진화 알고리즘을 이용한 단위벡터장 기반의 이동로봇 자세 제어

박현정(HyunJeong Park),이승관(SungGwan Lee),정태충(TaeChung Chung) 대한전자공학회 2007 대한전자공학회 학술대회 Vol.2007 No.11

In this paper, the GA based Univector field method is proposed for mobile robot to accomplish the robot orientation and posture at the target position. Univector field method guarantees the desired posture of the robot at the target position. But we need to know what values of the variables used in Univector is effective to reduce the time to reach and kick the ball to the direction of destination. To solve this problem, We apply genetic algorithm to find the effective values of the variables for the modified Univector field method.

남자 고등학교 사이클 선수의 하반신 유형 분류에 따른 선수용 사이클복 하의 치수설정에 관한 연구

박현정 ( Hyunjeong Park ),도월희 ( Wolhee Do ) 한국의류산업학회 2017 한국의류산업학회지 Vol.19 No.3

People have recently became interested in eco-friendly cycling that attracted further attention as a sport activ-ity. The number of high school cyclists has increased due to the popularity of cycling; however, high school cyclists have trouble choosing cycling suits because there is no professional cycling suit for high school cyclists in Korea. Therefore, it is necessary to develop a professional cycling suit for high school cyclists because sportswear for athletes is an import-ant means to improve performance. This study suggests a standard sizing system for high school student athletes` cycle tights. The subjects were 111 high school cyclists. The 3 clusters were categorized by cluster analysis, and the sizing sys-tem was classified according to three lower body types. The size intervals of waist girth, hip girth and height were 5cm, respectively. The most frequent sizes were 75-100-175 in figure type 1, 70-90-170 and 75-95-170 in figure type 2, 70-90- 175 and 70-90-180 in figure type 3. The sizing system, which had frequencies more than 3.6%, was classified into 9 cases, 8 cases, and 5 cases, respectively by lower body types. The results will contribute to the development of athletic per-formance cycle wear for high school cyclists.

국내외 사이클 웨어 브랜드의 치수체계 조사

박현정 ( Hyunjeong Park ),도월희 ( Wolhee Do ) 한국의류산업학회 2016 한국의류산업학회지 Vol.18 No.5

This study investigated domestic and foreign cycle wear sizing systems for the domestic market and provided basic data for development of a high functional cycle wear with excellent fitness qualities. Each brand was found to have different dimension items and different sizes as well as size deviation and range according to each item. Therefore, a size selected by referring to the dimension items would be expected to have confusion when selecting a size. Domestic brands are able to selects sizes relatively easily because they suggest sizes mainly by height and weight (which are a universal size). However, the development of a sizing system for domestic cycle wear brands is needed because each brand have different sizes according to its dimension items. Foreign brands are also different from domestic brands in size marking items and sizes according to items. Therefore, the establishment of a sizing system standard for foreign brands is necessary because there could be a problem with fitness in the same sizes selected for domestic brands. Cycle wear is also able to cover various body types due to the elasticity of its material; however, and evaluation of fitness and a follow-up study will be necessary to develop cycle wear with a fitness that is proper for a Korean body type.

연구논문 : 선수용 사이클 웨어의 착용 실태 조사 -국내 남자 고등학교 사이클 선수를 중심으로-

박현정 ( Hyunjeong Park ),도월희 ( Wolhee Do ) 한국의류산업학회 2015 한국의류산업학회지 Vol.17 No.4

This study investigates the actual domestic and overseas cyclewear wearing conditions for male high school cyclists. The study results provide factors and degree of dissatisfaction as basic data for cyclewear development. This study was conducted on 35 male high school cyclists (freshman to seniors) by a questionnaire and interview method. Study results were: Male high school cyclists considered functionality as most important when they bought cyclewear and the brand they most often bought was a cheap domestic brand. Dissatisfaction with the crotch, thigh circumference and minimum leg circumference was higher than other parts during wearing. A cyclist is more sensitive to wear because they require more lower body motion than other parts. Cyclewear should be: less transformed even by frequent laundering, made of breathable material and use a sewing technique that minimizes air resistance and increases fit the body. Functional pads ergonomically designed with high tactile materials should be developed to prevent ‘saddle sore’ and groin soreness region that happens because of a lower body bending posture when cycling. A follow-up study is recommended to further develop excellence in cyclewear functionality and dimension suitability for male high school cyclists through the size system.

코로나19가 소비자의 뷰티 분야 카타르시스 소비에 미치는 영향

박현정(Park, Hyunjeong),남미우(Nam, Miwoo) 한국전시산업융합연구원 2021 한국과학예술융합학회 Vol.39 No.1

본 연구는 전 세계적인 코로나19 팬더믹 현상을 배경으로, 미용 산업과 비대면 라이프 스타일을 융합한 마케팅 전략을 제시하였다. 본 연구의 목적은 첫째, 응답자의 가치관 변화에 대해 규명하고, 둘째, 코로나19로 인한 소비자의 라이프 스타일 변화를 규명하고, 셋째, 코로나 19로 인한 소비자의 구매 행동 변화를 규명하는 것이다. 본 조사는 대한민국 성인 여성, 남성 30명을 대상으로 2020년 6월 15일부터 6월 30일까지 총 16일에 걸쳐 심층 면접을 진행하였다. 연구 결과는 다음과 같다. 첫째, 연구 대상은 20-50대 성인 남녀 각 15명으로 구성되었고, 응답자의 대부분은 20-30대로 대학생이 40%를 이루고 있다. 응답자들이 추구하는 가치관은 가족관계, 자신의 삶, 경제적 안정, 타인과의 관계, 인생의 목표 순으로 나타났고, 응답자의 자존감 자기지각 정도를 응답하게 한 결과 평균 3.96점으로 나타났다. 둘째, 응답자들의 라이프 스타일 변화는 경제활동의 축소, 사회적 거리두기로 인한 사회적 활동의 제한, 여가활동의 제한, 집합 모임에 대한 두려움, 위생에 대한 인식 강화, 온라인 구매 활동 증가, 카타르시스 소비로 나타났다. 또한, 응답자들은 마스크 착용의 일상화로 인해 다양한 불편함을 겪고 있는 것으로 나타났다. 셋째, 응답자들의 구매 행동 변화는 홈코노미소비, 필요 소비, 뷰티 제품 및 패션 제품의 소비로 나타났다. 특히 뷰티 제품은 카타르시스 소비의 제품유형으로 나타났다. 본 연구는 코로나19가 소비자의 뷰티 분야 카타르시스 소비에 미치는 영향을 규명하였고, 미용 산업과 비대면 소비 행동을 융합한 마케팅 방안을 제시하였다. 이러한 연구 결과는 관련 분야의 학술 연구를 위한 기초 자료 제공 및 뷰티 산업의 매출 개선을 위한 시사점 제공으로 활용할 수 있을 것이다. The purpose of this study is: 1. Establishing the values of respondents. 2. Identifying the lifestyle changes of consumers due to COVID-19. 3. Identifying changes in consumers" purchasing behavior due to COVID-19. The survey was conducted in depth interview with 30 respondents aged 20-50 years from June 15 to June 30, 2020. The results of this study are as follows: First, the research subjects consisted of 15 adult men and women in their 20s and 50s, and most of the respondents were in their 20s and 30s, with 40 percent of college students. The values that respondents pursued were in the order of family, their own life, economic stability, their relationship with others, and their life goals, and the average of respondents" perceived self-esteem was 3.96. Second, the respondents" changed lifestyles are as follows; reduced economic activity, limited social activities, limited leisure activities, increased online purchasing, catharsis consumption, fear of collective gathering, and awareness of hygiene. In addition, respondents were found to be experiencing a variety of inconveniences due to the everyday use of masks. Third, the change in purchasing behavior of respondents was attributed to consumption of home economy, consumption of necessary, and consumption of beauty products and fashion products. Beauty products have been shown as product types of catharsis consumption. This study identified the impact of COVID-19 on the catharsis consumption of beauty consumers in the beauty sector and suggested a marketing strategy that combines the beauty industry with non-face-to-face consumption behavior. The results of these studies could be used to provide basic data for academic research in related fields and to provide implications for improving sales in the beauty industry.

남성 소비자의 모발 염색에 관한 위험 지각과 퍼스널 컬러 진단에 따른 모발 시술에 대한 만족도 연구

박현정(Park, Hyunjeong),남미우(Nam, Miwoo) 한국전시산업융합연구원 2018 한국과학예술융합학회 Vol.34 No.-

본 연구는 최근 미용 시장에서 남성 소비자의 영역이 확대되고 있는 현상을 바탕으로 남성들의 모발 염색에 대한 태도와 위험 지각 요소를 파악하고, 퍼스널 컬러 진단 시술 후 만족도를 분석하여 남성 뷰티 산업 마케팅의 기초자료가 되는 것을 목적으로 한다. 본 조사는 2017년 6월 30일부터 2017년 7월 1일까지 모발 염색 무료 시술을 희망하는 서울, 경기에 거주하는 20대 남성들 중 염색 시술 유경험자와 무경험자를 목적적 표본 추출하여 15명을 선발하였고, 이들을 대상으로 개인의 퍼스널 컬러를 진단하고 모발 염색 실험을 한 후 자유응답형 설문지 응답과 심층면접을 하였다. 첫째, 20대 남성의 모발 염색 인식을 살펴본 결과, 염색 유경험자는 모발 염색을 긍정적으로 생각하고 자신을 가꾸는 외모관리행동으로 여기는 것으로 나타났다. 염색 무경험자는 유경험자에 비해 눈에 튀는 색상의 염색을 더 부정적으로 인식을 가지고 있었다. 둘째, 남성의 모발 염색 동기를 살펴본 결과, 기분전환 및 스트레스 해소, 계절 변화, 자기 개성 표출, 주변인을 보고, 버진헤어에 대한 불만과 새치 커버로 나타났다. 셋째, 남성의 모발 염색 위험 지각에 대해 알아본 결과, 염색 유경험 응답자들은 신체적, 심리적, 경제적, 사회적, 기능적 위험 순으로, 염색 무경험 응답자들은 경제적, 사회적, 심리적, 신체적, 기능적 순으로 위험을 지각하고 있었다. 염색 무경험자들은 유경험자들에 비해 모발 염색 시술에 대한 위험을 복합적으로 인식하여 기능적 위험, 심리적 위험, 사회적 위험이 동시에 나타났다. 넷째, 남성의 퍼스널 컬러 진단이 시술 만족도에 미치는 영향을 알아본 결과 염색 유경험자들은 기존 시술 과정에서는 알 수 없었던 고민 해결이 되었고, 재시술을 넘어서 지인들에게 추천하겠다는 충성고객의 모습을 띄었다. 염색 무경험자들은 염색 시술에 상당한 흥미를 가졌고, 기존에 가지고 있었던 염색에 관한 불안감이 퍼스널 컬러 진단을 통해 감소되었다는 의견을 보였다. 이에 따라, 염색에 부정적이던 기존의 태도를 버리고 재시술을 원하는 응답자가 많은 것으로 나타났다. 본 연구는 퍼스널 컬러 진단이 소비자의 구매 결정을 수월하게 해줄 뿐만 아니라, 만족도를 상승시켜 구매 후 평가를 높여주는 것을 규명하였다. 남성 소비자의 모발 염색 인식과 동기 및 위험 지각과 퍼스널 컬러 진단이 시술 만족도에 미치는 영향을 분석하여 뷰티 산업에서 주목받고 있는 남성 소비자의 특성을 이해하는 것에 의의가 있다. 또한, 남성을 대상으로 한 미용 산업의 마케팅 전략 수립에 이용될 수 있다. As the male consumption in the beauty market increases, we investigate the attitude and the risk perception factors of the male consumer towards the hair coloring. Based on the analysis of the satisfaction after the personal color diagnosis and treatment, we expect the research can be used for the industry marketing of the male grooming. The survey is conducted for men in their 20s who are interested in the free hair coloring and live in Seoul or Kyonggi from June 30, 2017 to July 1, 2017. The total 15 subjects including both the experienced and the inexperienced with hair color are selected using the purposive sampling. We conduct the in-depth interviews and surveys with the subjects after the personal color diagnosis and the hair coloring. First, the subjects in their 20s who have the hair color experience, think positively about the hair coloring and regard it as the appearance management. The subjects who does not have the hair color experience, are more negative about the hair coloring compared to them who have. Second, the motives of the male hair coloring are the diversion and the stress relieving, the seasonal changes, the expressions of the individuality, the people around them, the dissatisfaction with the virgin hair, covering gray hair. Third, the researchers who had a experience on the hair coloring are able to identify their risks for hair coloring in order of physical, psychological, economic, social, and functional risks, on the other hand, people who has never dyed, perceive them in order of economic, social, psychological, physical, functional risks. Also, the researchers who had a experience on the hair coloring are more likely to recognize the risks of hair dye treatments in a complex way than those who did not, simultaneously showing the functional, psychological, and social risks. Fourth, after the treatments, the subjects who have the hair color experience are interested in the personal color diagnosis including its total process and responded they would like to recommend it to their acquaintance. The subjects who does not, satisfy with the hair coloring itself. This research is meant to make sense of the character of male consumers in the beauty industry. Also, it can be used to develop the marketing strategies of the beauty industry for the male.

고등학교 남자 사이클 선수의 상반신 유형 분류에 따른 선수용 사이클 웨어 상의 치수체계에 관한 연구

박현정 ( Hyunjeong Park ),도월희 ( Wolhee Do ) 한국의류학회 2020 한국의류학회지 Vol.44 No.6

Upper body types were classified to develop the sizing system of the cycling wear top for the high school male cyclist. The research methods were performed using the anthropometric measurements of 111 high school male cyclists that included cluster analysis was performed. The research results are as follows. Type 1 (23.4%) has the longest biocromion length, is the tallest of the three types and a proper body type. Type 2 (25.2%) has the largest weight and developed muscles in the chest parts. Type 3 (51.4%) is the shortest of the three types and is a skinny body with a bending back. In order to develop a sizing system, the 12 anthropometric measurements were selected for correlation analysis. The bust circumference and stature were presented as the control dimensions of sizing system. The waist front, waist back length and biacromion length were less correlated with other items; consequently, they were independent items and were set as referable dimensions. Therefore, it was proposed as a sizing system because the 5 cm of bust and 5 cm of stature have a high coverage by body type. The total coverage rate was 81.9%.

스티어링 기어, 크레들 및 어태치먼트 시스템의 내구 시험 방법 연구

박현정(Hyunjeong Park),임재철(Jaechul Yim),유정민(Jungmin Ryoo),양준석(Junsuk Yang),한교진(Kyojin Han) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11

These days, chassis part validation has saved time and expenses by executing bench test in the lab instead of full vehicle road test. However, it shows difficulties to demonstrate all vehicle parts motion in the full vehicle simulation test due to test boundary condition. Especially, steering gear system is hard to be reproduced in the full vehicle simulation test because it is difficult to turn the steering wheel. To compensate these problems, several kinds of steering system tests are running in the lab, apart from full vehicle tests. This study is to address a method to validate steering gear, cradle, structure and attachment system laboratory durability test.

차량용 트레일러 히치 시스템의 내구 시험 방법 연구

박현정(Hyunjeong Park),장대성(Daesung Jang),한교진(Kyojin Han) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5

These days, accessories part validation has saved time and expenses by executing bench test in the lab. instead of full vehicle road test. However, it shows difficulties to demonstrate all vehicle parts motion in the full vehicle simulation test. Especially, trailer hitch system is hard to be reproduced in the full vehicle simulation test because it is difficult to set up the trailer in the test laboratory. To compensate these problems, several kinds of trailer hitch system tests are running in the laboratory apart from full vehicle tests. This study is to address a method to validate trailer hitch system and body attachment laboratory durability test.

잠재결과변인에 대한 시간의존 처치의 종단 선택편의 조정을 위한 역확률 처치가중방법의 적용: 구조방정식으로의 확장과 모의실험 연구

박현정(Hyunjeong Park),변상민(Sangmin Byeon) 한국교육평가학회 2020 교육평가연구 Vol.33 No.2

많은 교육 연구에서는 인과추론을 위하여 통계모형을 적용하고 있으나 비실험 및 관찰자료의 경우, 인과효과를 담보하기에 어려움이 있다. 이러한 문제에 대한 보정방법 중 하나가 경향점수로 Hong & Raudenbush(2008)는 이를 확장하여 시간의존 처치의 선택편의 조정방법을 제안하였다. 한편, 교육 연구에서 널리 활용되는 구조방정식에서는 종단모형이 흔히 활용되지만 다수의 공변인을 통제하기 어렵다는 한계가 존재하였다. 이 점에 착안하여 이 연구는 Hong & Raudenbush(2008)가 제안한 역확률 처치가중방법이 구조방정식에서 잠재결과변인에 대한 종단 처치효과의 선택편의를 조정하는 방법으로 확장될 수 있음을 논의하였다. 또한, 모의실험을 통해 표본크기(n=100, 300, 500, 1,000)와 처치 비율(1:1, 1;4)을 고려하여, 공변인의 지연효과가 있을 때 누락으로 인한 편의를 탐구하였다. 모의연구 결과, 올바른 모형으로 추정된 IPTW는 처치의 지연효과, 횡단효과, 배가효과를 모두 편향이 작은 것으로 나타났다. 한편, 지연효과를 가지는 공변인을 누락한 경우, IPTW는 횡단처치효과를 크게 과대추정하였다. 이러한 결과를 통해 이 연구에서 제안한 방법이 잠재변인을 이용하여 측정오차를 줄이면서도 공변인으로 인한 종단적 선택편의를 효율적으로 통제할 수 있는 방법임을 보일 수 있었다. 이상의 결과를 바탕으로 실제 분석에서 공변인의 성격, 표본크기, 처치 비율과 관련하여 고려할 사항을 논의하였다. A myriad of educational studies employ statistical models for causal inference. However, it is difficult to ensure causal effects for non-experimental or observational data. One of attempts to resolve the conundrum is the propensity score, and Hong & Raudenbush (2008) extended it to adjusting a selction bias for time-varying treatments. On the other hand, longitudinal models using SEM have a limitation in including a number of covariates despite their widespread use in educational research. In this regard, the present study suggested that the inverse probability of treatment weighting(IPTW) proposed by Hong & Raudenbush(2008) could be extended to longitudinal SEM with latent outcome. In addition, we implemented a simulation study to explore bias of estimates in the presence of omitted covariates which have a lagged effect on the time-varying treatment, considering sample sizes (n=100, 300, 500, 1,000) and treatment ratios (1:1, 1:4). The results indicated that IPTW by the correct model estimated the lagged-effect, cross-sectional effect, and amplified effect close to true values. In the case of omitting covariates, the IPTW was found to substantially overestimate the cross-sectional effect. These results implied that the method proposed in this study might be an efficient way to adjust selection bias along with reducing measurement errors by applying latent outcomes. Based on the above results, considerations in relation to characteristics of covariates, sample size and treatment ratio were discussed.