نتایج جستجو برای: passive sampling
تعداد نتایج: 280672 فیلتر نتایج به سال:
Aim The island species–area relationship (ISAR) quantifies how the number of species increases as area an or island-like habitat gets larger and is one most general patterns in ecology. However, studies that measure ISAR often confound variation sampling methodology analyses, precluding appropriate syntheses its underlying mechanisms. Most use only presence–absence data at whole-island scale, w...
background & aim : ventilator associated pneumonia (vap) is the most common infections in critical care units, which leads to more length of hospital stay, costs, and high mortality. therefore, prevention is a priority according to clinical guidelines. the aim of this study is determine the effects of passive versus active implementation of vap guidelines on nurses’ performance in critical care...
In this study a new passive, large particle impactor (PLPI) (PM<10) was developed and evaluated in a wind tunnel. The PLPI is designed to be isoaxial and isokinetic to enable large particles sampling without bias. The PLPI can provide representative sampling without requiring a mass flowmeter controller or pump. The PLPI is especially useful for aerosol wind tunnel studies to evaluate particle ...
Reports about standardized and repeatable experimental procedures investigating supraspinal activation in patients with gait disorders are scarce in current neuro-imaging literature. Well-designed and executed tasks are important to gain insight into the effects of gait-rehabilitation on sensorimotor centers of the brain. The present study aims to demonstrate the feasibility of a novel imaging ...
Pollution from highway stormwater runoff has been an increasing area of concern. Many structural Best Management Practices (BMPs) have been implemented for stormwater treatment and management. One challenge for these BMPs is to sample stormwater and monitor BMP performance. The main objective of this study was to evaluate the feasibility of using polyurethane foam (PUF) passive samplers (PSs) f...
Improving methods for assessing the spatial and temporal resolution of organic compound concentrations in marine environments is important to the sustainable management of our coastal systems. Here we evaluate the use of ethylene vinyl acetate (EVA) as a candidate polymer for thin-film passive sampling in waters of marine environments. Log K(EVA-W) partition coefficients correlate well (r(2) = ...
Passive sampling devices have been used since the 1970s to measure time-weighted average (TWA) or equilibrium concentrations of pollutants in various environmental matrices (e.g. air, soils and sediments and water). In recent years the popularity of using such samplers has increased and the technology in now well established for the measurement of atmospheric pollutants. This sector has a long ...
Kinematic loop-closure constraints significantly increase the difficulty of motion planning for articulated mechanisms. Configurations of closed-chain mechanisms do not form a single manifold, easy to parameterize, as the configurations of open kinematic chains. In general, they are grouped into several subsets with complex topology than cannot be globally parameterized. This paper presents a g...
We explored the feasibility of collecting convalescent plasma for passive immunotherapy of Middle East respiratory syndrome coronavirus (MERS-CoV) infection by using ELISA to screen serum samples from 443 potential plasma donors: 196 patients with suspected or laboratory-confirmed MERS-CoV infection, 230 healthcare workers, and 17 household contacts exposed to MERS-CoV. ELISA-reactive samples w...
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