Peoples of Melanesia     

《Cataloging & classification quarterly》2013,51(4):47-51

The mnemonic principles of the Dewey Decimal Classification were violated when Table 5 (Racial, Ethnic and National Groups) was introduced. Suggestions are presented to restore such principles to a large area of the South Pacific with particular reference to Melanesia.  相似文献   

PCC Practice for Assigning Uniform Titles for Television Programs: Principle versus Practice     

Peter H. Lisius 《Cataloging & classification quarterly》2013,51(5):550-579

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构建以自助服务为导向的现代图书馆     

陈武  姜爱蓉 《大学图书馆学报》2013,(3):93-96

自助服务已经成为图书馆服务的一种重要形式.清华大学人文社科图书馆在建设之初就充分考虑了自助服务的需求,根据读者需求和自身特点,在实施了统一用户认证信息库、公告发布系统和电话咨询系统的基础上,提供了自助借还书、24小时自助还书窗口、自助缴纳超期罚款、自助文印服务、自助机位管理系统、自助研读间预订、自助阅览座位管理和开放密集架书库等服务,尝试构建一个以自助服务为导向的现代图书馆.  相似文献   

A Vocabulary Learning Tool for L2 Undergraduates Reading Science and Technology Textbooks     

Chihcheng Hsu  Fang-Chuan Ou Yang 《International Journal of Science Education》2013,35(7):1110-1138

Students of English as a second language who major in science and technology use English-language textbooks to ensure that they can read English materials upon graduation. Research indicates that teachers spend little time helping these students on the linguistic complexity of such textbooks. Vocabulary, grammar, and article structure are elements of this complexity, but to many students, these elements can be akin to locked doors. This study presents MyVLS-Reader, which focuses on unlocking the first of these doors—vocabulary—while assisting in reading. With explicit vocabulary learning, students learn and memorize individual vocabulary, but the context is lost if the depth of learning discards context. In implicit vocabulary learning, students acquire vocabulary through repeated exposure to contexts, but repeated encounters with new words are required. Few e-learning systems combine both vocabulary-learning approaches. MyVLS-Reader achieves such synergy by (1) using a keyword setting to provide context-matched vocabulary explanation while reading and (2) embedding multiple learning choices, such as keyword setting, the review and memorization of explicit vocabulary, and the option to ask instructors. This study includes two rounds of evaluations: (1) an evaluation of the learning achievements of control and treatment groups and (2) a quantitative and qualitative investigation of perceptions regarding the use of MyVLS-Reader. The evaluation results indicate that the treatment group developed a better vocabulary than the control group in significantly less time. The use of MyVLS-Reader also slightly improved higher-order thinking skills. This result suggests that MyVLS-Reader can effective assist students in building their vocabulary while reading.  相似文献   

The educational expectations of Italian children: the role of social interactions with the children of immigrants     

Alessandra Minello 《International Studies in Sociology of Education》2013,23(2):127-147

This paper aims to investigate to what extent the growing presence of children with immigrant background in the Italian school system has an impact on the educational expectations of Italian students in eighth grade. Educational expectations are individuals’ plans for their future educational career, adjusted to the subjectively estimated probabilities of achieving a given outcome. Multilevel analyses are performed using data from ITAGEN2 (Italian Second Generation) survey, the first nationwide survey on natives, first- and second-generation immigrants. Results demonstrate that attending a school with a high proportion of children of immigrants has no impact on realistic expectations about secondary education. In addition, students attending schools with high level of interethnic integration are more prone to having high educational expectations.  相似文献   

一种蜂窝网络中支持D2D通信的资源分配方法     

张源  武文斌  李昕 《东南大学学报》2013,(4):361-365

基于冲突图模型形成的二进制整数规划,提出了一种蜂窝网络中支持D2D通信的无线资源分配方法．首先,提出一种频率资源分配算法,即为每个D2D链路都分配一个频率资源块．分配频率资源时将尽可能地利用蜂窝网络中的无线频率资源空间重用机会．然后,提出一种时隙调度算法,即为所有分配同一频率资源块的D2D链路进行时隙资源调度．调度时隙资源时将保证使用同一频率资源块的D2D链路之间达到长期平均吞吐率的比例公平．通过计算机仿真对所提出方法的性能进行了验证,结果表明该方法能够在蜂窝网络中实现D2D通信功能．  相似文献   

Identification of the activity source of CO2 electroreduction by strategic catalytic site distribution in stable supramolecular structure system     

Sheng-Nan Sun  Ning Li  Jiang Liu  Wen-Xin Ji  Long-Zhang Dong  Yi-Rong Wang  Ya-Qian Lan 《国家科学评论(英文版)》2021,8(3)

Identification of the real catalytic site in CO₂ reduction reaction (CO₂RR) is critical for the rational design of catalysts and the understanding of reactive mechanisms. In this study, the catalytic activity of pyridine-containing materials was for the first time structurally demonstrated in CO₂RR by crystalline supramolecular coordination compounds model system. The system consists of three stable supramolecular coordination compounds (Ni-TPYP, Ni-TPYP-1 and Ni-TPP) with different numbers (4, 2 and 0) of active pyridine groups (i.e. uncoordinated pyridine nitrogen atoms). The electrocatalytic test results show that with the decrease of the number of active pyridine groups, the CO₂RR performance is gradually reduced, mainly showing the reduction of highest FE_CO (99.8%, 83.7% and 25.6%, respectively). The crystallographic, experimental and theoretical evidences prove that the CO₂RR activity is more likely derived from uncoordinated pyridine nitrogen than the electrocatalytic inert metal nickel in porphyrin center. This work serves as an important case study for the identification of electrocatalytic activity of pyridine-containing materials in CO₂RR by simple supramolecular model system.  相似文献   

Classroom conditions to secure enjoyment and achievement: the pupils' voice. Listening to the voice of Every child matters     

Elizabeth A. Hopkins 《Education 3-13》2013,41(4):393-401

This paper argues that pupil voice and the active engagement of pupils in shaping their own educational experience are integral to the success of the ‘Enjoy and Achieve’ strand of the Every child matters: Change for children programme. Through accessing the voice of Key Stage 2 pupils, insight was gained into what pupils believe to be the ideal ‘classroom conditions’ which enable them to enjoy and achieve at school. Pupil voice was accessed using an innovative form of group interview incorporating an Ishikawa or fishbone tool. The data was collected from 180 pupils, from Years 3–6 (aged 7–11) in a UK Junior school. The findings identify eight ‘classroom conditions’ which pupils see as being critical for them to be able to enjoy and achieve at school. Two of these ‘classroom conditions’ do not appear to be supported by previous research.  相似文献   

基于J2EE平台的网络辅助教学系统的设计与构建     

付玮 《科技广场》2008,(3):161-162

本文介绍了J2EE体系结构和技术框架,研究了网络辅助教学系统的实现目标及网络教学平台构建的策略。  相似文献   

Discussion on P2P Flow Inspection Technology     

Kuang Lin 《科技广场》2008,(12)

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