models in which either galaxy or active galactic nucleus (AGN) emission dominates the rest-frame UV or optical continuum, extracting physical properties to explore each scenario's implications. In the galaxy-only model, we find massive, dusty stellar populations alongside unobscured, low-mass components, hinting at inhomogeneous obscuration. The AGN-only model indicates dusty, luminous AGNs with low hot dust fractions compared to typical quasars. A hybrid AGN and galaxy model suggests low-mass, unobscured galaxies in the UV, with stellar mass estimates spanning $\sim$2 dex across the different models, underscoring the need for caution in interpreting LRD stellar masses. With MIRI photometry, the galaxy-only model produces stellar masses within cosmological limits, but extremely high stellar mass densities are inferred. The hybrid model infers highly overmassive black holes exceeding those in recently reported high-redshift AGNs, hinting at a partial AGN contribution to the rest-optical continuum or widespread super-Eddington accretion. Our findings highlight the extreme conditions required for both AGN or galaxy dominated scenarios in LRDs, supporting a mixed contribution to the red continuum, or novel scenarios to explain the observed emission., Comment: 22 pages, 10 figures, submitted to ApJ. Machine-readable form of Table 2 available at: https://github.com/geneckleung/lrd_primer_miri
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- 2024
38. Testing for Intrinsic Type Ia Supernova Luminosity Evolution at z>2 with JWST
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Pierel, J. D. R., Coulter, D. A., Siebert, M. R., Akins, H. B., Engesser, M., Fox, O. D., Franco, M., Rest, A., Agrawal, A., Ajay, Y., Allen, N., Casey, C. M., Decoursey, C., Drakos, N. E., Egami, E., Faisst, A. L., Gezari, S., Gozaliasl, G., Ilbert, O., Jones, D. O., Karmen, M., Kartaltepe, J. S., Koekemoer, A. M., Lane, Z. G., Larson, R. L., Li, T., Liu, D., Moriya, T. J., McCracken, H. J., Paquereau, L., Quimby, R. M., Rich, R. M., Rhodes, J., Robertson, B. E., Sanders, D. B., Shahbandeh, M., Shuntov, M., Silverman, J. D., Strolger, L. G., Toft, S., and Zenati, Y.
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Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
The James Webb Space Telescope (JWST) is opening new frontiers of transient discovery and follow-up at high-redshift. Here we present the discovery of a spectroscopically confirmed Type Ia supernova (SN Ia; SN 2023aeax) at z=2.15 with JWST, with cadenced NIRCam observations that enable multi-band light curve fitting. SN 2023aeax lands at the edge of traditional low-z cosmology color cuts because of its blue color (peak rest-frame B-V~-0.3), but we still apply a fiducial standardization approach with the BayeSN model and find that the SN 2023aeax luminosity distance measurement is in agreement (~0.1sigma) with LambdaCDM. SN 2023aeax is only the second spectroscopically confirmed SN Ia in the dark matter-dominated Universe at z>2 (the other is SN 2023adsy), giving it rare leverage to constrain any potential evolution in SN Ia standardized luminosities. Similar to SN 2023adsy (B-V~0.8), SN 2023aeax has a fairly extreme (but opposite) color, which may be due to the small sample size or a secondary factor, such as host galaxy properties. Nevertheless, the SN 2023aeax spectrum is well-represented by normal low-z SN Ia spectra and we find no definitive evolution in SN Ia standardization with redshift. Still, the first two spectroscopically confirmed z>2 SNe Ia have peculiar colors and combine for a ~1sigma distance slope relative to LambdaCDM, the implications of which require a larger sample and dedicated host galaxy observations to investigate., Comment: Submitted to ApJL. arXiv admin note: text overlap with arXiv:2406.05089
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- 2024
39. COALAS III: The ATCA CO(1-0) look at the growth and death of H$\alpha$ emitters in the Spiderweb protocluster at z=2.16
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Pérez-Martínez, J. M., Dannerbauer, H., Emonts, B. H. C., Allison, J. R., Champagne, J. B., Indermuehle, B., Norris, R. P., Serra, P., Seymour, N., Thomson, A. P., Casey, C. M., Chen, Z., Daikuhara, K., De Breuck, C., D'Eugenio, C., Drouart, G., Hatch, N., Jin, S., Kodama, T., Koyama, Y., Lehnert, M. D., Macgregor, P., Miley, G., Naufal, A., Röttgering, H., Sánchez-Portal, M., Shimakawa, R., Zhang, Y., and Ziegler, B.
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Astrophysics - Astrophysics of Galaxies - Abstract
We obtain CO(1-0) molecular gas measurements with ATCA on a sample of 43 spectroscopically confirmed H$\alpha$ emitters in the Spiderweb protocluster at $z=2.16$ and investigate the relation between their star formation and cold gas reservoirs as a function of environment. We achieve a CO(1-0) detection rate of $\sim23\pm12\%$ with 10 dual CO(1-0) and H$\alpha$ detections at $10<\log M_{*}/M_\odot<11.5$. In addition, we obtain upper limits for the remaining sources. In terms of total gas fractions ($F_{gas}$), our sample is divided into two different regimes with a steep transition at $\log M_{*}/M_\odot\approx10.5$. Galaxies below that threshold have gas fractions that in some cases are close to unity, indicating that their gas reservoir has been replenished by inflows from the cosmic web. However, objects at $\log M_{*}/M_\odot>10.5$ display significantly lower gas fractions and are dominated by AGN (12 out of 20). Stacking results yield $F_{gas}\approx0.55$ for massive emitters excluding AGN, and $F_{gas}\approx0.35$ when examining only AGN candidates. Furthermore, depletion times show that most H$\alpha$ emitters may become passive by $1
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- 2024
40. Precision or Peril: Evaluating Code Quality from Quantized Large Language Models
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Melin, Eric L., Torek, Adam J., Eisty, Nasir U., and Kennington, Casey
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Computer Science - Software Engineering - Abstract
When scaled to hundreds of billions of parameters, Large Language Models (LLMs) such as GPT-4 and LLaMA-405b have demonstrated remarkable capabilities in tasks such as code generation, code completion, and writing test cases. However, scaling up model sizes results in exponentially higher computational cost and energy consumption, leaving a large carbon footprint and making these models difficult to use by academic researchers and small businesses. Quantization has emerged as a way to mitigate the memory overhead of LLMs, allowing them to run on smaller hardware for lower prices. Quantization, however, may have detrimental effects on a model's output and it's effects on LLM generated code quality remains understudied and requires constant evaluation as LLMs are improved. This study aims to evaluate the current code generation capabilities of smaller LLMs using various metrics, exploring the impact of quantization on code quality, and identifying prevalent quality issues in the generated code. Method: We conducted a comprehensive evaluation of four smaller open-source LLMs across two benchmarks and code similarity scores. The impact of 8-bit and 4-bit quantization was analyzed, and a static analysis tool was utilized to scrutinize the generated code's quality. Our findings reveal that while the tested LLMs exhibit potential, these smaller LLMs produce code with subpar performance on established benchmarks. The effects of quantization on code quality are inconsistent, and the generated code frequently exhibits recurring quality and maintainability issues. This study underscores the necessity for careful scrutiny and validation of LLM-generated code before its adoption in software projects. While smaller LLMs can generate code, their output requires careful monitoring and validation by practitioners before integration into software projects.
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- 2024
41. EELG1002: A Record-Breaking [OIII]+H$\beta$ EW $\sim 3700$\AA~Galaxy at $z \sim 0.8$ -- Analog of Early Galaxies?
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Khostovan, Ali Ahmad, Kartaltepe, Jeyhan S., Brinch, Malte, Casey, Caitlin, Faisst, Andreas, Harish, Santosh, Gozaliasl, Ghassem, Onodera, Masato, and Yabe, Kiyoto
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Astrophysics - Astrophysics of Galaxies - Abstract
We present a detailed analysis of EELG1002: a $z = 0.8275$ EELG identified within archival Gemini/GMOS spectroscopy as part of the COSMOS Spectroscopic Archive. Combining GMOS spectra and available multi-wavelength photometry, we find EELG1002 is a low-mass ($10^{7 - 8}$ M$_\odot$), compact ($\sim 530$ pc), and bursty star-forming galaxy with mass doubling timescales of $\sim 5 - 15$ Myr. EELG1002 has record-breaking rest-frame [OIII]+H$\beta$ EW of $\sim 2800 - 3700$\AA~which is $\sim 16 - 35 \times$ higher than typical $z \sim 0.8$ [OIII] emitters with similar stellar mass and even higher than typical $z > 5$ galaxies. We find no clear evidence of an AGN suggesting the emission lines are star formation driven. EELG1002 is chemically unevolved (direct $T_e$; $12+\log_{10} (\textrm{O/H}) \sim 7.5$ consistent with $z > 5$ galaxies at fixed stellar mass) and may be undergoing a first intense, bursty star formation phase analogous to conditions expected of galaxies in the early Universe. We find evidence for a highly energetic ISM ([OIII]/[OII] $\sim 11$) and hard ionizing radiation field (elevated [NeIII]/[OII] at fixed [OIII]/[OII]). Coupled with its compact, metal-poor, and actively star-forming nature, EELG1002 is found to efficiently produce ionizing photons with $\xi_{ion} \sim 10^{25.70 - 25.75}$ erg$^{-1}$ Hz and may have $\sim 10 - 20\%$ LyC escape fraction suggesting such sources may be important reionization-era analogs. We find dynamical mass of $\sim 10^9$ M$_\odot$ suggesting copious amounts of gas to support intense star-formation activity as also suggested by analogs identified in Illustris-TNG. EELG1002 may be an ideal low-$z$ laboratory of galaxies in the early Universe and demonstrates how archival datasets can support high-$z$ science and next-generation surveys planned with \textit{Euclid} and \textit{Roman}., Comment: 27 pages, 9 Figures, 8 Tables. Submitted to ApJ. Abstract is abridged. Comments are welcomed. All code can be accessed via our github repository (https://github.com/akhostov/EELG1002)
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- 2024
42. Deep Neural Emulation of the Supermassive Black-hole Binary Population
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Laal, Nima, Taylor, Stephen R., Kelley, Luke Zoltan, Simon, Joseph, Gultekin, Kayhan, Wright, David, Becsy, Bence, Casey-Clyde, J. Andrew, Chen, Siyuan, Cingoranelli, Alexander, D'Orazio, Daniel J., Gardiner, Emiko C., Lamb, William G., Matt, Cayenne, Siwek, Magdalena S., and Wachter, Jeremy M.
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Astrophysics - Instrumentation and Methods for Astrophysics ,General Relativity and Quantum Cosmology - Abstract
While supermassive black-hole (SMBH)-binaries are not the only viable source for the low-frequency gravitational wave background (GWB) signal evidenced by the most recent pulsar timing array (PTA) data sets, they are expected to be the most likely. Thus, connecting the measured PTA GWB spectrum and the underlying physics governing the demographics and dynamics of SMBH-binaries is extremely important. Previously, Gaussian processes (GPs) and dense neural networks have been used to make such a connection by being built as conditional emulators; their input is some selected evolution or environmental SMBH-binary parameters and their output is the emulated mean and standard deviation of the GWB strain ensemble distribution over many Universes. In this paper, we use a normalizing flow (NF) emulator that is trained on the entirety of the GWB strain ensemble distribution, rather than only mean and standard deviation. As a result, we can predict strain distributions that mirror underlying simulations very closely while also capturing frequency covariances in the strain distributions as well as statistical complexities such as tails, non-Gaussianities, and multimodalities that are otherwise not learnable by existing techniques. In particular, we feature various comparisons between the NF-based emulator and the GP approach used extensively in past efforts. Our analyses conclude that the NF-based emulator not only outperforms GPs in the ease and computational cost of training but also outperforms in the fidelity of the emulated GWB strain ensemble distributions.
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- 2024
43. COSMOS2020: Disentangling the Role of Mass and Environment in Star Formation Activity of Galaxies at $0.4<z<4$
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Taamoli, Sina, Nezhad, Negin, Mobasher, Bahram, Manesh, Faezeh, Chartab, Nima, Weaver, John R., Capak, Peter L., Casey, Caitlin M., Gozaliasl, Ghassem, Heintz, Kasper E., Ilbert, Olivier, Kartaltepe, Jeyhan S., McCracken, Henry J., Sanders, David B., Scoville, Nicholas, Toft, Sune, and Watson, Darach
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Astrophysics - Astrophysics of Galaxies - Abstract
The role of internal and environmental factors in the star formation activity of galaxies is still a matter of debate, particularly at higher redshifts. Leveraging the most recent release of the COSMOS catalog, COSMOS2020, and density measurements from our previous study we disentangle the impact of environment and stellar mass on the star formation rate (SFR), and specific SFR (sSFR) of a sample of $\sim 210,000$ galaxies within redshift range $0.4< z < 4$ and present our findings in three cosmic epochs: 1) out to $z\sim 1$, the average SFR and sSFR decline at extremely dense environments and high mass end of the distribution which is mostly due to the presence of the massive quiescent population; 2) at $1
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- 2024
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44. Unveiling the Dark Side of UV/Optical Bright Galaxies: Optically Thick Dust Absorption
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Cheng, Yingjie, Giavalisco, Mauro, Backhaus, Bren E., Bhatawdekar, Rachana, Cleri, Nikko J., Costantin, Luca, Daddi, Emanuele, Dickinson, Mark, Finkelstein, Steven L., Hirschmann, Michaela, Holwerda, Benne W., Koekemoer, Anton M., Lucas, Ray A., Pacucci, Fabio, Pérez-González, Pablo G., Rodighiero, Giulia, Seillé, Lise-Marie, Whitaker, Katherine E., Yung, L. Y. Aaron, Haro, Pablo Arrabal, Bagley, Micaela B., Kartaltepe, Jeyhan S., Papovich, Casey, and Pirzkal, Nor
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Astrophysics - Astrophysics of Galaxies - Abstract
Over the past decades, a population of galaxies invisible in optical/near-infrared, but bright at longer wavelengths, have been identified through color selections. These so-called optically faint/dark galaxies are considered to be massive quiescent galaxies or highly dust-attenuated galaxies. Having the entire galaxy obscured by dust, however, is likely an extreme case of the much more common occurrence of optically thin and thick absorption coexisting in the same system. With the power of JWST imaging, we are able to spatially resolve massive galaxies at z~3, accurately model their spectral energy distributions, and identify candidate optically thick substructures. We target galaxies with log(M*/Msun)>10.3 and 2.5
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- 2024
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45. Detection and Characterisation of Giant Planets with Gaia Astrometry
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Wallace, A. L., Casey, A. R., Brown, A. G. A., and Castro-Ginard, A.
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Astrophysics - Earth and Planetary Astrophysics ,Astrophysics - Solar and Stellar Astrophysics - Abstract
Astrometric observations with Gaia are expected to play a valuable role in future exoplanet surveys. With current data from Gaia's third data release (DR3), we are sensitive to periods from less than 1 year to more than 4 years but, unlike radial velocity are not as restricted by the orbital inclination of a potential planet. The presence and potential properties of a companion affect the primary's renormalised unit weight error (RUWE) making this a valuable quantity in the search for exoplanets. Using this value and the fitted astrometric tracks from Gaia, we use Bayesian inference to constrain the mass and orbital parameters of companions in known systems. Combining this with radial velocity measurements, we show it is possible to independently measure mass and inclination and suggest HD 66141 b is a possible brown dwarf with maximum mass 23.9$^{+7.2}_{-6.4}$ M$_{\mathrm{J}}$. We show how this method may be applied to directly imaged planets in the future, using $\beta$-Pictoris c as an example but note that the host star is bright and active, making it difficult to draw clear conclusions. We show how the next Gaia data release, which will include epoch astrometry, will allow us to accurately constrain orbital parameters from astrometric data alone, revolutionising future searches for exoplanets. Combining predicted observational limits on planet mass with theoretical distributions, we estimate the probability that a star with a given RUWE will host a detectable planet, which will be highly valuable in planning future surveys., Comment: 11 pages, 15 figures
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- 2024
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46. Renaissance: Investigating the Pretraining of Vision-Language Encoders
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Fields, Clayton and Kennington, Casey
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Computer Science - Computer Vision and Pattern Recognition ,Computer Science - Artificial Intelligence ,Computer Science - Computation and Language ,Computer Science - Machine Learning - Abstract
In the past several years there has been an explosion of available models for vision-language tasks. Unfortunately, the literature still leaves open a number of questions related to best practices in designing and training such models. In this paper we seek to answer several questions related to the pretraining of vision-language encoders through meta-analysis. In our first set of experiments, we show that we can save significant compute at no cost to downstream performance, by freezing large parts of vision-language models during pretraining. In our second set of experiments we examine the effect of basing a VL transformer on a vision model versus a text model. Additionally, we introduce a VL modeling platform called Renaissance that we use to conduct all of the experiments. This program offers a great deal of flexibility in creating, training and evaluating transformer encoders for VL modeling. The source code for Renaissance can be found at https://github.com/bsu-slim/renaissance.
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- 2024
47. Galaxy Tomography with the Gravitational Wave Background from Supermassive Black Hole Binaries
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Chen, Yifan, Daniel, Matthias, D'Orazio, Daniel J., Mitridate, Andrea, Sagunski, Laura, Xue, Xiao, Agazie, Gabriella, Baier, Jeremy G., Baker, Paul T., Bécsy, Bence, Blecha, Laura, Brazier, Adam, Brook, Paul R., Burke-Spolaor, Sarah, Burnette, Rand, Casey-Clyde, J. Andrew, Charisi, Maria, Chatterjee, Shami, Cohen, Tyler, Cordes, James M., Cornish, Neil J., Crawford, Fronefield, Cromartie, H. Thankful, DeCesar, Megan E., Demorest, Paul B., Deng, Heling, Dey, Lankeswar, Dolch, Timothy, Ferrara, Elizabeth C., Fiore, William, Fonseca, Emmanuel, Freedman, Gabriel E., Gardiner, Emiko C., Gersbach, Kyle A., Glaser, Joseph, Good, Deborah C., Gültekin, Kayhan, Hazboun, Jeffrey S., Jennings, Ross J., Johnson, Aaron D., Kaplan, David L., Kelley, Luke Zoltan, Key, Joey S., Laal, Nima, Lam, Michael T., Lamb, William G., Larsen, Bjorn, Lazio, T. Joseph W., Lewandowska, Natalia, Liu, Tingting, Luo, Jing, Lynch, Ryan S., Ma, Chung-Pei, Madison, Dustin R., McEwen, Alexander, McKee, James W., McLaughlin, Maura A., Meyers, Patrick M., Mingarelli, Chiara M. F., Nice, David J., Ocker, Stella Koch, Olum, Ken D., Pennucci, Timothy T., Petrov, Polina, Pol, Nihan S., Radovan, Henri A., Ransom, Scott M., Ray, Paul S., Romano, Joseph D., Runnoe, Jessie C., Saffer, Alexander, Sardesai, Shashwat C., Schmitz, Kai, Siemens, Xavier, Simon, Joseph, Siwek, Magdalena S., Fiscella, Sophia V. Sosa, Stairs, Ingrid H., Stinebring, Daniel R., Susobhanan, Abhimanyu, Swiggum, Joseph K., Taylor, Jacob, Taylor, Stephen R., Turner, Jacob E., Unal, Caner, Vallisneri, Michele, van Haasteren, Rutger, Verbiest, Joris, Vigeland, Sarah J., Witt, Caitlin A., Wright, David, and Young, Olivia
- Subjects
Astrophysics - High Energy Astrophysical Phenomena ,Astrophysics - Cosmology and Nongalactic Astrophysics ,Astrophysics - Astrophysics of Galaxies ,General Relativity and Quantum Cosmology ,High Energy Physics - Phenomenology - Abstract
The detection of a stochastic gravitational wave background by pulsar timing arrays suggests the presence of a supermassive black hole binary population. Although the observed spectrum generally aligns with predictions from orbital evolution driven by gravitational wave emission in circular orbits, there is a discernible preference for a turnover at the lowest observed frequencies. This turnover could indicate a significant hardening phase, transitioning from early environmental influences to later stages predominantly influenced by gravitational wave emission. In the vicinity of these binaries, the ejection of stars or dark matter particles through gravitational three-body slingshots efficiently extracts orbital energy, leading to a low-frequency turnover in the spectrum. By analyzing the NANOGrav 15-year data, we assess how the gravitational wave spectrum depends on the initial inner galactic profile prior to disruption by binary ejections, accounting for a range of initial binary eccentricities. Our findings suggest a parsec-scale galactic center density around $10^6\,M_\odot/\textrm{pc}^3$ across most of the parameter space, offering insights into the environmental effects on black hole evolution and combined matter density near galaxy centers., Comment: 15 pages, 5 figures
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- 2024
48. Optimal Allocation of Pauli Measurements for Low-rank Quantum State Tomography
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Qin, Zhen, Jameson, Casey, Gong, Zhexuan, Wakin, Michael B., and Zhu, Zhihui
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Quantum Physics ,Electrical Engineering and Systems Science - Signal Processing ,Mathematics - Optimization and Control - Abstract
The process of reconstructing quantum states from experimental measurements, accomplished through quantum state tomography (QST), plays a crucial role in verifying and benchmarking quantum devices. A key challenge of QST is to find out how the accuracy of the reconstruction depends on the number of state copies used in the measurements. When multiple measurement settings are used, the total number of state copies is determined by multiplying the number of measurement settings with the number of repeated measurements for each setting. Due to statistical noise intrinsic to quantum measurements, a large number of repeated measurements is often used in practice. However, recent studies have shown that even with single-sample measurements--where only one measurement sample is obtained for each measurement setting--high accuracy QST can still be achieved with a sufficiently large number of different measurement settings. In this paper, we establish a theoretical understanding of the trade-off between the number of measurement settings and the number of repeated measurements per setting in QST. Our focus is primarily on low-rank density matrix recovery using Pauli measurements. We delve into the global landscape underlying the low-rank QST problem and demonstrate that the joint consideration of measurement settings and repeated measurements ensures a bounded recovery error for all second-order critical points, to which optimization algorithms tend to converge. This finding suggests the advantage of minimizing the number of repeated measurements per setting when the total number of state copies is held fixed. Additionally, we prove that the Wirtinger gradient descent algorithm can converge to the region of second-order critical points with a linear convergence rate. We have also performed numerical experiments to support our theoretical findings.
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- 2024
49. The FENIKS Survey: Stellar-Halo Mass Relationship of Central and Satellite Galaxies in UDS and COSMOS at 0.2 < z < 4.5
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Zaidi, Kumail, Wake, David A., Marchesini, Danilo, Iyer, Kartheik, Muzzin, Adam, Papovich, Casey, Antwi-Danso, Jacqueline, Glazebrook, Karl, and Labbé, Ivo
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Astrophysics - Astrophysics of Galaxies - Abstract
We present a comprehensive analysis of the observed Stellar-to-Halo mass relationship (SHMR) spanning redshifts from 0.2 to 4.5. This was enabled through galaxy clustering and abundance measurements from two large (effective area ~ 1.61 deg^2) and homogeneously prepared photometric catalogs - UltraVISTA ultra-deep stripes DR3 (COSMOS) and FENIKS v1 (UDS). To translate these measurements into the SHMR, we introduce a novel halo occupation distribution (HOD) fitting approach (``smooth-$z$'') whereby HOD parameters between neighboring z-bins are connected via physically motivated continuity (smoothing) priors. As a result, the high constraining power at z <~ 2, due to a much wider dynamical range in stellar mass (~ 3 dex), helps constrain the SHMR at z >~ 2, where that range shrinks down to <~ 1 dex. We find that the halo mass is tightly coupled to star formation: the halo mass with peak integrated star-forming efficiency (SFE), M_h^peak remains constant within ~ 10^12.2 - 10^12.4 Msolar throughout the redshifts probed. Furthermore, we show that if we had relied on COSMOS alone (as opposed to COSMOS+UDS), as has been done by many preceding studies, M_h^peak would be systematically lower by up to ~0.15 dex at z < 1.5, highlighting the importance of mitigating cosmic variance. Finally, for the first time, we show how the SFE evolves with redshift as halos grow in mass along their progenitor merger trees, instead of at fixed halo masses., Comment: Submitted to ApJ. 36 pages, 18 figures. Comments welcome
- Published
- 2024
50. MAUVE: An Ultraviolet Astrophysics Probe Mission Concept
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Balakrishnan, Mayura, Bowens, Rory, Aguirre, Fernando Cruz, Hughes, Kaeli, Jayaraman, Rahul, Kuhn, Emily, Louden, Emma, Louie, Dana R., McBride, Keith, McGrath, Casey, Payne, Jacob, Presser, Tyler, Reding, Joshua S., Rickman, Emily, Scrandis, Rachel, Symons, Teresa, Wiser, Lindsey, Jahoda, Keith, Kataria, Tiffany, Nash, Alfred, and X, Team
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Astrophysics - Instrumentation and Methods for Astrophysics ,Astrophysics - Earth and Planetary Astrophysics ,Astrophysics - Astrophysics of Galaxies ,Astrophysics - High Energy Astrophysical Phenomena - Abstract
We present the mission concept "Mission to Analyze the UltraViolet universE" (MAUVE), a wide-field spectrometer and imager conceived during the inaugural NASA Astrophysics Mission Design School. MAUVE responds to the 2023 Announcement of Opportunity for Probe-class missions, with a budget cap of \$1 billion, and would hypothetically launch in 2031. However, the formulation of MAUVE was an educational exercise and the mission is not being developed further. The Principal Investigator-led science of MAUVE aligns with the priorities outlined in the 2020 Astrophysics Decadal Survey, enabling new characterizations of exoplanet atmospheres, the early-time light curves of some of the universe's most explosive transients, and the poorly-understood extragalactic background light. Because the Principal Investigator science occupies 30% of the observing time available during the mission's 5 yr lifespan, we provide an observing plan that would allow for 70% of the observing time to be used for General Observer programs, with community-solicited proposals. The onboard detector (THISTLE) claims significant heritage from the Space Telescope Imaging Spectrograph on Hubble, but extends its wavelength range down to the extreme UV. We note that MAUVE would be the first satellite in decades with the ability to access this regime of the electromagnetic spectrum. MAUVE has a field of view of 900" x 900" a photometric sensitivity extending to $m_{UV}\leq 24$, and a resolving power of $R\sim1000$. This paper provides full science and mission traceability matrices for this concept, and also outlines cost and scheduling timelines aimed at enabling a within-budget mission and an on-time launch., Comment: 21 pages, 15 figures. Published by the Publications of the Astronomical Society of the Pacific
- Published
- 2024
- Full Text
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