فهرست مطالب نرگس مقدسی

Obesity and overweight are major global health challenges. One of the bad effects of noise that has been recently expressed is the effect of noise on obesity. This study aimed to investigate the effect of high-frequency noise exposure on obesity, food intake, and abdominal visceral fat in adult male guinea pigs.

The animals in this study were 24 adult male guinea pigs randomly divided into 3 groups (control and two case groups). Each case group was separately exposed to high- frequency white noise with sound pressure levels in 65 dB and 85 dB for 5 days per week in 30 days. The food intake was measured daily. The weight of animals was measured at the start and on days 6, 12, 18, 24, and at the end of exposure period. The abdominal visceral fat was extracted and weighted at the end of the study period. The data were assessed using SPSS V.22 software.

ANOVA analysis showed that exposure to high-frequency noise at 65dB and 85dB had a significant effect on weight gain, food intake, and abdominal visceral fat weight (P-value< 0.05) which in the group exposed to the noise with 65 dB was more than other groups.

Based on this study, exposure to high-frequency noise may be an effective factor in obesity and increasing abdominal visceral fat. Further studies are needed to investigate the mechanism affecting weight status following noise exposure.

The purpose of this study was to investigate the effect of audit report quality on audit risk with respect to the mediating role of earnings management and corporate governance. The location of companies listed on the Tehran Stock Exchange and the time period between 2014 to 2020 and 135 companies have been selected as a statistical sample by the method of systematic elimination. For data collection, reference to financial statements, explanatory notes and stock exchange monthly, and in order to describe and summarize the data, descriptive and inferential statistics have been used. In data analysis, F-Limer test, Hausman test and to confirm and reject the hypotheses (Ives software) have been used. The results showed that there is a relationship between ownership structure and financial distress and also the quality of corporate governance and earnings management moderates the negative impact of audit report quality on audit risk

Erosion control in coastal areas, is imperative.Lian coastal area near the Bushehr nuclear power plant, which has a beautiful natural landscape, is being destroyed.The aim of this study is to evaluate the performance of groyn structures in the area.Using software MIKE21, Lian Shoreline is modeled. Trial and error method, groyn structures with different lengths in different areas of the site have been placed and sedimentation and erosion has been studied in each case.The results of this study indicate that the use of the groyn protecting the coastal beaches, if not done with careful study, can cause detrimental effects on downstream structures.The location of the groyn and the shoreline motion and position relative to each other, will affect on sedimentation and erosion and it’s volume.Modeling helps to choose the appropriate structures and it’s location for the site depending onareausage. For example, in point x=150 of the coastal line, after placing two groyn with length of 500 m, approximately 120 m of erosion will occur after 20 years.Although increasing the length of the breakwater to 850 meters, the erosion rate in this point reaches 23 meters. In point x=85 of the coastal line, after placing two groyn with length of 500 m, we have almost 275 meters deposition after 20 years. Although increasing the length of the breakwater to 850 meters, deposition will be 285 meters.