فهرست مطالب negin rashidi

In the past decades, the development of human needs, climate changes, urbanization, and the rapid development of industry, agriculture, drought, floods, and soil erosion have caused watershed degradation. On the other hand, resources are used to exploit natural resources. An imbalance in the functioning of watersheds causes various hydrological, ecological, economic, and social functions to face various problems and reduce the watershed health and associated functions. A healthy watershed plays an essential role in ensuring the stability of socio-economic systems and improving human well-being. Due to their complexity, they should be restored and controlled through ecological risk assessment to ensure their restoration and effective management. Therefore, comprehensive watershed management is vital to maintaining the health and sustainability of natural resources and watersheds.

Watersheds as socio-ecological systems have management complexities due to the interaction between the components of ecosystems, the types of activities carried out in them, and the dynamics of these systems. Hence, it is necessary to consider different watershed management approaches to conserve watershed services appropriately. Towards that, the Watershed Management Ladder (WML) consists of three main approaches: non-integrated (fragmented) watershed management, integrated watershed management, and comprehensive watershed management. It is being employed to recognize the position of the watershed in the study ladder. In this research, a field visit to the region was first conducted to draw a conceptual model according to the goals, visions, and missions of the stakeholders. The detailed implementation studies of the Fakhran Watershed were then comprehensively reviewed with the primary goal of evaluating the management position of the Fakhran Watershed in the watershed management ladder. In this regard, at first, the management approaches of the ladder were explained. Then, each approach was investigated according to the detailed implementation studies of the study watershed. On the other hand, since each watershed is placed on the rungs of this ladder according to the conditions and research carried out, brief solutions necessary to move to higher rungs in the Fakhran Watershed were also presented.

The non-integrated watershed management approach, interdisciplinary sub-approaches, and watershed approach have been carried out based on the studies conducted in this watershed. The research results in Iran indicated that non-integrated watershed management approaches, integrated watershed and comprehensive management of watersheds, and the place of watersheds in WML are yet to be evaluated. Therefore, the current research discusses the position of the Fakhran Watershed in Iran’s South Khorasan in WML. Nonetheless, the implementation-research approach, including health and sustainability assessment, which is one of the essential aspects of this approach, has to be studied in the watershed. In this regard, in the studies of the Fakhran Watershed, the scale of the watershed has been considered to solve hydrological and ecological problems, and the watershed approach has been taken into account in this watershed. The next step of this approach is the implementation-research step, but the plans are implemented again based on the guidelines that still need to be evaluated and updated. So, success at different levels of management in watersheds requires having appropriate knowledge in explaining processes and dealing with various events in watersheds, which is a departure from the current conditions and evokes health in performance and sustainability in providing watershed services. Accordingly, in addition to indigenous knowledge, modern science is influential in empowering communities and moving toward sustainable development. It can be used in the comprehensive management of watersheds and other knowledge. The Fakhran Watershed is, therefore, placed in the third rung of the non-integrated watershed approach.

A significant part of these deficiencies and the need for the placement of the studies of this watershed in the higher rungs of WML are towards the description of public services and similar and common existing syllabi for the developmental and implementation projects. It confirms the necessity of revisiting the description of goal-oriented and problem-oriented services in the developmental and implementation projects. Accordingly, watershed officials and policymakers should use new scientific and community-oriented approaches in line with the changing social, economic, cultural, and managerial needs to take up the watershed management position to the upper rungs of WML.

In this article, the thermal performance of microchannel heat sink containing a suspension of phase change materials with a porous elliptical cross-section has been investigated. Solving the basic equations governing the problem is based on the finite element method and the simulation is done using Comsol multiphysics software 5.6. ForschheimerBrickman-Darcy equations are used to describe the flow through the porous medium. In the present work, the analysis of the arrangement of porosity (ε) and the thickness of the porous area has been done on the thermal and hydraulic characteristics under different inlet velocities. The increase in the small diameter of the ellipse causes a decrease in the diameter of the porous section and the pressure drop decreases with the increase of the fluid inlet speed, so that at b = 0.275 mm and uin= 2 m/s, the pressure drop compared to b = 0.175 mm is 62.34 % decreased and the thermal resistance increased by 35.50 % At low inlet velocities, the coefficient of performance is less than 1, and the reason for this is the decrease in the momentum of the fluid elements due to the presence of the porous wall, and with the increase in speed, the coefficient of performance is greater than 1, because the increase in momentum and also the increase in the contact surface between the fluid and the solid matrix cause The thermal performance has been improved and this indicates the superiority of the porous microchannel heat sink compared to the microchannel heat sink without porous medium.

In the present paper, heat transfer in a cavity containing a mixture of water + phase change materials surrounded by nanoparticles is investigated. The left and right walls are fixed at hot and cold temperatures, respectively, and horizontal walls are assumed to be adiabatic. There is a circular rotating cylinder in the center of the hole that can rotate clockwise or counterclockwise. The problem is considered two dimensional and fundamental governing equations such as continuity, momentum, and energy are solved in a coupled manner utilizing the finite element method (FEM). To check the accuracy of the numerical results, a comparison with the outputs of others is provided, which indicates a very good agreement of the results. The parameters studied in this study are: dimensionless radius of the cylinder (R), Rayleigh number (Ra), dimensionless melting temperature of the phase change material (θfu), Stephan number (St) and dimensionless angular velocity of the rotating cylinder (Ω). By increasing the dimensionless radius of the cylinder from R = 0.1 to R = 0.4 Ω = -300, the heat transfer rate enhances by 23.37%. On the other hand, with R = 0.4 and considering no-rotation case, the heat transfer rate will decrease by about 59.7% compared to the cavity without the cylinder. Which indicates the importance of rotation of the cylinder inside the cavity in the heat transfer rate enhancement.

White blood cell count (WBC) is one of the objective parameters of systemic inflammation. The aim of present study was to evaluate the relationship between WBC count and metabolic syndrome.

In this study on Lor population in Borujerd province (West of Iran), from 2011 to 2013, 800 persons were enrolled. MetS was defined based on ATP III criteria. Differences among the quartiles of WBC were examined by one-way analysis of variance.

Only 14.7% did not have any of the five components and 43% of all subjects had metabolic syndrome. The means of WBC count in MetS group were significantly higher than the control group (p<0.0001). In subjects without any MetS components, the means of WBC was 5.321 /µL, and it was 5.664, 5.714, 5.961, 6.302, and 6.572 /µL in subjects with 1, 2, 3, 4, and 5 components, respectively. These differences show a significant increasing trend (p<0.0001).

WBC count was associated with clustered components of metabolic syndrome. It seems that WBC counts could be considered as a predictive factor for metabolic syndrome in preventive medicine.a

There is limited information on the relationship between metabolic syndrome (MetS) and chronic kidney disease (CKD) in the Iranian population, a group that has a high prevalence of CKD and obesity. The aim of present study was to determine the relationship between MetS and CKD in West of Iran. A total of 800 subjects aged more than 35 years admitted from 2011 to 2013 were enrolled in the study. MetS was defined based on the Adult Treatment Panel III criteria, and CKD was defined from the Kidney Disease Outcomes Quality Initiative practice guidelines. Waist circumference and body mass index were calculated, as well, blood samples were taken and lipid profi le, plasma glucose levels, and serum creatinine were measured. Data were analyzed with SPSS version 17 (SPSS Inc., Chicago, IL, USA). CKD was seen in 14.8% patients with MetS and 8.3% individuals without MetS. MetS was associated with an increased odds ratio (OR) for a glomerular fi ltration rate <60 ml/min/1.73 m2(OR: 1.91; 95% confi dence interval [CI]: 1.22-2.99; P = 0.004). Individuals with 2, 3, 4, and 5 components of the MetS had an increased OR for CKD: 2.19 (95% CI: 0.95-3.62), 2.65 (95% CI: 1.03-4.71), 2.86 (95% CI: 1.08-5.53), and 5.03 (95% CI: 1.80-8.57), respectively,compared with individuals with none of the components. We found a high prevalence of CKD in patients with MetS compared with the subject without MetS. Our observations raised major clinical and public health concerns in Iran, where both the MetS and kidney diseases are becoming common.

There is evidence that inflammation may be involved in pathogenesis of MetS. Inflammatory biomarkers are moving to the forefront as the potent predictors of MetS.. The present study aimed to evaluate the association between MetS and some inflammatory biomarkers..Patients and This community-based cross-sectional study was conducted on 800 subjects aged above 35 years selected through random sampling in Borujerd (west of Iran) from 2011 to 2013. MetS was defined based on ATP III criteria and the subjects were divided into two groups (MetS and non-MetS groups). Waist circumference and Body Mass Index (BMI) were calculated. In addition, blood samples were taken and C-Reactive Protein (CRP), lipid profile, Fasting Blood Sugar (FBS), and Bleeding Time (BT) were measured. Then, the correlations between MetS and the above-mentioned variables were estimated. After all, the data were entered into the SPSS statistical software (v. 17) and analyzed using T-test, chi-square, median test, and spearman’s rank correlation.. In this study, 344 subjects (43%) met the ATP III criteria. The results showed a significant difference between MetS and non-MetS groups regarding BMI, white blood cell, total cholesterol, LDL, platelet, and high-sensitivity CPR (hs-CRP) (P < 0.0001, P = 0.040, P < 0.0001, P < 0.0001, and P = 0.045, respectively). Besides, waist circumference, Triglyceride (TG), FBS, and systolic and diastolic blood pressure were significantly higher, while HDL was significantly lower in the MetS group (P < 0.0001).. The incidence rate of MetS in our survey was higher compared to the previous reports. In addition, this incidence rate was higher in females in comparison to males. The results also showed a significant correlation between inflammatory biomarkers and MetS and that the higher levels of hs-CRP were associated with higher rate of MetS..

Bleeding time (BT) is the oldest and simplest test for assessing the platelets (Plts) function. BT can affect by several factors such as race and diet, which has a wide reference range. The aim of this project is to determine the normal range of BT in Borujerd city. Determining the normal range of BT can help us to modify the definition of bleeding disorder and aspirin resistance. This was cross-sectional study carried out in 2011-2012. Subjects with a history of coagulation disorders or a positive family history of coagulation disorders, consumption of anti-Plts, anti-histamines, and phenotiazines in the previous month and subject with Plt less than 150,000 were excluded. The samples were 505 volunteers who were referred from 16 urban and 9 rural clusters to research center. BT of the samples was determined according to Ivy simplate method considering national standard protocol in the selected persons. Normal range was calculated as mean ± 2 standard deviation. Of 505 volunteers, 50.4% were female. The range of BT was 2.8-2.95 min with mean of 2.79 ± 0.78 min. Range and mean of BT in women was 2.83-3.06 min and 2.88 ± 0.87 min, and range and mean of BT in men was 2.7-2.9 min and 2.69 ± 0.67 min; this difference was significant (P = 0.012). BT in urban and rural participants was 2.78 ± 0.79 and 2.77 ± 0.73 min. There was no significant difference between BT in urban and rural participants. The normal range of BT in Boroujerd was in the lower limit of the normal universal range. In this study, BT was significantly different in both genders, but its correlation with age, blood group, and place of residency was not significant.

The present study assessed the real life therapeutic effects of weekly doses of alendronate in treating a group of osteoporotic patients in Iran. The present historical cohort was conducted on patients who had undergone two or more bone mineral densitometry within an interval of 1.5-2 years in Shariati Hospital bone mineral density department between 2002 and 2010.patients were asked by phone about consumption of alendronate. The mean increase in the BMD values at different sites was calculated. There was a significant increase in the body mass index (BMI) values of both the individuals taking alendronate and the control group (P<0.001). Taking the weekly dosage of the drug was associated with a 7.67% increase in the BMD values at the femoral neck, 8.68% at the total hip, and 3.17% at the lumbar spine. Moreover, our results showed a significant difference between the height decline in the two groups (alendronate taking: 0.7±2.4 vs. control: -0.7±2.6, P<0.001). Comparing the results of the present study with that of previous ones revealed the drug is beneficial in improving bone mineral density in Iranians; as well alendronate is more effective in Iranian postmenopausal women when compared with the Americans.

Bleeding time test is used to assess the function of platelets in human body. The aim of this project was thus to estimate the sample size required to determine the normal range of bleeding time (BT) in Borujerd (a city in Iran). A pilot study was designed to determine the range of normal BT in a small group of normal people. The total sample size for the next study was then calculated according to the results. In order to determine the sample size، a total of 33 volunteers participated in this study. The normal range of BT was determined by Ivy method. Written informed consents were obtained from all participants and their clinical history was recorded. The sampling was performed once for each participant. However، the results were interpreted by two observers. The study protocol was approved by the Ethics Committee of the research center at Lorestan University of Medical Sciences (Iran). In this study، 33 normal participants (20 women and 13 men) were divided into four age groups of 35-44، 45-54، 55-64 and over 64 years old. Maximum and minimum BTs in men were 209 (in the age group of 35-44 years) and 150 seconds (in the age group of over 64 years)، respectively. On the other hand، the corresponding values in women were 194 (in 55-64 year-old subjects) and 145 seconds (in women over 64 years of age). Considering the aforementioned results، the total sample size for the next study was determined to be 580 normal subjects by two-sample t-test power analysis at a power of 0. 91816. There was a significant difference between the normal range of BT in participants of Borujerd and previously recorded range in other studies. Moreover، normal BT in men decreased by aging. This study did not show any special order in increasing or decreasing BT in women.

Fibrinolytic therapy is the standard therapeutic method for patients with acute myocardial infarction (AMI). This study endeavored to assess the delay in arrival to the emergency department and door to needle time for thrombolytic therapy. This study was conducted on 80 patients with AMI whom referred to our clinic from January 2009 to January 2010. We measured time of arrival, needle time and door to needle time for all patients. Moreover, the relations of these times to some variables such as age, gender and the referred shift of emergency department personnel were calculated. A total of 80 patients, 62 (77.5%) male and 18 (22.5%) female were evaluated for thrombolytic therapy. The arrival time of overnight shifts was 14.59 ± 1.23 minutes shorter than other shifts. The median door to needle time was 46.56 minutes and the mean time of the onset of chest pain to arrival at the emergency department was 19.44 minutes. Seventy-two patients (90%) received fibrinolytic therapy within the first 30 minutes of arrival. The needle time was significantly longer in the night shift (P < 0.05) (between 8 to 14 minutes), while the time of receiving Streptokinase therapy in the other shifts was not meaningfully different. Finally there was a statistically significant difference between the referred shifts and needle time (P < 0.05). Despite our good results for door to needle time, to improve and attain the gold standard’s limits in administering fibrinolytic therapy, improvement of policies like training the personnel to shorten this time is recommend.