Online Users’ Cynical Attitudes towards Privacy Protection : Examining Privacy Cynicism

Hanbyul Choi,Yoonhyuk Jung 한국경영정보학회 2020 Asia Pacific Journal of Information Systems Vol.30 No.3

Understanding of the Fintech Phenomenon in the Beholder’s Eyes in South Korea

Choi, Hanbyul,Jung, Yoonhyuk,Choi, YoungRok Korea Society of Management Information Systems 2019 Asia Pacific Journal of Information Systems Vol.29 No.1

The role of privacy fatigue in online privacy behavior

Choi, Hanbyul,Park, Jonghwa,Jung, Yoonhyuk Pergamon 2018 Computers in human behavior Vol.81 No.-

<P><B>Abstract</B></P> <P>The increasing difficulty in managing one's online personal data leads to individuals feeling a loss of control. Additionally, repeated consumer data breaches have given people a sense of futility, ultimately making them weary of having to think about online privacy. This phenomenon is called “privacy fatigue.” Although privacy fatigue is prevalent and has been discussed by scholars, there is little empirical research on the phenomenon. This study aimed not only to conceptualize privacy fatigue but also to examine its role in online privacy behavior. Based on literature on burnout, we developed measurement items for privacy fatigue, which has two key dimensions —emotional exhaustion and cynicism. Data analyzed from a survey of 324 Internet users showed that privacy fatigue has a stronger impact on privacy behavior than privacy concerns do, although the latter is widely regarded as the dominant factor in explaining online privacy behavior.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Privacy fatigue is a multi-dimensional concept including exhaustion and cynicism. </LI> <LI> There is a significant effect of privacy fatigue on privacy coping behaviors. </LI> <LI> Privacy fatigue has a stronger impact disengagement behavior than privacy concern. </LI> </UL> </P>

Online Users’ Cynical Attitudes Towards Privacy Protection : Examining Privacy Cynicism

Hanbyul Choi,Yoonhyuk Jung 한국경영정보학회 2019 한국경영정보학회 학술대회논문집 Vol.2019 No.11

This study aims to examine a role of privacy cynicism in online users’ privacy behaviors. As the complexity of managing online personal information is increasing and data breach incidents frequently occur, online users feel a loss of control over their privacy. Such a situation leads to their cynical attitudes towards privacy protection, called privacy cynicism. In this study, we assume that privacy cynicism is related to a prevailing phenomenon that online users are inclined to be negligent in making efforts to protect their online privacy, despite the perception of privacy threats. Data were gathered from a survey that 281 people participated in and were analyzed with covariance-based structural equation modeling. Findings reveal that privacy cynicism has not only a direct influence on disclosure intention but also moderates an effect of privacy concerns on the intention. Analytical results also revealed a nonlinear effect of privacy cynicism on the outcome variable. This study contributes to online privacy research by developing the concept of privacy cynicism and its significant role in online privacy behaviors.

Lactobacillus plantarum APsulloc 331261 발효 용해물의 피부 미생물 조절 효과

김한별 ( Hanbyul Kim ),명길선 ( Kilsun Myoung ),이현기 ( Lee Hyun Gee ),최은정 ( Eun-jeong Choi ),박태훈 ( Taehun Park ),안수선 ( Susun An ) 대한화장품학회 2020 대한화장품학회지 Vol.46 No.1

피부에는 여러 종의 미생물들이 군집을 이루며 서식하고 있고, 서로 상호작용을 하며 균형을 유지하고 있다. 하지만, 여드름, 건선 및 아토피 피부염과 같은 질병 상태에서는 피부 미생물의 균형이 깨져 건강한 피부와는 다른 미생물 군집 구성을 보인다. 피부 미생물 군집 구성의 조절은 이러한 피부 질환에 대한 잠재적인 치료 방법이 될 수 있다. Quorum sensing (QS)은 세포간 전달인자로, QS을 조절하면 유해균의 바이오필름 형성이나 효소 분비등을 억제할 수 있고, 이 역시 피부 미생물 군집 구성에 영향을 준다. 이번 연구에서는 아모레퍼시픽의 특허 성분인 유산균 발효 용해물(Lactobacillus plantarum APsulloc 331261, KCCM 11179P 이용)의 QS억제능력 및 피부 유익균과 피부 유해균의 생장에 미치는 영향을 확인하였다. 유산균 발효 용해물 10 μg/mL 처리시, QS에 의해 제어되는 Chromobacterium violaceum의 자주색 안료 생산을 대조군 대비 27.4% 감소시켰다. 또 피부 유익균인 Staphylococcus epidermidis의 생장을 대조군 대비 12% 증가 시켰고, 피부 유해균인 Pseudomonas aeruginosa의 생장을 38.5% 감소, 바이오필름 형성을 17.7% 감소시켰다. S. epidermidis를 같은 속(genus)에 포함되어 있는 대표적인 피부 유해균 Staphylococcus aureus와 함께 공배양 하였을 때 S. epidermidis의 생장은 대조군 대비 134% 증가시켰고, S. aureus의 생장은 13% 억제시켰다. 이러한 결과들을 종합하였을 때 L. plantarum APsulloc 331261을 이용한 발효 용해물은 피부 미생물의 균형을 조절해 줄 수 있는 화장품 원료로 유용하게 사용 될 수 있다고 사료된다. The skin is colonized by a large number of microorganisms with a stable composition of species. However, disease states of skin such as acne vulgaris, psoriasis, and atopic dermatitis have specific microbiome compositions that are different from those of healthy skin. The target modulation of the skin microbiome can be a potential treatment for these skin diseases. Quorum sensing (QS), a bacterial cell-cell communication system, can control the survival of bacteria and increase cell density. Also, QS affects the pathogenicity of bacteria such as biofilm formation and protease production. In this study, we confirmed anti-QS activity of Amorepacific patented ingredients, which are Lactobacillus ferment lysate (using Lactobacillus plantarum APsulloc 331261, KCCM 11179P) through bio-reporter bacterial strain Chromobacterium violaceum. The purple pigment production of C. violaceum controlled by QS was reduced 27.3% by adding 10 μg/mL of Lactobacillus ferment lysate (freeze dried). In addition, the Lactobacillus ferment lysate increased growth of Staphylococcus epidermidis 12% and decreased growth of Pseudomonas aeruginosa 38.5% and its biofilm formation 17.7% at a concentration of 10 μg/mL compared to the untreated control group. Moreover, S. epidermidis was co-cultured with the representative dermatological bacterium Staphylococcus aureus in the same genus, the growth of S. epidermidis was increased 134 % and the growth of S. aureus was decreased 13%. These results suggest that fermented lysate using Lactobacillus plantarum APsulloc 331261 may be useful as a cosmetic ingredient that can control the balance of skin microbiome.

비정상 이벤트 탐지를 이용한 데이터 스토리텔링

연한별(Hanbyul Yeon),안성욱(Sunguk An),최은경(Eun-Kyoung Choi),장윤(Yun Jang) 한국정보과학회 2014 한국정보과학회 학술발표논문집 Vol.2014 No.6

실업팀 사격선수의 열등감 경험 의미

최수정 ( Sujeong Choi ),김한별 ( Hanbyul Kim ) 한국체육대학교 체육과학연구소 2021 스포츠사이언스 Vol.39 No.3

본 연구는 실업팀 사격선수들의 열등감 경험을 바탕으로 이들이 인지하고 해석하는 열등감의 의미를 기술하며, 스포츠 현장에서 나타나는 열등감을 재해석하는 데 목적이 있다. 이를 위하여 사전조사에서 열등감을 경험하는 중이라고 답한 실업팀 평균 5년, 선수 평균 14년 경력의 사격선수 4명으로부터 개인 면담 자료를 수집한 뒤 Max van Manen의 해석학적 현상학적 연구 방법을 사용하여 자료를 분석하였다. 반성적 과정에 따라 나타난 열등감의 본질적 주제는 ‘신체성’ ‘신체’비교를 통한 노하우 개발, ‘시간성’부정적 인식에서 긍정적 인식으로, ‘공간성’한 단계 성장하는 공간, ‘관계성’ 유기적 존재의 관계로 나타났다. 최종적으로 연구 결과는 선수들이 가지는 열등감은 단순히 부정적인 측면을 넘어 한계를 뛰어넘게 만드는 원동력으로 작용한다는 긍정적 결과를 보여준다. 해석학적 글쓰기를 통해 참가자들은 열등감에 대한 부정과 긍정의 해석을 병행하고, Adler가 창안한 개인심리학의 인간관과 같이 목표를 위해 열등감을 동기화하였음을 알 수 있었다. 이들은 미래지향적인 삶의 목적을 가지며, 다음 단계의 발달을 향해 나아갔다. 하지만 선수들이 당연하게 겪는 감정으로 해석되는 열등감은 아직까지 스포츠 현장에서 부정적으로 인식되고 있는 실정이다. 이에 연구자는 본 연구가 열등감을 긍정적으로 활용하기 위한 첫걸음으로 열등감 경험 의미를 이해하고, 스포츠 선수의 열등감을 측정하는 척도 개발의 기초자료로 활용되기를 기대해 본다. The purpose of this study is to describe the meaning of professional shooting players' inferiority experience. The participants for this study were 4 shooting athletes, who were over 5 years with shooting teams. Data were collected by using in-depth interviews and analyzed by using hermeneutic phenomenological method of Max van manen. The essential themes that fit into the context of the 4 existential grounds of body, time, space, and relationship were “develop of know-how through ‘body’s comparison,” “From a negative perception to a positive perception,” “the space of grow to the next level.” and “An inseparable relationship.”. Through Hermenetic Phenomenological Writing, we can fine that the inferiority complex has two sides, one is good function and the other is dysfunction. After feeling an inferiority experience, they synchronized using their inferiority experience for next aim. However, the sense of inferiority, which is interpreted as an emotion that players naturally experience, is still perceived negatively in the sports field. In order to apply these research results to the sports field, it is necessary to develop an inferiority level for athletes as well as an inferiority level counseling program that can be used in the actual field.

Zobellella maritima sp. nov., a polycyclic aromatic hydrocarbon-degrading bacterium, isolated from beach sediment

Lee, Dong Wan,Lee, Hanbyul,Kwon, Bong-Oh,Khim, Jong Seong,Yim, Un Hyuk,Park, Hongjae,Park, Byeonghyeok,Choi, In-Geol,Kim, Beom Seok,Kim, Jae-Jin Microbiology Society 2018 International journal of systematic and evolutiona Vol.68 No.7

디지털 트윈 기술을 통한 지능적인 공공 정책 의사결정의 가능성: 증거 기반 시나리오에 기반한 디지털 트윈 시뮬레이션 모델링

황한찬 ( Hwang Hanchan ),최한별 ( Choi Hanbyul ) 한국행정학회 2023 韓國行政學報 Vol.57 No.1

많은 행정학·정책학 연구자들은 디지털 트윈 기술이 공공 정책 과정을 크게 변화시킬 것으로 전망하고 있으나 정책 의사결정을 위해 디지털 트윈을 어떻게 활용할 것인지에 대해서는 많은 것이 알려지지 않았다. 디지털 트윈 활용은 첫째, 행위자의 행태를 타당하게 설명하는 시뮬레이션 모델링의 구축과 둘째, 시뮬레이션 시나리오를 통한 예측 등의 두 단계로 진행된다. 특히 본 연구는 이 중에서 전통적인 연구 방법을 통해 어떻게 과학적 증거를 가진 시뮬레이션 시나리오를 개발할 수 있는지에 초점을 맞추었다. 이를 위해 디지털 트윈 기반 시뮬레이션 모델링을 적용한 세종시 공공자전거 어울링의 관리 및 운영을 위한 시뮬레이션 시나리오를 어떻게 전통적인 연구 방법 중 하나인 조건부 가치측정법을 활용해 만들 수 있는지 살펴보았다. 이를 통한 분석 결과에 따르면, 세종시 공공자전거 이용자들은 간헐적인 단거리 이동 수요를 중요하게 여기고 현재 공공자전거를 이용하지 않는 잠재적 이용자들은 건강 증진 등 다른 이용 가치를 중요하게 여긴다. 이를 고려하여 본 연구는 공공자전거 대여소 재배치 시나리오를 예시적으로 두 개로 정리하였다. 이상의 논의를 통해 본 연구는 디지털 트윈 기반 시뮬레이션 모델링이 지능적인 공공정책 의사결정을 위하여 어떻게 활용될 수 있는지에 대한 함의를 제공하였다. Researchers expect that digital twin technologies will transform the public policy cycle, but there is a lack of understanding on how digital twin technologies are applied to make policy decisions. Digital twin applications have two steps: 1) to develop a valid digital twin model to explain the behaviors of agents; 2) to predict changing behaviors of agents in various simulation scenarios. This paper focuses on how to develop scientific evidence-based simulation scenarios from traditional research methods in social science. For this purpose, we attempted to create scenarios from the contingent valuation method in estimating the value of the public bicycle-sharing system in Sejong City, where the digital twin model of the system has been developed to enhance its effective and efficient management. Findings suggest that public bicycle users in Sejong City pay attention to the intermittent short-distance movement demands. In contrast, potential users (or non-users) value a variety of usefulness (such as enhancing health). We therefore suggest two scenarios for redeploying public bicycle stations, as an example. This study provides implications for how governments use digital twin simulation modeling to make intelligent public policy decisions.

An integrative process for obtaining lipids and glucose from <i>Chlorella vulgaris</i> biomass with a single treatment of cell disruption

Heo, Young Mok,Lee, Hanbyul,Lee, Changsu,Kang, Juwon,Ahn, Joon-Woo,Lee, Young Min,Kang, Kyu-Young,Choi, Yoon-E,Kim, Jae-Jin Elsevier 2017 Algal research Vol.27 No.-

<P><B>Abstract</B></P> <P>To examine the possibility of better utilizing <I>Chlorella vulgaris</I> biomass including its carbohydrate as well as lipid contents, it was investigated whether cell disruption for lipid extraction could render the remaining microalgal residue (MR) suitable for enzymatic saccharification, possibly due to the disruption of cell wall structures. The <I>C. vulgaris</I> biomass was subjected to lipid extraction with different cell disruption methods (autoclaving, microwave irradiation, osmotic shock, and sonication), and recovered MRs were hydrolyzed using an enzyme produced from <I>Trichoderma koningiopsis</I> KUC21269 in this study. The enzyme was produced on-site with a highly simplified medium of barley straw, an agricultural byproduct. As a result, the saccharification rate of MR treated with microwave was more than twice that of the control group, and microwave irradiation appeared to be a promising method for both lipid extraction and subsequent saccharification. Our results suggested that both lipids and carbohydrates in <I>C. vulgaris</I> can be utilized by applying proper cell disruption method and a fungal enzyme produced on-site using an agricultural byproduct, respectively. This study revealed the high potential of <I>C. vulgaris</I> as an integrated bio-resource for both lipids and glucose, which can be converted to biodiesel and bioethanol, providing clues for overcoming hurdles in economically feasible biofuel production using microalgae.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Both lipids and glucose in <I>C. vulgaris</I> could be obtained with a single treatment. </LI> <LI> Cell disruption for lipid extraction could also damage cell wall structures. </LI> <LI> Lipid-extracted residues were hydrolyzed using a fungal enzyme produced on-site. </LI> <LI> Saccharification rate was more than doubled by microwave irradiation. </LI> <LI> Microwave irradiation enhanced the bioaccessibility of cellulose in the cell walls. </LI> </UL> </P>