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Search Results: 1 - 10 of 1071 matches for " Danesh Pajoh AH "
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A case report of left ventricular wall rupture
Kordovani H,Danesh Pajoh AH
Tehran University Medical Journal , 1994,
Abstract: Cardiac rupture, particularly rupture of the left ventricular wall, has a very high mortality rate. In this occasion, even if injured patients being alive when carried to the hospital, many of them will die due to following possible reasons: severe bleeding, cardiac tamponade, wasting time for routine and usual diagnostic procedures or transferring the injured to other hospital equipped for cardiac surgery. The only way to avoid these dangerous hazards is prompt thoracotomy and repair of the wound, which must be done in any surgical ward available. We report a case of cardiact rupture due to penetrating injury caused by a slender sharp object, passing through the heart anteroposteriorly. The patient was successfully rescued. This report indicates that in hospital, where no facility for cardiac surgery is available, this kind of emergency surgery for cardiac rupture is very indicative and may save the life of injured patient.
Application of Adomian’s Decomposition Method for the Analytical Solution of Space Fractional Diffusion Equation  [PDF]
Mehdi Safari, Mohammad Danesh
Advances in Pure Mathematics (APM) , 2011, DOI: 10.4236/apm.2011.16062
Abstract: Spatially fractional order diffusion equations are generalizations of classical diffusion equations which are increasingly used in modeling practical super diffusive problems in fluid flow, finance and others areas of application. This paper presents the analytical solutions of the space fractional diffusion equations by Adomian’s decomposition method (ADM). By using initial conditions, the explicit solutions of the equations have been presented in the closed form. Two examples, the first one is one-dimensional and the second one is two-dimensional fractional diffusion equation, are presented to show the application of the present techniques. The present method performs extremely well in terms of efficiency and simplicity.
A Comparison between Major Factor Extraction and Factor Rotation Techniques in Q-Methodology  [PDF]
Noori Akhtar-Danesh
Open Journal of Applied Sciences (OJAppS) , 2017, DOI: 10.4236/ojapps.2017.74013
Abstract: The statistical analysis in Q-methodology is based on factor analysis followed by a factor rotation. Currently, the most common factor extraction methods are centroid and principal component extractions and the common techniques for factor rotation are manual rotation and varimax rotation. However, there are some other factor extraction methods such as principal axis factoring and factor rotation methods such as quartimax and equamax which are not used by Q-users because they have not been implemented in any major Q-program. In this article we briefly explain some major factor extraction and factor rotation techniques and compare these techniques using three datasets. We applied principal component and principal axis factoring methods for factor extraction and varimax, equamax, and quartimax factor rotation techniques to three actual datasets. We compared these techniques based on the number of Q-sorts loaded on each factor, number of distinguishing statements on each factor, and excluded Q-sorts. There was not much difference between principal component and principal axis factoring factor extractions. The main findings of this article include emergence of a general factor and a smaller number of excluded Q-sorts based on quartimax rotation. Another interesting finding was that a smaller number of distinguishing statements for factors based on quartimax rotation compared to varimax and equamax rotations. These findings are not conclusive and further analysis on more datasets is needed.
Using Cohen’s Effect Size to Identify Distinguishing Statements in Q-Methodology  [PDF]
Noori Akhtar-Danesh
Open Journal of Applied Sciences (OJAppS) , 2018, DOI: 10.4236/ojapps.2018.82006
Abstract: Q-methodology was introduced more than 80 years ago to study subjective topics such as attitudes, perceptions, preferences, and feelings and there has not been much change in its statistical components since then. In Q-methodology, subjective topics are studied using a combination of qualitative and quantitative techniques. It involves development of a sample of statements and rank-ordering these statements by study participants using a grid known as Q-sort table. After completion of Q-sort tables by the participants, a by-person factor analysis (i.e., the factor analysis is performed on persons, not variables or traits) is used to analyze the data. Therefore, each factor represents a group of individuals with similar views, feelings, or preferences about the topic of the study. Then, each group (factor) is usually described by a set of statements, called distinguishing statements, or statements with high or low factor scores. In this article, we review one important statistical issue, i.e. the criteria for identifying distinguishing statements and provide a review of its mathematical calculation and statistical background. We show that the current approach for identifying distinguishing statements has no sound basis, which may result in erroneous findings and seems to be appropriate only when there are repeated evaluations of Q-sample from the same subjects. However, most Q-studies include independent subjects with no repeated evaluation. Finally, a new approach is suggested for identifying distinguishing statements based on Cohen’s effect size. We demonstrate the application of this new formula by applying the current and the suggested methods on a Q-dataset and explain the differences.
Unoccluded Earmold
Aliasghar Danesh
Audiology , 1992,
Abstract: It has always been attempted that systems connected to the ear through hearing aids efficiently meet the patient expectations. It is recommended to avoid using occluded earmolds when the hearing is normal or there is mild hearing loss. In order that natural sound reaches to the ear, the ear canal should stay open as much as possible.To achieve the above goal and the suitable acoustic modifications, non-occluding ear molds are beneficial.
Grid Resource Selection Optimization with Guarantee Quality of Service by Hybrid of Genetic and Simulated Annealing Algorithms
Hossein Shirgahi,Malihe Danesh,Najmeh Danesh
Lecture Notes in Engineering and Computer Science , 2010,
Abstract:
Fractional Euler Lagrange Equations for Irregular Lagrangian with Holonomic Constraints  [PDF]
Ola A. Jarab’ah
Journal of Modern Physics (JMP) , 2018, DOI: 10.4236/jmp.2018.98105
Abstract: In this paper the fractional Euler Lagrange equations for irregular Lagrangian with holonomic constraints have been presented. The equations of motion are obtained using fractional Euler Lagrange equations in a similar manner to the usual mechanics. The results of fractional calculus reduce to those obtained from classical calculus (the standard Euler Lagrange equations) when γ0 and α, β are equal unity only. Two problems are considered to demonstrate the application of the formalism.
Performance Analysis of Parallel Non-Orthogonal Peec-Based Solver for Emc Applications
Danesh Daroui;Jonas Ekman
PIER B , 2012, DOI: 10.2528/PIERB12041008
Abstract: A parallel implementation of a quasi-static Partial Element Equivalent Circuit (PEEC)-based solver that can handle electromagnetic problems with non-orthogonal structures is presented in this paper. The solver has been written in C++ and employs GMM++ and ScaLAPACK computational libraries to make the solver fast, efficient, and adaptable to current parallel computer systems. The parallel PEEC-based solver has been tested and studied on high performance computing clusters and the correctness of the solver has been verified by doing comparisons between results from orthogonal routines and also another type of electromagnetic solver, namely FEKO. Two non-orthogonal numerical test cases have been analysed in the time and frequency domain. The results are given for solution time and memory consumption while bottlenecks are pointed out and discussed. The benchmarks show a good speedup which gets improved as the problem size is increased. With the capability of the presented solver, the non-orthogonal PEEC formulation is a viable tool for modelling geometrically complex problems.
The Society and the Hearing Aid
Ali Asghar Danesh
Audiology , 1996,
Abstract: Many people around the world are in need for using hearing aid, a prothesis which is prescribed for compensating the hearing loss in hard of hearing patients.Although Hearing aid has crucial role in improving hearing skills in such patients, it has many psychological effects and Social premonitions for the users.we will discuss some of these distresses and the common approaches for resolving economical, cosmetic and the emotional and social problems relted to hearing aid will be discussed.
Effects of Vitamin E, Calcium Carbonate and Milk of Magnesium on Muscular Cramps in Pregnant Women
Azar Danesh Shahraki
Journal of Medical Sciences , 2006,
Abstract: Muscular cramp is a painful, local and unusual contraction of one or a group of muscles; more than half of pregnant women suffer from leg muscular cramps. The present study investigates the effect of vitamin E treatment, milk of magnesium suspension and calcium carbonate treatment on pregnant women with leg cramps. This is a descriptive cross-sectional interventional study on 120 pregnant multiparous women aged between 25 to 35 years which suffered from muscular cramps and were in 25-28th week of gestational age provisionally referred to shahrekord gynecology clinic between September 2004 and July 2005. They were randomizely divided to three groups. The number, tensity and duration of cramps were registered for a term of 45 days the first group was given vitamin E, second group was given milk of magnesium suspension (oral) and third group was given calcium carbonate tablet. On 45th and 90th days of treatment, the number, tensity and duration of muscular cramps was repeatedly examined. Mean of cramp duration in each three groups was reduced in second visit but in third visit only that group which took vitamin E showed reduction in mean cramp duration. During the second visit of all three groups had reduction in the number of leg cramps in comparison with the first visit and means the tensity of cramp pains was reduced but in third visit (after 90 days of treatment) the severity and number of pains in first group remarkably was reduced in comparison with two other groups. It seems that vitamin E is more effective in reduction of number, severity and duration of leg cramps during the pregnancy in comparison with milk of magnesium suspension and calcium carbonate.
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