Genomic diversity and post-admixture adaptation in the Uyghurs

Population admixture results in genome-wide combinations of genetic variants derived from different ancestral populations of distinct ancestry, thus providing a unique opportunity for understanding the genetic determinants of phenotypic variation in humans. Here, we used whole-genome sequencing of 92 individuals with high coverage (30–60×) to systematically investigate genomic diversity in the Uyghurs living in Xinjiang, China (XJU), an admixed population of both European-like and East-Asian-like ancestry. The XJU population shows greater genetic diversity, especially a higher proportion of rare variants, compared with their ancestral source populations, corresponding to greater phenotypic diversity of XJU. Admixture-induced functional variants in EDAR were associated with the diversity of facial morphology in XJU. Interestingly, the interaction of functional variants between SLC24A5 and OCA2 likely influences the diversity of skin pigmentation. Notably, selection has seemingly been relaxed or canceled in several genes with significantly biased ancestry, such as HERC2–OCA2. Moreover, signatures of post-admixture adaptation in XJU were identified, including genes related to metabolism (e.g. CYP2D6), digestion (e.g. COL11A1), olfactory perception (e.g. ANO2) and immunity (e.g. HLA). Our results demonstrated population admixture as a driving force, locally or globally, in shaping human genetic and phenotypic diversity as well as in adaptive evolution.     

多样性与未来文化的可持续发展

当文化的同一性减少我们的快乐和我们智力的、情感的、物质的财富时,多样性是有益的。文化多样性可以为所有人提供扩大文化选择权的机会。如果文化的多样性及其自由能够得到保证,那么文化也就获得了可持续发展的前提、动力和资源。     

Examining the Relationships Among Coaching Staff Diversity,Perceptions of Diversity,Value Congruence,and Life Satisfaction

The purpose of this study was to examine relationships among coaching staff diversity, perceptions of diversity, value congruence, and life satisfaction. Data were collected from 71 coaching staffs (N = 196 coaches). Observed path analysis was used to examine the study predictions. Results indicate that actual staff diversity was positively related to perceptions of such heterogeneity, which were negatively related to value congruence among the coaches. Finally, value congruence was positively associated with life satisfaction of members of the coaching staff. Results are discussed in terms of research and practical implications.     

浅析胡锦涛同志“同心”思想提出的理论依据

2011年1月30日下午,在中南海中共中央召开的党外人士迎春座谈会上,胡锦涛同志就中国共产党与中国民主党派、工商联、无党派人士风雨同舟的历史经验进行了概括和总结,首次提出了中国统一战线和多党合作理论的＂同心＂思想。这一思想为搞好新时期的统战工作指明了重要方向。本文拟就该思想提出的理论依据试作粗浅分析,以进一步加深人们对＂同心＂思想的认识与理解,充分发挥＂同心＂思想在社会主义现代化建设中的重大作用。     

赣南师范学院(黄金校区)访花昆虫物种多样性研究

为了解赣南师范学院黄金校区访花昆虫种类,笔者于2010年10月-2011年10月开花期间在校园内采用随机取样和系统取样法,以网捕和手捕方式采集访花昆虫并进行鉴定.结果表明:师院校园共有访花昆虫135种,分属于7目,39科.从目级分类阶元物种数量水平上分析,鳞翅目>膜翅目>鞘翅目>双翅目>半翅目>蜻蜓目>同翅目,其中优势访花昆虫种类为意大利蜜蜂(Apis mellifera)、黑带食蚜蝇(Episyrphus balteatus)和异色瓢虫(Harmonia axyidis).     

SCUBA Diving: Motivating and Mentoring Culturally and Cognitively Diverse Adolescent Girls to Engage in Place-Based Science Enrichment

Abstract

Many bright, talented girls from populations traditionally underrepresented in Science, Technology, Engineering, and Mathematics (STEM) are underachieving or disengaged in school, despite having an interest in STEM. Qualitative research was conducted with teenaged girls from culturally and academically diverse backgrounds participating in an extracurricular scientific diving SCUBA program. The program provided opportunities for these girls to learn and apply STEM knowledge and SCUBA diving skills during research, service learning and place-based, hands-on projects. Findings suggest that motivation for STEM in teenaged girls increases when they are able to participate in real-life, place-based activities they find personally meaningful with other interest-based peers and mentors.     

保康野生蜡梅群落及其遗传多样性研究进展

对蜡梅种质资源和植物遗传多样性等方面的研究进展进行了系统的概括和总结,并提出了保康野生蜡梅群落及其遗传多样性研究的意义及技术路线。     

比较英语和汉语中的委婉语

委婉语是汉、英语言中共有的现象,它不仅是一种社会语言现象,也是一种文化现象。在很多领域,人们广泛地使用着委婉语,它在交际中起着很重要的作用。     

基于矩阵扩展方法的多速率线性离散码设计

在采用空时码的无线通信系统中,收发2端较差的路径会降低系统的性能.提出了多速率线性离散码(LDC),并对其进行了分析,给出了一种基于矩阵扩展方法的设计算法.多速率LDC是传统LDC和LDC-TAS的BER性能的折中.进而提出了一种性能优于传统LDC-A-TAS算法的多速率LDC自适应发送天线选择(A-TAS)算法.     

抓住机遇推进高黎贡山国家生物多样性保护基地建设

生物多样性不仅是云南的优势,也是最有潜力的新经济增长点。作为滇西北生物多样性的重要组成部分,高黎贡山在我国乃至国际地理学与生物多样性保护中,占有极其重要的地位。积极推进生物多样性保护基地建设对于云南省生物资源、旅游资源开发利用,实施可持续发展战略,推进我国乃至世界生物多样性的保护,具有重要意义。