Load balancing solution and evaluation of F5 content switch equipment

The Thesis focused on hardware based Load balancing solution of web traffic through a load balancer F5 content switch. In this project, the implemented scenario for distributing HTTPtraffic load is based on different CPU usages (processing speed) of multiple member servers.Two widely used load balancing algorithms Round Robin (RR) and Ratio model (weighted Round Robin) are implemented through F5 load balancer. For evaluating the performance of F5 content switch, some experimental tests has been taken on implemented scenarios using RR and Ratio model load balancing algorithms. The performance is examined in terms of throughput (bits/sec) and Response time of member servers in a load balancing pool. From these experiments we have observed that Ratio Model load balancing algorithm is most suitable in the environment of load balancing servers with different CPU usages as it allows assigning the weight according to CPU usage both in static and dynamic load balancing of servers.

Euroland - The effect of Euro on international trade : Are there winners and losers in this ''Euro-game''?

This paper examines whether European Monetary Union (EMU) countries share fairly the effect of their membership in Eurozone (EZ) or whether are winners and losers in this ''Euro-game''. By using panel data of 27 European Union (EU) Member States for the period 2001-2012 in the context of a gravity model, we focus on estimating the Euro’s effect on bilateral trade and we detect whether this effect differs across the Member States of EZ. Two estimation methods are applied: Pooled OLS estimator and Fixed Effects estimator. The empirical results come to the conclusion that the individual country effects differ and are statistically significant, indicating that EMU’s effect on trade differs across the Member States of EZ. The overall effect of the Euro is statistically insignificant, regardless the estimation method, demonstrating that the common European currency may have no effect on bilateral trade.

A stopping rule while searching for optimal solution of facility-location

Solutions to combinatorial optimization, such as p-median problems of locating facilities, frequently rely on heuristics to minimize the objective function. The minimum is sought iteratively and a criterion is needed to decide when the procedure (almost) attains it. However, pre-setting the number of iterations dominates in OR applications, which implies that the quality of the solution cannot be ascertained. A small branch of the literature suggests using statistical principles to estimate the minimum and use the estimate for either stopping or evaluating the quality of the solution. In this paper we use test-problems taken from Baesley's OR-library and apply Simulated Annealing on these p-median problems. We do this for the purpose of comparing suggested methods of minimum estimation and, eventually, provide a recommendation for practioners. An illustration ends the paper being a problem of locating some 70 distribution centers of the Swedish Post in a region.

Network density and the p-median solution

The p-medianmodel is commonly used to find optimal locations of facilities for geographically distributed demands. So far, there are few studies that have considered the importance of the road network in the model. However, Han, Håkansson, and Rebreyend (2013) examined the solutions of the p-median model with densities of the road network varying from 500 to 70,000 nodes. They found as the density went beyond some 10,000 nodes, solutions have no further improvements but gradually worsen. The aim of this study is to check their findings by using an alternative heuristic being vertex substitution, as a complement to their using simulated annealing. We reject the findings in Han et al (2013). The solutions do not further improve as the nodes exceed 10,000, but neither do the solutions deteriorate.

A empresa produtiva e a racionalidade substantiva : a teoria da ação comunicativa de Jürgen Habermas no ambiente organizacional interativo : de Mary Parker Follett a Collins e Porras

Este estudo trata da possibilidade de as empresas produtivas possuírem elementos característicos das organizações substantivas, tendo como perspectiva geral a construção de um ambiente organizacional integrativo, com base na teoria da ação comunicativa, de Jürgen Habermas e na noção de racionalidade substantiva, de Guerreiro Ramos. Apresenta, a partir dos trabalhos de Mary Parker Follett e de Araujo Santos, o conceito de ambiente organizacional integrativo, que sustenta a identidade de interesses entre trabalhadores e empresa e valoriza aspectos como a auto-realização, o autodesenvolvimento e a satisfação do ser humano, confrontando-o com a realidade do ambiente cultural brasileiro e sua influência nas práticas administrativas. Tendo como ponto de partida a pesquisa empreendida por Maurício Serva sobre o fenômeno das organizações substantivas, empreende, através de estudo de caso, um exame no cotidiano organizacional de uma empresa produtiva brasileira do ramo industrial, de modo a investigar a existência da ação racional substantiva nas suas diversas dinâmicas, processos e práticas administrativas, submetendo-a a uma avaliação com base em uma escala de intensidade da racionalidade substantiva e da racionalidade instrumental. Investiga ainda a possibilidade da existência de integração de interesses entre trabalhadores e empresa, caracterizando assim o ambiente organizacional integrativo.

A general-equilibrium closed-form solution to the welfare costs of inflation (Forthcoming, Revista Brasileira de Economia)

This work presents closed-form solutions to Lucasís (2000) generalequilibrium expression for the welfare costs of ináation, as well as to the di§erence between the general-equlibrium measure and Baileyís (1956) partial-equilibrium measure. In Lucasís original work only numerical solutions are provided.

The Bayesian Foundations of solution concepts of games

We transform a non co-operati ve game into a -Bayesian decision problem for each player where the uncertainty faced by a player is the strategy choices of the other players, the pr iors of other players on the choice of other players, the priors over priors and so on.We provide a complete characterization between the extent of knowledge about the rationality of players and their ability to successfulIy eliminate strategies which are not best responses. This paper therefore provides the informational foundations of iteratively unàominated strategies and rationalizable strategic behavior (Bernheim (1984) and Pearce (1984». Moreover, sufficient condi tions are also found for Nash equilibrium behavior. We also provide Aumann's (1985) results on correlated equilibria .

Unificação monetária e sistema financeiro: o Euro e a América Latina

O processo de unificação monetária europeu é estudado a partir da apresentação da teoria das áreas monetárias ótimas e da estrutura institucional que lhe deu origem. Com base no processo de criação do euro e de seus efeitos na evolução do sistema financeiro, são formuladas questões acerca da propriedade da apliação desta experiência a países emergentes e, em especial, à América Latina.

A contractive method for computing the stationary solution of the euler equation

A contractive method for computing stationary solutions of intertemporal equilibrium models is provide. The method is is implemented using a contraction mapping derived from the first-order conditions. The deterministic dynamic programming problem is used to illustrate the method. Some numerical examples are performed.