Construction of some hypergroups from combinatorial structures     

Ali?Reza?AshrafiEmail author  Ahmad?Reza?Eslami-Harandi 《浙江大学学报(A卷英文版)》2003,4(1):76-79

Jajcay's studies(1993; 1994) on the automorphism groups of Cayley maps yielded a new product of groups, which he called, rotary product. Using this product, we define a hyperoperation ⊙ on the groupSym _e(G), the stabilizer of the identitye∈G in the groupSym(G). We prove that (Sym _e (G), ⊙) is a hypergroup and characterize the subhypergroups of this hypergroup. Finally, we show that the set of all subhypergroups ofSym _e (G) constitute a lattice under ordinary join and meet and that the minimal elements of order two of this lattice is a subgroup ofAut (G).  相似文献   

Shared teaching culture in different forms: a comparison of expert and novice teachers’ practices     

Mohammad Reza Sarkar Arani 《Educational Research for Policy and Practice》2017,16(3):235-255

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Construction of some hypergroups from combinatorial structures     

Ali Reza Ashrafi  Ahmad RezaEslami-Harandi 《Journal of Zhejiang University. Science. B》2003,(1)

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Authenticity in teaching and teachers’ emotions: a hermeneutic phenomenological study of the classroom reality     

Akram Ramezanzadeh  Seyyed Mohammad Reza Adel  Gholamreza Zareian 《Teaching in Higher Education》2016,21(7):807-824

This study probed the conceptualization of authenticity in teaching and its link to teachers’ emotional life through critical emotional praxis because emotions are integral to discovering who we really are (McCarthy, E. D. 2009. “Emotional Performances as Dramas of Authenticity.” In Authenticity in Culture, Self, and Society, edited by P. Vannini, and J. P. Williams, 241–255. London: Ashgate). The participants were 20 Iranian university teachers. Data were collected using interviews, field notes, and observation and were analyzed through the lens of hermeneutic phenomenology. The results revealed that authenticity in teaching consisted of themes of being one’s own self, horizon of significance, and contestation resulted from the sense of responsibility, authentic relations, and de-constructive thinking which confirmed the dialogical nature of authenticity. The emotions connected to authenticity in teaching were Transition-Anger, love, and caring indicating that authenticity in teaching was a practice toward socially just teaching.  相似文献   

Students’ interest towards STEM: a longitudinal study     

Edy Hafizan Mohd Shahali  Mohamad Sattar Rasul  Kamisah Osman  Nurazidawati Mohamad Arsad 《Research in Science & Technological Education》2019,37(1):71-89

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Some Properties of Matrices with 1, -1 and 0 Entries     

Reza Hashemian 《Journal of The Franklin Institute》1973,295(5):383-394

A class of matrices with 1, -1 and 0 entries, called the H-matrices, is introduced and properties of such matrices are investigated. It is shown that for an H-matrix K the matrix G = KDK^T, where D is a diagonal matrix with nonnegative diagonal entries, has certain properties applicable to topological synthesis of networks. A technique for decomposing a particular symmetrical matrix G, called the Q-matrix, into KDK^T, where K is an H-matrix and D is a diagonal matrix with positive diagonal entries, is also developed.  相似文献   

Schwarz's Lemma for n-Ports     

F.M. Reza 《Journal of The Franklin Institute》1984,317(2):57-71

The scalar versions of Schwarz's Lemma have been extensively employed in the classical development of the synthesis of lumped RLC driving-point impedance function. A vector space generalization of Schwarz's Lemma, particularly suitable for application to linear passive n-port impedance functions, is derived in this paper. The concept of power dominant networks is introduced and a number of power inequalities derived.  相似文献   

Pedagogical knowledge base underlying EFL teachers’ provision of oral corrective feedback in grammar instruction     

Mahmood Reza Atai  Zahra Shafiee 《Teacher Development》2017,21(4):580-596

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Optimal trajectory tracking solution: Fractional order viewpoint     

Abolhassan Razminia  Mehdi Asadizadehshiraz  Hamid Reza Shaker 《Journal of The Franklin Institute》2019,356(3):1590-1603

In this paper, a generalized trajectory tracking problem for a closed-loop control system is formulated in the optimal control context. A linear time varying plant is considered to track a closed-loop desired trajectory generated by a given mechanism. The theoretical results are obtained based on the Hamilton-Jacobi-Bellman theory in which some generalized semiquadratic value functions are employed as the Lagrangian. In addition, we employ a non-integer order integral of Riemann-Liouville type as the cost functional, so that the trajectory tracking process can be evaluated in an extended optimum manner wherein the fractionality plays the main role. By selecting a suitable fractional order of the integral, a satisfactory optimal control system can be deduced in which least concentration on selecting the weighting matrices is needed. To show the effectiveness of the results, some numerical examples illustrate the potentials.  相似文献   

An examination of constructivist educational technologies: Key affordances and conditions     

Reza Feyzi Behnagh  Sepideh Yasrebi 《British journal of educational technology : journal of the Council for Educational Technology》2020,51(6):1907-1919

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