Magnetohydrodynamic Viscous Flow Over a Shrinking Sheet With Second Order Slip Flow Model

In this paper, we investigate the magnetohydrodynamic viscous flow with second order slip flow model over a permeable shrinking surface. We have obtained the closed form of exact solution of Navier-Stokes equations by using similarity variable technique. The effects of slip, suction and magnetic parameter have been investigated in detail. The results show that there are two solution branches, namely lower and upper solution branch. The behavior of velocity and shear stress profiles for different values of slip, suction and magnetic parameters has been discussed through graphs.Comment: 13 Pages, 8 Figures. Accepted for Publication in Heat Transfer Researc

The Status of the Surveillance System of Groups at Risk of Tubercolosis in Iran: AQualitative Study

Background: In order to achieve a dynamic surveillance system for the groups at risk of tuberculosis and to improve its quality, investigating its various aspects and benefiting from the opinions of the experts and experienced individuals in this field are very important. Hence, the objective of this study was to explore the status of the surveillance system for the groups at risk of tuberculosis in Iran. Methods: Data collection was carried out via interviews with 17 experts in the tuberculosis control program of Iran. In order to evaluate the validity and reliability of data, four criteria of credibility, transferability, dependability and confirmability were used. Frame analysis was used for data analysis. Results: Based on the interviewee's opinions, twelve major groups at risk of tuberculosis and seven challenges in the surveillance system were identified. For the majority of these at risk groups, there is no structured program and the status of case finding and treatment is similar to the public population. For some others (HIV/ AIDS patients, prisoners and people at exposure), there is a program, but its effectiveness is uncertain. Conclusion: Results indicate that groups at risk of tuberculosis are widespread and access to some of them is difficult; hence, these groups are the main challenges of the tuberculosis control program in Iran

Does Tuberculosis Have a Seasonal Pattern among Migrant Population Entering Iran?

Background: There are few quantitative documents about the seasonal incidence of tuberculosis (TB) among immigrant populations. Concerning the significant role of recognizing seasonal changes of TB in improving the TB control program, this study determines the trend and seasonal temporal changes of TB among immigrants entering Iran. Methods:In this longitudinal study, data from the Iranian TB register Program (from 2005 to 2011) was used. The aggregated number of monthly and seasonal TB cases was obtained by adding the daily counts. Data was analyzed by Chi-square, Independent T-test, ANOVA, and Poisson regression using Stata 11 and SPSS 20 software. Results: Among 74,155 registered patients with TB, 14.3% (10,587) were non-Iranian who had immigrated to Iran from 29 different countries. The highest aggregated number of seasonal and monthly incidence of TB in immigrants was observed in spring (2824, P= 0.007) and in May (1037, P< 0.001). The number of non-Iranian patients with TB increased significantly over the years (β= 0.016, P= 0.001). Conclusion: This study shows that immigrants constitute a significant portion of TB patients recorded in Iran and this trend is increasing. Also, the peak incidence of this disease is the second month of the spring

Comparative study of cognitive factors in obsessive- compulsive, generalized anxiety, and major depression disorders

Background and aims: With attention to considered various cognitive factors in psychopathology of obsessive- compulsive disorder, generalized anxiety disorder, the aim of this study was comparison of Thought Action Fusion (TAF), responsibility and the overestimation of threat (RT), and over importance and Control Thoughts (ICT), Perfectionism and The Intolerance of Uncertainty (PC) cognitive beliefs in Obsessive- Compulsive Disorder (OCD), Generalized Anxiety Disorder (GAD), Major Depression Disorder (MDD) and normal group to more clarification psychopathology of these disorders. Methods: This study is causal-comparative research. The clinical samples include patients referred from January to June 2016 to Sari Shahid Zareh hospital in this regard. From each of these groups, 30 individuals were selected from hospitals and clinics of Sari and 30 individuals were selected accomplish obsessive beliefs questionnaire and thought action fusion scale. Data were analyzed by MANOVA. Results: The results of MANOVA and Tukey posthoc test showed that OCD group was significantly higher than other groups in TAF, RT and ICT (P0.086). Also, the results showed that all of these cognitive beliefs OCD and GAD groups were significantly higher than depression and normal groups (P<0.001). Conclusion: According to these results, it seems that TAF, RT and ICT are more specific for OCD, but about PC there isn’t this specialty and it is common cognitive vulnerability in OCD and GAD

Application of a monopole sensor for rapid in situ water quality assessment: theoretical analysis

This initial study proposes a rapid and cost effective in situ water quality assessment based on reflection coefficient of a 1.749 cm long bare monopole senor. The reflection coefficient of the monopole sensor in air, water and ethanol were studied from measurement and calculations of Finite Element Method (FEM). FEM was used to calculate the reflection coefficient of the sensor in water/ethanol mixture solution

Arsenic Induced Toxicity in Broiler Chicks and Its Amelioration with Ascorbic Acid: Clinical, Hematological and Pathological Study

This study was conducted to observe the arsenic (As) toxicity lesions in birds and to know either Vit C ameliorates these toxic effects or not. One-day-old broilers chicks (n=72) procured from a local hatchery were randomly divided into four equal groups. First group was kept as control and second group was given As (50 mg/kg BW) via crop tubing. Third group received in addition to As, Vit C (250 mg/kg BW) whereas fourth group received only Vit C. Killing by neck dislocation of randomly selected six birds from each group was carried out on experimental days 0, 16 and 32 for collection of blood and tissues specimens. Arsenic treated birds showed clinical signs of toxicity throughout the experiment than all other groups. These clinical signs included decreased body weight and feed intake, dullness, open mouth breathing, increased thirst, ruffled feathers, pale comb, skin irritation and watery diarrhea which were not significant in any other group. As treated group showed a significant (P<0.05) decrease in hematological parameters. Severe gross and histopathological changes were observed in intestines, spleen and lungs of birds fed with As than all other groups. Decreased height of villi of middle portion of small intestines was also observed in As treated birds. Villi height in Vit C treated group increased as compared to control group. It was concluded that As induces severe toxic effects in broiler birds; however, these toxic effects can be partially ameliorated by Vit C

Structural Health Monitoring (SHM) and Determination of Surface Defects in Large Metallic Structures using Ultrasonic Guided Waves

Ultrasonic guided wave (UGW) is one of the most commonly used technologies for non-destructive evaluation (NDE) and structural health monitoring (SHM) of structural components. Because of its excellent long-range diagnostic capability, this method is effective in detecting cracks, material loss, and fatigue-based defects in isotropic and anisotropic structures. The shape and orientation of structural defects are critical parameters during the investigation of crack propagation, assessment of damage severity, and prediction of remaining useful life (RUL) of structures. These parameters become even more important in cases where the crack intensity is associated with the safety of men, environment, and material, such as ship’s hull, aero-structures, rail tracks and subsea pipelines. This paper reviews the research literature on UGWs and their application in defect diagnosis and health monitoring of metallic structures. It has been observed that no significant research work has been convened to identify the shape and orientation of defects in plate-like structures. We also propose an experimental research work assisted by numerical simulations to investigate the response of UGWs upon interaction with cracks in different shapes and orientations. A framework for an empirical model may be considered to determine these structural flaws