Institution
Tunis University
Education•Tunis, Tunisia•
About: Tunis University is a education organization based out in Tunis, Tunisia. It is known for research contribution in the topics: Population & Thin film. The organization has 11745 authors who have published 15400 publications receiving 154900 citations. The organization is also known as: University of Tunis & UT.
Topics: Population, Thin film, Band gap, Nonlinear system, Cluster analysis
Papers published on a yearly basis
Papers
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TL;DR: This study proposes four relationships between two dimensions of Felder-Silverman learning style and four genres of computer games, which can be exploited by teachers and E-Learning recommendation systems in order to provide more personalized recommendations to learners.
Abstract: Computer based games for learning, like any other computer games, have different genres. They can be categorized as action, puzzle, strategy, and so on. On the other hand, different learners have different characteristics, such as learning styles, personality and cognitive traits. Because of that, they receive and process information differently. Recommending computer based games for learning, based on which genre suits a learner’s characteristics best, could enhance learners’ motivation and lead to a better learning experience. In this context, this study investigates the relationship between one of the learner characteristics, namely learning styles, and genres of games. In particular, this study proposes four relationships between two dimensions of Felder-Silverman learning style and four genres of computer games. In order to validate the proposed relationships, experimentation was conducted in a tertiary school in Tunisia (ISIG Kairouan) in which 74 participants answered two questionnaires about preferences on genres of games and learning styles. Data gathered from the instruments was analyzed through the use of the statistical test Chi-square. Results of the experimentation validated two relationships among four and rejected two. The confirmed relationships can be exploited by teachers and E-Learning recommendation systems in order to provide more personalized recommendations to learners.
46 citations
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TL;DR: In this article, the stability of a tunnel face driven by a pressurized shield is investigated in the light of a limit analysis kinematic approach formulated in the context of the modified Hoek-Brown strength criterion.
Abstract: SUMMARY
The stability of a tunnel face driven by a pressurized shield is investigated in the light of a limit analysis kinematic approach formulated in the context of the modified Hoek–Brown strength criterion. The analysis focuses on evaluating the destabilizing effects induced by seismic loading. The pseudo-static approach is adopted to account for the effects of inertial forces developed in the rock mass by the passage of seismic waves. Taking advantage of the ability to compute analytically, the expressions of the support functions for the modified Hoek–Brown strength criterion, rigorous limit analysis solutions can be derived semi-analytically for the tunnel face stability. Particular emphasis is given to the description of the Horn failure mechanism and associated lower bound estimates of the limit face supporting pressure. The approach is then applied to investigate the influence of some relevant strength and loading parameters in the tunnel face stability.Copyright © 2013 John Wiley & Sons, Ltd.
46 citations
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TL;DR: The Arabic version of the ODI adapted to the Saudi population has high metrological qualities and further studies assessing its responsiveness to change should be conducted.
46 citations
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TL;DR: The main purpose of as mentioned in this paper is to study the effect of various blends of an environment-friendly alternative fuel "methyl ester" on the performance of a heavy diesel engine, which was obtained from a chemical process: the transesterification of waste oils(frying oils) Tests were conducted on an engine test bench in accordance to DIN 2020 standards.
Abstract: The main purpose of this research is to study the effect of various blends of an environmen-tal friendly alternative fuel “methyl ester” on the performance of a heavy diesel engineThe biodiesel was obtained from a chemical process: the transesterification of waste oils(frying oils) Tests were conducted on an engine test bench in accordance to DIN 2020standards Results obtained demonstrate that the biodiesel gives very interesting ecologicaladvantages but engine performance was reduced slightly comparatively to those obtainedwith a pure diesel fuel We have noted about 5% decrease in power and torque and about2% in Nox emission for every 10% of biodiesel blend added comparatively to pure dieselHowever, the use of biodiesel has slightly increased specific fuel consumption (about 6%for every 10% of biodiesel blend added) [DOI: 101115/14006655]Keywords: biodiesel, blends, diesel engine, performance, emission
46 citations
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TL;DR: In this paper, the authors identified the most promising preventive and treatment approaches available in Africa and analyzed the incidence and fatality rates for the 10 most common and fatal cancers in 56 African countries grouped into five different regions (North, West, East, Central and South) over 16-years (2002-2018).
Abstract: Background Despite rising incidence and mortality rates in Africa, cancer has been given low priority in the research field and in healthcare services. Indeed, 57% of all new cancer cases around the world occur in low income countries exacerbated by lack of awareness, lack of preventive strategies, and increased life expectancies. Despite recent efforts devoted to cancer epidemiology, statistics on cancer rates in Africa are often dispersed across different registries. In this study our goal included identifying the most promising prevention and treatment approaches available in Africa. To do this, we collated and analyzed the incidence and fatality rates for the 10 most common and fatal cancers in 56 African countries grouped into 5 different regions (North, West, East, Central and South) over 16-years (2002-2018). We examined temporal and regional trends by investigating the most important risk factors associated to each cancer type. Data were analyzed by cancer type, African region, gender, measures of socioeconomic status and the availability of medical devices. Results We observed that Northern and Southern Africa were most similar in their cancer incidences and fatality rates compared to other African regions. The most prevalent cancers are breast, bladder and liver cancers in Northern Africa; prostate, lung and colorectal cancers in Southern Africa; and esophageal and cervical cancer in East Africa. In Southern Africa, fatality rates from prostate cancer and cervical cancer have increased. In addition, these three cancers are less fatal in Northern and Southern Africa compared to other regions, which correlates with the Human Development Index and the availability of medical devices. With the exception of thyroid cancer, all other cancers have higher incidences in males than females. Conclusion Our results show that the African continent suffers from a shortage of medical equipment, research resources and epidemiological expertise. While recognizing that risk factors are interconnected, we focused on risk factors more or less specific to each cancer type. This helps identify specific preventive and therapeutic options in Africa. We see a need for implementing more accurate preventive strategies to tackle this disease as many cases are likely preventable. Opportunities exist for vaccination programs for cervical and liver cancer, genetic testing and use of new targeted therapies for breast and prostate cancer, and positive changes in lifestyle for lung, colorectal and bladder cancers. Such recommendations should be tailored for the different African regions depending on their disease profiles and specific needs.
46 citations
Authors
Showing all 11809 results
Name | H-index | Papers | Citations |
---|---|---|---|
Walid Saad | 85 | 749 | 30499 |
Alexandre Mebazaa | 83 | 716 | 39967 |
Albert Y. Zomaya | 75 | 946 | 24637 |
Anis Larbi | 67 | 259 | 15984 |
Carmen Torres | 64 | 461 | 15416 |
Chedly Abdelly | 60 | 429 | 14181 |
Hans R. Kricheldorf | 57 | 825 | 18670 |
Mohamed Benbouzid | 51 | 492 | 12164 |
Enrique Monte | 48 | 118 | 7868 |
Fayçal Hentati | 47 | 153 | 10376 |
A. D. Roses | 45 | 120 | 24719 |
Laurent Nahon | 45 | 205 | 6252 |
Bessem Samet | 45 | 308 | 7151 |
Maxim Avdeev | 42 | 526 | 8673 |
Abdellatif Boudabous | 40 | 174 | 5605 |