Local Lyapunov Exponents and characteristics of fixed／periodic points embedded within a chaotic attractor     

ALI M  SAHA L.M 《浙江大学学报(A卷英文版)》2005,6(4):296-304

A chaotic dynamical system is characterized by a positive averaged exponential separation of two neighboring trajectories over a chaotic attractor. Knowledge of the Largest Lyapunov Exponent λ1 of a dynamical system over a bounded attractor is necessary and sufficient for determining whether it is chaotic (λ1＞0) or not (λ1≤0). We intended in this work to elaborate the connection between Local Lyapunov Exponents and the Largest Lyapunov Exponent where an altemative method to calculate λ1has emerged. Finally, we investigated some characteristics of the fixed points and periodic orbits embedded within a chaotic attractor which led to the conclusion of the existence of chaotic attractors that may not embed in any fixed point or periodic orbit within it.  相似文献   

Tertiary education in small states: Planning in the context of globalization     

Ali Ait Si Mhamed 《International Review of Education/Internationale Zeitschrift für Erziehungswissenschaft/Revue internationale l'éducation》2012,58(4):577-579

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Double standards: when an undergraduate dissertation becomes the object of two different assessment approaches     

David Starr‐Glass  Tanweer Ali 《Assessment & Evaluation in Higher Education》2012,37(2):179-192

Within a transnational educational programme, students residing in the Czech Republic obtain baccalaureate degrees from an accredited American college. The college has a distinctive approach towards learning, co‐creation of knowledge and the use of mentors. Part of the degree assessment is an undergraduate dissertation, which serves as a capstone experience. The Czech partner instituted a policy whereby students could obtain a second local degree by, among other things, using the same dissertation. This study examines the situation confronting mentors from the American college. It considers assessment as an integral component of a constellation of educational assumptions and pedagogic values: a paradigm. It analyses the competing/conflicting, paradigms involved and discusses ways in which educational practice was reconsidered and changed to allow a single work product to be authentically and meaningfully assessed under both approaches.  相似文献   

Iranians’ contribution to world literature on neuroscience     

Farzad Ashrafi  Hafez Mohammadhassanzadeh  Farhad Shokraneh  Ali Valinejadi  Karim Johari  Nazanin Saemi  Alireza Zali  Niloofar Mohaghegh  Hassan Ashayeri 《Health information and libraries journal》2012,29(4):323-332

Objective: The purpose of this study is to analyse Iranian scientific publications in the neuroscience subfields by librarians and neuroscientists, using Science Citation Index Expanded (SCIE) via Web of Science data over the period, 2002–2008. Methods: Data were retrieved from the SCIE. Data were collected from the ‘subject area’ of the database and classified by neuroscience experts into 14 subfields. To identify the citation patterns, we applied the ‘impact factor’ and the ‘number of publication’. Data were also analysed using HISTCITE, Excel 2007 and SPSS. Results: Seven hundred and thirty‐four papers have been published by Iranian between 2002 and 2008. Findings showed a growing trend of neuroscience papers in the last 3 years with most papers (264) classified in the neuropharmacology subfield. There were fewer papers in neurohistory, psychopharmacology and artificial intelligence. International contributions of authors were mostly in the neurology subfield, and ‘Collaboration Coefficient’ for the neuroscience subfields in Iran was 0.686 which is acceptable. Most international collaboration between Iranians and developed countries was from USA. Eighty‐seven percent of the published papers were in journals with the impact factor between 0 and 4; 25% of papers were published by the researchers affiliated to Tehran University of Medical Sciences. Conclusion: Progress of neuroscience in Iran is mostly seen in the neuropharmacology and the neurology subfields. Other subfields should also be considered as a research priority by health policymakers. As this study was carried out by the collaboration of librarians and neuroscientists, it has been proved valuable for both librarians and policymakers. This study may be encouraging for librarians from other developing countries.  相似文献   

Level of Students＇ Achievement in Mathematics at the End of Elementary Education in Yemen     

Tarig Mohamed  Ali Mohamed  Khair Ahmad  Zamri Khairani  Tahra Aisa  Elrofai 《美中教育评论》2012,(6):588-593

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The relationship of organizational corruption with organizational culture, attitude towards work and work ethics: a search on Turkish high school teachers     

Ali Balc?  Murat ?zdemir  ?i?dem Apayd?n  Fatmanur ?zen 《Asia Pacific Education Review》2012,13(1):137-146

The aim of this study is to analyse organizational corruption and to determine its level of relation to attitude towards work, work ethics and organizational culture. The data in study have been collected from 441 public high school teachers employed in the central districts of Ankara in the school year of 2008–2009. Data have been collected through ‘Scale for Organizational Corruption’, ‘Scale for Attitude towards Work’, ‘Scale for Work Ethics’ and ‘Scale for Organizational Culture’, all of which were developed by the researchers in this study. Correlation and regression analysis techniques have been used in analysing the data. It is concluded from the study that there is a significant, though at an average level, relation between organizational corruption, organizational culture and work ethics and that there is a negative significant relation, though at a low level, between organizational corruption and attitude towards work. It is also concluded that the variables for attitude towards work, work ethics and organizational culture explain 38% of the variation in organizational corruption.  相似文献   

An improved technique for global daily sunshine duration estimation using satellite imagery     

Muhammad Ali Shamim  Renji Remesan  Da-wei Han  Naeem Ejaz  Ayub Elahi 《浙江大学学报(A卷英文版)》2012,13(9):717-722

This paper presents an improved model for global sunshine duration estimation. The methodology incorporates geostationary satellite images by including snow cover information, sun and satellite angles and a trend correction factor for seasons, for the determination of cloud cover index. The effectiveness of the proposed methodology has been tested using Meteosat geostationary satellite images in the visible band with a temporal resolution of 1 h and spatial resolution of 2.5 km×2.5 km, for the Brue Catchment in the southwest of England. Validation results show a significant improvement in the estimation of global sunshine duration by the proposed method as compared to its predecessor (R ² is improved from 0.68 to 0.83, root mean squared error (RMSE) from 2.37 h/d to 1.19 h/d and the mean biased error (MBE) from 0.21 h/d to 0.08 h/d). Further studies are needed to test this method in other parts of the world with different climate and geographical conditions.  相似文献   

Te Wero—the challenge: reimagining universities from an indigenous world view     

Edwina Pio  Kitea Tipuna  Ali Rasheed  Lorraine Parker 《Higher Education》2014,67(5):675-690

This paper provides a foundational framework to bring into conversation indigenous world views in reimagining universities. Highlighting a specific indigenous world view, the university is presented as a site for critical conversation and transformative praxis. We discuss the workplace experiences of indigenous staff in a university and infer from these how management practices related to indigenous staff could be enhanced. Building on our study of Māori academic and administrative staff in a New Zealand university, an indigenous typology and a Wero or challenge matrix is offered, which locates different positions and actions that universities adhere to or seek to emulate. The paper argues for universities to reimagine their policies and practices by drawing from the complex richness of indigenous world views.  相似文献   

Academics transformational leadership: an investigation of heads of department leadership behaviours in Malaysian public universities     

Lokman Tahir  Tina Abdullah  Fadzli Ali  Khadijah Daud 《Educational studies》2014,40(5):473-495

Presently, the role and the function of universities in Malaysia have been described as being in a state of change. Several strategies have been adopted to assist in the re-branding of higher institutions of learning. As a consequence, an effective model of leadership practices, particularly at the Malaysian academic departmental level, has to be generated in order to replace the traditional leadership practices in meeting the national aspirations. The purpose of this study was to investigate the relationship between department heads’ leadership behaviour with academics’ organisational commitment. Survey responses from 430 academics from Malaysian public universities were received and analysed. The main finding of this study reveals that the adoption of encouraging leadership behaviour (Kouzes and Posner’s Transformational Leadership) shows a 55% direct positive relationship with academics’ organisational commitment, with demographical factors playing no role as a moderator with either variable. This reinforces the rationalisation for adopting the model within the Malaysian academic setting, where department heads should indeed lead the academic organisation.  相似文献   

儿童气质的发展认知神经科学研究进展及其启示     

原阿丽  卢英俊 《幼儿教育》2014,(Z3):44-48

气质是个体出生之后就具有的一种明显而稳定的人格特征,对儿童未来的社会化、个性化发展具有重要影响。应用神经解剖、电生理、脑成像、神经生化与基因分析等技术,儿童气质的生物学基础研究日新月异。除了生物学因素外,非生物学因素,如早期生活经验对儿童气质发展的影响,也日益引起研究者的关注。养育者与教育者应理解并尊重不同气质类型的儿童,根据儿童不同的气质类型,为他们提供适宜的教育,把握儿童气质发展的关键期,整合基因、脑、个体经验及社会文化等因素,用关爱促进儿童气质的良性发展,同时重视艺术教育对儿童气质发展的调节作用。  相似文献