نتایج جستجو برای: variable study
تعداد نتایج: 4140053 فیلتر نتایج به سال:
1. Motivation and objectives In many industrial devices such as heat exchangers, piston engines, or propulsion systems strong temperature gradients arise in the near wall region even if the characteristic Mach number is close to zero. A strong coupling exists between momentum and energy equations caused by variations in the fluid properties, and the classical wall models for incompressible flow...
The purpose of this lab was to test Faraday’s Law using a Linear Variable Differential Transformer (LVDT). Basically, an LVDT consists of three coils (of 100 windings each) spaced evenly along an insulating rod. A voltage of around 6 V was applied across the inner coil, and a ferromagnetic rod was inserted into the solenoids. According to Faraday’s Law, a changing magnetic flux within the ferro...
Recent work on Internet measurement and topology characterization has revealed a feature sharply distinct from the early Erdős-Rényi random graph model: highly variable degree distributions which arguably follow power-laws. Such properties may significantly affect various network algorithms and protocols. This paper explores whether and how degree variability causes routing bias, a phenomenon t...
The incidence of type 1 diabetes (T1D) has substantially increased over the past decade, suggesting a role for non-genetic factors such as epigenetic mechanisms in disease development. Here we present an epigenome-wide association study across 406,365 CpGs in 52 monozygotic twin pairs discordant for T1D in three immune effector cell types. We observe a substantial enrichment of differentially v...
the purpose of the research is to examine if integrating cooperative learning into vocabulary learning helps to increase word recognition of students in an elementary school in iran. it tries to investigate whether cooperative learning approach enables students to improve their language learning. this research used stad (students team achievement division) as a cooperative model in this study. ...
this study examined the effects of collaborative strategic reading and direct instruction in persuasion on iranian high school students persuasive writing and attitudes. students in three intact classes were assigned to one of three treatment conditions: collaborative strategic reading and direct instruction in persuasion or direct instruction in persuasion or a control group. treatment effects...
The retina is a complex nervous system which encodes visual stimuli before higher order processing occurs in the visual cortex. In this study we evaluated whether information about the stimuli received by the retina can be retrieved from the firing rate distribution of Retinal Ganglion Cells (RGCs), exploiting High-Density 64x64 MEA technology. To this end, we modeled the RGC population activit...
In this paper, we propose more flexible applicability conditions for the folding rule that increase the power of existing unfold/fold systems for normal logic programs. Our generalized folding rule enables new transformation sequences that, in particular, are suitable for recursion introduction and local variable elimination. We provide some illustrative examples and give a detailed proof of co...
Interesting equalities have recently been discovered about latent tree models. They relate distributions of two or three observed variables with joint distributions of four or more observed variables, and with model parameters that depend on latent variables. The equations are derived by using matrix and tensor decompositions. This paper sheds new light on the equalities by offering an alternat...
INTRODUCTION Instrumental variable (IV) methods have been used in econometrics for several decades now, but have only recently been introduced into the epidemiologic research frameworks. Similarly, Mendelian randomization studies, which use the IV methodology for analysis and inference in epidemiology, were introduced into the epidemiologist's toolbox only in the last decade. ANALYSIS Mendeli...
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