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1 – 5 of 5Giovanni Gómez-Gras, Marco A. Pérez, Jorge Fábregas-Moreno and Guillermo Reyes-Pozo
This paper aims to investigate the quality of printed surfaces and manufacturing tolerances by comparing the cylindrical cavities machined in parts obtained by fused deposition…
Abstract
Purpose
This paper aims to investigate the quality of printed surfaces and manufacturing tolerances by comparing the cylindrical cavities machined in parts obtained by fused deposition modeling (FDM) with the holes manufactured during the printing process itself. The comparison focuses on the results of roughness and tolerances, intending to obtain practical references when making assemblies.
Design/methodology/approach
The experimental approach focuses on the comparison of the results of roughness and tolerances of two manufacturing strategies: geometric volumes with a through-hole and the through-hole machined in volumes that were initially printed without the hole. Throughout the study, both alternates are explained to make appropriate recommendations.
Findings
The study shows the best combinations of technological parameters, both machining and three-dimensional printing, which have been decisive for obtaining successful results. These conclusive results allow enunciating recommendations for use in the industrial environment.
Originality/value
This paper fulfills an identified need to study the dimensional accuracy of the geometries obtained by additive manufacturing, as no experimental evidence has been found of studies that directly address the problem of the FDM-printed part with geometric and dimensional tolerances and desirable surface quality for assembly.
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Guillermo Guerrero-Vacas, Jaime Gómez-Castillo and Oscar Rodríguez-Alabanda
Polyurethane (PUR) foam parts are traditionally manufactured using metallic molds, an unsuitable approach for prototyping purposes. Thus, rapid tooling of disposable molds using…
Abstract
Purpose
Polyurethane (PUR) foam parts are traditionally manufactured using metallic molds, an unsuitable approach for prototyping purposes. Thus, rapid tooling of disposable molds using fused filament fabrication (FFF) with polylactic acid (PLA) and glycol-modified polyethylene terephthalate (PETG) is proposed as an economical, simpler and faster solution compared to traditional metallic molds or three-dimensional (3D) printing with other difficult-to-print thermoplastics, which are prone to shrinkage and delamination (acrylonitrile butadiene styrene, polypropilene-PP) or high-cost due to both material and printing equipment expenses (PEEK, polyamides or polycarbonate-PC). The purpose of this study has been to evaluate the ease of release of PUR foam on these materials in combination with release agents to facilitate the mulding/demoulding process.
Design/methodology/approach
PETG, PLA and hardenable polylactic acid (PLA 3D870) have been evaluated as mold materials in combination with aqueous and solvent-based release agents within a full design of experiments by three consecutive molding/demolding cycles.
Findings
PLA 3D870 has shown the best demoldability. A mold expressly designed to manufacture a foam cushion has been printed and the prototyping has been successfully achieved. The demolding of the part has been easier using a solvent-based release agent, meanwhile the quality has been better when using a water-based one.
Originality/value
The combination of PLA 3D870 and FFF, along with solvent-free water-based release agents, presents a compelling low-cost and eco-friendly alternative to traditional metallic molds and other 3D printing thermoplastics. This innovative approach serves as a viable option for rapid tooling in PUR foam molding.
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Herman Aguinis, Harry Joo, Guillermo Armando Ronda-Pupo and Young Hun Ji
The purpose of this study is to examine the narrowing of the gender publication gap (GPG) and predict when gender publication parity will be achieved. It investigates if women’s…
Abstract
Purpose
The purpose of this study is to examine the narrowing of the gender publication gap (GPG) and predict when gender publication parity will be achieved. It investigates if women’s publication rates are catching up with men’s when the proportion of published articles by women will match their representation in the field, and how the gender gap and parity are changing concerning lead authorships. The study analyzes data from 11,097 researchers across 8 management journals from 2002 to 2020, revealing a higher growth rate in women’s publications and varying degrees of parity achievement between micro and macro domains.
Design/methodology/approach
We created a database of all researchers who published at least one article in eight management journals from January 2002 through December 2020. It included 11,097 unique researchers who produced 7,357 unique articles, resulting in 21,361 authorships. We used data from the Web of Science to identify articles and their authors, filtering for “articles” and “reviews” only. We used allometric modeling and time series analysis to examine the GPG and forecast gender publication parity.
Findings
We found that the GPG is narrowing, with women’s publication rates growing faster than men’s. Parity in lead authorships has already been achieved or is within reach for many journals, especially in micro domains. However, macro-oriented journals show slower progress, with some not expected to reach parity until 2045 or later. These improvements are linked to increased representation of women in leadership positions and targeted mentoring programs in micro domains.
Research limitations/implications
While our study focused on publications, it did not account for citations, which could provide a more comprehensive view of research impact. Future research should explore other journals and different time windows and include citation analysis to understand the GPG and parity further.
Practical implications
The narrowing GPG is a positive development for organization studies, particularly in micro domains. This progress can mitigate stereotypes about women’s abilities, promote equity in hiring and promotion by considering authorship order and highlight the importance of targeted mentoring programs to reduce barriers for women. Additionally, business schools should identify and address performance situational constraints that disproportionately affect women, using techniques like the critical incidents approach to design effective interventions.
Social implications
The study’s societal implications include fostering greater gender equity in academic publishing, which can influence broader social norms and reduce gender stereotypes in academia. Achieving gender parity in publications can lead to more equitable hiring, promotion and recognition practices. Additionally, it highlights the importance of removing performance situational constraints and biases that hinder women’s academic progress, thus promoting a more inclusive and fair academic environment. These changes can inspire other fields to implement similar measures, contributing to societal progress toward gender equality.
Originality/value
The study’s originality/value lies in its longitudinal approach to analyzing the GPG in organization studies, contrasting with prior cross-sectional studies. It provides new insights by predicting when gender parity will be achieved in various journals, showing faster progress in micro domains compared to macro domains. Additionally, the study introduces methodological innovations such as allometric modeling and scenario-based analyses, highlighting the importance of reducing situational constraints for women in academia. These findings offer a nuanced understanding of the ongoing efforts and challenges in achieving gender equity in academic publishing.
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Luis Fernando Pérez and Miguel I. Gómez
The purpose of this research is to study the Colombian avocado export industry, identify key insights associated with creating and sustaining the avocado value chain, and to…
Abstract
Purpose
The purpose of this research is to study the Colombian avocado export industry, identify key insights associated with creating and sustaining the avocado value chain, and to understand the impact of the public policies affecting this industry.
Design/methodology/approach
The approach consists of two case studies to shed light on the opportunities and challenges of developing a sustainable avocado value chain in Colombia. One case deals with a vertically integrated business (Arcángel Miguel) while the other focuses on an association of small growers (Asohass). The analysis was informed by a series of interviews with key actors along the avocado supply chain to uncover the business strategies to move avocados to destination markets. The authors compare and contrast approaches to business development, international expansion, and role of public policies.
Findings
The authors found that the strategies followed by these organizations differ in means but aim for the same objective: maximize profits, improve environmental performance, and enhance the social wellbeing of growers. The authors found that each type of business model requires distinct public policies to succeed and different strategies to appropriately allocate efforts. The findings are relevant to other high-value crops and other Latin American countries with similar geographical and social characteristics.
Research limitations/implications
These insights underscore the need of public policies tailored to the specific needs of the different actors in the value chain. The current emphasis on certifications and export markets works well for large agribusinesses, but smallholder growers need policies tailored to new investments in physical, human, and social capital.
Originality/value
This study contributes to the literature on avocado value chains in Latin America, emphasizing the challenges faced by the emergent Colombia avocado sector, a country that only began exporting this commodity in 2010.
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The Covid-19 pandemic has rekindled interest in sovereign debt crises amidst calls for debt relief for developing and emerging countries. But has debt relief lessened the debt…
Abstract
Purpose
The Covid-19 pandemic has rekindled interest in sovereign debt crises amidst calls for debt relief for developing and emerging countries. But has debt relief lessened the debt burdens of emerging and developing economies? The purpose of this paper is to empirically address this question. In particular, the focus is on the implications of debt relief and institutional qualities for sovereign debt in emerging and developing economies.
Design/methodology/approach
The model extends the framework on the probability of default by incorporating the receipt of debt relief by a debtor country. Doing so allows to better explain movements of sovereign defaults relating to debt relief. The model is estimated via the regular probit regression.
Findings
The analysis shows that the debt relief provided, thus, far, failed to ease the debt overhang problems of developing and emerging countries and reduced investment. The current debt relief schemes may underscore the prospects of self-enforcing and self-fulfilling sovereign debt crises rather than eliminating the dilemma completely. Regarding the forms of debt relief, the analysis shows that debt forgiveness offers favourable prospects in terms of debt sustainability and economic outcomes than debt rescheduling. Perhaps, the sovereign debt crises, particularly in low-income countries, hinge on insolvency problems rather than transitory illiquidity issues.
Practical implications
Any debt relief mechanism should consider seriously the potential incentive effect that reinforces expectations of future debt-relief initiatives. Importantly, solving the sovereign debt problem requires a programme for sustained investment and economic growth, while not discounting the critical role of prudent debt management policies and institutions.
Originality/value
This study contributes a different angle to the debate on sovereign debt distress. Aside from the structural and economic factors, this study investigates the role of debt management policy in the debtor nation and the implications of debt relief benefits for sovereign risk. The framework also focuses on whether the different forms of debt relief exert distinctive impacts.
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