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1.
根据2005-2010年能源消费数据及相关经济数据,分析了河北省能源消耗强度的时空变化特征;运用Laspeyres指数及其分解模型将河北省能源消耗强度的影响因素分解为结构因素和效率因素。结果表明:研究期内河北省能源消耗强度稳步下降,但空间差异较大;研究期能源消耗强度降低主要贡献因素是第二产业能源利用效率的提高;相对于效率份额,结构份额对能源消耗强度的影响很小,研究期内产业结构变动对能源消耗强度降低的总体影响是负面的。  相似文献   

2.
国际社会和我国政府对温室气体,尤其是二氧化碳(CO2)的排放非常重视。运用卡亚公式能找出影响CO2排放量的主要因素,为了解各因素对我国CO2排放量变化的具体影响,运用完全分解模型对CO2排放量变化的影响进行分解分析,结果发现:在1990—2006年,对我国CO2排放量增大起正作用的依次是人均GDP、人口数量、密度,起副作用的是能源强度;要减少我国的CO2排放量,必须控制人口规模、改善产业结构、能源结构和推动节能减排技术的发展。  相似文献   

3.
This study tests a hypothesized learning progression for the concept of energy. It looks at 14 specific ideas under the categories of (i) Energy Forms and Transformations; (ii) Energy Transfer; (iii) Energy Dissipation and Degradation; and (iv) Energy Conservation. It then examines students’ growth of understanding within each of these ideas at three levels of increasing conceptual complexity. The basic level of the model focuses on simple energy relationships and easily observable effects of energy processes; the intermediate level focuses on more complex energy concepts and applications; and the advanced level focuses on still more complex energy concepts, often requiring an atomic/molecular model to explain phenomena. The study includes results from 359 distractor‐driven, multiple‐choice test items administered to over 20,000 students in grades 4 through 12 from across the U.S. Rasch analysis provided linear measures of student performance and item difficulty on the same scale. Results largely supported a model of students’ growth of understanding that progresses from an understanding of forms and transformations of energy to energy transfer to conservation while also progressing along a separate dimension of cognitive complexity. An analysis of the current state of students’ understanding with respect to the knowledge identified in the learning progression showed that elementary level students perform well in comparison to expectations but that middle and high school students’ performance does not meet expectations. © 2017 Wiley Periodicals, Inc. J Res Sci Teach 55: 68–93, 2018  相似文献   

4.
The existing oil import dependence index cannot exactly measure the economic cost or scales, and it is difficult to describe the economical aspect of oil security. To measure the foreign dependence of one country's economy and reflect its oil economic security, this paper defines the net oil import intensity as the ratio of net oil import cost to GDP. By using Divisia Index Decomposition, the change of net oil import intensity in five industrialized countries and five newly industrialized countries during 1971—2010 is decomposed into five factors: oil price, oil intensity, oil self-sufficiency, domestic price level and exchange rate. The result shows that the dominating factors are oil price and oil intensity; moreover, the newly industrialized countries have higher net oil import intensity than industrialized countries.  相似文献   

5.
ABSTRACT.

The authors sought to determine if an urban school district's effort to fundamentally change teaching, assessment, and intervention practices increased student achievement and decreased achievement variation among classrooms in 11 high schools. They examined Grade 11 mathematics achievement data from the 2009–2010 and 2010–2011 Kentucky Core Content Test. The sample consisted of 2,451 students in 11 high schools that implemented an initiative called Project Proficiency. The study used hierarchical linear modeling to determine if changes in instructional practices yielded academic gains, while controlling for individual and school socioeconomic status (SES) and prior student achievement. The analysis revealed that Project Proficiency had a significant impact on state mathematics achievement and reduced classroom variation by 55% in the final model, as opposed to 16% in the control group. Results also indicated that a school's SES had a greater influence on student achievement than an individual student's SES.  相似文献   

6.
Our aims were to examine the efficacy of a new observational instrument ‘System for Observing Outdoor Play’ for detecting changes in outdoor play and chart the use of recycled and repurposed materials in the school playground during the course of an intervention to increase outdoor play. Children from one Sydney primary school were observed (N = 111; 5–12 years) using an observational instrument developed as part of the Sydney Playground Project. Data on types of activities and frequencies were collected at baseline and seven times during intervention. Use of intervention materials was consistently high and associated with increases in play-related activities (40–77%), while inactive pursuits decreased (52–31%), on average. The observational instrument proved efficacious in tracking changes in play. Modification of the school playground environment by introducing loose parts changed children’s play-related behaviour; the variety of activities increased, including construction and creative play. Physical inactivity decreased. Recycled materials can increase children’s creative, social and physical play.  相似文献   

7.
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8.
本文通过对楚雄市2002年农村能源现状及2002—2010年农村生活用能源建设规划分析，对2005年，2010年能源结构进行定量分析。对生态环境效益进行了定量分析，结果表明：经过8年农村能源建设，完全可以实现能源结构优化，其环境效益、生态经济效益非常显著。  相似文献   

9.
This paper examines the emergence of new accountabilities in teaching and teacher education in Ireland in the 15 years period 1997–2012. Framing accountability in terms of the three main approaches to it globally in education systems, that is, compliance with regulations, adherence to professional norms and attainment of results/outcomes, we identify significant changes, particularly, in compliance- and results-driven accountability. A ‘rising tide’ of accountability, due to the interrelated influences of the European higher education space, education legislation and professional self-regulation policies (i.e. Teaching Council), is evident since the late 1990s. This was punctuated by a ‘perfect storm’ in 2010 comprising ‘bad news’ from PISA 2009, the economic bailout and strategic leadership at a system level. The cumulative impact of the ‘rising tide’ and ‘perfect storm’ is evident in how they reframed both ‘to whom’ and ‘for what’ accountability in teacher education relates. Significantly, the new accountabilities in teaching and teacher education reflect a move towards the dominant global education reform movement (Sahlberg 2007) with its emphasis on standardisation, narrow focus on literacy and numeracy and higher stakes accountability.  相似文献   

10.
Graduates in the areas of Science and Technology are believed to have traditionally been employed in a number of specific industries, but the recent restructuring of some industries may have affected this phenomenon. In order to examine the trends concerning employment issues in more detail, a case study was conducted by surveying employment statistics for every five years between 1985 and 2010, of graduates from various departments of Science and Technology at a Japanese National University. In this period, the Japanese economy experienced a variety of changes which resulted in some leading Japanese universities with engineering programmes changing their emphasis from undergraduate studies to postgraduate studies. These influences were observed using employment statistics. According to the statistics representing degree levels and the ratios of job openings to applicants, the percentages of graduates employed by industry were compared using data measured at five year intervals. A shift in the employment of graduates can be observed. Employment of graduates of Master's degree courses increased twofold during the 1990s, and employment of Ph.D. course graduates increased significantly in the near term, while employment of Bachelor's degree holders decreased. The relationship between graduates of 13 departments and 21 types of industry was analysed using multiple correspondence analysis. Common two-dimensional scales such as basic-advanced science and technology, and broad-specific demand science and technology were extracted. Both factors of year and degree levels were also configured using the same figures. These configurations were compared between the years examined, and the changes in the structural relationships between degree levels, departments and industries were analysed. These results suggest that some industrial sectors have recently begun to require Master's or Doctoral level graduates from specific departments, though they had not strongly done so before. This also illustrates the relationship between university departments and industry with regard to human resource supply and demand.  相似文献   

11.
In this study, 188 master‐level students received training through a distance education course to conduct functional behavioral assessments (FBAs) and behavior support plans with 68 boys and six girls (aged 3–20 years) displaying persistent behavior problems in inclusive preschools, elementary, and secondary schools. In the course, master‐level students’ scores on an FBA knowledge test increased from 13.2% to 68.8% correct. Changes in pupils’ target behaviors were evaluated with a total of 114 AB single‐subject designs and combined data with one‐group pretest–posttest designs. Comparing medians of means, disruptive behaviors decreased by 77.8% and aggressive behaviors by 88.7%, whereas task engagement increased by 91.5% after intervention. Nonparametric Wilcoxon signed‐ranks tests for related samples showed that changes were statistically significant for all groups with sufficient sample sizes. Adjusted effect sizes ranged from d = .5 to 1.6. Results indicate that positive changes in student behavior problems can be attained with function‐based interventions conducted by teams trained through a distance education course.  相似文献   

12.
The American academic research enterprise relies heavily on contributions made by foreign nationals. Of particular note is the large number of international postdocs employed at universities in the United States (US). Postdocs are among the fastest growing group of academic staff in the US, and over 50 % of all postdocs in the US are temporary visa holders. While academic mobility is sometimes understood using a ‘push–pull’ model, we argue that demand for educational migrants must be considered. Drawing from Marginson’s (Handbook on globalization and higher education. Edward Elger, Northampton, 2011; Marginson and Rhoades in High Educ 43:281–309, 2002) work, we develop a model for assessing local, national, and institutional (or local) variables that may shape the employment of international postdocs at universities in the United States, and we operationalize the model through a panel regression analysis using data covering the period 1989–2009. We find that the passage of time and federally supported research and development expenditures are strong predictors of postdoc employment. Institutional characteristics predict changes only in the subsample of private universities.  相似文献   

13.
Medical education in mainland China has undergone massive expansion and reforms in the past decades. A nation-wide survey of the five-year clinical medicine programs aimed to examine the course hours, pedagogies, learning resources and teaching staff of anatomy both at present and over the past three decades (1990–1999, 2000–2009, and 2010–2018). The directors or senior teachers from 90 out of the 130 five-year clinical medicine programs were invited to fill out a factual questionnaire by email. Ultimately, sixty-five completed questionnaires were received from 65 different schools. It was found that the total number of gross anatomy course hours has decreased by 11% in the past 30 years and that systematic and regional anatomy have been increasingly taught separately among the surveyed medical schools. Problem-based learning has been adopted in thirty-five (54%) of the surveyed schools, and team-based learning is used in ten (15%) of the surveyed schools. The surveyed schools reported receiving more donated cadavers in recent years, with the average number increasing from 20.67 ± 20.29 in 2000–2009 to 36.10 ± 47.26 in 2010–2018. However, this has not resulted in a decrease in the number of students who needed to share one cadaver (11.85 ± 5.03 in 1990–1999 to 14.22 ± 5.0 in 2010–2018). A decreasing trend regarding the teacher-student ratio (1:25.5 in 2000–2009 to 1:33.2 in 2010–2018) was also reported. The survey demonstrated the historical changes in gross anatomy education in China over the past thirty years.  相似文献   

14.
Technology is important to all aspects of our lives, so helping students develop an accurate understanding of technology should be an educational goal at the K-12 level. Assessments are important tools in reaching this goal. We developed an instrument to measure the technology conceptions of children ages 8–11, the ‘What is Technology’ (WT) instrument. We gathered evidence for the validity of using the WT instrument to measure children's conceptions of technology, including changes due to an intervention, and we describe those changes. We used exploratory factor analysis (EFA) to establish scales, and confirmatory factor analysis (CFA) with new samples of subjects to confirm our hypothesised model of children's conceptions. For further evidence, we analyzed and coded the written responses children gave to open-ended questions asking them to explain their understanding of technology, then calculated correlations between these codes and the CFA-confirmed scale measures. We found that children tend to think of technology as artifacts that are powered by electrical energy; however, after instruction most children's conceptions become more consistent with definitions given in educational standards. The instrument is shown to be valid and reliable for its intended use, to assess preadolescent children's conceptions of technology, and evaluate the impact of an intervention.  相似文献   

15.
Improving the quality of Bachelor’s and Master’s theses while at the same time increasing the number of theses without expanding the existing resources proportionately is a huge challenge faced by higher educational institutions. The aim of this study is to investigate the effect of multiple change processes on Bachelors and Masters level thesis work in a selected higher educational institution. The following research questions were studied: (1) How has the thesis quality changed? (2) How has the number of completed theses changed? and, (3) How has the ratio of completed theses per supervisor changed? The change processes were introduced into the thesis process in the Department of Computer and Systems Sciences (DSV), Stockholm University during 2008–2014. The results show that the quality and the number of completed theses have significantly increased. The multiple change processes including a purpose built ICT system named SciPro, which was introduced and improved incrementally during 2010–2014 are discussed and evaluated in relation to these results.  相似文献   

16.
《Africa Education Review》2013,10(3):595-609
Abstract

Despite being minority religious communities in the Southern African region, Muslims have carved out for themselves a unique identity within a multi-ethnic, multi-linguistic, and a multi-religious region. As a result of the variety of Muslim education programs and institutions that the community had set up over the past few decades its representatives made an interesting contribution towards the region. In the discipline of ‘Islamic Studies’, which began as a minor subject within the field of Oriental and Missiological studies respectively at the beginning of the 1960s, underwent remarkable changes by the mid 1970s and the beginning of the 1980s when fully-fledged programs were designed and mounted at specific Southern Africa's universities. The continuities and changes that took place from the mid 1970s onwards were as a result of the growing interest in this discipline. The essay's objective is to discuss the study and research of ‘Islam’ undertaken by individuals in the Southern Africa with special focus on South Africa where there have been major developments in the Muslim educational circles for more than a half a century (circa 1960–2010); it, however, employs ‘identity’ as a significant analytical tool in scholarship and the production of knowledge about Islam within the Southern African context.  相似文献   

17.
Since 1992, the UK Government has published so‐called ‘school league tables’ summarising the average General Certificate of Secondary Education (GCSE) ‘attainment’ and ‘progress’ made by pupils in each state‐funded secondary school in England. While the headline measure of school attainment has remained the percentage of pupils achieving five or more good GCSEs, the headline measure of school progress has changed from ‘value‐added’ (2002–2005) to ‘contextual value‐added’ (2006–2010) to ‘expected progress’ (2011–2015) to ‘progress 8’ (2016–). This paper charts this evolution with a critical eye. First, we describe the headline measures of school progress. Second, we question the Government's justifications for scrapping contextual value‐added. Third, we argue that the current expected progress measure suffers from fundamental design flaws. Fourth, we examine the stability of school rankings across contextual value‐added and expected progress. Fifth, we discuss the extent to which progress 8 will address the weaknesses of expected progress. We conclude that all these progress measures and school league tables more generally should be viewed with far more scepticism and interpreted far more cautiously than they have often been to date.  相似文献   

18.
通过构建高等教育-人口-经济系统协调发展评价的指标体系,选取全国31个省市自治区2005年和2010年的截面数据,采用主成分分析、有序度、协调度模型测算等方法,着重从发展水平、单个系统有序度及系统间协调度三个维度进行定量分析。结果表明:区域高等教育发展差异显著,高等教育、经济系统的发展水平相对高于人口系统;各系统的整体有序度略有提升,经济系统有序度最高,高等教育次之,人口系统最低;区域三系统间的协调度差距悬殊,高等教育-经济系统的协调度明显高于高等教育-人口系统的协调度。建议从高等教育与经济、高等教育与人口及高等教育-人口-经济系统的协调演化三方面考虑消除不协调因素,促进高等教育与人口、经济的良性循环和协调发展。  相似文献   

19.
The paper assesses the evolution of efficiency of Italian public universities for the period 2000–2010. It aims at investigating whether their levels of efficiency showed signs of convergence, and if the well-known disparity between northern and southern regions decreased. For this purpose, we use a refinement of data envelopment analysis, namely window analysis, which allows for measuring efficiency in cross-sectional and time-varying data. We find that the efficiency of most universities registered only marginal changes in the period, although a notable re-ranking occurred. However, changes in the management of universities, consequential to the reform processes, did not affect the long-run tendencies, such as the persisting difference in performance between north and south.  相似文献   

20.
The objective of this study was to identify trajectories of school improvement experienced by Chilean elementary schools over the last decade. Using econometric analysis and controlling for potential confounding factors, we created an index of school performance combining outcome indicators focused on different school dimensions, and estimated the 2002/2010 evolution of school improvement for all Chilean schools with available data. Broadly, we estimated an average increase in the school performance of about 0.19 SD; nevertheless, while 41% of the schools increased their educational performance by at least 0.1 SD, 25% of the schools decreased it during the same period; we also found that improving school effectiveness was more probable among schools with lower student socioeconomic status (SES). Finally, we found that the observed school improvement trajectories tended to be non-linear; thus, we estimated that only 13.4% of the schools improved their performance in a systematic way during the entire decade.  相似文献   

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