فهرست مطالب shahin besharati

The 2019 global Coronavirus syndrome pandemic (COVID-19) has entered more than two hundred countries around the world, involving <82 million persons and >1,800,000 deaths (until January, 1st 2021). We report on COVID-19 infection in the context of a Cushing's syndrome (CS) from Iran. A 36-year-old man with proximal myopathy, plethora, and striae with central obesity was evaluated for Cushing's syndrome. During the high dose dexamethasone test, the patient developed symptoms of cough, low-grade fever, and weakness then was admitted to the ICU with a diagnosis of COVID-19. Despite treatment according to national protocols for COVID-19, the patient unfortunately died. In this report, we intend to discuss the various aspects of Cushing's syndrome and severe COVID-19 infection.

Carriage of backpack sprayers is an inevitable part of agricultural operations that increases the risk of injury along with undesirable changes in walking mechanics. The purpose of this study is to formulate the muscle moment changes in the hip, knee and ankle for the backpack sprayer operator body.

In this study, a seven-link sprayer operator model is designed and the moment changes in the hip, knee and ankle joints are evaluated. Data are obtained using Plot-digitizer software. Excel software is used to fit the third degree curve on the data.

In the hip joint, the moment is reduced by changing the angle from zero to 15°. At the end of the swing phase, the moment applied to the hip joint increases with increasing the angle up to 30°. In the beginning of the swing phase, the knee joint starts to open at -55°. At the end of the swing phase, the knee joint releases up to -5 ° and the moment applied to the knee joint increases slowly. The moment applied to the ankle joint increases by changing the ankle angle from -7.5° to 7.5°.

According to the results of this study, amount of moment changes of hip, knee and ankle joint affect the force applied to the backpack sprayer operator body. With the knowledge of the moment changes of joints, practical solutions can be provided to reduce amount of damage to these joints.

There is an especial importance in machines used for washing the agricultural tuber products. Optimized use of water, energy and attention to the economical aspects are important factors in design of these machines. Regarding these factors, a device was designed, constructued and tested. Experiments were carried out to measure and analyze the amount of impurities and wastes, and the percentage of damage based on a randomized complete block design with factorial experiment with two products, three levels of input weight; three levels of speed of conveyor belt each with four replications. The results showed that the weight of the input product and the speed of the conveyor belt had no significant effect on the amount of waste materials per kg of product, but had a significant effect on the percentage of damages. The damage for potato was significantly higher than carrot. The optimum speed of the conveyor belt was found at 2.4 m s-1 for 5 kg min-1 feeding. The amount of water saved by the machine was one l min-1. Based on the results, with use of a filter in water circulation system and recycling the water, water saving of 50% was obtained.

Type 2 autoimmune polyglandular (Schmidt) syndrome (APS-2) is defined by the occurrence of at least 2 out of 3 of the following manifestations, Addison's disease, Hypothyroidism and Type 1 diabetes mellitus. APS-2 is a rare condition with an incidence of 1–2/100 000 per year. Prevalence of APS-2 is most happening in the range of 20-40 years of age. Here we present a patient who complained about loss of appetite with significant weight loss also having trouble with her skin saying she had experienced progressively darkening of the skin all over her body and manifestations of Addison's disease at the age of 70. The patient was treated with oral Prednisolone, Fludrocortisone and Levothyroxine and evaluated after one month which showed the hormonal panel within the normal range.

The solar radiation data play a very important role for understanding internal structure of solar systems. Due to weather conditions, solar radiation has high fluctuation. Analysis of radiation data help to optimizing these systems. Fractal dimension is one of the methods to analyze time series such as radiation. In this paper some methods such as Sevcik, Katz, MRL, PetrosianD, PetrosianC and Higuchi are used to estimate fractal dimension. These methods were coding by MATLAB software and then the data was analyzed. The result of ANOVA showed that temperature on the wet basis in the MRL method was significant at 1% and relative humidity in the PetrosianC was significant at 5%. According to results, Higuchi method had maximum mean value of fractal dimension and Petrosian method had minimum mean value of fractal dimension. Also fractal dimension of Petrosian method was less than1, therefore, Petrosian method is not reliable(because fractal dimension is a number between 1 and 2). Also, Sevcik and Higuchi was the suggested method for future researches.

In this research the effects of moisture content and cutting speed on the specific shearing energy and shearing stress for four variety of almond tree (Mamayy, Rabi, Sefid and Shahrodi12) was investigated and results the each any the varieties were compared with each other. Shear properties of almond wood varieties in this study, using a universal testing machine manufactured STM20 Sntam was determined. Knife bevel form of one-sided and edge angle is 40 degree.The characteristics at three moisture levels of 18, 25 and 45% (w.b.) wet basis, three cutting speed levels of 20, 30 and 40 mm/min and in three size 6, 9 and 12 mm were determined. The results of analysis of variance (ANOVA) showed specific shearing energy and shearing stress to all test factors were response significant (P

Hepatitis-B virus (HBV) infection is a big problem in chronic kidney disease (CKD) population. We attempted to compare the response rate to HB vaccine in CKD stages3-4 patients with that in hemodialysis (CKD stage-5; HD patients) and medical staff. Three hundred and three participants were enrolled into the study to test the seroconversion rate after vaccination. Participants formed three groups: GroupA:HD patients, GroupB: diagnosed with CKD stages34, and GroupC: healthy medical staff. CKD stages34 participants were vaccinated from February to November 2010. HD patients were vaccinated at the time of initial HD and medical staff at the time of being hired. GroupA, GroupB and GroupC received four 40μg(in 0,1,2 and 6 months), three 40μg(0, 1 and 6 months) and three 20μg(0, 1and 6 months) doses of HB vaccine, respectively. Three months after completion of the vaccination schedule, seroconversion and seroprotection rates in each group were investigated. Seroconversion rates were 44.3%, 89.7%, and 96.2% for groups A, B and C, respectively. CKD stages 34 patients showed higher response rate than dialysis patients [χ2(1):30.6, P <0.001]. But a significant difference in the seroconversion rate between CKD stages34 patients and medical staffs was not observed [χ2(1):3.4, P = 0.064]. Multivariate analyses showed patients with more advanced CKD and who were older had less seroconversion rates [odds ratio: 0.09(95%CI: 0.040.25) and [odds ratio: 0.39(95% CI: 0.180.85)], respectively. But sex was not associated with seroconversion (P>0.05). Stages34 patients with higher dosages of routine HB vaccine had higher seroconversion rate than HD patients. Future studies should evaluate the recommended dosage of HB vaccine among these patients.