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Article
Publication date: 7 June 2021

Violeta Carvalho, Bruno Arcipreste, Delfim Soares, Luís Ribas, Nelson Rodrigues, Senhorinha Teixeira and José C. Teixeira

This study aims to determine the minimum force required to pull out a surface mount component in printed circuit boards (PCBs) during the wave soldering process through both…

126

Abstract

Purpose

This study aims to determine the minimum force required to pull out a surface mount component in printed circuit boards (PCBs) during the wave soldering process through both experimental and numerical procedures.

Design/methodology/approach

An efficient experimental technique was proposed to determine the minimum force required to pull out a surface mount component in PCBs during the wave soldering process.

Findings

The results showed that the pullout force is approximately 0.4 N. Comparing this value with the simulated force exerted by the solder wave on the component ( 0.001158 N), it can be concluded that the solder wave does not exert sufficient force to remove a component.

Originality/value

This study provides a deep understanding of the wave soldering process regarding the component pullout, a critical issue that usually occurs in the microelectronics industry during this soldering process. By applying both accurate experimental and numerical approaches, this study showed that more tests are needed to evaluate the main cause of this problem, as well as new insights were provided into the depositing process of glue dots on PCBs.

Details

Soldering & Surface Mount Technology, vol. 34 no. 1
Type: Research Article
ISSN: 0954-0911

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Article
Publication date: 13 August 2019

Rafael Almeida, José Miguel Teixeira, Miguel Mira da Silva and Paulo Faroleiro

The purpose of this paper is to ease the ISO 31000 standard understanding and provide mechanisms that allow organizations to adopt and adapt this standard to their reality.

2869

Abstract

Purpose

The purpose of this paper is to ease the ISO 31000 standard understanding and provide mechanisms that allow organizations to adopt and adapt this standard to their reality.

Design/methodology/approach

The research methodology adopted in this research was the design science research methodology.

Findings

Key finding is that enterprise architecture (EA) models and EA tools can help reduce the complexity of the ISO 31000 standard and improve the communication between stakeholders.

Practical implications

The research proposal serves the purpose of supporting the evidence collection for an enterprise risk management (ERM) initiative in an as-was, as-is, or to-be perspective.

Originality/value

Traditional ERM efforts operate on silos, limiting the sharing of risk information and the achievement of an organization-wide view of risks. EA can provide a common way to model complex business systems, from the strategic level to implementation details. This paper proposes the use of an EA model and an EA tool (Atlas) to represent ISO 31000, allowing a better understanding on the value of assets that can be affected from the manifestation of some risks over time.

Details

Journal of Enterprise Information Management, vol. 32 no. 5
Type: Research Article
ISSN: 1741-0398

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Article
Publication date: 18 December 2018

Flavia V. Barbosa, José C.F. Teixeira, Senhorinha F.C.F. Teixeira, Rui A.M.M. Lima, Delfim F. Soares and Diana M.D. Pinho

The aim of this paper is to characterize the rheological properties of the flux media exposed to different levels of solicitation and to determine its influence on the rheology of…

160

Abstract

Purpose

The aim of this paper is to characterize the rheological properties of the flux media exposed to different levels of solicitation and to determine its influence on the rheology of the solder paste. The data obtained experimentally are fundamental for the development of numerical models that allow the simulation of the printing process of printed circuit boards (PCB).

Design/methodology/approach

Rheological tests were performed using the Malvern rheometer Bohlin CVO. These experiments consist of the analysis of the viscosity, yield stress, thixotropy, elastic and viscous properties through oscillatory tests and the capacity to recover using a creep-recovery experiment. The results obtained from this rheological analysis are compared with the rheological properties of the solder paste F620.

Findings

The results have shown that the flux is viscoelastic in nature and shear thinning. The viscosity does not decrease with increasing solicitations, except in the case where the flow is withdrawn directly from the bottle. Even if the solder paste shows a thixotropic behavior, this is not the case of the flux, meaning that this property is given by the metal particles. Furthermore, the oscillatory tests proved that the flux presents a dominant solid-like behavior, higher than the solder paste, meaning that the cohesive/tacky behavior of the solder paste is given by the flux.

Research limitations/implications

To complement this work, printing tests are required.

Originality/value

This work demonstrates the importance of the rheological characterization of the flux in order to understand its influence in the solder paste performance during the stencil printing process.

Details

Soldering & Surface Mount Technology, vol. 31 no. 2
Type: Research Article
ISSN: 0954-0911

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Article
Publication date: 5 December 2024

Sílvia Monteiro, Sandra Santos, José Nuno Teixeira, Leonor Torres and José Palhares

Graduates’ employability has been recognised as a complex and multidimensional phenomenon in the theoretical literature. However, some critics have emerged around the lack of…

63

Abstract

Purpose

Graduates’ employability has been recognised as a complex and multidimensional phenomenon in the theoretical literature. However, some critics have emerged around the lack of relation between structural, contextual and individual dimensions that have been acknowledged as relevant for the understanding of graduates’ employability. This study aims to map empirical research, grounded on a scoping and integrative review of the research published to date on the determinants of graduates’ employability and offer a wider perspective of the knowledge produced across different disciplinary fields, and theoretical and methodological approaches.

Design/methodology/approach

Following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses protocol for Scoping Reviews, a systematic and extensive search of the literature was carried out and 74 studies focusing on the determinants of graduates’ employability were selected through inclusion and exclusion criteria. Then, data were extracted, analysed and interpreted with quantitative and qualitative techniques.

Findings

The results evidence that multiple factors mainly related to higher education attributes, educational arrangement, personal and interpersonal attributes, and socioeconomic conditions predict the odds of obtaining a job after graduation. This review also demonstrates some fragmentation of knowledge produced in this field and identifies a lack of an integrative approach, calling for more multidisciplinary research that might favour a more comprehensive knowledge of graduates’ employability.

Originality/value

By considering the different factors together, from individual and contextual levels, the present review offers an original and clearer overall picture of what is currently known and what is still unresearched about the determinants of graduates’ employability.

Details

Education + Training, vol. 67 no. 1
Type: Research Article
ISSN: 0040-0912

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Article
Publication date: 19 September 2019

José Eduardo Teixeira, Fernando Serra, Rosiele Pinto and Luana Salles

This paper aims to investigate the role of resource orchestration in turnaround attempts following the organizational decline in the context of an emerging economy.

422

Abstract

Purpose

This paper aims to investigate the role of resource orchestration in turnaround attempts following the organizational decline in the context of an emerging economy.

Design/methodology/approach

Multicase study of three Brazilian textile firms, following their trajectory from 1997 to 2009. We did a “historical reconstruction using the methodology” proposed by Mintzberg and McHugh (1985) to guide our data collection and analysis procedures. The methodology is geared towards the study of the evolution of organizations over a past period, wherein the researcher reconstructs the events after they have occurred, having developed them from documentary analysis and oral history.

Findings

The results indicate that resource orchestration is a critical capability for ensuring the coordinated implementation of operational and strategic actions in a turnaround. Moreover, in a context involving severe environmental jolts, the conservation of organizational slack appears to influence the effectiveness of resource orchestration and explains the different outcomes the firms in this study achieved in their turnaround attempts.

Research limitations/implications

This paper may be useful to practitioners involved in turnarounds, helping them evaluate the consequences of decisions involving the acquisition, reconfiguration, bundling and divestment of firm resources.

Practical implications

Besides contributing to the advancement of theory-informed research on decline and turnaround, this paper may be useful to practitioners involved in turnarounds, when they consider the consequences of decisions involving firm resources.

Originality/value

This paper helps advance theory-informed research on decline and turnaround in developing economies, helping address a gap in the extant literature, primarily focused on firms in developed countries.

Objetivo

Investigar, en el contexto de una economía emergente, el papel de la orquestación de recursos en los intentos de recuperación después del declive organizacional`.

Metodologia

Estudio multicaso de tres empresas textiles brasileñas siguiendo su trayectoria desde 1997 hasta 2009. Hicimos una “reconstrucción histórica utilizando la metodología” propuesta por Mintzberg y McHugh (1985) para guiar nuestra recopilación de datos y procedimientos de análisis. La metodología está orientada hacia el estudio de la evolución de organizaciones en un período pasado, en el que el investigador reconstruye los eventos después de que han ocurrido, habiéndolos desarrollado a partir del análisis documental y la historia oral.

Resultados

Nuestros resultados indican que la orquestación de recursos es una capacidad crítica para garantizar la implementación coordinada de acciones operativas y estratégicas en un processo de recuperación. Adicionalmente, en un contexto que implica impactos ambientales significativos, mantener la holgura organizacional parece influir sobre la eficacia de la orquestación de recursos y explica la diferencia de los resultados que las empresas encuestadas alcanzaron en sus tentativas de recuperación.

Implicaciones prácticas

Este artículo puede ser útil para los profesionales implicados en procesos de recuperación, ayudándoles a evaluar las consecuencias de las decisiones que implican la adquisición, reconfiguración, agrupación y desecho de recursos de la empresa.

Originalidad/valor

Este estudio contribuye al avance de la investigación de base teórica sobre declive y recuperación en economías en desarrollo, ayudando a eliminar una laguna en la literatura existente, la cual se a centrado principalmente en empresas en países desarrollados.

Objetivo

Investigar o papel da orquestração de recursos nas tentativas de turnaround após o declínio organizacional, no contexto de uma economia emergente.

Design/metodologia

Estudo multicaso de três empresas têxteis brasileiras, seguindo sua trajetória de 1997 até 2009. Fizemos uma “reconstrução histórica usando o metodologia” proposta por Mintzberg e McHugh (1985) para guiar nossa coleta de dados e procedimentos de análise. A metodologia é voltada para o estudo da evolução de organizaçöes ao longo de um período passado, em que o pesquisador reconstrói os eventos após ocorreram, tendo-os desenvolvido a partir da análise documental e da história oral.

Resultados

Nossos resultados indicam que a orquestração de recursos é uma capacidade crítica para garantir a implementação coordenada de ações operacionais e estratégicas num turnaround. Adicionalmente, num contexto envolvendo choques ambientais significativos, a preservação da folga organizacional parece influenciar a eficácia da orquestração de recursos e explicar a diferença dos resultados que as empresas pesquisadas alcançaram nas suas tentativas de turnaround.

Implicações práticas

Este artigo pode ser útil para profissionais envolvidos em turnarounds, ajudando-os a avaliar as consequências de decisões envolvendo a aquisição, reconfiguração, agrupamento e descarte de recursos da empresa.

Originalidade/valor

Este estudo contribui para o avanço da pesquisa de base teórica sobre declínio e turnaround em economias em desenvolvimento, ajudando a eliminar uma lacuna na literatura existente, focada principalmente em empresas em países desenvolvidos.

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Article
Publication date: 28 November 2022

José Teixeira, Sandro Alves, Pedro Mariz and Fernando Almeida

The current student selection process for short-term mobility actions under the Erasmus + program (i.e. intensive programs and blended intensive programs) is based exclusively on…

145

Abstract

Purpose

The current student selection process for short-term mobility actions under the Erasmus + program (i.e. intensive programs and blended intensive programs) is based exclusively on the students' order of enrolment and their grades. This study offers an alternative approach using the analytic hierarchy process based on a four-layer model that collects information about the specificities of each project and the profile of the students and also promotes greater inclusion and homogenization of the project teams.

Design/methodology/approach

A decision support system was built by decomposing it into three stages: the predesign stage, in which the problem is characterized, and the user requirements are identified; the design stage, in which the models, the database and the interfaces are formulated; and the field stage, in which six test scenarios were built to validate the proposed solution.

Findings

The results show that this model can be applied with various selection criteria among students and consider both their hard and soft skills. It can also be applied to help build teams in which the students' knowledge is aligned with the technical skills required by the projects.

Originality/value

The proposed approach is innovative in that it responds to the emerging challenge of short-term European mobility programs that aim to involve students with multidisciplinary competencies. The solution considers both hard and soft skills in the selection of students, which allows changing the student selection paradigm and obtaining potentially more homogeneous multicultural teams with greater learning potential.

Details

International Journal of Educational Management, vol. 37 no. 1
Type: Research Article
ISSN: 0951-354X

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Article
Publication date: 2 April 2020

Delfim Soares, Manuel Sarmento, Daniel Barros, Helder Peixoto, Hugo Figueiredo, Ricardo Alves, Isabel Delgado, José C. Teixeira and Fátima Cerqueira

This study aims to investigate the effect of bismuth addition (up to 30 Wt%) on the microstructure and electrical conductivity of a commercial lead-free alloy (SAC405) near the…

239

Abstract

Purpose

This study aims to investigate the effect of bismuth addition (up to 30 Wt%) on the microstructure and electrical conductivity of a commercial lead-free alloy (SAC405) near the solder/substrate soldered joint. The system under study is referred in this work as (SAC405 + xBi)/Cu, as Cu is the selected substrate in which the solder was casted. The electrical resistivity of this system was investigated, considering Bi addition effect on the local microstructure and chemical composition gradients within that zone.

Design/methodology/approach

Solder joints between Cu substrate and SAC405 alloy with different levels of Bi were produced. The electrical conductivity along the obtained solder/substrate interface was measured by four-point probe method. The microstructure and chemical compositions were evaluated by scanning electron microscopy/energy dispersive spectroscopy analysis.

Findings

Two different electrical resistivity zones were identified within the solder interface copper substrate/solder alloy. At the first zone (from intermetallic compound [IMC] until approximately 100 μm) the increase of the electrical resistivity is gradual from the substrate to the solder side. This is because of the copper substrate diffusion, which established a chemical composition gradient near the IMC layer. At the second zone, electrical resistivity becomes much higher and is mainly dependent on the Bi content of the solder alloy. In both identified zones, electrical resistivity is affected by its microstructure, which is dependent on Cu and Bi content and solidification characteristics.

Originality/value

A detailed characterization of the solder/substrate zone, in terms of electrical conductivity, was done with the definition of two variation zones. With this knowledge, a better definition of processing parameters and in-service soldered electronic devices behavior can be achieved.

Details

Soldering & Surface Mount Technology, vol. 33 no. 1
Type: Research Article
ISSN: 0954-0911

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Article
Publication date: 27 June 2022

Paulina Araújo Capela, Maria Sabrina Souza, Sharlane Costa, Jose C. Teixeira, Miguel Fernandes, Hugo Figueiredo, Isabel Delgado and Delfim Soares

In a printed circuit board assembly (PCBA), the coefficient of thermal expansion (CTE) mismatch between the solder joint materials has a detrimental impact on reliability. The…

166

Abstract

Purpose

In a printed circuit board assembly (PCBA), the coefficient of thermal expansion (CTE) mismatch between the solder joint materials has a detrimental impact on reliability. The mechanical stresses caused by the thermal changes of the assembly lead to fatigue and sometimes the failure of the solder joints. The purpose of this study is to propose a novel pad design to obtain an interrupted solder/substrate interface, to improve the PCBA reliability.

Design/methodology/approach

An interruption in the continuous intermetallic compound (IMC) layer of a solder joint was implemented, by the deposition of a silicone film in the pad, changing its geometry. That change allows a redistribution of stresses in the most ductile zone of the solder joint, the solder. The stress concentration at the solder/substrate interface is reduced, as well as the general state of stress at the solder joint.

Findings

A new way was developed to reduce the stress on the solder joints, caused by thermal variations, because of the different components CTEs mismatch. This new method consists of interrupting the IMC layers of the solder joint, strategically, redirecting the usual stresses to a more ductile area of the joint, the solder. This is an innovative method that allows increase the lifetime of PCBAs and the equipments.

Originality/value

In this study, a new pad design concept for higher solder joint reliability was developed to reduce the shear stress in the solder joints because of the CTE mismatch between all the solder joint components.

Details

Soldering & Surface Mount Technology, vol. 35 no. 2
Type: Research Article
ISSN: 0954-0911

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Article
Publication date: 6 February 2024

Sara Maia, José Pedro Teixeira Domingues, Maria Leonilde R. Rocha Varela and Luis Miguel Fonseca

The focus of this research is to investigate if user-generated content (UGC) generated in the Booking platform can support quality management improvement within the hospitality…

276

Abstract

Purpose

The focus of this research is to investigate if user-generated content (UGC) generated in the Booking platform can support quality management improvement within the hospitality industry by increasing customer satisfaction and eliminating defects more efficiently. Hence, it contributes to understanding how data-driven companies can rely on customer data to focus on innovation and performance improvement to meet customer requirements, eliminate defects and increase customer satisfaction.

Design/methodology/approach

Following the literature review, information was collected from the digital platform Booking, encompassing 15 hotel industry companies in Portugal Porto and Braga regions, selected due to their high number of customer reviews. This data was organized and categorized, eliminating all unnecessary information for the research and building an Excel database. The database was subsequently analysed with SPSS and Voyant software, performing statistical analysis, hypothesis testing and text-mining techniques to analyse the comments. After these analyses, applying quality tools allowed for more in-depth conclusions.

Findings

The research results highlight that customers' most relevant requirements in the Portuguese hospitality industry are breakfast, parking and a swimming pool. It was also possible to realize that the location is an attractive requirement, the bathroom is a must-be requirement and breakfast is a performance requirement. The results also allowed us to answer the most critical research question: “Is user-generated content a valuable aid to quality?” the answer is yes since it was possible to use the data to find improvements and faults/failures in the services.

Originality/value

The results of this study represent an essential step towards a complete understanding of how to take advantage of UGC within the hospitality industry by establishing a solid base of techniques, methods and quality tools for UGC analysis that can be applied in future research on different industry sectors.

Details

The TQM Journal, vol. 37 no. 3
Type: Research Article
ISSN: 1754-2731

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Article
Publication date: 3 November 2023

Slawomir Wawak, José Pedro Teixeira Domingues and Paulo Sampaio

This study aims to explore the conditions of successful implementation of Quality 4.0 in higher education institutions (HEIs) and the key factors affecting it, as well as the role…

497

Abstract

Purpose

This study aims to explore the conditions of successful implementation of Quality 4.0 in higher education institutions (HEIs) and the key factors affecting it, as well as the role of the Triple Helix collaborative (THC) framework in enhancing the integration of Quality 4.0 principles and Industry 4.0 technologies.

Design/methodology/approach

A survey-based strategy was adopted, adopting questionnaires distributed amongst researchers chosen based on their publications related to the aforementioned fields.

Findings

The successful integration of disruptive technologies, Quality 4.0 and THC in HEIs heavily relies on educators' continuous learning and professional development. Faculty members must acquire digital skills and competencies to effectively adopt disruptive technologies and implement Quality 4.0 principles in their teaching practices. HEIs should provide opportunities for faculty members to engage in ongoing training programmes, workshops and communities of practice that focus on enhancing their technological proficiencies, pedagogical strategies and collaborative skills.

Originality/value

To the best of the authors' knowledge, this is the first reported study linking the concepts of Quality 4.0 and the Triple Helix of Innovation in HEIs.

Details

The TQM Journal, vol. 36 no. 6
Type: Research Article
ISSN: 1754-2731

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