Abstract Two novel synthesized compounds (FD and ACP) have been applied as inhibitors for MS corrosion in HCl and H2SO4 solutions. Gravimetric, PDP, EIS, SEM and theoretical approaches were employed for the investigation of FD and ACP synthesized compounds IE%. Their corrosion IE% and calculated quantum chemical properties were comparable to each other, and indicated that ACP is a slightly less effective inhibitor than FD in HCl and H2SO4 solutions. Langmuir’s, Temkin’s, Frumkin’s and Freundlich’s adsorption isotherms were used for describing the inhibitors adsorption behavior. The adsorption was spontaneous and followed a mixed mechanism, but with initial physisorption. Polarization data revealed that the inhibitors were more cathodic, because they tended to enforce MS HER retardation. The inhibitors decreased the electrolyte impedance, while Rct increased. The adsorption mechanism was influenced by the protonation and solvation environment, and it was concentrated within the heteroatoms and the aromatic systems. Calculated quantum parameters agreed effectively with the obtained experimental results, while FF indices were useful for predicting the nucleophilic and electrophilic attacks positions.

Resumo Este artigo aborda um estudo de caso em uma indústria de bebidas relativo ao Problema de Roteamento de Veículos Assimétrico com Frota Heterogênea Limitada (PRVAFHL). O objetivo é definir as rotas dos veículos de modo a reduzir os custos de distribuição. O PRVAFHL pertence à classe NP-difícil, isto é, sua resolução por meio de métodos exatos é uma tarefa extremamente árdua. Problemas desta natureza são geralmente tratados na prática de forma heurística. Dentre as diversas abordagens existentes, optou-se por realizar uma adaptação de uma heurística da literatura que se mostrou eficiente, sendo capaz de gerar soluções de qualidade elevada em um tempo de execução aceitável. Experimentos computacionais foram realizados em um conjunto de 7 instâncias obtidas junto à empresa em questão. Os resultados obtidos mostram que houve uma redução considerável no número de veículos utilizados e na distância total percorrida em relação às soluções adotadas pela empresa.

Abstract This article deals with a case study in a beverage industry concerning the Asymmetric Vehicle Routing Problem with Heterogeneous Limited Fleet (AVRPHLF). The objective of the present paper is to define the vehicle routes so as to reduce distribution costs. The AVRPHLF belongs to the NP-hard class, that is, its resolution through exact methods is an extremely hard task. In practice, problems of this nature are generally treated via heuristics. Among the various solution approaches, we decided to perform an adaptation of a heuristic from the literature that has proved to be efficient, capable of generating high-quality solutions in a reasonable execution time. Computational experiments were conducted in a set of seven instances obtained from the company in question. The results obtained show that there was a considerable reduction in the number of vehicles used and in the total distance traveled with respect to the solutions adopted by the company.

Um ambiente ergonômico ideal para exercer-se atividades bancárias precisa estar termicamente adequado, principalmente segundo a percepção térmica daqueles que realmente promovem a produtividade: os seres humanos. Esta pesquisa possibilitou conhecer-se as características termoambientais destas atividades e, a partir dos dados coletados, aplicou-se o método da Regressão Linear e a técnica exploratória Análise Discriminante para determinar quais variáveis térmicas representam melhor a sensação térmica declarada pelo trabalhador. Para isso, determinaram-se as variáveis do balanço térmico e a sensação térmica de cada trabalhador, baseando-se em normas internacionais. Constatou-se que a temperatura de bulbo seco foi a variável que representou melhor estas preferências e, em situação de conforto, 23,79ºC é a temperatura ideal para que estas atividades sejam exercidas com satisfação térmica.

An ergonomically ideal environment for bank services needs to be thermally adequate, mainly according to the thermal perceptions of those responsible for the productivity, namely, human beings. This research has made it possible to recognize the relevant thermo-environmental characteristics of these activities and, based on the collected data, to apply the Linear Regression method and Discriminant Analysis exploratory technique to determine the thermal variables that may best represent the employee's reported thermal sensations. For this purpose, the variables of thermal balance and sensation of each worker were determined, based on available international standards. It was found that the dry bulb temperature was the one that better represented these preferences. In the comfort situation, 23.79ºC was the ideal temperature for these activities to be performed with thermal satisfaction.