نتایج جستجو برای: sampling height
تعداد نتایج: 309808 فیلتر نتایج به سال:
Gravity-based heights require gravity values at levelled benchmarks (BMs), which sometimes have to be predicted from surrounding observations. We use EGM2008 and the Australian National Gravity Database (ANGD) as examples of model and terrestrial observed data respectively to predict gravity at Australian national levelling network (ANLN) BMs. The aim is to quantify errors that may propagate in...
—Predictive models of aboveground biomass of nonnative Tamarix ramosissima of various sizes were developed using destructive sampling techniques on 50 individuals and four 100-m2 plots. Each sample was measured for average height (m) of stems and canopy area (m2) prior to cutting, drying, and weighing. Five competing regression models (P < 0.05) were developed to estimate aboveground biomass of...
BACKGROUND The prevalence of short stature (SS) and underweight in Jordan on a national level is unknown. This study aimed to investigate, on a national level, the prevalence of short stature (SS), underweight, overweight, and obesity among school aged children in Jordan. METHODS This cross-sectional study was conducted from May 2015 to January 2016 and included 2702 subjects aged 6-17 years....
Radioactivity in the atmosphere originates from natural radioactive decay, cosmogenic production, nuclear weapons testing and nuclear accidents. Results of the measurements have shown that cosmogenic 7Be is the only gamma emitting nuclide found in the atmosphere of Iran (1). 7Be (t1/2 = 53d) is one of the radioactive products of the bombardment of the atmosphere by cosmic rays. About 75% of 7Be...
In order to improve disinfection by-product (DBP) exposure assessment, this study was designed to document both water and air levels of these chemical contaminants in two indoor swimming pools and to analyze their within-day and day-to-day variations in both of them. Intensive sampling was carried out during two one-week campaigns to measure trihalomethanes (THMs) and chloramines (CAMs) in wate...
A supporting stand to suspend rotating impactors and mosquito cages is a requirement for field tests during pesticide efficacy trials. We present schematics for a collection device and associated support system for sampling droplets of ultra-low-volume (ULV) sprays during mosquito adulticide applications. This system offers the advantages of cost efficiency, increased ease of deployment, off-se...
Fugitive road dust collection for chemical analysis and interpretation has been limited by the quantity and representativeness of samples. Traditional methods of fugitive dust collection generally focus on point-collections that limit data interpretation to a small area or require the investigator to make gross assumptions about the origin of the sample collected. These collection methods often...
OBJECTIVE As it is now known that primary aldosteronism (PA) is more prevalent than was previously recognized, and is a potentially curable cause of hypertension and related cardiovascular diseases, the search for a safe and effective means of its diagnosis has reemerged as a topic of interest. Adrenal venous sampling is the gold standard for diagnosis of PA, but the technique is challenging an...
STUDY OBJECTIVE The aim was to determine whether the mean body mass index of young adults in England and Scotland had increased during the years 1973 to 1988. DESIGN The study was an analysis of reported heights and weights for parents of children participating in a mixed longitudinal study of children's growth. SETTING 20 study areas (16 in England and four in Scotland) were selected by st...
This work considers a tool for simulating single event transients produced by ground level radiation in VDSM ICs. Fault injection procedures and a fast fault simulation algorithm for transient faults were implemented around an event driven simulator. A statistical analysis was implemented to organize data sampled from simulations. The performance evaluation of the algorithm shows that for a lar...
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