majid mousavi

Cysticercosis is a worldwide disease that affects farm animals and, in some cases, like bovine and porcine cysticercosis, is considered zoonosis. This condition, in sheep and goats, results in economic losses especially due to the condemnation of edible offals or meat. In this concern, the aim of this study was to examine cysticercosis and factors influencing the frequency and weight of relevant meat or red offals condemnation among the sheep and goats slaughtered at a slaughterhouse in Iran.  A one-year retrospective cross-sectional epidemiological study was carried out to examine the presence of cysticercosis at postmortem inspection. Data regarding the date of slaughter, animal species, sex, and the type of cysticercosis infection (Cysticercus ovis or Cysticercus tenuicollis) were recorded.  A total of 17530 carcasses were contaminated with different types of cysticercosis, and among them, 9072 offals were rejected and 291 cases were totally condemned. During winter the number of contaminated samples was higher compared to the other seasons. Goats were only infected with C. ovis and none of them were totally condemned. The mean proportion of condemned tissues in each contaminated sample was higher in sheep (0.5 kg/case). The damaging effects of cysticercosis in male carcasses were greater than in females, and C. ovis infection resulted in higher weight and rate of offal and carcass condemnation.  In conclusion, it seems that a comprehensive antihelminth strategy must be followed by the relevant food animal producers to decrease the economic losses and zoonoses problems caused by cysticercosis.

The aim of research is Evaluation effective factors on performance of HSE in Pars Service Port. The research has application nature and in methodology is a survey-descriptive method. With using of national and international researches, 20 factors impact on performance of HSE in Pars Service Port identified and designed in questionnaire and replied by 83 of responsible and experts of HSE of companies in Pars Service Port. Findings of the research show human resources of this department (number and their education), equipment, superior managers and employees of port, workers and employers active in port and regulating are macro factors impact on performance of HSE department. Among identified factors, superior managers and employees of port, employers active in port and regulating have good condition but workers haven’t good performance in environment subject. Also human resources of this department (number and their education) and equipment have problems and need to consider them.

One of the important indicators in organizational studies is job satisfaction. If one is not satisfied with one's career, reactions such as leaving the service, spreading rumors, damaging the organization and its equipment, underemployment, and evading organizational organization in the workplace show a decrease in individual productivity. The aim of this study was to investigate the effect of job satisfaction on anti-production behaviors in the workplace with emphasis on social loafing. The results of this paper are the result of applied research of descriptive-survey type. The statistical population of the employees of the Social Security Organization is Hashtpar. The method of data collection is field and a standardized questionnaire has been used to collect data. The reliability of the questionnaire was estimated by Cronbach's alpha coefficient above 0.7. The validity of the research instrument was confirmed by the content validation method. In order to analyze the data, the structural equation modeling method based on the partial least squares approach was used by Smart PLS3 statistical software. The research findings showed that job satisfaction has a negative and significant effect on anti-production behaviors. Also, the role of social loafing in relation to job satisfaction and anti-production behavior was confirmed.

Coronary angiography is the most common angiographic procedure for diagnosis and treatment of the heart diseases. Herein, we aimed to evaluate the entrance surface dose (ESD), dose area product (DAP), as well as cancer risk in interventional cardiology procedures.
This study was conducted during July-December 2015 at Shahid Madani Heart Center in Khorramabad, Iran. A total of 225 adult patients including 122 females and 103 males regardless of the risk factors for coronary diseases were participated. Of them, 199 and 26 patients underwent diagnostic coronary angiography (CA) and percutaneous transluminal coronary angioplasty (PTCA), respectively. Each patient underwent CA or PTCA separately. All the procedures were carried out using Siemens angiography system with the pulsed fluoroscopy of 10-30 pulses/s and cine frame rate of 15 frames/s. DAP, ESD, fluoroscopy time (FT), as well as the number of sequences and frames per sequence were collected for each 199 CA and 26 PTCA procedures.
The median values of DAP were 19.77±14.88 and 57.11±33.36 Gy.cm2 in CA and PTCA, respectively. In addition, the median values of ESD were 323.12±245.39 and 1145.22±594.42 mGy in CA and PTCA, respectively. FTs were 114.59±74.33 s in CA and 424.15±292.93 s in PTCA.
The average patient dose and cancer risk estimates in both CA and PTCA were consistent with the reference levels. However, in agreement with other interventional procedures, dose levels in the interventional cardiology are influenced by staff and clinical protocols, as well as the type of equipment.

In this research, the effects of foulings on the outer surface of a marine vessel have been studied using the Computational Fluid Dynamics (CFD) methods. To this end, a proper turbulence model was considered and validated for the simulations. The simulation results for different fouling grades indicated that existing of a thin layer of slime could make 4.58 % increase in drag force; however, foulings on the outer surface of a marine vessel could make about 40% increase in drag force. In this study, the application of modern coatings (surface covers) for reducing the foulings and the resulting drag force was also investigated and the results were presented. Based on the simulation results, application of the coatings, the foulings resulted drag force would decrease about 37%. In addition, wave patterns, pressure distribution, drag coefficient distribution, and turbulent distribution profile were investigated on the free surface.

Hydrodynamic performance of a marine vessel mainly depends on the frictional and pressure resistance. Pressure drag reduction could be achieved by improving the shape of the vessels with implementation of modern hull forms. Hull forms optimization techniques could also be used for this purpose. Other techniques are needed to deal with the viscous portion of the total resistance, which is mainly frictional resistance. In this paper, an extensive literature review on the different methods applied to reduce the resistance of marine vessels was made, and the advantages and disadvantages of the implemented methods were identified. The related papers were categorized into three main categories and a summary of experimental and theoretical studies was provided.
On the basis of results obtained from the reviewed research studies, the combination of hull form optimization methods with other applicable drag reduction technologies such as antifouling coating is recommended to optimize the hydrodynamic forces.