javad karami

Renewable energies, such as wind and solar energy have attracted the attention of scientific, research, and industrial communities due to its fewer threats to the environment and human health. The purpose of this study was to identify and assess the safety and health risks of the Sun Air research institute of Ferdowsi University of Mashhad.

In this descriptive cross-sectional study, the failure mode and effect analysis (FMEA) technique was used to identify and assess the risks of all Sun Air Research Institute of Ferdowsi University of Mashhad units in the second half of 2019. The HSE management team identified the risks of each unit separately and assessed the risks. All risks were prioritized following identification based on the range of priority numbers (RPN) method resulting from multiplication of the Occupancy, Severity, and Detectability components as well as the control measures.

The RPN ranged from 18 cases related to repetitive work in inspection operations to RPN=180 related to electric current leakage. Among the risks, three potential risks had higher priority, which included electric current leakage (RPN=180), inhalation of toxic substances (RPN=162), and falling from a height (RPN=150). Other risks were ranked next in priority.

The results showed that use of FMEA technique was appropriate to identify and assess occupational risks in research and renewable energy production environments that lead to identification of risks at different levels. This helps the HSE team to eliminate or reduce the level of risks by providing control solutions with the priority of unacceptable risks.

Today, one of the most critical, most important, and in fact inevitable organizational issues to survive, stay competitive and improve performance, is to properly perform employee performance appraisals and gain feedback and then impact the results on reform. It is relevant. The purpose of this research is to explain and prioritize the dimensions and components of the performance appraisal system of senior officers. In this way, the researcher seeks to answer the question of what priority are the components and indicators of the performance evaluation of the infantry officers. This research is a descriptive and case-based approach in the squatter community. The results show that physical fitness and mental health are the first priority and evaluation tariffs are the last priority.Today, one of the most critical, most important, and in fact inevitable organizational issues to survive, stay competitive and improve performance, is to properly perform employee performance appraisals and gain feedback and then impact the results on reform. It is relevant. The purpose of this research is to explain and prioritize the dimensions and components of the performance appraisal system of senior officers. In this way, the researcher seeks to answer the question of what priority are the components and indicators of the performance evaluation of the infantry officers. This research is a descriptive and case-based approach in the squatter community. The results show that physical fitness and mental health are the first priority and evaluation tariffs are the last priority.

Nutrition affects physical status, brain function, memory and learning. High-fat diets can cause memory impairment. The aim of this study was to investigate effects of cheese and butter on the memory and learning of male rats.

Totally, 24 Wistar male rats (8-week old) were divided into three equal groups and fed with high-fat chow diets (control group) or two experimental diets of butter and cheese for 12 weeks. Then, spatial memory and passive avoidance learning (PAL) were assessed using Morris water maze test and shuttle-box apparatus, respectively.

In PAL test, step-through latencies in retention (STLr) test and time spent in the dark compartment (TDC) were significantly different between the groups. The step-through latencies in retention scores of the butter group were significantly lower than that of the control and cheese groups. However, dark compartment of the butter group was significantly greater than that of the control and cheese groups. In Morris water maze test, no significant differences were seen in escape latency, travelled distance and mean swimming speed of the various groups. During the probe trial, the butter groups spent significantly less time in the target quadrant than that the control and cheese groups did.

In general, cheese includes further favourable effects on spatial memory and PAL, compared to that butter groups do.

Water Oxidation Reduction Potential (ORP)is a physicochemical index of water affected by a combination of oxidation and reduction agents in water and wastewater. In addition to affecting many water quality parameters, this index indicates a general quality of water and wastewater. The purpose of this study was to investigate the effect of different levels of water ORP on quality indices of warm-water aquaculture wastewater parameters, including COD, BOD, TOC, nitrate and phosphate. To conduct this research, triplicate wastewater treatment in four ORP treatments with levels of 250-200 (control treatment), 250-200 (first treatment), 350-300 (second treatment), 400-350 (third treatment) mv in 70 L tanks conducted in for four weeks. Different levels of ORP in treatments were performed by ozonizing device on a daily basis and the ORP was measured with an ORP digital meter. According to the results, by increasing the ORP level in treatments, BOD, COD and nitrate factors decreased significantly but increasing of ORP level did not show significant effect on phosphate and TOC factors. In addition, the results of the study showed using of oxidizing agents such as ozone and regulating of ORP range could be used as an appropriate tool for improving the quality indices of warm-water aquaculture wastewater.

The tire industry is a pivot point in the transportation fleet of any country, and Tire is considered as a strategic commodity, and with 15,000 people in the industry, it is one of the most powerful intermediary industries between petrochemicals and automobiles. The purpose of this study is to analyze hazards Health, Safety and Environment (HSE) of the YASA Rubber Industry is based on the combined approach of HEMP and BOW-TIE. The HSE management team identifies risks and assesses the industry's risks. After identifying the level of unacceptable risks in the HEMP, Hierarchical Analyzes (AHP), high risk risks were prioritized, and BOW-TIE software provided control measures and barriers. The findings of the study were that among the identified risks, the high volume of flammable materials, overloading operations with overhead cranes, electricity, load at height and fracturing were very high. The risk of ignition by AHP method was oboidizing these hazards. Patch with the value of 0.50 was the highest. The results of the research indicated that for high risk of the factory, safe and effective control barriers and effective measures for the critical industries in the rubber industry should be carried out in accordance with the standards and procedures.

Todays, in addition to the optimal hydraulic design of water distribution networks, the optimization of energy consumption in pumping station is more important for researchers. Due to the energy costs include the major part of operation cost at a water network, in this paper study the optimization of daily energy cost of pumping station with five parallel pumps, using by Darwing scheduler module at WaterGEMS V8i software based on Simple Genetic Algorithm (SGA) and Fast Messy Genetic Algorithm (FMGA). The hydraulic constraints include the minimum pressure and maximum pressure of junctions, maximum velocity of pipes and maximum number of economic off and on of pumps. The results showed that the energy costs reduced 15 and 10 percent using by Simple Genetic Algorithm (SGA) and Fast Messy Genetic Algorithm (FMGA), respectively, with regard to electricity tariffs in To optimize the performance was achieved without pumps.so we achive 10 and15persent reduce energy cost.