Results 61 to 70 of about 3,152,770 (169)

Common variable immune deficiency: case studies [PDF]

Hematology, 2019
Abstract Common variable immune deficiency (CVID) is one of the most common congenital immune defects encountered in clinical practice. The condition occurs equally in males and females, and most commonly in the 20- to 40-year-old age group. The diagnosis is made by documenting reduced serum concentrations of immunoglobulin G (IgG), IgA,
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Sources of variability in rodent carcinogenicity studies

Fundamental and Applied Toxicology, 1989
A number of factors may influence tumor rates in rodent carcinogenicity studies, including the animal room environment, genetic differences, food consumption/weight gain, survival/age of the animals, identification of gross lesions, pathology sampling procedures and preparation of the histology slides, and histopathologic diagnosis.
J K, Haseman, J E, Huff, G N, Rao, S L, Eustis   +3 more
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Modified correlated measurement errors model for estimation of population mean utilizing auxiliary information

Scientific Reports
The existence of measurement errors cannot be avoided in practice. It is a prominent fact that the existence of measurement errors diminishes conventional properties of the estimators.
Housila P. Singh, Neha Garg
doaj   +1 more source

Exploring the dependability of Combined Ratio Estimators in Stratified Ranked Set Sampling: Insights from COVID-19 data

Alexandria Engineering Journal
In this study, we introduce a novel combined ratio type estimator within the framework of Stratified Ranked Set Sampling to estimate the population mean of the study variable by incorporating bivariate auxiliary information.
G.R.V. Triveni, Faizan Danish
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Variable Temperature ⁵⁷Fe-Mössbauer Spectroscopy Study of Nanoparticle Iron Carbides

Croatica Chemica Acta, 2015
Near-phase-pure nanoparticle iron carbides (Fe3C and Fe5C2) were synthesised. Debye model calculations were used with hyperfine parameters gathered by 57Fe Mössbauer spectroscopy within a temperature range of 10 K to 293 K, with analysis providing Debye ...
Alex Scrimshire, Alex L. Lobera, Roman Kultyshev, Peter Ellis, Susan D. Forder, Paul A. Bingham   +5 more
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Phenome-wide causal associations between osteoarthritis and other complex traits through the latent causal variable analysis

BMC Musculoskeletal Disorders
Background Individuals with osteoarthritis present with comorbidities, and the potential causal associations remain incompletely elucidated. The present study undertook a large-scale investigation about the causality between osteoarthritis and variable ...
Lin Mei, Zhiming Zhang, Ruiqi Chen, Zhihong Li   +3 more
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Is being overweight a causal factor in better survival among the oldest old? a Mendelian randomization study

Frontiers in Aging
Overweight, defined by a body mass index (BMI) between 25 and 30, has been associated with enhanced survival among older adults in some studies. However, whether being overweight is causally linked to longevity remains unclear.
Hongzhe Duan, Konstantin Arbeev, Rachel Holmes, Olivia Bagley, Deqing Wu, Igor Akushevich, Nicole Schupf, Anatoliy Yashin, Svetlana Ukraintseva   +8 more
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Study on Multiaxial Fatigue Damage Behavior of HRB335 Under Variable-Amplitude and Variable-Path Loading

Buildings
Fatigue failure is a prevalent concern within structural engineering, often resulting in critical safety risks. The inherent complexity of construction projects leads to structural components experiencing loads of varying amplitudes and diverse load ...
Shihong Huang, Shenghuan Qin, Chengye Liang   +2 more
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Study on Failure Boundary of Thermal-scuffing for Heavy Duty Gear Transmission with Variable Speed and Variable Torsion

Jixie chuandong, 2021
In view of the service characteristics of driving devices such as construction machinery， aerospace， rail transit and electric vehicle in the variable speed and variable torsion， the damage mechanism of thermal-scuffing failure for gear transmission is ...
Jiqiang Li, Yanxin Li, Chao Chen, Liang Chen, Shidang Yan, Wei Ding   +5 more
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Experimental Study on Variable-frequency Screw Compressor with Economizer under Variable Working Conditions

Zhileng xuebao, 2018
To improve the efficiency of a variable-frequency screw compressor with an economizer, the effect of parameters such as the discharge pressure of the compressor, motor frequency, injection pressure of the economizer, and volumetric efficiency on the ...
Qin Huanghui
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