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Search Results: 1 - 10 of 64 matches for " Homayoon Sadegi "
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A Comparison of Physical Activity and Nutritional Practices in Hypertensive and Non- hypertensive Pregnant Women
Fahimeh Sehati Shafayi,Maryam Akef,Homayoon Sadegi,Akram sallakh Niknazhad
Journal of Cardiovascular and Thoracic Research , 2012,
Abstract: Introduction: Hypertension is the most common medical problem affecting pregnant women during pregnancy contributing to one third of substantial maternal mortality and varieties of fetal and neonatal health problems, while representing health status of a society. This study aimed to investigate the links between a healthy life style and developing hypertension during pregnancy in order to improve healthier behaviors.Methods: In a case-control study from October 2009 to April 2010, physical activity and nutritional practices of two groups of pregnant women (220 in each group) with gestational age of 20 weeks or more, single pregnancy, without any previous medical disorders were compared. Samples in case group had pregnancy induced hypertension. Data were collected using a two-part questionnaire after obtaining informed written consents from mothers before enrollment; later the data were analyzed using the SPSS 13 and Stata software. Results: Women in two groups did not differ regarding their socioeconomic characteristics. There were no significant differences in nutritional practices and level of physical activity in pregnant women of study groups; mean score of physical activity was 54.6±14.8 in test and 57.3±15.0 in control group (P=0.06) and it was 72.9±10.3 and 73.719.5 about nutritional habits in test and control group respectively. Mean pre-pregnancy BMI was higher in case group (P=0.02); these women also had a higher percentage of previous prenatal mortality and history of hypertension.Conclusion: Results state that health during pregnancy is relevant to healthy life style especially preconceptional period; therefore employing proper strategies to improve women knowledge and attitude of the important dimensions of healthy life considering good and healthy diet and active life seem to solve the problem; this needs to unite all health workers to set proper educational programs and courses and support of health policy makers.
Improvement of Antenna Radiation Efficiency by the Suppression of Surface Waves  [PDF]
Homayoon Oraizi, Bahram Rezaei
Journal of Electromagnetic Analysis and Applications (JEMAA) , 2011, DOI: 10.4236/jemaa.2011.33013
Abstract: The characteristics of coplanar waveguide (CPW) fed ring antennas (such as gain, efficiency and polarization purity) are degraded by the dielectric losses and excitation of surface waves on the substrates. To counteract such effects, we propose to remove some portions of the substrate in the vicinity of the metallic patches, which effectively eliminates the conditions for the generation of surface waves. The proposed technique is applied to a CPW-fed ring antenna and a prototype model is fabricated. The measurement data and the computer simulation results agree well and indicate the efficacy of the technique for the improvement of antenna gain and efficiency.
Paraurethral Cysts in a Female Newborn  [PDF]
Shruti Dhapodkar, Kaveh Homayoon
Open Journal of Urology (OJU) , 2011, DOI: 10.4236/oju.2011.13010
Abstract: Paraurethral cysts are a rare congenital abnormality seen in female neonates. We present the case of a female newborn with a paraurethral cyst resulting in urinary obstruction. Surgical intervention was chosen as a result of the obstruction.
Concurrent Presence of Cystic Clear Cell Carcinoma Posing as a Simple Cyst in a Kidney with Primary Papillary Carcinoma  [PDF]
Kaveh Homayoon, Dave Harikrishna
Open Journal of Urology (OJU) , 2012, DOI: 10.4236/oju.2012.22014
Abstract: We report a case with a primary papillary RCC with concurrent presence of a separate occult cystic carcinoma posing as a simple cyst on preoperative imaging studies.
Is nonlinear model predictive control with fuzzy predictive model proper for managing the blood glucose level in typeI diabetes?  [PDF]
Maryam Ahmadi, Amir Homayoon Jafari
Journal of Biomedical Science and Engineering (JBiSE) , 2012, DOI: 10.4236/jbise.2012.52010
Abstract: In recent decades, due to the increasing risk of diabetes, the measurement and control of the blood sugar is of great importance. In typeI diabetes, because of the lack of insulin secretion, the cells cannot absorb glucose, and thus have a low level of glucose. To control blood glucose, the insulin must be injected to the body. In fact, the injection must be in a completely controlled environment. If the level of the insulin exceeds the physiological limits, it may cause death. This paper presents an online approach to control the blood glucose level using a nonlinear model predictive control. This method, maintains the level of blood glucose concentration within a normal range. Thus, the blood glucose level is measured in each minute and predicted for the next time interval. If that is not in the normal range, amount of the insulin which must be injected will be determined. The proposed control approach includes important features such as model uncertainties and prevents acute decrease in the blood glucose level, and instability. In order to assess performance of the proposed controller, computer simulations have been carried out in Matlab/Simulink. Simulation results will reveal the effectiveness of the proposed nonlinear model predictive controller in adjusting the blood glucose level by injecting required insulin. So if the nutrition of the person decreases instantly, the hypoglycemia does not happen.
A Novel Technique for Removal of Urogenital Magnetic Foreign Bodies  [PDF]
Kenneth R. Hassler, Kaveh Homayoon
Open Journal of Urology (OJU) , 2018, DOI: 10.4236/oju.2018.88025
Abstract: Background: There were 800 individual case reports of urogenital foreign bodies in the English literature from 1755 to 1999. The use of urogenital foreign bodies for sexual pleasure is a common occurrence in today’s population. The aim of this discussion is the management of scrotal injury caused by magnetic urogenital foreign bodies. Case Presentation: 56-year-old male with scrotal tissue entrapped between two opposed magnet rings. Self-reported attempts at removal were unsuccessful and caused for presentation to the emergency department. Additional attempts at removal by medical staff unsuccessful in emergency department and therefore the patient proceeded to the operating room. Intraoperatively the use of two cardiac magnets allowed for removal without a need for invasive surgical procedure. Conclusion: Cardiac magnets are preferred means of removal for entrapped skin between magnetic foreign bodies that could be utilized at the bedside.
Factors of Workplace Environment that Affect Employees Performance: A Case Study of Miyazu Malaysia
Nina Munira Naharuddin,Mohammad Sadegi
International Journal of Independent Research Studies , 2013,
Abstract: This study aims to investigate the effect of workplace environment’s factors towards employees’ performance. Data was collected through the survey method; total 139 employees were participated from three main workplace of Miyazu (M) Sdn. Bhd. Based on the findings it shows that only supervisor support is not significant towards the employees’ performance. Meanwhile, job aid and physical workplace environment are having a significant relationship towards the employees’ performance.
Application of Artificial Neural Network, Kriging, and Inverse Distance Weighting Models for Estimation of Scour Depth around Bridge Pier with Bed Sill  [PDF]
Homayoon Seyed Rahman, Keshavarzi Alireza, Gazni Reza
Journal of Software Engineering and Applications (JSEA) , 2010, DOI: 10.4236/jsea.2010.310112
Abstract: This paper outlines the application of the multi-layer perceptron artificial neural network (ANN), ordinary kriging (OK), and inverse distance weighting (IDW) models in the estimation of local scour depth around bridge piers. As part of this study, bridge piers were installed with bed sills at the bed of an experimental flume. Experimental tests were conducted under different flow conditions and varying distances between bridge pier and bed sill. The ANN, OK and IDW models were applied to the experimental data and it was shown that the artificial neural network model predicts local scour depth more accurately than the kriging and inverse distance weighting models. It was found that the ANN with two hidden layers was the optimum model to predict local scour depth. The results from the sixth test case showed that the ANN with one hidden layer and 17 hidden nodes was the best model to predict local scour depth. Whereas the results from the fifth test case found that the ANN with three hidden layers was the best model to predict local scour depth.
A Multi-Dimensional Analysis of Corporate Social Responsibility: Different Signals in Different Industries  [PDF]
Homayoon Shalchian, Kais Bouslah, Bouchra M’Zali
Journal of Financial Risk Management (JFRM) , 2015, DOI: 10.4236/jfrm.2015.42009
Abstract: This study investigates the relation between individual dimensions of corporate social responsibility (CSR) and financial performance in different industries. Using Kinder, Lydenberg and Domini (KLD) social ratings, we find that investors seem to be more sensitive to the dimension “Environment” in mining and manufacturing sectors while they seem to be more sensitive to the dimension “Employees’ welfare” in the service industry. Our results also suggest that investors perceive an additional financial risk from firm’s irresponsible behavior and consequently, they are more pre-occupied by eventual losses caused by firms’ social irresponsibility than by potential financial gains from corporate social performance.
A Multi-Dimensional Analysis of Corporate Social Responsibility: The Liquidity Risk Factor  [PDF]
Homayoon Shalchian, Bouchra M’Zali, Hager Tebini
Journal of Financial Risk Management (JFRM) , 2018, DOI: 10.4236/jfrm.2018.73016
Abstract: This study is an extension to Shalchian et al. (2015) and investigates the effect of the “liquidity” risk factor on the performance of socially responsible investments in different industries and based on different dimensions of corporate social responsibility. Using Pastor and Stambault’s liquidity risk factor, we find that in the mining industry and based on the dimensions of “environment”, “employees’ relations” and “community involvement”, socially responsible investments are relatively less exposed to the liquidity risk factor. Our results also suggest that compared to conventional investments in the manufacturing and service industries, socially responsible investment’s performance is more sensitive to the liquidity risk factor.
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