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Search Results: 1 - 10 of 145 matches for " Fahimeh Sehati Shafayi "
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A Comparison of Physical Activity and Nutritional Practices in Hypertensive and Non- hypertensive Pregnant Women
Fahimeh Sehati Shafayi,Maryam Akef,Homayoon Sadegi,Akram sallakh Niknazhad
Journal of Cardiovascular and Thoracic Research , 2012,
Abstract: Introduction: Hypertension is the most common medical problem affecting pregnant women during pregnancy contributing to one third of substantial maternal mortality and varieties of fetal and neonatal health problems, while representing health status of a society. This study aimed to investigate the links between a healthy life style and developing hypertension during pregnancy in order to improve healthier behaviors.Methods: In a case-control study from October 2009 to April 2010, physical activity and nutritional practices of two groups of pregnant women (220 in each group) with gestational age of 20 weeks or more, single pregnancy, without any previous medical disorders were compared. Samples in case group had pregnancy induced hypertension. Data were collected using a two-part questionnaire after obtaining informed written consents from mothers before enrollment; later the data were analyzed using the SPSS 13 and Stata software. Results: Women in two groups did not differ regarding their socioeconomic characteristics. There were no significant differences in nutritional practices and level of physical activity in pregnant women of study groups; mean score of physical activity was 54.6±14.8 in test and 57.3±15.0 in control group (P=0.06) and it was 72.9±10.3 and 73.719.5 about nutritional habits in test and control group respectively. Mean pre-pregnancy BMI was higher in case group (P=0.02); these women also had a higher percentage of previous prenatal mortality and history of hypertension.Conclusion: Results state that health during pregnancy is relevant to healthy life style especially preconceptional period; therefore employing proper strategies to improve women knowledge and attitude of the important dimensions of healthy life considering good and healthy diet and active life seem to solve the problem; this needs to unite all health workers to set proper educational programs and courses and support of health policy makers.
NUM-Based Rate Allocation for Streaming Traffic via Sequential Convex Programming
Ali Sehati,Mohammad Sadegh Talebi,Ahmad Khonsari
Mathematics , 2011,
Abstract: In recent years, there has been an increasing demand for ubiquitous streaming like applications in data networks. In this paper, we concentrate on NUM-based rate allocation for streaming applications with the so-called S-curve utility functions. Due to non-concavity of such utility functions, the underlying NUM problem would be non-convex for which dual methods might become quite useless. To tackle the non-convex problem, using elementary techniques we make the utility of the network concave, however this results in reverse-convex constraints which make the problem non-convex. To deal with such a transformed NUM, we leverage Sequential Convex Programming (SCP) approach to approximate the non-convex problem by a series of convex ones. Based on this approach, we propose a distributed rate allocation algorithm and demonstrate that under mild conditions, it converges to a locally optimal solution of the original NUM. Numerical results validate the effectiveness, in terms of tractable convergence of the proposed rate allocation algorithm.
Acta Medica Iranica , 1985,
Abstract: The use o f a smal l dose of Neostigmine during i nduction of anesthesia provides many valudable clinical manifestation which have been discussed in detail . I believe this method of anesthesia might be desirable in emergency situations and whenever the ventilator is not avai labl e .
Formulation, Preparation and Evaluation of Low-Cost Extrude Products Based on Cereals and Pulses  [PDF]
Mohammad Reza Shadan, Kavita Waghray, Fahimeh Khoushabi
Food and Nutrition Sciences (FNS) , 2014, DOI: 10.4236/fns.2014.514145
Abstract: Protein-energy malnutrition among children is the major health challenges and it may be related to low nutritional quality of traditional complementary foods and high cost of quality protein-based complementary foods. The aim of this study was formulation, preparation and evaluation of low-cost extruded products based on cereals and pulses. Composite flours were prepared using cereals and pulses, then formulated and extruded by a twin screw extruder in Osmania University, Hyderabad, India. Data were analyzed by SPSS software. Results showed: the protein contents of extruded formulas B, D and F were in the highest values. Carbohydrate in the extruded formula A was significantly higher than others. The lowest amount of ash and crude fiber were observed in the formula A. Content of energy in the extruded formulas E, F and C was higher; mean (SD) of Fe content in the extruded formula B, D and F was in the higher ranks among others. Calcium content in the extruded formulas C, E and F was in the highest amounts. Magnesium content in the extruded formulas B, D and F was higher than others. Cu content in the extruded formula C, D, B and F was higher than others. Manganese content in the extruded formulas B, C and F, and zinc content in the formulas B, D and F were higher than others. Tap density showed the lowest amount in the formula B, D and F, while their bulk density was higher. WHC was in the highest amount in the extruded formula A, while WSI in the extruded formula B, D and followed by F was in the highest amount. The mean scores of sensory evaluation of extruded products F showed that this combination has significantly better colour, flavour, texture and overall acceptability than others.
An Assessment of Temporal and Spatial Distribution of Thunder Storms in Iran  [PDF]
Gholam Abbas Fallah Ghalhari, Fahimeh Shakeri
Journal of Geographic Information System (JGIS) , 2015, DOI: 10.4236/jgis.2015.72009
Abstract: The main purpose of this study is to investigate temporal and spatial distribution of thunderstorm frequency in Iran. In order to do study, observed statistical data of the present weather codes of thunderstorm (17, 29, 91 - 99) in 50 synoptic stations around the country were used in a 35 years statistic period (1979-2013). The results of the study showed that the phenomenon occurs mostly in southwest, west and northwest regions of Iran. Thunderstorm occurrence reduces when moving toward east. Maku station in northwest of Iran shows the maximum thunderstorm frequency during the statistical period (mean annual of 31). Jask station in southern Iran (mean annual of 2) has shown minimum thunderstorm occurrence during the statistical period. In the eastern regions of Iran, Torbat Heydarieh station revealed higher frequency than the other stations which was because of high mountains like Qaenat. In terms of temporal distribution, spring showed the highest frequency of the phenomenon. In monthly scale, the maximum frequency of hail downfall happens in April and May. In hourly scale, the maximum occurrence of thunderstorm observed at 12 - 18 p.m. for UTC time.
The Role of Ecotourism Potentials in Ecological and Environmental Sustainable Development of Miankaleh Protected Region  [PDF]
Fahimeh Seifi, Gholam Reza Janbaz Ghobadi
Open Journal of Geology (OJG) , 2017, DOI: 10.4236/ojg.2017.74033
Abstract: Protected areas are considered as suitable environments for tourism development where the performance of tourism, consumer, and economic activities consistent with each region based on total management plan provides the context for sustainable tourism development. Therefore, the aim of the present study1 was to explore the role of ecotourism potentials in the environmental development of Miankaleh Protected Region using a descriptive, analytical, survey method. It also aimed to examine factors affecting sustainable tourism development in the region under study. The data were collected using documentation and library techniques, field methods, questionnaires, note taking, observation, and conducting interviews with people, tourists, and authorities in charge of ecotourism development. The research population included people living in Noushahr, of whom 384 families, 30 experts, and 100 tourists were selected as the respondents in the research sample using Cochrane formula. The collected data were analyzed using descriptive and inferential statistics, and Spearman test through SPSS. The results of the study showed that there was a significant relationship between ecotourism potentials, environmental, economic and sociocultural development in the region under study.
Content-Aware Rate Control for Video Transmission with Buffer Constraints in Multipath Networks
Mohammad Hassan Hajiesmaili,Ali Sehati,Ahmad Khonsari,Mohammad Sadegh Talebi
Computer Science , 2011,
Abstract: Being an integral part of the network traffic, nowadays it's vital to design robust mechanisms to provide QoS for multimedia applications. The main goal of this paper is to provide an efficient solution to support content-aware video transmission mechanism with buffer underflow avoidance at the receiver in multipath networks. Towards this, we introduce a content-aware time-varying utility function, where the quality impacts of video content is incorporated into its definition. Using the proposed utility function, we formulate a multipath Dynamic Network Utility Maximization (DNUM) problem for the rate allocation of video streams, where it takes into account QoS demand of video streams in terms of buffer underflow avoidance. Finally, using primal-dual method, we propose a distributed solution that optimally allocates the shared bandwidth to video streams. The numerical examples demonstrate the efficacy of the proposed content-aware rate allocation algorithm for video sources in both single and multiple path network models.
ACS-TS: train scheduling using ant colony system
Keivan Ghoseiri,Fahimeh Morshedsolouk
Advances in Decision Sciences , 2006, DOI: 10.1155/jamds/2006/95060
Abstract: This paper develops an algorithm for the train scheduling problem using the ant colony system metaheuristic called ACS-TS. At first, a mathematical model for a kind of train scheduling problem is developed and then the algorithm based on ACS is presented to solve the problem. The problem is considered as a traveling salesman problem (TSP) wherein cities represent the trains. ACS determines the sequence of trains dispatched on the graph of the TSP. Using the sequences obtained and removing the collisions incurred, train scheduling is determined. Numerical examples in small and medium sizes are solved using ACS-TS and compared to exact optimum solutions to check for quality and accuracy. Comparison of the solutions shows that ACS-TS results in good quality and time savings. A case study is presented to illustrate the solution.
Voltammetric Determination of Captopril Using Chlorpromazine as a Homogeneous Mediator
Hossein Bahramipur,Fahimeh Jalali
International Journal of Electrochemistry , 2011, DOI: 10.4061/2011/864358
Abstract: Chlorpromazine was used as a homogeneous electrocatalyst in the oxidation of captopril. The anodic peak current of chlorpromazine was increased substantially in the presence of low concentrations of captopril (pH 4). Cyclic voltammetry and chronoamperometry were used to study the kinetics of the catalytic electron transfer reaction. The values of electron transfer coefficient ( ) and catalytic rate constant ( ) were estimated to be 0.34 and , respectively. Linear sweep voltammetry was used for the determination of captopril in the presence of chlorpromazine. A linear calibration curve was obtained in the concentration range of captopril of 10.0–300.0?μM, with a limit of detection of 3.65?μM. The relative standard deviation (RSD%) for 5 replicate measurements of captopril (100?μM) was 1.96%. The method was applied to the determination of captopril in pharmaceutical formulations and blood serum samples with satisfactory results. 1. Introduction Captopril (CAP), 1-(3-mercapto-2-D-methyl-1-oxopropyl) proline (Scheme 1(a)), is an oral drug and a member of a class of drugs called angiotensin-converting enzyme (ACE) inhibitors. CAP has been widely used as antihypertensive drug and to moderate heart failure [1]. It normally works by lowering blood levels of angiotensin enzyme, to help relax the blood vessels and lower blood pressure. Relaxing the arteries, and as a consequence lowering of blood pressure, improves the pumping efficiency of a failing heart and improves cardiac output in patients with heart failure [2]. CAP with a thiol functional group may also act as a scavenger of free radicals in living systems [3–5]. Scheme 1: Chemical structures of (a) captopril and (b) chlorpromazine. Several methods have been applied to the determination of CAP, including high-performance liquid chromatography [6–9], gas chromatography [10, 11], spectrophotometry [12, 13], fluorimetry [14–16], radioimmunoassay [17], chemiluminescence [18–20], atomic absorption spectrophotometry [21], Raman spectroscopy [22], capillary electrophoresis [23, 24], and electrochemical methods [25–30]. Direct electrochemical determination of pharmaceutical compounds has a number of limitations, such as low sensitivity and reproducibility, slow electron transfer kinetics, and high overpotentials. The chemical modifications with redox active materials (homogenous and heterogeneous catalysts) offer significant advantages in the design and development of electrochemical sensors. During the reaction, the mediator shuttles electrons between the analyte and the electrode with significant reduction in
Effects of sterol regulatory element-binding protein (SREBP) in chickens
Fahimeh Alipour, Ahmad Hassanabadi
Lipids in Health and Disease , 2012, DOI: 10.1186/1476-511x-11-20
Abstract: Sterol regulatory element binding proteins (SREBP) are basic helix-loop-helix-leucine zipper (bHLH-Zip) transcription factors that play an important role in controlling genes involved in the biosynthesis of cholesterol and fatty acids [1]. The SREBP precursors of about 1150 amino acids in length need cleavage by a sterol-dependent proteolytic process [2]. The N-terminal part (about 450 amino acids, having the bHLH-Zip motif and the transcription activating domain) is then released into the nucleus, where the transcriptional activation of the target genes occurs. SREBPs are synthesized while inactive precursor proteins that are embedded in endoplasmic reticulum membranes [3,4]. To become transcriptionally active, precursor SREBP is escorted to the Golgi apparatus, where it undergoes a sequential 2-step proteolytic cleavage catalyzed by site-1 protease and site-2 protease [5]. Therefore, two SREBPs, designated SREBP-1 and -2, have been isolated and cloned from several mammalian species [6,7]. The SREBP-1 gene generates two isoforms SREBP-1a and -1c, by another transcription start sites [8].This procedure releases an amino-terminal SREBP fragment that is referred to as the mature form. Mature SREBP is transported into the nucleus, wherever it binds sterol regulatory elements (SRE) of genes involved in biosynthesis of lipid. Three isoforms of SREBP have been identified in mammals. Two of these isoforms, designated SREBP-1a and SREBP-1c, are expressed from the same gene. They vary in sequence at their amino termini by reason of utilize of alternative promoters and leading exons. The third isoform, designated SREBP-2, is expressed from a separate gene. SREBP-1c and SREBP-2 are the major isoforms of SREBP expressed in mammalian liver [5]. Several studies recommend that the SREBP-1 isoforms are more selective in activating fatty acid biosynthesis genes, while SREBP-2 is more specific for controlling cholesterol biosynthesis. These researches include on hepatic lipogenic gen
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