Airborne antenna pattern calculations

Use of calculation program START and modeling program P 3D to produce radiation patterns of antennas mounted on a space station is discussed. Basic components of two space stations in the early design stage are simulated and radiation patterns for antennas mounted on the modules are presented

Comparative study of some cardiovascular diseases risk factors in type D personality and non- type D personality

زمینه و هدف: ریخت شخصیتی D (Distressed personality) حدود 21 جامعه سالم را تشکیل داده است و به عنوان یک ریسک فاکتور در بروزبیماری های قلبی-عروقی شناخته می شود. این تحقیق به منظوربررسی برخی ریسک فاکتورهای بروز بیماری های قلبی در افراد بزرگسال سالم دارای ویژگی ریخت شناسی D انجام شده است. روش بررسی: در این مطالعه توصیفی-تحلیلی 54 نفر (زن و مرد) از بین مراجعه کنندگان به مرکز آزمایشگاهی المهدی شهرکرد به روش نمونه گیری در دسترس انتخاب شدند. افراد تحت مطالعه بر اساس مقیاس DS14 به دو گروه تقسیم شدند. 27 نفر آنها که دارای تیپ شخصیتی D بودند در گروه مورد و 27 نفر دیگر که فاقد تیپ شخصیتی Dبودند در گروه شاهد قرار گرفتند. داده های پژوهش از طریق آزمون افسردگی بِک (Beck)، مقیاس های اضطراب و خشم اسپیلبرگر و نتایج آزمایشگاهی کلسترول، تری گلیسیرید،LDL و HDL جمع آوری شدند. برای تجزیه و تحلیل داده ها ازآزمون t مستقل استفاده شد. یافته ها: میزان اضطراب، افسردگی، خشم و LDL در گروه مورد به طور معنی داری بیشتر از گروه شاهد بود بود (05/0>P). میزان HDL بصورت جزئی در گروه مورد کمتر از گروه شاهد بود (052/0= P) و ارتباط معنی داری بین شخصیت D وکلسترول و تری گلیسیرید دیده نشد (05/

Genetic relationships of Iranian coastline ship sturgeon (Acipenser nudiventris) samples and Ural population based on microsatellite DNA

Genetic relationships among 96 specimens of ship sturgeon, Acipenser nudiventris, collected from six locations along the Iranian coastline as well as 8 specimens from northern population (Ural River) were analysed by the restricted maximum likelihood method, as well as two distance analysis method (Nei's and Cavalli-Sforza's distance) of gene frequencies. We have used four SSR markers that produced three polymorphic and two monomorphic loci. Overall results showed that Iranian coastline samples form a monophyletic group (clade) which was different from the northern (Ural) samples. Iranian coastline samples are divided into two groups (clades): Anzali-Kiashahr clade and Sefidrud-Babolsar-Noushahr-Gorgan clade. Bootstrapping test showed monophyleticity of Sefidrud, Babolsar, Noushahr, Gorgan with high (Bootstrap support=93) and Anzali-Kiashahr with middle (Bootstrap support=65) confirmation. Topology of reconstructed trees was in correspondence with geographical distributions of samples

Electrophysiological Assessment of Injury to the Infra-patellar Branch(es) of the Saphenous Nerve during Anterior Cruciate Ligament Reconstruction Using Medial Hamstring Auto-grafts: Vertical versus Oblique Harvest Site Incisions

Background: It was suggested that the direction of incision for medial hamstring tendons harvesting\n influences the incidence of injury to the infrapatellar branch of the saphenous nerve\n (IPBSN), a common complication following arthroscopically-assisted anterior cruciate\n ligament reconstruction (ACLR). Objectives: The main purpose of current study was to compare the incidence of IPBSN injury between\n vertical and oblique incisions utilizing electrophysiological evaluation. Patients and Methods: There were 60 patients underwent arthroscopically-assisted ACLR assigned to two equal\n vertical or oblique incision groups, randomly. One year postoperatively, the patients\n were electrophysiologically examined to detect whether IPBSN is injured. The Lysholm\n score was completed. The patients' satisfaction with surgical outcomes determined\n utilizing visual analogue scale (VAS). Finally, two groups were compared and the effect\n of IPBSN injury on function and satisfaction was investigated. Results: The incidence of IPBSN injury was higher in the vertical group (4 patients vs. 10\n patients), but the difference was not statistically significant. The mean of Lysholm and\n VAS scores were the same. Also, the mean of Lysholm score was the same in patients with\n and without IPBSN injury. However, patients without IPBSN injury were more satisfied\n (8.9 ± 9 vs. 7.4 ± 1.1; P < 0.001). Conclusions: IPBSN injury is a common complication following arthroscopically-assisted ACLR and, if\n not significant, oblique direction of the incision is associated with decreased\n incidence of the injury. IPBSN injury has no effect on the function but because of the\n disturbance with patients' satisfaction, authors believe the oblique incision is\n preferable to avoid the nerve injury during medial hamstring tendons harvesting

The Effects of Folic Acid Supplementation on Recurrence and Metabolic Status in Endometrial Hyperplasia: A Randomized, Double-Blind, Placebo-Controlled Trial

Abstract: Background: Data on the effects of folic acid supplementation on clinical symptoms and metabolic profiles of patients with endometrial hyperplasia (EH) are limited. This investigation was performed to evaluate the effects of folic acid supplementation on clinical symptoms and metabolic status of patients with EH. Methods: This randomized, double-blind, placebo-controlled trial was conducted among 60 women diagnosed with EH. Diagnosis of EH was made based on biopsy results. Participants were randomly allocated to 2 groups to take 5 mg/d folic acid supplements (n = 30) or placebo (n = 30) for 12 weeks. Results: After the 12-week intervention, folic acid supplementation significantly decreased fasting plasma glucose (β -3.99 mg/ dL; 95% CI, -7.39, -0.59; P = 0.02), serum insulin levels (β -2.82 µIU/mL; 95% CI, -4.86, -0.77; P = 0.008), homeostasis model assessment for insulin resistance (β -0.68; 95% CI, -1.20, -0.17; P = 0.009), triglycerides (β -16.47 mg/dL; 95% CI, -28.72, -4.22; P = 0.009) and very-low-density lipoprotein (VLDL) cholesterol (β -3.29 mg/dL; 95% CI, -5.74, -0.84; P = 0.009), and significantly increased the quantitative insulin sensitivity check index (β 0.01; 95% CI, 0.004, 0.03; P = 0.01) compared with the placebo. Additionally, folic acid intake resulted in a significant reduction in serum high sensitivity C-reactive protein (hs-CRP) (β -0.36 mg/L; 95% CI, -0.52, -0.21; P &lt; 0.001) compared with the placebo. Folic acid supplementation did not affect other metabolic parameters. Conclusion: In conclusion, we found that folic acid administration for 12 weeks to subjects with EH improved glycemic control, triglycerides, VLDL-cholesterol and hs-CRP levels, but did not influence recurrence and other metabolic profiles

Association of food allergies, cow�s milk allergy, and asthma with pediatric inflammatory bowel disease

There are controversies on the association of childhood allergic diseases with inflammatory bowel diseases (IBD). The aim of this study was to examine the association between food allergy, cow�s milk allergy (CMA), and asthma with pediatric IBD in Iranian population. This case-control study was conducted on 200 individuals less than 18-year-old (100 with IBD and 100 as control group). Medical records, clinical presentation, and laboratory and para-clinical findings related to food allergy, CMA, and asthma were reviewed for all participants in both groups and were recorded. Among 100 children with IBD, 40 had Crohn's disease, and 60 had ulcerative colitis. The frequency of food allergy, cow's milk allergy, and asthma in children with IBD was significantly higher than the control group (P<0.001). Asthma in children with Crohn's disease was significantly more prevalent than children with ulcerative colitis (P=0.008). Food allergy (OR: 22.1, 95 CI: 5.1-95.05, P<0.001), CMA (OR: 15, 95 CI: 3-67, P<0.001), and asthma (OR: 10, 95 CI: 3-37.05, P<0.001) were significantly associated with increased risk of IBD in children. Food allergy, CMA in infancy and asthma are more prevalent in children with different subtypes of IBD. The diagnosis of these risk factors is associated with increased risk of Crohn's disease and ulcerative colitis. © 2018 Tehran University of Medical Sciences. All rights reserved

Assessment of watershed management implemented on springal peak flood discharge and flood volume, using HEC-HMS model (case study: Kushk Abad sub-basin in Iran)

Assessment of watershed management operation is one of the main subjects for future planning of practical projects and natural resources management. Flood Damage is one of the most important problems in countries same Iran, which is mostly, affected most parts of the country and caused hazards. Therefore, identification of the area with high potential risk of flood occurrence is the main purpose in order to the flood control and reducing its damages. Due to the lack of any tool for assessment of watershed processes in many cases, distributed hydrological models can be useful. The indicator watershed of Kushk-Abad Basin as the study area in Khorasan province of Iran divided to 6 sub-basins which was processed geometrically using GIS and HEC-HMS extension. With using HEC-HMS model and emission of individual repetition of the sub-basins, the homogenous flood hydrographs have gained in relation to the recorded precipitation calculated for different sub-basins. For this purpose, first by considering observed events, HEC-HMS model was optimized and calibrated. Then, for evaluating the effects of check dams on time of concentration, it was optimized and calibrated. Then, for evaluating the effects of check dams on time of concentration, it was calculated before and after of check dam’s construction by use of field observations and vegetation cover improvement was also estimated after the project. These parameters were imported to HEC-HMS to find out the effects of watershed practices and then flooding condition was simulated. For assessment purposes, peak discharche and flood volume were calculated for before and after construction conditions. Results showed that check dams as mechanical measures had low effect on time of concentration while biological practices lead to decease in curve number with an average value of 4.5. This result in decrease of peak flow and flood volume meanly 19% and 14%, respectively

Association of food allergies, cow�s milk allergy, and asthma with pediatric inflammatory bowel disease

There are controversies on the association of childhood allergic diseases with inflammatory bowel diseases (IBD). The aim of this study was to examine the association between food allergy, cow�s milk allergy (CMA), and asthma with pediatric IBD in Iranian population. This case-control study was conducted on 200 individuals less than 18-year-old (100 with IBD and 100 as control group). Medical records, clinical presentation, and laboratory and para-clinical findings related to food allergy, CMA, and asthma were reviewed for all participants in both groups and were recorded. Among 100 children with IBD, 40 had Crohn's disease, and 60 had ulcerative colitis. The frequency of food allergy, cow's milk allergy, and asthma in children with IBD was significantly higher than the control group (P<0.001). Asthma in children with Crohn's disease was significantly more prevalent than children with ulcerative colitis (P=0.008). Food allergy (OR: 22.1, 95 CI: 5.1-95.05, P<0.001), CMA (OR: 15, 95 CI: 3-67, P<0.001), and asthma (OR: 10, 95 CI: 3-37.05, P<0.001) were significantly associated with increased risk of IBD in children. Food allergy, CMA in infancy and asthma are more prevalent in children with different subtypes of IBD. The diagnosis of these risk factors is associated with increased risk of Crohn's disease and ulcerative colitis. © 2018 Tehran University of Medical Sciences. All rights reserved

Malnutrition Has No Effect on the Timing of Human Tooth Formation

The effect of nutrition on the timing of human tooth formation is poorly understood. Delays and advancements in dental maturation have all been reported as well as no effect. We investigated the effect of severe malnutrition on the timing of human tooth formation in a large representative sample of North Sudanese children. The sample (1102 males, 1013 females) consisted of stratified randomly selected healthy individuals in Khartoum, Sudan, aged 2-22 years using a cross-sectional design following the STROBE statement. Nutritional status was defined using WHO criteria of height and weight. Body mass index Z-scores and height for age Z-scores of ≤-2 (cut-off) were used to identify the malnourished group (N = 474) while the normal was defined by Z-scores of ≥0 (N = 799). Clinical and radiographic examination of individuals, with known ages of birth was performed including height and weight measurements. Mandibular left permanent teeth were assessed using eight crown and seven root established tooth formation stages. Mean age at entry and mean age within tooth stages were calculated for each available tooth stage in each group and compared using a t-test. Results show the mean age at entry and mean age within tooth stages were not significantly different between groups affected by severe malnutrition and normal children (p>0.05). This remarkable finding was evident across the span of dental development. We demonstrate that there is little measurable effect of sustained malnutrition on the average timing of tooth formation. This noteworthy finding supports the notion that teeth have substantial biological stability and are insulated from extreme nutritional conditions compared to other maturing body systems

Further evidence of psychological factors underlying choice of elective cesarean delivery (ECD) by primigravidae

Objective: Requests for elective cesarean delivery (ECD) have increased in Iran. While some sociodemographic and fear-related factors have been linked with this choice, psychological factors such as self-esteem, stress, and health beliefs are under-researched. Methods: A total of 342 primigravidae (mean age = 25 years) completed questionnaires covering psychological dimensions such as self-esteem, perceived stress, marital relationship quality, perceived social support, and relevant health-related beliefs. Results: Of the sample, 214 (62.6%) chose to undergo ECD rather than vaginal delivery (VD). This choice was associated with lower self-esteem, greater perceived stress, belief in higher susceptibility to problematic birth and barriers to an easy birth, along with lower perceived severity of ECD, fewer perceived benefits from VD, lower self-efficacy and a lower feeling of preparedness. No differences were found for marital relationship quality or perceived social support. Conclusions: The pattern suggests that various psychological factors such as self-esteem, self-efficacy, and perceived stress underpin the decision by primigravidae to have an ECD