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Search Results: 1 - 10 of 18557 matches for " Ali Mehrabi "
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An Adaptive Genetic Algorithm for Multiprocessor Task Assignment Problem with Limited Memory
Abbas Mehrabi,Saeed Mehrabi,Ali D. Mehrabi
Lecture Notes in Engineering and Computer Science , 2009,
Abstract:
Etiology of renal failure and peritoneal dialysis complications in Isfahan  [PDF]
Soheila Mojdeh, Shirin Karimi, Ali Mehrabi, Soheila Bakhtiari
Health (Health) , 2013, DOI: 10.4236/health.2013.510229
Abstract:

Introduction: Worldwide specific diseases are jeopardizing people’s health in the world as well as in Iran. Chronic renal failure as a developed and irreversible failure is usually progressive. End Stage Renal Disease (ESRD) is a situation when renal function is not sufficient to preserve one’s life leading to acute uremia resulting in dialysis and/or kidney transplantation for the patients. Although dialysis methods bring about complications for the patients, peritoneal dialysis is relatively cost-effective and more convenient to survive. The present study aimed to investigate (the) Etiologic factor of renal failure and imposed complications of peritoneal dialysis in the patients of Isfahan Alzahra hospital. Materials and Methods: It was a cross-sectional descriptive study conducted on 67 patients in Isfahan Peritoneal Dialysis Center. The data from the patients were collected through a two-section questionnaire whose first section was allocated to demographic information and the second part was related to the disease and complications of peritoneal dialysis. The collected data were analyzed by SPSS version 18. Results: The findings showed that there were 39 (58%) males and 28 (42%) females. Mean age of the subjects was 48 (18.8) years old. Regarding marital status, 65% were married and 35% were single. Considering complications, 28 subjects (53.5%) had infectious complications while 24 subjects (46.2%) had non-infectious complications. The highest frequency in etiologic factor of renal failure was diabetes mellitus in 29 subjects (43.9%) and the lowest for polycystic kidney in 2 subjects (3%); in addition, hypertension was observed in 51 subjects (77.3%). Discussion: The most frequent and important complication of peritoneal dialysis catheters is infection, whic

General Versus Spinal Anesthesia in Percutaneous Nephrolithotomy
Sadrollah Mehrabi,Ali MousaviZadeh,Mehdi AkbartabarToori,Farhad Mehrabi
Urology Journal , 2013,
Abstract: PURPOSE:To compare efficacy and complications of spinal anesthesia versus general anesthesia in percutaneous nephrolithotomy (PCNL).MATERIALS AND METHODS:In a prospective randomized study, 110 patients were randomly assigned into two groups for PCNL; group 1 (n = 52) underwent general anesthesia and group 2 (n = 58) received spinal anesthesia. In group 1, PCNL was performed using standard technique under general anesthesia. In group 2, spinal anesthesia was done by injecting bupivacaine and fentanyl in spinal space L4 in sitting position. Thereafter, a urethral catheter was placed in lithotomy position, head of the bed was tilted down for 5 to 10 minutes, and the level of anesthesia was checked. Then, PCNL was done by standard technique. Complications were recorded and analyzed by SPSS software using Chi-Square and Student’s t tests.RESULTS: Mean stone size in groups 1 and 2 was 34.2 ± 9.8 mm and 31.3 ± 7.9 mm, respectively. Intra-operative hypotension and postoperative headache and low back pain were more in spinal group than the general group with a significant difference (P< .05). No neurologic complication was observed in both groups. Need to narcotic medications on the day of operation in groups 1 and 2 was 12.4 ± 3.1 mg and 7.8 ± 2.3 mg of morphine sulphate, respectively (P = .03). The cost of anesthetic drugs was 23±3.7 US $ and 4.5 ± 1.3 US $ in groups 1 and 2, respectively (P = .001).CONCLUSION:Spinal anesthesia with combined bupivacaine and fentanyl is a safe, effective, and cost-effective method for performing PCNL in adult patients.
A (7/2)-Approximation Algorithm for Guarding Orthogonal Art Galleries with Sliding Cameras
Stephane Durocher,Omrit Filtser,Robert Fraser,Ali Mehrabi,Saeed Mehrabi
Computer Science , 2013,
Abstract: Consider a sliding camera that travels back and forth along an orthogonal line segment $s$ inside an orthogonal polygon $P$ with $n$ vertices. The camera can see a point $p$ inside $P$ if and only if there exists a line segment containing $p$ that crosses $s$ at a right angle and is completely contained in $P$. In the minimum sliding cameras (MSC) problem, the objective is to guard $P$ with the minimum number of sliding cameras. In this paper, we give an $O(n^{5/2})$-time $(7/2)$-approximation algorithm to the MSC problem on any simple orthogonal polygon with $n$ vertices, answering a question posed by Katz and Morgenstern (2011). To the best of our knowledge, this is the first constant-factor approximation algorithm for this problem.
A comparative study of obsessive- rumination component on obsessive-compulsive and depressive patients
Masomeh Khosravi,Hossein Ali Mehrabi,Miadeh Azizimoghadam
Koomesh , 2008,
Abstract: Introduction: Obsessive rumination is a component which plays an important role in depressionand obsessive- compulsive states. It leads to dept and continue others psychological disorders. In thisstudy, rate of obsessive rumination on depressive and obsessive- compulsive’s patients was studied.Materials and Methods: This is a causal-comparative study which was performed on 60 patient and60 normal subjects that randomly were selected. 30 patients with depression (15 women, 15 men), and30 obsessive- compulsive patients (15 women, 15 men) from clinics and psychiatric centers of Tehranand Semnan cities were selected randomly. 60 normal subjects (30 women, 30 men) who werematched in age, sex and job, randomly selected from the same places. Depression and Obsessive -compulsive questioners were selected as tools and used for collecting data. Multivariate analyzevariance was used for analyzing data.Results: It was found significant differences obsessive in rumination between three groups (normal,obsessive – compulsive and depression).Components of isolation and tendency to explanatory indepressive patients were more than normal subjects. Rate of repeating feeling about problems,worrying about unsolved problems, and also self-criticizing was significantly more in depressive andobsessive patients than normal subjects.Conclusion: These findings indicated that obsessive-rumination factor plays an important role indepressive and obsessive–compulsive. Thus, obsessive-rumination treatment is needed base onpsychotherapy programs, modification of inefficiency attitudes, teaching thought control and learningproblem solving skills.
Ruptured Giant Hepatic Hemangioma: Report of A Case
Ali Jangjoo,Mostafa Mehrabi Bahar,Mohsen Aliakbarian
Acta Medica Iranica , 2010,
Abstract: "nHemangiomas are the most common benign liver masses with a frequency of 0.4-7.3% at autopsy. They are usually discovered incidentally and a few require surgery. Spontaneous or traumatic ruptures are among indications of surgery for hemangiomas. We report a case of giant hepatic hemangioma presenting as hemoperitoneum following use of the slimming belt that underwent an emergent laparotomy. Abdominal exploration revealed that both right and left lobes of the liver were involved with giant hemangiomas. The liver was compressed by tightly packing laparotomy pads. After the operation, the patient was admitted to the surgical intensive care unit. Two days later, a second surgery was performed to remove the laparotomy pads. On the 6th day, the patient was discharged. One month later, to shrink the tumor, percutaneous transarterial embolization of the hepatic artery was performed.
Studying the Effect of Leader’s Participative Behaviors on Employee’s Effectiveness Perception and Performance (Kohdasht Municipality as Case Study)
Javad Mehrabi,Nematollah Safaei,Ali Kazemi
International Journal of Academic Research in Business and Social Sciences , 2013,
Abstract: This study was aimed to study the effect of leader’s participative behaviors on employee’s perception of effectiveness and performance. In order to this, the variables of this study are participative behaviors (participative management), employee’s performance, and effectiveness perception. The last variable is multi-dimensional that could divide into three dimensions including leader effectiveness, collective effectiveness, and self-effectiveness. This study is descriptive-survey from methodology perspective and is practical from goal perspective. The statistical population of this study is 105 employees of Kohdasht municipality. In order to determine sample size, Morgan table used and 83 employees were chosen as sample members. A self-administrated questionnaire developed to gather data with Likert 5-points scale. This includes 36 items about participative behaviors, leader’s effectiveness, collective effectiveness, self-effectiveness, and employee’s performance. In order to examine reliability of the questionnaire, Cronbach’s Alpha was used. The coefficient of this test was 0.91 for this questionnaire and shows that the questionnaire has good reliability and hence reliability of the questionnaire confirmed. Also the questionnaire correct and modified by some of management professors and after conducting a primary sampling, final version of the questionnaire developed. Therefore, validity of the questionnaire confirmed through content validity. In order to analyze data and concluding results, descriptive statistic and inferential statists were used. Regressions test and Pearson correlation test is the main statistical test that used for this purpose. The results of this study indicate that there are significant relationships between leader’s participative behavior and employee’s performance. Also the results show that significant there are significant relationships between perception of collective effectiveness and employee’s performance. Also the results show that there are significant relationships between perception of self-effectiveness and employee’s performance. Finally some empirical suggestions offered for managers and officials of Kohdasht municipality.
Seizure recurrence after a first unprovoked seizure:With and without treatment
Mohammad Reza Najafi,Ali Mehrabi,Farideh Najafi
Journal of Research in Medical Sciences , 2008,
Abstract: BACKGROUND: Most of the studies have shown that approximately one third of patients with single seizure will experience a second one. Data regarding seizure-free survival time and recurrence rate vary widely. We investigated the likelihood of a second attack and seizure-free survival time with and without early treatment in our epileptic patients. METHODS: Patients of the first unprovoked seizures were recruited between 2000-2005 years. They were randomized into two groups: one treated with carbamazepine and the other was not treated. After obtaining a written consent, all patients were followed up for a second seizure for a period ranging from 12 to 36 (19.1 ± 5) months. RESULTS: A total number of 150 patients were enrolled in this study, of which 13 patients were lost to follow up. The remaining patients (71 males and 66 females) were followed up during 5 years. They were randomized into two groups: treatment (50 patients) and non-treatment (87 patients); 30.2% of all patients were without relapsing, of which 48.9% were on treatment (case) and 19.5% did not receive any treatment (the control group). The mean seizure-free survival times were 6 months and 3.8 months in the treated and non-treated patients, respectively (P = 0.017). CONCLUSIONS: We found strong correlation between relapse and treatment started after the first attack (P < 0.05); i.e., the patients who received treatment in their first attack may be at lower risk of relapsing. KEY WORDS: Unprovoked seizure, first seizure, recurrence, treatment, survival time.
Extracranial cerebral arterial atherosclerosis in Iranian patients suffering ischemic strokes
Sayed Ali Mousavi,Majid Ghasemi,Tahereh Hoseini,Ali Mehrabi
Journal of Research in Medical Sciences , 2006,
Abstract: BACKGROUND: To determine the distribution and severity of extracranial carotid arterial atherosclerosis in Iranian patients with ischemic stroke. METHODS: 328 patients with ischemic stroke were included in this study. Doppler ultrasound was used for evaluation of atherosclerosis in extracranial carotid arteries. The NASCET criteria were used to measure carotid stenosis. RESULTS: Ninety of 328 patients (27.4%) were found to have atherosclerotic plaques; 40 of these patients were women and 50 were men. Sixty-eight patients (20.7%) had artery stenosis <50%, 13 patients (3.95%) had 50-70 % artery stenosis and 6 (1.8%) had >70% artery stenosis. CONCLUSIONS: Extracranial atherosclerosis is not rare in Iranian patients with ischemic stroke, but most carotid artery lesions were plaques with <50% stenosis. KEY WORDS: Atherosclerosis, ischemic stroke, carotid stenosis.
Various Techniques for the Surgical Treatment of Common Bile Duct Stones: A Meta Review
Abolfazl Shojaiefard,Majid Esmaeilzadeh,Ali Ghafouri,Arianeb Mehrabi
Gastroenterology Research and Practice , 2009, DOI: 10.1155/2009/840208
Abstract: Common bile duct stones (CBDSs) may occur in up to 3%–14.7% of all patients for whom cholecystectomy is preformed. Patients presenting with CBDS have symptoms including: biliary colic, jaundice, cholangitis, pancreatitis or may be asymptomatic. It is important to distinguish between primary and secondary stones, because the treatment approach varies. Stones found before, during, and after cholecystectomy had also differing treatments. Different methods have been used for the treatment of CBDS but the suitable therapy depends on conditions such as patient' satisfaction, number and size of stones, and the surgeons experience in laparoscopy. Endoscopic retrograde cholangiopancreatography with or without endoscopic biliary sphincterotomy, laparoscopic CBD exploration (transcystic or transcholedochal), or laparotomy with CBD exploration (by T-tube, C-tube insertion, or primary closure) are the most commonly used methods managing CBDS. We will review the pathophysiology of CBDS, diagnosis, and different techniques of treatment with especial focus on the various surgical modalities.
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