New Full-Diversity Space-Time-Frequency Block Codes with Simplified Decoders for MIMO-OFDM Systems

Multiple-input multiple-output orthogonal frequency-division multiplexing (MIMO-OFDM) is known as a promising solution for wideband wireless communications. This is why it has been considered as a powerful candidate for IEEE 802.11n standard. Numerous space-frequency block codes (SFBCs) and space-time- frequency block codes (STFBCs) have been proposed so far for implementing MIMO-OFDM systems. In this paper, at first we propose new full-diversity STFBCs with high coding gain in time-varying channels; the construct method for this structure is using orthogonal space-time block code for any arbitrary number of transmit antenna and then we propose a decoder with linear complexity for our proposed coding scheme. Simulation results verify that the proposed STFBCs outperform other recently published STFBCs

Effect of vitamin D3 supplement in glycemic control of pediatrics with type 1 diabetes mellitus and vitamin D deficiency

Background: Glycemic control prevents microvascular complications in patients with type I diabetes mellitus such as retinopathy, nephropathy and neuropathy that influences quality of life. Some studies show the immunomodulatory effect of vitamin D in synthesis and secretion of insulin. Aims: In this study we evaluate glycemic changes after vitamin D3 supplement in children with type I diabetes mellitus and vitamin D deficiency. Materials and Methods: In children with type I diabetes mellitus, level of vitamin D and HbA1C was measured. Patients with type I diabetes mellitus who had vitamin D deficiency (25OHD 9.9. This supplement transfer patients toward better glycemic control for the entire group (p-value < 0.0001). Conclusion: Vitamin D3 supplement improves HbA1C in pediatrics with type I diabetes mellitus and vitamin D deficiency. © 2015, Journal of Clinical and Diagnostic Research. All Rights Reserved

An etiologic evaluation of children with short stature in Gorgan (Northeast Iran), 2005

Growth is an important biological process during childhood. Short stature is the most common cause of a child to be examined by an endocrinologist. This cross-sectional study was performed to determine the short stature causes in children aged 6-14 years old in 2005 who were referred to Talghani Medical-Educational Center. Demographic characteristics, history of any serious problem (prematurity), clinical feature, biochemical and endocrinological test results and radiological findings were evaluated. Standard Deviation Score (SDS) was calculated and written down in an information recording form. From 100 children under study (66%) were girls with the average age of 10.84 year. Their average of bone age was 8.4 year. Most common causes for short stature were constitutional (57%), growth hormone deficiency (30%) and familial (8%). There was not significant difference between two sexes in this view. According to the findings, after ruling out of Constitutional and familial causes, we strongly recommended the provocative growth hormone test for early detection and timely prevention of permanent short stature

Epidemiological characteristics and incidence rate of brucellosis in Isfahan province, Iran, 2012

Background: Brucellosis is a common zoonotic disease, which spread from infected animals to humans .This study aimed to determine the epidemiological characteristics and incidence rate of brucellosis during 2012 in Isfahan province, Iran. Methods: This cross-sectional study assessed all the patients with diagnosis of brucellosis in Isfahan province during 2012. We used t and chi-square test for data analysis. The incidence rate was calculated based on per 100�000 of at-risk population. Findings: Totally, 575 patients with brucellosis were identified of which, 69.9 were men and 87.7 were from rural areas. Housewives-ranchers and children were the most and least at-risk individuals, respectively. The incidence of the disease was 11.13 per 100�000 of at-risk population in the province, 4.15 in male, 9.64 in women, 1.7 in urban areas and 12.9 per 100�000 of at-risk population ear in rural areas during 2012. In addition, there was significant association between the type of disease (new or recurrent) and county of residence and history of contact with animals (P < 0.05). Conclusion: The incidence of brucellosis in the Isfahan province was less than the national average, and this province classified to have very low incidence. In addition, there were clear differences in the geographical distribution of disease in the province. © Journal of Isfahan Medical School. All rights reserved

Epidemiological and clinical characteristics of patients with hydatid cysts in Khorasan Razavi Province, from 2011 to 2014

Background: This study aimed to investigate the epidemiological and clinical aspects of patients with hydatid cyst during 2011 to 2014. Methods: This cross-sectional study was conducted in Khorasan Razavi Prov-ince, the Northeast of Iran, from 2011 to 2014. The study population was all cases with hydatid cyst who diagnosed in governmental and private laboratories, hospitals and health centers (HC) in Khorasan Razavi Province during 2011-14. Results: The prevalence rate of hydatidosis was 1.44 per 100000 individuals. Of 357 cases, 54.9 were women, 40.3 rural, 45.8 housewives, and 3.4 were Afghan. The mean age of women was higher than that of men (39.13�18.9 compared to 34.7�17.9 yr, respectively, P-value=0.025). The highest proportion of cases (39.2) was in the age group of 21-40 yr old. Abdominal pain was re-ported in 42.3 of cases. Liver involvement was the most common localization of hydatid cyst reported in 59.4 of patients, and 8.4 had multiple organ in-volvement. The common diagnosis methods of the disease were radiology (42.3) followed by CT scan (37.8). 45.9 of patients had domestic dog and hygiene principles of washing the vegetables was adhered by 6.7 of patients. Conclusion: The prevalence of human hydatidosis, as a most important neglected disease, should be considered by health policy-makers in public health domain. In addition, educational programs to better recognition of the disease symptoms, and to identify the infection sources are needed in high risk group of population. � 2016, Tehran University of Medical Sciences (TUMS). All rights reserved

Trends of 28 days case fatality rate after first acute myocardial infarction in Isfahan, Iran, from 2000 to 2009

Background: The purpose of the present study was the analysis of the trends in case fatality rate of acute myocardial infarction (AMI) in Isfahan, Iran. This analysis was performed based on gender, age groups, and type of AMI according to the International Classification of Diseases, version 10, during 2000-2009. Methods: Disregarding the Multinational Monitoring of Trends and Determinants in Cardiovascular Disease (MONICA), this cohort study considered all AMI events registered between 2000 and 2009 in 13 hospitals in Isfahan. All patients were followed for 28 days. In order to assess the case fatality rate, the Kaplan-Meier analysis, and to compare survival rate, log-rank test were used. Using the Cox regression model, 28 days case fatality hazard ratio (HR) was calculated. Results: In total, 12,900 patients with first AMI were entered into the study. Among them, 9307 (72.10) were men and 3593 (27.90) women. The mean age in all patients increased from 61.36 ± 12.19 in 2000-2001 to 62.15 ± 12.74 in 2008-2009, (P = 0.0070); in women, from 65.38 ± 10.95 to 67.15 ± 11.72 (P = 0.0200), and in men, from 59.75 ± 12.29 to 59.84 ± 12.54 (P = 0.0170),. In addition, the 28 days case fatality rate in 2000-2009 had a steady descending trend. Thus, it decreased from 11.20 in 2000-2001 to 07.90 in 2008-2009; in men, from 09.20 to 06.70, and in women, from 16.10 to 10.90. During the study, HR of case fatality rate in 2000-2001 declined; therefore, in 2002-2003, it was 0.93 95% confidence interval (CI) = 0.77-1.11, in 2004-2005, 0.88 (95% CI = 0.73-1.04), in 2006-2007, 0.67 (95% CI = 0.56- 0.82), and in 2008-2009, 0.69 (95% CI = 0.56-0.82). Conclusion: In Isfahan, a reduction was observable in the trend of case fatality rate in both genders and all age groups. Thus, there was a 29.46% reduction in case fatality rate (27.17% in men, 32.29% in women) during the study period. © 2015, Isfahan University of Medical Sciences(IUMS). All rights reserved

Endocrine gland abnormalities in thalassemia major: A brief review

Thalassemia major (β-thalassemia) affects a significant segment of the population in certain areas of the world. Alterations in migration patterns have changed the geographic distribution of this disease and made it a worldwide health problem. Over the course of the past 2-3 decades hypertransfusion therapy has significantly increased the life expectancy, and improved the quality of life of these patients. At the same time there has been an increase in the frequency of complications of this therapy caused by iron overload. Endocrine gland abnormalities contributed little to the morbidity or mortality of β-thalassemia in the past. As a result of hypertransfusion therapy and increased longevity, however, endocrinopathies have become more common and contribute significantly to morbidity in these patients. In this article we briefly review the current understanding of endocrine gland abnormalities, primarily caused by iron overload, in patients with thalassemia major