The Effect of Beauty Management Behavior of Beauty Shop Customers on Consumer Sentiment Since COVID-19

Kihun Han(Kihun Han),Eunjoo Choi(Eunjoo Choi),Juyeun Park(Juyeun Park) J-INSTITUTE 2023 Protection Convergence Vol.8 No.1

Purpose: Currently, beauty shops are experiencing a crisis of survival due to a decrease in customers due to COVID-19, but research on their survival is lacking. The purpose of this study is to find out how modern people's beauty management behavior due to COVID-19, the social anxiety we are facing affects consumer psychology. Through this, beauty service consumers suffering from COVID-19 seek ways to improve consumer sentiment to use beauty services and reflect this to help prepare countermeasures and establish marketing strategies to cope with the difficulties of industry (mainly face-to-face services) due to COVID-19. hope it can be a resource. Method: The data of this study was an online survey targeting men and women who had experience of using beauty shops nationwide. The data were statistically analyzed using SPSS 25.0, and first exploratory factor anal-ysis was performed to analyze the validity of the measurement tool. Reliability was analyzed using Cronbach's alpha coefficient. Frequency analysis and descriptive statistical analysis were performed, and regression analysis was performed. Results: All hypotheses of this study were accepted. Beauty management behavior had a significant impact on consumer sentiment. Beauty management behavior had a significant effect on safety expectations. Beauty management behavior had a significant effect on psychological compensation. Beauty management behavior had a significant impact on service expectations. Conclusion: The results of this study can be said to verify the relationship between beauty management be-havior and consumer psychology. Since beauty management behavior has been verified as a factor that enhances consumer emotion, it is important to stimulate individual beauty management behavior. Information on active beauty management behaviors using offline and online to meet consumption patterns and individual needs nec-essary to activate beauty management behaviors, prepare improvement and measures for intergenerational in-terest and rapidly changing beauty management behaviors should be provided to consumers.

Development of an ERP-42 based autonomous driving system for the self-driving competition in K-city

Haegyeom Choi(최해겸),Youngioo Kim(김영주),Taeho Kim(김태호),Chanyoung Yang(양찬영),Hyunjoo Choi(최현주),Yeongeun Yu(유영은),Kihun Kweon(권기헌),Donghun Lee(이동훈) 대한기계학회 2020 대한기계학회 춘추학술대회 Vol.2020 No.12

The Effect of Hair Beauty Shop Customers' Perception of General Risks and Beauty Shop Risks on Consumer Sentiment

Juyeun Park(Juyeun Park),Eunjoo Choi(Eunjoo Choi),Kihun Han(Kihun Han) J-INSTITUTE 2023 Protection Convergence Vol.8 No.1

Purpose: As the COVID-19 pandemic began, the concepts that have been used in Korean society are “With Corona” and “Post Corona.” In Korea, social distancing and mask wearing were mostly lifted, but the sense of crisis did not disappear. As consumer sentiment shrank, productivity decreased, and the entire industry was af-fected, the beauty industry (mainly face-to-face services) is also subject to many negative effects. Consumer sen-timent appears irrational and rationally regulates consumption habits. The general risk perception and beauty shop risk perception of COVID-19 were set as factors that affect consumer sentiment of hair beauty service con-sumers. This study aims to provide basic data to present a differentiated strategy that is different from other service fields for the development of the beauty industry. Method: The data of this study were statistically analyzed using SPSS 25.0, and first, an exploratory factor analysis was performed to analyze the validity of the measurement tool. Reliability was analyzed using Cronbach's alpha coefficient. Frequency analysis and descriptive statistical analysis were performed, and chi-square test and multiple regression analysis were performed. Results: Social and environmental risk and economic risk, sub-factors of general risk perception, appeared to have a significant positive (+) effect on consumer sentiment, and human risk, a sub-factor of beauty shop risk perception, had a significant negative (-) effect on consumer sentiment. Was found to have an effect on In other words, it can be said that the higher the social and environmental risk and economic risk, sub-factors of general risk perception, the higher consumer sentiment, and the higher the human risk, the sub-factor of beauty shop risk perception, the lower consumer sentiment. Economic risk (β=.290, p<.001), human risk (β=-.231, p<.01), and social and environmental risk (β=.118, p<.05) affects consumer sentiment in the order has been shown to affect. Conclusion: ‘Presence of regular beauty shops’, ‘Beauty shop selection criteria’, and ‘Reason for reduction in beauty expenditure and items after COVID-19’ according to the age and gender of research subjects differ. There-fore, different marketing methods should be sought for each generation or gender. Since the relationship be-tween risk perception and consumer sentiment has been revealed, it can be utilized to help recover and improve hair beauty shop business in the future.

Eruptive sebaceous hyperplasia induced by systemic corticosteroid

( Kihun Kim ),( Joongwoon Choi ),( Yejin Lee ),( Barklynn Lew ),( Wooyoung Sim ) 대한피부과학회 2019 대한피부과학회 학술발표대회집 Vol.71 No.1

Eruptive sebaceous hyperplasia (ESH) which occurs in multiple lesions of sebaceous hyperplasia at similar time is a rare and poorly understood. Several reports suggest association with immune-suppressant, most commonly cyclosporine. Here we report ESH after systemic steroid for treatment of rapid progressive glomerulonephritis (RPGN). A 70-year old man presented with a 5-years history of asymptomatic papules on the whole face. These multiple papules had 1-3 mm sized, skin colored with central umbilication. He has been treated with peritoneal dialysis due to chronic renal failure occurring after RPGN. He treated with prednisolone for RPGN 6 years ago. 6 months after prednisolone treatment, multiple papules occurred throughout the whole face. We performed biopsy from the cheek. The histopathologic findings revealed central dilated infundibulum attached to multiple enlarged lobules of sebaceous gland. It was consistent with sebaceous hyperplasia. Considering multiple lesions occurring after using prednisolone and histopathologic finding, we diagnosed the patients as ESH. Patient treated with carbon dioxide laser, because of his little renal function. After treatment, he was in good state without recurrence. Accurate mechanism for ESH is not known. But we suggest that it related with androgen level which reduced by steroid treatment. When ESH occurs, the association with the use of systemic steroid needs to be considered.

A case of alopecia totalis with first onset in old age

( Kihun Kim ),( Joongwoon Choi ),( Yejin Lee ),( Barklynn Lew ),( Wooyoung Sim ) 대한피부과학회 2019 대한피부과학회 학술발표대회집 Vol.71 No.1

Alopecia areata (AA) is a common immune-mediated disease typified by multiple round areas of hair loss. It presents as asymptomatic well-defined patches of non-scarring alopecia. One study reports that 85.5% of Asian patients with AA present before 40 years of age. Here, we report an interesting case of newly onset alopecia totalis (AT) in old age. An 85-year-old woman presented with total hair loss including eyebrow and eyelash for 1 year. Hair loss started with a pair of coin sized hairless patches. After hairless patches occurred, she suffered cerebral infarction. And then hair was rapidly fallen and she lost her total scalp hair with eyebrow and eyelash. There was no previous history or familiar history of AA. We performed skin biopsy on the scalp. Histopathologic findings revealed decreased number of hair follicles and peribulbar lymphocytes infiltration. Also, there was no hair follicle substitution to fibrosis or increase of telogen stage hair follicle. Based on these findings, we diagnosed as AT. She was treated with prednisolone and cyclosporine for 10 weeks, without improvement. AA in old age is rare phenomenon. Especially newly onset AT in more than 80 years old is very rare. According to prior research, late onset AA shows mild disease severity and favorable treatment response. But our patient showed severe disease severity with poor treatment response. Here, we report rare case of newly onset AT in old age.

머신러닝기반 양방향 LED-to-LED 통신시스템

김기훈(Kihun Kim),최일원(Ilwon Choi),박수빈(Subin Park),이윤기(Yungi Lee),안병구(Beongku An) 대한전자공학회 2018 대한전자공학회 학술대회 Vol.2018 No.11

경주지진관측망의 배경잡음 분석

민기훈(Kihun Min),신동훈(Dong-Hoon Sheen),김민욱(Minook Kim),최호선(Hoseon Choi) 대한지질학회 2021 대한지질학회 학술대회 Vol.2021 No.10

지진계에는 지진에 의한 진동 외에 다양한 요소로 인해 발생하는 배경잡음도 함께 기록된다. 배경잡음은 관측소 주변의 인간의 활동과 다양한 자연현상에 의해 발생하며, 그 원인에 따라 주파수별 특성이 다르게 나타난다. 본 연구에서는 2019년 11월부터 2021년 8월까지 경주지진관측망(Gyeongju Hi-density Boradband Seismic Network)의 관측소 193개소에서 기록된 연속자료를 이용하여 배경잡음을 분석하였다. McNamara and Buland (2004)의 방법을 사용하여 각 관측소의 파워 스펙트럼 밀도(Power Spectral Density, PSD)를 계산하였으며, 관측소별 배경잡음 수준 및 일변화, 주간변화 등에 대해 조사하였다. 또한 Baische t al . (2012)의 유발지진 관측을 위한 권고사항을 토대로 각 관측소의 배경잡음 수준에 대한 평가를 수행하였다. 0.1~0.5 Hz 대역에서는 나타나는 높은 수준의 배경잡음은 대양에서 기인한 것으로 알려진 2차 맥동으로 인해 나타나는 것으로 알려져 있다. 경주지진관측망의 대부분 관측소에서도 해당 대역에서 높은 수준을 보인다. 계절에 따른 배경잡음 변화를 분석한 결과, 겨울에 높고 여름에 낮게 나타남을 확인하였다. 1~5 Hz 대역의 배경잡음은 일반적으로 인간의 활동으로 인해 나타나는 것으로 알려져 있다. 해당 대역에서의 일변화, 주간변화 등을 분석한 결과 대부분의 관측소가 인간의 활동에 영향을 받는 것으로 추정된다. Baisch et al . (2012)에서는 5~40 Hz 대역 내에서 각 지진계에 기록되는 잡음의 진폭을 가능한 한 1μm/s 이하로 유지해야 한다고 권고하고 있다. 이 권고에 따라 시간 영역의 진폭과 PSD의 관계를 이용하여 각 관측소의 배경잡음을 평가한 결과, 약 50여개의 관측소가 해당 기준을 초과하는 것으로 확인되었다.

유한 상태 기계를 이용한 자율무인기뢰처리기의 다중센서융합기반 수중유도항법시스템 설계

김기훈(Kihun Kim),최현택(Hyun-Taek Choi),이종무(Chong-Moo Lee) 大韓電子工學會 2010 電子工學會論文誌-SC (System and control) Vol.47 No.6

본 연구에서는 실해역에서 해류를 고려한 실용적인 유도 시스템을 제안하고 있다. 본 논문에서는 생성된 경로의 최적성은 주요 이슈가 아니다. 시작점부터 목표점까지의 경로는 주요 해류의 방향축을 고려하여 운용 경험이 많은 전문가의 경유점 선택을 통하여 생성된다. 본 논문에서는 또한 초단기선, GPS, 도플러 속도계 그리고 자세센서 등의 계측치를 통해서 다중센서융합알고리즘을 이용하여 정밀 수중항법 솔루션 구현에 대하여 설명하고 있다. 정밀하고 정확하고 갱신 주기가 빠른 수중항법 솔루션을 구현하기 위하여 세 가지 전략을 사용하였다. 첫째는 추측항법의 단독 성능을 향상시키기 위하여 선수각 정밀 정렬을 수행하였다. 둘째는 기본이 되는 단독추측항법이 적분 알고리즘에 기반을 두었기 때문에 시간의 추이에 따른 누적오차의 증가 특성을 가지고 있는데 이를 막기 위하여 주기적으로 절대 위치 정보를 다중센서융합 기법을 이용하여 융합하여 주는 것이다. 셋째는 융합알고리즘의 품질 향상을 위하여 효율적인 특이점 제거 알고리즘을 도입하는 것이다. 개발된 정밀수중항법알고리즘의 성능을 검증하기 위하여 자율기뢰처리기와 심해무인잠수정의 실해역 데이터를 사용하였다. This research propose a practical guidance system considering ocean currents in real sea operation. Optimality of generated path is not an issue in this paper. Way-points from start point to possible goal positions are selected by experienced human supervisors considering major ocean current axis. This paper also describes the implementation of a precise underwater navigation solution using multi-sensor fusion technique based on USBL, GPS, DVL and AHRS measurements in detail. To implement the precise, accurate and frequent underwater navigation solution, three strategies are chosen. The first one is the heading alignment angle identification to enhance the performance of standalone dead-reckoning algorithm. The second one is that absolute position is fused timely to prevent accumulation of integration error, where the absolute position can be selected between USBL and GPS considering sensor status. The third one is introduction of effective outlier rejection algorithm. The performance of the developed algorithm is verified with experimental data of mine disposal vehicle and deep-sea ROV.

다중센서융합 기반의 심해무인잠수정 정밀수중항법 구현

김기훈(Kihun Kim),최현택(Hyun-Taek Choi),이종무(Chong-Moo Lee),김시문(Sea-Moon Kim),이판묵(Pan-Mock Lee),조성권(Seong-Kwon Cho) 한국해양공학회 2010 韓國海洋工學會誌 Vol.24 No.3

This paper describes the implementation of a precise underwater navigation solution using a multi-sensor fusion technique based on USBL, DVL, and IMU measurements. To implement this precise underwater navigation solution, three strategies are chosen. The first involves heading alignment angle identification to enhance the performance of a standalone dead-reckoning algorithm. In the second, the absolute position is found quickly to prevent the accumulation of integration error. The third one is the introduction of an effective outlier rejection algorithm. The performance of the developed algorithm was verified with experimental data acquired by the deep-sea ROV, Hemire, in the East-sea during a survey of a methane gas seepage area at a 1,500 m depth.

경주지진관측망의 배경잡음 수준을 고려한 지진관측능력 분석

민기훈(Kihun Min),신동훈(Dong-Hoon Sheen),최호선(Hoseon Choi),노명현(Myunghyun Noh) 대한지질학회 2021 대한지질학회 학술대회 Vol.2021 No.10

지진관측망에서 관측 가능한 최소 지진 규모는 관측망의 간격, 분포 등에 의해 좌우될 수 있다. 단일 관측소에서의 관측 가능한 최소 지진 규모는 운영 중인 지진계의 종류, 자체잡음과 같은 기기 특성, 관측소에서 기록되는 배경잡음 수준과도 밀접한 관계를 가진다. 지진의 위치 결정을 위해서는 최소 3개 이상의 관측소에서 지진동이 감지되어야 하므로, 지진관측망에 포함된 관측소의 설치 간격, 분포, 단일 관측소에서의 배경잡음 수준 외에도 지진이 발생하는 위치까지 함께 고려되어야 지진관측망의 지진관측능력을 적절히 평가할 수 있다. 본 연구에서는 Brune (1970)의 지진원 모델과 경주지진관측망(Gyeonju Hi-density Broadband Seismic Network)에서 2019년 11월부터 2021년 8월까지 기록된 배경잡음의 파워 스펙트럼 밀도(Power Spectral Density, PSD)를 사용하여 경주지진관측망의 지진관측능력을 평가하였다. Brune (1970)의 지진원 모델을 이용하여 변위 스펙트럼을 도출하였으며, 지진파의 지속시간을 1초로 가정하여 5 Hz 변위 스펙트럼을 PSD로 변환하였다. 그 다음 도출된 PSD를 진원거리와 규모로부터 얻을 수 있도록 진원거리 10~50 km, 규모 -1.0~3.5에 해당하는 PSD를 계산하여, 진원거리와 규모를 독립변수로 하는 상관관계를 도출하였다. 그리고 Baisch et al . (2012)의 권고사항을 적용하여 관측소에서의 지진관측 여부를 판단하기 위한 기준 식을 아래와 정의하였다. PSD = 30.1 Mw – 0.368 R – 128.4 이 식에서 제시된 PSD를 이용하여 경주지진관측망의 관측 가능한 최소 지진 규모를 결정하였다. 각 관측소의 1~10 Hz 대역에 기록된 배경잡음 PSD를 지진 관측 여부를 판단하기 위한 기준으로 삼았다. 지진이 감지된 관측소의 기준을 5개, 진원 깊이를 10 km로 가정하였을 때, 경주지진관측망에서 전체 시간, 주간, 야간에 따른 관측 가능한 최소 지진 규모는 각각 -0.3~0.1, -0.2~0.2, -0.3~0.1로 평가되었다. 일반적으로 배경잡음 수준이 주간에 비해 야간에 낮으므로, 관측 가능한 최소 규모도 야간에 보다 낮아진다. 이러한 평가 방법은 이론적인 P파 변위 스펙트럼을 단순한 가정에 의해 주파수가 5 Hz인 경우의 PSD로 변환한 것이므로, 향후 경주지진관측망의 지진 목록을 통해 도출된 완전성 규모와 본 연구에서의 최소 지진규모 간 비교 및 해석이 수반될 필요가 있다.