User profiles for Ahmad Zaheen

Zaheen Farraz Ahmad

PhD Candidate, University of Alberta
Verified email at ualberta.ca
Cited by 122

Motivation in a MOOC: A probabilistic analysis of online learners' basic psychological needs

TL Durksen, MW Chu, ZF Ahmad, AI Radil… - Social Psychology of …, 2016 - Springer
Self-determination theory (SDT) is one of the most well-known approaches to achievement
motivation. However, the three basic psychological needs of SDT have not received …

AID constrains germinal center size by rendering B cells susceptible to apoptosis

A Zaheen, B Boulianne, JY Parsa… - Blood, The Journal …, 2009 - ashpublications.org
The germinal center (GC) is a transient lymphoid tissue microenvironment that fosters T cell–dependent
humoral immunity. Within the GC, the B cell–specific enzyme, activation-induced …

The RNF8/RNF168 ubiquitin ligase cascade facilitates class switch recombination

…, S Panier, S Roa, A Zaheen… - Proceedings of the …, 2010 - National Acad Sciences
An effective immune response requires B cells to produce several classes of antibodies
through the process of class switch recombination (CSR). Activation-induced cytidine …

[HTML][HTML] Negative supercoiling creates single-stranded patches of DNA that are substrates for aid–mediated mutagenesis

JY Parsa, S Ramachandran, A Zaheen, RM Nepal… - PLoS …, 2012 - journals.plos.org
Antibody diversification necessitates targeted mutation of regions within the immunoglobulin
locus by activation-induced cytidine deaminase (AID). While AID is known to act on single-…

Tuberculosis in 2020-new approaches to a continuing global health crisis

A Zaheen, BR Bloom - The New England journal of …, 2020 - pubmed.ncbi.nlm.nih.gov
Ahmad Zaheen

[HTML][HTML] Cost-effectiveness analysis of treatment with non-curative or palliative intent for hepatocellular carcinoma in the real-world setting

HH Thein, Y Qiao, A Zaheen, N Jembere… - PloS one, 2017 - journals.plos.org
Hepatocellular carcinoma (HCC) presentation is heterogeneous necessitating a variety of
therapeutic interventions with varying efficacies and associated prognoses. Poor prognostic …

[HTML][HTML] Improved survival in patients with viral hepatitis-induced hepatocellular carcinoma undergoing recommended abdominal ultrasound surveillance in Ontario: a …

HH Thein, MA Campitelli, LT Yeung, A Zaheen… - PLoS …, 2015 - journals.plos.org
The optimal schedule for ultrasonographic surveillance of patients with viral hepatitis for the
detection of hepatocellular carcinoma (HCC) remains unclear owing to a lack of reliable …

High-dimensional reinforcement learning for optimization and control of ultracold quantum gases

…, T Ooi, A Czarnecka, ZF Ahmad… - Machine Learning …, 2023 - iopscience.iop.org
Abstract Machine-learning (ML) techniques are emerging as a valuable tool in experimental
physics, and among them, reinforcement learning (RL) offers the potential to control high-…

Monte carlo tree search with iteratively refining state abstractions

S Sokota, CY Ho, Z Ahmad… - Advances in Neural …, 2021 - proceedings.neurips.cc
Decision-time planning is the process of constructing a transient, local policy with the intent
of using it to make the immediate decision. Monte Carlo tree search (MCTS), which has been …

[HTML][HTML] The effect of HIV-hepatitis C co-infection on bone mineral density and fracture: a meta-analysis

TJ O'Neill, L Rivera, V Struchkov, A Zaheen… - PLoS One, 2014 - journals.plos.org
Objective There is a variable body of evidence on adverse bone outcomes in HIV patients co-infected
with hepatitis C virus (HCV). We examined the association of HIV/HCV co-infection …