Analytic plenoptic camera diffraction model and radial distortion analysis due to vignetting.

Using a mathematical approach, this paper presents a generalization of semi-analytical expressions for the point spread function (PSF) of plenoptic cameras. The model is applicable in the standard regime of the scalar diffraction theory while the extension to arbitrary main lens transmission functions generalizes a priori formalism. The accuracy and applicability of the model is well verified against the exact Rayleigh-Sommerfeld diffraction integral and a rigorous proof of convergence for the PSF series expression is made.

"Struggle against Bitter Life": Lived Experience of Iranian Nurses with HIV/AIDS.

The impact of HIV/AIDS on the healthcare system in many countries, particularly in developing countries is significant. Due to the high prevalence of HIV/AIDS in these countries, remarkable number of nurses have contracted HIV through their work. HIV/AIDS poses a major threat to people's physical and emotional health status as well as their social well-being and it has overwhelming effects on personal and social lives of HIV-positive people.

M100 ExaData: a data collection campaign on the CINECA's Marconi100 Tier-0 supercomputer.

Supercomputers are the most powerful computing machines available to society. They play a central role in economic, industrial, and societal development. While they are used by scientists, engineers, decision-makers, and data-analyst to computationally solve complex problems, supercomputers and their hosting datacenters are themselves complex power-hungry systems.

The association of the spiritual health and psychological well-being of teachers with their organizational commitment.

Background: In line with the significance of organizational commitment, the question arises "Do spiritual health and psychological well-being optimize teachers' organizational commitment?" The purpose of this study was to determine the relationship between spiritual health, psychological well-being and the organizational commitment of high school teachers.

Methods: This was a cross-sectional study in which, 346 teachers in Tehran high schools participated through multi-stage sampling. The data were collected using Ryff Psychological Well-being Questionnaire (1989), Spiritual Health Questionnaire in Iranian Society (2014) and Organizational Commitment scale of Allen and Meyer (1990), and their relationships were assessed.

The efficacy of corticosteroids therapy in patients with moderate to severe SARS-CoV-2 infection: a multicenter, randomized, open-label trial.

Background: We performed a multicenter, randomized open-label trial in patients with moderate to severe Covid-19 treated with a range of possible treatment regimens.

Methods: Patients were randomly assigned to one of three regimen groups at a ratio of 1:1:1. The primary outcome of this study was admission to the intensive care unit.