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Article
Publication date: 1 July 2021

Sang-Do Choi, Tae-Soo Eum, Eun Taek Shin and Chang Geun Song

Complicated motion of vortex is frequently observed in the wake of islands. These kinds of swirling fluid cause the trap of sediments or pollutants, subsequently inducing the dead…

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Abstract

Purpose

Complicated motion of vortex is frequently observed in the wake of islands. These kinds of swirling fluid cause the trap of sediments or pollutants, subsequently inducing the dead zone, odor or poor water quality. Therefore, the understanding of flow past a circular cylinder is significant in predicting water quality and positioning the immersed structures. This study aims to investigate the flow properties around a structure using Navier-slip boundary conditions.

Design/methodology/approach

Boundary conditions are a major factor affecting the flow pattern because the magnitude of flow detachment on a surface can redistribute the tangential stress on the wall. Therefore, the authors performed an analysis of laminar flow passing through a circular structure to investigate the effect of boundary conditions on the flow pattern.

Findings

The authors examined the relationship between the partial-slip boundary conditions and the flow behavior at low Reynolds number past a circular cylinder considering velocity and vorticity distributions behind the cylinder, lift coefficient and Strouhal number. The amplitude of lift coefficient by the partial slip condition had relatively small value compared with that of no-slip condition, as the wall shear stress acting on the cylinder became smaller by the velocity along the cylinder surface. The frequency of the asymmetrical vortex formation with partial slip velocity was increased compared with no-slip case due to the intrinsic inertial effect of Navier-slip condition.

Originality/value

The ability to engineer slip could have dramatic influences on flow, as the viscous dominated motion can lead to large pressure drops and large axial dispersion. By the slip length control, no-slip, partial-slip and free-slip boundary conditions are tunable, and the velocity distributions at the wall, vortex formation and wake pattern including the amplitude of lift coefficient and frequency were significantly affected by slip length parameter.

Details

World Journal of Engineering, vol. 19 no. 5
Type: Research Article
ISSN: 1708-5284

Keywords

Available. Open Access. Open Access
Article
Publication date: 30 June 2011

Hyung-Geun Kim

China is currently developing and promoting an industrial cluster policy at the government level. By enacting the ‘Opinion on promoting industrial cluster development’, China is…

303

Abstract

China is currently developing and promoting an industrial cluster policy at the government level. By enacting the ‘Opinion on promoting industrial cluster development’, China is supporting the development of industrial clusters. Building an industrial cluster is done by using a single factor but requires many additional factors like regional characteristics, competitiveness factors are also diversified. To evaluate the competitiveness of the Chinese automobile industry cluster, a competitiveness element index should be developed and a competitiveness evaluation method is needed to evaluate the importance of each element. To accomplish this objective, this research applied the analytic hierarchy process (AHP) and focused on the importance of the competitiveness elements.

This research investigated the character is tics regarding cases of clusters and also analyzed the competitiveness of the Changchun automobile cluster located in northeastern China. The purpose of this research is to help Korean enterprises who enter China in the hopes that Korea will emerge as a top automobile production country.

Details

Journal of International Logistics and Trade, vol. 9 no. 1
Type: Research Article
ISSN: 1738-2122

Keywords

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Book part
Publication date: 19 October 2016

Chang Kyung-Sup

With their national economy rapidly and structurally turning away from the long-cherished stable employment regime since the national financial crisis, South Koreans’ poverty is…

Abstract

With their national economy rapidly and structurally turning away from the long-cherished stable employment regime since the national financial crisis, South Koreans’ poverty is increasingly manifested through financial entrapment ensuing from heavy personal indebtedness to banks, kin members and friends, and, the worst of all, private usurers. The world’s once most aggressively saving population turned into one of the world’s most indebted populations merely in a decade. Having lost its once-proud capacity of a developmental state, the South Korean government has instead been busy devising various public schemes for offering grassroots consumer loans in supposedly preferential terms. Consumer credit, instead of social wage, has been offered rather generously by this increasingly neoliberalized state. This is another crucial component of financialization in the contemporary world political economy. South Korea’s emergency measures for escaping the national financial crisis have paradoxically ended up transplanting the financial trouble from banks and industrial enterprises to grassroots households.

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Book part
Publication date: 10 November 2016

Eunha Koh

Although Korean sociology of sport is relatively unknown to the international community of scholars, it is a mature field in Korea. Sociology of sport was first introduced in…

Abstract

Although Korean sociology of sport is relatively unknown to the international community of scholars, it is a mature field in Korea. Sociology of sport was first introduced in Korea in the mid-1960s when the field first evolved in North America and Europe. However, the development of the field shows different aspects from its Western counterpart due to unique cultural and environmental factors both in academia and in society. There are three major research trends that form Korean sociology of sport. First, there is the research focus on the benefit of sport and physical activity by examining empirical data using quantitative methodologies. The second group of researchers pays attention to individual experience in diverse sport fields and utilize qualitative methodologies to investigate empirical or secondary data. The third and most recent trend is a critical approach that theoretically analyzes ideologies, power relations, and identity politics in sport and society. When looking at the future, there are problems and limitations within the field in Korea. These include lack of continuity in terms of conference sub-themes, over-production of doctoral degree graduates, conservatism rooted in the field, and a danger of regarding sport policy research as an exit for sport sociologists. However, there are also possibilities and reasons for optimism. The biggest possibility for Korean sociology of sport is globalization of the field. Another significant possibility is the need for sport sociologists in planning, developing, and evaluating sport policy. Finally, diversification of the field gives ample opportunities for future research.

Details

Sociology of Sport: A Global Subdiscipline in Review
Type: Book
ISBN: 978-1-78635-050-3

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Book part
Publication date: 9 May 2022

Tobin Im

Abstract

Details

Transformation of Korean Politics and Administration: A 30 Year Retrospective
Type: Book
ISBN: 978-1-80382-116-0

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Article
Publication date: 13 February 2017

Namho Chung, Hyo Geun Song and Hyunae Lee

First, this paper aims to investigate the impact of impulsiveness on two types of shopping value (e.g. utilitarian and hedonic value) and the urge to buy restaurant products and…

8487

Abstract

Purpose

First, this paper aims to investigate the impact of impulsiveness on two types of shopping value (e.g. utilitarian and hedonic value) and the urge to buy restaurant products and services impulsively in social commerce environments. Second, the study assesses the impact of situational factors (e.g. scarcity and serendipity) on individuals’ shopping values.

Design/methodology/approach

Data were collected from 332 participants. By using PLS-graph 3.0, structural equation modeling was conducted. Furthermore, a hierarchical regression model was conducted for testing the mediating and moderating effects.

Findings

The results indicate that impulsiveness is a strong predictor for two types of shopping value (hedonic and utilitarian) and the urge to buy impulsively. While the hedonic shopping value was found to have a significant influence on the urge to buy impulsively, utilitarian value was not. Scarcity was moderator in the relationships between impulsiveness and both types of shopping value, whereas serendipity was found to moderate only the relationship between impulsiveness and the utilitarian shopping value.

Practical implications

The findings show that the marketing managers and application developers of social commerce should place their focus on scarcity and serendipity to stimulate consumers in having a hedonic shopping value so to have an urge to buy impulsively.

Originality/value

First, although most previous studies focused on only rational or planned consumption, this study focused on irrational and unplanned consumption as well. Second, the authors assessed the role of situational factors (scarcity and serendipity) occurring in social commerce and asserted that these factors moderate the relationship between consumers’ shopping values and their urge to buy impulsively.

Details

International Journal of Contemporary Hospitality Management, vol. 29 no. 2
Type: Research Article
ISSN: 0959-6119

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Article
Publication date: 18 October 2011

Jungguk Kim, Agus Budiyono, Dong‐Min Kim, Ho‐Geun Song and Doo‐Hyun Kim

The purpose of this paper is to introduce a new danger‐aware Operational Flight Program (OFP) for the unmanned helicopter's auto‐navigation based on the well‐known time‐triggered…

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Abstract

Purpose

The purpose of this paper is to introduce a new danger‐aware Operational Flight Program (OFP) for the unmanned helicopter's auto‐navigation based on the well‐known time‐triggered message‐triggered object (TMO) model.

Design/methodology/approach

In this design with the TMO, the danger‐awareness means two things. First, an unmanned helicopter maneuvers on safe altitudes to avoid buildings or mountains when navigating to the target position. It is assumed that minimum safe altitudes are given on evenly spaced grids and on the center points of every four adjacent grids. A three‐dimensional (3D) path‐finding algorithm using this safe‐altitude information is proposed. Second, a helicopter automatically avoids a zone with very high temperature caused by a fire.

Findings

Since the auto‐flight control system requires componentized real‐time processing of sensors and controllers, the TMO model that has periodic and sporadic threads as members, has been used in designing the OFP. It has been found that using the TMO scheme is a way to construct a very flexible, well‐componentized and timeliness‐guaranteed OFP.

Practical implications

As the RTOS, RT‐eCos has been used. It was developed a few years ago based on the eCos3.0 to support the real‐time thread model of the TMO scheme. To verify this navigation system, a hardware‐in‐the‐loop simulation (HILS) system also has been developed.

Originality/value

Designing an OFP by using the real‐time object model TMO and the proposed 3D safe path finding algorithm is a whole new effective deadline‐based approach. And the developed OFP can be used intensively in the phase of disaster response and recovery.

Details

Aircraft Engineering and Aerospace Technology, vol. 83 no. 6
Type: Research Article
ISSN: 0002-2667

Keywords

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Book part
Publication date: 10 December 2018

Jennifer Jihye Chun and Yang-Sook Kim

In this chapter, we examine the multifaceted challenges that feminist labor organizations face in decommodifying the lives and labor of poor and working-class women. Using an…

Abstract

In this chapter, we examine the multifaceted challenges that feminist labor organizations face in decommodifying the lives and labor of poor and working-class women. Using an in-depth case study of domestic worker organizing in South Korea, we find that non-governmental organizations (NGOs) such as the National House Managers Cooperative and the Korean Women Workers Association became entangled in hegemonic state projects that linked support for women’s basic livelihoods to the proliferation of part-time, informal domestic work in the context of widespread crises. To challenge the discriminatory and market-driven logics of state-driven social protection efforts, these NGOs have advanced an emancipatory agenda to improve the working conditions, labor rights, and social dignity of domestic workers through consciousness-raising grassroots organizing methods and contentious policy advocacy campaigns. Their social movement transformation goals, however, have been constrained by the relative organizational isolation and limited organizational capacity of feminist labor NGOs in a broader context of neoliberal precaritization and gender-stratified labor markets. The myriad dilemmas facing domestic worker organizing in an era of global hegemonic market rule highlight the need to develop new political imaginaries to contest gender and economic injustice.

Details

Gendering Struggles against Informal and Precarious Work
Type: Book
ISBN: 978-1-78769-368-5

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Article
Publication date: 4 March 2014

Seong Eun Cho and Dong-Hee Shin

This study aims to examine the impact of news frames associated with traditional media and with Twitter discourse on social issues.

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Abstract

Purpose

This study aims to examine the impact of news frames associated with traditional media and with Twitter discourse on social issues.

Design/methodology/approach

Using semantic network analysis, it identifies the role of new alternative channels as well as discussing ways of understanding and consuming news content in the changing media environment. Additionally, it focuses on the dominant Twitter communicators who rank high in betweenness centrality.

Findings

The results confirmed that traditional news media tend to superficially describe main events and media strikes without comment. They tended to consciously or unconsciously favor media corporations by engendering anxiety and conflict or by restraining reports on the rationales of the strike. Twitter discourse, on the contrary, positively represents the striker's arguments and frequently reveals support of the strike.

Research limitations/implications

The data set of this study was specialized, not generalized. However, the findings extend literature relating to the role of journalism and alternative channel. For example, this study indicated that the change of media environment has reinforced partiality of news, including both traditional and alternative channels.

Practical implications

The findings imply that the advent of new media does not purely represent a laymen's voice and rather tends to strengthen the partiality of media, including both traditional and new media, beyond selective exposure on content of the receiver.

Originality/value

By clarifying the influence of alternative channels, this study suggests the counterpart of traditional journalism in the near future.

Details

Info, vol. 16 no. 2
Type: Research Article
ISSN: 1463-6697

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Article
Publication date: 24 November 2017

Byeong Je Kim, Hyung-Guen Park and Ji-Bum Chung

The purpose of this paper is to identify the present structure of the Korean disaster-safety industry and propose ways to promote it.

468

Abstract

Purpose

The purpose of this paper is to identify the present structure of the Korean disaster-safety industry and propose ways to promote it.

Design/methodology/approach

The background of the emergence of the disaster and safety industry in Korea is reviewed, and business networks of 91 companies belonging to the disaster and safety industry in Korea are identified and analysed through a network analysis.

Findings

Korean Government is struggling to nurture the disaster and safety industry as it has been on last few decades. This paper finds that the current industry has an ambiguous market structure, and the industry tends to depend highly on the demand of public institutions.

Practical implications

The concept of the disaster and safety industry is not well established in other countries except for Korea. If Korea successfully fosters its disaster and safety industry through its proper understanding, it would bring both disaster risk reduction and economic benefits.

Originality/value

This paper analyses the market structure of the disaster and safety industry, which is uniquely emerging in Korea and rarely designated as an industry in other countries.

Details

Disaster Prevention and Management, vol. 27 no. 1
Type: Research Article
ISSN: 0965-3562

Keywords

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