A system operator theorem on positive real operators     

F.M. Reza 《Journal of The Franklin Institute》1983,316(3):279-290

A new theorem expands the domain of the scalar immittance functions Z(p) to the operator Z(T) where T(s) is an invertible linear passive n-port system. Elements R, L, C of Z(p) are replaced by operators RI, LT, and [CT] ^{- 1}. All frequency transformations may be considered contained in this theorem when T is a scalar.  相似文献   

Different effects of L-arginine on morphine tolerance in sham and ovariectomized female mice     

Karami R  Hosseini M  Khodabandehloo F  Khatami L  Taiarani Z 《Journal of Zhejiang University. Science. B》2011,12(12):1016-1023

Objective  

The roles of gonadal hormones and nitric oxide (NO) on the analgesic effects of morphine, tolerance to morphine, and their interactions have been widely investigated. In the present study, the effect of l-arginine (an NO precursor) on morphine tolerance in sham and ovariectomized (OVX) female mice was investigated.  相似文献   

Performance of passive and reactive profiled median barriers in traffic noise reduction     

Mohammad Reza Monazzam  Samaneh Momen Bellah Fard 《浙江大学学报(A卷英文版)》2011,12(1):78-86

Median noise barriers, like parallel noise barriers, can be employed to reduce the impact of traffic on roadside communities via the direct propagation path. The performance of different shapes of median barriers was compared using reactive and passive surfaces and a 2D boundary element method (BEM). In the case of reactive surfaces, quadratic residue diffusers (QRDs) and primitive root diffusers (PRDs) were used on the top and stem surfaces of median barriers. To introduce passive barriers, two different absorbent materials including fibrous material and a grass surface with flow resistivity of 20 000 and 2500 kg/(s·m²), respectively, were similarly applied. The effect of thin absorptive barriers was similar at lower frequencies and better at mid and high frequencies to that of their equivalent rigid barriers. More improvement was achieved by covering the top surface of thick barriers with grass rather than with fibrous material. The performance of QRD and PRD barriers where the diffuser was located on the top surface was more frequency dependent than that of barriers coated with fibrous material. A comparison of the average A-weighted insertion loss in the thick barriers showed that the greatest improvement (2.59 dB (A)) was achieved using a barrier of 30-cm thickness covered with grass.  相似文献   

The effect of student teaching experience on preservice elementary teachers’ self-efficacy beliefs for technology integration in the UAE   总被引：1，自引：0，他引：1  

Hamed Mubarak Al-Awidi  Iman Mohammad Alghazo 《Educational technology research and development : ETR & D》2012,60(5):923-941

This study examines the effect of the student teaching experience on preservice elementary teachers?? self-efficacy beliefs and the sources of their beliefs about technology integration in teaching in the UAE. The participants were 62 pre-service elementary teachers at the United Arab Emirates University. Pre- and post-survey was administered to examine participants?? self-efficacy beliefs for technology integration prior to and at the end of the teaching experience. Additionally, a purposeful subset of the sample (n?=?16) were interviewed based on their high self-efficacy belies to explore the sources of the high self-efficacy beliefs. Results showed a significant effect of student teaching experiences on participants?? judgment of their self-efficacy about technology integration. Mastery experience and vicarious experience reported to be the most influential sources of self-efficacy to integrate technology among preservice elementary teachers.  相似文献   

How Iranian People Engage Sport and Physical Education Regarding Managerial Changes From the Beginning of Achaemenian Dynasty to End of Pahlavi Kingdom     

Ali  Afsari    Reza Sattar 《美中教育评论》2012,(7):676-683

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Medical education and COVID-19 pandemic: a crisis management model towards an evolutionary pathway     

Karimian  Zahra  Farrokhi  Majid Reza  Moghadami  Mohsen  Zarifsanaiey  Nahid  Mehrabi  Manoosh  Khojasteh  Laleh  Salehi  Nasim 《Education and Information Technologies》2022,27(3):3299-3320

Education and Information Technologies - The COVID-19 crisis has had a profound effect on higher education, especially medical education due to its sensitive nature, dealing with people’s...  相似文献   

The changing academic environment and diversity in students' study philosophy,beliefs and attitudes in higher education     

Mohammad Alauddin  Adrian Ashman 《高等教育研究与发展》2014,33(5):857-870

Student populations in higher education in Australia and elsewhere in the developed world have experienced significant diversity over the past two decades. The existing literature has provided limited clarity about the effects of this diversity on the dimensions underpinning students' study philosophy domain. Based on a large data set from a leading Australian university, this paper analyses students' study philosophy, beliefs and attitudes towards teaching and learning. Factor analysis explored themes (or dimensions) within the survey. Multivariate analysis of variance used these dimensions as dependent variables with age, sex, ethnicity, study discipline, study level, academic performance and sex/ethnicity interaction as grouping variables to identify significant sources of variations. Deep learning, expediency and responsibility reflected the students' study philosophy domain. Deep learning and responsibility varied with ethnicity and academic performance. Expediency differed according to ethnicity, study discipline and academic performance. Students in business-related disciplines displayed greater expediency than peers elsewhere, treating education like any other commodity. The contribution of this study lies in its rigorous analysis of the impact of the diversity of the student population on the study philosophy domain, compared to the existing literature.  相似文献   

Conceptions of assessment and teacher burnout     

Reza Pishghadam  Bob Adamson  Shaghayegh Shayesteh Sadafian  Flora L. F. Kan 《Assessment in Education: Principles, Policy & Practice》2014,21(1):34-51

Teacher burnout is an important phenomenon that affects the education system and society as a whole. Assessment represents a form of stress for teachers, and this study explores the association between teachers’ assessment-related beliefs and their burnout level. To this end, the Teachers’ Conceptions of Assessment (TCoA) inventory along with the Maslach Burnout Inventory were administered to a sample of Iranian teachers of English language. Multiple correspondence analysis and multiple regression analysis were employed for data analysis. The results reveal a significant relationship between TCoA and the three dimensions of burnout (emotional exhaustion, depersonalisation and reduced personal accomplishment). It is similarly found that conceiving of assessment as irrelevant to the life and work of teachers and learners is the best predictor of Depersonalisation and Personal Accomplishment, whereas Student Accountability is the best predictor of Emotional Exhaustion. Finally, the results are discussed and implications are provided in the context of education.  相似文献   

E-learning services acceptance in higher educational institutes: A case study in Brunei     

Aqilah Nawwarah H.A. Rajak  Dk. Nurul Najiah Pg Abu Bakar  Nur Dina Azyyati Lajim  Nurul Hikmatull Su’aidah Haji Kamarulzaman  Siti Nur Fakhrinah Haji Karim  Mohammad Nabil Almunawar 《Education and Information Technologies》2018,23(6):2341-2361

This research studies on the e-learning services acceptance in higher education institutions in Brunei Darussalam. This research has seven hypotheses, relating to independent, intermediary, and dependent variables. The independent variables include lecturer’s characteristics, design of learning contents, teaching materials, and playfulness; while the intermediary variables are perceived benefits and perceived ease of use. On the other hand, the dependent variable in this research is the intention to use e-learning. Multiple regression analysis were conducted to test the hypotheses proposed. Data analysis from this research has confirmed that the lecturer’s characteristics, teaching materials, perceived ease of use and the intention to use e-learning corresponds to the perceived benefits. Meanwhile, the design of learning content and the intention to use e-learning are positively related to the perceived ease of use and lastly, the variable playfulness is positively related to the intention to use e-learning.  相似文献   

The moderating effect of experience on the intention to adopt mobile social network sites for pedagogical purposes: An extension of the technology acceptance model     

Lam Wai Leong  Othman Ibrahim  Mohammad Dalvi-Esfahani  Hamed Shahbazi  Mehrbakhsh Nilashi 《Education and Information Technologies》2018,23(6):2477-2498

With numerous benefits of utilising mobile social network sites (SNSs) for learning purposes, limited studies have been conducted to determine the factors that influence the adoption of mobile SNSs in facilitating learning. Accordingly, the main purpose of this study is to explore the determinants of students’ behavioural intention to use mobile SNSs for their pedagogical purposes by utilising an extended version of Technology Acceptance Model. Furthermore, the moderating effect of users’ experience on their behavioural intention was investigated. Using a structured questionnaire, data were collected from 600 students from top-five public universities of Malaysia. The results revealed perceived task-technology fit as the great predictor of users’ intention and perceived usefulness. Although the moderating impact of students’ experience on the model found to be positive, it was not supported in this study. The contributions of this study both to the literature and practice are discussed.  相似文献