Self-regulated learning and satisfaction: A key determinants of MOOC success     

Albelbisi  Nour Awni  Al-Adwan  Ahmad Samed  Habibi  Akhmad 《Education and Information Technologies》2021,26(3):3459-3481

Education and Information Technologies - MOOC is an innovative method in modern education, particularly important for sharing of excellent educational resources worldwide. To realize the full...  相似文献   

Design of 2-D stable analog and recursive digital filters using properties of the derivative of even or odd Parts of Hurwitz polynomials     

V. Ramachandran  M. Ahmadi 《Journal of The Franklin Institute》1983,315(4):259-267

In this paper, a method for the design of 2-D analog and recursive digital filters is presented. Starting from a structure in the analog domain, suitable even or odd parts of two-variable Hurwitz polynomials are generated. This enables 2-variable very strictly Hurwitz polynomials (VSHP) to be obtained,² thus avoiding non-essential singularities of the second kind. Thus it will ensure a stable 2-D recursive digital filter obtained by the use of bilinear transformations. Examples are given to illustrate the method.  相似文献   

Cord Blood Insulin Levels: It’s Correlation with Gender,Birth Weight and Placental Weight in Term Newborns     

Afzal Ahmad  Rukmini Mysore Srikantiah  Charu Yadav  Ashish Agarwal  Poornima Ajay Manjrekar  Anupama Hegde 《Indian journal of clinical biochemistry : IJCB》2016,31(4):458-462

The cause of more insulin resistance in female than males are still unknown. To know the cause from early life, normal values of relevant parameters are required. So, aim of this study was to determine the reference levels of glucose and insulin in cord blood of term newborns and to examine their effects on gender, placental and birth weight of term newborns. In cross sectional study 60 consecutive term newborns were included from constituent hospitals. Placental and birth weights were measured and cord blood was collected for estimation of serum insulin and plasma glucose. Plasma glucose estimation was done by auto analyzer (GOD–POD method) and serum insulin analysis was done using Insulin ELISA Kit. After analysis, mean ± 2SD used for estimating cord blood insulin and glucose levels, which were 10.1 ± 7.8 μIU/mL and 67.8 ± 33.8 mg/dL respectively. Correlation of insulin with both birth weight and placental weight were r = 0.359 and 0.41 respectively; p < 0.001. Interestingly we found higher insulin levels in females as compared to male newborns in spite of having lower birth weight in them. In conclusion this study reported the levels of insulin and glucose in cord blood of term newborns. Incidentally, this is the first study as per our knowledge to report significant correlation between cord blood insulin, glucose with birth weight, placental weight and gender in south India. Female newborns had higher insulin levels than males, despite lesser birth weight can be attributed to intrinsic insulin resistance in them.  相似文献   

Finite element simulation of stress intensity factors in elastic-plastic crack growth     

ALSHOAIBI Abdulnaser M. ARIFFIN Ahmad Kamal 《浙江大学学报(A卷英文版)》2006,7(8):1336-1342

INTRODUCTION The finite element method (FEM) has been widely employed for solving linear elastic and elas-tic-plastic fracture problems. The evaluation of stress intensity factors in 2D geometries by FEM is a tech-nique widely used for non-standard crack configura-tions. Basically, there are two groups of estimation methods, those based on field extrapolation near the crack tip (Chan et al., 1970; Shih et al., 1976) and those using the energy release when the crack propagates. However…  相似文献   

Developing a mathematics curriculum to improve learning behaviors and mathematics competency of children     

Nahid Shirani Bidabadi  Ebrahim Mirshah Jafari  Ahmad Abedi 《The Journal of educational research》2019,112(3):421-428

The authors investigated the effect of a mathematical curriculum (CU) developed based on verbal and practical activities on the mathematical competency (MC) and learning behaviors (LB) of preschool children. In a quasi-experimental design, 60 children (5- to 6-year-old girls) were selected using the accessible sampling method. The children were randomly divided into an experimental group and a control group, and the relevant concepts were taught to the children in both groups. While the control group received the typical kindergarten education based on the usual textbooks and worksheets, the CU was taught to the experimental group. Structural equation modeling was used to model the data and statistical evaluation. The results demonstrated a significant difference between the two groups in MC and LB. The CU significantly improved MC directly, and indirectly through the improvement of LB (i.e., engagement and learning focus, verbal behaviors, and type of activity).  相似文献   

Teachers’ perceptions of the benefits and the challenges of integrating educational robots into primary/elementary curricula     

Ahmad Khanlari 《European Journal of Engineering Education》2016,41(3):320-330

Twenty-first century education systems should create an environment wherein students encounter critical learning components (such as problem-solving, teamwork, and communication skills) and embrace lifelong learning. A review of literature demonstrates that new technologies, in general, and robotics, in particular, are well suited for this aim. This study aims to contribute to the literature by studying teachers' perceptions of the effects of using robotics on students' lifelong learning skills. This study also seeks to better understand teachers' perceptions of the barriers of using robotics and the support they need. Eleven primary/elementary teachers from Newfoundland and Labrador English Schools District participated in this study. The results of this study revealed that robotics is perceived by teachers to have positive effects on students' lifelong learning skills. Furthermore, the participants indicated a number of barriers to integrate robotics into their teaching activities and expressed the support they need.  相似文献   

Effects of a social tutor on participation,sense of community and learning in online university courses     

Stefano Cacciamani  Donatella Cesareni  Vittore Perrucci  Giulia Balboni  Ahmad Khanlari 《British journal of educational technology : journal of the Council for Educational Technology》2019,50(4):1771-1784

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Assessing industry's needs: Business requirements versus classroom preparations     

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

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Resource discovery in distributed digital libraries through visual knowledge navigation     

GU Qian-yi AHMAD Faisal SUMNER Tamara 《浙江大学学报(A卷英文版)》2005,6(11):1306-1311

INTRODUCTION In this paper, we present our work in the Strand Map Service (SMS), which provides concept map based browsing interfaces for resource discovery in a library independent manner within American Na- tional Science Digital Library (NSDL). As critical components of digital libraries, dis- covery systems provide interfaces that support user to search and browse for resources in digital libraries (Hall et al., 1999). The effectiveness of discovery systems has big impact on the…  相似文献   

Generalized filtering of one-sided Lipschitz nonlinear systems under measurement delays     

Sohaira Ahmad  Muhammad Rehan 《Journal of The Franklin Institute》2017,354(13):5589-5616

This paper addresses the filtering problem for the one-sided Lipschitz nonlinear systems under measurement delays and disturbances using a generalized observer. A generalized architecture for filtering of the one-sided Lipschitz nonlinear systems with output delays is explored, which exhibits diverging manifolds, namely, the conventional static-gain filter and the dynamical filter, and can be employed to render robust stability of the filtering error dynamics. A matrix inequality based framework is obtained by employing a Lyapunov?Krasovskii (LK) functional, whose derivative is exploited through Jensen's inequality, one-sided Lipschitz condition, quadratic inner-boundedness inequality and range of the measurement delay, resulting into L₂ stability for the filtering error system. Generalized filter design for the Lipschitz nonlinear systems with delayed outputs and specific results for the delay-dependent and delay-rate-independent filtering schemes for the one-sided Lipschitz nonlinear systems are deduced from the proposed approach. Convex optimization techniques are employed to achieve a solution for the nonlinear constraints through linear matrix inequalities by employing cone complementary linearization approach. Illustrative numerical examples to demonstrate the effectiveness of proposed method are provided.  相似文献