نتایج جستجو برای: glmm
تعداد نتایج: 393 فیلتر نتایج به سال:
در این مطالعه تغییرات بانک بذر خاک در دو پوشش گندمی و درختچهای آتشسوزی شده که بیانگر شدتهای مختلف آتش (کموزیاد) بود، بررسی شد. نمونهبرداری خاک از سایت شارلق واقع در پارک ملی گلستان انجام شد؛ بنابراین تعداد 10 نمونه خاک شامل 5 درختچه و نیز 5 قطعه پوشش گندمی در سایت کنترل و نیز تعداد 5 درختچه و 5 قطعه پوشش گندمی سوخته بهعنوان شدت کموزیاد در سایت آتشسوزی انتخاب شد. جوانهزنی بذور به روش ...
زمینه و اهداف: عفونت هلیکوباکتر پیلوری در حال حاضر بهصورت یک مسئله بهداشتی جهانگستر تبدیلشده است. این عفونت میتواند باعث بیماریهای مختلف گوارشی شود. نقش گروههای خونی در نحوه پاسخگویی بدن به میکروارگانیسمها و گسترش اختلالات دستگاه گوارش تثبیتشده است. هدف از این مطالعه بررسی ارتباط بین گروههای خونی و سن و جنس در جمعیت ایرانی با شدت آلودگی به این باکتری است. مواد و روش کار: در این مطالعه ...
This study took place in a vegetation mosaic of the Llobregat delta (near Barcelona, Spain), which includes both natural and spontaneously restored coastal marshes. We used a dataset comprising vegetation relevés, soil parameters and water table conditions, and explored their correlation. More precisely, we classifi ed the relevés into three phytosociological alliances (namely Phragmition commu...
Insights into bacterium-host interactions and genome evolution can emerge from comparisons among related species. Here we studied Helicobacter acinonychis (formerly H. acinonyx), a species closely related to the human gastric pathogen Helicobacter pylori. Two groups of strains were identified by randomly amplified polymorphic DNA fingerprinting and gene sequencing: one group from six cheetahs i...
BACKGROUND Endotracheal intubation is not always an option for unconscious trauma patients. Prehospital personnel are then faced with the dilemma of maintaining an adequate airway without risking deleterious movement of a potentially unstable cervical spine. To address these two concerns various alternatives to the classical recovery position have been developed. This study aims to determine th...
A study was designed to investigate management factors that might influence the shedding of verocytotoxin-producing Escherichia coli (VTEC) O157 by beef cows in Scotland, where there is a particularly high rate of human infection. Thirty-two herds were visited at least monthly over approximately 1 year for collection of fresh faecal pat samples and information on management factors. The faecal ...
Abstract Background Meta-analysis is a statistical method to synthesize evidence from number of independent studies, including those clinical studies with binary outcomes. In practice, when there are zero events in one or both groups, it may cause problems the subsequent analysis. Methods this paper, by considering relative risk as effect size, we conduct comparative study that consists four co...
The use of functional near-infrared spectroscopy (fNIRS) hyperscanning during naturalistic interactions in parent–child dyads has substantially advanced our understanding the neurobiological underpinnings human social interaction. However, despite rise developmental studies over last years, analysis procedures have not yet been standardized and are often individually developed by each research ...
• Digital Elevation Models (DEMs) are often used in landscape ecology to retrieve elevation or first derivative terrain attributes such as slope or aspect in the context of species distribution modelling. However, DEMderived variables are scale-dependent and, given the increasing availability of very high resolution (VHR) DEMs, their ecological relevance must be assessed for different spatial r...
The generalized linear mixed model (GLMM), which extends the generalized linear model (GLM) to incorporate random effects characterizing heterogeneity among subjects, is widely used in analyzing correlated and longitudinal data. Although there is often interest in identifying the subset of predictors that have random effects, random effects selection can be challenging, particularly when outcom...
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