farzad amiri - Academia.edu (original) (raw)

Papers by farzad amiri

Research paper thumbnail of Optimization of Facility Location-Allocation Model for Base Tranceiver Station Antenna Establishment Based on Genetic Al-gorithm Considering Network Effectiveness Criteria (Case Study North of Kermanshah)

Scientia Iranica

The location of the base tranceiver station (BTS) antennas plays important role in the proper ser... more The location of the base tranceiver station (BTS) antennas plays important role in the proper service and coverage of the mobile connection in each region. Proper location of these antennas is a major challenge for operators in each country, as in addition to maximum network coverage, service costs must also be acceptable and competitive. This means that in busy areas, in order to provide better service, the antennas must be greater and closer to each other. In general, the location problem is a type of optimization problem that aims to select a subset of the candidate locations to create the facilities that provide the best service at the lowest cost. To solve such problems in a reasonable time, we can use meta-heuristic algorithms to find solutions that are close to the optimal solution. Accordingly, this paper attempts to apply the genetic algorithm (GA) to find a suitable solution for finding BTS mobile antennas in north Kermanshah. To this end, a GA model is proposed that improves the location coordinates of the current BTS antennas extracted from the Geographic Information System (GIS). Comparison of model results with the status of BTS active antennas in Kermanshah shows the performance of the model.

Research paper thumbnail of Improvement in Time to CT Imaging in Trauma Evaluations

Research paper thumbnail of The Effect of Substance Abuse Programs on Positive Drug Screening Tests in Trauma Patients

The American Surgeon

Background According to the National Institute on Drug Abuse, West Virginia has the highest age-a... more Background According to the National Institute on Drug Abuse, West Virginia has the highest age-adjusted rate of drug overdose deaths involving opioids. To combat this crisis, comprehensive drug counseling support services were established within the Cabell Huntington Hospital (CHH) system in October 2018 in Huntington, WV, USA. The purpose of this study was to investigate whether these services significantly reduced the number of trauma patients with a positive urine drug screen (UDS) seen at CHH. Methods The trauma registry at CHH was used to obtain data on trauma patients with positive UDS from January 2017 to October 2019, which was divided into groups before and after October 2018. Exclusion criteria were any patients who were prescribed the drug. The percentages of the total number of positive drug screens within each group were calculated, and a t-test analysis was performed to determine the P values. Results 345 trauma patients with positive UDS were selected. Results showed...

Research paper thumbnail of Endovascular Relining of a Perigraft Hygroma after Open Abdominal Aortic Aneurysm Repair

Research paper thumbnail of Comparison of Distress Tolerance and Adjustment of Mothers of Intellectual Disability Children and Mothers of Normal Children in Yasouj City (Iran)

NeuroQuantology

The purpose of the present study was to compare distress tolerance and adjustment of mothers of i... more The purpose of the present study was to compare distress tolerance and adjustment of mothers of intellectual disability children and mothers of normal children. The sample included 94 mothers with intellectual disability children and 94 mothers with normal children. Bell adjustment inventory and Simmons and Gahir Distress Tolerance Questionnaire (DTS) were performed on subjects. The results showed that there was a significant difference between the subjects regarding the components of tolerance distress and adjustment components. It means that mothers of children with intellectual disabilities in components of distress tolerance variable (tolerance, absorption, evaluation, and adaptation) and components of adjustment variable (home adjustment, health adjustment, social adjustment, emotional adjustment, job adjustment) have a lower score.

Research paper thumbnail of Knowledge of medical professionalism in medical students and physicians at Shahid Beheshti University of Medical Sciences and affiliated hospitals—Iran

Medicine, 2016

Although medical professionalism is a fundamental aspect of competence in medicine and a distinct... more Although medical professionalism is a fundamental aspect of competence in medicine and a distinct facet of physicians' competence, evidence suggests that the subject of professionalism is not taught or assessed as part of medical students' curricula in Iran and many other countries. Assessing the knowledge of medical students and physicians about medical professionalism seems to be helpful in identifying the weaknesses of training in the field of professionalism and devise plans for future training on the subject. The present cross-sectional, quantitative, observational, and prevalence study recruited 149 medical interns, clinical residents, physicians, and professors working in hospitals selected through stratified random sampling using a questionnaire designed by the researchers and confirmed for its validity and reliability. The results were analyzed by Stata at a significance level of 0.05. Out of 149 cases, 61.64% were male with the mean age of 30.81 years. A total of 66 participants (44.29%) (95% confidence interval [CI]: 36.44%-52.44%) had heard and 83 (55.70%) (95% CI: 47.55%-63.55%) had not heard the term "medical professionalism" before the study. After adjusting for potential confounders, age and degree did not have statistically significant difference in assessed knowledge of medical professionalism, but sex had (mean difference: 5.88, P = 0.045), and the mean of the female was significantly higher than that of the male participants. The mean percentage of correct answers was 47.67. The present study demonstrated that the medical professionals working in the national healthcare system have an unfavorable theoretical knowledge about medical professionalism in Iran; although this does not indicate that their practices are unethical, it should be noted that one of the prerequisites of possessing a high level of medical professionalism and for establishing a proper relationship between the medical community and the patients is to have a proper knowledge of this concept. Improving behaviors and performances in medical professions requires adequate training on the concepts of medical professionalism and consequently the assessment of the levels of professionalism achieved in medical professionals.

Research paper thumbnail of Laparoscopic vertical sleeve gastrectomy

Medicine

The aim of this study was to evaluate the outcomes after laparoscopic sleeve gastrectomy (SG) in ... more The aim of this study was to evaluate the outcomes after laparoscopic sleeve gastrectomy (SG) in a VA population. SG has recently gained popularity as a definitive bariatric surgery procedure. Data are lacking on long-term outcomes, particularly in a Veterans Affairs population. We retrospectively reviewed 223 patients who underwent SG for morbid obesity between January 2009 and June 2014. Data on length of stay, complications, interval weight loss, comorbidities, and number of therapies preoperatively and at long-term follow-up were collected. There were 164 males and 59 females who underwent SG. The mean body mass index was 45.4 kg/m 2. Mean excess weight loss at 1 year was 62.9%, and 47.0% at 5 years. Weight loss continued until 12 to 18 months, when there was a nadir in weight loss (P < .001). There were 4 deaths and 4 staple-line leaks, with 3 deaths related to late cardiac events. One early death occurred in a very high-risk patient. All staple-line leaks were managed nonoperatively. Of the 223 patients, 193 had hypertension, 137 diabetes, 158 hyperlipidemia, 119 obstructive sleep apnea (OSA), and 125 had gastroesophageal reflux disease. Preoperatively, patients were on a mean of 1.9 antihypertensive and 0.9 hyperlipidemic, anti-reflux and oral hypoglycemic agents. Fifty percent of patients with diabetes were on insulin and 68% with OSA used continuous positive airway pressure/bilevel positive airway pressure (CPAP/BiPAP). We found significant absolute reductions in mean antihypertensive medications (À0.8), hyperlipidemic agents (À0.4), antireflux agents (À0.4), oral hypoglycemics (À0.6), insulin use (À25%), and use of CPAP/BiPAP (À55%) (all P < .001). Laparoscopic sleeve gastrectomy is a safe and effective bariatric surgery procedure, resulting in significant early weight loss up to 18 months and long-term improvement in all major obesity-related comorbid conditions.

Research paper thumbnail of Optimization of Facility Location-Allocation Model for Base Tranceiver Station Antenna Establishment Based on Genetic Al-gorithm Considering Network Effectiveness Criteria (Case Study North of Kermanshah)

Scientia Iranica

The location of the base tranceiver station (BTS) antennas plays important role in the proper ser... more The location of the base tranceiver station (BTS) antennas plays important role in the proper service and coverage of the mobile connection in each region. Proper location of these antennas is a major challenge for operators in each country, as in addition to maximum network coverage, service costs must also be acceptable and competitive. This means that in busy areas, in order to provide better service, the antennas must be greater and closer to each other. In general, the location problem is a type of optimization problem that aims to select a subset of the candidate locations to create the facilities that provide the best service at the lowest cost. To solve such problems in a reasonable time, we can use meta-heuristic algorithms to find solutions that are close to the optimal solution. Accordingly, this paper attempts to apply the genetic algorithm (GA) to find a suitable solution for finding BTS mobile antennas in north Kermanshah. To this end, a GA model is proposed that improves the location coordinates of the current BTS antennas extracted from the Geographic Information System (GIS). Comparison of model results with the status of BTS active antennas in Kermanshah shows the performance of the model.

Research paper thumbnail of Improvement in Time to CT Imaging in Trauma Evaluations

Research paper thumbnail of The Effect of Substance Abuse Programs on Positive Drug Screening Tests in Trauma Patients

The American Surgeon

Background According to the National Institute on Drug Abuse, West Virginia has the highest age-a... more Background According to the National Institute on Drug Abuse, West Virginia has the highest age-adjusted rate of drug overdose deaths involving opioids. To combat this crisis, comprehensive drug counseling support services were established within the Cabell Huntington Hospital (CHH) system in October 2018 in Huntington, WV, USA. The purpose of this study was to investigate whether these services significantly reduced the number of trauma patients with a positive urine drug screen (UDS) seen at CHH. Methods The trauma registry at CHH was used to obtain data on trauma patients with positive UDS from January 2017 to October 2019, which was divided into groups before and after October 2018. Exclusion criteria were any patients who were prescribed the drug. The percentages of the total number of positive drug screens within each group were calculated, and a t-test analysis was performed to determine the P values. Results 345 trauma patients with positive UDS were selected. Results showed...

Research paper thumbnail of Endovascular Relining of a Perigraft Hygroma after Open Abdominal Aortic Aneurysm Repair

Research paper thumbnail of Comparison of Distress Tolerance and Adjustment of Mothers of Intellectual Disability Children and Mothers of Normal Children in Yasouj City (Iran)

NeuroQuantology

The purpose of the present study was to compare distress tolerance and adjustment of mothers of i... more The purpose of the present study was to compare distress tolerance and adjustment of mothers of intellectual disability children and mothers of normal children. The sample included 94 mothers with intellectual disability children and 94 mothers with normal children. Bell adjustment inventory and Simmons and Gahir Distress Tolerance Questionnaire (DTS) were performed on subjects. The results showed that there was a significant difference between the subjects regarding the components of tolerance distress and adjustment components. It means that mothers of children with intellectual disabilities in components of distress tolerance variable (tolerance, absorption, evaluation, and adaptation) and components of adjustment variable (home adjustment, health adjustment, social adjustment, emotional adjustment, job adjustment) have a lower score.

Research paper thumbnail of Knowledge of medical professionalism in medical students and physicians at Shahid Beheshti University of Medical Sciences and affiliated hospitals—Iran

Medicine, 2016

Although medical professionalism is a fundamental aspect of competence in medicine and a distinct... more Although medical professionalism is a fundamental aspect of competence in medicine and a distinct facet of physicians' competence, evidence suggests that the subject of professionalism is not taught or assessed as part of medical students' curricula in Iran and many other countries. Assessing the knowledge of medical students and physicians about medical professionalism seems to be helpful in identifying the weaknesses of training in the field of professionalism and devise plans for future training on the subject. The present cross-sectional, quantitative, observational, and prevalence study recruited 149 medical interns, clinical residents, physicians, and professors working in hospitals selected through stratified random sampling using a questionnaire designed by the researchers and confirmed for its validity and reliability. The results were analyzed by Stata at a significance level of 0.05. Out of 149 cases, 61.64% were male with the mean age of 30.81 years. A total of 66 participants (44.29%) (95% confidence interval [CI]: 36.44%-52.44%) had heard and 83 (55.70%) (95% CI: 47.55%-63.55%) had not heard the term "medical professionalism" before the study. After adjusting for potential confounders, age and degree did not have statistically significant difference in assessed knowledge of medical professionalism, but sex had (mean difference: 5.88, P = 0.045), and the mean of the female was significantly higher than that of the male participants. The mean percentage of correct answers was 47.67. The present study demonstrated that the medical professionals working in the national healthcare system have an unfavorable theoretical knowledge about medical professionalism in Iran; although this does not indicate that their practices are unethical, it should be noted that one of the prerequisites of possessing a high level of medical professionalism and for establishing a proper relationship between the medical community and the patients is to have a proper knowledge of this concept. Improving behaviors and performances in medical professions requires adequate training on the concepts of medical professionalism and consequently the assessment of the levels of professionalism achieved in medical professionals.

Research paper thumbnail of Laparoscopic vertical sleeve gastrectomy

Medicine

The aim of this study was to evaluate the outcomes after laparoscopic sleeve gastrectomy (SG) in ... more The aim of this study was to evaluate the outcomes after laparoscopic sleeve gastrectomy (SG) in a VA population. SG has recently gained popularity as a definitive bariatric surgery procedure. Data are lacking on long-term outcomes, particularly in a Veterans Affairs population. We retrospectively reviewed 223 patients who underwent SG for morbid obesity between January 2009 and June 2014. Data on length of stay, complications, interval weight loss, comorbidities, and number of therapies preoperatively and at long-term follow-up were collected. There were 164 males and 59 females who underwent SG. The mean body mass index was 45.4 kg/m 2. Mean excess weight loss at 1 year was 62.9%, and 47.0% at 5 years. Weight loss continued until 12 to 18 months, when there was a nadir in weight loss (P < .001). There were 4 deaths and 4 staple-line leaks, with 3 deaths related to late cardiac events. One early death occurred in a very high-risk patient. All staple-line leaks were managed nonoperatively. Of the 223 patients, 193 had hypertension, 137 diabetes, 158 hyperlipidemia, 119 obstructive sleep apnea (OSA), and 125 had gastroesophageal reflux disease. Preoperatively, patients were on a mean of 1.9 antihypertensive and 0.9 hyperlipidemic, anti-reflux and oral hypoglycemic agents. Fifty percent of patients with diabetes were on insulin and 68% with OSA used continuous positive airway pressure/bilevel positive airway pressure (CPAP/BiPAP). We found significant absolute reductions in mean antihypertensive medications (À0.8), hyperlipidemic agents (À0.4), antireflux agents (À0.4), oral hypoglycemics (À0.6), insulin use (À25%), and use of CPAP/BiPAP (À55%) (all P < .001). Laparoscopic sleeve gastrectomy is a safe and effective bariatric surgery procedure, resulting in significant early weight loss up to 18 months and long-term improvement in all major obesity-related comorbid conditions.