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Prevalence of flat foot and hallux valgus deformity among primary school female students in Kiar city of Chaharmahal and Bakhtiari
Sedighe Sadat Mirbagheri,Reza Vahab Kashani,Fateme Mehraban
Pajouhan Scientific Journal , 2013,
Abstract: Introduction: Foot deformities are common among complaints of patients referred to the orthopedic centers. Most of naturally occurring lower limb deformities in children, which are rather common, would be corrected with further normal growth. However, a small percentage of these problems remain unresolved and may cause complications in the future. The main aim of this study is determination of prevalence of flat foot and hallux valgus deformity among primary school female students in Kiar city of Chaharmahal and BakhtiariMaterial and Methods: This is a cross sectional study. Foot posture index (FPI 6) test evaluate for 345 students in age range 7- 11 years and two groups of 7 to 9 years and 11 to 10 years. Also prevalence of hallux valgus among 345 students evaluated.Results: 7.8 % of studied subjects had flat foot deformity. Among 345 students, 12 (6.6%) students in range of age 7 -9 years and 15 (9.3 %) students in range of 10-11 had flat foot deformity. Also prevalence of hallux valgus was 16.5%.Conclusion: These findings point to the importance of proper physical examination, early diagnosis and on-time treatment of foot deformities such as flat foot and hallux valgus deformity in children.
Comparison of Creativity and Self-Confidence of Gifted and Normal High School Students of District Two in Zahedan  [PDF]
Sedighe Salari, Hossein Jenaabadi
Psychology (PSYCH) , 2015, DOI: 10.4236/psych.2015.613171
Abstract: The present study aimed to compare creativity and self-confidence of gifted and normal high school students studying in district two in Zahedan. The casual-comparative method was adapted. The statistical population of the study included all male and female high school students studying in public schools, schools for exceptional talents, martyrs’, non-profit and private schools in Zahedan, district two. According to the statistics, the number of male and female students studying in these schools was 8530 students, among which 368 students were selected. To collect data, Abedi Creativity Test and Moradi’s Inventory of the Level of Self-Confidence (2011) were used. The obtained data were analyzed using independent t-test and MANOVA. The results of multivariate covariance analysis indicated the difference between gifted and normal students considering their creativity. Moreover, there was a significant difference between the level of self-confidence of gifted and normal high school students in Zahedan. Additionally, no significant difference was found between male and female students with regard to their creativity and self-confidence.
Radiographic Evaluation of the Ankle Mortise
Hamid Mirbagheri
Iranian Journal of Radiology , 2010,
Abstract: The ankle joint is the most frequently injured joint in adults. Decisions on management are usually based on clinical examination and interpretation of the x-rays. Stability of the ankle mortise relies on the configuration of the osseous structures and the ligaments. A basic radiographic examination consists of a mortise-view and a lateral view. Some add the AP-view. The Mortise view is an AP-view with 15-25 degrees endorotation of the foot. "nThe view clearly demonstrates both lateral and medial joint spaces. On a true AP-view the talus overlaps a portion of the lateral malleolus obscuring the lateral aspect of the ankle joint. However, the AP-view will give you an extra view on both malleoli from a different angle. The lateral radiograph of the ankle should include the base of the fifth metatarsal because of the frequency of fractures at this side that clinically mimic a fracture of the ankle.
The Study of Antioxidant and Anticarcinogenic Green Tea and Black Tea
Sedighe Mehrabian
Pakistan Journal of Biological Sciences , 2007,
Abstract: Tea is one of the most popular beverages consumed worldwide. The relationship between tea consumption and human cancer incidence is an important concern. The effect of tea extract and ingredients, polyphenol and caffeine on the mutagenicity of Sodium Azide was examined in vitro by using Salmonella typhimurium TA100, TA98 and TA1535 in the presence of induced rat liver S9 fractions. Experimental studies have demonstrated the significant antimutagenic and anticarcinogenic effects of both Green and Black tea and its polyphenol and caffeine multiple mutational assay. Caffeine was the less active. Tea comes in many variants. Common tea such as Black tea contains little antioxidant and the amount of caffeine. Green tea has about the caffeine, but contains a good amount of antioxidant.
Orbital motion effects in astrometric microlensing
Sedighe Sajadian
Physics , 2014, DOI: 10.1093/mnras/stu158
Abstract: We investigate lens orbital motion in astrometric microlensing and its detectability. In microlensing events, the light centroid shift in the source trajectory (the astrometric trajectory) falls off much more slowly than the light amplification as the source distance from the lens position increases. As a result, perturbations developed with time such as lens orbital motion can make considerable deviations in astrometric trajectories. The rotation of the source trajectory due to lens orbital motion produces a more detectable astrometric deviation because the astrometric cross-section is much larger than the photometric one. Among binary microlensing events with detectable astrometric trajectories, those with stellar-mass black holes have most likely detectable astrometric signatures of orbital motion. Detecting lens orbital motion in their astrometric trajectories helps to discover further secondary components around the primary even without any photometric binarity signature as well as resolve close/wide degeneracy. For these binary microlensing events, we evaluate the efficiency of detecting orbital motion in astrometric trajectories and photometric light curves by performing Monte Carlo simulation. We conclude that astrometric efficiency is 87.3 per cent whereas the photometric efficiency is 48.2 per cent.
Binary astrometric microlensing with Gaia
Sedighe Sajadian
Physics , 2015, DOI: 10.1088/0004-6256/149/4/147
Abstract: We investigate whether Gaia can specify the binary fractions of massive stellar populations in the Galactic disk through astrometric microlensing. Furthermore, we study if some information about their mass distributions can be inferred via this method. In this regard, we simulate the binary astrometric microlensing events due to massive stellar populations according to the Gaia observing strategy by considering (a) stellar-mass black holes, (b) neutron stars, (c) white dwarfs and (d) main-sequence stars as microlenses. The Gaia efficiency for detecting the binary signatures in binary astrometric microlensing events is $\sim 10-20$ per cent. By calculating the optical depth due to the mentioned stellar populations, the number of the binary astrometric microlensing events being observed with Gaia with detectable binary signatures, for the binary fraction about 0.1, is estimated as 6, 11, 77 and 1316 respectively. Consequently, Gaia can potentially specify the binary fractions of these massive stellar populations. However, the binary fraction of black holes measured with this method has the large uncertainty owing to a low number of the estimated events. Knowing the binary fractions in massive stellar populations helps for studying the gravitational waves. Moreover, we investigate the number of massive microlenses which Gaia specifies their masses through astrometric microlensing of single lenses toward the Galactic bulge. The resulted efficiencies of measuring the mass of mentioned populations are 9.8, 2.9, 1.2 and 0.8 per cent respectively. The number of their astrometric microlensing events being observed in the Gaia era in which the lens mass can be inferred with the relative error less than 0.5 toward the Galactic bulge is estimated as 45, 34, 76 and 786 respectively.
Detecting stellar spots through polarimetry observations of microlensing events in caustic-crossing
Sedighe Sajadian
Physics , 2015, DOI: 10.1093/mnras/stv1349
Abstract: In this work, we investigate if gravitational microlensing can magnify the polarization signal of a stellar spot and make it be observable. A stellar spot on a source star of microlensing makes polarization signal through two channels of Zeeman effect and breaking circular symmetry of the source surface brightness due to its temperature contrast. We first explore the characteristics of perturbations in polarimetric microlensing during caustic-crossing of a binary lensing as follows: (a) The cooler spots over the Galactic bulge sources have the smaller contributions in the total flux, although they have stronger magnetic fields. (b) The maximum deviation in the polarimetry curve due to the spot happens when the spot is located near the source edge and the source spot is first entering the caustic whereas the maximum photometric deviation occurs for the spots located at the source center. (c) There is a (partial) degeneracy for indicating spot's size, its temperature contrast and its magnetic induction from the deviations in light or polarimetric curves. (d) If the time when the photometric deviation due to spot becomes zero (between positive and negative deviations) is inferred from microlensing light curves, we can indicate the magnification factor of the spot, characterizing the spot properties except its temperature contrast. The stellar spots alter the polarization degree as well as strongly change its orientation which gives some information about the spot position. Although, the photometry observations are more efficient in detecting stellar spots than the polarimetry ones, but polarimetry observations can specify the magnetic field of the source spots.
Thyroid dysfunction and thyroid antibodies in Iranian patients with vitiligo
Moradi Sedighe,Ghafarpoor Gholamhossein
Indian Journal of Dermatology , 2008,
Abstract: Vitiligo is a common skin disorder, and the pathogenesis is unknown. An increased prevalence of autoimmune thyroid diseases has been described in these patients. The aim of this study is to assess the prevalence of thyroid dysfunction and hypoparathyroidism in patients with vitiligo. Materials and Methods: One hundred and nine patients (38 males and 71 females with vitiligo were enrolled. Thyroid physical examination was carried out. Thyroid function tests, thyroid antibodies, calcium and phosphorus were assessed. The collected data were analysed by SPSS version 11. Results: Thyromegaly was found in 30.1% of patients. Hypothyroidism was found in 16 (15.7%) out of 109 cases. Two of them had clinical and 14 had subclinical hypothyroidism. One patient had Grave′s disease. Antibody positivity was the most common disorder (anti-TPO and anti-tg were positive in 36.7 and 32.1%, respectively). No patient had hypoparathyroidism. Conclusion: According to our study, thyroid dysfunction, particulary hypothyroidism and thyroid antibodies increase in patients with vitiligo. We recommend thyroid antibodies assessment and thyroid function evaluation in these patients.
Illuminating Hot Jupiters in caustic crossing
Sedighe Sajadian,Sohrab Rahvar
Physics , 2010, DOI: 10.1111/j.1365-2966.2010.16901.x
Abstract: In recent years a large number of Hot Jupiters orbiting in a very close orbit around the parent stars have been explored with the transit and doppler effect methods. Here in this work we study the gravitational microlensing effect of a binary lens on a parent star with a Hot Jupiter revolving around it. Caustic crossing of the planet makes enhancements on the light curve of the parent star in which the signature of the planet can be detected by high precision photometric observations. We use the inverse ray shooting method with tree code algorithm to generate the combined light curve of the parent star and the planet. In order to investigate the probability of observing the planet signal, we do a Monte-Carlo simulation and obtain the observational optical depth of $\tau \sim 10^{-8}$. We show that about ten years observations of Galactic Bulge with a network of telescopes will enable us detecting about ten Hot Jupiter with this method. Finally we show that the observation of the microlensing event in infra-red band will increase the probability for detection of the exo-planets.
Simulation of a strategy for the pixel lensing of M87 using the Hubble Space Telescope
Sedighe Sajadian,Sohrab Rahvar
Physics , 2011, DOI: 10.1111/j.1365-2966.2011.19671.x
Abstract: In this work, we propose a new strategy for the pixel-lensing observation of M87 in the Virgo cluster using the {\it Hubble Space Telescope} (HST). In contrast to the previous observational strategy by Baltz et al., we show that a few days intensive observation with the duration of $\sim 90 $min in each HST orbit will increase the observational efficiency of the high-magnification events by more than one order of magnitude. We perform a Monte-Carlo simulation for this strategy and we show that the number of high magnification microlensing events will increase at the rate of 4.2 event per day with a typical transit time scale of 16 h. We also examine the possibility of observing mini-halo dark matter structures using pixel lensing.
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