A Numerical anlysis of Resin Transfer Molding

The aim of this work is to study a mathematical model, based on the pseudo-concentration function model, for the filling of shallow molds with polymers. The proposed model is 2-D, the chemical reactivity of the fluid is accounted with the conversion rate satisfying a Kamal-Sourour model, and the temperature is not considered. We prove the existence of a solution of the proposed mathematical model.The aim of this work is to study a mathematical model, based on the pseudo-concentration function model, for the filling of shallow molds with polymers. The proposed model is 2-D, the chemical reactivity of the fluid is accounted with the conversion rate satisfying a Kamal-Sourour model, and the temperature is not considered. We prove the existence of a solution of the proposed mathematical model

Numerical approximation of an identification problem in porous media

When the ground is accidentally polluted with a volatile organic contaminant, it is important to know the amount of this contaminant in liquid form, in this paper it is shown that the concentration in the liquid phase of the volatile organic contaminant can be identified by analyzing the gaseous phase and using inverse problem. In order to do that we consider an inverse problem.When the ground is accidentally polluted with a volatile organic contaminant, it is important to know the amount of this contaminant in liquid form, in this paper it is shown that the concentration in the liquid phase of the volatile organic contaminant can be identified by analyzing the gaseous phase and using inverse problem. In order to do that we consider an inverse problem

Valuation of Quarterly Stock Prices: Applying Ethical Principles to Discounted Cash Flow Method

Even though companies' valuation techniques have evolved and have been developed into more sophisticated methods, there is still a big dilemma in the investing world about finding the price of a company. Our research focus on finding the price for a company's stock by using ethical principles in addition to economical foundation. This paper covers the merger of economic, financial, and ethical factors included in the model and resulting in an intrinsic price using a modified discount cash flow (MDCF) method. Presentation of the model's results were discussed to compare the MDCF stock value to the actual market price. Our inference shows that incorporating ethical principles, like using real economy factors instead of interest rate and using paid taxes in a valuation model can show a better correlation with stock prices compared to regular DCF model prices for the chosen companies. Such model can be developed as a response to investors' choice for ethical strategies for stocks selection strategies as well as assets valuation. Keywords: Valuation Method, Socially Responsible Companies, Stock Selection, and Discounted Cash Flow Method. JEL Classifications: G12; G32; M1

Dynamic Stochastic General Equilibrium model for the Islamic economy

This article is concerned with the debate around the economic knowledge evolution and the role of ethics in economy. It reports on the 2008 crisis, the research literature reveals two main problems: the efficiency of the economic modeling and the failure of the ethical system.The authors explore the use of the new Dynamic Stochastic General Equilibrium “DSGE” model in the case of Islamic economy, it can enable to develop a new approach, taking into account the criticism of the models used before the crisis, and giving more importance to the ethical principles.The question is to know if the principles of Islamic economy feed into a sustainable economic system.The characteristic of this model lies in the consideration of Islamic principles, namely the abolition of interest rates and their replacement by the rate of return of the capital. In this perspective, it is supposed that the intervention of the monetary authorities is done by an unconventional approach. The model also distinguishes itself by the integration of Zakat. The model is applied in the case of Morocco.The results of simulations show that the introduction of these Islamic principles has no negative effects on the macroeconomic and financial conditions of Morocco and that the stability of the economic system is maintained

A new algorithm for approaching Nash equilibrium and Kalai Smoridinsky solution

International audienceIn the present paper, a new formulation of Nash games is proposed for solving general multi-objective optimization problems. The main idea of this approach is to split the optimization variables which allow us to determine numerically the strategies between two players. The first player minimizes his cost function using the variables of the first table P, the second player, using the second table Q. The original contribution of this work concerns the construction of the two tables of allocations that lead to a Nash equilibrium on the Pareto front. On the other hand, we search P and Q that lead to a solution which is both a Nash equilibrium and a Kalai Smorodinsky solution. For this, we proposed and tried out successfully two algorithms which calculate P, Q and their associated Nash equilibrium, by using some extension of Normal Boundary Intersection approach (NBI)

Leveraged buyout booms and busts: can Islamic finance help prevent and mitigate such market distortions?

The industry of private equity and leveraged buyout has been, since its beginnings, subject to several chapters of bubbles and busts, the majority of whom are initiated under similar circumstances (excess of liquidity, junk debt and mimetic behavior).The Islamic finance is a financial system that complies with the rules of the Sharia Law, and which naturally allows the achievements of purposes of Sharia, such as protection of property and capital, fair wealth distribution, reduction of uncertainty and speculation, to name a few.From this perspective, this paper discusses the capacity of Islamic finance to help prevent some factors that trigger financial crises in the leveraged buyout market and to accomplish the intended purposes through this asset class.In the first part of this paper, the authors try to break down some of these common factors that trigger or catalyze the economic booms of the leverage buyout industry, and propose a framework to visualize their effects through an agent-based Simulation program. The second part of the paper describes how Islamic economic principles constitute brakes to some distortions and excesses in the market, in such a way that the probability of occurrence of a boom decreases drastically. Finally, these Islamic features are added up to the simulation to provide a comprehensive benchmark

Study of different strategies for splitting variables in multidisciplinary topology optimization

This paper is devoted to the minimization of the thickness of an elastic structure under competitive loadings. We propose to determine an equilibrium thickness using game theory. We consider two loads exercised separately on two parts of the plate and we aim to optimize both compliances so we deal with a multiloading optimization problem. Firstly, the design variable is taken to be the thickness of the plate. In a second step, we assume that the thickness depends on two independent functions, that we consider as strategies. The multidisciplinary optimization problem is solved as a non-cooperative game and we determine a Nash equilibrium. Finally, some numerical simulations are presented and discuted