加入WTO与我国少数民族人才培养     

萨茹拉  曹仁祥 《民族教育研究》2003,14(2):34-36

目前我国少数民族地区总体教育水平相对落后，各类人才总量不多、水平不高。加入WTO对少数民族人才培养提出了更高的要求。少数民族地区人才培养的现念要更新，要进一步明确人才培养的层次与目标，建立多层次的人才培养网络，并加大中央财政对少数民族地区人才培育的投入。  相似文献   

Reordering and Reflecting Factors for Simulation Studies With Exploratory Factor Analysis     

Nicholas D. Myers  Soyeon Ahn  Min Lu  Seniz Celimli  Cengiz Zopluoglu 《Structural equation modeling》2017,24(1):112-128

This article describes the REREFACT R package, which provides a postrotation algorithm that reorders or reflects factors for each replication of a simulation study with exploratory factor analysis (EFA). The purpose of REREFACT is to provide a general algorithm written in freely available software, R, dedicated to addressing the possibility that a nonuniform order or sign pattern of the factors could be observed across replications. The algorithm implemented in REREFACT proceeds in 4 steps. Step 1 determines the total number of equivalent forms, I, of the vector of factors, η. Step 2 indexes, i = 1, 2 … I, each equivalent form of η (i.e., ηⁱ) via a unique permutation matrix, P (i.e., Pⁱ). Step 3 determines which ηⁱ each replication follows. Step 4 uses the appropriate Pⁱ to reorder or re-sign parameter estimates within each replication so that all replications uniformly follow the order and sign pattern defined by the population values. Results from two simulation studies provided evidence for the efficacy of the REREFACT to identify and remediate equivalent forms of η in models with EFA only (i.e., Example 1) and in fuller parameterizations of exploratory structural equation modeling (i.e., Example 2). How to use REREFACT is briefly demonstrated prior to the Discussion section by providing annotations for key commands and condensed output using a subset of simulated data from Example 1.  相似文献   

负载指数法在内蒙古各盟市水资源承载力评价中的应用     

晓兰  萨础日拉  李轩然 《唐山学院学报》2016,29(6):25-30

运用负载指数法对内蒙古各盟市水资源的开发前景进行了对比研究。结果表明:由于内蒙古自治区各盟市人口数量、降水量、水资源分布以及经济发展程度不同,导致其水资源开发利用程度也不一样,存在着明显的空间差异。但是整体来看,除了呼伦贝尔市,各个盟市的水资源开发利用程度都比较高、开发利用潜力比较低,开发条件很不乐观。因此,应该从社会、经济、环境整体系统出发,合理利用水资源,努力改善水环境。  相似文献   

豆科黄华属植物种子表面特征的研究     

萨仁  陈家瑞 《中国科学院研究生院学报》2000,38(6):582-587

 在扫描电镜下观察了豆科黄华属Thermopsis 18种植物种子的表面纹饰,发现 T．alpina,T.bar- bata,T．inflata,T．lupinoides,T. licentiana,T.smithiana和T．turkestanica的种子表面为粗网状,T californica,T.divaricarpa,T. macrophylla,T．mollis的种子表面为细网状,T.gracilis,T.montana,T. fabacea的种子表面为相对平滑型纹饰,T．alterniflora的种子表面为不规则条形,T．chinensis的种子表 面为粘膜状,T.rhombifolia的种子表面为条形及 T．viuosa的种子表面为碎屑状纹饰。结果表明黄华属的种子表面特征对属下类群的划分有一定意义,对澄清某些混乱的种有一定价值。  相似文献   

Meta-analysis in the social sciences:     

Bruce E. Wampold  Hyunnie Ahn  Dongmin Kim 《Asia Pacific Education Review》2000,1(1):67-74

Meta-analysis is a class of statistical methods for combining the results from a series of studies addressing the same research question. These methods can powerfully test hypotheses that cannot be answered clearly with one or a few studies and eliminates the ambiguity that results from narrative reviews of a research literature or from counting the number of studies that support a particular conclusion. The usefulness of meta-analysis is demonstrated by reviewing instances in psychotherapy, education, and medicine that show how meta-analysis was used successfully to end acrimonious debate and reach a firm and lasting conclusion.  相似文献   

An evaluation of adaptive filtering in the context of realistic task-based information exploration     

Daqing He  Peter Brusilovsky  Jaewook Ahn  Jonathan Grady  Rosta Farzan  Yefei Peng  Yiming Yang  Monica Rogati 《Information processing & management》2008

Exploratory search increasingly becomes an important research topic. Our interests focus on task-based information exploration, a specific type of exploratory search performed by a range of professional users, such as intelligence analysts. In this paper, we present an evaluation framework designed specifically for assessing and comparing performance of innovative information access tools created to support the work of intelligence analysts in the context of task-based information exploration. The motivation for the development of this framework came from our needs for testing systems in task-based information exploration, which cannot be satisfied by existing frameworks. The new framework is closely tied with the kind of tasks that intelligence analysts perform: complex, dynamic, and multiple facets and multiple stages. It views the user rather than the information system as the center of the evaluation, and examines how well users are served by the systems in their tasks. The evaluation framework examines the support of the systems at users’ major information access stages, such as information foraging and sense-making. The framework is accompanied by a reference test collection that has 18 tasks scenarios and corresponding passage-level ground truth annotations. To demonstrate the usage of the framework and the reference test collection, we present a specific evaluation study on CAFÉ, an adaptive filtering engine designed for supporting task-based information exploration. This study is a successful use case of the framework, and the study indeed revealed various aspects of the information systems and their roles in supporting task-based information exploration.  相似文献   

Rethinking XML-enabled agile supply chains     

Hyung Jun Ahn  Paul Childerhouse  Gottfried Vossen  Habin Lee 《International Journal of Information Management》2012

This paper critically discusses the use of Extensible Markup Language (XML) for agile supply chains and proposes practical guidelines and future research directions for the field. XML has been identified by many as a prominent technology for enabling electronic supply chain integration, but the adoption of it in the industry has been rather slow and limited. This paper discusses the factors that enable agility in supply chains, and explains why XML is the best candidate for facilitating such factors. Then the major XML-based integration initiatives such as ebXML, RosettaNet, and Web Services are diagnosed in terms of their pros and cons for supply chain agility, as well as the reasons for their slow diffusion. Based on the discussion, this paper proposes that: the integration efforts need to first focus on the industries that need agility; stringent business process standards are necessary; and implementation should be made much easier and more affordable for small and medium enterprises (SMEs). Further research issues are also suggested based on the discussion.  相似文献   

Increasing Diversity in Science and Health Professions: A 21-Year Longitudinal Study Documenting College and Career Success     

Marilyn A. Winkleby  Judith Ned  David Ahn  Alana Koehler  Jeanne D. Kennedy 《Journal of Science Education and Technology》2009,18(6):535-545

Despite decades of precollege science education programs, African Americans, Latinos, and Native Americans remain critically underrepresented in science and health professions. This report describes college and career outcomes among graduates of the Stanford Medical Youth Science Program (SMYSP), a 5-week summer residential program for low-income high school students among whom 97% have been followed for up to 21 years. Approximately 24 students are selected annually, with participation limited to low-income students who have faced substantial personal hardships. Undergraduate and medical students provide key program leadership and training. The curriculum is based on science inquiry education and includes hospital internships, anatomy practicums, research projects, faculty lectures, college admissions/standardized test preparation, and long-term college and career guidance. A total of 476 high school students participated between 1988 and 2008, with 61% from underrepresented ethnic minority groups. Overall, 78% of African American, 81% of Latino, and 82% of Native American participants have earned a 4-year college degree (among those admitted to college, and excluding those currently attending college). In contrast, among 25–34-year old California adults, 16% of African Americans, 8% of Latinos, and 10% of Native Americans earn a 4-year college degree. Among SMYSP’s 4-year college graduates, 47% are attending or have completed medical or graduate school, and 43% are working as or training to become health professionals. SMYSP offers a model that expands inquiry-based science education beyond the classroom, and recognizes the role of universities as “high school interventionists” to help diversify health professions.  相似文献   

A Controlled Evaluation of a High School Biomedical Pipeline Program: Design and Methods     

Marilyn A. Winkleby  Judith Ned  David Ahn  Alana Koehler  Kathleen Fagliano  Casey Crump 《Journal of Science Education and Technology》2014,23(1):138-144

Given limited funding for school-based science education, non-school-based programs have been developed at colleges and universities to increase the number of students entering science- and health-related careers and address critical workforce needs. However, few evaluations of such programs have been conducted. We report the design and methods of a controlled trial to evaluate the Stanford Medical Youth Science Program’s Summer Residential Program (SRP), a 25-year-old university-based biomedical pipeline program. This 5-year matched cohort study uses an annual survey to assess educational and career outcomes among four cohorts of students who participate in the SRP and a matched comparison group of applicants who were not chosen to participate in the SRP. Matching on sociodemographic and academic background allows control for potential confounding. This design enables the testing of whether the SRP has an independent effect on educational- and career-related outcomes above and beyond the effects of other factors such as gender, ethnicity, socioeconomic background, and pre-intervention academic preparation. The results will help determine which curriculum components contribute most to successful outcomes and which students benefit most. After 4 years of follow-up, the results demonstrate high response rates from SRP participants and the comparison group with completion rates near 90 %, similar response rates by gender and ethnicity, and little attrition with each additional year of follow-up. This design and methods can potentially be replicated to evaluate and improve other biomedical pipeline programs, which are increasingly important for equipping more students for science- and health-related careers.  相似文献   

The effects of physical activity and physical fitness on children's achievement and cognitive outcomes: a meta-analysis     

Fedewa AL  Ahn S 《Research quarterly for exercise and sport》2011,82(3):521-535

It is common knowledge that physical activity leads to numerous health and psychological benefits. However; the relationship between children's physical activity and academic achievement has been debated in the literature. Some studies have found strong, positive relationships between physical activity and cognitive outcomes, while other studies have reported small, negative associations. This study was a comprehensive, quantitative synthesis of the literature, using a total of 59 studies from 1947 to 2009 for analysis. Results indicated a significant and positive effect of physical activity on children's achievement and cognitive outcomes, with aerobic exercise having the greatest effect. A number of moderator variables were also found to play a significant role in this relationship. Findings are discussed in light of improving children's academic performance and changing school-based policy.  相似文献