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Article
Publication date: 1 April 2022

Khin Thida San and Yoon Seok Chang

The purpose of this study is to solve NP-Hard drone routing problem for the last-mile distribution. This is suitable for the multi-drones parcel delivery for the various items…

222

Abstract

Purpose

The purpose of this study is to solve NP-Hard drone routing problem for the last-mile distribution. This is suitable for the multi-drones parcel delivery for the various items from a warehouse to many locations.

Design/methodology/approach

This study conducts as a mission assignment of the single location per flight with the constraint satisfactions such as various payloads in weight, drone speeds, flight times and coverage distances. A genetic algorithm is modified as the concurrent heuristics approach (GCH), which has the knapsack problem dealing initialization, gene elitism (crossover) and gene replacement (mutation). Those proposed operators can reduce the execution time consuming and enhance the routing assignment of multiple drones. The evaluation value of the routing assignment can be calculated from the chromosome/individual representation by applying the proposed concurrent fitness.

Findings

This study optimizes the total traveling time to accomplish the distribution. GCH is flexible and can provide a result according to the first-come-first-served, demanded weight or distance priority.

Originality/value

GCH is an alternative option, which differs from conventional vehicle routing researches. Such researches (traveling time optimization) attempt to minimize the total traveling time, distance or the number of vehicles by assuming all vehicles have the same traveling speed; therefore, a specific vehicle assignment to a location is neglected. Moreover, the main drawback is those concepts can lead the repeated selection of best quality vehicles concerning the speed without considering the vehicle fleet size and coverage distance while this study defines the various speeds for the vehicles. Unlike those, the concurrent concept ensures a faster delivery accomplishment by sharing the work load with all participant vehicles concerning to their different capabilities. If the concurrent assignment is applied to the drone delivery effectively, the entire delivery can be accomplished relatively faster than the traveling time optimization.

Details

Aircraft Engineering and Aerospace Technology, vol. 94 no. 8
Type: Research Article
ISSN: 1748-8842

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Article
Publication date: 5 September 2016

Woo Ram Kim, Namuook Kim and Yoon Seok Chang

This paper aims to explore methods of defining ejecting zones (EZs) used in automatic picking systems (APSs), particularly in A-frame APSs. An A-frame APS automatically ejects…

680

Abstract

Purpose

This paper aims to explore methods of defining ejecting zones (EZs) used in automatic picking systems (APSs), particularly in A-frame APSs. An A-frame APS automatically ejects products onto a conveyor, which then brings the products to their destination. EZs are moving zones on a conveyor, and each EZ corresponds to one picking order. Products are ejected as a zone passes channels in which the products are stored.

Design/methodology/approach

First, three EZ types are defined, and their operations are explained. Second, picking orders are analyzed and categorized by considering the structure and the picking mechanism of an A-frame APS. In addition, picking-order instances reflecting actual data are randomly generated according to each category. Finally, the performance of the EZs is evaluated using the picking-order instances and computer simulations.

Findings

The results from the computer simulations suggest the EZ types suitable for use with various picking order types considering order fulfilment speed and energy usage.

Research limitations/implications

In this paper, the authors only adopt a triangular distribution which is considered most practical distribution in the industry.

Practical implications

It is believed that these results can provide managers and operators with useful guides to facilitate the effective operation of an A-frame APS. The provided ideas have been implemented at the pharmaceutical warehouse of the largest logistics company in Korea.

Social implications

The result shows that the proposed idea could save energy consumption and the APS have potential to save labor involvement in picking.

Originality/value

It is essential to define the EZs when operating an A-frame APS efficiently, but there is almost no research in this area. This paper focuses on defining EZs, as well as methods to utilize these zones.

Details

Assembly Automation, vol. 36 no. 4
Type: Research Article
ISSN: 0144-5154

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Article
Publication date: 12 April 2011

Hyo Won Han, Yoon Seok Chang and Myung Ryul Choi

The purpose of this paper is to present a new way of manufacturing process in the plant of the leading weedicide manufacturing company in Korea, Dongbu.

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Abstract

Purpose

The purpose of this paper is to present a new way of manufacturing process in the plant of the leading weedicide manufacturing company in Korea, Dongbu.

Design/methodology/approach

This paper explains a design of Auto‐ID based weedicide manufacturing process, introduces new mechanism for assembly machine and presents simulation approach to understand potential benefit.

Findings

In Dongbu, there was no information matching among bottle, box and pallet levels. Another issue was error propagation. Because, the allowance range for weight difference is different depending on the level of unit, the small weight difference (i.e. deviation) within allowance range in bottle level can create errors when accumulated for boxing. The proposed method improved performance measures such as cycle time and cost of raw materials by introducing Auto‐ID technology. As in the simulation results, it is considered that adoption of radio frequency identification together with this automatic module will improve manufacturing performance drastically.

Originality/value

The research was based on the real world implementation of Auto‐ID based manufacturing in weedicide manufacturing company and discussed a new approach which addresses the current issues of industry.

Details

Assembly Automation, vol. 31 no. 2
Type: Research Article
ISSN: 0144-5154

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Expert briefing
Publication date: 27 May 2022

Yoon won the March 9 presidential election by a tiny margin and was sworn in on May 10. He is a career prosecutor who has never held political office before. His skills and vision…

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Article
Publication date: 28 July 2020

Hak Yoon Kim, Joon Hyung Park and Hyun Jeong Kim

The purpose of this study is to identify and explore what leadership characteristics constitute humanistic leadership in the South Korean context. Moreover, this study examines…

675

Abstract

Purpose

The purpose of this study is to identify and explore what leadership characteristics constitute humanistic leadership in the South Korean context. Moreover, this study examines how these leadership characteristics are connected to Korean culture.

Design/methodology/approach

Based on the information gathered from semi-structured interviews and other sources, including books, case study articles and news articles, this study captures a more comprehensive perspective of Mr. Kook-Hyun Moon, the former CEO of Yuhan–Kimberly.

Findings

The key characteristics of Mr. Moon's humanistic leadership that are identified in this study are: respect for all mankind, benevolence (seeking the greater good), sincerity (building trusting relationships with stakeholders) and continuous learning and innovation (developing self and others). These key characteristics set Mr. Moon apart from other leaders and are connected to the fundamental values and philosophies of Korean culture.

Originality/value

This study contributes to the current leadership literature by identifying and exploring Mr. Moon's humanistic leadership characteristics that enable him to gain respect and contribute to communities and society in the South Korean context. This study also finds that the humanistic leadership characteristics of Mr. Moon reflect three major attributes of Korean culture: the ideology of the Dangun mythology, the principle of Neo-Confucianism in Korea and jeong – an indigenous cultural concept in Korea (these attributes will be discussed in detail in the South Korean values and philosophies section). Such reflection suggests that investigating how humanistic leadership characteristics are connected to local cultural roots is important to enhance the understanding of humanistic leadership.

Details

Cross Cultural & Strategic Management, vol. 27 no. 4
Type: Research Article
ISSN: 2059-5794

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Expert briefing
Publication date: 1 April 2022

This comes during a particularly bumpy transition in Seoul from an outgoing administration to a new one. President-elect Yoon Suk-yeol’s five-year term starts on May 10.

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DOI: 10.1108/OXAN-DB268337

ISSN: 2633-304X

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Article
Publication date: 14 March 2022

Joonho Moon, Myungkeun Song, Won Seok Lee and Ji Min Shim

This study aims to explore the structural relationship among food quality, usefulness, ease of use, convenience, brand trust and willingness to pay. The technology acceptance…

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Abstract

Purpose

This study aims to explore the structural relationship among food quality, usefulness, ease of use, convenience, brand trust and willingness to pay. The technology acceptance model was used as the theoretical foundation of this work.

Design/methodology/approach

Amazon Mechanical Turk was used to recruit survey participants, and 436 valid observations were ultimately used for the analysis. In the data analysis, the structural relationships between variables were explored through structural equation modeling.

Findings

The results of hypothesis testing show that ease of use positively affects the usefulness of the Starbucks mobile application. Usefulness also exerts positive impacts on both brand trust and convenience. Moreover, brand trust is positively associated with food quality. Finally, willingness to pay is positively influenced by both convenience and brand trust.

Originality/value

This study contributes to the literature by not only validating the technology acceptance model using the Starbucks mobile application but also proposing food quality-related attributes in the domain of the café business.

Details

British Food Journal, vol. 125 no. 1
Type: Research Article
ISSN: 0007-070X

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Expert briefing
Publication date: 20 September 2024

Two days later, the platform apologised, having ignored Seoul’s concerns for years. With digital sex crimes proliferating fast, many involving minors as victim and/or perpetrator…

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DOI: 10.1108/OXAN-DB289772

ISSN: 2633-304X

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Book part
Publication date: 22 December 2005

Young-Myon Lee and Michael Byungnam Lee

While the origin of Korean Industrial Relations goes back 150 years when the country opened its seaports to foreign countries, it didn’t emerge as a field of study until 1950s…

Abstract

While the origin of Korean Industrial Relations goes back 150 years when the country opened its seaports to foreign countries, it didn’t emerge as a field of study until 1950s when academics began to write books and papers on the Korean labor movement, labor laws, and labor economics. In this paper, we sketch this history and describe important events and people that contributed to the development of industrial relations in Korea. Korean industrial relations in the early 20th century were significantly distorted by the 35-year-Japanese colonial rule (1910–1945). After regaining its independence, the U.S. backed, growth-oriented, military-based, authoritarian Korean government followed suit and consistently suppressed organized labor until 1987. Finally, the 1987 Great Labor Offensive allowed the labor movement to flourish in a democratized society. Three groups were especially influential in the field of industrial relations in the early 1960s: labor activists, religious leaders, and university faculty. Since then, numerous scholars have published books and papers on Korean industrial relations, whose perspectives, goals, and processes are still being debated and argued. The Korean Industrial Relations Association (KIRA) was formed on March 25, 1990 and many other academic and practitioner associations have also come into being since then. The future of industrial relations as a field of study in Korea does not seem bright, however. Issues regarding organized labor are losing attention because of a steadily shrinking unionization rate, changing societal attitude toward labor unions, and the enactment of new and improved laws and regulations regarding employment relationships more broadly. Thus, we suggest that emerging issues such as contingent workers, works councils and tripartite partnership, conflict management, and human rights will be addressed by the field of industrial relations in Korea only if this field breaks with its traditional focus on union and union–management relations.

Details

Advances in Industrial & Labor Relations
Type: Book
ISBN: 978-0-76231-265-8

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Expert briefing
Publication date: 17 December 2020

Despite all this, his ruling Democratic Party (DP) has used its rare parliamentary majority to force through a raft of far-reaching legislation affecting politics, the economy and…

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DOI: 10.1108/OXAN-DB258283

ISSN: 2633-304X

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