Results 11 to 20 of about 73 (71)

Scalar Field Evolution at Background and Perturbation Levels for a Broad Class of Potentials

Fortschritte der Physik, Volume 71, Issue 10-11, November 2023., 2023
Abstract In this paper, a non‐interacting scalar field cosmology with an arbitrary potential using the f‐deviser method that relies on the differentiability properties of the potential is investigated. Using this alternative mathematical approach, a unified dynamical system analysis at a scalar field's background and perturbation levels with arbitrary ...
Genly Leon, Saikat Chakraborty, Sayantan Ghosh, Raja Solanki, P.K. Sahoo, Esteban González   +5 more
wiley   +1 more source

A brief history of image sensors in the optical

Astronomische Nachrichten, Volume 344, Issue 8-9, October-November 2023., 2023
Image sensors, most notably the Charge Coupled Device (CCD), have revolutionized observational astronomy as perhaps the most important innovation after photography. Since the 50th anniversary of the invention of the CCD has passed in 2019, it is time to review the development of detectors for the visible wavelength range, starting with the discovery of
Martin M. Roth
wiley   +1 more source

Updated COVID‐19 clearance time among patients with cancer in the Delta and Omicron waves

Cancer Medicine, Volume 12, Issue 16, Page 16869-16875, August 2023., 2023
Abstract Background COVID‐19 infection delays therapy and in‐person evaluation for oncology patients, but clinic clearance criteria are not clearly defined. Methods We conducted a retrospective review of oncology patients with COVID‐19 at a tertiary care center during the Delta and Omicron waves and compared clearance strategies.
Zachary M. Avigan, Rodrigo Paredes, Leora S. Boussi, Barbara D. Lam, Meghan E. Shea, Matthew J. Weinstock, Mary Linton B. Peters   +6 more
wiley   +1 more source

Clinical characteristics of COVID‐19 patients infected by the Omicron variants in Macao, China: A cross‐sectional study

Health Science Reports, Volume 6, Issue 7, July 2023., 2023
Abstract Background and Aims The evolving mutants of SARS‐CoV‐2 have made the COVID‐19 pandemic sustained for over 3 years. In 2022, BA.4 and BA.5 were the Omicron variants dominating the spread globally. Although COVID‐19 was no longer a Public Health Emergency of International Concern (PHEIC) as announced by WHO, the SARS‐CoV‐2 variants remain a ...
Hou Hon Cheong, Fong I Sio, Chi Chung Chan, Seong In Neng, Ip Pio Sam, Teng Cheang, Weng Ieong Tou, Hong San Lei, Tan Fong Cheong, Edmundo Patricio Lopes Lao, Tak Hong Cheong, Cheong U Kuok, Iek Long Lo   +12 more
wiley   +1 more source

Standardization of SARS‐CoV‐2 Nucleic Acid Amplification Techniques by Calibration and Quantification to the First WHO International Standard for SARS‐CoV‐2 RNA

International Journal of Microbiology, Volume 2023, Issue 1, 2023., 2023
Clinical decision‐making regarding isolation of SARS‐CoV‐2 patients is usually based on semiquantitative cycle‐threshold (Ct) values without standardization. However, not all molecular assays produce Ct values, and there is ongoing discussion about whether Ct values can be safely used for decision‐making.
Jolanda J. C. Voermans, Daphne G. J. C. Mulders, Rob J. J. Beerkens, Marlize van Duijn, Liesbeth van der Zwaan, Janette Rahamat-Langendoen, Annemiek van der Eijk, Marion P. G. Koopmans, Richard Molenkamp, Faham Khamesipour   +9 more
wiley   +1 more source

De novo emergence of SARS‐CoV‐2 spike mutations in immunosuppressed patients

Transplant Infectious Disease, Volume 24, Issue 6, December 2022., 2022
Abstract Background The continuing evolution of severe acute respiratory syndrome coronavirus 2 (SARS‐CoV‐2) variants with decreased susceptibility to neutralizing antibodies is of clinical importance. Several spike mutations associated with immune escape have evolved independently in association with different variants of concern (VOCs).
Lacy M. Simons, Egon A. Ozer, Stephanie Gambut, Taylor J. Dean, Li Zhang, Pavan Bhimalli, Jeffrey R. Schneider, João I. Mamede, Michael G. Ison, Reem Karmali, Leo I. Gordon, Ramon Lorenzo‐Redondo, Judd F. Hultquist   +12 more
wiley   +1 more source

Liver steatosis and fibrosis in people with human immunodeficiency virus in West Africa and the relationship with hepatitis B virus coinfection

Hepatology Communications, Volume 6, Issue 11, Page 3036-3051, November 2022., 2022
We determined the prevalence of both liver steatosis and liver fibrosis in a HIV cohort in Ghana using a portable FibroScan, and we interpreted the data within a broad context, including measurements that are not part of routine HIV care in Kumasi. We identified two main reasons for concern: (1) metabolic syndrome was common and a predictor of liver ...
Giovanni Villa, Dorcas Owusu, Colette Smith, Marilyn Azumah, Adam Abdullahi, Suzannah Phillips, Laila Sayeed, Harrison Austin, David Chadwick, Richard Odame Phillips, Anna Maria Geretti   +10 more
wiley   +1 more source

Clinical efficacy and in vitro neutralization capacity of monoclonal antibodies for severe acute respiratory syndrome coronavirus 2 delta and omicron variants

Journal of Medical Virology, Volume 94, Issue 10, Page 5038-5043, October 2022., 2022
Abstract We aimed to provide in vitro data on the neutralization capacity of different monoclonal antibody (mAb) preparations against the severe acute respiratory syndrome coronavirus 2 (SARS‐CoV‐2) delta and omicron variant, respectively, and describe the in vivo RNA kinetics of coronavirus disease 2019 (COVID‐19) patients treated with the respective ...
Thomas Theo Brehm, Susanne Pfefferle, Ronald von Possel, Mario Karolyi, Alexander Zoufaly, Dominic Wichmann, Robin Kobbe, Petra Emmerich, Dominik Nörz, Martin Aepfelbacher, Julian Schulze zur Wiesch, Marylyn M. Addo, Stefan Schmiedel, Marc Lütgehetmann   +13 more
wiley   +1 more source

Stopping and restarting PrEP and loss to follow‐up among PrEP‐taking men who have sex with men and transgender women at risk of HIV‐1 participating in a prospective cohort study in Kenya

HIV Medicine, Volume 23, Issue 7, Page 750-763, August 2022., 2022
Abstract Objective To assess frequency and predictors of switching between being on and off PrEP and being lost to follow‐up (LTFU) among men who have sex with men (MSM) and transgender women (TGW) with access to PrEP services in Sub‐Saharan Africa. Methods This was a prospective cohort study of MSM and TGW from coastal Kenya who initiated daily oral ...
Elizabeth Wahome, Anders Boyd, Alexander N. Thiong’o, Khamisi Mohamed, Tony Oduor, Evans Gichuru, John Mwambi, Elise van der Elst, Susan M. Graham, Maria Prins, Eduard J. Sanders   +10 more
wiley   +1 more source

Interpersonal therapy versus antidepressant medication for treatment of postpartum depression and anxiety among women with HIV in Zambia: a randomized feasibility trial

Journal of the International AIDS Society, Volume 25, Issue 7, July 2022., 2022
Abstract Introduction Postpartum depression (PPD) is a prevalent and debilitating disease that may affect medication adherence and thus maternal health and vertical transmission among women with HIV. We assessed the feasibility of a trial of interpersonal psychotherapy (IPT) versus antidepressant medication (ADM) to treat PPD and/or anxiety among ...
M. Bridget Spelke, Ravi Paul, Bryan S. Blette, Samantha Meltzer‐Brody, Crystal E. Schiller, J. M. Ncheka, Margaret P. Kasaro, Joan T. Price, Jeffrey S. A. Stringer, Elizabeth M. Stringer   +9 more
wiley   +1 more source