Relationships Differentiation: Cross-ethnic Comparisons in the Malaysian Workplace     

Hassan Abu Bakar  Haslina Halim  Che Su Mustaffa  Bahtiar Mohamad 《Journal of Intercultural Communication Research》2016,45(2):71-90

This research examines how Malaysian managers and employees interpret and embody leader–member relationships differentiation. To analyze this question, we conducted a thematic analysis of top management, middle management and supporting dialogue group discussions. Results showed that leader–member relationships differentiation is a symbol that is essential for the creation and sustenance of leader’s conceptual skills, communication openness, respect, trust, and age differentiation. These findings validate our proposition of leader–member relationships differentiation in Malaysian workplace and empirical support for the central roles of communication exchange processes in workgroups.  相似文献   

Utilization of discrete transforms to conquer the problems of multi-tone systems     

Samir Abd Elghafar  Salaheldin M. Diab  Bassiouny M. Sallam  Emad S. Hassan  Mona Shokair  Waleed Al-Nauimy  Moawad I. Dessouky  El-Sayed M. El-Rabaie  Saleh Alshebeili  Fathi E. Abd El-Samie 《Journal of The Franklin Institute》2014

This paper presents a new implementation of discrete multi-tone (DMT) systems based on different discrete transforms that include the discrete sine transform (DST), discrete cosine transform (DCT), and discrete wavelet transform (DWT). The implementation also considers time-domain equalization to mitigate channel distortion. Compared to the fast Fourier transform discrete multi-tone (FFT-DMT) system, the proposed implementations have an advantage in that their energy-compaction property helps in reducing the channel effects. The performance of the DST-DMT, DCT-DMT, DWT-DMT, and FFT-DMT systems, employing a time-domain equalizer (TEQ), is investigated in the paper. It has been demonstrated by computer simulations that the proposed implementations outperform the FFT-DMT system and that the utilization of the TEQ can lead to higher bit rates  相似文献   

A new on-line observer-based controller for leader-follower formation of multiple nonholonomic mobile robots     

M. Hassan  E. Aljuwaiser  R. Badr 《Journal of The Franklin Institute》2018,355(5):2436-2472

In this paper, a novel on-line observer-based trajectory tracking strategy for leader-follower formation of multiple nonholonomic mobile robots is developed. In the proposed strategy, a leader robot follows a certain trajectory whereas a number of followers track the leader as specified by a formation protocol. Unlike other techniques in the literature, a predefined trajectory is not required, and it can be changed on-line. Moreover, this strategy aims to have a fast transient response without showing undesired overshoots. To achieve this feature, a new observer is introduced. Based on the output of that observer, a control strategy with two components is derived. The first control component is responsible for tracking the desired trajectory, whereas the second control component is used to regulate the robot to its desired steady state position. The stability of the closed loop control system is investigated. Applications of the proposed observer-based controller to different case studies are presented to illustrate the effectiveness, robustness and applicability of the developed technique. To show the superiority of proposed controller, its performance in a trajectory tracking application is compared to that of a Lyapunov-based controller.  相似文献   

The Effects of Onion Consumption on Prevention of Nonalcoholic Fatty Liver Disease     

Hadi Emamat  Forough Foroughi  Hassan Eini-Zinab  Azita Hekmatdoost 《Indian journal of clinical biochemistry : IJCB》2018,33(1):75-80

It is well known that dietary intakes play a pivotal role in pathogenesis of nonalcoholic fatty liver disease (NAFLD)/nonalcoholic steatohepatitis (NASH); however, the role of each component of diet has not yet been elucidated. Our objective was to evaluate the effects of onion consumption on prevention of NAFLD/NASH development. Sprague–Dawley rats were fed either high-fat, high sugar diet (model group), or high-fat, high sugar diet plus 7% onion powder (model + onion), or chow diet ad libitum for 7 weeks. Serum levels of fasting glucose, triglyceride, cholesterol, liver enzymes, insulin, and hepatic tumor necrosis factor-alpha (TNF-α) gene expression were determined. Hepatic histology was examined by H&E stain. Model + onion group had significantly lower hepatic steatosis, ballooning, lobular inflammation, and portal inflammation (p < 0.001), lower hepatic TNF-α gene expression (p < 0.001), lower plasma levels of ALT (p = 0.026), AST (p = 0.041), insulin (p < 0.001), TG (p = 0.041), and glucose (p = 0.009) compared with model group; however, weight gain, food intake, plasma total cholesterol and LDL levels were not significantly different between these two groups. Our data indicate that regular consumption of onion can prevent NAFLD even in the presence of the other risk factors such as obesity, hypercholesterolemia, and high energy, fat, and sugar intakes.  相似文献   

Search systems and their features: What college students use to find and save information     

Jingjing Liu  Hassan Zamir  Yuan Li  Samantha K. Hastings 《Library & information science research》2018,40(2):118-124

College students have often been surveyed about their general information seeking behaviors. However, little has been done to explore what specific system features they use to find and save information when they are working on their real-life tasks. In this study, 32 college students were invited to an information interaction lab for a session in which they recalled a recently finished task and worked on a to-be-finished task using a computer in the lab. They were asked to complete questionnaires regarding what systems they used to finish their tasks and what features were helpful for searching and for saving information. Results showed that college students rely more heavily on the Internet sources than on library sources, even for their course related work. The study identified fourteen categories of system features helpful for information search and eight categories helpful for information saving. The findings have implications for designing systems that will better help people accomplish their tasks.  相似文献   

A data-mining approach to biomarker identification from protein profiles using discrete stationary wavelet transform     

Montazery-Kordy H  Miran-Baygi MH  Moradi MH 《Journal of Zhejiang University. Science. B》2008,9(11):863-870

Objective: To develop a new bioinformatic tool based on a data-mining approach for extraction of the most infor-mative proteins that could be used to fred the potential biomarkers for the detection of cancer. Methods: Two independent datasets from serum samples of 253 ovarian cancer and 167 breast cancer patients were used. The samples were examined by surface-enhanced laser desorption/ionization time-of-flight mass spectrometry (SELDI-TOF MS). The datasets were used to extract the informative proteins using a data-mining method in the discrete stationary wavelet transform domain. As a dimensionality re-duction procedure, the hard threshoiding method was applied to reduce the number of wavelet coefficients. Also, a distance measure was used to select the most discriminative coefficients. To find the potential biomarkers using the selected wavelet coefficients, we applied the inverse discrete stationary wavelet transform combined with a two-sided t-test. Results: From the ovarian cancer dataset, a set of five proteins were detected as potential biomarkers that could be used to identify the cancer patients from the healthy cases with accuracy, sensitivity, and specificity of 100%. Also, from the breast cancer dataset, a set of eight proteins were found as the potential biomarkers that could separate the healthy cases from the cancer patients with accuracy of 98.26%, sensitivity of 100%, and specificity of 95.6%. Conclusion: The results have shown that the new bioinformatic tool can be used in combination with the high-throughput proteomic data such as SELDI-TOF MS to find the potential biomarkers with high discriminative power.  相似文献   

Implication de l'analyse de productions d'élèves dans la formation des maîtres du primaire     

Lucie DeBlois  Hassan Squalli 《Educational Studies in Mathematics》2002,50(2):212-237

Several studies have shown that pre-service teachers enter their pre-service training with already formed conceptions pertaining to teaching and learning. Pre-service teachers are considered as epistemologically complex beings with varying postures they adopt according to differing contexts. This article looks at the meanings pre-service teachers attribute to pupil errors and how these meanings evolved over the course of a 15 week course in mathematics education. Pre-service teachers were interviewed at two intervals during their first semester: at mid session and at the end. First, we identified the various kinds of analyses they brought to bear upon pupil errors as well as the interventions they suggested to rectify these errors. Then, we conducted a statistical analysis of the changes in the type of interventions suggested. Four trend indicators were created to help understand these changes. When analysing pupil's errors, pre-service teachers identified specific conceptual elements without situating them within a global context. This led to piecemeal interventions about how pupils ought to correct their errors. In conclusion, pre-service teachers' appear to base their analyses of pupils's errors upon an epistemological positioning ween title ‘former-pupil stance‘. This stance seems to create a resistance to changing their conceptions regarding the teaching and learning of mathematics. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   

The effect of content representation design principles on users’ intuitive beliefs and use of e-learning systems     

Hosam Al-Samarraie  Hassan Selim  Fahed Zaqout 《Interactive Learning Environments》2016,24(8):1758-1777

A model is proposed to assess the effect of different content representation design principles on learners’ intuitive beliefs about using e-learning. We hypothesized that the impact of the representation of course contents is mediated by the design principles of alignment, quantity, clarity, simplicity, and affordance, which influence the learner’s intuitive beliefs about using e-learning systems. The model was empirically validated using data collected from a survey administered to university students. This study demonstrates that these design principles are essential predictors of learners’ intuitive beliefs, which in turn directly influence their decisions about using e-learning systems. The findings provide system designers with quasi-quantitative managerial insights into how to motivate users to continue using e-learning systems.  相似文献   

The alignment between the fourth grade Lebanese science curriculum and classroom assessments     

Karma El Hassan  Mariam Baassiri 《Education 3-13》2019,47(5):612-624

The purpose of this study was to investigate the alignment between the fourth-grade summative classroom assessments and the ‘Matter and Energy’ unit in the Lebanese science curriculum using: content and cognitive levels. Summative assessments were collected from a sample of 17 schools. The alignment between the classroom assessments and the Lebanese science curriculum were examined using three instruments: Curriculum Coding Sheet, Items Coding Sheet, and Item Analysis Sheet. The curricular learning objectives were used for matching the test items to the learning objectives in terms of content. Findings showed moderate content alignment; further analysis revealed that public schools had higher content alignment, and they covered a wider range of topics. In terms of cognitive level, there was a low alignment between the assessments collected and the curriculum; however, there were items that had higher cognitive level. Recommendations for curriculum developers and future research are discussed in light of these findings.  相似文献   

Convergence Between Platforms in the Newsroom     

Mohamed Morsy Hassan 《Journalism Practice》2019,13(4):476-492

Through ethnographic observation and content analysis, this study aims to classify the Al-Jazeera Mubasher (AJM) newsroom according to the Schantin model of newsrooms, describe the network’s convergence level based on the Dailey, Demo, and Spillman Dynamic Scale Model, and present a unique model elucidating how, specifically, convergence works at AJM. Based on the Schantin model of newsrooms, AJM can be classified as a second-generation newsroom, a “cross-media platforms newsroom.” Convergence among the different platforms of AJM is considerable, but still below full convergence level. Accordingly, the AJM newsroom can be classified into the fourth level of the Dailey et al. Dynamic Scale Model — “content sharing.” The unique AJM-specific model presented near the end of this paper depicts the ways in which different AJM platforms function and interact inside the newsroom, explains the degree of convergence between platforms, and classifies the newsroom in terms of its convergence level.  相似文献