Saudi Arabia
Saudi Arabia

Qassim University is a public university in the Al-Qassim Province of Saudi Arabia. It was established in 2004 jointly between King Saud University and Imam Muhammad ibn Saud Islamic University, each of which used it as its Qassim campus. Subsequently, its constituent colleges became a part of Qassim University. The main campus of Qassim University covers about eight square kilometers and is situated between Buraydah and Unaizah in the heart of the region. There are campuses in different cities in Al-Qassim Province. During 2008, enrollment at Qassim University was 40,000 students. Faculty and staff totaled 3,500.Colleges at Qassim University include Sharia College; the College of Arabic Language and Social science; the College of Agricultural and Veterinary science; a College of Economics; a College of Science; a College of Medicine; a College of Engineering; a College of Computer Science; a College of Applied Medical science; a College of Dentistry and a College of Pharmacy.There is also a Science College in Al-Zilfi, community colleges and women's colleges. Wikipedia.

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Tanvir Parvez M.,Qassim University | Mahmoud S.A.,King Fahd University of Petroleum and Minerals
Pattern Recognition | Year: 2013

In this paper, we present research results on off-line Arabic handwriting recognition using structural techniques. Statistical methods have been more common in the reported research on Arabic handwriting recognition. Structural methods have remained largely unexplored in this regard. However, both statistical and structural techniques can be effectively integrated in multi-classifier based systems. This paper presents, to our knowledge, the first integrated offline Arabic handwritten text recognition system based on structural techniques. In implementing the system, several novel algorithms and techniques for structural recognition of Arabic handwriting are introduced. An Arabic text line is segmented into words/sub-words and dots are extracted. An adaptive slant correction algorithm that is able to correct the different slant angles of the different components of a text line is presented. A novel segmentation algorithm, which is integrated into the recognition phase, is designed based on the nature of Arabic writing and utilizes a polygonal approximation algorithm. This is followed by Arabic character modeling by 'fuzzy' polygons and later recognized using a novel fuzzy polygon matching algorithm. Dynamic programming is used to select best hypotheses of a sequence of recognized characters for each word/sub-word. In addition, several other key ideas, namely prototype selection using set-medians, lexicon reduction using dot-descriptors etc. are utilized to design a robust handwriting recognition system. Results are reported on the benchmarking IfN/ENIT database of Tunisian city names which indicate the robustness and the effectiveness of our system. The recognition rates are comparable to multi-classifier implementations and better than single classifier systems. © 2012 Elsevier Ltd All rights reserved.

Parvez M.T.,Qassim University | Mahmoud S.A.,King Fahd University of Petroleum and Minerals
ACM Computing Surveys | Year: 2013

Research in offline Arabic handwriting recognition has increased considerably in the past few years. This is evident from the numerous research results published recently in major journals and conferences in the area of handwriting recognition. Features and classifications techniques utilized in recent research work have diversified noticeably compared to the past. Moreover, more efforts have been diverted, in last few years, to construct different databases for Arabic handwriting recognition. This article provides a comprehensive survey of recent developments in Arabic handwriting recognition. The article starts with a summary of the characteristics of Arabic text, followed by a general model for an Arabic text recognition system. Then the used databases for Arabic text recognition are discussed. Research works on preprocessing phase, like text representation, baseline detection, line, word, character, and subcharacter segmentation algorithms, are presented. Different feature extraction techniques used in Arabic handwriting recognition are identified and discussed. Different classification approaches, like HMM, ANN, SVM, k-NN, syntactical methods, etc., are discussed in the context of Arabic handwriting recognition. Works on Arabic lexicon construction and spell checking are presented in the postprocessing phase. Several summary tables of published research work are provided for used Arabic text databases and reported results on Arabic character, word, numerals, and text recognition. These tables summarize the features, classifiers, data, and reported recognition accuracy for each technique. Finally, we discuss some future research directions in Arabic handwriting recognition. © 2013 ACM.

Alzolibani A.A.,Qassim University
Acta Dermatovenerologica Alpina, Pannonica et Adriatica | Year: 2011

Alopecia areata (AA) is a common, chronic, inflammatory disease resulting in an unpredictable, non-scarring form of hair loss. It affects almost 0.1% of the general population. Although the cause of AA is poorly understood, it is hypothesized to have an autoimmune etiology. Supporting this theory is the fact that activated CD4 and CD8 T lymphocytes have been found in characteristic perifollicular and intrafollicular inflammatory infiltrates of affected individuals' anagen hair follicles. AA provides an excellent opportunity to study the role of immunogenetics. In fact, various genes that have a role in regulating immunity have also been associated with susceptibility to AA. Several reports have indicated a significant association between AA and certain human leukocyte antigens (HLA) genes such as HLA-DRB1*0401 and DQB1*. This review provides an overview of current knowledge about the molecular genetics of AA. The literature review has shown overlapping gene patterns suggestive of common pathogenic mechanisms. However, many questions remain unanswered because data about local gene expression patterns in affected tissues are still scarce.

Alghasham A.A.,Qassim University
Medical Teacher | Year: 2012

Introduction: Since problem-based learning (PBL) sessions require a combination of active discussion, group interaction, and inductive and reflective thinking, students with different learning styles can be expected to perform differently in the PBL sessions. Methodology: Using "Learning Style Inventory Questionnaire," students were divided into separate active and reflective learner groups. Tutors were asked to observe and assess the students' behavioral performance during the PBL sessions for a period of 5 weeks. A questionnaire of 24 items was developed to assess students' behavioral performance in PBL sessions. Results: Active students tended to use multiple activities to obtain the needed information were more adjusted to the group norms and regulation and more skillful in using reasoning and problem-solving skills and in participation in discussion. On the other hand, reflective students used independent study more, listened actively and carefully to others and used previously acquired information in the discussion more frequently. Formative assessment quizzes did not indicate better performance of either group. There were no significant gender differences in PBL behavioral performance or quizzes' scores. Conclusion: Active and reflective learners differ in PBL class behavioral performance but not in the formative assessment. We recommend that students should be informed about their learning style and that they should learn strategies to compensate for any lacks in PBL sessions through self-study. Also, educational planners should ensure an adequate mix of students with different learning styles in the PBL groups to achieve PBL desired objectives. © 2012 Informa UK Ltd. All rights reserved.

Gasim G.I.,Qassim University
Arab Journal of Gastroenterology | Year: 2013

The epidemiology of viral hepatitis is of great importance for planning and managing health provision for all the countries in the Arab world. However, data on viral hepatitis are not readily available in a large percentage of Arab countries. Hepatitis B virus (HBV) is considered to be one of the most important causes of chronic hepatitis, cirrhosis and hepatocellular carcinoma. A systematic electronic search of published literature was conducted to extract data on epidemiology and risk factors for the analysis of HBV infection among the countries in the Arab world.The prevalence of chronic HBV infection was found to be decreasing in some Arab countries although it was still unacceptably high. This was particularly evident in the Arabian Gulf region, in Lebanon, Egypt and Libya. The age-specific prevalence varied from country to country with decline in prevalence being noted among children in the Gulf States and among Libyan women. These declines in prevalence are most likely to be related to the Expanded Immunization Programme.The alarmingly high prevalence of chronically infected patients in some areas and the widespread differences in HBV prevalence between Arab nations may be explained by the variation in risk factors involved. This situation calls for targeted approaches to tackle HBV-related mortality and morbidity. Precise HBV infection prevalence data are needed at the national and the sub-national level to estimate the disease burden, guide health intervention programmes and evaluate vaccine efficiency. © 2013 Arab Journal of Gastroenterology.

Mati Y.,Qassim University
Computers and Industrial Engineering | Year: 2010

This paper addresses the makespan minimization in a job-shop environment where the machines are not available during the whole planning horizon. The disjunctive graph model is used to represent the schedules and the concept of blocks is generalized to include the unavailability periods of machines. To solve the problem, we develop a taboo thresholding heuristic that uses a new block-based neighborhood function. Some sufficient conditions to eliminate the evaluation of non-improving moves are proposed. Experiments performed on existing problem instances of the literature show the efficiency of the proposed heuristic. © 2010 Elsevier Ltd. All rights reserved.

Al Shobaili H.A.,Qassim University
Pediatric Dermatology | Year: 2010

Atopic dermatitis is a common childhood disease that impairs quality of life. The study aimed to clarify the impact of childhood atopic dermatitis on family life and to correlate severity of atopic dermatitis with family life. A cross-sectional survey was conducted at Qassim Region of Saudi Arabia over a period of 4 months extending from April to July 2009. The parents of children with atopic dermatitis were asked through a validated "Dermatitis Family Impact Questionnaire" about the impact of the disease on their life. For each questionnaire, a total score of 0 to 5 is considered as normal quality of life, 6 to 10 as low, 11 to 20 as moderate and >20 as high alteration in quality of life. The severity of the disease was evaluated using the SCORAD index. A total of 447 children with atopic dermatitis were included in the study. Their mean age was 65.9 months. Males constituted 57% of the patients. The mean score for quality of life in affected families was 13.9 (minimum 2, maximum 25). Based on our suggested classification, only 15 (3.4%) had normal quality of life, 104 (23.3%) were mildly affected, 297 (66.4%) were moderately affected, while 31 (6.9%) reported severe alternation in their quality of life. Sleep, monthly expenditure, and food preparation were the activities showing the highest level of disturbance. The disturbance in quality of life was significantly correlated to increasing severity of the disease. The study has emphasized the importance of investigating the quality of life of atopic dermatitis families. A simple questionnaire is a useful guide for appropriate management of the disease. © 2010 Wiley Periodicals, Inc.

Objective: The aim of this study was to investigate the possible effects of electromagnetic radiation from conventional cellular phone use on the oxidant and antioxidant status in rat blood and testicular tissue and determine the possible protective role of vitamins C and E in preventing the detrimental effects of electromagnetic radiation on the testes. Materials and Methods: The treatment groups were exposed to an electromagnetic field, electromagnetic field plus vitamin C (40 mg/kg/day) or electromagnetic field plus vitamin E (2.7 mg/kg/day). All groups were exposed to the same electromagnetic frequency for 15, 30, and 60 min daily for two weeks. Results: There was a significant increase in the diameter of the seminiferous tubules with a disorganized seminiferous tubule sperm cycle interruption in the electromagnetism-exposed group. The serum and testicular tissue conjugated diene, lipid hydroperoxide, and catalase activities increased 3-fold, whereas the total serum and testicular tissue glutathione and glutathione peroxidase levels decreased 3-5 fold in the electromagnetism-exposed animals. Conclusion: Our results indicate that the adverse effect of the generated electromagnetic frequency had a negative impact on testicular architecture and enzymatic activity. This finding also indicated the possible role of vitamins C and E in mitigating the oxidative stress imposed on the testes and restoring normality to the testes. © 2012 CLINICS.

The structural, electronic and magnetic properties of electron-doped double perovskite Ba2-xLaxCrMoO 6 (x = 0, 1, 2) have been investigated by means of full potential linear muffin-tin orbital within the atomic plane wave (LMTO-PLW) method. The calculations were performed using the correlated local-spin-density approximation (LSDA+U). It found that the symmetry decreases from cubic Fm-3m (x = 0, 1) to tetragonal I4/m (x = 2). The DOS results show that the ground states of Ba2-xLaxCrMoO6 are half-metallic-ferrimagnetic (HM-FIM) for (x = 0, 1). The electrons occupy Mo (4d) in pdd-π coupling, Cr (t2g)↑-O (2pπ)-Mo (t2g)↓, have organized the HM-FIM states. In addition, with increasing of La3+ content the magnetic moment of Mo (4d) increases distinctly, and the injected electron occupies chiefly the Mo (4d)↓ bands. Electron-doping is found to be modified the order on Cr (3d)-Mo (4d) sites which cause a reduction of the total magnetic moment. © 2013 Elsevier B.V. All rights reserved.

Alghasham A.,Qassim University | Rasheed Z.,Qassim University
Autoimmunity | Year: 2014

Recent therapeutic advancements in understanding of molecular and cellular mechanisms of rheumatoid arthritis (RA) have highlighted the strategies that aim to inhibit the harmful effects of up-regulated cytokines or other inflammatory mediators and to inhibit their associated signaling events. The utility of cytokine as therapeutic targets in RA has been unequivocally demonstrated by the success of tumor necrosis factor (TNF)-α blockade in clinical practice. Partial and non-responses to TNF-α blocking agents, however, together with the increasing clinical drive to remission induction, requires that further therapeutic targets be identified. Numerous proinflammatory mediators with their associated cell signaling events have now been demonstrated in RA, including interleukin (IL)-1 and IL-12 superfamilies. Continued efforts are ongoing to target IL-6, IL-15 and IL-17 in clinical trials with promising data emerging. In the present review, we focus on IL-7, IL-18, IL-32 and IL-10 family of cytokines (IL-19, IL-20 and IL-22) as they are implicated in contributing to the pathogenesis of RA, which could be targeted and offer new therapeutic options for RA therapy. Recent evidences also suggest that multiligand receptor for advanced glycation end products (RAGE), several adipokines and various components of immune system play a critical role in the pathophysiology of RA; therefore we have also highlighted them as therapeutic targets for RA therapy. Components of subcellular pathways, involve in nuclear transcription factor (NF)-κB, mitogen-activated protein kinases (MAPKs) and the Janus kinase-signal transducer and activator of transcription (JAK-STAT) pathway have also been discussed and offer several novel potential therapeutic opportunities for RA. © 2014 Informa UK Ltd. All rights reserved.

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