Designing Cellular Mobile Network Using Lagrangian Based Heuristic

Jung Man Hong(홍정만),Jong Hyup Lee(이종협) 대한산업공학회 2011 대한산업공학회지 Vol.37 No.1

다중회귀분석과 Mahalanobis Distance 이상치 탐색방법을 이용한 고강도 콘크리트 강도 예측 모델 개발에 관한 연구

홍정의 ( Jung Eui Hong ) 대한설비관리학회 2011 대한설비관리학회지 Vol.16 No.2

High-performance concrete(HPC) is a new terminology used in concrete construction industry. Several studies have shown that concrete strength development is determined not only by the water-to-cement ratio but also influenced by the contents of other concrete ingredients. HPC is a highly complex material, so it is very difficult task to modeling its behavior. This research aimed to predict the compressive strength of HPC with multiple linear regression analysis. Mahalanobis Distance(MD) outlier detection method used for the purpose of detecting outlier and increase prediction ability of regression analysis. The detailed procedure of calculating Mahalanobis Distance (MD) is described. The effects of outlier compared with before and after at the multiple linear regression.

서포트 벡터 머신을 이용한 질병의 진단에 관한 연구

홍정의 ( Jung Eui Hong ) 대한설비관리학회 2014 대한설비관리학회지 Vol.19 No.2

Support Vector Machines (SVM) are supervised learning algorithms that analyze data and recognize patterns and used for classification and regression analysis. Specially, SVM is an linear classifier to perform in such a way as to minimize the generalization error. In this study, SVM apply to diagnosis breast cancer. Breast cancer test data have 9 test parameters 2 class and 683 patients. Randomly select some patients as a train data for SVM train and predict the other patient data. The diagnosis results are compared with both different train data size and different training parameters.

헤어미용종사자의 회복탄력성이 이직의도에 미치는 영향 - 직무스트레스 매개효과를 중심으로 -

홍정아 ( Jung-a Hong ),홍보경 ( Bo-kyung Hong ) 한국디자인트렌드학회 2019 한국디자인포럼 Vol.24 No.1

연구배경 통계청의 전국사업체 조사에 따르면, 두발 미용업은 꾸준히 증가하고 있으며, 종사자수 또한 증가하는 추이를 보이고 있어 더 많은 발전과 인력 창출을 기대하게 됨으로써 헤어미용산업에 종사하는 인력에 대한 심층적인 연구가 필요하다. 이에 따라 직무로부터 발생하게 되는 스트레스를 중심으로 연구를 설계하였고, 직무스트레스의 크기는 개인의 회복탄력성 정도에 따라 달라질 수 있으며, 결과적으로 이직의도를 발생시킬 수 있는 중요한 요소임을 인지하고, 인력자원을 충족하는데 집중해야 할 것이다. 연구방법 독립변수로 회복탄력성, 종속변수로 이직의도, 매개변수로 직무스트레스를 설정하였다. 미용실 직원 687명을 대상으로 설문을 진행하였고, SPSS를 사용하여 분석을 실시하였다. 연구결과 본 연구의 조사결과, 헤어미용종사자들의 회복 탄력성은 직무스트레스와 이직의도에 부(-)의 영향을 미치고, 직무스트레스는 이직의도에 정(+)의 영향을 미치며, 직무스트레스는 회복탄력성과 이직의도 간의 부분매개효과를 가지는 것으로 분석되었다. 결론 헤어미용종사자들의 직무스트레스를 조절하는 회복탄력성을 향상시킬 수 있는 프로그램 개발 및 적용이 필요하며, 미용업체는 인적자원관리 시스템을 구축하여 업체경쟁력을 키우는 것이 매우 중요하겠다. Background According to a survey on cosmetology businesses across the country by Statistics Korea, the number of hairdressing businesses has gradually increased. At the same time, the number of hair salon employees has been on the rise as well. With expectations of further growth and job creation, there should be in-depth studies on hairdressing manpower. This study focused on stress at work. The degree of job stress can vary depending on an individual’s resilience level. Considering the fact that it is a crucial element which can cause turnover intention, it is a time to concentrate on enhancing manpower. Methods Resilience was establised as an independent variable, turnover intention was set up as an dependent variable, and job stress as parameters in this study. A questionnaire was conducted on 687 employees of the hair salon. SPSS were used for analysis. Result Resilience has a negative effect on job stress and turnover intention while job stress reveals a positive influence on turnover intention. In addition, job stress showed a partial mediating effect between resilience and turnover intention. Conclusion It is crucialritical to manage hairdressers’ job stress and urgent to develop and apply a program which can enhance resilience. It is also very important for hair salons to develop a decent human resources management system and build their competitiveness.

Integer Programming Approach for the Outsourcing Decision Problem in a Single Machine Scheduling Problem with Due Date Constraints

Jung Man Hong(홍정만),Ik Sun Lee(이익선) 한국경영과학회 2013 經營 科學 Vol.30 No.2

In this paper, we considers the outsourcing decision problem in a single machine scheduling problem. The decision problem is to determine for each job whether to be processed on an in-house manufacturing or external facilities(outsourcing). Moreover, this paper considers a situation where each job has a due date. The objective of the problem is to minimize the outsourcing cost, subject to the due date constraints. The considered problem is proved to be NP-hard. Some solution properties and valid inequalities are derived, and an effective lower bound is derived based on the LP-relaxation. The results of experimental tests are presented to evaluate the performance of the suggested lower bound.

헤어미용서비스종사자의 리질리언스(resilience)가 이직의도에 미치는 영향 :소진 매개효과를 중심으로

홍정아(Jung-A Hong),홍보경(Bo-Kyung Hong) 한국인체미용예술학회 2019 한국인체미용예술학회지 Vol.20 No.2

This study investigated the resilience effects on turnover intention of hair salon workers. In order to find new factors that affect turnover intention, researcher selected the field of resilience and burnout. This study focused on burnout at work. The degree of burnout can vary depending on an individual’s resilience level. Considering the fact that it is a crucial element which can cause turnover intention, it is the time to concentrate on enhancing manpower. Resilience was establised as an independent variable, turnover intention was set up as an dependent variable, and burnout as parameters in this study. A questionnaire was conducted on 687 employees of the hair salon. SPSS were used for analysis. The results found the following : First, resilience has a negative effect on burnout and turnover intention while burnout reveals a positive influence on turnover intention. Second, burnout showed a partial mediating effect between resilience and turnover intention. It is crucial to manage hair salon service employees’ burnout and urgent to develop and apply a program which can enhance resilience. Securing positive personnel can increase the securement rate of regular customers and have competitiveness in image improvement and sales improvement than other salons.

제품 디자인을 위한 저채도(near - achromatic)색에 관한 연구

홍정인(Jung-In Hong),이윤진(Yun-Jin Lee),이영화(Young-wha Lee),김수정(Su-Jeung Kim) 한국색채학회 2012 한국색채학회 논문집 Vol.26 No.3

본 연구는 내수용 제품 디자인을 할 때 가장 폭넓게 사용되고 있는 무채색과 혼동하고 있는 저채도(near-achromatic)색의 범위와 여기서 추출된 색들이 어떠한 디자인 스타일과 관계하고 있는지 알아보고자 했다. 이에 모집단의 표본은 제품과 색채 디자인 분야에 많은 지식과 경험을 가지고 있으며, 색의 미세한 톤의 변화까지 파악할 수 있는 5년 이상 경력을 보유하고 있는 전자제품 디자이너와 색채 디자이너 각 10명씩 총 20명의 전문가집단을 대상으로 조사Ⅰ과 Ⅱ가 진행되었다. 조사Ⅰ은 전자제품 디자인을 함에 있어 주로 사용하고 있는 저채도색의 사용범위를 파악하고자 하였으며, 조사Ⅱ는 저채도색 범위로 선정된 색이 감성 공간 안에서 어떤 디자인 스타일에 위치하고 있는지 파악하고자 하였다. 첫째, 조사Ⅰ의 결과 전체 유채색 범위에서 전자제품 디자인에서 많이 사용하고 있는 저채도색의 사용범위를 보면 NCS 순색도(chromaticness) 02에 해당하는 색은 모두 저채도색의 범위에 들어가 비교적 유사하였지만, 색상에 따라 조금씩 저채도색의 범위가 달라진다는 것을 알 수 있었다. 그 범위는 우선 노랑의 경우 가장 넓게 저채도색의 범위가 추출되었는데, NCS 순색도 05의 NCS 검정색도(blackness) 10과 20에 위치한 색과 NCS 순색도 10의 검정색도 50의 색을 포함하고 있었다. 다음으로는 파랑과 초록이 NCS 순색도 05의 NCS 검정색도 10과 20에 위치한 색을 포함하고 있었다. 마지막으로 빨강의 저채도색의 범위가 가장 작았는데, NCS 순색도 05의 검정색도 20에 위치한 색만 포함하고 있었다. 둘째, 조사Ⅱ의 결과 저채도색 범위로 선정된 색을 전체 출현빈도로 보았을 때 2사분면에 위치한 ‘내추럴-고상한’ 감성 요인을 많이 갖고 있었고, 반면 4사분면의 ‘발랄한-독특한’ 감성 요인은 적었다. 셋째, 조사Ⅱ의 결과 저채도색 범위로 선정된 색의 색상에 따른 디자인 스타일의 경향은 많은 상관성이 없는 것으로 나타났다. 넷째, 조사Ⅱ의 결과 저채도색 범위로 선정된 색의 뉘앙스에 따른 디자인 스타일의 경향은 많은 연관성이 있었는데, 디자인 스타일에 따라 ‘독특한-발랄한’의 4사분면부터 시작하여 ‘고상한-독특한’의 3사분면으로 갈수록 NCS 검정색도가 90쪽으로 높아져, 명도가 낮아지는 것을 알 수 있었다. This study is to find out the range of near-achromatic color which is often confused as achromatic color which is the most widely used colors in designing, and to find the relationship between the color extracted from the range with the design style it is used for. To accomplish this study, two kinds of surveys, survey I and survey II, were carried out on twenty(20) participants. Ten(10) product designers and ten(10) color tone designers that has at least 5 year experience to have knowledge and experience of product color tone design and are also able to distinguish minimum color and tone difference. Survey I focused on finding the range of near-achromatic color that is frequently used when designing a product. And survey II focuses on finding the design style of the colors extracted from the near-achromatic color range within the emotional space. The results are shown as follows; firstly the range of near-achromatic colors in the chromatic color range is relatively similar to each other but the range itself of near-achromatic colors differs from different types of hues. Its range gets smaller while the color moves from yellow to blue and green to red. Secondly, the colors chosen in survey II as the near-achromatic color range were colors having the highest frequency and was occupied in the second quadrant of the emotional space; ‘natural-elegant’; while the least frequency showing colors of emotional space was the fourth quadrant, ;‘lively-unique". Thirdly, survey II also proved that there were low correlations in the tendency of design style with the colors chosen as the near-achromatic color range. Fourthly, survey II showed that the nuance of the color selected from the range of near-achromatic color had a high correlation with the design style. Also according to the design style, the NCS blackness became 90 making the brightness get darker as it moved from the fourth quadrant, ;‘unique-lively", to the third quadrant; ‘elegant-unique".

선호직업별 여성의 헤어스타일 연출관련행동에 관한 연구 -초·중·고 여학생들의 선호직업을 중심으로-

홍정아 ( Jung-a Hong ),홍보경 ( Bo-kyung Hong ) 한국미용학회 2018 한국미용학회지 Vol.24 No.5

In modern society, the participation of women in the labor force has been common. For success at work, an image that fits perfectly with the job improves self-esteem and enhances a positive image across society. Therefore, a personal image could represent his/her job with a significant effect. For such image creation, hairstyling is essential. Therefore, this study attempted to sort the occupations preferred by elementary, junior high, and high school girls who would soon become career women and investigate hairstyling-related behaviors in those preferred jobs. Furthermore, such behaviors were divided into the following: self-presentation, visits to a beauty salon, motive for hairstyling and trend orientation. The results found that self-presentation, visits to a beauty salon, motive for hairstyling and trend orientation showed significant differences by occupation. Therefore, it is necessary for hairdressers to create more satisfying and convenient hairstyles considering customers’ occupation and image. With the perception that the occupations mentioned in this study are those that have long been wanted, not just temporarily desired, this study targeted to help future career women have an image of success. In consideration of women’s self-hairstyling behavior, furthermore, it is necessary to propose hairstyles that can be easily done by customers.

TV 드라마 속 여성 직업군에 따른 헤어스타일 연구

홍정아(Jung A Hong),이재숙(Jae Sook Lee) 한국인체미용예술학회 2015 한국인체미용예술학회지 Vol.16 No.1

In a modern capitalist society, working women are a common phenomenon. For this, first impression toward the desired organization becomes a strategic marketing tool to express suitability with the desired job. In modern society, diverse images are found by occupation. Under these circumstances, a hairstyle which best suits each job can be stereotyped as the image of each job. In getting this kind of job, first impression is significantlyinfluenced by trend-setting TV stars or celebrities. Therefore, this study analyzed actresses' rolesin TV series and investigated job distribution and hairstyles by age. This study examined hairstyles as a strategic tool to make a first impression effectively and attempted to suggest hairstyles by occupation to career-interrupted women to help them get a job again.

Mahalanobis Taguchi System을 이용한 척추질환 환자의 진단에 관한 연구

홍정의(Jung Eui Hong) 한국산업경영시스템학회 2012 한국산업경영시스템학회지 Vol.35 No.4

The Mahalanobis-Taguchi System is a diagnosis and predictive method for analyzing patterns in multivariate cases. The goal of this study is diagnosis of the spondylolisthesis from biomedical data that is derived from the shape and orientation of the pelvis and lumbar spine. The data set has six attributes including pelvic incidence, pelvic tilt, lumbar lordosis angle, sacral slope, pelvic radius and grade of spondylolisthesis and two class including normal and abnormal. From University of California at Irvine machine learning repository, 100 normal and 150 spondylolisthesis patient’s data were used for this study. Mahalanobis Taguchi System (MTS) application process and the diagnosis results were described in this paper.