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Search Results: 1 - 10 of 104 matches for " Fateme Ghomanjani "
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Bezier Control Points Method to Solve Scheduling of Injections of Immunotherapeutic Agents  [PDF]
Fateme Ghomanjani
Intelligent Control and Automation (ICA) , 2012, DOI: 10.4236/ica.2012.31003
Abstract: Cancer immunotherapy aims at enhancing immune system to defend against the tumor. However, it is associated with injecting small doses of tumor-bearing molecules or even using drugs. The problem is that how to schedule these injections effectively and/or how to apply drugs in a way to decrease toxic side effects of drugs such that the tumor growth to be stopped or at least to be limited. Here, the theory of optimal control has been applied to find the optimal schedule of injections of an immunotherapeutic agent against cancer. The numerical method employed works for any dynamic linear system and has almost precise solution. In this work, it was tested for a well known model of the tumor immune system interaction.
Variational Iterative Method Applied to Variational Problems with Moving Boundaries  [PDF]
Fateme Ghomanjani, Sara Ghaderi
Applied Mathematics (AM) , 2012, DOI: 10.4236/am.2012.35061
Abstract: In this paper, He’s variational iterative method has been applied to give exact solution of the Euler Lagrange equation which arises from the variational problems with moving boundaries and isoperimetric problems. In this method, general Lagrange multipliers are introduced to construct correction functional for the variational problems. The initial approximations can be freely chosen with possible unknown constant, which can be determined by imposing the boundary conditions. Illustrative examples have been presented to demonstrate the efficiency and applicability of the variational iterative method.
The Bezier Control Points Method for Solving Delay Differential Equation  [PDF]
Fateme Ghomanjani, Mohammad Hadi Farahi
Intelligent Control and Automation (ICA) , 2012, DOI: 10.4236/ica.2012.32021
Abstract: In this paper, Bezier surface form is used to find the approximate solution of delay differential equations (DDE’s). By using a recurrence relation and the traditional least square minimization method, the best control points of residual function can be found where those control points determine the approximate solution of DDE. Some examples are given to show efficiency of the proposed method.
Solving the Optimal Control of Linear Systems via Homotopy Perturbation Method  [PDF]
Fateme Ghomanjani, Sara Ghaderi, Mohammad Hadi Farahi
Intelligent Control and Automation (ICA) , 2012, DOI: 10.4236/ica.2012.31004
Abstract: In this paper, Homotopy perturbation method is used to find the approximate solution of the optimal control of linear systems. In this method the initial approximations are freely chosen, and a Homotopy is constructed with an embedding parameter , which is considered as a “small parameter”. Some examples are given in order to find the approximate solution and verify the efficiency of the proposed method.
The Impact of Financial Crisis on B2C e-Commerce  [PDF]
Fateme Ghadami, Abdollah Aghaie, Morteza Mohammadkhan
iBusiness (IB) , 2010, DOI: 10.4236/ib.2010.22024
Abstract: Many experts believe that the global financial crisis in 2008 is the worst of its kind since the Great Depression in 1929. The crisis was started from housing market in the US and spread quickly into financial markets. It has had a ripple effect around the world and many other industrialized economies were troubled by its consequences and almost every industry has been influenced by its outcomes. Online retail (or B2C e-Commerce) as a part of retail industry was not immune from the financial crisis and its sales has a dramatic decline. In this paper it is found that 3 factors are main players which have impacted on online retail sales including: less credit available; increasing saving rate and decreasing consumption expenditures and falling consumer confidence and sentiment. Also by representing several figures and tables, factors affecting this trend such as age class, income and gender are discussed.
Comparison of rebonding effect on microleakage of class V composite restorations using two low viscosity resins: an in vitro study
Azita Kaviani,Fateme Asareh
Journal of Dental Medicine , 2012,
Abstract: Background and Aims: Although composite resin restorations have many advantages, they can lead to several clinical problems. The primary reason for these problems is microleakage. The aim of this study was to compare the rebonding effect on microleakage of class V composite restorations using two low viscosity resins.Materials and Methods: In this in vitro study, 60 class V composite restorations were performed in buccal and lingual surfaces of human extracted premolars with the occlusal margin in enamel and the gingival margin in dentin/cementum. The teeth were randomly divided into 3 groups: (I) restorations with no rebonding, (II) restoration margins rebonded with an enamel adhesive (Margin Bond), (III) restoration margins rebonded with a specific unfilled resin. The specimens were then thermocycled and immersed in 0.5% fuchsin dye solution. The samples were sectioned longitudinally and observed under a stereomicroscope for assessment of microleakage. The data were analyzed by Kruskal-Wallis, Wilcoxon and Mann-Whitney tests. P<0.05 was considered as the level of significance.Results: Statistical analysis showed a significant difference in the microleakage of gingival margins (P<0.0001), but not in enamel margins (P=0.148). Microleakage at the gingival margins of group (III) was significantly less than that of group (II). Group (I) showed the highest amount of microleakage.Conclusion: Rebonding by a low viscosity resin reduces microleakage at the gingival margins of class V composite restorations, but has no significant effect on the occlusal margins.
The Effect of Galanin on the Mean Plasma of Gonadotropins in Female Goats fed Different Levels of their Energy Requirements
fateme aboutalebi,homayoun khazali
Physiology and Pharmacology , 2009,
Abstract: Introduction: The existence of a close relationship between energy status and reproductive function is well documented, but its underlying mechanisms remain to be fully unfolded.Galanin is an orexigenic agent and has been demonstrated as putative regulator of gonadotropin secretion in rats. There is no study to show the interaction of different levels of energy intake and galanin on gonadotropins secretion in ruminants, therefore the goal of this study was to determine whether galanin affects the mean plasma concentrations of LH and FSH in the female saanen goats fed different energy content in diets. Methods: Nine female saanen goats were randomly divided into 3 groups.Animals of all groups were fed either 50% , 100% and 150% energy content in diet for a month.After a month, goats were received 1μg galanin /kg body weight into their jugular vein.Blood samples were collected every 30 minutes from jugular vein of all goats 3.5h before and 3.5h after injection of galanin.Blood plasma were assayed for plasma LH and FSH concentrations by RIA. Results: Injection of galanin only in 150% dietary energy intake significantly decreased the mean plasma concentrations of LH and FSH whereas in 50% and 100% dietary energy intake , injection of galanin had no effect on the mean plasma concentrations of LH and FSH. Conclusion: These results indicated that galanin may negatively affects mean plasma concentrations of LH and FSH in the female saanen goats only with positive energy balance.
Relationship between information asymmetry and cost of capital
Hosein Kazemi,Fateme Rahmani
Management Science Letters , 2013,
Abstract: Shareholders expected return is normally impacted by informational risk and informational asymmetry, on the other hand, creates informational risk. Thus, investors demand greater risk premium in the case of informational asymmetry and in turn corporate expenditures increase. In this study, we determine the relationship between informational asymmetry and capital cost. The study uses information of 109 companies listed in Tehran Securities Exchange over the period of 2005-2010 and the results suggest a positive and significant relationship between informational asymmetry and capital cost. In addition, the results from present research indicate that when capital markets are competitive, there is not a significant relationship between informational asymmetry and capital cost. But when markets are partially competitive there is a significant relationship between informational asymmetry and capital cost.
Economic Impacts of Tourism Industry
Fateme Tohidy Ardahaey
International Journal of Business and Management , 2011, DOI: 10.5539/ijbm.v6n8p206
Abstract: This article is concerned with the economic impacts of tourism industry, especially in developing countries. It initially reviews the concept and using a model, it deals with the factors affecting the economic impacts associated with tourism. The research findings indicated that with short-term and long-term strategic planning and using the specific abilities and tourism products of developing countries, which suffer from some indices as unemployment, limits in earning and currency flows, inflation and other problems, most of their economic problems can be solved.
Extracting Generalized Semantic Roles from Corpus
Fateme Jafarinejad,Mehrnoush Shamsfard
International Journal of Computer Science Issues , 2012,
Abstract: One of the oldest constructs of linguistic theory is semantic role. Automatic extraction of semantic roles in a sentence is a movement towards semantic processing of texts which has been the focus of attention in recent years. Extraction of semantic roles from a text contains some essential parts. Recognition of verb(s) of the sentence, recognition of noun phrases and their heads, and labeling the role of each phrase in the sentence as a semantic argument of verb are general parts of a system that does this task. There is a wide variety of definitions for semantic roles from verb specific roles to some general roles known as thematic roles, This paper focuses on a generalization of thematic roles called proto-roles or generalized semantic roles which includes two roles; actor and undergoer. In this paper we extract proto-roles in a Persian sentence exploiting POS tags. We use Peykareh as our input corpus and apply a rule based approach to extract actor and undergoer of verb(s).
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