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Article
Publication date: 11 November 2021

Joan Carlos Alves Pereira, Wilton Pereira da Silva, Renato Costa da Silva, Cleide Maria Diniz P.S. e Silva and Josivanda Palmeira Gomes

To describe water absorption by the rice grains over time, diffusion and empirical models were used. Also, an optimization software was developed in this study to determine…

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Abstract

Purpose

To describe water absorption by the rice grains over time, diffusion and empirical models were used. Also, an optimization software was developed in this study to determine parameters and their uncertainties for the diffusion models (LS Optimizer, for partial differential equations). Parameters (and their uncertainties) for empirical models were determined by LAB Fit Curve Fitting Software.

Design/methodology/approach

Heat and mass diffusion phenomena are found in various processes of technological interest, including pasteurization, drying and water immersion of agricultural products, among others. The objective of this work was to study the process of water absorption by rice grains with and without husk, using diffusion and empirical models to describe the absorption kinetics. Rice grains were immersed (approximately 10 g for each experiment) in drinking water maintained at constant temperatures of 28, 40 and 50 C. In the experiments, the water contents absorbed by rice grains over time were obtained by the gravimetric method.

Findings

Among empirical models, Peleg was the most satisfactory to describe the kinetics of water absorption by rice without husk, while the Silva et alii model had the best statistical indicators for rice with husk. It was also verified that a diffusion model with boundary condition of the first kind showed the best (or equivalent) results in the description of all processes of kinetics of water absorption by rice grains, with and without husk. For grains without husk, the effective mass diffusivities were (1.186 ± 0.045) × 10−9, (1.312 ± 0.024) × 10−9 and (2.133 ± 0.028) × 10−9 m2 min−1, for the immersion temperatures of 28, 40 and 50C, respectively. For grains with husk, diffusivities were (0.675 ± 0.011) × 10−9 and (1.269 ± 0.017) × 10−9 m2 min−1, for temperatures of 28 and 50 C, respectively.

Originality/value

This work developed a solver for the diffusion equation in cylindrical geometry and presented the LS Optimizer software developed to determine differential equation parameters through experimental data sets.

Details

Engineering Computations, vol. 39 no. 4
Type: Research Article
ISSN: 0264-4401

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Publication date: 23 March 2017

Barbara de Lima Voss, David Bernard Carter and Bruno Meirelles Salotti

We present a critical literature review debating Brazilian research on social and environmental accounting (SEA). The aim of this study is to understand the role of politics in…

Abstract

We present a critical literature review debating Brazilian research on social and environmental accounting (SEA). The aim of this study is to understand the role of politics in the construction of hegemonies in SEA research in Brazil. In particular, we examine the role of hegemony in relation to the co-option of SEA literature and sustainability in the Brazilian context by the logic of development for economic growth in emerging economies. The methodological approach adopts a post-structural perspective that reflects Laclau and Mouffe’s discourse theory. The study employs a hermeneutical, rhetorical approach to understand and classify 352 Brazilian research articles on SEA. We employ Brown and Fraser’s (2006) categorizations of SEA literature to help in our analysis: the business case, the stakeholder–accountability approach, and the critical case. We argue that the business case is prominent in Brazilian studies. Second-stage analysis suggests that the major themes under discussion include measurement, consulting, and descriptive approach. We argue that these themes illustrate the degree of influence of the hegemonic politics relevant to emerging economics, as these themes predominantly concern economic growth and a capitalist context. This paper discusses trends and practices in the Brazilian literature on SEA and argues that the focus means that SEA avoids critical debates of the role of capitalist logics in an emerging economy concerning sustainability. We urge the Brazilian academy to understand the implications of its reifying agenda and engage, counter-hegemonically, in a social and political agenda beyond the hegemonic support of a particular set of capitalist interests.

Details

Advances in Environmental Accounting & Management: Social and Environmental Accounting in Brazil
Type: Book
ISBN: 978-1-78635-376-4

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Article
Publication date: 29 October 2021

Edwin Sallica-Leva, Fernando Henrique da Costa, Cláudio Teodoro Dos Santos, André Luiz Jardini, Jorge Vicente Lopes da Silva and João Batista Fogagnolo

This paper aims to describe the obtainment of Ti-6Al-4V parts with a hierarchical arrangement of pores by additive manufacturing, aiming at designing orthopedic implants.

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Abstract

Purpose

This paper aims to describe the obtainment of Ti-6Al-4V parts with a hierarchical arrangement of pores by additive manufacturing, aiming at designing orthopedic implants.

Design/methodology/approach

The experimental methodology compares microstructural and mechanical properties of Menger pre-fractal sponges of Ti-6Al-4V alloy, manufactured by laser powder bed fusion (LPBF) and electron beam powder bed fusion (EBPBF), with three different porosity volumes. The pore arrangement followed the formation sequence of the Menger sponge, with hierarchical order from 1 to 3.

Findings

The LPBF parts presented a martensitic microstructure, while the EBPBF parts presented an α + ß microstructure, independently of its wall thickness. The LPBF parts presented higher mechanical resistance and effective stiffness than the EBPBF parts with similar porosity volume. The stiffness values of the Menger pre-fractal sponges of Ti-6Al-4V alloy, between 4 and 29 GPa, are comparable to those of the cortical bone. Furthermore, the deformation behavior presented by the Menger pre-fractal sponges of Ti-6Al-4V alloy did not follow the Gibson and Ashby model's prediction.

Originality/value

To the best of the authors' knowledge, this is the first study to obtain Menger pre-fractal sponges of Ti-6Al-4V alloy by LPBF and EBPBF. The deformation behavior of the obtained porous parts was contrasted with the Gibson and Ashby model's prediction.

Details

Rapid Prototyping Journal, vol. 28 no. 4
Type: Research Article
ISSN: 1355-2546

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Article
Publication date: 13 October 2023

Eduardo André Cândido Da Silva, Flávio Santino Bizarrias, Renato Penha, Luciano Ferreira da Silva and Cristiane Drebes Pedron

Despite the significant interest from researchers and practitioners, the literature on project value measurement from the perspective of the customer is non-existent. This study…

302

Abstract

Purpose

Despite the significant interest from researchers and practitioners, the literature on project value measurement from the perspective of the customer is non-existent. This study aims to address this gap by developing and validating a scale to measure project value through a customer lens called the customer perception of project value scale.

Design/methodology/approach

A list of items was initially generated based on 762 sample responses through a systematic review of the literature and with the participation of specialists. Exploratory and confirmatory factorial analyses and structural equation modelling were used to develop and validate the scale.

Findings

The authors formulated a four-dimension scale. The dimensions used to measure the second-order construct are customer centrality, process, delivery and cost-benefit. This was validated using a nomological structure.

Research limitations/implications

The non-consensual nature of what is value in projects restricts the results of this study to the context of a specific group of stakeholders only, that is, the consumers of the projects. The authors also see limitations in the absence of competing scales, which do not allow the comparison of the instrument with alternative measures.

Practical implications

This study allows project managers and other professionals to measure a project’s perceived value from the customer’s point of view and manage the improvement of this perception.

Originality/value

To the best of the authors’ knowledge, this is the first study to propose a scale to measure project value, which advances the literature on project management and value and contributes to academic knowledge and practice by measuring project value from the customer standpoint.

Details

European Business Review, vol. 36 no. 3
Type: Research Article
ISSN: 0955-534X

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Article
Publication date: 4 July 2022

Ana Flávia Ramos, Gabriela da Rocha Lemos Mendes, Renato Souza Cruz, Fabiane Neves Silva, Geany Peruch Camilloto, Handray Fernandes de Souza, Juliana Pinto de Lima, Caroline Liboreiro Paiva and Igor VIana Brandi

Baru is a fruit of the Brazilian Cerrado, important to the local economy and social culture. The use in food formulation is due to it being highly available and its nutritional…

273

Abstract

Purpose

Baru is a fruit of the Brazilian Cerrado, important to the local economy and social culture. The use in food formulation is due to it being highly available and its nutritional profile; however, the changes in the texture of products are still unclear. In this study, an experimental design was conducted to develop cakes by replacing different levels of wheat flour with baru nut flour, and comparing them.

Design/methodology/approach

Cakes were developed with 20, 40, 60, and 80 replacement of wheat flour by baru nut flour and compared with standard formulation (100% wheat flour). The physical-chemistry composition of the flour, nutritional composition of the cakes and texture profile analysis were evaluated.

Findings

Baru nut flour showed greater protein, lipids, and ash than wheat flour, and this result was also observed in the cakes developed. The cake with 80% of almond baru flour showed an increase of 60.3% in protein. The texture profile analysis showed that the addition of baru nut flour affected the texture of products. The cakes showed more hardness and chewiness; however, the springiness and cohesiveness were decreased.

Originality/value

The findings of this study demonstrate that baru nut flour is a great option as a new ingredient for bakery products, due the increase of protein. This is the first study analyzing the effect of baru nut flour addition on the texture profile of bakery products. These results can orientate future studies, especially sensory assays.

Details

British Food Journal, vol. 125 no. 4
Type: Research Article
ISSN: 0007-070X

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Article
Publication date: 17 October 2019

Clarice Secches Kogut, Renato Dourado Cotta de Mello and Angela da Rocha

Starting from the knowledge-based view as a theoretical perspective, this study aims to examine how an emerging market multinational enterprise (EMMNE) engages in reverse…

581

Abstract

Purpose

Starting from the knowledge-based view as a theoretical perspective, this study aims to examine how an emerging market multinational enterprise (EMMNE) engages in reverse knowledge transfer (RKT) processes and how such processes are managed by headquarters. Therefore, this paper captures the perspective of top management concerning RKT and the processes used to create, transfer and integrate knowledge.

Design/methodology/approach

The study uses a longitudinal design based on the case method of investigation. The case selected for the study was a Brazilian company theoretically sampled for being a domestically, regionally and globally important, information-rich company that operates in an industry in which technology plays a crucial role. The company was also selected for having had asset-seeking motives in at least some of its foreign market entries and for having successfully absorbed foreign-acquired capabilities.

Findings

The study provides counterfactual evidence to the springboard perspective, considering timing and speed of the internationalization and catch-up processes and the size of acquisitions. The study also highlights differences to other emerging market multinational enterprises, concerning the internationalization trajectory and catch-up moves, and to traditional MNEs, regarding RKT challenges and practices.

Research limitations/implications

The main limitations of the study relate to the case study method, which does not allow for statistical generalization, although it does support analytical generalization.

Originality/value

The study contributes to the literature by shedding light on the process by which a Latin American multinational firm developed technological capabilities to compete globally, focusing on the symbiotic, self-nurturing relationship between internationalization processes and technology acquisition and integration processes. Moreover, the work provides novel theoretical insights regarding timing, location, size and execution of the RKT activities. Finally, the paper contributes to the understanding of the relational aspects of the RKT process by focusing on building human relationships as the major force behind knowledge integration and examining the resistance of the acquired companies from developed markets to adopt the parent company’s best practices, or to contribute to its integrated knowledge, when the parent company is an EMMNE.

Details

Multinational Business Review, vol. 28 no. 2
Type: Research Article
ISSN: 1525-383X

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Article
Publication date: 14 March 2022

José Luis Dávila, Bruna Maria Manzini, Marcos Akira d'Ávila and Jorge Vicente Lopes da Silva

This study aims to report the development of an open-source syringe extrusion head for shear-thinning materials. The target is to adapt open-source 3D printers to be helpful in…

529

Abstract

Purpose

This study aims to report the development of an open-source syringe extrusion head for shear-thinning materials. The target is to adapt open-source 3D printers to be helpful in research lines that use gels, hydrogels, pastes, inks, and bio-inks.

Design/methodology/approach

This hardware was designed to be compatible with a Graber i3-based 3D printer; nevertheless, it can be easily adapted to other open-source 3D printers.

Findings

The extrusion head successfully deposits the material during the 3D printing process. It was validated fabricating geometries that include scaffold structures, which are a possible application of bioprinting for tissue engineering. As reported, the extruded filaments allowed the porous samples' structuration.

Practical implications

This system expands the applications of open-source 3D printers used at the laboratory scale. It enables low-cost access to research areas such as tissue engineering and biofabrication, energy storage devices and food 3D printing.

Originality/value

The open-source hardware here reported is of simple fabrication, assembly and installation. It uses a Cardan coupling and a three guides system to transfer the stepper motor motion. This approach allows continuous movement transfer to the syringe piston, producing an adequate deposition or retraction. Thus, the effect of misalignments is avoided, considering that these latter can cause skipping steps in the motor, directly affecting the deposition.

Details

Rapid Prototyping Journal, vol. 28 no. 8
Type: Research Article
ISSN: 1355-2546

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Abstract

Details

International Journal of Sociology and Social Policy, vol. 12 no. 4/5/6/7
Type: Research Article
ISSN: 0144-333X

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Article
Publication date: 16 August 2024

Vagner Batista Ribeiro, Julio Cesar Melo, Jorge Muniz Jr., Fernando Bernardi de Souza and Renato Cardoso Canever

This paper aims to investigate the impacts of Industry 4.0/5.0 (I4.0/5.0) on the glass manufacturing workplace. Specifically, it studied the workplace, which represents complex…

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Abstract

Purpose

This paper aims to investigate the impacts of Industry 4.0/5.0 (I4.0/5.0) on the glass manufacturing workplace. Specifically, it studied the workplace, which represents complex manufacturing lines of high variety and volume of products.

Design/methodology/approach

A case study based on semi-structured interviews was conducted with managers responsible for I4.0 implementation, and the responses were treated by content analysis.

Findings

Findings reinforce I5.0 aspects to be considered in terms of work organization. The interviewees highlight work and human factors as important for technology implementation, which includes workers tasks, skills, nature of work, human resources development, hiring process and organizations strategies. It was also found that knowledge sharing poses a huge challenge.

Originality/value

In lieu of gaps in the literature, this research further discusses management challenges to support digital transformation and impacts on workers and organizations.

Details

The Learning Organization, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 0969-6474

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Article
Publication date: 20 February 2024

Julianna Paola Ramirez Lozano, Percy Samoel Marquina Feldman and Renato Peñaflor Guerra

This study aims to understand the leadership characteristics of founders of social and environmental enterprises in Latin America who have achieved business success with a focus…

216

Abstract

Purpose

This study aims to understand the leadership characteristics of founders of social and environmental enterprises in Latin America who have achieved business success with a focus on sustainability despite difficult social, economic, political and even health contexts in which they live.

Design/methodology/approach

This nonexperimental research is a qualitative, descriptive and exploratory study. Twenty-one in-depth interviews were conducted with social/environmental entrepreneurs of the Kunan Network (an organization that groups the entrepreneurial ecosystem in Peru).

Findings

The study analyzes the leadership profile and characteristics of entrepreneurs who have created profitable businesses with a social/environmental focus that solve relevant social problems and contribute to improving people’s quality of life and caring for the environment.

Research limitations/implications

Although only 21 business leaders with outstanding participation and positive social and environmental impact were included in this study, they were supported and recognized by the Kunan Network.

Originality/value

The study contributed to the conceptualization and understanding of the profile of leaders of social and environmental enterprises, whose main challenges are to solve social or environmental problems of society and contribute to improving the quality of life of people and the environment. Knowing the profile of these entrepreneurs generates value to the knowledge of the subject and contributes to understand and propose strategies to improve the ecosystem of social-environmental entrepreneurship in emerging countries such as Peru. This will contribute to the creation of relationships and alliances with various social actors: public, private, third sector, academia, among others, for the management and promotion of sustainable business.

Objetivo

El estudio busca conocer las características de liderazgo de los fundadores de empresas sociales y ambientales en América Latina que lograron el éxito de sus negocios desde un enfoque de sostenibilidad a pesar del difícil contexto social, económico, político e incluso sanitario en el cual viven.

Diseño/metodología/enfoque

En la investigación no experimental de tipo estudio cualitativo, descriptivo y exploratorio, se realizaron 21 entrevistas en profundidad a emprendedores socio/ambientales de la Red Kunan (organización que agrupa el ecosistema emprendedor en el Perú).

Resultados

El estudio analiza el perfil de liderazgo y las características que tienen los emprendedores que crearon negocios rentables con enfoque social/ambiental que resuelven problemas sociales relevantes y contribuyen al mejoramiento de la calidad de vida de las personas y al cuidado del ambiente.

Limitaciones/implicaciones de la investigación

El estudio incluyó solo a 21 líderes emprendedores con destacada participación y impacto social y ambiental positivo, sin embargo es importante el reconocimiento y respaldo que estos tienen de parte de la Red Kunan.

Originalidad/valor

El estudio contribuyó a la conceptualización y comprensión del perfil de los líderes de empresas sociales y ambientales cuyos principales desafíos son resolver problemas sociales y/o ambientales de la sociedad y contribuir al mejoramiento de la calidad de vida de las personas y del medio ambiente. Conocer el perfil de estos emprendedores creemos que genera valor al conocimiento del tema y contribuye a entender y proponer estrategias para mejorar el ecosistema del emprendimiento social/ambiental en países emergentes como el peruano; lo cual contribuye a generar relaciones y alianzas con diversos actores sociales: públicos, privados, tercer sector, academia, entre otros para la gestión y promoción de negocios sostenibles.

Objetivo

O estudo procura conhecer as características da liderança dos fundadores das empresas sociais e ambientais na América Latina que alcançaram o sucesso desde uma abordagem sustentável apesar do contexto social, econômico, político e sanitário difícil no qual vivem.

Desenho/metodologia/abordagem

Na pesquisa não experimental de tipo de estudo qualitativo, descritivo e exploratório, se realizaram 21 entrevistas detalhadas a empreendedores socio/ambientais da Kunan Rede (organização que agrupa o ecossistema empreendedor no Peru).

Recomendações

O estudo analisa o perfil de liderança e as características dos empreendedores que criaram negócios rentáveis com uma abordagem socioambiental que resolvem problemas sociais relevantes e contribuem ao melhoramento da qualidade de vida das pessoas e ao cuidado do meio ambiente.

Limitações/implicações da pesquisa

O estudo só incluiu 21 líderes empreendedores com destacada participação e um impacto socioambiental positivo. Não obstante, é importante mencionar que aqueles líderes têm o reconhecimento e apoio da Kunan Rede.

Originalidade/valor

O estudo contribui para a conceptualização e compreensão do perfil dos líderes de empresas sociais e ambientais e cujos desafios principais são resolver problemas sociais e/ou ambientais da sociedade e ajudar ao melhoramento da qualidade de vida das pessoas e do meio ambiente. Conhecer o perfil desses empreendedores pode gerar valor ao conhecimento do tema e ajudar ao seu entendimento e propor estratégias para aprimorar o ecossistema do empreendedorismo socioambiental em países emergentes como Peru, assim pode contribuir ao relacionamento e parcerias com diversos atores sociais do setor público, privado, terceiro setor, academias, entre outros, para a gestão e promoção de negócios sustentáveis.

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