Bounding Infection Prevalence by Bounding Selectivity and Accuracy of Tests: With Application to Early COVID-19

Nutrition and Infection with COVID-19

‏‎a comparative study of language learning strategies employmed by bilinguals and monolinguals with reference to attitudes and motivation‎‏

هدف از این تحقیق بررسی برخی عوامل ادراکی واحساسی یعنی استفاده از شیوه های یادگیری زبان ، انگیزه ها ونگرش نسبت به زبان انگلیسی در رابطه با زمینه زبانی زبان آموزان می باشد. هدف بررسی این نکته بود که آیا اختلافی چشمگیر میان زبان آموزان دو زبانه و تک زبانه در میزان استفاده از شیوه های یادگیری زبان ، انگیزه ها نگرش و سطح مهارت زبانی وجود دارد. همچنین سعی شد تا بهترین و موثرترین عوامل پیش بینی کننده ...

COVID-19 infection leading to lethal spondylodiscitis with spinal abscess

Background: Secondary complications after SARS-CoV-2 virus infection including cardiovascular and neurological pose additional morbidity and mortality. Till date there no single case report of spondylodiscitis with spinal abscess after CVOID-19 infection. Case Description: A 71- year-old man presented with tachypnea and cough since 24 hours. He was febrile and the CT-chest showed typical pictu...

On Passive Quadrupedal Bounding with Flexible Linear Torso

This paper studies the effect of flexible linear torso on the dynamics of passive quadruped bounding. A reduced-order passive and conservative model with linear flexible torso and springy legs is introduced. The model features extensive spine deformation during high-speed bounding, resembling those observed in a cheetah. Fixed points corresponding to cyclic bounding motions are found and calcul...

Optimization by Variational Bounding

We discuss a general technique that forms a differentiable bound on non-differentiable objective functions by bounding the function optimum by its expectation with respect to a parametric variational distribution. We describe sufficient conditions for the bound to be convex with respect to the variational parameters. As example applications we consider variants of sparse linear regression and S...