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Search Results: 1 - 10 of 247 matches for " Masoomeh Mahmoodi "
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Treatment efficiency in children with severe to profound hearing impairment: A comparative study of general language stimulation and developmental-descriptive approach based on morphological changes
Masoomeh Salmani,Ali Agha Sadollahi,Raheb Ghorbani,Behrooz Mahmoodi Bakhtiari
Koomesh , 2012,
Abstract: Introduction: In speech therapy, treatment efficacy includes 3 specific fields as treatment effectiveness,efficiency and effects. Treatment efficiency compares two approaches or more with each other. The aim ofthis study was to compare of two approaches: general language stimulation and developmental-descriptiveapproach.Materials and Methods: It has been done as an interventional-longitudinal study with14 participants(primary school students with hearing loss) for two educational years. All changes in different parts oflanguage were assessed by decontextualized language test, storytelling, action verb and sentence writing inthe end of each year.Results: Total number of affixes in storytelling, derivational suffix in action verb test, expression ofprepositions and adverb (location) as well as perception superlative adjective in decontextualized languagetest had statistically significant changes (P<0.05).Conclusion: Findings show developmental-descriptive approach has more positive effectsbecause of specificity of language treatment goals
Choice of Delivery in Tehran and Some Related Factors
Masoomeh Alimohammadian,Mamak Shariat,Mahmood Mahmoodi,Fatemeh Ramezanzadeh
Journal of Family and Reproductive Health , 2007,
Abstract: Objective: This study assessed the influence of maternal request on elective cesarean rate and related factors in maternity hospitals in Tehran.Materials and Method: This cross sectional descriptive analytic study was performed via a two-step random sampling technique, using data from 824 pregnant women who attended the maternity hospitals in Tehran in 2001. A questionnaire covering past and present obstetrical history and demographic characteristics was completed for each mother. SPSS software was used for data analysis. Descriptive analysis and inference tests, including chi-square and t-tests were used. Logistic regression test was also used to find the correlation between variables. P value less than 0.05 was considered for statistical significance.Results: Totally 66.5% of mothers underwent cesarean and 33.5% had normal vaginal delivery. From cesarean cases 72% were elective and of these 22% were done upon maternal request. It was shown that 71% of mothers who selected cesarean had no scientific reason. Also, 65% of doctors suggested cesarean for their patients without any true medical indication. The majority of elective cesareans performed on maternal request were done in private hospitals (86% in private vs. 14% in public hospitals) (P<0.0001). High educational , employment status and first pregnancy significantly increase the demand for cesarean section.Conclusion: Increasing the level of awareness and attitude of mothers and providing painless normal vaginal delivery as well as vaginal delivery after previous cesarean, the frequency of unnecessary cesareans and related complications can be decreased.
Distribution and Sources of Polycyclic Aromatic Hydrocarbons in the Sediment of Bushehr Coastal Zone-Iran
Masoomeh Mahmoodi,Alireza Safahieh,Yadollah Nikpour,Kmal Ghanemi
Iranica Journal of Energy and Environment (IJEE) , 2012,
Abstract: Polycyclic aromatic hydrocarbons (PAHs) concentrations in sediments measured from five stations in coastal area of Bushehr-Iran. Total PAHs concentration ranged from 844.9 to 4790.3 ng g-1 in summer and 935.0 to 4972.0 ng g-1 in winter. Significant difference was observed between total PAHs concentration in studied stations (P<0.05). Among the studied stations tPAHs concentration was higher in Rafael and followed by Sheghab station. The lowest level of tPAHs observed in Abshirinkon station. There was no significant difference between tPAHs concentration in August and February (P>0.05). Based on the number of aromatic rings in the molecular structure, the composition pattern of PAHs was different within studied stations. The studied stations receives their PAHs from both petrogenic and pyrolitic sources. The level of PAHs contamination in the Bushehr coastline founded to be moderate to high compared with other studied locations. Regular monitoring of PAHs contaminant in the region is recommended.
Effect of vanillin and its acid and alcohol derivatives on the diphenolase activity of mushroom tyrosinase
Masoomeh Bagheri-Kalmarzi,Reza H.Sajedi,Elham Asadollahi,Nosrat O. Mahmoodi
Molecular Biology Research Communications , 2012,
Abstract: For the first time in the present study the effects of vanillin, vanillyl alcohol, vanillic acid, as well as the newly synthesized vanillin derivative, bis-vanillin, were investigated on the oxidation of dopamine hydrochloride by mushroom tyrosinase. Among them, vanillin and bis-vanillin act as activators, while vanillyl alcohol and vanillic acid exhibited inhibitory effects, the IC50 values being estimated 1.5 and 1.0 mM, respectively. These compounds were mixed inhibitors. The presence of aldehyde and metoxy groups at the meta position of aromatic compounds seems to cause them to react as tyrosinase activators, as observed in the case of vanillin and bis-vanillin. The presence of both groups in bis-vanillin results in a stronger activation effect compared to vanillin. The results indicate that the electron-withdrawing capacity of the functional group at the C-1 position is essential for the inhibitory potency of vanillin derivatives. In comparison with other benzoic acid derivatives, the results obtained in this study suggest that the relative positioning of hydroxy and methoxy groups at meta and para positions plays an important role in the inhibition effects of benzoic acids and their inhibition potency.
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.
Ethics and Validity Stance in Educational Assessment
Masoomeh Estaji
English Language and Literature Studies , 2011, DOI: 10.5539/ells.v1n2p89
Abstract: Assessment is a powerful tool which can shape curriculum, teaching and learning. One of the major topics which has been the focus of so much debate among the scholars is the concept of ethics in educational assessment systems. The purpose of this paper is to touch upon the issue of ethics in language assessment from validity perspectives. To ensure effective planning, implementation, and evaluation of learning, certain principles and guidelines for beliefs and behaviors are adopted. These principles and guidelines are identified as ethical standards. The central question to be addressed here is whether any test can be defended as ethical, or moral. This study also examines professional ethics, specifically ethical principles as they relate to educational assessment. And finally, some suggestions and guidelines will be offered for applying ethics in educational assessment to maximize validity and fair application of language test scores.
LDPC-Coded OFDM Transmission Based on Adaptive Power Weights in Cognitive Radio Systems  [PDF]
Seyed Eman Mahmoodi, Bahman Abolhassani
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2011, DOI: 10.4236/ijcns.2011.432094
Abstract: In this paper, we propose a new scheme to improve the performance of an LDPC-coded OFDM based cognitive radio (CR) link by applying adaptive power weights. To minimize estimation errors of detected signals in all the CR subcarriers, power weights are allocated to the CR subcarriers at the secondary transmitter. Some constraints for the power weights are considered, such as keeping the interference power introduced by the CR to primary users below a given interference threshold and also keeping sum of transmission powers in all CR subcarriers within a total transmission power. The LDPC decoder applies these power weights in the Log Likelihood Ratios (LLRs) used in message passing scheme at the secondary receiver to achieve more reliable communications. So, the received signal in each CR subcarrier will be decoded with the knowledge of transmission power weights, which come from the cognitive feedback channel without additional cost. Simulation results demonstrate that our proposed scheme achieves a lower bit error rate and a higher transmission rate compared with those of the same scheme without applying power weights.
Fabrication, Visualization and Analysis of Fluorescein Sodium Encapsulated PLGA@CS Nanoparticles as Model for Photothermomechanical Drug Delivery Using Pulsed 532 nm Laser  [PDF]
Mohammad E. Khosroshahi, Mahboobeh Mahmoodi
Advances in Nanoparticles (ANP) , 2018, DOI: 10.4236/anp.2018.73005
Abstract: PLGA/CS nanoparticles containing fluorescein sodium as drug model were synthesized and characterized to investigate the feasibility of laser-induced drug delivery using pulse 532 nm. The main objective was to investigate the photothermally-induced mechanical force for transporting the nanoparticles. An argon laser was used to excite the fluorescence of the samples after irradiation. The preliminary results indicated that the drug nanoparticles encapsulated trapped by the cavitation bubbles can be transported by photothermomechanical effect. Different regions of interactions are defined and while in our case, the thermoelastic does not apply due to higher fluences, vaporization and laser-induced thermal breakdown (LITB) including the plasma formation and shock waves played an important and major role. Threshold fluences of 2.8, 18 and 102 Jcm-2 corresponding to 0.28, 1.8 and 10 GWcm-2 and 3.8, 30, and 171 MPa are determined for ablation, vaporization and LITB mechanisms respectively. The secondary microbubbles due to explosion of the primary transient cavitation bubbles played a key role in delivery process. Despite the dominant argon laser brightness, the laser-induced fluorescence spectroscopy (LIFS) demonstrated the fluorescence emission of the cavitation bubbles carrying due to the drug nanoparticles entrapped within the biogelatin after exposure to laser radiation, the irradiation, which confirms the possibility of transport of drug nanoparticles by laser cavitation. Finally, it is suggested that the nature of such photothermal and photo non-thermal mechanical effects is governed and influenced by determining and criticizing in terms of the type of nanomaterial as well as their synthesis process engineering and fabrication as they can be made case sensitive by selecting different types of materials for a specific application.
Mixed convection inside nanofluid filled rectangular enclosures with moving bottom wall
Mahmoodi Mostafa
Thermal Science , 2011, DOI: 10.2298/tsci101129030m
Abstract: The mixed convection fluid flow and heat transfer in lid-driven rectangular enclosures filled with the Al2O3-water nanofluid is investigated numerically. The left and the right vertical walls as well as the top horizontal wall of the enclosure are maintained at a constant cold temperature Tc. The bottom horizontal wall of the enclosure, which moves from left to right, is kept at a constant hot temperature Th, with Th>Tc. The governing equations written in terms of the primitive variables are solved using the finite volume method and the SIMPLER algorithm. Using the developed code, a parametric study is performed and the effects of the Richardson number, the aspect ratio of the enclosure and the volume fraction of the nanoparticles on the fluid flow and heat transfer inside the enclosure are investigated. The results show that at low Richardson numbers, a primary counterclockwise vortex is formed inside the enclosure. More over it is found that for the range of the Richardson number considered, 10-1-101, the average Nusselt number of the hot wall, increases with increasing the volume fraction of the nanoparticles. Also it is observed that the average Nusselt number of the hot wall of tall enclosures is more that to that of the shallow enclosures.
Weighted Fourier and Fourier-Stieltjes Algebras
Amin Mahmoodi
Mathematical Sciences Quarterly Journal , 2010,
Abstract: Let $G$ be a locally compact group and $omega$ be a symmetric weight function on $G$. We define a co-product $Gamma_omega$ on the weighted algebra $L^infty(G, omega^{-1})$ of essentially $omega$-bounded Borel measurable functions on $G$ and show that $L^infty(G, omega^{-1})$ becomes a Kac algebra with natural co-inverse $kappa_omega$ and Haar weight $phi_omega$. We use the machinery of Kac algebras to introduce the weighted Fourier and Fourier-Stieltjes algebra $ A(G,omega^{-1})$ and $ B(G,omega^{-1})$ of $G$.
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