排序方式： 共有49条查询结果，搜索用时 15 毫秒
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Remy Dou Eric Brewe Geoff Potvin Justyna P. Zwolak Zahra Hazari 《International Journal of Science Education》2018,40(13):1587-1605
Modeling Instruction (MI), an active-learning introductory physics curriculum, has been shown to improve student academic success. Peer-to-peer interactions play a salient role in the MI classroom. Their impact on student interest and self-efficacy – preeminent constructs of various career theories – has not been thoroughly explored. Our examination of three undergraduate MI courses (N?=?221) revealed a decrease in students’ physics self-efficacy, physics interest, and general science interest. We found a positive link from physics interest to self-efficacy, and a negative relationship between science interest and self-efficacy. We tested structural equation models confirming that student interactions make positive contributions to self-efficacy. This study frames students’ classroom interactions within broader career theory frameworks and suggests nuanced considerations regarding interest and self-efficacy constructs in the context of undergraduate active-learning science courses. 相似文献
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ABSTRACTPurpose: The present study aims to determine and compare the views of directors and users of public libraries on the use of social media for the marketing of library services.Methodology: Data collection was done through two researcher-made questionnaires, one from the viewpoints of directors and one investigating the views of users. The questionnaires’ validity was done by four libraries and Information Science professionals, and the reliability was determined by the Cronbach’s alpha coefficient. The statistical population of this research is made up of all directors and users of 12 public libraries of the city of Isfahan, one of the largest cities in Iran.Findings: In users’ viewpoints, the “interaction capability” is the most important feature that social media marketing can have in libraries. From the viewpoints of the directors, “creating a true picture of the role of the library” and “informing users about library services” are among the most important reasons for the marketing of libraries in the social media. From the perspective of both groups, the Telegram is the most appropriate medium for the marketing of library services.Results: To maintain their customers and their market position, libraries need to use more exciting tools such as social media for marketing. Library directors of this study emphasized on this fact and 79.1% of users expressed interest in receiving library information through social media.Value: The findings of this study would help the library directors to better decide on the marketing of their library services in social media.Type of the study: Scientific-Research 相似文献
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Zehra Jamil Amna A. Saeed Sarosh Madhani Safia Baig Zahra Cheema Syeda Sadia Fatima 《Anatomical sciences education》2019,12(5):550-560
This study evaluated effect of mental rotation (MR) training on learning outcomes and explored effectiveness of teaching via three-dimensional (3D) software among medical students with diverse spatial intelligence. Data from n = 67 student volunteers were included. A preliminary test was conducted to obtain baseline level of MR competency and was utilized to assign participants to two experimental conditions, i.e., trained group (n = 25) and untrained group (n = 42). Data on the effectiveness of training were collected to measure participants’ speed and accuracy in performing various MR activities. Six weeks later, a large class format (LCF) session was conducted for all students using 3D software. The usefulness of technology-assisted learning at the LCF was evaluated via a pre- and post-test. Students’ feedback regarding MR training and use of 3D software was acquired through questionnaires. MR scores of the trainees improved from 25.9±4.6 points to 28.1±4.4 (P = 0.011) while time taken to complete the tasks reduced from 20.9±3.9 to 12.2±4.4 minutes. Males scored higher than females in all components (P = 0.016). Further, higher pre- and post-test scores were observed in trained (9.0±1.9 and 12.3±1.6) versus untrained group (7.8±1.8; 10.8±1.8). Although mixed-design analysis of variance suggested significant difference in their test scores (P < 0.001), both groups reported similar trend in improvement by means of 3D software (P = 0.54). Ninety-seven percent of students reported technology-assisted learning as an effective means of instruction and found use of 3D software superior to plastic models. Software based on 3D technologies could be adopted as an effective teaching pedagogy to support learning across students with diverse levels of mental rotation abilities. 相似文献
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Simin Sohrabi Azim Akbarzadeh Dariush Norouzian Ali Farhangi Mehri Mortazavi Mohammad Reza Mehrabi Mohsen Chiani Zahra Saffari Soheil Ghassemi 《Indian journal of clinical biochemistry : IJCB》2011,26(4):354-359
The attempt is made to produce recombinant factor VIII but the first step in producing such product is production and purification
of rabbit’s polyclonal antibody against factor VIII. The second and third steps involve monoclonal antibody and recombinant
factor VIII production. Factor VIII is one of the most important coagulating factor where its deficiency leads to diseases
like hemophilia type A or classic. It is an inherited disease. Previously, it was obtained through fractionation of blood
plasma of blood donors. After processing, factor VIII could be used to manage such patients. Due to transfer of viral disease
like hepatitis and HIV through factor VIII obtained by fractionation, high cost of production, insufficiency of the donors
and the process of virus removal, thus production of factor VIII through recombinant technology can be useful and helpful.
The reaction between antibody and antigen is one the most specific reaction; therefore, such reaction can be employed to identify
factor VIII. Thereby, rabbits were injected several times with adjuvant-linked antigen to produce antibody. The antibody was
separated from the blood sample, purified and used to identify factor VIII in the research. 相似文献
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Jennifer D. Cribbs Zahra Hazari Gerhard Sonnert Philip M. Sadler 《Child development》2015,86(4):1048-1062
This article empirically tests a previously developed theoretical framework for mathematics identity based on students’ beliefs. The study employs data from more than 9,000 college calculus students across the United States to build a robust structural equation model. While it is generally thought that students’ beliefs about their own competence in mathematics directly impact their identity as a “math person,” findings indicate that students’ self‐perceptions related to competence and performance have an indirect effect on their mathematics identity, primarily by association with students’ interest and external recognition in mathematics. Thus, the model indicates that students’ competence and performance beliefs are not sufficient for their mathematics identity development, and it highlights the roles of interest and recognition. 相似文献
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Zahra Saffari Maryam Farahnak Zarabi Hasan Aryapour Alireza Foroumadi Ali Farhangi Soheil Ghassemi Azim Akbarzadeh 《Indian journal of clinical biochemistry : IJCB》2015,30(2):140-149
Chemotherapy drugs, used for prevention of uncontrolled cell proliferation in certain tissues as well as inducing apoptosis in tumor cells, are important candidates for treatment of cancer. The synthesized 2-amino-4H-chromene-3-carbonitrile derivatives effective on cancerous cells resistant to other drugs such as Paclitaxel were used due to their ability in induction of apoptosis. The growth inhibitory and inducing apoptosis activities were determined. In order to make it target-oriented, the best compound was conjugated with gold nanoparticles (NPs) by aspartic acid with chemical reduction method. Cytotoxicity effect of 2-amino-4H-chromene-3-carbonitrile derivatives against the T47D breast cancer cell line was determined by MTT assay. The synthesis of gold NPs was confirmed by transmission electron microscopy, UV–Vis and dynamic light scattering. To assess the effects of compounds on the process of apoptosis, staining methods with acridine orange–ethidium bromide and Hoechst staining by fluorescence microscopy and DNA fragmentation by the diphenylamine method were used. The synthesized compounds containing two NH2 groups on benzene rings, demonstrated more cytotoxicity effect. The effect of conjugation with gold NPs and the induction of apoptosis were studied with the best compound. The cytotoxicity effects of the synthesized 2-amino-4H-chromene-3-carbonitrile compounds were changed by replacement of NO2 group on thiol ring with different chemical groups on the benzene ring. Analyses of treated cell lines by conjugated and non-conjugated forms of compounds verified their ability in inducing apoptosis while conjugated form demonstrated higher apoptosis. 相似文献
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Zahra Zamani 《Journal of Adventure Education & Outdoor Learning》2016,16(2):172-189
Outdoor preschools are critical for children’s play and development. Integrating observational and interview methods, this study examined four-to-five-year-old children’s cognitive play experiences in an outdoor preschool with natural, mixed and manufactured zones. The observational results indicated that the natural and mixed zones offered a diverse spectrum of cognitive play, were supportive of different learning styles and expanded their understanding about the world. Children preferred the diverse, challenging and constantly evolving natural settings in these zones. Integrating diverse natural and manufactured settings with loose elements, the mixed zone supported considerable opportunities for functional, exploratory and games with rules play behaviors. The accessible loose materials inspired children’s imagination, social engagement and games. In contrast, the manufactured zone offered the most functional and non-play behaviors, and was perceived as an unexciting, predictable and tedious environment. The findings suggest incorporating natural features and settings in outdoor preschools to support a diverse spectrum of cognitive play. 相似文献