Weighing designs to detect a single counterfeit coin     

Jyotirmoy Sarkar  Bikas K. Sinha 《Resonance》2016,21(2):125-150

In this article, we discuss at length a combinatorial problem which has been of historic interest. It has appeared as a puzzle in several different versions with varying degrees of difficulty. It can be simply stated as follows: We are given a number of coins which are otherwise identical except that there may be at most one fake coin among them which is either slightly heavier or slightly lighter than the other genuine coins. Using only a two-pan weighing balance, we must devise a weighing scheme to identify the counterfeit coin and determine whether it is heavier or lighter (or declare that all coins are normal). We construct both sequential and non-sequential (that is, simultaneously declared) weighing plans for any given number of coins containing at most one fake coin using the minimum number of weighings needed.  相似文献   

Physicochemical characteristics of various milk samples available in Pakistan     

Imran M  Khan H  Hassan SS  Khan R 《Journal of Zhejiang University. Science. B》2008,9(7):546-551

We report physicochemical characteristics of various kinds of liquid milk commercially available in Pakistan in comparison with those of fresh natural milk from animals. Milk samples were collected from local markets at Peshawar, Pakistan,and analyzed for their physical features, including moisture, total solids, specific gravity, conductivity, viscosity and titratable acidity (lactic acid equivalent), and chemical components and macro-minerals, including total protein, casein, lactose, ash and minerals (Na, K and Mg). These items were compared with the physicochemical characteristics of the fresh natural milk samples from buffalo, cow and goat. The results were also compared with reported nutritional quality of milk from various countries and World Health Organization (WHO) standards. We found that all the physical features and chemical components of commercially available milk in Pakistan markets meet WHO's requirements, except for Na, K, Ca and Mg, which are below the standards.  相似文献   

Guidance as a means for enhancing the functional operations of the Elective System at Kuwait University     

Mohammad Jawad Ridha 《International journal for the advancement of counseling》1982,5(3):207-214

In 1975/76 Kuwait University was transferred to an Elective System and initially, the article reviews the rationale and objectives of such a change. Guidance or advisement is considered a key means to achieve these objectives. The major focus of the article is an examination of several attempts to assess/evaluate the implementation and effectiveness of advisement. Recommendations for practical solutions to those problems which surround this practice are also discussed.Paper submitted to the International Consultation Conference on Career Guidance in Higher Education convened by IRTAC and Robinson College — Cambridge University, 13–17 December 1981, Robinson College, Cambridge, England.  相似文献   

The benefits of educational technology. Roshd,magazine of educational technology,by mohammad reza afzalnia. 1988, vol. 4, no. 2, pp. 772–774     

M. Reza Afzalnia 《Educational technology research and development : ETR & D》1990,38(3):93-94

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Using Computer Assisted Instruction to Compare the Inventive Model and the Radical Constructivist Approach to Teaching Physics     

Rezaei  Ali Reza  Katz  Larry 《Journal of Science Education and Technology》2002,11(4):367-380

This paper introduces a new way of evaluating instructional strategies by using computers. Two basic theories, instructivism and constructivism, are discussed and critically evaluated in terms of their effectiveness in conceptual learning. Despite the current popularity of constructivism, the radical form of it is criticized in this paper. The advantages and limitations of these two approaches, especially the radical forms of constructivism, are outlined. After borrowing some ideas from other effective conceptual change models, an integrative model for conceptual learning (the Inventive Model) is introduced. Two versions of multimedia physics software are developed by the authors. The first version is based on the Inventive Model and the second version based on a radical constructivist model. The effectiveness of the Inventive Model was compared with the radical constructivist approach and conventional science instruction. Students' log files were analyzed to investigate the nature and the processes of the conceptual change. A conceptual test and a knowledge test were used to compare the groups. The quantitative results showed the superiority of the Inventive Model over the other models in conceptual learning and the superiority of conventional instruction in learning the basic knowledge. The qualitative analysis showed that only the Inventive Model lead to coherent conceptual learning. It was concluded that the process of conceptual change is gradual and continuous. Analysis of students' log files revealed no moments of dramatic change in students' conceptions.  相似文献   

The art of self-making: identity and citizenship education in late-modernity     

Reza Gholami 《British Journal of Sociology of Education》2017,38(6):798-811

Taking the English National Curriculum as its main example, this article argues that an overly nationalistic, normative and ‘fact-based’ citizenship education curriculum is failing to engage the dimensions of young people’s identities which they experience as deeply meaningful. There is thus a chasm – albeit a false one – between official discourses and pedagogies of citizenship and what young people consider to be their ‘real’ selves. I argue that citizenship education must develop a more sophisticated understanding of the complexities of how identities are formed and performed, especially in light of globalisation and increasing migration. I also make a somewhat unorthodox argument for conceptualising ‘relating-to-otherness’ in the same way that we think of music consumption. This has implications for how we experience, interpret, value and create ‘others’. The article also makes some recommendations for how these ideas can begin to be implemented in educational settings.  相似文献   

Assessing industry's needs: Business requirements versus classroom preparations     

Reza T. Ahmadi 《Assessment Update》1996,8(2):6-7

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Application of Quality Function Deployment for the Improvement of Quality in an Engineering Department     

Mohammad S. Owlia  Elaine M. Aspinwall 《European Journal of Engineering Education》1998,23(1):105-115

In adopting a customer‐oriented approach to higher education, quality function deployment (QFD) is one of the total quality management techniques which can be applied for process and design improvement. Following a review of some practices in this sector, this paper outlines a QFD model in which the opinions of three groups of customers are utilized for quality planning. A developed framework for the dimensions of quality in engineering education was used in conjunction with the quality processes in a departmental quality management framework proposed by the Engineering Professors’ Council. The results from the QFD led to a strategy for prioritizing the different quality processes within a school/department.  相似文献   

TS fuzzy robust L1 control for nonlinear systems with persistent bounded disturbances     

Navid Vafamand  Mohammad Hassan Asemani  Alireza Khayatian 《Journal of The Franklin Institute》2017,354(14):5854-5876

In this paper, a novel technique for Takagi–Sugeno (TS) model-based robust L₁ controller design of nonlinear systems is proposed. Two synthesis methods based on quadratic and non-quadratic Lyapunov functions are considered. To design the robust stabilizing controller, a new approach for deriving sufficient conditions associated with the L₁ performance criterion in terms of strict linear matrix inequality is proposed. This novel technique results in less pre-chosen scalar design variables and calculation burden. Furthermore, deriving the controller synthesis conditions via a non-quadratic Lyapunov function (NQLF) relaxes the obtained conditions. Therefore, the proposed approaches not only efficiently minimize the effect of persistent bounded disturbance, but also are applicable for wider classes of TS systems. Furthermore, some new lemmas are proposed to facilitate strict LMI formulation and to provide more degrees of freedom. Finally, several numerical and practical examples are presented to show the merits of this paper.  相似文献   

Internationalization of higher education： Challenges, strategies, policies and programs   总被引：1，自引：0，他引：1  

Akbar Zolfaghari Mohammad Shatar Sabran Ali Zolfaghari 《美中教育评论》2009,6(5):1-8,20

In today＇s changing world, the idea of internationalization of higher education especially in developing countries has been deduced from globalization of education process. The international aspect of higher education is becoming increasingly important, composite, and confusing. The higher education has an effect on the society through policy-making, funding, and planning. The purpose of this paper is to analyze the meaning, definition, importance, necessity, and pre-requisites of internationalization of higher education. This paper also studies the programs and strategies of internationalization of higher education. Key challenges for the future direction of internationalization are identified in this paper.  相似文献