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71.
1IntroductionZrO2-containing ceramics receive extensive attentionbecause of their great i mportance in science and tech-nology[1,2].Zirconia doped with divalent or trivalentoxides has been proved to be an i mportant solid elec-trolyte,finding wide usage in oxygen sensors and fuelcells.It is also well known that Y2O3-stabilized tetra-gonal ZrO2polycrystals(Y-TZP)possess excellent me-chanical properties at roomtemperature,combining astrength higher than1000MPa and a toughness be-tween6MPa·… 相似文献
72.
MUNIR Muhammad JAMIL Muhammad BALOCH Jalal-ud-din KHATTAK Khalid Rehman 《Journal of Zhejiang University. Science. B》2004,(4)
INTRODUCTIONManyangiospermsflowerataboutthesametimeeveryyear.Thisoccurseventhoughtheymayhavestartedgrowingatdifferenttimes.Theirfloweringisaresponsetothechanginglengthofdayandnightastheseasonprogresses.Intheearly20thcentury,amutationintobaccocultivarMary-landMammothwasdiscoveredthatpreventedtheplantfromfloweringinthesummerasnormalto-baccoplantsdo.慚arylandMammoth?wouldnotbloomuntillateDecember(GarnerandAllard,1920).Thisreflectedtheeffectofphotoperiodonflowering.Afterwards,onthebasisofl… 相似文献
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Technological devices are widely used in various forms and for various purposes with educational systems. Teachers are required to not only use technology with the utmost efficiency, but to also act as role models for students in terms of appropriate use of technology. However, many teacher candidates are not aware of the educational use of technology classroom; hence, technology must be especially integrated into undergraduate teacher training programs through courses and field experience. Various methods, techniques, tools, and equipment are utilized in order to improve the efficiency of teaching and learning processes in the classroom, of which digital storytelling is one of them. The use of digital stories in education is beneficial both for teachers and students. For this reason, this research investigates the use of digital stories in mathematics education as well as the opinions and experiences of mathematics teacher candidates about creating, using, and evaluating digital stories. Data of the study were collected via semistructured interviews, transcribed, and content analyzed. The results of the study showed that prospective math teachers preferred GoAnimate program to create digital stories due to its ease of use, design, and the characters and visuals it suggests. Furthermore, the prospective teachers were found to aspire to use digital stories in their future careers. 相似文献
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Saira Hanif Soroya Ali Farooq Khalid Mahmood Jouni Isoaho Shan-e Zara 《Information processing & management》2021,58(2):102440
Individuals seek information for informed decision-making, and they consult a variety of information sources nowadays. However, studies show that information from multiple sources can lead to information overload, which then creates negative psychological and behavioral responses. Drawing on the Stimulus-Organism-Response (S-O-R) framework, we propose a model to understand the effect of information seeking, information sources, and information overload (Stimuli) on information anxiety (psychological organism), and consequent behavioral response, information avoidance during the global health crisis (COVID-19). The proposed model was tested using partial least square structural equation modeling (PLS-SEM) for which data were collected from 321 Finnish adults using an online survey. People found to seek information from traditional sources such as mass media, print media, and online sources such as official websites and websites of newspapers and forums. Social media and personal networks were not the preferred sources. On the other hand, among different information sources, social media exposure has a significant relationship with information overload as well as information anxiety. Besides, information overload also predicted information anxiety, which further resulted in information avoidance. 相似文献
75.
Omer Acar Lutfullah Turkmen Anita Roychoudhury 《International Journal of Science Education》2013,35(9):1191-1206
Students' poor argumentation in the context of socio‐scientific issues has become a concern in science education. Identified problems associated with student argumentation in socio‐scientific issues are misevaluation of evidence, naïve nature of science conceptualizations, and inappropriate use of value‐based reasoning. In this theoretical paper, the authors propose that incorporation of decision‐making research findings to argumentation research may help students overcome these problematic areas. For this aim, decision‐making research findings about value‐focused decision‐making framework and common heuristics have been discussed. Specifically, the authors propose that explicit teaching of argumentation research should provide students a decision‐making framework in which students can consider their values about a socio‐scientific issue and assess different alternatives as well as incorporate teaching about common heuristics. The authors believe that this incorporation is necessary for a quality student argumentation in socio‐scientific issues. 相似文献
76.
This study investigated the effect of the Science Writing Heuristic (SWH) approach on grade 9 students’ understanding of chemical change and mixture concepts. Four intact classes taught by two chemistry teachers from a Turkish public high school were selected for the study; one class was assigned as the treatment group, and the other class was assigned as the comparison group. Students in the treatment group were instructed by the SWH approach, while those in the comparison group were instructed with traditionally designed chemistry instruction. Tests measuring students’ conceptual understanding in the units of chemical change and mixture were administered as pre- and posttest for both groups. At the end of the instruction, semistructured interviews were conducted with 13 students from the treatment group and eight students from the comparison group. ANCOVA results revealed that the SWH approach was superior to the traditional approach on students’ understanding of chemical change and mixture concepts. Interview results indicated that students in the treatment group demonstrated better scientific understanding of chemical change and mixture concepts compared to those in the comparison group. 相似文献
77.
Omer F. Ozdemir 《Instructional Science》2013,41(1):81-103
The purpose of this study is to understand the nature of pre-instructional knowledge transferred by students into problem situations and the change process on students’ knowledge system during classroom discussions. This study was framed by two interrelated theoretical frameworks on knowledge structures, phenomenological primitives and coordination classes. The data were collected through problem solving sessions on turning effect of forces (torques or moment) from ten participants who were seeking a degree to become physics teachers. The analysis of data showed that, in this particular context, students’ pre-instructional ideas can be characterized according to phenomenological primitives. The theoretical constructs of the coordination classes generated meaningful results to understand students’ particular difficulties in transferring the moment concept across different contexts and the change process on students’ knowledge system. The major stimulator of the change process emerged as the students’ becoming aware of the epistemological nature of their knowledge structures and searching the causal mechanisms behind physical phenomena. 相似文献
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Purpose: This study identifies perceptions of faculty about the current level of information literacy (IL) skills of engineering students in higher education in Pakistan. It may help to design better IL programs for the tertiary level students. Methodology: The study used ACRL Information Literacy Competency Standards for Science and Engineering/Technology as the basis to assess these perceptions. Teachers of the National University of Science & Technology (NUST), who were teaching engineering students of postgraduate level, were selected as population. A structured questionnaire was sent to 113 faculty members and the response remained 80 percent. Paired samples t-test was used for data analysis through Statistical Package for Social Sciences (SPSS). Findings: Research indicates that faculty perceived IL skills of their PhD level students higher than those of MS level students. Originality: The term “Information literacy” is yet new on the Pakistani library scene. Regarding perceptions of faculty about information literacy skills of their students so far no study has been carried out in Pakistan. This study will help to identify existing IL skills of Pakistani students of university level, their requirements and how these requirements can be best fulfilled. 相似文献
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This study explored the status of library software being used in the libraries of higher education institutions (HEIs) of Pakistan. A quantitative survey method was used. The population of this study was central/main libraries of all HEIs of Pakistan recognized by the Higher Education Commission (HEC). A questionnaire was designed after review of literature to collect data. The questionnaire was sent to all head librarians. The findings reveal that majority of the libraries had started automation. The libraries of public and private sector institutions were not significantly different in automating their routines. The libraries were using a variety of software and Library Information Management System (LIMS), a free software was at the top in terms of number of users. Other popular software were WINISIS, Inmagic, Koha and VIRTUA. There were also examples of adoption of open source software. Majority of the libraries were doing automation in the absence of proper budget for software and allied activities. Similarly, libraries did not have up-gradation and training agreement with the software providers. The participant libraries reported the presence of cataloging, circulation, reports and OPAC modules in their software but most of the libraries did not mention the availability of modules like acquisition, serial and webopac. Software used by the libraries did not have national language support in most of the cases and ability to support regional languages was also negligible. 相似文献
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This study is qualitative in nature and aims at assessing the information needs and seeking behavior of educational administrators and finding related problems. Interviews of a purposive sample and review of related literature are among the major research methods. The study is based on interviews of 13 educational administrators and 32 information professionals from Punjab province and Islamabad Capital Territory (ICT) of Pakistan. The results correspond with the previous studies conducted in other countries. The educational administrators' information needs and seeking behavior reflect a kinship with their work settings and information environment that highlights a need to understand problem situations as an ancestor to understanding how they seek and use information. The study has identified a gap in the provision of needed information which hinders the realistic planning and decision making process. It has also highlighted the need of a National Information System for educational administrators in Pakistan. As this is the first study on this topic in Pakistan, the results can be useful to design information services and facilities for educational administrators in Pakistan and other developing regions of the globe with similar conditions. 相似文献