نتایج جستجو برای: two tailed t

تعداد نتایج: 2993636  

Journal: :journal of medical signals and sensors 0

electro encephalography is one of the reliable sources to detect sleep onset while driving. in this study we have tried to demonstrate that sleepiness and alertness signals are separable with an appropriate margin by extracting suitable features. so first of all we have recorded eeg signals from 10 volunteers. they were obliged to be sleep deprived about 20 hours before the test. we recorded th...

2017
Joshua Rozell

109 retrieved after testing and subjected to threepoint bending (Figure 1B) and pull-out tests (Figure 1C) to elucidate differences in relevant performance characteristics. One-tailed paired student’s t-tests were used to evaluate the injuries applied to the specimens. For all other tests in this study, two-tailed, two-sample, equal variance t-tests were used with significance levels set at p=0...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه اراک - دانشکده ادبیات و علوم انسانی 1391

این مطالعه به بررسی رابطه میان دریافت شنیداری و میزان تحمل ابهام و سطوح بالا، متوسط و پایین آن در زبان آموزان ایرانی در اصفهان می پردازد.علاوه بر این، تاثیر تدریس ضمنی صورت های خفیف و اتصال گفتاری در تلفظ، بر دریافت شنیداری و تاثیر این آموزش ها و گذر زمان در تغییر سطح تحمل ابهام بررسی شده است. پس از همگون سازی شرکت کنندگان به وسیله آزمون تعیین سطح آکسفورد، 82 شرکت کننده به 4 زیرگروه کنترل و آزم...

2009
Zhirong Yang Irwin King Zenglin Xu Erkki Oja

Stochastic Neighbor Embedding (SNE) has shown to be quite promising for data visualization. Currently, the most popular implementation, t-SNE, is restricted to a particular Student t-distribution as its embedding distribution. Moreover, it uses a gradient descent algorithm that may require users to tune parameters such as the learning step size, momentum, etc., in finding its optimum. In this p...

2005
Cam-Loi Huynh

By imposing directional decisions on traditional two-tailed tests, you will overestimate power, underestimate sample size, and ignore the risk of Type III error. You can avoid these problems by using the directional two-tailed test. This paper demonstrates how to use PROC POWER to estimate the prospective power and Type III error for one-sample, two-sample and paired t tests for means, and bino...

Journal: :The Journal of heredity 2009
Marjo K Hytönen Anaïs Grall Benoît Hédan Stéphane Dréano Samuel J Seguin Delphine Delattre Anne Thomas Francis Galibert Lars Paulin Hannes Lohi Kirsi Sainio Catherine André

Dogs differ greatly in their morphological characteristics including various tail phenotypes. Congenitally short-tailed dogs are present in many breeds; however, the causative mutation located in the T-box transcription factor T gene (C189G) had only been described in the bobtailed Pembroke Welsh Corgis. We investigated here the presence of the T gene mutation in 23 other breeds (360 dogs, incl...

Journal: :The British journal of ophthalmology 2003
A K H Kwok T Y Y Lai

AIMS To determine the surgical outcome of indocyanine green (ICG) assisted retinal internal limiting membrane (ILM) peeling in macular hole surgery for severely myopic eyes and compare the visual and anatomical outcomes with an emmetropic control group. METHODS 10 severely myopic eyes (-6.0 D or greater) of 10 patients with macular holes without retinal detachment were recruited prospectively...

2013
G. Matthew Fricke François Asperti-Boursin Joshua P. Hecker Judy L. Cannon Melanie E. Moses

In order to trigger an adaptive immune response, T cells move through lymph nodes searching for dendritic cells that carry antigens indicative of infection. We observe T cell movement in lymph nodes and implement those movement patterns as a search strategy in a team of simulated robots. We find that the distribution of step-sizes taken by T cells are best described by heavy-tailed (Lévy-like) ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان تهران - دانشکده علوم پایه 1391

نیروگاه حرارتی شازند واقع در شمال شرقی شازند در استان مرکزی از سال 1379 شروع به کار کرد. سوخت مورد نیاز این نیروگاه، گاز طبیعی و اغلب مازوت است. بنابراین آلاینده های منتشره از این نیروگاه، آلاینده های گوگردی، نیتروژن دار و مونوکسیدکربن هستند. بیشترین آلاینده در زمان استفاده از مازوت، ترکیبات گوگردی می باشد. به دلیل اهمیت گیاهان خانواده ی لگومینوزه از نظر اکولوژیکی، مرتعی، دارویی و خوراکی این مط...

2016
Jun Yan Bai Xu Wang You Bing Yang Xiao Hui Zhang You Zhi Pang Hong Wei Li

In this study, POU1F1 gene polymorphism was detected in five sheep populations (large-tailed Han, small-tailed Han, Yuxi fat-tailed, Lanzhou large-tailed, and Mongolian sheep), using DNA pooling and sequencing, to provide theoretical basis for the breeding of excellent sheep varieties. Three single-nucleotide polymorphism (SNP) loci of POU1F1 gene were detected in five sheep populations, namely...

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