نتایج جستجو برای: conversion

تعداد نتایج: 113069  

2008
Enrico Moretti

We survey the evidence on whether racial attitudes negatively affected Barack Obama’s vote share in the 2008 presidential election. There is some evidence pointing toward this possibility. First, the increase in the Democratic vote share in the presidential election between 2004 and 2008 was relatively smaller in Appalachia and some Southern states. Second, there was a significantly smaller 200...

Journal: :Genetics 2010
Sayaka P Mansai Hideki Innan

Interlocus gene conversion can homogenize DNA sequences of duplicated regions with high homology. Such nonvertical events sometimes cause a misleading evolutionary interpretation of data when the effect of gene conversion is ignored. To avoid this problem, it is crucial to test the data for the presence of gene conversion. Here, we performed extensive simulations to compare four major methods t...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 1985
T Ohta

By using a model of gene conversion for treating concerted evolution of multigene families, a theory for calculating the variances and covariances of identity coefficients has been developed. Six coefficients on triple identity and 15 coefficients on quadruple identity are needed. The variances and covariances are obtained from the quadruple identity coefficients and divided into within-populat...

2006
Stephen Herron

Halftones, or periodic cluster dithers, are point-to-point, contone pixel to halftone dot, conversion processes. This paper describes an approach to achieving accurate halftone reproduction by using the errors caused during the scan conversion process without comparison to the source pixels and maintaining the point-to-point scan conversion paradigm. Two types of density errors encounter in the...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه کاشان - پژوهشکده علوم نانو 1393

در این پژوهش تأثیر ضخامت فیلم tio2 فوتوالکترود سلول خورشیدی رنگدانه ای و فیلم لومینسنت cevo4:dy3+ بر روی کارایی فوتوولتائیک سلول خورشیدی رنگدانه ای (dssc) مورد بررسی قرارگرفته است. بدین منظور نانوبلورهای cevo4 با ناخالصی های مختلف از عناصر لانتانیدها با روش هیدروترمال ساخته شدند. با استفاده از نتایج بررسی های طیف سنجی uv-vis و pl مشخص شد که این نانوبلـورها مـی توانند به عنوان یک ماده ی لومینسنت...

2016
Hongfei Zheng Xu Yu Yuehong Su Saffa Riffat Jianyin Xiong

In the real solar tower thermal power system, it is widely acknowledged that the thermodynamic irreversibility, such as convective and radiative loss on tower receiver, and thermal resistance in heat exchangers, is unavoidable. With above factors in mind, this paper presents an ideal model of the solar tower thermal power system to analyze the influence of various parameters on thermal and exer...

2015
K. Niki Kunene

The use and ready availability of electronic health records is broadly purported to have the potential to improve health outcomes for individual healthcare consumers, providers and the healthcare system as a whole. Unlike electronic health records that are created and managed by providers, personal health records (PHR) are controlled by the individual consumer and the persons/entities to which ...

2001
Robin R. Murphy Jenn Casper Mark Micire

Previous workk5] has summarized our experiences working with the Hillsborough Fire Rescue Department and FEMA documents pertaining to Urban Search and Rescue. This paper discusses the lessons learned and casts them into four main categories of tasks for the physical agent portion of RoboCup-Rescue: 1) reconnaissance and site assessment, 2) rescuer safety, 3) victim detection, and 4) mapping and...

2009
Prabirjit Sarkar Ajit Singh

This paper analyses a longitudinal dataset on legal protection of shareholders over a 36 year period, 1970-2005 for four advanced countries, UK, France, Germany and the US. It examines two aspects of the legal origin hypothesis whether shareholder protection is higher in the common law countries (UK and USA) than in the civil law countries (France and Germany) and whether shareholder protection...

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