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Article
Publication date: 4 June 2020

Bernardo Lourenço, Tiago Madeira, Paulo Dias, Vitor M. Ferreira Santos and Miguel Oliveira

2D laser rangefinders (LRFs) are commonly used sensors in the field of robotics, as they provide accurate range measurements with high angular resolution. These sensors can be…

108

Abstract

Purpose

2D laser rangefinders (LRFs) are commonly used sensors in the field of robotics, as they provide accurate range measurements with high angular resolution. These sensors can be coupled with mechanical units which, by granting an additional degree of freedom to the movement of the LRF, enable the 3D perception of a scene. To be successful, this reconstruction procedure requires to evaluate with high accuracy the extrinsic transformation between the LRF and the motorized system.

Design/methodology/approach

In this work, a calibration procedure is proposed to evaluate this transformation. The method does not require a predefined marker (commonly used despite its numerous disadvantages), as it uses planar features in the point acquired clouds.

Findings

Qualitative inspections show that the proposed method reduces artifacts significantly, which typically appear in point clouds because of inaccurate calibrations. Furthermore, quantitative results and comparisons with a high-resolution 3D scanner demonstrate that the calibrated point cloud represents the geometries present in the scene with much higher accuracy than with the un-calibrated point cloud.

Practical implications

The last key point of this work is the comparison of two laser scanners: the lemonbot (authors’) and a commercial FARO scanner. Despite being almost ten times cheaper, the laser scanner was able to achieve similar results in terms of geometric accuracy.

Originality/value

This work describes a novel calibration technique that is easy to implement and is able to achieve accurate results. One of its key features is the use of planes to calibrate the extrinsic transformation.

Details

Industrial Robot: the international journal of robotics research and application, vol. 47 no. 5
Type: Research Article
ISSN: 0143-991X

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Article
Publication date: 5 January 2022

Paulo Dias, Sílvia Lopes and Ricardo Peixoto

This study aims to examine the associations among mastering new technologies, teleworkers’ voluntariness and involuntariness and employee well-being (i.e. work engagement and…

748

Abstract

Purpose

This study aims to examine the associations among mastering new technologies, teleworkers’ voluntariness and involuntariness and employee well-being (i.e. work engagement and exhaustion). To the best of the authors’ knowledge, no studies have explored the relationships among these constructs in the same conceptual model.

Design/methodology/approach

Data were collected from a sample of 451 individuals performing telework in Portugal. AMOS was used to test all hypotheses of the study.

Findings

The findings showed a positive relationship between mastering new technologies and teleworkers’ voluntariness and a negative relationship between mastering new technologies and teleworkers’ involuntariness. However, contrary to expectations, voluntariness in teleworking was not significantly related to either work engagement or exhaustion. However, consistent with the theoretical background of self-determination theory, involuntariness in teleworking was negatively related to work engagement and positively related to exhaustion.

Originality/value

This study contributes to the literature by addressing the analysis of telework-related variables that may impact workers’ well-being. Implications for human resource management policies and knowledge management are discussed.

Details

Journal of Knowledge Management, vol. 26 no. 10
Type: Research Article
ISSN: 1367-3270

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Article
Publication date: 16 August 2021

Arthur do Nascimento Ferreira Barros, Milena Rayane Lopes dos Santos, Igor de Albuquerque Melo, Marcos Paulo Dias dos Santos and Suymarha Mendes da Silva

Due to the mixed evidence regarding politically connected (PCON) firms and voluntary disclosure, the authors seek to investigate the direction of the association between Brazilian…

396

Abstract

Purpose

Due to the mixed evidence regarding politically connected (PCON) firms and voluntary disclosure, the authors seek to investigate the direction of the association between Brazilian PCON firms and their level of information disclosed in the fight against corruption. This study is conducted in a developing country with a weak judicial system where board members or directors with political connections can operate without any oversights.

Design/methodology/approach

The authors empirically test our hypothesis that voluntary anti-corruption disclosure is negatively associated with political connections. Content analysis, Wilcoxon Rank and Pearson Correlation were employed in a sample of 30 companies that belong to sectors with the highest risk of corruption, between 2014 and 2016, the period of Brazilian elections. A sample of 90 observations is used with data collected from annual reports of companies listed on the São Paulo Stock Exchange in Brazil.

Findings

The study’s results indicate a positive and significant association between the level of voluntary anti-corruption disclosure and corporate political connection, confirming our second hypothesis. PCON firms could seek to improve their legitimacy after recent corporate corruption scandals discovered in Brazil where government members participated in the schemes of bribe and money laundering and embezzlement. Although our sample is composed of firms in industries of high corruption risk, which could increase bias, the results improve the literature with empirical contribution that has given little attention to the issue.

Originality/value

The latest corruption scandals in Brazil showed that companies were involved with government officials, corruption is one of the country's biggest issues for diverting public resources to basic needs such as education and health. The relationship between political connections and voluntary disclosure is an open empirical question, particularly dealing with anti-corruption. The study’s findings bring light on the subject, which deserves greater attention not only from researchers but from the society that is most affected by corruption.

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Article
Publication date: 31 August 2022

Silvia Lopes, Paulo C. Dias, Ana Sabino, Francisco Cesário and Ricardo Peixoto

The present study aims to examine the mediating role of (in)voluntariness in teleworking in explaining the relationship between employees’ fit to telework and work well-being…

1124

Abstract

Purpose

The present study aims to examine the mediating role of (in)voluntariness in teleworking in explaining the relationship between employees’ fit to telework and work well-being (i.e. work engagement and exhaustion).

Design/methodology/approach

A cross-sectional survey design was used in this study. The sample comprised 222 individuals performing telework in Portugal. Statistical analyses employed were descriptive statistics, Pearson’s correlation, confirmatory factor and structural equation analyses, and mediation analysis using Hayes Process macro.

Findings

The findings confirmed the hypothesis that employees’ fit to telework raises the voluntariness in telework and decreases involuntariness in telework. However, contrary to expectations, no significant relationships were found between voluntariness in telework, work engagement and exhaustion. Yet, involuntariness in telework showed a significant role in decreasing work engagement and increasing workers’ exhaustion. The mediating role of involuntariness in telework was confirmed in explaining the relationship between employees’ fit to telework and exhaustion.

Practical implications

Managers in global firms can draw from the results to understand how employees’ fit to telework directly and/or indirectly contributes to work well-being and develop human resource (HR) management practices aiming to increase employees’ fit to telework.

Originality/value

Although teleworking is already studied, to the best of the authors’ knowledge, no studies have analyzed the same conceptual model employees’ fit to telework, (in)voluntariness in teleworking and work well-being.

Details

Employee Relations: The International Journal, vol. 45 no. 1
Type: Research Article
ISSN: 0142-5455

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Article
Publication date: 16 June 2022

Ana Sabino, Elizabete Basilio, Silvia Lopes, Maria José Chambel, Paulo C. Dias and Francisco Cesário

This study aims to examine the relationship between perceived overqualification, perceived employability, perceived job insecurity and global psychological needs satisfaction…

418

Abstract

Purpose

This study aims to examine the relationship between perceived overqualification, perceived employability, perceived job insecurity and global psychological needs satisfaction, considering the moderating role of age groups.

Design/methodology/approach

A cross-sectional survey design with a sample of 350 individuals was used in this study.

Findings

A cross-sectional survey design with a sample of 350 individuals was used in this study.

Originality/value

By addressing the moderating role of age, this study is original and has practical implications for age diversity management.

Objetivo

Este estudo tem como objetivo estudar a relação entre a sobrequalificação, a empregabilidade, a insegurança no trabalho percebidas e satisfação das necessidades psicológicas globais, considerando o papel moderador dos grupos etários.

Design/metodologia/abordagem

Foi utilizado neste estudo um desenho de pesquisa transversal com uma amostra de 350 indivíduos.

Resultados

A sobrequalificação percebida, a empregabilidade percebida e a insegurança no trabalho percebida estão, em geral, significativamente relacionadas com a satisfação das necessidades psicológicas globais. No entanto, essas relações diferem entre as faixas etárias. Ou seja, para os indivíduos mais jovens, foi observada uma relação negativa entre a perceção de sobrequalificação e a satisfação das necessidades psicológicas globais, e para os indivíduos de meia-idade, a empregabilidade percebida está positivamente relacionada à satisfação das necessidades psicológicas globais, enquanto a insegurança no trabalho percebida e a sobrequalificação percebida estão negativamente relacionadas à satisfação das necessidades psicológicas globais. Finalmente, para os indivíduos mais velhos, a insegurança no trabalho percebida e a sobrequalificação percebida estão negativamente relacionadas à satisfação das necessidades psicológicas globais.

Originalidade

Ao abordar o papel moderador da idade, este estudo é original e tem implicações práticas para a gestão da diversidade em função do grupo etário.

Objetivo

Este estudio examina la relación entre la sobrecualificación percibida, la empleabilidad percibida, la inseguridad laboral percibida y la satisfacción de las necesidades psicológicas globales, considerando el papel moderador de los grupos de edad.

Diseño/metodología/enfoque

En este estudio se utilizó un diseño de encuesta transversal con una muestra de 350 individuos.

Resultados

La sobrecualificación percibida, la empleabilidad percibida y la inseguridad laboral percibida estaban, en general, significativamente relacionadas con la satisfacción de las necesidades psicológicas globales. Sin embargo, estas relaciones difieren entre los grupos de edad. En concreto, para los individuos más jóvenes, se observó una relación negativa entre la sobrecualificación percibida y la satisfacción de las necesidades psicológicas globales, y para los individuos de mediana edad, la empleabilidad percibida se relacionó positivamente con la satisfacción de las necesidades psicológicas globales, mientras que la inseguridad laboral percibida y la sobrecualificación percibida se relacionaron negativamente con la satisfacción de las necesidades psicológicas globales. Finalmente, para los individuos de mayor edad, la inseguridad laboral percibida y la sobrecualificación percibida se relacionaron negativamente con la satisfacción de las necesidades psicológicas globales.

Originalidad

Al abordar el papel moderador de la edad, este estudio es original y tiene implicaciones prácticas para la gestión de la diversidad de edad en el contexto de las políticas de RRHH de las organizaciones.

Available. Open Access. Open Access
Article
Publication date: 19 September 2022

Paulo C. Dias, Íris M. Oliveira, Anabela Rodrigues and Ricardo Peixoto

Firefighters are daily confronted with adverse, unpredictable and demanding situations. It is a dangerous profession that puts firefighters at risk of developing burnout. Although…

2761

Abstract

Purpose

Firefighters are daily confronted with adverse, unpredictable and demanding situations. It is a dangerous profession that puts firefighters at risk of developing burnout. Although the literature has already identified personal and work-related factors of burnout, the examination of specific factors explaining burnout among volunteer and career firefighters is still needed. The purpose of this study is to investigate the explaining role of personal and work-related factors on volunteer and career firefighters’ burnout.

Design/methodology/approach

A nonrandom convenience sample of 250 firefighters (67% volunteer; Mage = 31.88) completed a sociodemographic questionnaire, the Oldenburg Burnout Inventory, the Proactive Coping Scale and a standard of living subscale item. Hierarchical multiple linear regression models were tested. Fisher’s criterion was considered, with p-values lower than 0.05 interpreted as statistically significant.

Findings

Personal and work-related factors accounted for 18% of volunteer and 31% of career firefighters’ variations in burnout. Personal factors offered a greater contribution explaining volunteer and career firefighters’ burnout. Still, variations in the role played by age, family responsibilities, proactive coping and satisfaction with standard of living on burnout were found among volunteer and career firefighters. Taking the work-related factors into account, working in rotative shifts constituted a risk factor for career firefighters’ burnout.

Research limitations/implications

This study advances the understanding about the role of personal and work-related factors in volunteer and career firefighters’ burnout.

Originality/value

This study adds information about specific factors explaining burnout among voluntary and career firefighters. It deepens existing knowledge on variations in the role played by age, family responsibilities, work conditions, proactive coping and satisfaction with standard of living on the burnout of volunteer and career firefighters.

Details

International Journal of Organizational Analysis, vol. 31 no. 8
Type: Research Article
ISSN: 1934-8835

Keywords

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Book part
Publication date: 21 November 2024

Andrés Antillano

We propose to see, regarding the Venezuelan context and at the same time in dialogue with the literature on Latin American prisons, the prison through the prison-neighborhood…

Abstract

We propose to see, regarding the Venezuelan context and at the same time in dialogue with the literature on Latin American prisons, the prison through the prison-neighborhood correspondence. This includes, for example, looking at how the prison organizes crime outside, attributes social and reputational capital, extracts and redistributes illegal profits, export/import modes and logics of action and domination. The purpose is to (a) discuss the “hydraulic” theses on prison gangs, dominant in North American literature, which explain their emergence through conditions endogenous of the prison, and instead put the emphasis on the dynamics of exclusion and the “lumpen economies” in which the poor subsist, and (b) nuance the perspectives on the relations between prison and community from the point of view of the peripheral South, marked by high rates of exclusion, informality, and an economy strongly dependent on commodities and a significant labor surplus population, in contrast to the industrial economies of the Global North.

Details

Punishment in Latin America: Explorations from the Margins
Type: Book
ISBN: 978-1-83797-328-6

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Article
Publication date: 1 April 1995

JoséAmérico Dias Pinto, António Paulo Breda Coimbra and Carlos F.R. Lemos Antunes

In this paper it is proposed a thermal Finite element formulation that accommodates the current density dependency on the resistivity variation with temperature. As an application…

30

Abstract

In this paper it is proposed a thermal Finite element formulation that accommodates the current density dependency on the resistivity variation with temperature. As an application example, the steady‐state temperature distribution will be produced for a large 3‐phase induction motor as well as the hot spot temperature for different load conditions. The results produced by the proposed Finite element approach will be compared with the solution obtained considering the current density independent of the temperature as well as with experimental data.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 14 no. 4
Type: Research Article
ISSN: 0332-1649

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Article
Publication date: 22 August 2008

Matheus Alberto Cônsoli and Marcos Fava Neves

The aim is to describe the analysis conducted by a leading company in the dairy (yogurt and fermented milk) sector in Brazil regarding the decision to implement a door‐to‐door…

7142

Abstract

Purpose

The aim is to describe the analysis conducted by a leading company in the dairy (yogurt and fermented milk) sector in Brazil regarding the decision to implement a door‐to‐door distribution channel, in which one of the authors was involved.

Design/methodology/approach

A brief overview of the marketing channels is presented and the descriptive case study method was used to present the main company information.

Findings

The paper describes the decision‐making process that was used to define how basic services like breaking bulks, product variety, special convenience and wait time should be performed in this case. It also emphasizes the main channel decisions, the channel objectives and the chosen door‐to‐door structure for the company described in the case study.

Research limitations/implications

Even though case analysis has a theoretical background, the decision process used here cannot be generalized, being only a guide for academics and practitioners about how company A addressed the direct marketing issue.

Originality/value

The paper presents specific analysis of the Brazilian yogurt market and use as theoretical background the strategic environmental analysis. As a real case, it can be useful for practitioners as reference for decision making, as well for teaching purposes for case studies with college and MBA students. Finally, the paper presents as main contribution a “method for developing new marketing channels”.

Details

Direct Marketing: An International Journal, vol. 2 no. 3
Type: Research Article
ISSN: 1750-5933

Keywords

Available. Open Access. Open Access
Article
Publication date: 1 November 2019

Hitalo Alberto de Souza Faria Castilho, Matheus Souza De Resende, Eduardo Ramos de Oliveira Franco Montoro, Vinicius Akio De Almeida Shotoko, Michele Nascimento Jucá and Eli Hadad Junior

The purpose of this paper is to assess whether greater participation of venture capital/private equity (VC/PE) funds in the companies’ capital structure at the moment of initial…

1465

Abstract

Purpose

The purpose of this paper is to assess whether greater participation of venture capital/private equity (VC/PE) funds in the companies’ capital structure at the moment of initial public offering (IPO) contributes to the reduction in the underpricing of their shares.

Design/methodology/approach

Descriptive statistics, correlation analysis, mean difference test and cross-sectional regression were used. The final sample consisted of 89 companies making IPO in Brasil Bolsa Balcão between 2007 and 2017.

Findings

The participation of VC/PE funds was shown to mitigate the effect of information asymmetry on managers and shareholders, thus reducing the underpricing of companies at the moment of IPO (H1). However, the expectation that a greater participation of these funds promotes further reduction in a potential underpricing (H2) was not confirmed.

Research limitations/implications

One can highlight the small amount of IPOs during the sampling period due to the occurrence of international and national economic crises, as well as the difficulty in obtaining information on the participation of VC/PE funds in the companies’ capital structure.

Practical implications

It was observed that information asymmetry had a mitigating effect from the presence of these funds in the companies, which can improve the pricing of their shares, decrease the costs and make volume captions viable for investments, in addition to giving credibility to the market information effectiveness.

Originality/value

This study differs from others in that it assesses not only the influence of VC/PE funds on the reduction of the underpricing of IPO shares, but also the participation of these funds in the capital of these companies.

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