诞生生命的残骸

银河系中的一颗超新星为我们提供了行星和人类起源的线索。[编者按]     

网络信息资源组织模式研究

考察和分析了目前网络信息资源组织的模式,并将其按一次、二次、三次网络信息资源组织模式进行了组织与更新,分析了一次、二次网络信息资源的各类组织模式的特点,针对于目前还没有系统研究成果的三次网络信息资源组织模式,提出了网络数字图书馆、网络信息资源评价网站以及元搜索引擎目录三种新模式。     

79 new cyclopeptides discovered from 28 plants

A key innovative research result has been achieved in systematic chemistry of plant cyclopeptides (PCPs), a group of important plant metabolites, by a research team with the CAS Kunming Institute of Botany (KIB)in the capital of southwest China's Yunnan Province. According to a recent announcement released by the Institute, its chemists have brought to light 79 new PCPs.     

Making a difference? Measuring the impact of an information literacy programme for pre-registration nursing students in the UK

OBJECTIVES: To investigate whether an information literacy programme for pre-registration nursing students at a UK higher education institution is effective in developing their skills and confidence: examines students' skill levels, factors affecting their confidence, and relationships between skills, confidence and demographic characteristics. METHODS: Quantitative and qualitative techniques were used: pre- and post-tests to measure changes in students' skills and self-assessed confidence levels after two key sessions in their first semester (n = 29); semi-structured interviews to explore factors affecting confidence (n = 5). RESULTS: Findings demonstrated positive impacts on skills and confidence. Key areas of skill development included: identifying journal articles, selecting search terms and evaluating website quality. Factors affecting confidence included: successful 'mastery' experiences in searching for information and the programme itself, especially small-group sessions, handouts and staff support. Evidence on links between skills, confidence and demographic factors was inconclusive. CONCLUSIONS: The study demonstrated the programme's effectiveness and identified areas for development, including the need to help students understand the relative merits of search engines and other sources. Evidence has contributed to a change in departmental policy, making attendance at sessions mandatory. Further studies have been recommended.     

细节的伤害

一位开出租车的朋友,将遗失在车上的钱包还给了失主。钱有两万多元!许多人认为他傻。耽搁了几天的出车时间,去报社,请电视台,出招领。钱包递到失主手里,心,这时却真的凉了。     

How I teach evidence-based epidural information in a hospital and keep my job

A childbirth educator reveals her dilemma in teaching evidence-based practice in today's high-tech birth climate. She focuses on strategies to use when sharing epidural information with expectant parents.     

Commentary: the coalition for improving maternity services:

A consumer advocate, two childbirth educators, and a certified nurse-midwife each provide commentary on the effectiveness of and potential uses for the Evidence Basis for the Ten Steps of Mother-Friendly Care.     

Flavor-evaluative conditioning is unaffected by contingency knowledge during training with color-flavor compounds

In two experiments, participants inspected and drank a series of drinks, half of which contained sugar and half unpalatable Tween20 (tween). Each sugar and tween drink had a particular flavor and color. Following this training, the flavors of the sugar drinks were assigned higher hedonic evaluations than were those of the tween drinks, even though the participants did not reliably report which flavors had been present in the sugar and tween drinks during training. Moreover, the evaluative conditioning of the flavors was unaffected by whether or not the colors alone had been pretrained to predict the presence of sugar or tween in the drinks. In accord with Baeyens, Eelen, van den Bergh, and Crombez (1990), we conclude that flavor-evaluative conditioning is not mediated by contingency learning.