نتایج جستجو برای: safety threshold
تعداد نتایج: 382282 فیلتر نتایج به سال:
The first step in improving traffic safety is identifying hazardous situations. Based on traffic accidents’ data, identifying hazardous situations in roads and the network is possible. However, in small areas such as intersections, especially in maneuvers resolution, identifying hazardous situations is impossible using accident’s data. In this paper, time-to-collision (TTC) as a traffic conflic...
some applications are critical and must designed Fault Tolerant System. Usually Voting Algorithm is one of the principle elements of a Fault Tolerant System. Two kinds of voting algorithm are used in most applications, they are majority voting algorithm and weighted average algorithm these algorithms have some problems. Majority confronts with the problem of threshold limits and voter of weight...
some applications are critical and must designed Fault Tolerant System. Usually Voting Algorithm is one of the principle elements of a Fault Tolerant System. Two kinds of voting algorithm are used in most applications, they are majority voting algorithm and weighted average algorithm these algorithms have some problems. Majority confronts with the problem of threshold limits and voter of weight...
This paper develops a Failure Mode, Effects and Criticality Analysis (FMECA) for heating, ventilation air conditioning (HVAC) system in railway. HVAC is safety critical which must ensure emergency case of fire loss primary functions. A study the HVAC's areas mandatory to optimize its reliability availability consequently guarantee low operation maintenance cost. The first part describes FMECA p...
Electrical stimulation threshold and retinal ganglion cell density were measured in a rat model of retinal degeneration. We performed in vivo electrophysiology and morphometric analysis on normal and S334ter line 3 (RD) rats (ages 84-782 days). We stimulated the retina in anesthetized animals and recorded evoked responses in the superior colliculus. Current pulses were delivered with a platinum...
OBJECTIVE We evaluate variants of a commonly used data safety monitoring guideline in clinical trials in multiple sclerosis (MS) that flags patients who, at a follow-up visit, have 5 or more contrast-enhancing lesions (CELs) above their baseline count. METHODS We apply the guideline to a relapsing cohort and a secondary progressive cohort. We assess the number of patients that meet the guidel...
Early performance of a miniaturized leadless cardiac pacemaker: the Micra Transcatheter Pacing Study
AIMS Permanent cardiac pacing is the only effective treatment for symptomatic bradycardia, but complications associated with conventional transvenous pacing systems are commonly related to the pacing lead and pocket. We describe the early performance of a novel self-contained miniaturized pacemaker. METHODS AND RESULTS Patients having Class I or II indication for VVI pacing underwent implanta...
The threshold and non-threshold, the Benchmark dose, a probabilistic method and categorical regression are introduced as quantitative methods used for food and diet safety assessment (FDSA). Statistical challenges are identified and origins of uncertainties in FDSA are addressed such as the quality of data bases, the choice of the response variable, the doseresponse (DR) model and the role of m...
background : exposure to formaldehyde (fa) causes irritative effects and induces nasopharyngeal cancer; the international agency for research on cancer (iarc, lyon) classified fa as carcinogenic to humans, group 1. many studies have been published so far concerning the occupational exposure of industrial workers, embalmers, pathologists and anatomists to fa but very few data regarding medical ...
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