Heurísticas usando construção de vocabuilário aplicadas ao problema da atribuição de localidades a anéis em redes SONET/SDH

The SONET/SDH Ring Assignment Problem (PALAS) treats to group localities in form of some rings, being respected the traffic's limitations of the equipment. Each ring uses a DXC (Digital Cross Connect) to make the communication with the others, being the DXC the equipment most expensive of the net, minimizing the number total of rings, will minimize the total net cost, problem's objective . This topology in rings provides a bigger capacity of regeneration. The PALAS is a problem in Combinatorial Optimization of NP-hard Class. It can be solved through Heuristics and Metaheuristics. In this text, we use Taboo Search while we keep a set of elite solutions to be used in the formation of a part of the collection of vocabulary's parts that in turn will be used in the Vocabulary Building. The Vocabulary Building will be started case Taboo Search does not reach the best solution for the instance. Three approaches had been implemented: one that only uses vocabulary's parts deriving of Taboo Search, one that it only uses vocabulary's parts randomly generated and a last one that it uses half come of the elite and half randomly generated

Predição de valores genéticos para a produção de leite no dia do controle e para a produção acumulada até 305 dias

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Estimação de parâmetros genéticos para produção de leite de cabras da raça Alpina

Foram utilizados 9.374 registros semanais de produção de leite de 302 primeiras lactações de cabras da raça Alpina. A produção de leite no dia do controle foi analisada por meio de um modelo animal, unicarater, de regressão aleatória, em que as funções de covariâncias para os componentes genéticos aditivos e de ambiente permanente foram modeladas por meio das funções de Wilmink, Ali e Schaeffer e por polinômios ortogonais, em uma escala de Legendre de ordens cúbica e quíntica. Assumiu-se, ainda, variância residual homogênea durante toda a lactação e heterogênea com três e quatro classes de variância residual. Os modelos foram comparados pelo critério de informação de Akaike (AIC), pelo critério de informação Bayesiano de Schwar (BIC), pela função de verossimilhança (Ln L), pela visualização das estimativas de variâncias genéticas, de ambiente permanente, fenotípicas e residuais e pelas herdabilidades. O polinômio de Legendre de ordem quíntica, com quatro e três classes de variâncias residuais, e a função de Ali e Schaeffer, com quatro classes de variâncias residuais, foram indicados como os mais adequados pelo AIC, BIC e Ln L. Estes modelos diferiram na partição da variância fenotípica para as variâncias de ambiente permanente, genética e residual apenas no início e no final da lactação. Contudo, a função de Ali e Schaeffer resultou em estimativas negativas de correlação genética entre os controles mais distantes. O polinômio de Legendre de ordem quíntica, assumindo variância residual heterogênea, mostrou-se mais adequado para ajustar a produção de leite no dia do controle de cabras da raça Alpina.

Comparações entre os valores genéticos para características de crescimento de bovinos da raça Nelore preditos com modelos de dimensão finita ou infinita

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Preparando pessoas para a qualidade :um estudo na Empresa de Correio do Brasil

This essay aims to analyze different aspects regarding employees satisfaction about their work environment in order to preparethem to deal with quality programs. The study was developed through field and bibliographic research, which was turn in to a comparative analysis between the results obtained in a pilot research and the results from a final research applied to Brazilian Mail enterprise that got the bronze award of the Federal Government Quality Award. The main issue is to define where to act so that employees will be ready to deal with a quality program, identifying why they consider important, their influence in the insertion of the program and the relationship between satisfaction in the work environment and the success of such insertion

Estratégia ambiental e agências de viagens e turismo :um estudo sobre a importância de práticas ambientais na escolha de um pacote turístico

The objective of the work was to investigate, from the vision of travel agents, the importance of environmental practices as a decision factor in the purchase of a tourist package. For in such a way, it was established as target population, the travel agencies and tourism linked to he Brazilian Association of Travel agencies ABAV, hearing the Brazilian travel agents that exerted the function in Natal, city in 2005. The election of the sample was accomplished using the simple random sampling technique. The amount of agents effectively searched was of 150 agents being distributed 150 questionnaires, with closed and opened questions, applied during the month of November in 2005. Results showed great variability of interviewed answers in that if it relates for sale of package tourist where the customer demonstrates enviromental concern with the environmental quality. Through multiple regression analyses, it was environmental concern with the environmental quality of the place and the perception of the practical importance of the existence environmental practices in the place as important factor in the decision of tourist package purchase

Estudo ergonômico do posto de atividade discente em instituição de ensino superior

This research carried through an ergonomic study of the rank of learning activity of a IES, was applied a questionnaire with ergonomic pointers structuralized in scale to intervalar of semantic differential of 0 the 10, in 290 pupils with ages between 18 and 52 years distributed for 5 courses in 9 classrooms, the sample was of the simple random probabilist type. The used statistical techniques had been the descriptive analysis and the analysis of clusters through statistica software 5,0 considering p £ 0,0500. Involving the following 0 variable: Layout; Colors; Acoustics; Illumination; Temperature; Position; Didactic furniture, and Equipment. The gotten results point to consider that the layout of the rooms, the perception of acoustic comfort, the position of the pupils and the furniture of the searched classrooms had been the condicionantes that had been more distinguished negative how much to the perception of comfort of the user. The the 91,5 NPS varied of 57,9 dB(A) values above of recommended for classrooms in accordance with NBR 10152; NR 15; NR 17; It would carry nº 3214/1978, of the Ministry of the Work and searched literature. The Illumination registered interval of 139 the 966 Lux, values are of the limits of interval recommended for classrooms according to NBR 5413 and NR 17. The thermal temperature registered interval of 24° 25,9ºC; URA 41,6 79.1% and the 0.1 air speed 1,0 m/s, values above of recommended for classrooms according to NBR the 6401 and NR 17. The research still suggests that it would have associations between pains in the body the positions of the pupils and the furniture of the classrooms. The results suggest research especially add for the conditions thermal and acoustics of the classrooms

A gestão da qualidade nos cursos de graduação a distância da UFRN/SEDIS : a percepção dos discentes

This dissertation has as objective at analyzing the students' perception about the quality of graduate courses distance of the Federal University of Rio Grande do Norte, which was motivated by the following research problem: the perception that graduate students of the distance of the UFRN have on the quality of the undergraduate? To this end, we sought to gather evidence for a satisfactory approach that addresses the complexity of the subject studied: quality management, distance learning and quality in the Higher Education Institutions. We chose to adopt as a research method, case study on the procedure of the research, exploratory research-descriptive about the objective and quantitative research when tackling the problem. The object of the study were six graduate courses distance UFRN/SEDIS, having as target the students of the courses. The sample was calculated using the Stratified sampling on which 217 students, the courses surveyed were selected. The survey instrument consisted of 21 structured questions, of which seven questions designed to identify the profile of students, seven issues of perceptions (manifest variables) on quality management in distance learning, where students have given values (responses) for 24 statements (which address the central theme of this dissertation) composite based on a 5-point Likert s scale, and six questions about general characteristics that may interfere with students' perception about the quality. Was used as statistical method (data analysis), descriptive statistics and exploratory factor analysis. The results show the identification of four latent factors (obtained by exploratory factor analysis), namely: (1) infrastructure and management - polo presence, (2) teaching-learning processes, (3) communication tools and integration; (4) tutors. We also observed that aspects related to infrastructure and management at the pole face had the lowest score among the factors observed, requiring special attention by the education institution. On the other hand, teachers and teaching learning processes were the items with better performance in the perception of students. It is concluded that the perception of students in relation to quality in distance education courses, the median is trending positive perception, ie the perception of overall quality of the courses is not assertive and unison, but tends to positive perception. Thus, the results, it is expected that the managers of the institution to focus attention on critical points in order to minimize them (or eliminate them) and maximize the positive aspects that are perceived by the students

Responsabilidade social e competitividade :um estudo sobre a influência de práticas sociais na decisão de escolha de um destino turístico

The work objective was to investigate the influence of social practices social in the choise decision of a tourist destination. For in such a way, a survey with the aid of a questionnaire, was used as being the research instrument. The study used a simple random sample without replacement, due to elements of the population had a equal probability different of zero, to be selected for forming part of the sample. The used collection method of data was personal interview. The data was collected at Augusto Severo International Airport at the moment in which tourists were embarking in return to the residence place or another tourist destination. For determination of sample size, it was considered the tourist who had visited Natal in November and December, 2004, supplied by the Secretariat of Tourism in the RN. The sample for the research was of 403 people. Results showed that the interviewed express the existence of high level of competitiveness in the tourism industry. It was observed that 42.5% of the interviewed believes to exist a very aggressive competition, and 47.5% believed that the competition is aggressive in the tourism industry. 10.4% of the interviewed expressed much interest in knowing about social practices in the tourism industry and 2.8% had not presented any interest in knowing about social practices in the tourism industry. For the interviewed, the travel agency image is a significant item in the choice for a tourist package, because of 35.6% believed that this factor is very important in the choice. 5% of the interviewed only find that little important or that sometimes the travel agency image can be seen as s decisive factor in the tourist package choice

Funções de covariância para produção de leite no dia do controle em bovinos Gir leiteiro

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Educação do empreendedorismo: um estudo em instituição de ensino superior

This Thesis deals with entrepreneurship on higher education undergraduate programs. The main objective is investigating the effectiveness of entrepreneurship education in terms of entrepreneurial attitudes and behavior. The study is done on a University that has an entrepreneurship education program on a Business Management undergraduate program. It is conducted a survey using a questionnaire on the Business Management undergraduate students resulting in a random stratified sample of 264 students. The entrepreneurial attitudes variables used are those found on the entrepreneurship literature. The entrepreneurial behavior variables are typical entrepreneurial situations like a decision on how to apply money and if the student would leave a good job to open his or her own company. It is applied multiple regression, cluster, bivariate and chi-square analysis. The main findings are first that it was not found a strong relationship between the entrepreneurial attitudes variables found on the entrepreneurship literature and the behavior situation proposed, with a multiple regression adjusted r2 = 0,30. Second, there is no statistically significant difference among the students comparing different years of the undergraduate program. Finally, the entrepreneurship education in this research appears to be effective in change attitudes toward entrepreneurship but not in changing entrepreneurial behavior. The main theoretical implication is that the entrepreneurship education on higher education level could be effective to change attitudes but changing behavior could goes beyond the possibilities of education on a usual university environment

Acasalamento dirigido para aumentar a produção de animais geneticamente superiores e reduzir a variabilidade da progênie em bovinos

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Modeling of average growth curve in Santa Ines sheep using random regression models

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Análise de desempenho de sistemas distribuídos de grande porte na plataforma Java

The lava Platform is increasing1y being adopted in the development of distributed sys¬tems with higb user demando This kind of application is more complex because it needs beyond attending the functional requirements, to fulfil1 the pre-established performance parameters. This work makes a study on the Java Vutual Machine (JVM), approaching its intemal aspects and exploring the garbage collection strategies existing in the literature and used by the NM. It also presents a set of tools that helps in the job of optimizing applications and others that help in the monitoring of applications in the production envi¬ronment. Doe to the great amount of technologies that aim to solve problems which are common to the application layer, it becomes difficult to choose the one with best time response and less memory usage. This work presents a brief introduction to each one of tbe possible technologies and realize comparative tests through a statistical analysis of the response time and garbage collection activity random variables. The obtained results supply engineers and managers with a subside to decide which technologies to use in large applications through the knowledge of how they behave in their environments and the amount of resources that they consume. The relation between the productivity of the technology and its performance is also considered ao important factor in this choice

Modelagem de equações estruturais na análise de dados de serviços em comunicações móveis

In recent decades, changes have been occurring in the telecommunications industry, allied to competition driven by the policies of privatization and concessions, have fomented the world market irrefutably causing the emergence of a new reality. The reflections in Brazil have become evident due to the appearance of significant growth rates, getting in 2012 to provide a net operating income of 128 billion dollars, placing the country among the five major powers in the world in mobile communications. In this context, an issue of increasing importance to the financial health of companies is their ability to retain their customers, as well as turn them into loyal customers. The appearance of infidelity from customer operators has been generating monthly rates shutdowns about two to four percent per month accounting for business management one of its biggest challenges, since capturing a new customer has meant an expenditure greater than five times to retention. For this purpose, models have been developed by means of structural equation modeling to identify the relationships between the various determinants of customer loyalty in the context of services. The original contribution of this thesis is to develop a model for loyalty from the identification of relationships between determinants of satisfaction (latent variables) and the inclusion of attributes that determine the perceptions of service quality for the mobile communications industry, such as quality, satisfaction, value, trust, expectation and loyalty. It is a qualitative research which will be conducted with customers of operators through simple random sampling technique, using structured questionnaires. As a result, the proposed model and statistical evaluations should enable operators to conclude that customer loyalty is directly influenced by technical and operational quality of the services offered, as well as provide a satisfaction index for the mobile communication segment