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Search Results: 1 - 10 of 461837 matches for " Hariri A "
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Experimental Study of Longitudinal and Circumferential External Defect in Pressured Cylindrical Shells  [PDF]
A. Elhakimi, A. Chamat, A. Touache, A. Daya, S. Hariri
World Journal of Mechanics (WJM) , 2015, DOI: 10.4236/wjm.2015.56011
Abstract: Two cylindrical vessels under internal pressure are used for this work in order to study the influence of the position and size of defects on their elastic and elastoplastic behavior. One contains two external longitudinal semi-elliptic defects of different dimensions realized diametrically opposed. The other contains the same defects but is circumferential. These defects are carried out by elect-erosion. Strain gauges are placed in the neighborhood of the defects of which the purpose is to obtain the strain distribution. This work also allows the comparison between two defects of different dimensions, which are of the same shape or different shapes. These defects are longitudinal and circumferential semi-elliptical. The position of these defects relative to the inner radius of a cylindrical pressure vessel is considered. The deformations results are discussed.
Adoption of Innovation within Universities: Proposing and Testing an Initial Model  [PDF]
Abdulrahman Hariri, Paul Roberts
Creative Education (CE) , 2015, DOI: 10.4236/ce.2015.62017
Abstract: This study discusses the need for improvement and innovation in universities so they can effectively serve students and stay ahead in competition. Many technologies and innovations are already being used in universities. However, in order to diffuse or spread technologies or innovations effectively, it is important to understand the reasons leading to the adoption of technologies and innovations in universities. Based on a number of established theories and models on innovation and technology adoption and acceptance, this study proposes a theoretical model that helps explain the factors responsible for innovation adoption within universities. Measures for the study were adopted from previous studies, and an online questionnaire was used. Exploratory and confirmatory factor analyses were used to test and better understand the underlying structure of the proposed model. Reliability and validity of the proposed model were also examined. The initially proposed model seems to help in explaining the adoption of innovations within universities and is of value to researchers when investigating adoption within universities.
Water Hammer Modelling and Simulation by GIS
K. Hariri Asli,A. K. Haghi,H. Hariri Asli,E. Sabermaash Eshghi
Modelling and Simulation in Engineering , 2012, DOI: 10.1155/2012/704163
Abstract: This work defined an Eulerian-based computational model compared with regression of the relationship between the dependent and independent variables for water hammer surge wave in transmission pipeline. The work also mentioned control of Unaccounted-for-Water (UFW) based on the Geography Information System (GIS) for water transmission pipeline. The experimental results of laboratory model and the field test results showed the validity of prediction achieved by computational model.
Impact of Post Hepatitis C Chronic Liver Disease and Hepatocellular Carcinoma on Health Related Quality of Life  [PDF]
Somaia M. Ebeid, Safaa H. Ali, Heba Y. Kamel, Ahmed A. Elbaz, Hazem M. El-Hariri
Advances in Aging Research (AAR) , 2015, DOI: 10.4236/aar.2015.46019
Abstract: Background: Post hepatitis C virus chronic liver disease (CLD) is prevalent among the Egyptian population with a bad impact upon their quality of life (QOL). Hepatocellular carcinoma (HCC) is one of the long term and fatal complications of CLD and it also has its negative impact on patient’s quality of life. Aim: To assess impact of CLD and HCC on the quality of life of group of hospitalized elderly patients. Methodology: Ninety elderly patients were divided into three groups: 30 elderly with post hepatitis C virus CLD, 30 elderly with HCC and 30 others free of liver disease as control group (Cn), all were recruited from the in-patient ward and the outpatient clinic of the Geriatric Department, Ain-Shams University Hospital. After giving consent, comprehensive geriatric assessment was done with assessment of their quality of life by using the Short Form-36 health survey (SF-36). Investigations including liver enzymes, serum albumin, serum bilirubin and abdominal ultrasound were done. Results: All QOL domains were the highest among control group, followed by HCC group and the least among CLD group. The differences were statistically significant in most subscales and total score [Mean of Cn = 81.9 ± 12.4, Mean of CLD = 47.5 ± 21.9, Mean of HCC = 62.3 ± 16.1; P Cn/CLD ≤ 0.001, P Cn/HCC ≤ 0.001, P CLD/HCC = 0.004]. Albumin was the only biochemical marker correlated positively with total SF score and two subscales (PF and EF) [r = 0.408; P = 0.025]. Conclusion & Recommendation: Our study showed a decrease in the QOL of Egyptian post hepatitis C virus CLD and HCC patients compared with Egyptian population norms. The results showed that CLD were more affected than HCC patients. This had a particularly serious negative impact on their life. The findings indicate a need for updated counseling and educational materials designed to provide adequate information and consistent healthcare service to this patient setting.
Pars plana vitrectomy and internal limiting membrane peeling for macular edema secondary to retinal vein occlusion
Baharivand N, Hariri A, Javadzadeh A, Heidari E, Sadegi K
Clinical Ophthalmology , 2011, DOI: http://dx.doi.org/10.2147/OPTH.S23164
Abstract: rs plana vitrectomy and internal limiting membrane peeling for macular edema secondary to retinal vein occlusion Original Research (3118) Total Article Views Authors: Baharivand N, Hariri A, Javadzadeh A, Heidari E, Sadegi K Published Date August 2011 Volume 2011:5 Pages 1089 - 1093 DOI: http://dx.doi.org/10.2147/OPTH.S23164 Nader Baharivand, Amirhossein Hariri, Alireza Javadzadeh, Ebadollah Heidari, Karim Sadegi Nikookari Eye Hospital, Tabriz University of Medical Sciences, Tabriz, Iran Purpose: To evaluate the effects of vitrectomy and internal limiting membrane peeling for treatment of macular edema secondary to retinal vein occlusion (RVO). Methods: Nine cases of visual loss due to macular edema caused by central retinal vein occlusion or branch retinal vein occlusion underwent pars plana vitrectomy with removal of the preretinal hyaloid, peeling of the internal limiting membrane stained with indocyanine green dye, air–fluid exchange, and postoperative prone positioning. Best-corrected visual acuity (BCVA) and central foveal thickness by optical coherence tomography were measured pre- and postoperatively then compared to assess the outcome of surgery. Results: In all cases intraretinal blood and retinal thickening diminished within 2 months of surgery. Visual acuity improved in all of the central retinal vein occlusion cases and 3/6 branch retinal vein occlusion cases. The decrease in macular thickness was statistically significant (mean postoperative macular thickness 361 ± 61.1 versus mean preoperative macular thickness 563.9 ± 90.0, P = 0.001, t-test). The improvement in BCVA was not statistically significant (mean preoperative BCVA in LogMAR 1.23 ± 0.29 versus mean postoperative BCVA in LogMAR 1.06 ± 0.49, P = 0.09, t-test). Conclusion: In eyes with macular edema secondary to RVO, pars plana vitrectomy with internal limiting membrane peeling can resolve macular edema, but the improvement in BCVA was not statistically significant in this study.
ASSESSING MUTAGENICITY OF THE DRUG MDMA (ECSTASY) AVAILABLE IN IRAN USING AMES BIOASSAY
M Hariri,A Jalali,A Farajzadeh,E Khajeamiri
Jundishapur Journal of Natural Pharmaceutical Products , 2010,
Abstract: An increase in incidence of illegal use of tablets containing 3, 4-methylene dioxy- metamphetamine (MDMA), has recently become a widespread social problem. MDMA most commonly known today by the street name ecstasy (often abbreviated XTC), is a semi-synthetic member of the amphetamine class of psychoactive drugs. The aim of this study was to investigate the genotoxic effects of MDMA on the basis of the results of an in vitro Ames test. In the first step, a sensitive method of gas chromatography-mass spectrometry (GC-MS) was used for simultaneous quantitation of MDMA in the tablets. The Ames test uses one of the strains of the bacterium Salmonella typhymurium (TA100) that carries mutations in genes involved in histidine synthesis, so that it requires histidine for growth. The variable being tested is the mutagen's ability to cause a reversion, making bacteria grows on a histidine-free medium. When the cultures are exposed to a mutagen, in the absence and presence of a rat liver metabolizing system, some of the bacteria undergo genetic changes due to chemical interactions resulting in reversion of the bacteria to a non-histidine requiring state. The reverted bacteria will then grow in the absence of exogenous histidine. In this test, we used MDMA as a possible mutagen. No increase in bacteria growth in the histidine-free medium was observed. So, no MDMA genotoxicity was observed in this method.
A Bacteriological Study of Meningitis in Pediatric Patients in Ahwaz,lran
C. Kimberlin,A.Hariri,L.Hakkak,A
Acta Medica Iranica , 1980,
Abstract: Of 164 cerebral spinal fl uid s amples received, 100 or 60 .9% were f rom pati ent s wi t h s uspected bacteria l meningi t is . The positive cul t ure r ate f or a l 1 the samples was 24' or 40% if on l y t he CSF sample s from menigi t is patients are included. The most common caus e of menigitis in the newborn wa s the gram negative b a c i l l i . Etiological agents i n i nfants from two month s t o three yea r s i ncluded Hemophilus.
Sampling Method for Welding Fumes and Toxic Gases in Malaysian Small and Medium Enterprises (SMEs)
Azian Hariri,M. Z. M. Yusof,A. M. Leman
Energy and Environment Research , 2012, DOI: 10.5539/eer.v2n2p13
Abstract: In 2009 there were 28,840 small and medium enterprises (SMEs) in Malaysia which represented 94.2 % of the total establishments in the manufacturing sector. Job tasks in manufacturing sectors above all involve welding processes. The issues in SMEs mainly resolve around poor working conditions contributing to worker’s safety and health problem. Welding fumes and toxic gas assessment in SMEs welding workplace is essential in order to ensure the minimum level of exposure is maintained as required by the prevailing standards. This paper outlines the methodology for fumes and toxic gas sampling by taking into account analytical method currently available for analysis in the government accredited laboratory. The proposed methods are divided into two; the pilot test and the actual measurement. Standardize sampling method using sampling pump along with direct reading measurement are consider in both the pilot test and actual measurement. The proposed sampling method hopefully will benefit researcher, stakeholders or SMEs by giving guidance on the suitable method for welding workplace assessment.
Identification and low-complexity regime-switching insulin control of type I diabetic patients  [PDF]
Ali Hariri, Le Yi Wang
Journal of Biomedical Science and Engineering (JBiSE) , 2011, DOI: 10.4236/jbise.2011.44040
Abstract: This paper studies benefits of using simplified re-gime-switching adaptive control strategies in improving performance of insulin control for Type I diabetic patients. Typical dynamic models of glucose levels in diabetic patients are nonlinear. Using a linear time invariant controller based on an operating condition is a common method to simplify control design. On the other hand, adaptive control can potentially improve system performance, but it increases control complexity and may create further stability issues. This paper investigates patient models and presents a simplified switching control scheme using PID controllers. By comparing different switching schemes, it shows that switched PID controllers can improve performance, but frequent switching of controllers is unnecessary. These findings lead to a control strategy that utilizes only a small number of PID controllers in this scheduled adaptation strategy.
A Review of Literature: A Gender-based Study of Pronunciation Accuracy
Mahsa Hariri
Research Journal of Applied Sciences, Engineering and Technology , 2012,
Abstract: This study as a review of related literature, aims to investigate the role of the gender on the pronunciation accuracy. We present a description of the pronunciation accuracy and the previous studies in this realm are reviewed and the effect of gender on it is noted. For nonnative speakers who intend to learn English language, the ability to speak fluently and to have pronunciation fluency is one of their necessities. It is interesting for researchers or others who participating in English language learning programs to know the differences between two genders in this field. The historical background of the researches in this realm shows no considerable difference between them except that producing accurate and clear consonants by females are more than males but it cannot confirm a complete superiority of females in pronunciation accuracy. So, according to these studies, there is no significant difference between learning in men and women and there is no need to design different programs for their language learning programs.
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