Social anxiety in E-Learning: Scale validation and socio-demographic correlation study     

Alsudais  Ali S  Alghamdi  Abdullah S  Alharbi  Abdullrhman A  Alshehri  Atif A  Alzhrani  Mustafa A  Keskin  Sinan  Şahin  Muhittin  Althubaiti  Alaa M 《Education and Information Technologies》2022,27(6):8189-8201

Education and Information Technologies - During the ongoing coronavirus disease 2019 pandemic, over 1.5 billion students worldwide have been deprived of access to traditional learning....  相似文献   

Digital Divide and Caste in Rural Pakistan     

Ahsan Abdullah 《The Information Society》2013,29(4):346-356

This study examined how caste influences adoption of information and communication technologies. It entailed a survey of 2750 farmers, who were interviewed in person, in rural Punjab (Pakistan), and two different methods for data analysis—data mining and indices-based statistical analysis. The analysis shows digital divides at the caste level. Furthermore, it shows that old and new technologies diffuse differently among castes.  相似文献   

An investigation into the influence of outdoor environmental education courses on the environmental attitude and behaviours of Malaysian participants: a life history approach     

Sharifah Intan Sharina Syed Abdullah 《Environmental Education Research》2020,26(6):915-916

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Functional observer based controller for stabilizing Takagi–Sugeno fuzzy systems with time-delays     

Syed Imranul Islam  Cheng-Chew Lim  Peng Shi 《Journal of The Franklin Institute》2018,355(8):3619-3640

This paper investigates the construction of a fuzzy functional observer for nonlinear systems with time-delays, and the application of the observer to estimate the state functions of the parallel distributed compensation controller for stabilizing the system. Two types of time-delays are considered: constant and time-varying delays with bounded time derivative. Stability conditions are obtained using Lyapunov–Krasovskii functional approach; and the conditions are transformed into linear matrix inequalities with equality constraints so that observer parameters can be calculated using the solution of these inequalities. Functional observer construction procedures are presented considering both constant and time-varying time-delays. Two examples, including one for obtaining a power system stabilizer for a single machine infinite bus system, are presented to illustrate effectiveness of the proposed design procedures.  相似文献   

Interaction between prey and mutually interfering predator in prey reserve habitat: Pattern formation and the Turing–Hopf bifurcation     

Jai Prakash Tripathi  Syed Abbas  Gui-Quan Sun  Debaldev Jana  Cui-Hua Wang 《Journal of The Franklin Institute》2018,355(15):7466-7489

In this paper, we propose a diffusive prey-predator system with mutually interfering predator (Crowley–Martin functional response) and prey reserve. In particular, we develop and analyze both spatially homogeneous model based on ordinary differential equations and reaction-diffusion model. We mainly investigate the global existence and boundedness of positive solution, stability properties of homogeneous steady state, non-existence of non-constant positive steady state, conditions for Turing instability and Hopf bifurcation of the diffusive system analytically. Conventional stability properties of the non-spatial counterpart of the system are also studied. The analysis ensures that the prey reserve leaves stabilizing effect on the stability of temporal system. The prey reserve and diffusive parameters leave parallel impact on the stability of the spatio-temporal system. Furthermore, we illustrate the spatial patterns via numerical simulations, which show that the model dynamics exhibits diffusion controlled pattern formation by different interesting patterns.  相似文献   

Expert Systems used in the identification of misconceptions and assessment in school science: a review and proposed development     

Wan Salihin Wong Abdullah  Phil Wild 《British journal of educational technology : journal of the Council for Educational Technology》1994,25(1):29-40

From research carried out over the last 20 years, there is now a wealth of data on the identification of students' misconceptions in various topics within science education. Much of the data in the form of questions and students' answers, and analysis of the data is well documented. Within this same period there have been major developments in the programming and use of microcomputer based expert system shells which can use formalised expert knowledge to mimic the processes normally carried out by a human expert. It seems that the two areas of research could, in the fuure, be brought together to provide support for teachers in using the research findings to support the individualised and targeted teaching of students in the classroom. A recent literature search, however, has shown the dearth of activity in this field. This paper reviews the situation at the present time and suggests how the two activities could be united.  相似文献   

A global questionnaire survey of the scholarly communication attitudes and behaviours of early career researchers     

David Nicholas  Hamid R. Jamali  Eti Herman  Anthony Watkinson  Abdullah Abrizah  Blanca Rodríguez‐Bravo  Cherifa Boukacem‐Zeghmouri  Jie Xu  Marzena wigo&#x;  Tatiana Polezhaeva 《Learned Publishing》2020,33(3):198-211

This article describes an international study informed by a 3‐year‐long qualitative longitudinal project, which sought to discover the scholarly communication attitudes and behaviour of early career researchers (ECRs). Using a combination of small‐scale interviews and a larger‐scale survey, ECRs were questioned on their searching and reading behaviour, publishing practices, open data, and their use of social media. Questionnaire invitations were sent out via publisher lists, social media networks, university research networks, and specialist ECR membership organizations. One‐thousand and six‐hundred responses were received, with many coming from China, Russia, and Poland. Results showed that ECRs are adopting millennial‐facing tools/platforms, with Google, Google Scholar, social media, and smartphones becoming embedded in their scholarly activities. Open data sharing obtains widespread support but somewhat less practice. There are some differences in attitudes and behaviour according to age and subject specialism.  相似文献   

Adjuvant effects of saponins on animal immune responses   总被引：2，自引：0，他引：2  

Rajput ZI  Hu SH  Xiao CW  Arijo AG 《Journal of Zhejiang University. Science. B》2007,8(3):153-161

Vaccines require optimal adjuvants including immunopotentiator and delivery systems to offer long term protection from infectious diseases in animals and man. Initially it was believed that adjuvants are responsible for promoting strong and sustainable antibody responses. Now it has been shown that adjuvants influence the isotype and avidity of antibody and also affect the properties of cell-mediated immunity. Mostly oil emulsions, lipopolysaccharides, polymers, saponins, liposomes, cytokines, ISCOMs (immunostimulating complexes), Freund’s complete adjuvant, Freund’s incomplete adjuvant, alums, bacterial toxins etc., are common adjuvants under investigation. Saponin based adjuvants have the ability to stimulate the cell mediated immune system as well as to enhance antibody production and have the advantage that only a low dose is needed for adjuvant activity. In the present study the importance of adjuvants, their role and the effect of saponin in immune system is reviewed.  相似文献   

Improvement of the efficacy of influenza vaccination （H5N1） in chicken by using extract of Cochinchina momordica seed （ECMS）   总被引：1，自引：0，他引：1  

Rajput ZI  Xiao CW  Hu SH  Arijo AG  Soomro NM 《Journal of Zhejiang University. Science. B》2007,8(5):331-337

Seeds of a Chinese traditional medicine plant, Cochinchina momordica were used in the present study for the improvement of influenza vaccine （HSN 1） in chicken. Crude extraction from Cochinchina momordica seed （ECMS） was obtained by ethanol extraction method. In experiment No. 1, two weeks old chickens were immunized with influenza vaccine （HSN1） alone or combined with ECMS （5, 10, 20, 40 and 80 μg/dose）. Serum IgG antibody levels （by ELISA） as well as effects on dally weight gain were measured on 0, 7, 14 and 28th day after immunization. Results revealed that all ECMS groups numerically increased the antibody levels while 10 and 20 μg/dose groups significantly （P〈0.05） enhanced total IgG antibody on day 28, when compared with control. Average daily weight gain was also significantly higher in 20 μg/dose ECMS group. Adjuvant effect was also confirmed in experiment No. 2 when chickens were immunized with 20 μg/dose ECMS and antibody titer was measured through hemagglutination inhibition （HI）. It is concluded that ECMS has potential to improve the immune responses and deserve further study as an adjuvant.  相似文献   

Effects of Jigsaw III technique on achievement in written expression     

Abdullah??ahinEmail author 《Asia Pacific Education Review》2011,12(3):427-435

The objective of this paper is to compare the Jigsaw III technique (of cooperative learning) with the instructional teacher-centered teaching method in six graders in terms of the effect of written expression on their academic success. The universe of the study consists of 71 sixth-grade students studying during 2009–2010 academic term in a primary school in the province of Erzurum. Two classes were randomly selected: one (n = 35) of which was the control group where teacher-centered teaching method was applied, the other being experimental group (n = 36) where the Jigsaw III technique was applied. In the study, one of the most common application, pretest/posttest with control group experimental design, was chosen. The data regarding the academic success of the groups were collected by means of the achievement test in Turkish course as pretest, posttest and retention test; the students’ opinions about the group works were obtained through feedback form, group work opinionnaire, and data were analyzed through 11.5 SPSS program. The results of the statistical analysis of teaching a written expression course showed that the experimental group did significantly better than the control group in terms of academic success. In addition, it can be said that the students had positive impressions on the Jigsaw III technique.  相似文献