نتایج جستجو برای: near work
تعداد نتایج: 1182455 فیلتر نتایج به سال:
طی بررسی هائی که جهت جمع آوری و شناسائی فون کنه های بادام در استان چهار محال و بختیاری در سال های 88-1387 انجام شد مجموعا، 23 گونه متعلق به 18 جنس و 8 خانواده جمع آوری و شناسائی شد که 2 گونه برای اولین بار از ایران معرفی گردید که با (*) مشخص شد، و تعداد 3 گونه برای اولین بار در دنیا شناسائی و توصیف گردید که با علامت (**) مشخص شده اند. لیست گونه های گزارش شده بر اساس طبقه بندی راسته و خانواده ب...
In previous work we consideredM -theory five branes wrapped on elliptic Calabi-Yau threefold near the smooth part of the discriminant curve. In this paper, we extend that work to compute the light states on the worldvolume of five-branes wrapped on fibers near certain singular loci of the discriminant. We regulate the singular behavior near these loci by deforming the discriminant curve and exp...
Occupational noise frequently occurs in the work environment in military intelligence, surveillance, and reconnaissance operations. This impacts cognitive performance by acting as a stressor, potentially interfering with the analysts' decision-making process. We investigated the effects of different noise stimuli on analysts' performance and workload in anomaly detection by simulating a noisy w...
In an experimental study two levels of oculomotor load were induced via optical trial lenses. Trapezius muscle activity was measured with bipolar surface electromyography and normalized to a submaximal contraction. Sixty-six subjects with a median age of 36 (range 19-47, std 8) viewed a black and white Gabor grating (5 c/deg) for two 7-min periods monocularly through a 0 D lens or binocularly t...
PURPOSE To examine the associations of near work related parameters with spherical equivalent refraction and axial length in Chinese children. METHODS A total of 1770 grade 7 students with mean age of 12.7 years were examined with cycloplegic autorefraction and axial length. Questions were asked regarding time spent in near work and outdoors per day, and near work related parameters. RESULT...
Night-shift workers are at high risk of drowsiness-related motor vehicle crashes as a result of circadian disruption and sleep restriction. However, the impact of actual night-shift work on measures of drowsiness and driving performance while operating a real motor vehicle remains unknown. Sixteen night-shift workers completed two 2-h daytime driving sessions on a closed driving track at the Li...
Frequent use of digital information technology has an impact on eye- and neck/shoulder-discomfort. Studies with cross sectional and intervention design indicate an association between the two symptom categories. Still, whether visually demanding near work, per se, contributes to increased neck/shoulder discomfort remains a question of debate. The aim of this laboratory study was to assess if vi...
This paper presents the design and analysis of a near linear-work parallel algorithm for solving symmetric diagonally dominant (SDD) linear systems. On input of a SDD n-by-n matrix A with m nonzero entries and a vector b, our algorithm computes a vector x̃ such that ‖x̃−Ab‖A ≤ ε · ‖Ab‖A in O(m log n log 1ε ) work and O(m log 1 ε ) depth for any fixed θ > 0. The algorithm relies on a parallel algo...
To investigate whether or not peripheral retinal defocus contributes to the refractive development of myopia by influencing the overall accommodative function. The steady-state accommodative stimulus response curve (ASRC) and the near-work induced transient myopia (NITM) after a near visual task were compared between different visual field conditions in emmetropes (EMMs), stable myopes (SMs) an...
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