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Article
Publication date: 10 June 2020

Camila Fernandes Higa, Thatyanne Gradowski, Selene Elifio-Esposito, Marcelo Fernandes de Oliveira, Paulo Inforçatti, Jorge Vicente Lopes da Silva, Fred Lacerda Amorim and Michelle Sostag Meruvia

This study aims to investigate the production of scaffolds by selective laser sintering (SLS) using poly(vinyl alcohol) (PVA) polymer, for in vitro studies, a relatively…

Abstract

Purpose

This study aims to investigate the production of scaffolds by selective laser sintering (SLS) using poly(vinyl alcohol) (PVA) polymer, for in vitro studies, a relatively new and growing area in which scaffolds could be used in the design of three-dimensional models for in vitro disease model or tissue equivalent for safety and effectiveness tests.

Design/methodology/approach

The influence of the SLS process parameters laser power, 26 W and 32 W, and number of laser scans, 1, 2, 4 and 6, on the surface microstructure of the samples and on the degree of crystallinity and chemical stability of PVA material, was investigated using powder with particle size of 20-320 µm. Laser sintered PVA samples were subjected to cell culture tests using osteoblastic cells derived from human osteosarcoma (SaOs-2).

Findings

The laser power has no significant influence on the microstructure of the laser-sintered samples, however the number of scans has a considerable influence on the sintering degree; the SLS process causes a decrease in the degree of crystallinity and changes the chemical structure of the as-received PVA, especially when using higher laser power and more number of scans. Preliminary in vitro cell culture tests show that the laser-sintered PVA material is biocompatible with SaOs-2 cells.

Originality/value

SLS offers good potential for the fabrication of scaffolds and thus, may be applied as an alternative to conventional scaffold fabrication processes to overcome their limitations.

Details

Rapid Prototyping Journal, vol. 26 no. 6
Type: Research Article
ISSN: 1355-2546

Keywords

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Article
Publication date: 1 January 1994

ALEXANDRE PIANTINI and JORGE M. JANISZEWSKI

Lightning discharges are considered to be responsible for a significant amount of interruptions in power distribution systems. Due to the importance of this subject, a…

Abstract

Lightning discharges are considered to be responsible for a significant amount of interruptions in power distribution systems. Due to the importance of this subject, a research on lightning induced voltages is being developed at the University of São Paulo.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 13 no. 1
Type: Research Article
ISSN: 0332-1649

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Article
Publication date: 29 June 2012

Jorge Rady de Almeida Junior, Magali Andreia Rossi, Mário Corrêa, Javier Francisco Ramirez‐Fernandez, Vicente Carlos Poli and Genivaldo José de Menezes

The purpose of this paper is to present a method to analyze the noise in aircraft cabins through the VHF Aeronautical Communication Channel, aimed at examining an…

Abstract

Purpose

The purpose of this paper is to present a method to analyze the noise in aircraft cabins through the VHF Aeronautical Communication Channel, aimed at examining an environment that has the possibility of communication problems between the aircraft crew and the professionals responsible for the controls on land.

Design/methodology/approach

This analysis includes equipment normally used for identification and comparison of electromagnetic noise, the cabin and the environment that are present in an airport, as well as equipment for frequency analysis and intensity of those signals. The analysis is done in a reverse way, eliminating situations that are not common in the examined environment, until the identification of the situation with the irregularity.

Findings

According to the results, the implementation of the Fourier transform for noise analysis in the cabin was efficient. These results demonstrate that through this transformation, the noise sources can be identified in the environments in cases where there is much spectrum pollution.

Research limitations/implications

This kind of noise analysis is important, considering the importance of having good accuracy in airport environment analysis.

Originality/value

The paper presents the main trends in the future of aviation communications, and describes the new applications that aim to minimize problems with the current VHF channel.

Details

Aircraft Engineering and Aerospace Technology, vol. 84 no. 4
Type: Research Article
ISSN: 0002-2667

Keywords

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Article
Publication date: 4 January 2011

Charbel Jose Chiappetta Jabbour, Fernanda Serotini Gordono, Jorge Henrique Caldeira de Oliveira, Jose Carlos Martinez and Rosane Aparecida Gomes Battistelle

The objective of this study was to analyze the major challenges and benefits of diversity management in Brazilian companies by assessing the role of human resources.

Abstract

Purpose

The objective of this study was to analyze the major challenges and benefits of diversity management in Brazilian companies by assessing the role of human resources.

Design/methodology/approach

A total of 15 case studies were carried out on companies that operate in Brazil. Brazil is a country with considerable diversity and multiracial backgrounds.

Findings

It was found that diversity management in Brazilian companies is still an emerging issue, and the major challenges are related to discriminatory actions taken by coworkers. Among the 15 companies studied, only four had adopted a consistent set of diversity management and human resources practices. These four companies were the only companies to affirm that diversity management requires the strong support of top management and continuous organization to sustain efforts toward incorporating diversity.

Originality/value

Research studies on diversity management in Brazil are scarce. The findings of this study, however, can be useful to academic professionals and company directors in countries that exhibit similar characteristics to those of Brazil, or to those who are interested in learning more about Brazil.

Details

Equality, Diversity and Inclusion: An International Journal, vol. 30 no. 1
Type: Research Article
ISSN: 2040-7149

Keywords

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Book part
Publication date: 23 July 2015

Abstract

Details

Tourism Research Frontiers: Beyond the Boundaries of Knowledge
Type: Book
ISBN: 978-1-78350-993-5

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Article
Publication date: 8 April 2020

Stefania A.B. Queiroz, Glauco H.S. Mendes, Jorge H.O. Silva, Gilberto M.D. Ganga, Paulo A. Cauchick Miguel and Maicon G. Oliveira

This study aims to examine the impact of the servitization on the performance of small and medium enterprises (SMEs) in Brazil.

Abstract

Purpose

This study aims to examine the impact of the servitization on the performance of small and medium enterprises (SMEs) in Brazil.

Design/methodology/approach

The study uses data from Brazilian SMEs and applies partial least squares structural equation modeling (PLS-SEM) to test the research hypotheses.

Findings

The findings suggest a positive relationship between servitization and SME performance. It is found that the strategy of offering base services does impact SME performance. Furthermore, servitization aims to promote a fit between environmental pressures and SME performance.

Practical implications

SMEs can use servitization to increase their performance in spite of their resources restrictions, size limitation and low level of service revenue. However, the adoption of servitization should be accompanied by managerial adjustments in servitization practices.

Originality/value

This paper is dedicated to investigating the servitization-performance relationship in the context of SMEs, which is not a usual research publication. Moreover, it adds to the servitization theory by demonstrating that it is not necessary to reach a critical mass of services to be profitable and base services may be also a source of revenues and profits.

Details

Journal of Business & Industrial Marketing, vol. 35 no. 7
Type: Research Article
ISSN: 0885-8624

Keywords

Content available
Article
Publication date: 25 September 2018

Rogerio Scabim Morano, Alcides Barrichello, Rafael Ricardo Jacomossi and Jorge Ramon D’Acosta-Rivera

The purpose of this study is to evaluate whether the perceptions of cleanliness and organization of the point of sale, hygiene and training of those who serve the public…

Abstract

Purpose

The purpose of this study is to evaluate whether the perceptions of cleanliness and organization of the point of sale, hygiene and training of those who serve the public (service) and healthiness of the products, constitute a base for the perception of the quality of food sold in the street. Studies about development of street food trade have gained relevance in academic debate because of its social and economic significance. Usually, aspects related to sanitary issues are presented, and the factors that influence consumer perception regarding quality of food consumed are less explored. This was the focus of this work. The relationships among possible predecessors – attendance, cleanliness, organization and healthiness – were tested, all acting together, influencing the variable perception of product quality. Competitive models were tested because of theoretical divergences regarding the relationship between quality and healthiness, not yet totally clear in the literature.

Design/methodology/approach

A quantitative survey was carried out in the city of Diadema (SP, Brazil), getting 603 respondents, with data and theoretical models analyzed by structural equation modeling.

Findings

Results indicated that organization variable is not significant regarding perception of product quality, while attendance and healthiness directly affect this perception. On the other hand, cleanliness influences perceived healthiness and this, in turn, reinforces perception of product quality.

Practical implications

The focus of street food traders should be on clerk cleanliness and politeness (characteristics related to the service) that end up influencing the perception that the consumer develops regarding healthiness (characteristic related to product quality).

Originality/value

Usually research studies on this theme include only aspects related to sanitary and safety issues, and those which focus on consumer perception of food quality cover conventional outlets such as bars and restaurants. There are few ones performed as in this study that analyze street food consumer behavior regarding his/her perception of quality, cleanliness, care received, among others.

Details

RAUSP Management Journal, vol. 53 no. 4
Type: Research Article
ISSN: 2531-0488

Keywords

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Book part
Publication date: 30 May 2017

Fábio Henrique Pereira

This chapter examines the professional identities of Brazilian journalists. It does so through an analysis of the growing professional autonomy of journalism from 1950 to…

Abstract

This chapter examines the professional identities of Brazilian journalists. It does so through an analysis of the growing professional autonomy of journalism from 1950 to 1990 through the life stories of 10 intellectual-journalists, individuals whose journalistic activities have crossed over into other intellectual fields.

This study applies a symbolic interactionist framework to understand how these actors managed their reputations and careers within the intellectual world. The narratives were taken from qualitative semi-structured interviews, and supported by additional research such as interviews, biographies, and articles which have been published about their lives.

The life stories were compared to the extensive structural changes affecting the world of journalism and the world of intellectuals in Brazil. This comparison revealed gaps between these two spheres of practice, within which the ambivalent form of journalists’ identities have been constructed.

This chapter offers two contributions to the study of Brazilian journalists. From a theoretical and methodological viewpoint, it advances beyond other studies that focus more on the prevailing representations of journalists’ professional identities and their role in society. From an empirical standpoint, it describes the complex negotiations between the worlds of journalism, culture and politics. This chapter also reexamines the current dominant explanation for the changes in Brazilian journalism. It shows that building careers and new levels of interpersonal cooperation for intellectuals and journalists has been a slow process. Ultimately, this development has left some behind, especially those actors stretched between multiple professional identities such as those who self-identify as intellectual-journalists.

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Book part
Publication date: 23 July 2015

Teresa Cristina de Miranda Mendonça

This chapter, drawing on an anthropological perspective, explicates the process of tourism development and its implications for Ilha Grande in Angra dos Reis, Rio de…

Abstract

This chapter, drawing on an anthropological perspective, explicates the process of tourism development and its implications for Ilha Grande in Angra dos Reis, Rio de Janeiro, Brazil. The concept of tourismization, influenced by Norbert Elias’s sociological perspective on the “civilizing process,” is introduced to illustrate how social changes and society-individual relationships within this community can be perceived as a set of configurations and articulations, which are mediated by tourism. It is suggested that tourisimization can be perceived as a process which dictates the rules and new customs to be followed by people influenced by new local configurations mediated by tourism.

Details

Tourism Research Frontiers: Beyond the Boundaries of Knowledge
Type: Book
ISBN: 978-1-78350-993-5

Keywords

Content available
Article
Publication date: 22 June 2018

Jorge Ramón D’Acosta Rivera, Rafael Ricardo Jacomossi, Alcides Barrichello and Rogerio Scabim Morano

The purpose of this paper is to analyze patterns and trends of articles that present the use of structural equation modeling (SEM) and that were published in several…

Abstract

Purpose

The purpose of this paper is to analyze patterns and trends of articles that present the use of structural equation modeling (SEM) and that were published in several Brazilian journals. In addition, this paper maps the institutions where the authors of the identified articles are affiliated, and discusses aspects of searching the articles in journals’ archives and other scientific databases.

Design/methodology/approach

The work used bibliometrics, which is one of the forms of evaluation and measurement of information flows in scientific knowledge, using mathematical and statistical methods.

Findings

The study showed an exponential growth in using SEM in several areas in recent years, with predominance in marketing. Most of the publications were produced by authors from institutions such as USP, FGV and UFRGS, but most authors published only one article using SEM. Almost all published articles used one of the three most common software, especially AMOS®. Surprisingly, many articles did not mention the software used, indicating methodological flaw.

Practical implications

Weaknesses were found regarding the search for articles in the different sources used, indicating that, for literature reviews, the research should be conducted in several databases in a complementary way and not alternatively. This fact becomes critical especially when expressions in languages other than Portuguese were used. This situation suggests an aggravating lack of visibility for the Brazilian scientific community since the articles are less likely to be found.

Originality/value

The paper shows that among the various techniques of multivariate data analysis used in the field of administration, SEM has gained prominence being operationalized using specific software.

Details

Revista de Gestão, vol. 25 no. 3
Type: Research Article
ISSN: 2177-8736

Keywords

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