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Search Results: 1 - 10 of 4874 matches for " Fakhereh Md. Esmaeili "
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Anisotropic Behavior of Cosmological Models with Exponential and Hyperbolic Scale Factors  [PDF]
Fakhereh Md. Esmaeili
Journal of High Energy Physics, Gravitation and Cosmology (JHEPGC) , 2018, DOI: 10.4236/jhepgc.2018.42017
Abstract: In this paper, the cosmological models of the universe are constructed in \"\" gravity with choice of the functional \"\" in the form \"\"?and \"\" . The space-time considered here is Bianchi Type I and the energy momentum tensor is in the form of perfect fluid. Two cosmological models are presented using a power form of exponential function and a hyperbolic form. The energy conditions along with the state finder diagnostic pair have been obtained and analyzed.
Dynamics of Bianchi I Universe in Extended Gravity with Scale Factors  [PDF]
Fakhereh MD. Esmaeili
Journal of High Energy Physics, Gravitation and Cosmology (JHEPGC) , 2018, DOI: 10.4236/jhepgc.2018.44040
Abstract: In this paper, the dynamical behavior of an anisotropic universe in an extended gravity e.g. the f (R,T ) theory of gravity is studied. We use f (R,T ) = R + 2μT , where R is the Ricci scalar, T is the trace of energy-momentum tensor and μ is a constant. Two cosmological models are constructed using the power law expansion and hybrid law cosmology in Bianchi type I universe, where the matter field is considered to be a perfect fluid. It is found that in both the cases the anisotropic behavior is in agreement with the observational results. The state finder diagnostic pair and energy conditions are also calculated and analyzed.
Simulation of Dynamic Response of Small Wind-Photovoltaic-Fuel Cell Hybrid Energy System  [PDF]
Saeid Esmaeili, Mehdi Shafiee
Smart Grid and Renewable Energy (SGRE) , 2012, DOI: 10.4236/sgre.2012.33027
Abstract: Renewable energy systems are of importance as being modular, nature-friendly and domestic. Among renewable energy systems, a great deal of research has been conducted especially on photovoltaic effect, wind energy and fuel cell in the recent years. This paper describes dynamic modeling and simulation results of a small wind-photovoltaic-fuel cell hybrid energy system. The hybrid system consists of a 500 W wind turbine, a photovoltaic, a proton exchange membrane fuel cell (PEMFC), ultracapacitors, an electrolyzer, a boost converter, controllers and a power converter that simulated using MATLAB solver. This kind of hybrid system is completely stand-alone, reliable and has high efficiency. In order to minimize sudden variations in voltage magnitude ultracapacitors are proposed. Power converter and inverter are used to produce ac output power. Dynamics of fuel-cell component such as double layer capacitance are also taken into account. Control scheme of fuel-cell flow controller and voltage regulators are based on PID controllers. Dynamic responses of the system for a step change in the electrical load and wind speed are presented. Results showed that the ability of the system in adapting itself to sudden changes and new conditions. Combination of PV and wind renewable sources is made the advantage of using this system in regions which have higher wind speeds in the seasons that suffers from less sunny days and vice versa.
Effectiveness Life Review on Life Satisfaction among Adolescents under the Supervision of Qazvin Well-Being Center  [PDF]
Masoomeh Esmaeili, Ahmad Usefynezhad
Open Journal of Psychiatry (OJPsych) , 2016, DOI: 10.4236/ojpsych.2016.61001
Abstract: Objective: The aim of this study was to determine Effectiveness Life Review on Life Satisfaction among Adolescents under the Supervision of Qazvin Well-being Center 2012-2013. Method: This study was a quasi-experimental research including experimental and control groups with a pretest-posttest design. The statistical population consisted of all 12 - 18 years old male students who were nurtured in Qazvin Well-being Center, among whom 16 individuals were selected through applying purposive sampling method and were randomly divided into experimental and control groups with equal number of subjects. The investigation was done using Diener’s (1985) Satisfaction with Life Scale (SWLS) Questionnaire. The experimental group received life review therapyin 6 sessions (90 minutes per session). Data were analyzed by using Analysis of Covariance(ANCOVA), using SPSS software. Results: Results indicated that life review therapywas effectivein increasing male adolescents’ life satisfaction living in the welfare center. Conclusion: Life review therapy improves quality of life and life satisfaction; therefore, this treatment can be used as an effective method to improve the living conditions of young people.
Excessive Weight Loss Following Laparoscopic Gastric Mini Bypass or Roux-En-Y Gastric Bypass Surgery  [PDF]
Abdolreza Pazouki, Sima Karbalaei Esmaeili
International Journal of Clinical Medicine (IJCM) , 2016, DOI: 10.4236/ijcm.2016.77047
Abstract: Background: More than 90 percent of obesity surgery is done using a laparoscope. This method is superior to open surgery and lead to fewer complications, shorter hospital stay and faster recovery. This study compared course of weight loss following laparoscopic Gastric Mini Bypass or Roux-En-Y Gastric Bypass surgery, after one year of follow up. Materials and Methods: This randomized clinical trial was conducted among obese patients admitted to Rasoul Akram Hospital Obesity Clinic, Half underwent laparoscopic Roux-En-Y Gastric Bypass and the rest were undergoing laparoscopic Mini Gastric Bypass. The amount of weight loss during the first year after surgery will be discussed. Results: In this study, 75 obese patients were studied. Most of the participants were female (82.7%). Participants aged between 18 and 59 years old (average = 36.8 ± 9.8 y/o). Before the surgery, there was no significant difference in weight between the two groups. Excessive weight loss after one month, six months nine months and one year between the two groups was significant and was more in Mini Gastric Bypass (p < 0.05). Conclusion: Respecting the benefits of Mini Gastric Bypass compared to the Roux-En-Y Gastric Bypass technique, it is suggested for patients with morbid obesity.
ELASTIC COMPOSITE REINFORCED LIGHTWEIGHT CONCRETE AS A TYPE OF RESILIENT COMPOSITE SYSTEMS
ESMAEILI KAMYAR
International Journal of Innovative Technology and Creative Engineering , 2012,
Abstract: A kind of Elastic Composite, Reinforced Lightweight Concrete (ECRLC) with the mentioned specifics is a type of "Resilient Composite Systems (RCS)" in which, contrary to the basic geometrical assumption of flexure theory in Solid Mechanics, "the strain changes in the beam height during bending" is typically "Non-linear". Through employing this integrated structure, with significant high strain capability and modulus of resilience in bending, we could constructively achieve high bearing capacities in beams with secure fracture pattern, in less weight. Due to the system's particulars and its behavior in bending, the usual calculation of the equilibrium steel amount to attain the low-steel bending sections with secure fracture pattern in the beams and its related limitations do not become propounded. Thereby, the strategic deadlock of high possibility of brittle fracture pattern in the bending elements made of the usual reinforced lightweight concretes, especially about the low-thickness bending elements as slabs, is being unlocked. This simple, applied technology and the related components and systems can have several applications in "the Road and Building Industries" too. Regarding the "strategic importance of the Lightweight & Integrated Construction in practical increase of the resistance and safety against earthquake" and considering the appropriate behavior of this resilient structure against the dynamic loads, shakes, impacts and shocks and capability of making some lightweight and insulating, non-brittle, reinforced sandwich panels and pieces, this system and its components could be also useful in "seismic areas". This system could be also employed in constructing the vibration and impact absorber bearing pieces and slabs, which can be used in "the Railroad & Subway Structures" too. Here, the "Resilient Composite Systems (RCS)" and particularly, ECRLC as a type of RCS have been concisely presented. [Meanwhile, in the related pictures & figures, an instance of the said new structure and its components and the results of some performed experiments (as the "in-bending" & in-compressive loadings of the slabs including this structure, similar to ASTM E 72 Standard) have been pointed.]
Brucellar Epididimo-Orchitis in Pediatric Ages Group
M Esmaeili
Iranian Journal of Pediatrics , 2004,
Abstract: Background: Brucellosis is an infection of domestic and wild animals (classical zoonosis) that is transmittable to human through abraded skin and mucosa by contact with infected animals or ingestion of infected dairy products. It is endemic in our country. It can involve various human organs including urogenital system. There is a few report of brucellar epididimo-orchitis in children. Methods: This case-series study has been conducted from between October 1993-2003 on pediatric age group (3-16 y) with epididimo-orchitis. Findings in Brucellar group were compared with those in nonspecific group. Findings: In 8 cases brucellosis was diagnosed and in others (13 cases) non specific bacterial epididimo-orchitis. There were fever, leukocytosis and increased RBC sedimentation rate only in a few cases. Conclusion: In endemic areas all cases of epididimo-orchitis must be worked up for brucellosis. The distinction between brucellar and nonspecific epididimo-orchitis is essential since the treatment is entirely different.
Antibiotics for Causative Microorganisms of Urinary Tract Infections
M Esmaeili
Iranian Journal of Pediatrics , 2005,
Abstract: Background: Urinary tract infection is a common bacterial disease in children which may cause chronic renal failure and hypertention. Many reports suggest that the rate of antibiotic resistance to infectious organisms is increasing. Therefore periodic surveillance of resistance rates is needed to ensure that appropriate recommendations can be made for better management & preventing of late sequelae. Methods In this cross sectional descriptive study we investigate the results of urinalysis, urine culture and antibiotic sensitivity of the isolated organisms in the urine of 1556 children aged under 10 years in Mashhad city between April 2001 and June 2002. Described parameters are age, sex, incidence of significant bacteriuria, leucocyturia, causative bacterial agents, and antibiotic sensitivity pattern. Findings: The most common age group in both sexes was infantile period. Median age was 20.3 months in boys and 47.5 months in girls. E.coli, klebsiella and proteus were the causative organisms in 87.3%. They were sensitive to cefotaxime, cefixime, cephalotin, amikacin, ciprofloxacin, nitrofurantoin and gentamicin in more than 96% while resistant to trimetoprim-sultamethoxazol in about 75%. Conclusion: We recommend, with regard to continuous changing in causative microorganisms isolated from patients with urinary tract infection and antibiotic sensitivity pattern, as a guideline for physicians, to determine bacterial sensitivity in populations yearly.
Decreased Incidence of Urinary Tract Infection in Circumcised Boys
M Esmaeili
Iranian Journal of Pediatrics , 2005,
Abstract: Background: Urinary tract infection (UTI) is common in childhood with serious sequelae. Among infants, boys are more likely to develop UTI. The aim of this study was to determine circumcision effects in decreasing UTI incidence and appropriate age of circumcision. Methods: During a prospective study lasting 7 years, 166 boys with UTI, aged less than 6 years, were allocated into 2 groups. They had no urinary tract abnormalities. In the first group 79 boys ranging in age from 2 months to 5.5 years (mean 11.3 ± 3.1 mo) were circumcised after UTI treatment and then observed for 6 months with taking urinalysis (U/A) and urine culture (U/C) 1-2 times monthly. The second group consisted of 87 boys aged 40 days to 5.5 years (mean 12.1 ± 3.4 mo). After treatment of UTI, the boys were observed 6 months with taking U/A and U/C, then circumcised and served for another 6 months. The incidence of UTI in the two groups was compared using Chi-square test. For comparing the incidence of UTI in 6 months before and 6 months after circumcision in the second group we used Mcnemar method. Findings: There was significant difference (P=0.009) in occurrence of UTI in first and second group. There was also significant difference (P<0.0001) in incidence of UTI in 6-month periods before and after the circumcision in second group patients. Conclusions: The present study indicated that circumcision decreases the risk of UTI in boys, independent of age. Therefore circumcision should be considered in newborn period and any patient with UTI or urinary tract abnormalities. Routinely performing cystourethrography in boys with first attack of UTI without urinary tract abnormalities (proven by history, physical examination and sonography) is questionable and needs further studies.
GABAA Receptor Subunits in Rat Testis and Sperm
Abolghasem Esmaeili
International Journal of Fertility & Sterility , 2009,
Abstract: Background: γ-Aminobutyric acid (GABA) is considered to be the predominant inhibitoryneurotransmitter in mammalian central nervous systems (CNS). There are two major classes of GABAreceptors: GABAARs and GABABRs. The GABAA receptor is derived from various subunits such asalpha 1-alpha 6, beta1-beta 3, gamma1-gamma 4, delta, epsilon, pi, and rho1-3. Intensive research hasbeen performed to understand and establish the distribution and functions of these receptors in theCNS and peripheral tissues. The presence of some GABAA receptors in sperm prompted us to explorethe existence of GABAA receptors in rat testis and sperm.Materials and Methods: Total cellular RNA was isolated from Wistar rat sperm and testis andreverse transcriptased to cDNA. PCR reactions were performed in a 20μl (microliter) volumecontaining specific GABAAR subunits (forward and reverse primers) with other required materials.Reactions were carried out using a PCR machine to investigate the existence of GABAA receptorsubunits in rat testis and sperm. The amplification products were analyzed on 2% agarose gelsstained with ethidium bromide.Results: Our results showed that GABAARs composed of α5, β1, β3, and γ1 subunits wereexpressed in both testis and sperm. These results indicate that, in sperm, GABAA receptors mighthave important functions.Conclusion:Sperm could be a novel site of GABAA expression. Further studies should be taken to explore therole of these receptors on sperm acrosome reaction.
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