Edgar A. Lanzer

• Ph.D.
• Professor at Universidade Federal de Santa Catarina

As maintenance and operation costs increase with usage over time, equipment is replaced when the value of new equipment is more attractive. Some methods have been developed to solve this problem. In the public transport sector, such problems are frequently analyzed by fleet managers and determined by bus age restriction regulations. We propose an I...

This paper presents a multiobjective optimization model to find efficient bus fleet combinations taking into account greenhouse gas emissions, conventional air pollutant emissions and costs. The goal is to minimize, simultaneously, three objective functions, Z1 (CO2 emissions), Z2 (Other Types of Emissions), and Z3 (total costs), for a buses fleet...

A parte amazônica da BR-163 tem sido objeto de debate intenso já por mais de uma década. Alguns estudos mostram uma relação custo/benefício privada muito favorável para o projeto de seu asfaltamento. O principal uso da rodovia será como via de exportação da soja mato-grossense via porto de Santarém, no rio Amazonas. Todavia, os riscos socioambienta...

Neste artigo foi avaliado o desempenho de critérios distintos utilizados para estimativa de equações de previsão de custos de fabricação. Foram utilizados dados reais de variáveis descritivas e custos de 22 moldes de injeção para a estimar os coeficientes de regressão sob quatro critérios distintos: minimização de soma de quadrados dois erros, da s...

The use of constructivist teaching dynamics gives students the opportunity to experience an environment similar to the reality the classroom. It promotes better assimilation of theoretical concepts to be applied in everyday life of future engineers. This research shows us the contribution of Game-Based Learning (GBL) for the study of the proposed t...

Freight transportation is mostly done on roads in Brazil, making this kind of transportation very important for the efficiency and economic productivity of the country. A highly competitive enviroment demand carriers to offer better service levels to customers together with low costs. Therefore it is necessary to know, to analyze and to control all...

This study aims to propose the design of a strategic stock in the process that enables the formation of a production lot-sizing and enables secure services to customers using special steels within the order. The method used was a case study as to whether to propose an improvement needed to better understand and detail the problem in question. This...

Over time, wear in the use of equipment tends to raise its operating costs and maintenance. From one point, it became economically interesting to replace the old equipment with a new one, even without any technological improvement. This observation also applies to equipment such as buses for urban transport. By the nature of public service, urban p...

The Credit Rating Agencies are increasingly important to investors around the globe. This article aims to review research conducted in recent years to identify the consequences of a generalized downgrade of the Sovereign Risk Note upon the economy of an emerging country. The main consequences of a country downgrade found in the literature review we...

This study presents a critical view of the performance evaluation model of Brazilian distribution service operators(DSOs) conducted in the 4th. Cycle of Periodic Tariff Review (TN 66/2015-SRM/SGT/ANEEL). More mature regulation models were used as parameters for the development of this work, besides the scientific references on the methodology used...

The study aims to propose actions for the growth of the e-commerce of a company in the textile sector, and industrial production. We conducted a qualitative and quantitative research using the procedure of case study conducted in a textile and manufacturing company located in southern Brazil. The results revealed that e-commerce in often a source o...

In fashion, printing can be used to compose the surface of the fabrics through a designed and planned creative process involving several steps. The rotary printing is the printing process more used to print fabric in large quantities, with quality and speed. In the process of printing are used several techniques including: reactive, acid, disperse,...

In the textile industry is the spinning process that for optimal performance requires the definition of some quality indicators through laboratory analysis, issued by choosing the most appropriate to the desired objective process. The objective of this article was to study the use of the dowel in the spinning process the open end of the rotor syste...

Replacement of equipment is a complex process for any organization, due to the necessity of a solution that can determine the moment of replacement that corresponds to the lowest possible annualized cost. From a certain point it becomes economically interesting replace the equipment by a new one, even in the absence of any significant technological...

This article describes a study on the features concerned with the validity and reliability of the faculty evaluation tool by using corroboratory and exploratory factorial analyses tecniques. The first hypothesis put forward is that the faculty evaluation model of the Universidade do Sul de Santa Catarina consists of eight correlated dimensions: req...

Today, engineering education, especially for technical subjects, is quite a challenge due to the high amount of new technologies available in the modern world along with the market competition. The current education system finds difficulties to follow the real speed of world's development and its requirements. Besides technological limits, a lack o...

This paper presents a multi-period investment strategy using Data Envelopment Analysis (DEA) in the Brazilian stock market. Results show that the returns based on the DEA strategy were superior to the returns of a Brazilian stock index in most of the 22 quarters analyzed, presenting a significant Jensen's alpha.

Este trabalho apresenta um estudo explorat�rio sobre o marketing nas universidades privadas e comunit�rias brasileiras. Analisa o cen�rio competitivo do ensino superior brasileiro, para demonstrar que a utiliza��o de estrat�gias de marketing � um fator cr�tico de sucesso para essas organiza��es. As barreiras contra o marketing nas universidades nec...

O artigo apresenta uma análise do atual cenário competitivo do Ensino Superior brasileiro, com o objetivo de demonstrar que a utilização de estratégias de marketing é um fator crítico de sucesso para essas organizações. O trabalho trata da existência de barreiras contra uma abordagem de marketing nas universidades, fruto de um modelo de gestão acad...

Starting in the 1970's, the Brazilian agricultural sector has experienced an important process of modernization, whose principal effects include advances in technological progress and gains in productivity. The primary objective of this paper is to analyze technological progress and total productivity growth in the Brazilian agricultural sector dur...

This paper address the issue of performance evaluation - productivity and quality - of academic departments at an University. A DEA model was used to simulate a process of cross-evaluation between departments. The results of DEA in the dimensions of teaching, research, service and quality were modeled as fuzzy numbers and then aggregated through a...

Partithioning in plants means the distribution of dry matter synthetized by photosynthesis between the various parts of the plant (root, leaves, stem and fruits). The gradual change in the distribution between the different growing points of the plant during its development is one of the most important aspects in the study of plant yield and modeli...

A novel control model for technical and economic analysis of fertilizer recommendations is based on Liebig's Law of the Minimum, Mitscherlich's relative yield theory, and the notions of yield plateau and soil fertility carry-over. The empirical model consists of a multistage separable programming specification which maximizes the discounted stream...

The rationale of this study was to jointly estimate response functions for N, P, and K for wheat and soybean cropping in southern Brazil and carryover functions for residual fertility. The two sets of functions were then combined in a dynamic model having general applicability for optimizing fertilizer recommendations. The model is composed of (a)...