The Influence of the Online Availability of USGS Topographic Maps on Weeding Decisions in Academic Libraries

This study looked at the degree to which the online availability of U.S. Geological Survey historical topographic maps affects academic libraries' decisions to withdraw the print versions of those maps. Other factors in making the decisions, such as usage, user preferences, support of academic programs, user discovery, shelving location, and printing options, were also investigated. Results show that while in 40% of the cases the online USGS historical topographic maps influenced the decision to weed, the need for space was the overwhelming driver of print USGS topographic map collection weeding within the past ten years.     

饮食干预运动性月经周期紊乱的研究进展

高强度的训练和日益紧张的竞技比赛易造成女运动员运动性月经周期紊乱（EAMD）。而运动性月经周期紊乱不仅与运动训练有关,更与女运动员的饮食摄入相关。能量摄入不足可直接影响女运动员的可利用能量,并损害生殖系统的功能。利用文献法就国内外学者采用饮食干预运动性月经周期紊乱的研究结果进行整合分析,得出饮食干预能增加女子运动员的可利用能量,并改善能量负平衡,其对运动性月经周期紊乱的防治具有一定的意义。     

Planning the Digital Public Library of America

By using barcodes to identify random lists of books, taking small monthly samples, and updating a simple control chart, the authors outline a simple, effective way (1) to chart the reasons why books aren't available; (2) to gauge if changes in procedures are needed; and (3) to determine if such changes are successful.     

新时期我国公共体育场馆的研究现状

对改革开放以来我国公共体育场馆的研究现状进行了分析,在此基础上,指出公共体育场馆研究中的薄弱环节,指明以后的研究重点和方向。     

Adolescent elite Kenyan runners are at risk for energy deficiency,menstrual dysfunction and disordered eating

Limited data are available on the female athlete triad (Triad) in athletes from minority groups. We explored subclinical and clinical Triad components amongst adolescent elite Kenyan athletes (n = 61) and non-athletes (n = 49). Participants completed demographic, health, sport and menstrual history questionnaires as well as a 5-day weighed dietary record and exercise log to calculate energy availability (EA). Ultrasound assessed calcaneus bone mineral density (BMD). Eating Disorder Inventory subscales and the Three-Factor Eating Questionnaire’s cognitive dietary restraint subscale measured disordered eating (DE). EA was lower in athletes than non-athletes (36.5 ± 4.5 vs. 39.5 ± 5.7 kcal ? kg FFM^?1 ? d^?1, P = 0.003). More athletes were identified with clinical low EA (17.9% vs. 2.2%, OR = 9.5, 95% CI 1.17–77, P = 0.021) and clinical menstrual dysfunction (32.7% vs. 18.3%, χ² = 7.1, P = 0.02). Subclinical (75.4% vs. 71.4%) and clinical DE (4.9% vs. 10.2%, P = 0.56) as well as BMD were similar between athletes and non-athletes. More athletes had two Triad components than non-athletes (8.9% vs. 0%, OR = 0.6, 95% CI 0.5–6.9, P = 0.05). Kenyan adolescent participants presented with one or more subclinical and/or clinical Triad component. It is essential that athletes and their entourage be educated on their energy needs including health and performance consequences of an energy deficiency.     

对高职教育人才培养模式的思考

在构建高等职业技术教育人才培养模式时，应以技术应用能力和职业素质培养为主线，并注意处理好基础理论与专业知识，理论课与实践课，传统内容与现代技术，学科课程和活动课程等关系。     

Microbial biomass in red soils and its significance in plant availability of nitrogen

A series of laboratory and pot experiments carried out to examine the role of soil microbial biomass in red soils' nitrogen availability and productivity showed that soil available N (NA), dry matter yield (DMY) of ryegrass, and plant uptake of nitrogen were each closely correlated with microbial biomass-C (Cmic) or -N (Nmic), suggesting that soil microbial biomass is a very important nitrogen pool available to plants in red soils. After correction for the substrate effect, the computed turnover of the Nmic in three tested soils ranged from 63 to 250 days. Soils with low Nmic or light texture generally had higher Nmic turnover rate than those with high Nmic or heavy texture. These results showed that soils with low Nmic, microbial biomass could also play an important role in the availability of nitrogen to plants due to these soils' high turnover rate.     

阅读教学的主体间性论

阅读教学是一种带有文学解释性质的主体间性对话。从阅读教学的运行机制和内在规律来看，作为阅读教学的主体间性对话显现为文本改写的过程：学生不断地在教师引导下优化自己的解释文本，并借此最终达成知、情、意、言全方位的教育生成。这样的文本改写应遵循三个基本原则：教育性原则、文本解释的有效性原则和语言学习效能原则。     

谓词数据流图的功能性语义

SOZL (structured methodology object-oriented methodology Z language) is a language that attempts to integrate structured method, object-oriented method and formal method. The core of this language is predicate data flow diagram (PDFD). In order to eliminate the ambiguity of predicate data flow diagrams and their associated textual specifications, a formalization of the syntax and semantics of predicate data flow diagrams is necessary. In this paper we use Z notation to define an abstract syntax and the related structural constraints for the PDFD notation, and provide it with an axiomatic semantics based on the concept of data availability and functionality of predicate operation. Finally, an example is given to establish functionality consistent decomposition on hierarchical PDFD (HPDFD).     

基于嵌入式移动数据库环境面向客户复制技术的设计与实现

在嵌入式移动环境中,数据库系统需要拥有一种机制来保证在非连接状态下客户数据的有效性。我们给出了一种新的面向客户端的数据复制技术来完成数据一致性的保障,使用这种技术,移动系统可以根据需要来定义或重定义复制数据或复制功能。