Reducing the Odds: Preventing Perinatal Transmission of HIV in the United States     

Patricia E. Conejo 《The Journal of perinatal education》2000,9(3):40-41

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Transmission line realization of subwavelength resonator formed by a pair of conventional and LHM slabs     

姜田  冯一军 《浙江大学学报(A卷英文版)》2006,7(1):76-80

INTRODUCTION Left-handed materials (LHMs), first investigated theoretically by Veselago (1968), have received sub- stantial attention in the scientific and engineering communities. The unique properties of these meta- materials are promising for a diversity of microwave applications, such as new types of beam steerers, modulators, filters, superlens (Pendry, 2000), cou- plers and antenna radoms (Smith et al., 2004). Re- cently, a transmission line (TL) approach has been successfully in…  相似文献   

Does the “Pupil Enterprise Programme” Influence Grades Among Pupils With Special Needs?     

Vegard Johansen  Hege M. Somby 《Scandinavian Journal of Educational Research》2016,60(6):736-745

This paper asks whether the Pupil Enterprise Programme (PEP) is a suitable working method for improving academic performance among pupils with special needs. Overall, 20% of pupils participate in PEP at some point during lower secondary school. Results from multilevel regression modelling indicate that pupils with special needs who have participated in PEP attain better grades in Written Norwegian and Mathematics than those pupils with special needs who did not participate in PEP. The difference between PEP participants and non-participants in Written English was insignificant. The positive results for Norwegian and Mathematics seem to be related to the organisation and content of PEP. The data are from a study of 1,880 pupils in the 10th Grade.  相似文献   

中国商业银行利率竞争分析     

顾翌乐  陈湛匀 《上海大学学报(英文版)》2003,7(4):418-424

1　Introduction　Theobjectiveofthisstudyistoexaminecompeti tionenvironmentforinterestrateandtopreviewthecompetitiontrendsaftertheinterestratehasbeenful lyliberalizedinChina .Underthedominantfixedin terestrate ,almostnorealcompetitionregardingin terestratehadeveroccurredamongcommercialbanksinChinauntilveryrecentlywhentheinterestratelib eralizationreformhasbeenunderwaysince 2 0 0 0 .Tostudythecompetition ,thepaperisstructuredasfol lows .Section 2 providesaquantitativeexaminationoftheenvironment…  相似文献   

The vicissitudes of measurement: a confirmatory factor analysis of the Emotional Autonomy Scale     

Schmitz MF  Baer JC 《Child development》2001,72(1):207-219

This study examined the factor structure of the Emotional Autonomy Scale (EAS) as proposed by Steinberg and Silverberg. Participants were from three independent samples of adolescents in grades 6 (n = 1,842), 8 (n = 1,769), and 10 (n = 1,232), with each sample consisting of three ethnic groups: African American, European American, and Mexican American. None of the confirmatory factor analyses for these samples supported the factor structure proposed by Steinberg and Silverberg. From the three models tested, the EAS is best described by the four originally proposed factors, combined with two method factors, one consisting of the positively worded scale items and one consisting of the negatively worded scale items. Results show that the EAS exhibits poor construct validity and behaves quite differently for the different grade and ethnic groups. The strong impact of method variance on the factor structure is discussed. Although various alternative solutions to the psychometric problems in the EAS are proposed, the most credible solution may be to reexamine the conceptual foundations of emotional autonomy and develop better measures of those concepts for adolescents.  相似文献   

优化问题的新步长法则     

吴庆军  韦增欣 《上海大学学报(英文版)》2007,11(2):135-141

The step-size procedure is very important for solving optimization problems. The Armijo step-size rule, the Armijo-Goldstein step-size rule and the Wolfe-Powell step-size rule are three well-known line search methods. On the basis of the above three types of line search methods and the idea of the proximal point methods, a new class of step-size rules was proposed. Instead of a single objective function f, f ＋1/2（x - xk）^TBk（x-Xk） was used as the merit function in iteration k, where Sk is a given symmetric positive definite matrix. The existence of the steplength for the new rules was proved. Some convergence properties were also discussed.  相似文献   

Help‐Seeking and Non‐Help‐Seeking Students' Perceptions of Own and Peers' Mental Health Functioning     

Bruce S. Sharkin  Paula M. Plageman  Lisa P. Coulter 《Journal of College Counseling》2005,8(1):65-73

Help‐seeking (HS) students and non‐help‐seeking (NHS) students were compared on their perceptions of (a) their own level of mental health functioning and (b) the average level of mental health functioning of their (NHS or HS) peers. Results showed that NHS students' perceptions of HS students' self‐ratings were similar to HS students' self‐ratings of functioning but that HS students underestimated the level of functioning of their NHS peers. Implications of the findings for campus outreach and future research are discussed.  相似文献   

Multiple Dimensions of Instructional Effectiveness in Reading: A Review of Classroom Observation Studies and Implications for Special Education Classrooms     

Yujeong Park  Mary T. Brownell  Elizabeth F. Bettini  Amber E. Benedict 《Exceptionality》2019,27(1):1-17

The purpose of this study was to review and analyze effective classroom reading practices for early graders, using information gathered from the existing content-general and content-specific observation protocols measuring teachers’ classroom reading practices. Dimensions and constructs from 28 observation studies were synthesized to identify classroom instructional practices that have positive impacts on student achievement. Findings revealed that (a) instructional support, emotional support, and classroom management have positive impacts on student achievement, (b) the degree to which instructional practices are effective depends on students’ particular learning needs, and (c) students’ entering skills and primary language are associated with instructional effectiveness in reading. Challenges and implications for future research on effective instructional strategies for special education and the development of an observational protocol for special education teacher effectiveness are discussed.  相似文献   

Developing self-awareness using mindfulness meditation with preservice teachers: reflections on practice     

Mi-Hwa Park  Jeanetta G. Riley  Jessica M. Branch 《Journal of Early Childhood Teacher Education》2020,41(2):183-196

ABSTRACT

Mindfulness offers a pathway for preservice teachers to develop self-awareness, which is an essential part of personal and professional growth. However, supporting teacher self-awareness is rarely given much attention in teacher education programs. The authors studied the use of mindfulness meditation in an early childhood college course with early childhood preservice teachers. This article reports the main findings that emerged from the students’ journals regarding the mindfulness meditation. Reflecting on the findings, this article suggests that educators need to provide meaningful learning experiences and activities, which could help their students develop the personal qualities necessary to teach with high self-confidence.  相似文献   

Super-proximity routing in structured peer-to-peer overlay networks     

吴增德  饶卫雄  马范援 《浙江大学学报(A卷英文版)》2004,5(1):16-21

Peer-to-Peer systems are emerging as one of the most popular Internet applications. Structured Peer-to-Peer overlay networks use identifier based routing algorithms to allow robustness, load balancing, and distributed lookup needed in this environment. However, identifier based routing that is independent of Internet topology tends to be of low efficiency. Aimed at improving the routing efficiency, the super-proximity routing algorithms presented in this paper combine Internet topology and overlay routing table in choosing the next hop. Experimental results showed that the algorithms greatly improve the efficiency of Peer-to-Peer routing.  相似文献