10 results on '"Christopher Powell"'
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2. Radical Complexity
- Author
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Christopher Powell
- Subjects
Social Sciences ,Socialism. Communism. Anarchism ,HX1-970.7 - Abstract
Abolishing alienated labour requires the radical democratization of economic production. Complex systems theory offers tools for theorizing how this radical democracy could be constructed. In complex systems theory, the same structures and transformations appear across multiple domains in the physical and life sciences. Evolution is one such concept. Rather than being linear and gradual, evolution is a nonlinear process in which stable equilibria are punctuated by bursts of catastrophic change. Even catastrophic change, however, happens through an incremental process: the production of new forms through new combinations of existing forms. Each evolutionary permutation of a system is a step into its space of adjacent possibilities. The task of revolutionary theory can be conceptualized as that of plotting a course through capitalism’s adjacent possibility space, bringing the system to a benign catastrophe that triggers a phase transition into socialism. The complexity of this mapping requires a distributed processing approach to theorizing that prefigures the distributed processing, or socialist general intellect, that must characterize any radically democratic worker control of production. This project suggest the expansion of a new role for professional intellectuals: that of tool makers, developing conceptual materials that feed a recursive process of the construction of socialist networks.
- Published
- 2023
3. Journey to the other side of the brain: asymmetry in patients with chronic mild or moderate traumatic brain injury
- Author
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David E Ross, John D Seabaugh, Jan M Seabaugh, Claudia Alvarez, Laura Peyton Ellis, Christopher Powell, Christopher Reese, Leah Cooper, Katherine Shepherd, and for the Alzheimer's Disease Neuroimaging Initiative
- Subjects
asymmetry ,MRI ,NeuroGage® ,NeuroQuant® ,traumatic brain injury (TBI) ,volumetry ,Medical emergencies. Critical care. Intensive care. First aid ,RC86-88.9 - Abstract
Aim: Patients with chronic mild or moderate traumatic brain injury have some regions of brain atrophy (including cerebral white matter) but even more regions of abnormal brain enlargement (including other cerebral regions). Hypothesis: Ipsilateral injury and atrophy cause the eventual development of contralateral compensatory hypertrophy. Materials & methods: 50 patients with mild or moderate traumatic brain injury were compared to 80 normal controls (n = 80) with respect to MRI brain volume asymmetry. Asymmetry-based correlations were used to test the primary hypothesis. Results: The group of patients had multiple regions of abnormal asymmetry. Conclusion: The correlational analyses supported the conclusion that acute injury to ipsilateral cerebral white matter regions caused atrophy, leading eventually to abnormal enlargement of contralateral regions due to compensatory hypertrophy.
- Published
- 2023
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4. Efficacy and safety of a single dose of casirivimab and imdevimab for the prevention of COVID-19 over an 8-month period: a randomised, double-blind, placebo-controlled trial
- Author
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Gary A Herman, Meagan P O'Brien, Eduardo Forleo-Neto, Neena Sarkar, Flonza Isa, Peijie Hou, Kuo-Chen Chan, Katharine J Bar, Ruanne V Barnabas, Dan H Barouch, Myron S Cohen, Christopher B Hurt, Dale R Burwen, Mary A Marovich, Bret J Musser, John D Davis, Kenneth C Turner, Adnan Mahmood, Andrea T Hooper, Jennifer D Hamilton, Janie Parrino, Danise Subramaniam, Alina Baum, Christos A Kyratsous, A Thomas DiCioccio, Neil Stahl, Ned Braunstein, George D Yancopoulos, David M Weinreich, Achint Chani, Adebiyi Adepoju, Aisha Mortagy, Ajla Dupljak, Alison Brown, Amy Froment, Andrea Hooper, Andrea Margiotta, Andrew Bombardier, Anita Islam, Anne Smith, Arvinder Dhillon, Audra McMillian, Aurora Breazna, Ayesha Aslam, Barabara Carpentino, Bari Kowal, Barry Siliverstein, Benjamin Horel, Bo Zhu, Bret Musser, Brian Bush, Brian Head, Brian Snow, Bryan Zhu, Camille Debray, Careta Phillips, Carmella Simiele, Carol Lee, Carolyn Nienstedt, Caryn Trbovic, Casey (Kuo-Chen) Chan, Catherine Elliott, Chad Fish, Charlie Ni, Christa Polidori, Christine Enciso, Christopher Caira, Christopher Powell, Christos A. Kyratsous, Cliff Baum, Colin McDonald, Cynthia Leigh, Cynthia Pan, Dana Wolken, Danielle Manganello, David Liu, David Stein, David M. Weinreich, Dawlat Hassan, Daya Gulabani, Deborah Fix, Deborah Leonard, Deepshree Sarda, Denise Bonhomme, Denise Kennedy, Devin Darcy, Dhanalakshmi Barron, Diana Hughes, Diana Rofail, Dipinder Kaur, Divya Ramesh, Dona Bianco, Donna Cohen, Edward Jean-Baptiste, Ehsan Bukhari, Eileen Doyle, Elizabeth Bucknam, Emily Labriola-Tomkins, Emily Nanna, Esther Huffman O'Keefe, Evelyn Gasparino, Evonne Fung, Fung-Yee To, Gary Herman, George D. Yancopoulos, Georgia Bellingham, Giane Sumner, Grainne Moggan, Grainne Power, Haixia Zeng, Hazel Mariveles, Heath Gonzalez, Helen Kang, Hibo Noor, Ian Minns, Ingeborg Heirman, Izabella Peszek, James Donohue, Jamie Rusconi, Janice Austin, Jeannie Yo, Jenna McDonnell, Jennifer D. Hamilton, Jessica Boarder, Jianguo Wei, Jingchun Yu, Joanne Malia, Joanne Tucciarone, Jodie Tyler-Gale, John D. Davis, John Strein, Jonathan Cohen, Jonathan Meyer, Jordan Ursino, Joseph Im, Joseph Tramaglini, Joseph Wolken, Kaitlyn Potter, Kaitlyn Scacalossi, Kamala Naidu, Karen Browning, Karen Rutkowski, Karen Yau, Katherine Woloshin, Kelly Lewis-Amezcua, Kenneth Turner, Kimberly Dornheim, Kit Chiu, Kosalai Mohan, Kristina McGuire, Kristy Macci, Kurt Ringleben, Kusha Mohammadi, Kyle Foster, Latora Knighton, Leah Lipsich, Lindsay Darling, Lisa Boersma, Lisa Cowen, Lisa Hersh, Lisa Jackson, Lisa Purcell, Lisa Sherpinsky, Livia Lai, Lori Faria, Lori Geissler, Louise Boppert, Lyra Fiske, Marc Dickens, Marco Mancini, Maria C. Leigh, Meagan P. O'Brien, Michael Batchelder, Michael Klinger, Michael Partridge, Michel Tarabocchia, Michelle Wong, Mivianisse Rodriguez, Moetaz Albizem, Muriel O'Byrne, Nicole Deitz, Nicole Memblatt, Nirav Shah, Nitin Kumar, Olga Herrera, Oluchi Adedoyin, Ori Yellin, Pamela Snodgrass, Patrick Floody, Paul D'Ambrosio, Paul (Xiaobang) Gao, Philippa Hearld, Qin Li, Rachel Kitchenoff, Rakiyya Ali, Ramya Iyer, Ravikanth Chava, Rinol Alaj, Rita Pedraza, Robert Hamlin, Romana Hosain, Ruchin Gorawala, Ryan White, Ryan Yu, Rylee Fogarty, S. Balachandra Dass, Sagarika Bollini, Samit Ganguly, Sandra DeCicco, Sanket Patel, Sarah Cassimaty, Selin Somersan-Karakaya, Shane McCarthy, Sharon Henkel, Shazia Ali, Shelley Geila Shapiro, Somang Kim, Soraya Nossoughi, Stephanie Bisulco, Steven Elkin, Steven Long, Sumathi Sivapalasingam, Susan Irvin, Susan Wilt, Tami Min, Tatiana Constant, Theresa Devins, Thomas DiCioccio, Thomas Norton, Travis Bernardo, Tzu-Chien Chuang, Victor (Jianguo) Wei, Vinh Nuce, Vishnu Battini, Wilson Caldwell, Xiaobang Gao, Xin Chen, Yanmei Tian, Yasmin Khan, Yuming Zhao, Yunji Kim, Bonnie Dye, Christopher B. Hurt, Dale R. Burwen, Dan H. Barouch, David Burns, Elizabeth Brown, Katharine J. Bar, Mary Marovich, Meredith Clement, Myron S. Cohen, Nirupama Sista, Ruanne V. Barnabas, and Sheryl Zwerski
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COVID-19 Vaccines ,Infectious Diseases ,Double-Blind Method ,Pharmaceutical Preparations ,SARS-CoV-2 ,COVID-19 ,Humans ,Antibodies, Monoclonal, Humanized - Abstract
There is an unmet need for COVID-19 prevention in patient populations who have not mounted or are not expected to mount an adequate immune response to complete COVID-19 vaccination. We previously reported that a single subcutaneous 1200 mg dose of the monoclonal antibody combination casirivimab and imdevimab (CAS + IMD) prevented symptomatic SARS-CoV-2 infections by 81·4% in generally healthy household contacts of SARS-CoV-2-infected individuals over a 1-month efficacy assessment period. Here we present additional results, including the 7-month follow-up period (months 2-8), providing additional insights about the potential for efficacy in pre-exposure prophylaxis settings.This was a randomised, double-blind, placebo-controlled trial done in the USA, Romania, and Moldova in 2020-2021, before the emergence of omicron (B.1.1.529) and omicron-lineage variants. Uninfected and unvaccinated household contacts of infected individuals, judged by the investigator to be in good health, were randomly assigned (1:1) to receive 1200 mg CAS + IMD or placebo by subcutaneous injection according to a central randomisation scheme provided by an interactive web response system; randomisation was stratified per site by the test results of a local diagnostic assay for SARS-CoV-2 and age group at baseline. COVID-19 vaccines were prohibited before randomisation, but participants were allowed to receive COVID-19 vaccination during the follow-up period. Participants who developed COVID-19 symptoms during the follow-up period underwent RT-PCR testing. Prespecified endpoints included the proportion of previously uninfected and baseline-seronegative participants (seronegative-modified full analysis set) who had RT-PCR-confirmed COVID-19 in the follow-up period (post-hoc for the timepoints of months 2-5 and 6-8 only) and underwent seroconversion (ie, became seropositive, considered a proxy for any SARS-CoV-2 infections [symptomatic and asymptomatic]; prespecified up to day 57, post-hoc for all timepoints thereafter). We also assessed the incidence of treatment-emergent adverse events. This study is registered with ClinicalTrials.gov, NCT04452318.From July 13, 2020, to Oct 4, 2021, 2317 participants who were RT-PCR-negative for SARS-CoV-2 were randomly assigned, of whom 1683 (841 assigned to CAS + IMD and 842 assigned to placebo) were seronegative at baseline. During the entirety of the 8-month study, CAS + IMD reduced the risk of COVID-19 by 81·2% (nominal plt;0·0001) versus placebo (prespecified analysis). During the 7-month follow-up period, protection was greatest during months 2-5, with a 100% relative risk reduction in COVID-19 (nominal plt;0·0001; post-hoc analysis). Efficacy waned during months 6-8 (post-hoc analysis). Seroconversion occurred in 38 (4·5%) of 841 participants in the CAS + IMD group and in 181 (21·5%) of 842 in the placebo group during the 8-month study (79·0% relative risk reduction vs placebo; nominal plt;0·0001). Six participants in the placebo group were hospitalised due to COVID-19 versus none who received CAS + IMD. Serious treatment-emergent adverse events (including COVID-19) were reported in 24 (1·7%) of 1439 participants receiving CAS + IMD and in 23 (1·6%) of 1428 receiving placebo. Five deaths were reported, none of which were due to COVID-19 or related to the study drugs.CAS + IMD is not authorised in any US region as of Jan 24, 2022, because data show that CAS + IMD is not active against omicron-lineage variants. In this study, done before the emergence of omicron-lineage variants, a single subcutaneous 1200 mg dose of CAS + IMD protected against COVID-19 for up to 5 months of community exposure to susceptible strains of SARS-CoV-2 in the pre-exposure prophylaxis setting, in addition to the post-exposure prophylaxis setting that was previously shown.Regeneron Pharmaceuticals, F Hoffmann-La Roche, US National Institute of Allergy and Infectious Diseases, US National Institutes of Health.
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- 2022
5. Multiphase Flow Analysis Using Piezoelectric Leaf-Cell Sensor Array
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Dwight Swett and Christopher Powell
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Electrical and Electronic Engineering ,Instrumentation - Published
- 2022
6. The Association Between Pornography Consumption and Perceived Realism in Adolescents: A Meta-analysis
- Author
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Adam Gunnoo and Christopher Powell
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Cultural Studies ,Gender Studies - Abstract
Pornography is more accessible than ever before, which raises questions concerning its influence on adolescent sexual behaviours. Recent research has identified perceived realism of pornography—the extent to which an individual perceives pornographic content as being congruent with reality—to be a potentially significant individual difference variable in this domain. However, the strength of this relationship remains uncertain. Focus is placed on this association for adolescents as sexual curiosity and maturing sexual scripts may be more readily influenced by pornography. The present study addressed this association through a meta-analysis. Database searches identified k = 5 studies (N = 3846) from various countries with relevant associations.The meta-analysis indicated a significant, moderate, and positive relationship between frequency of pornography consumption and perceived realism (r = .39) which was not moderated by the sex of participants. Given these findings, future research may assess behavioural and attitudinal changes associated with pornography use. Findings could also inform novel approaches to sexual education that prioritise recontextualising programs in the context of technology and explore the role of digital sexual socialisation of adolescents.
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- 2023
7. Book Review/Compte Rendu : Casper, Monica J. and Eric Wertheimer, eds. Critical Trauma Studies: Understanding Violence, Conflict, and Memory in Everyday Life. New York: New York University Press. 2016. 293 pp. $30.00 paper (9781479822515)
- Author
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Christopher Powell
- Abstract
[First para.]: "Psychological trauma can be defined, roughly, as the effect of an experience which the mind is unable to process, assimilate, and assign to the past. A traumatizing experience, therefore, is defined not by its intrinsic properties but by the mind’s response to it (Herman, 2001). Critical trauma studies takes this anti-essentialist insight one step further by examining how social relations and cultural meanings produce trauma, in two ways. First, relations of denigration and oppression entail traumatizing experiences for individuals and groups — through class, race, gender, sexuality, and so on. Second, the concept of trauma is, itself, socially constructed and performative."
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- 2023
8. Geometry of biquadratic and cyclic cubic log-unit lattices
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Christopher Powell, Shahed Sharif, and Fernando Azpeitia Tellez
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Algebra and Number Theory ,Mathematics - Number Theory ,High Energy Physics::Lattice ,010102 general mathematics ,Geometry ,010103 numerical & computational mathematics ,Extension (predicate logic) ,Algebraic number field ,Equilateral triangle ,01 natural sciences ,Ring of integers ,Dirichlet distribution ,symbols.namesake ,11H06, 11R27 ,Lattice (order) ,FOS: Mathematics ,symbols ,Embedding ,Number Theory (math.NT) ,0101 mathematics ,Unit (ring theory) ,Mathematics - Abstract
By Dirichlet's Unit Theorem, under the log embedding the units in the ring of integers of a number field form a lattice, called the log-unit lattice. We investigate the geometry of these lattices when the number field is a biquadratic or cyclic cubic extension of $\mathbb{Q}$. In the biquadratic case, we determine when the log-unit lattice is orthogonal. In the cyclic cubic case, we show that the log-unit lattice is always equilateral triangular., Comment: 14 pages
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- 2021
9. Evaluation of erosion potential of bio-based multicomponent blendstocks using experimentally-validated computational fluid dynamics
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Gina Magnotti and Christopher Powell
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- 2022
10. Environmental Microbial Evolution
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Christopher Powell
- Published
- 2022
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