Laboratory assessment in chemistry: an analysis of the adequacy of the assessment process     

Anna Prades  Sebastían Rodríguez Espinar 《Assessment & Evaluation in Higher Education》2010,35(4):449-461

The requirement that universities prepare students in practical competences, and assess the extent to which pre‐established objectives are achieved, is generally accepted to be of growing importance. As a result, on one hand, there is an increasing volume of research related to task performance in assessment. On the other hand, there are comparatively few studies which analyse the assessment process in a laboratory context. The laboratory offers itself as an educational and training tool of some importance, both in chemistry and in the experimental sciences in general. Studies which have been carried out to date into the importance of laboratory work as a source of value added have, however, been far from conclusive. This research uses interviews with laboratory teachers to analyse the typology of the competences which enter the assessment process, and to determine the extent to which the laboratory assessment process complies with standard validity requirements. Results obtained show that laboratory assessment in chemistry allows for a valuation of the degree of integration of theory and practice, and of the level of development of professional competence in the laboratory. Current assessment strategies do not, however, include all the competences developed in the laboratory context, nor are they sufficiently reliable to offer accreditation of those that are assessed.  相似文献   

公司股东除名法律问题研究     

朱培安  张玲玲 《北京教育学院学报》2010,(5):70-75

妥善处理公司内部冲突是公司法的一项基本功能。股东除名制度作为一项司法解散的替代制度,对于解决公司内部冲突,维护公司作为一种实体的持续存在具有不可替代的作用,因此受到国外很多国家的青睐,已成为解决公司股东内部冲突的一项必不可少的制度。然而,我国现行公司法却没有对该制度进行规定,当股东无正当理由不履行自己对公司的义务,严重损害了公司的利益及公司其他大多数股东的利益时,其他股东除了要求其履行义务,承担损害赔偿责任外,并没有其他有效的救济途径。当公司出现僵局时,往往通过解散公司的方式来解决,这对希望公司继续存续的股东来说,显然不是最好的选择,也不能实现公司设立的初衷,更是对资源的一种浪费,因此,确立股东除名制度就成为现实的需要。回应此需要,本文从理论上的可行性和现实中的必要性对股东除名制度进行了分析,并提出了构建我国公司股东除名制度的设想,以期对未来公司立法有所助益。  相似文献   

The gap between expectations and reality: integrating computers into mathematics classrooms     

Bülent Güven  Ünal Çakiroğlu  Yaşar Akkan 《Asia Pacific Education Review》2009,10(4):505-515

As a result of dramatic changes in mathematics education around the world, in Turkey both elementary and secondary school mathematics curriculums have changed in the light of new demands since 2005. In order to perform the expected change in newly developed curriculum, computer should be integrated into learning and teaching process. Teachers’ beliefs play a key role in this integration process. Negative beliefs against using computer in mathematics teaching may lead to failure of this process. With the help of this study, it is aimed to detect mathematics teachers’ beliefs concerning Computer Assisted Mathematics Instruction (CAMI). Within the scope of this aim, the conducted questionnaire (The opinions of teachers about using computer in Mathematics Instruction) has been carried out on 91 mathematics teachers in the city of Trabzon. The acquired results have shown that mathematics teachers have developed negative opinions against CAMI. This state has revealed that there is a huge inconsistency between curriculum’s positive expectations arising from computer usage and teachers’ convictions.  相似文献   

Academic procrastination and motivation of adolescents in Turkey     

Robert M. Klassen  Elçin Kuzucu 《教育心理学》2009,29(1):69-81

This article presents a study of academic procrastination and associated motivation variables in 508 adolescents from a general secondary school in central Turkey. Girls reported higher levels of self‐efficacy for self‐regulation and predicted higher Turkish grades than boys, but there was no difference in levels of procrastination. Academic self‐efficacy was a stronger predictor of procrastination for girls than for boys, but for both groups self‐efficacy for self‐regulation was the strongest predictor of procrastination. Most participants (83%) reported spending one hour or more procrastinating per day, with writing tasks the most prone to procrastination for boys and girls. When procrastinating, Turkish adolescent boys were more likely to spend time with electronic media (watching TV, emailing, going on‐line, and, in particular, playing computer games), whereas girls were most likely to read books, magazines, and newspapers. The article concludes with implications for researchers, and also for parents and educators of adolescents.  相似文献   

Subspace-based spectrum estimation in innovation models by mixed norm minimization     

Hüseyin Akçay  Semiha Türkay 《Journal of The Franklin Institute》2019,356(5):3169-3186

In this paper, identification of discrete-time power spectra of multi-input/multi-output (MIMO) systems in innovation models from output-only time-domain measurements is considered.A hybrid identification algorithm unifying mixed norm minimization with subspace estimation method is proposed. The proposed algorithm first estimates a covariance matrix from measurements. A significant dimension reduction is achieved in this step. Next, a regularized nuclear norm optimization problem is solved to enforce sparsity on the selection of most parsimonious model structure. A modification of the covariance estimates in the proposed algorithm generates yet another algorithm capable of handling data records with sequentially and intermittently missing values. The new and the modified identification algorithms are tested on a numerical study and a real-life application example concerned with the estimation of joint power spectral density (PSD) of parallel road tracks.  相似文献   

Knowledge sharing and team trustworthiness: it's all about social ties!     

Jaw-Kai?WangEmail author  Melanie?Ashleigh  Edgar?Meyer 《知识管理研究与实践》2006,4(3):175-186

This paper empirically examines knowledge sharing within innovation teams and explores the relationship between knowledge sharing and trust. This relationship has generally been identified in the literature as an important aspect of knowledge management. However, its pertinence to knowledge transfer within and between teams is less obvious. The case study based on four information technology R&D teams in Taiwan suggests that trust between a knowledge holder and a receiver may not exist. In fact, it can be connected by a mediator, although the use of social relationship in which trust is rooted in both host and visitor's trust of the mediator. Thus, trust may be substituted by the social relationship in certain specific contexts.  相似文献   

IT-based banking services: Evaluating operating and profit efficiency at bank branches     

Napapan Meepadung  John C.S. Tang  Do Ba Khang 《The Journal of High Technology Management Research》2009,20(2):145-152

Data envelopment analysis (DEA) is an ideal tool to assess a bank branch's operating and profit efficiency. This study went a step further to also explore the impact of IT-based retail banking services on branch efficiency, and found that IT-based transactions at the branch level have a significant impact on profit efficiency, and therefore have a significant role to play in profit maximization. Improving bank branch technology to best support service delivery is also a practical way to achieve greater efficiency, which in turn, contributes to a commercial bank's overall profitability.  相似文献   

“编”、“编辑”辞义辨析     

魏立安 《陕西师范大学学报(哲学社会科学版)》2000,29(1):170-172

编、编辑、编撰、编纂是编辑学的基本概念。从产生的渊源及演变过程考证,“编”字起源于殷商时代,“编辑”一词产生于隋唐时期;“编辑”与“编纂”虽可互训,但“编纂”的含义更具体。“编辑”一词在古代和现代意义上虽一脉相承,但仍有微妙变化。  相似文献   

足球运动员战术意识活动的基本特征分析   总被引：19，自引：0，他引：19  

张廷安 《西安体育学院学报》2000,17(3):37-39,43

笔者从不同的侧面对足球运动员的战术意识活动的基本特征进行了深入的分析 ,揭示了战术意识活动具有自觉目的性、对抗性、择优性等基本特质。旨在为广大教练员和运动员在今后的训练中更有效地促进战术意识水平的提高提供了十分有益的理论指导。  相似文献   

论古今字的意义是否相等          下载免费PDF全文

曹国安 《惠州学院学报》2000,20(3):54-56

传统观点认为, 古今字的意义范围不相等, 即古字的意义范围大于今字。本文通过严格界定古字(以及今字) 的内涵, 提出并论证了古今字的意义范围相等的观点, 批判了传统观点。  相似文献