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1,002 results on '"Connolly, Thomas"'

12. O$|$R$|$P$|$E -- A Data Semantics Driven Concurrency Control

Author

Lessner, Tim, Laux, Fritz, and Connolly, Thomas M

Subjects
Computer Science - Databases
Abstract

This paper presents a concurrency control mechanism that does not follow a 'one concurrency control mechanism fits all needs' strategy. With the presented mechanism a transaction runs under several concurrency control mechanisms and the appropriate one is chosen based on the accessed data. For this purpose, the data is divided into four classes based on its access type and usage (semantics). Class $O$ (the optimistic class) implements a first-committer-wins strategy, class $R$ (the reconciliation class) implements a first-n-committers-win strategy, class $P$ (the pessimistic class) implements a first-reader-wins strategy, and class $E$ (the escrow class) implements a first-n-readers-win strategy. Accordingly, the model is called \PeFS. The selected concurrency control mechanism may be automatically adapted at run-time according to the current load or a known usage profile. This run-time adaptation allows \Pe to balance the commit rate and the response time even under changing conditions. \Pe outperforms the Snapshot Isolation concurrency control in terms of response time by a factor of approximately 4.5 under heavy transactional load (4000 concurrent transactions). As consequence, the degree of concurrency is 3.2 times higher., Comment: 20 pages, 7 tables, 15 figures

Published
2023

13. Title Page

Author

Aikens, C. Melvin, Connolly, Thomas J., and Jenkins, Dennis L.

Published
2011

15. Cover

Author

Aikens, C. Melvin, Connolly, Thomas J., and Jenkins, Dennis L.

Published
2011

23. Index

Author

Aikens, C. Melvin, Connolly, Thomas J., and Jenkins, Dennis L.

Published
2011

24. References

Author

Aikens, C. Melvin, Connolly, Thomas J., and Jenkins, Dennis L.

Published
2011

25. Dispersive Non-reciprocity between a Qubit and a Cavity

Author

Wang, Ying-Ying, Wang, Yu-Xin, van Geldern, Sean, Connolly, Thomas, Clerk, Aashish A., and Wang, Chen

Subjects
Quantum Physics
Abstract

The dispersive interaction between a qubit and a cavity is ubiquitous in circuit and cavity quantum electrodynamics. It describes the frequency shift of one quantum mode in response to excitations in the other, and in closed systems is necessarily bidirectional, i.e.~reciprocal. Here, we present an experimental study of a non-reciprocal dispersive-type interaction between a transmon qubit and a superconducting cavity, arising from a common coupling to dissipative intermediary modes with broken time reversal symmetry. We characterize the qubit-cavity dynamics, including asymmetric frequency pulls and photon shot-noise dephasing, under varying degrees of non-reciprocity by tuning the magnetic field bias of a ferrite component in situ. Furthermore, we show that the qubit-cavity dynamics is well-described in a wide parameter regime by a simple non-reciprocal master-equation model, which provides a compact description of the non-reciprocal interaction without requiring a full understanding of the complex dynamics of the intermediary system. Our result provides an example of quantum non-reciprocal phenomena beyond the typical paradigms of non-Hermitian Hamiltonians and cascaded systems., Comment: 10+9 pages, 7+12 figures

Published
2023

26. Coexistence of nonequilibrium density and equilibrium energy distribution of quasiparticles in a superconducting qubit

Author

Connolly, Thomas, Kurilovich, Pavel D., Diamond, Spencer, Nho, Heekun, Bøttcher, Charlotte G. L., Glazman, Leonid I., Fatemi, Valla, and Devoret, Michel H.

Subjects
Quantum Physics, Condensed Matter - Mesoscale and Nanoscale Physics
Abstract

The density of quasiparticles typically observed in superconducting qubits exceeds the value expected in equilibrium by many orders of magnitude. Can this out-of-equilibrium quasiparticle density still possess an energy distribution in equilibrium with the phonon bath? Here, we answer this question affirmatively by measuring the thermal activation of charge-parity switching in a transmon qubit with a difference in superconducting gap on the two sides of the Josephson junction. We then demonstrate how the gap asymmetry of the device can be exploited to manipulate its parity., Comment: Updated acknowledgements, corrected typos

Published
2023
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27. Distinguishing parity-switching mechanisms in a superconducting qubit

Author

Diamond, Spencer, Fatemi, Valla, Hays, Max, Nho, Heekun, Kurilovich, Pavel D., Connolly, Thomas, Joshi, Vidul R., Serniak, Kyle, Frunzio, Luigi, Glazman, Leonid I., and Devoret, Michel H.

Subjects
Quantum Physics, Condensed Matter - Mesoscale and Nanoscale Physics
Abstract

Single-charge tunneling is a decoherence mechanism affecting superconducting qubits, yet the origin of excess quasiparticle excitations (QPs) responsible for this tunneling in superconducting devices is not fully understood. We measure the flux dependence of charge-parity (or simply, ``parity'') switching in an offset-charge-sensitive transmon qubit to identify the contributions of photon-assisted parity switching and QP generation to the overall parity-switching rate. The parity-switching rate exhibits a qubit-state-dependent peak in the flux dependence, indicating a cold distribution of excess QPs which are predominantly trapped in the low-gap film of the device. Moreover, we find that the photon-assisted process contributes significantly to both parity switching and the generation of excess QPs by fitting to a model that self-consistently incorporates photon-assisted parity switching as well as inter-film QP dynamics.

Published
2022
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28. Characterisation of older patients that require, but do not undergo, emergency laparotomy: a multicentre cohort study

Author

Shearer, Rosalyn, Mekhail, Peter, Ramsay, George, Nessa, Ashrafun, Iqbal, Rizwan, Maskell, Perry, Majeed, Mudassar, Dai, Nick, Bhojwani, Deepika, Anyomih, Theophilus, Lunevicius, Raimundas, Elkalbash, Rema, Shahzad, Khalid, Ahmed, Salma, Gahunia, Sukhpreet, Hopley, Philip, Nair, Dheepa, Reddington, Anne, Wilson, Jeremy, Lovett, Bryony, Iqbal, Muhammad Rafaih, Ramadan, Wafaa, Affify, Emma, Khan, Fatima, Tan, Silvian, Dawson, Joy, Eltarhoni, Khadiga, Young, Jamie, Lockwood, Sonia, Yiasemidou, Marina, Orchard, Melanie, Orchard, Phillipa, Randall, Jonathan, Barrow, Hannah, Dixon, Steve, Eardley, Nicola, Rajput, Kunal, Santoro, Giovanni, Mason, Sabrina, Bagnall, Nigel Mark, Kourdouli, Amar, Rajain, Sakshi, Curley, Daniel, Chandima Halahakoon, Vijitha, Thrikandiyur, Anu, Worsfold, James, Chouari, Tarak, Dent, Paul, Zhao, Sarah, Belgaumkar, Ajay, Maher, Sarah, Oyewole, Bankole, Weller, Sam, Davis, Mark, Fox, Katherine, Burton, Sarah, Iosif, Evangelia, Tobbal, Muhammed, Abdelkarim, Mostafa, Duvnjak, Haris, Morgan, Richard, Murali, Sreedutt, Murji, Bhaven, Venkatesan, Gowtham, Boardley, Rachael, Carson, Daniel, Galbraith, Norman, MacTier, Mhairi, Mailley, Keir, Meney, Laura, Persson, Pia, Stevenson, Richard, Haigh, Andrew, Kelly, Diane, Mellor, Samantha, Niaz, Muhammad Adnan, Peter, Mark, Smith, Douglas, Perin, Giordano, Hanbali, Nabih, Blackwell, James, Daliya, Prita, Herrod, Philip, Jibreel, Mohammed, Malcolm, Francesca, Photiou, Dana, Al-Khaddar, Ziad, Amir, Farhat, Bughio, Mumtaz, Gardiner, Felicity, Joyce, Nikki, Kennedy-Dalby, Andrew, Khan, Usman, McCoy, Sharon, Smart, Christopher J., Ward, Simon, Abdelsaid, Kirolos, AbdulAal, Yasser, Berski, Michael, Jayasankar, Balaji, Sandhu, Banher, Akhteruzzaman, Tahiyyah, Chan, Shirley, Dickson-Lowe, Richard, Kocsis, Anna Maria, Allen, Rhian, Bateman, Kellie, Shovelton, Charmaine, Smyth, Edward, Taylor, Daniel, Tennant, Anna, Chang, Jessica, Dowdeswell, Megan, Karri, Santosh, Neophytou, Chris, Yassin, Nuha, Bibi, Saira, Ulain, Noor, Evans, Luke, Cross, Katie, Fakhrul-aldeen, Mohammed, Jones, Stacey, Sarveswaran, Janahan, Aljarad, Feras, Collins, Amy, Eves, Joshua, Patel, Maleene, Sharieff, Imran, Smith, Emma, Treus, Estefania, McGuigan, Mari-Claire, Nicholoson, Gary, Pickering, Stacey, Husain, Najam, Narayanasamy, Sangara, Pradeep, Thomas, Rajebhosale, Ramprasad, Ravi, Prabhu, Elabbassy, Islam, Hao, Juen, Mak, Richard, Oliphant, Raymond, Powezka, Katarzyna, Asaad, Peter, Downs, Karen, Hylton, Jackie, Jalali, Uzma, Math, Suraj, Kourounis, Georgios, Mcilveen, Erin, Ng, Hwei Jene, Pope, Oscar, Argyropoulos, Susannah, Faulkner, Gemma, Spurring, Eleanor, Anis, Fady, Javanmard-Emamghissi, Hannah, Lee, Rachel, Redfern, Victoria, Saravanan, Nivetha, Tierney, Gill, Cullen, William, Kantola, Venla, Massey, Lisa, Orabi, Amira, Park, Linda, Rajaretnam, Niroshini, Smart, Neil, Ambler, Olivia, Damaskos, Dimitrios, Ewing, Anne, Mehta, Maithili, Skipworth, Richard, Alagaratnam, Swethan, Chowdhury, Shihad, Gupta, Aayush, Jones, Gareth, Mohamed, Guleed, Varcarda, Massimo, Abdel-dayem, Mahmoud, Mazumdar, Eshan, Miller, Bethany, Shah, Parin, Gupta, Sapna, Hawkings, Nancy, Herbert, Geraint, Indika, Kalhar, Mallison, Georgia, Smith, Laurie, Tolley, Thomas, Williams, Gethin, Burton, Keira, Cavallaro, Davide, Henry, Jayde, Parkin, Edward, Redfern, Jennifer, Sekhar, Hema, Murray, Hannah, Redman, Amelia, Thompson, Dolapo, Thornton, Sophie, Blake, Natalie, Mcleod, Ross, Pressler, Marc, Read, Howard, Shehata, Zak, Thomas, Michael, Walker, Cerys, Brown, Steven, Daniels, Sarah, Hawkins, Debby, Steele, Caroline, Berry, David, Dimitrova, Nora, Massella, Virginia, Mathew, Priya, Patel, Rikhilroy, Bakewell, Zoe, Collins, Alma, Fowler, George, Lawday, Samuel, McCarthy, Kathryn, Sheldon, James, Papakonstantinou, Dimitrios, Cox, Kofi, Kenington, Cleo, Mitchell, Robert, Thrumurthy, Sri, Clifford, Rachael, Kalaiselvan, Ramya, Leptidis, Ioannis, Connolly, Thomas, Evans, William, Kumar, Anil, Malik, Isfand, Nulty, Callula, Rai, Sajal, Brown, Ashley, Chew, Misha, Okpala, Amalachukwu, Tan, Yanyu, Magee, Cathy, Rossborough, Catherine, Manda, Vijay, McColl, Gillian, Norton, William, Ray, Christopher, Abdelrahman, Byrne, Clare, Caddick, Virginia, Ghanem, Ahmed, Marchese, Salvatore, Patel, Sabina, Singh, Kaushiki, Smith, Eleanor, Zarog, Mohamed, Caswell, Jack, Lukaszewicz, Alex, Manson, David, McKnight, Gerard, Duncan, Trish, Brown, Leo, Lam Chan, Deona Mei, Robertson, John, Al-Aqaileh, Ahmad, Chandratreya, Nitya, El-qudah, Jazal, Philip, Ken, Ben Hmida, Rami, Chohda, Ezzat, Gilbert, Kayleigh, Alqallaf, Addullah, Kamarizan, Mohamad, Ben Sassi, Abozed, Amin, Mohamed, Lim, Michael, Longbotham, David, Moussa, Ahmed, Sheridan, Kelda, Wilkins, Alex, Carter, Ben, Hewitt, Jonathan, Price, Angeline, McLennan, Elizabeth, Knight, Stephen R., Reeves, Nicola, Chandler, Susan, Boyle, Jemma, Pearce, Lyndsay, and Moug, Susan J.

Published
2024
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29. A low-loss ferrite circulator as a tunable chiral quantum system

Author

Wang, Ying-Ying, van Geldern, Sean, Connolly, Thomas, Wang, Yu-Xin, Shilcusky, Alexander, McDonald, Alexander, Clerk, Aashish A., and Wang, Chen

Subjects
Quantum Physics, Condensed Matter - Materials Science
Abstract

Ferrite microwave circulators allow one to control the directional flow of microwave signals and noise, and thus play a crucial role in present-day superconducting quantum technology. They are typically viewed as a black-box, and their internal structure is not specified, let alone used as a resource. In this work, we demonstrate a low-loss waveguide circulator constructed with single-crystalline yttrium iron garnet (YIG) in a 3D cavity, and analyze it as a multi-mode hybrid quantum system with coupled photonic and magnonic excitations. We show the coherent coupling of its chiral internal modes with integrated superconducting niobium cavities, and how this enables tunable non-reciprocal interactions between the intra-cavity photons. We also probe experimentally the effective non-Hermitian dynamics of this system and its effective non-reciprocal eigenmodes. The device platform provides a test bed for implementing non-reciprocal interactions in open-system circuit QED., Comment: 8 pages of main text, 8 figures

Published
2021

33. Learning Analytics in Higher Education Development: A Roadmap

Author

Adejo, Olugbenga and Connolly, Thomas

Abstract

The increase in education data and advance in technology are bringing about enhanced teaching and learning methodology. The emerging field of Learning Analytics (LA) continues to seek ways to improve the different methods of gathering, analysing, managing and presenting learners' data with the sole aim of using it to improve the student learning experience and the study environment. In this paper, we try to explore the concept and salient features of LA potential in higher education and suggest strategies on how this emerging field can make use of data mining techniques alongside learners' data to produce useful and informed decision making. Using the Technology-Organisation-Human frameworks, the paper investigates the roadmap for successful implementation of LA in higher Educational Institutions.

Published
2017

39. Gamifying Teacher Training: Simulated Practice Learning for Future and Practising Teachers Interacting with Vulnerable Learners

Author

Connolly, Thomas, Tsvetkova, Nina, Hristova, Plama, Ifenthaler, Dirk, Series Editor, Warren, Scott Joseph, Series Editor, Bellotti, Francesco, Editorial Board Member, DeVane, Benjamin, Editorial Board Member, Loh, Christian Sebastian, Editorial Board Member, Squire, Kurt, Editorial Board Member, and Bradley, Elizabeth, editor

Published
2020
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46. Mad Dogs are Englishmen? Imperialism and Homicide in Somerset Maugham’s “The Outstation”.

Author

Connolly, Thomas F.

Subjects
*POWER (Social sciences), *HOMICIDE, *IMPERIALISM, *SOCIAL conflict, *DOGS, *MALAYS (Asian people), *SELF-consciousness (Awareness), BRITISH colonies
Abstract

In Maugham’s short story “The Outstation”, Warburton, the Resident in a remote sector of Borneo reifies Anderson’s imagined community. Warburton is lord of the realm but has an encompassing lack of self-awareness complemented by superhuman self-control. Maugham’s story is a dense web of class and race conflict. The protagonist, Warburton, and the antagonist, Cooper, his lower-class assistant, are locked in a struggle that chisels away the façade of Empire and offers a perspective on authority that requires more than an essentialist reading of identity. Warburton admires the Malays and is proud of the regard with which he is held in the colony, not by his confreres, but by the Malays. Cooper despises both the Malays and Warburton. Warburton and Cooper play out a deadly game of “power and privilege” that fronts post-colonial concepts of identity and authority. [ABSTRACT FROM AUTHOR]

Published
2024
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47. Cordage and Netting from The Paisley Caves: Plant Materials, Technology, and Cultural Indicators.

Author

KALLENBACH, ELIZABETH and CONNOLLY, THOMAS J.

Abstract

Excavations at the Paisley Caves between 2002 and 2011 recovered a significant and diverse assemblage of well-preserved textiles, including approximately 300 specimens of fine and coarse cordage. In this study, plant taxa, chronology, and cordage technology are explored to identify possible correlations between plant selection and cordage manufacture over time. As expected, there is preference for using bark and monocot stems for rope and most medium cordage, and softer bast fibers for fine cord. Results also indicate dogbane is the primary source of fiber in the construction of fine cordage, followed by stinging nettle. A change in fine cord technology during the Early Holocene supports previous arguments of cultural change after 9,000 years ago. Additional plant fibers, including flax, milkweed, and cotton present during the last 1,000years, and a more diverse textile assemblage overall, suggest expanded social contacts with groups farther south and east. [ABSTRACT FROM AUTHOR]

Published
2024

48. Analyses of Household Artifacts from Rattlesnake Cave (35LK1295), A Site in the Chewaucan Basin of Southeast Oregon

Author

 Connolly,  Thomas J.,  Jew,  Nicholas P.,  Swisher,  Mark E.,  Cannon,  William J.,  Sullivan,  Kelsey J., and  Waller,  Michel

Subjects
ethnography, ethnohistory, archaeology, native peoples, Great Basin
Abstract

Rattlesnake Cave is located on the western shore of Lake Abert in the northern Great Basin of southeast Oregon, one of hundreds of archaeological sites in the Lake Abert/Chewaucan Basin. The site was dug by collectors in the 1950s, and recovered materials were donated to the Fort Rock Valley Historical Society and Homestead Museum in the early 1990s. We analyze 77 artifacts in the assemblage, which includes cordage, basketry, moccasins, as well as wood, bone, and stone tools. We report new radiocarbon (14C) dates for the site, and the results of energy dispersive x-ray fluorescence (EDXRF) on one basalt and nine obsidian bifaces, matching their chemical signatures to regional geologic sources. We discuss the place of Rattlesnake Cave in the broader context of the northern Great Basin while demonstrating how museum collections may contribute to addressing anthropological research questions.

Published
2016

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