A simplified real-time camera-based attention assessment system for classrooms: pilot study     

Renawi  Abdulrahman  Alnajjar  Fady  Parambil  Medha  Trabelsi  Zouheir  Gochoo  Munkhjargal  Khalid  Sumaya  Mubin  Omar 《Education and Information Technologies》2022,27(4):4753-4770

Education and Information Technologies - Monitoring students' attention and engagement levels in classrooms are critical in promoting an interactive teaching process. Therefore, in addition to...  相似文献   

Simple operated multipurpose temperature control cryostat     

ABBAS T.A. OMAR M.S. 《浙江大学学报(A卷英文版)》2007,8(5):793-796

A suitable simple optical cryostat for optical, magneto-optical, electrical and thermo-electrical measurements was designed. It is suitable for use in a magnetic pool gap as narrow as less than 1 cm. Throughout a long period of time, the heat diffusion process of the cryostat can be easily operated at slow increase in sample temperature in a range 1.25 K/min at 200 K that will be reduced gradually to 0.66 K at room temperature. Liquid nitrogen was used to cool down the temperature. During the operation, the change in the measured energy gap of a semiconductor sample and other physical parameters resulting from the change of temperature can be corrected through the temperature coefficient of that parameter at the corresponding temperature. The cryostat was successfully used for all experiments mentioned above to measure the properties of a single crystal of GaP (Gallium Phosphate) semiconductor.  相似文献   

Higher education decisions in Peru: on the role of financial constraints,skills, and family background     

Juan F. Castro  Gustavo Yamada  Omar Arias 《Higher Education》2016,72(4):457-486

  相似文献   

Participation in online courses from the students’ perspective     

Betul Ozaydın Ozkara  Hasan Cakir 《Interactive Learning Environments》2018,26(7):924-942

The purpose of this study is to uncover factors that affect participation in online classes from the student’s perspective. Interest in the online environment has been increasing and renders the opinions of students participating in online courses more important since the opinions of students in this environment are closely related to interaction. It has been seen that lack of interaction creates a sense of loneliness, which causes students to drop their classes. For this reason, a qualitative study has been conducted about student experiences on the use of methods that increase interaction in an online environment and participation. Participants were given tasks based on collaboration, special attention was paid to make sure that the setting in which the participants found themselves was in accordance with the principles of the community of inquiry, computerized equipment was used to facilitate online interactions. 15 students worked based on collaboration and 15 students worked individually. Data was collected with interviews and reflection reports. Open, axial and selective coding was made by using the theorizing method. At the end of the study, it was determined that participation in online environment was affected in both groups by factors such as personal approaches, changing variables, mediated attributes.  相似文献   

Beyond Community College Accountability: Using Data to Investigate Best Practices for Institutional Improvement     

Omar S. López 《Community College Journal of Research & Practice》2013,37(1):86-90

The Voluntary Framework of Accountability (VFA) launched in 2011 is the first national system of community college accountability. Sponsored by the American Association of Community Colleges (AACC) in collaboration with the Association of Community College Trustees and the College Board, the VFA will shortly report to the public on measures of student progress and learning outcomes and on measures of workforce, economic, and community development. The author of this paper proposes that AACC move beyond community college accountability toward creating and sustaining, among college administrators, a common culture of VFA data use to investigate best practices for institutional improvement. To advance this proposition, the discourse presented centers on a proof-of-concept model. The study uses longitudinal data to illustrate its potential for community college administrators to identify best practices for improving institutional performance in first-year college retention.  相似文献   

Using Extraction Experiment as a Tool for Teaching Scientific Process Skills     

Hasan  ōzyildirim  Husnuye Durmaz 《美中教育评论》2013,(10):754-762

Laboratory work educates students about the ＂processes of science＂. But it is suggested that students＇ learning level is low because of limited application of science processes in their laboratory work. Extraction experiment was chosen as the topic since it allows students to apply many of their basic chemistry knowledge, and it can be readily to gain understanding of scientific proceses required for an investigation. This study has been carried out with 40 students who are in the first year of Science Teaching Division at Trakya University, Faculty of Education. These students were divided into two groups of the experimental group and the control group, each group containing 20 students. The students of the experimental group were given knowledge about basic scientific process skills, and a procedure in detail to follow was given. But the students of the control group was given a standard procedure. The students of both groups were asked about what and why they did while they were performing the laboratory investigation. We observed that the experimental group students used the basic process skills, understood the extraction experiment, and realized what and why they did from this activity better than the control group students. The control group students did not know why they did laboratory work and they tended to focus on completing the task rather than learning from it. We considered that the experience would be helpful for students to improve scientific process skills if the students successfully acquired procedural understanding. Students＂ scientific processskills will develop as long as they use the skills.  相似文献   

Construction of nationhood through education in Malaya: revisiting the Barnes and Fenn-Wu Reports     

Moses Samuel  Mahmud Hasan Khan 《Asia Pacific Journal of Education》2013,33(3):249-260

This article provides an analysis of two colonial reports, the Barnes and the Fenn-Wu Reports on education in the British colony of Malaya. The popular stance on the Barnes and the Fenn-Wu Reports is that one is an effect or reply to the other. We argue on the contrary that the two reports construct a common argument on nation-building which becomes apparent through a dialogic reading of the reports. We show how the two reports, written in the 1950s, reflect the anxiety of the colonial rulers in constructing a nation and the ethnic communities (the Malays and the Chinese) in pre-independent Malaya. These communities were constructed not without their inherent antagonism as well as their reciprocal vulnerabilities in a future political state. This act of articulation is predominantly a political act constructed through a complex web of interdiscursivity and intertextuality. The spectres of the Barnes and the Fenn-Wu Reports continue to surface in education and nation-building discourse in modern-day Malaysia.  相似文献   

Single-cell yolk-shell nanoencapsulation for long-term viability with size-dependent permeability and molecular recognition     

Li Wang  Yu Li  Xiao-Yu Yang  Bo-Bo Zhang  Nelle Ninane  Henk J Busscher  Zhi-Yi Hu  Cyrille Delneuville  Nan Jiang  Hao Xie  Gustaaf Van Tendeloo  Tawfique Hasan  Bao-Lian Su 《国家科学评论(英文版)》2021,8(4)

Like nanomaterials, bacteria have been unknowingly used for centuries. They hold significant economic potential for fuel and medicinal compound production. Their full exploitation, however, is impeded by low biological activity and stability in industrial reactors. Though cellular encapsulation addresses these limitations, cell survival is usually compromised due to shell-to-cell contacts and low permeability. Here, we report ordered packing of silica nanocolloids with organized, uniform and tunable nanoporosities for single cyanobacterium nanoencapsulation using protamine as an electrostatic template. A space between the capsule shell and the cell is created by controlled internalization of protamine, resulting in a highly ordered porous shell-void-cell structure formation. These unique yolk-shell nanostructures provide long-term cell viability with superior photosynthetic activities and resistance in harsh environments. In addition, engineering the colloidal packing allows tunable shell-pore diameter for size-dependent permeability and introduction of new functionalities for specific molecular recognition. Our strategy could significantly enhance the activity and stability of cyanobacteria for various nanobiotechnological applications.  相似文献   

TEAMWORK IN ISRAELI ARAB-BEDOUIN SCHOOL-BASED MANAGEMENT     

by Omar  Mizel 《British Journal of Educational Studies》2009,57(3):305-327

ABSTRACT:  Throughout the western world a leading example of the educational reforms that have been implemented in the late twentieth and twenty-first century is School-Based Management (SBM), a system designed to improve educational outcome through staff teamwork and self-governance. This research set out to examine the efficacy of teamwork in ten SBM-designated Arab-Bedouin elementary schools in Israel. Two explicit issues were examined: (1) What impact did SBM have on the development of teamwork among the schools' staff? (2) Does the Arab-Bedouin social-cultural context influence implementation of teamwork in SBM schools? The research method consisted of a questionnaire to which 361 teachers/school principals replied, and a semi-structured interview with 30 of the respondents. Results of this study demonstrate that true teamwork does not exist in the schools studied, despite their SBM official status, primarily because the concept of teamwork clashes with the social/cultural norms of traditional Arab-Bedouin society and thus exacerbates conflicts among staff, which then impedes implementation of SBM. In conclusion, this research recommends that for SBM to enable traditional Arab-Bedouin society to benefit from managing its own schools, broad educational changes such as this must be introduced gradually, in a customised, culturally sensitive manner.  相似文献   

Probabilistic fuzzy logic controller for uncertain nonlinear systems     

Omar Shaheen  Ahmad M. El-Nagar  Mohammad El-Bardini  Nabila M. El-Rabaie 《Journal of The Franklin Institute》2018,355(3):1088-1106

This paper proposes a probabilistic fuzzy proportional - integral (PFPI) controller for controlling uncertain nonlinear systems. Firstly, the probabilistic fuzzy logic system (PFLS) improves the capability of the ordinary fuzzy logic system (FLS) to overcome various uncertainties in the controlled dynamical systems by integrating the probability method into the fuzzy logic system. Moreover, the input/output relationship for the proposed PFPI controller is derived. The resulting structure is equivalent to nonlinear PI controller and the equivalent gains for the proposed PFPI controller are a nonlinear function of input variables. These gains are changed as the input variables changed. The sufficient conditions for the proposed PFPI controller, which achieve the bounded-input bounded-output (BIBO) stability are obtained based on the small gain theorem. Finally, the obtained results indicate that the PFPI controller is able to reduce the effect of the system uncertainties compared with the fuzzy PI (FPI) controller.  相似文献