Search results

1 – 10 of 82
Per page
102050
Citations:
Loading...
Access Restricted. View access options
Article
Publication date: 15 June 2020

Dandun Mahesa Prabowoputra, Aditya Rio Prabowo, Syamsul Hadi and Jung Min Sohn

In Southeast Asia, the renewable energy produced from hydropower systems has significant potential. Therefore, adequate development is needed to prevent future energy-related…

293

Abstract

Purpose

In Southeast Asia, the renewable energy produced from hydropower systems has significant potential. Therefore, adequate development is needed to prevent future energy-related crises. This study, therefore, aims to determine the variations effects in geometry and the geometrical factors on turbine performance.

Design/methodology/approach

The developed aspects are selected to determine the blade shape, its number and multistage requirements. The study was conducted in 3D simulation, with Ansys software used to calculate a series of computational fluid dynamic problems. The aspect ratio applied in this study utilized the ratio of the overall diameter of the rotor height (D / H), which is 1.

Findings

The results showed that the highest Cp-max value, number of blades and stages were 0.2, two and three, respectively. Furthermore, these attributes combined to improve the performance of hydroturbines.

Research limitations/implications

The research was fully conducted using numerical simulation, which requires sustainable research in the form of laboratory experiments. Also, pioneer experiments were conducted using benchmarking to ensure the results obtained are reliable.

Practical implications

Hydropower is one of the best renewable energy sources in Indonesia with a large potential in the archipelago and tropical countries due to rivers and various water sources. The current generated is a useful reference for Savonius design.

Originality/value

The originality of this study is to examine the three aspects of the geometry of the rotor, such as the number and shape of blades, as well as the stages in the same boundary conditions. Therefore, the comparison of the effects of changes in geometry on turbine performance is more acceptable and complete compared to the pioneer works, which focused on a parameter. This research combines several aspects to determine the effect of rivers and various water sources on the hydroturbine.

Details

Multidiscipline Modeling in Materials and Structures, vol. 17 no. 1
Type: Research Article
ISSN: 1573-6105

Keywords

Access Restricted. View access options
Article
Publication date: 3 December 2024

Reza Kurniawan Saputra, Brilliant Aditya Fhandy, Aditya Rio Prabowo, Quang Thang Do, Budi Santoso and Nurul Muhayat

The high rate of ship casualties demands serious attention. Earlier studies have yet to integrate several scenarios in an experiment. This research aims to determine damage to a…

12

Abstract

Purpose

The high rate of ship casualties demands serious attention. Earlier studies have yet to integrate several scenarios in an experiment. This research aims to determine damage to a ship's hull that is assumed to have been stranded due to being hit by a rock under the sea.

Design/methodology/approach

This scenario was analyzed by conducting a penetration test simulation using the ANSYS LS DYNA. Modeling was carried out with core, speed, indenter shape and indenter angle variations. The test is carried out by moving the indenter against the plate until the plate is damaged.

Findings

The results of this research show that the round indenter gave the best results in testing, while changes in speed below 1.5 m/s did not significantly affect the results. The contact angle of the indenter to the panel is directly proportional to the damage to the panel, and core X has the best results in the test.

Originality/value

This work presented several proposed eccentric sandwich panels to calculate their performance against impact loading. The detailed geometry for future reference is presented, while the indenter-panel interactions are validated based on experimental work.

Details

International Journal of Structural Integrity, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1757-9864

Keywords

Access Restricted. View access options
Book part
Publication date: 25 May 2021

Alessandra Girlando, Simon Grima, Engin Boztepe, Sharon Seychell, Ramona Rupeika-Apoga and Inna Romanova

Purpose: Risk is a multifaceted concept, and its identification requires complex approaches that are often misunderstood. The consequence is that decisions are based on limited…

Abstract

Purpose: Risk is a multifaceted concept, and its identification requires complex approaches that are often misunderstood. The consequence is that decisions are based on limited perception rather than the full value and meaning of what risk is, as a result, the way it is being tackled is incorrect. The individuals are often limited in their perceptions and ideas and do not embrace the full multifaceted nature of risk. Regulators and individuals want to follow norms and checklists or overuse models, simulations, and templates, thereby reducing responsibility for decision-making. At the same time, the wider use of technology and rules reduces the critical thinking of individuals. We advance the automation process by building robots that follow protocols and forget about the part of risk assessment that cannot be programed. Therefore, with this study, the objective of this study was to discover how people define risk, the influencing factors of risk perception and how they behave toward this perception. The authors also determine how the perception differed with age, gender, marital status, education level and region. The novelty of the research is related to individual risk perception during COVID-19, as this is a new and unknown phenomenon. Methodology: The research is based on the analysis of the self-administered purposely designed questionnaires we distributed across different social media platforms between February and June 2020 in Europe and in some cases was carried out as a interview over communication platforms such as “Skype,” “Zoom” and “Microsoft Teams.” The questionnaire was divided into four parts: Section 1 was designed to collect demographic information from the participants; Section 2 included risk definition statements obtained from literature and a preliminary discussion with peers; Section 3 included risk behavior statements; and Section 4 included statements on risk perception experiences. A five-point Likert Scale was provided, and participants were required to answer along a scale of “1” for “Strongly Agree” to “5” for “Strongly Disagree.” Participants also had the option to elaborate further and provide additional comments in an open-ended box provided at the end of the section. 466 valid responses were received. Thematic analysis was carried out to analyze the interviews and the open-ended questions, while the questionnaire responses were analyzed using various quantitative methods on IBM SPSS (version 23). Findings: The results of the analysis indicate that individuals evaluate the risk before making a decision and view risk as both a loss and opportunity. The study identifies nine factors influencing risk perception. Nevertheless, it must be emphasized that we can continue to develop models and rules, but as long as the risk is not understood, we will never achieve anything.

Details

Contemporary Issues in Social Science
Type: Book
ISBN: 978-1-80043-931-3

Keywords

Access Restricted. View access options
Case study
Publication date: 2 April 2020

Rameshan Pallikara

To evaluate a difficult career choice under compelling organizational circumstances. To analyse a complex organizational culture to understand the nuances of career decisions. To…

Abstract

Learning outcomes

To evaluate a difficult career choice under compelling organizational circumstances. To analyse a complex organizational culture to understand the nuances of career decisions. To relate career dilemmas to relevant conceptual and theoretical strands of organizational behaviour. To interpret the leadership style and its interaction with organizational culture. To determine possible strategic recourses to deal with the dynamics of destructive leadership and toxic cultures.

Case overview/synopsis

The case is about the experiences of Raamit Pell, a Middle-level Executive at Accadia Management Services, and his encounters with a new boss, Pret Sohn. Raamit Pell had joined Accadia at a time when the organization was undergoing some political and cultural turmoil. When Pret Sohn came in as the new Chief Executive Officer six months later, there were a lot of expectations. But, Pret Sohn too began following Accadia’s existing political culture, indulging in unhealthy organizational practices. He caused mental harassment to many executives. One such executive was Raamit Pell. Despite Raamit’s excellent performance, Pret Sohn denied him a well-deserved promotion. Sohn justified it by saying that performance alone did not matter. Raamit felt deeply disturbed and considered quitting Accadia. He was reluctant to leave as a defeated man. Subsequently, he received an offer from another subsidiary of Accadia’s holding agency. As he was undergoing a three-month mandatory notice period for his release, Raamit became concerned about his decision to leave Accadia. Deep in his mind he longed to redeem his hurt pride at Accadia. So, he was pondering whether he had taken the decision to resign in haste.

Complexity academic level

Level: Post-graduate/doctoral and executive education programmes in management and allied subjects. Courses: Courses in Career Decisions, Organizational Behaviour, Leadership, Organizational Culture and Organizational Ethics.

Supplementary materials

Teaching Notes are available for educators only.

Subject code

CSS 7: Management Science.

Details

Emerald Emerging Markets Case Studies, vol. 10 no. 1
Type: Case Study
ISSN: 2045-0621

Keywords

Access Restricted. View access options
Article
Publication date: 1 February 2000

Yaw A. Debrah and Ian G. Smith

Presents over sixty abstracts summarising the 1999 Employment Research Unit annual conference held at the University of Cardiff. Explores the multiple impacts of globalization on…

11599

Abstract

Presents over sixty abstracts summarising the 1999 Employment Research Unit annual conference held at the University of Cardiff. Explores the multiple impacts of globalization on work and employment in contemporary organizations. Covers the human resource management implications of organizational responses to globalization. Examines the theoretical, methodological, empirical and comparative issues pertaining to competitiveness and the management of human resources, the impact of organisational strategies and international production on the workplace, the organization of labour markets, human resource development, cultural change in organisations, trade union responses, and trans‐national corporations. Cites many case studies showing how globalization has brought a lot of opportunities together with much change both to the employee and the employer. Considers the threats to existing cultures, structures and systems.

Details

Management Research News, vol. 23 no. 2/3/4
Type: Research Article
ISSN: 0140-9174

Keywords

Access Restricted. View access options
Article
Publication date: 25 October 2018

Hadi Miyanaji, Niknam Momenzadeh and Li Yang

This study aims to experimentally investigate the effect of the powder material characteristics on the qualities of the binder jetting additive manufacturing parts both before and…

1365

Abstract

Purpose

This study aims to experimentally investigate the effect of the powder material characteristics on the qualities of the binder jetting additive manufacturing parts both before and after post processing (sintering).

Design methodology/approach

Three different types of the 316L stainless steel powder feedstock with various mean particle sizes and size distributions were studied. The influence of the powder particle size distributions and pore sizes on the powder bed packing densities and on the dynamics of the binder droplet-powder bed interactions were characterized. In addition, the surface roughness and densities of these parts both in the green state and after sintering were studied.

Findings

The results revealed the significant role of the powder feedstock characteristics on the liquid binder/powder bed interaction and consequently on the dimensional accuracies of the green parts. It was observed that the parts printed with the smaller mean particle sizes resulted in better surface finish and higher final densities after sintering. Furthermore, the hardness of the sintered parts produced with smaller powder particles exhibited higher values compared to the parts fabricated with the larger particles. On the other hand, larger particle sizes are advantageous for various green part qualities including the dimensional accuracies, green part densities and surface roughness.

Originality/value

This study establishes more comprehensive correlations between the powder feedstock characteristics and various quality criteria of the printed binder jetting components in both green and sintered states. These correlation are of critical importance in choosing the optimal process parameters for a given material system.

Details

Rapid Prototyping Journal, vol. 25 no. 2
Type: Research Article
ISSN: 1355-2546

Keywords

Access Restricted. View access options
Article
Publication date: 19 May 2022

Eunkyung Kim

This paper aims to explore how heads in South Korean workplace perceive the retirement preparation of older Korean workers and their roles in accordance with life design…

114

Abstract

Purpose

This paper aims to explore how heads in South Korean workplace perceive the retirement preparation of older Korean workers and their roles in accordance with life design perspective.

Design/methodology/approach

Qualitative in-person interviews were conducted with top leaders of 15 corporations in small- and medium-sized enterprises (SMEs) and analyzed by using a conventional content analysis.

Findings

Top leaders in corporations consider that older Korean workers whose retirement preparation is their own responsibility have not been actively preparing for their postretirement life. Nevertheless, some of these heads are attempting to assist with career development or career transition. Some believe that older workers should work as long as they are capable and should be retained after the official retirement age.

Research limitations/implications

These exploratory findings are preliminary, and the top-down mechanism might work differently in a specific sector. Future research merits a large-scale investigation of each specific business.

Practical implications

It is implied that policy initiatives should support SMEs with subsidy programs for older workers’ employment, empowering longer working as healthy pathways to postretirement.

Originality/value

This pilot study indicates some degree of possible roles of top corporate leaders for workers’ retirement preparation in terms of career development and career transition and retainment of older workers.

Available. Open Access. Open Access
Article
Publication date: 14 August 2023

Stephen Kehinde Medase and Ivan Savin

Although employees' creativity is vital for firm innovation and overall performance, little is done to examine the potential association between creativity and employment. This…

2295

Abstract

Purpose

Although employees' creativity is vital for firm innovation and overall performance, little is done to examine the potential association between creativity and employment. This paper investigates the contribution of employees' creativity, process and product innovations to firm-level employment growth.

Design/methodology/approach

The authors use data from World Bank Enterprise Survey and Innovation Follow-up Survey on 9503 firms covering the period 2012–2015 in 11 countries from sub-Saharan Africa and Heckman's two-stage estimation model.

Findings

This study's results indicate a positive role of creativity on firm-level employment growth. In addition, the authors find evidence for a complementary effect arising from the combination of creativity with managerial experience, staff level of education and their associated skills, in contrast, combining creativity with internal or external R&D results in a substitution effect. Interestingly, these synergy effects are pronounced for SMEs but absent for large firms.

Practical implications

Policy makers in developing economies of sub-Saharan Africa should stimulate company management to use free time offered to employees to be creative in the workplace as one of their key strategies to stimulate employment growth. This strategy is expected to be particularly fruitful among SMEs having some managerial experience and skilled stuff.

Originality/value

In contribution to innovative work practices and workforce creativity, the authors demonstrate that providing employees with free time could be an alternative way to enhance the focal firms' performance.

Details

African Journal of Economic and Management Studies, vol. 15 no. 2
Type: Research Article
ISSN: 2040-0705

Keywords

Access Restricted. View access options
Article
Publication date: 1 February 2023

Hoa Pham, Huu Phuc Dang and Bang Nguyen-Viet

The call for consumption reduction behavior has been getting more attention from scholars and practitioners. However, the consumption reduction often receives backfire from…

863

Abstract

Purpose

The call for consumption reduction behavior has been getting more attention from scholars and practitioners. However, the consumption reduction often receives backfire from consumers because it does not follow the business philosophy of demand creation. Thus, this research dissolves this issue by using a holistic corporate social responsibility (CSR) approach regarding sustainable development.

Design/methodology/approach

A conceptual model was developed to represent the proposed relationships among the related variables. The current study employed an online survey to collect data from 341 international program students of three prominent universities in Ho Chi Minh City, Vietnam.

Findings

The findings indicate that the perception of the holistic CSR negatively impacts perceived corporate hypocrisy, triggering in turn brand credibility, resulting in brand advocacy and mindful consumption behavior.

Originality/value

This research forms a holistic CSR including economic, environmental and societal dimensions and proposes that the holistic CSR triggers brand advocacy and mindful consumption behavior representing consumption reduction behavior via the mediating roles of perceived corporate hypocrisy and brand credibility. These findings contribute to theoretical and managerial implications in CSR practices with the aim of consumption reduction.

Details

Journal of Fashion Marketing and Management: An International Journal, vol. 27 no. 5
Type: Research Article
ISSN: 1361-2026

Keywords

Access Restricted. View access options
Article
Publication date: 17 May 2022

Bee-Lia Chua, Amr Al-Ansi, Seongseop (Sam) Kim, Antony King Fung Wong and Heesup Han

This study aims to investigate the theoretical relationships between job stressors, psychological stress and coping strategies in the context of the global travel and tourism…

1689

Abstract

Purpose

This study aims to investigate the theoretical relationships between job stressors, psychological stress and coping strategies in the context of the global travel and tourism crisis faced by the airline industry.

Design/methodology/approach

An online cross-sectional survey was designed to obtain empirical data from airline employees in South Korea and Hong Kong. A total of 366 airline employees participated in the survey through convenience sampling method.

Findings

The structural equation modeling findings indicated that work schedule and demand; job insecurity and financial concerns; and role conflict played a significant role in creating psychological stress, which, in turn, determined emotion-oriented coping. The influence of the identified job stressors on psychological stress was significantly different between South Korean and Hong Kong airline employees.

Practical implications

The study demonstrates ways in which airline employees react to stressful work circumstances to avoid loss of resources. Furthermore, it highlights the role that psychological stress plays in influencing airline employees to direct attention to emotion-oriented coping mechanisms.

Originality/value

In view of the immense impact of the COVID-19 pandemic on the global airline industry, this study expands the role of job stressors in a peculiar and unprecedented work environment in the airline industry and accentuates the varying effects job stress may have on coping strategies from the perspective of airline employees in an Asian culture.

Details

International Journal of Contemporary Hospitality Management, vol. 34 no. 10
Type: Research Article
ISSN: 0959-6119

Keywords

1 – 10 of 82
Per page
102050