Kicking modality during erratic-dynamic and static condition effects the muscular co-activation of attacker

The purpose of the study was to investigate the effect of different kicking modality, i.e., erratic-dynamic target (EDT) versus static target (ST) on the performance of the roundhouse kick in two groups of taekwondo athletes of different skill level. Three-dimensional analysis and surface electromyography (SEMG) analysis were performed on 12 (Group A: six sub-elite, Group B: six elite) athletes to investigate muscle co-activation pattern under two conditions, i.e., EDT versus ST. In the results, the muscle recruitment ratio of the agonistic muscles was higher for Group A, whereas Group B had higher recruitment ratio for antagonist muscles. Overall, the co-activation index (CI) of hip joints appeared higher in the extensors for Group A, whereas higher CI was observed in flexor muscles for Group B with comparatively higher CI during EDT condition than ST condition. Higher value of CI was observed in flexor muscles of the knee joints among Group A during EDT conditions, in contrast, higher CI in the extensor muscles was observed among Group B during ST conditions. In conclusion, the study confirmed that erratic-dynamic movements of target could change the movement coordination pattern to maintain the joint stability of participants.     

采煤塌陷对中国西部风沙区土壤质量的影响机制及修复措施

中国西部风沙区生态环境脆弱,煤炭井工开采造成土体坍塌,产生地表裂缝,导致地下水位下降、土壤含水量减少、土壤养分流失、土壤酶活性降低、微生物数量和群落结构发生变化、土壤沙化、植被死亡以及生物多样性破坏等生态环境问题。主要剖析近年来煤炭地下开采对西部风沙区土壤理化性质、土壤酶活性、土壤微生物和植被生长等方面的影响机制,提出塌陷区土壤环境破坏的修复措施。指出今后的研究应集中于采煤塌陷区土壤质量的恢复和土壤微生物多样性的演替规律方面,为中国西部风沙区采煤塌陷地的生态修复提供理论基础和技术支持。     

沈家本的刑事审判法思想初探

作为清末法学大家,沈家本有着较为丰富的刑事审判法思想。他主张仿效西方,在我国构建专门的审判机关体系,设立陪审制度,废除法堂刑讯,并呼吁对审判官进行职业教育和严格选拔。沈家本的学术思想和修律实践有力地推动了中国刑事审判的近代化进程。     

电子期刊与纸质期刊对比分析研究

电子期刊是高校图书馆的新型信息资源,在教学科研工作中起着越来越大的作用.但目前各图书馆都存在电子期刊与纸质期刊重复收藏现象.如何正确处理好二者的相互关系.使有限的经费发挥出最大的效能,是一个值得深入研究的问题.以华北电力大学图书馆外文纸质期刊与电子期刊的收藏情况为样本,逐一进行了对比分析,进而提出了几点协调两者关系的设想.     

A Volatile Public: The 2009 Whole Foods Boycott on Facebook

The 2009 “Boycott Whole Foods” campaign was born on Facebook in response to criticism by Whole Foods CEO John Mackey of the Obama administration's proposed health-care reforms. The boycott demonstrates volatile collective action through heterogeneous and heterarchic encounters, characterized by the formation of a collective across geographical distance, vibrant interaction across political distance, and temporary presence. These features suggest the possibility of further activism by the middle class on shared ethical issues, and of unintended yet forceful consequences of activism on social media. Despite widespread concern about group polarization in cyberspace, social media also offer a space in which enclaves encounter opponents and subject their ideas to scrutiny.     

论图书馆保护非物质文化遗产的职能

图书馆应确立保护非物质文化遗产的职能,并通过多种措施来参与这种文化遗产的保护工作,如宣传、发展文献保存与服务体系,提供活动场所与组织服务,参与研究与调查工作,等等。     

谈石刻文献整理

石刻文献整理中的题名确定、文字辨识、刻立年代考订、拓本考证等工作,均非常重要。完成这些工作,除要有一定的学识和经验外,还要借助相关的工具书去解决问题。     

人性化的数字图书馆网站设计

本文阐述了“人性化”的数字图书馆网站应遵循的设计原则,并对网站的风格特征、版面布局、功能模块设计提出了自己的参考性建议。