UAV LRU Layout Optimizing Using Genetic Algorithm (유전알고리즘을 이용한 무인항공기 장비 배치 최적 설계)
-
- Journal of the Korean Society for Aeronautical & Space Sciences
- /
- v.48 no.8
- /
- pp.621-629
- /
- 2020
LRU layout is a complex problem that requires consideration of various criteria such as airworthiness, performance, maintainability and environmental requirements. As aircraft functions become more complex, the necessary equipment is increasing, and unmanned aerial vehicles are equipped with more equipment as a substitute for pilots. Due to the complexity of the problem, the increase in the number of equipment, and the limited development period, the placement of equipment is largely dependent on the engineer's insight and experience. For optimization, quantitative criteria are required for evaluation, but criteria such as safety, performance, and maintainability are difficult to quantitatively compare or have limitations. In this study, we consider the installation and maintenance of the equipment, simplify the deployment model to the traveling salesman problem, Optimization was performed using a genetic algorithm to minimize the weight of the connecting cable between the equipment. When the optimization results were compared with the global calculations, the same results were obtained with less time required, and the improvement was compared with the heuristic.
The purposes of this research were 1) to identify shopping orientation according to customer's personality type, 2) to examine perceived importance of service and satisfaction of service related to customer's personality type, 3) to find the relationships of evaluation of salesperson's service and re-purchase intention in each of customer's personality types. The data were collected via self-administered questionnaires from 434 female formal wear shoppers. and were analyzed by frequency, factor analysis, ANOVA, Chi-square test, and multiple regression analysis. The results of this study were as follows: Shopping orientations varied according to customer's personality type. E type had stronger Hedonic/self-confidence than I type, F type had higher Depending decision making than T type and P type had higher Quick decision making than J type. And service items satisfied the customers with a certain personality type. E type was satisfied with timely and proper A/S, not forcing to purchase and trustful behavior of salesperson more than I Type was. And also with expertise, individualized care, polite attitude, and merchandising promotion. N type was satisfied with individualized care more than S type was. A service evaluation criterion affected the re-purchase intention for a customer with a certain personality type. Customer's convenience in E. I. S, N, T, F, J types had a significant effect on re-purchase intention. And Expertise/ care in E, N, T, J types had a positive effect on re-purchase intention. also Politeness in E, I, S, N, T, J, P types did. But in only E type, Merchandising promotion affected re-purchase intention.
Purpose: The purpose of this study was to examine the effects of customer violence experiences, protection systems, and monitoring systems on the subjective health status of salespersons and electronic machine repairers. Methods: A total of 934 persons were sampled nationwide, including 582 salespersons and 352 electronic machine repairers, from March 2~30, 2020 and asked to fill out a self-reported questionnaire. Results: The findings show that electronic machine repairers were more exposed to customer violence and had a weaker protection system than salespersons. They also experienced severe control from management through a monitoring system. The regression analysis revealed that verbal violence had a negative impact on the subjective health status of electronic machine repairers (p=.021). A worker protection system had significant effects on the improved subjective health status of salespersons (p=.009). Depression and fatigue had negative impacts on the subjective health status of both salespersons (depression: p<.001, fatigue: p<.001) and electronic machine repairers (depression: p<.001, fatigue: p=.002). Conclusion: These findings put a greater emphasis on the need for worker protection systems to prevent workplace violence and a health promotion program to manage depression and fatigue in workplaces.
This study aims to examine the important factors of flower shops' store attributes influencing the repurchase intention for people who buy flowers for themselves with a hedonic shopping motivation. This study was verified by empirical survey and the results are summarized as follow. First, it was found that price, salesperson's professionalism, store accessibility had a significant positive impact on the repurchasing intention of flowers. Second, it was found that price is the first important factor influencing the repurchasing intention of flowers, and next salesperson's professionalism is the second important one, and lastly store accessibility is the third important one. For implications of this study, this study investigated the cause-and-effect relationship between flower shops' store attributes and the repurchasing intention of flowers for people who buy flowers for themselves with a hedonic shopping motivation, so it provides a theoretical foundation for further studies.
Conceptualization of store image have been suggested in the past by many marketing scholars. The dominant perspective about store image is treated as the results of a multi-attribute model. Store image is expressed as a function of the salient attributes of a particular store that are evaluated. Though, there is a little confusions about what elements compose the store image, most scholars agree that merchandise, service, atmosphere, physical facilities, comfort, and location are generally accepted elements as store image. A considerable researches support that shopping can provide both hedonic and utilitarian value. Hedonic shopping value reflects the value received from fantasy and emotive aspects of shopping experience, while utilitarian shopping value reflects the acquisition of products. These two types of shopping value can affect shopping satisfaction. This study examines the relationships among stores images(store atmosphere, salespeople services, facilities, product assortment, and store location), shopping values(utilitarian shopping value and hedonic shopping value), and shopping satisfaction based on discount stores (E-Mart, Home plus, and Lotte Mart). The author hypothesized that five store image components affect shopping values, and these shopping values affect shopping satisfaction. The author focused on the roles of perceived retail crowding between these relationships. Specifically, the author hypothesized that perceived retailing crowding moderated the relationship between shopping values and shopping satisfaction. The author also hypothesized the direct effect of perceived retail crowding on shopping satisfaction. Finally, the author hypothesized that five store image components affect directly shopping satisfaction. Research model is presented in
Trust is central to human relationships, at all times and places. The importance of trust is fundamental in all areas of human life, not only in the area of business administration. 2,500 years ago in China, Confucius taught that the foundation of politics was the trust of the people, more important even than military strength or the supply of food. Shakespeare's play, "Much Ado about Nothing' is about trust and deception. These days, trust and transparency in a commercial organization's business culture form the basis of the 'social capital' by which that organization increases its productivity. A successful company raises productivity by the accumulation of social capital, derived from a trust relationship between business partners, and between the company and consumers. Trust is the crucial factor. At the national level, building trust determines a nation's competitiveness. For a company, long term trust relationships with customers are essential for its survival in a business environment of rapid change. Such relationships, based on trust, are important assets to ensure a company's competitive advantage, and need to be organic to that company's business culture. Because of this importance, trust relationships have been studied in diverse areas within business administration, and especially within marketing, where they form the basis of a successful relationship between producer and consumer. However, what has been lacking is a unified definition of trust. Research has been conducted on the basis of various definitions and models. The majority of researchers have not considered the multidimensional character of the concept of trust until now. Approaches based on a one dimensional model have undermined the value of research results. Furthermore, researchers have only considered trust and trustworthiness as a single component. The majority of research has explored the consequences of perceived trust for outcomes such as loyalty or cooperation, but has neglected the effects of trustworthiness upon the mechanisms of consumer trust. This study focuses on the dimension of trust from such a perspective. It seeks to verify the effect of trust on customer intentions by breaking it down into three separate components: 1) the salesperson, 2) the product/service, and 3) the company. The purposes of this paper are as follows: Firstly, we review the multidimensional nature of trust objects: the salesperson, the product/service, and the company. Secondly, we analyze the relationship between multidimensional trust and trustworthiness. Thirdly, we analyze the connection between trust and repeat purchase intentions for the maintenance of long term relationships. For these purposes the author has developed several hypotheses as follows: H1-1: The competence of a salesperson is positively associated with the trust given by the consumer to the salesperson. H1-2: The benevolence of a salesperson is positively associated with the trust given by the consumer to the salesperson. H2-1: The competence of product/service is positively associated with the trust given by the consumer to the product/service. H2-2: The benevolence of product/service is positively associated with the trust given by the consumer to the product/service. H3-1: The reputation of a company is positively associated with the trust given by the consumer to the company. H3-2: The physical environment of a company is positively associated with the trust given by the consumer to the company. H4-1: Trust in a salesperson is positively associated with repeat purchase intentions. H4-2: Trust in a product/service is positively associated with repeat purchase intentions. H4-3: Trust in a company is positively associated with repeat purchase intentions. The data was compiled from 366 questionnaires. 500 questionnaires were collected, but some of the data was considered unsuitable and inappropriate. The subjects of the survey were male and female customers purchasing products at department stores in Seoul, Daegu and Gyeongbuk. It was carried out between Oct. 25 and 29, 2007. The data was analyzed by frequency analysis using SPSS 12.0 and structural equation modeling using LISREL 8.7. The result of the overall model analysis is as follows: Chi-Square=445.497, d.f.=185, p-value=0.0, GFI=.901, RMSEA=.0617, NNFI=.986, NFI=.981, CFI=.989, AGFI=.864, RMR=.0872. The results of the overall model analysis were coherent. It was found that trust is a multi-dimensional construct, that each of the dimensions of trust are meaningful influences on customer's repurchase intention. Trust in a company may be the most relevant, while trust in a product/service and a salesperson may be less relevant to repurchase intentions. The effective factors in determining trust in a salesperson and a company's product/service were found to be competence and benevolence. Factors in determining trust in a company were its reputation and physical environment, and the relationship of each effective trust factor has been verified in this research. As a result, it was found that competence and benevolence have a meaningful influence on trust in a salesperson and in product/service. It was also found that a company's reputation influences the overall trust in the company significantly but a company's physical environment does not have much effect.
This study investigates the perception of conflict and satisfaction factors by salesperson of department store middle management system. This study was performed through a qualitative research method. An in-depth interview was given to 14 fashion shop managers and salespeople who have three or more years of department store work experience. The results show two categories of factors(factors according to power sources and factors according to job environment) that influence the perception of department store middle management system by fashion product salesperson. The factors(according to power sources) were classified into coercive power, reward power, expert/informational power, and referent power. The factors(according to job environment) were classified into physical environment, work conditions, and regulations.
The purposes of this study were to investigate the impacts of empowerment, job satisfaction, and organizational commitment on service quality. So, this research attempted to test the hypothesized relationships between service quality and its determinants such as job satisfaction, organizational commitment, and customer orientation. To measure these hypotheses, total 200 questionnaires were handed out and 185 were collected. Finally 163 questionnaires were used for the analysis, while 22 were found to be invalid. The frequency analysis, factor analysis, reliability analysis, and multiple regression were conducted after coding and cleaning by SPSS 18.0 The result of this study are as follow. As a result of multiple regression, it shows that empowerment have an effect on job satisfaction, organizational commitment, and service quality. And it shows that job satisfaction and organizational commitment have an effect on service quality.
본 논문은 확장성(scalability)과 견고함(robustness)을 강조하는 새로운 형태의 병렬 분산 메타-휴리스틱 프레임워크를 제안하고 있다. PADO (Parallel And Distributed Optimization framework) 라고 이름 지어진 본 프레임워크는 이종의 계산 및 통신 자원들을 활용하여 메타-휴리스틱 알고리즘을 병렬화하고 스케일러블한 속도 향상을 얻을 수 있다. 본 프레임워크는 기존의 시퀀셜(sequential) 최적화 프레임워크에 메타-휴리스틱 알고리즘의 병렬화 기법중 하나인 island 모델을 개선하여 구현하였다. 본 연구는 부분적으로 정렬된 지식 공유 방법(Partially Ordered Knowledge Sharing) 모델을 이용하여 병렬 환경 코디네이션(coordination) 오버헤드를 줄였고 계산 노드에 대한 확장성을 얻었다. 본 프레임워크를 통해 기존의 많은 메타-휴리스틱 알고리즘들을 재사용 할 수 있고 다양한 분야의 최적화 문제에 적용 할 수 있으며 계산량이 많은 메타-휴리스틱 알고리즘을 병렬화를 통해 문제를 푸는 시간을 단축 할 수 있다. 순회 판매원 문제(Traveling Salesman Problem)를 통해 프레임워크의 실효성을 검증하였다.
There are a lot of people trying to solve the Traveling Salesman Problem (TSP) by using the Meta Heuristic Algorithms. TSP is an NP-Hard problem, and is used in testing search algorithms and optimization algorithms. Also TSP is one of the models of social problems. Many methods are proposed like Hybrid methods and Custom-built methods in Meta Heuristic. In this paper, we propose the S-MINE Algorithm to use the MINE Algorithm introduced in 2009 on the TSP.
. To test model and hypotheses, data were collected from 114 consumers located mid-size city in local area. The author employs PLS methodology (SmartPLS 2.0) to test hypotheses. Data analysis results indicate that among five store images salespeople services, and store location affect utilitarian shopping value. Store atmosphere, salespeople services, and store location affect hedonic shopping value. Two shopping values affect shopping satisfaction. Hedonic shopping value affect more shopping satisfaction than utilitarian shopping value. Data analysis results is presented in . The author examines the moderating effects of perceived retail crowding between shopping values and shopping satisfaction. Results indicate that there are no moderating effects between shopping values and shopping satisfaction. Moderating effects of perceived retail crowding between utilitarian shopping value and shopping satisfaction are presented in
. Moderating effects of perceived retail crowding between hedonic shopping value and shopping satisfaction is presented in
. The author analyzed the relationship between perceived retail crowding and shopping satisfaction using WarpPLS 3.0 which can analyze the non-linear relationship. Result indicates that perceived retail crowding affects directly shopping satisfaction and there is a non-linear relationship between them. Among five store image components, store atmosphere and salespeople services affect directly shopping satisfaction. The author describes about the managerial implications, limitations, and future research issues.
The Relationship between Trust, Trustworthiness, and Repeat Purchase Intentions: A Multidimensional Approach
(신뢰대상의 다차원적 접근법에 의한 신뢰와 재구매 의도와의 관계)
Fashion Product Salesperson's Perception of Department Store in Department Store Middle Management System
(백화점 중간관리 형태에서 패션제품 판매원의 백화점에 대한 인식)
The Effects of empowerment on job satisfaction, organizational commitment and Service Quality
(판매원의 임파워먼트가 직무만족과 조직몰입 및 서비스품질에 미치는 영향)
A Parallel and Distributed Meta-heuristic Framework
(병렬 분산 메타-휴리스틱 프레임워크)
S-MINE Algorithm for the TSP
(TSP 경로탐색을 위한 S-MINE 알고리즘)
이메일무단수집거부
이용약관
제 1 장 총칙
제 2 장 이용계약의 체결
제 3 장 계약 당사자의 의무
제 4 장 서비스의 이용
제 5 장 계약 해지 및 이용 제한
제 6 장 손해배상 및 기타사항
Detail Search
Image Search
(β)