치과위생사의 이동형 구내방사선 촬영에 관한 방사선 방어 교육, 지식, 수행에 관한 연구

유정민,강보선,김설희 한국치위생학회 2017 한국치위생학회지 Vol.17 No.6

Objectives: The purpose of this study is to evaluate radiation safety education, knowledge and practice of dental hygienists in using handheld portable intraoral X-ray equipment and to suggest the need for radiation safety education in using handheld portable intraoral X-ray equipment. Methods: We surveyed 223 dental hygienists from July, 2017 to August in the dental clinics of Daejeon, Seoul and Gyeonggi area. Results: Radiation safety educational experience was higher in a year's career (72.9%), than 3 years experience (32.5%) (p<0.05). 82.7% of dental clinic workers took university education for radiation safety education while 55.6% of dental hospital workers took company training (p<0.05). More than 70% of the subjects did not have experience of radiation safety education about using portable intraoral X-ray. Radiation safety knowledge was highest in a year’s career (p<0.05). The cumulative dose, radiation sensitivity, and lead defense knowledge were high in all subjects, but knowledge related to scattering radiation and scattering radiation sources was low. Practice of portable intraoral X-ray safety was significantly lower than knowledge. Conclusions: Knowledge of portable intraoral radiography safety is available, but performance is poor. Even with the small amount of radiation exposure, the risk is perceivable. There is a need to actively utilize the provided radiation protection products. In order to do this, efforts should be made to improve knowledge and perfor

탄성파 탐사자료와 전자탐사자료를 이용한 저류층 물성 동시복합역산

유정민,변중무,설순지,Yu, Jeongmin,Byun, Joongmoo,Seol, Soon Jee 한국지구물리·물리탐사학회 2018 지구물리와 물리탐사 Vol.21 No.1

탄성파 역산은 유가스 집적이 가능한 구조의 탐지에 고해상도의 분해능을 가지는 반면, 인공송신원을 이용한 해양전자탐사 역산은 유가스의 직접적인 탐지가 가능하다. 이런 이종의 물리탐사자료를 함께 이용한 복합역산은 단일 역산의 불확실성을 줄일 수 있고, 각각의 탐사자료가 가지는 장점 또한 함께 이용할 수 있다. 이 연구에서는 암석물리모델을 이용하여 탄성파탐사자료와 전자탐사자료가 동시에 최적화 될 때의 저류층의 물성값을 추출할 수 있는 동시복합역산 알고리듬을 개발하였다. 상호구배(cross-gradient) 방법을 적용하여 구조적인 해상도를 향상시켰으며, 최대우도추정법을 이용한 상대 가중치를 적용하여 자료간의 균형을 조절하였다. 개발된 알고리듬을 단순한 고립 가스층 모델에 적용한 결과, 동시복합역산으로 고해상도의 저류층 물성 추출이 가능함을 확인하였다. 하지만 오일 저류층을 모사한 배사구조의 모델에서는 적용된 모델 가중 행렬에 따라 전혀 다른 결과를 획득할 수 있었다. 따라서, 기존의 알고리듬을 각각의 모델 변수에 적합한 모델 가중 행렬을 사용하도록 수정하여, 평활화 기법과 감쇠항 기법을 수포화율과 공극률에 각각 적용하였다. 개선된 알고리듬을 오일 저류층 모델에 다시 적용한 결과, 저류층의 공극률과 수포화율을 성공적으로 추출할 수 있었다. 개발한 복합역산 알고리듬을 이용하여 획득한 결과는 유가스전 저류층의 매장량 계산에 직접적인 정보로 사용될 수 있을 것이다. Seismic inversion is a high-resolution tool to delineate the subsurface structures which may contain oil or gas. On the other hand, marine controlled-source electromagnetic (mCSEM) inversion can be a direct tool to indicate hydrocarbon. Thus, the joint inversion using both EM and seismic data together not only reduces the uncertainties but also takes advantage of both data simultaneously. In this paper, we have developed a simultaneous joint inversion approach for the direct estimation of reservoir petrophysical parameters, by linking electromagnetic and seismic data through rock physics model. A cross-gradient constraint is used to enhance the resolution of the inversion image and the maximum likelihood principle is applied to the relative weighting factor which controls the balance between two disparate data. By applying the developed algorithm to the synthetic model simulating the simplified gas field, we could confirm that the high-resolution images of petrophysical parameters can be obtained. However, from the other test using the synthetic model simulating an anticline reservoir, we noticed that the joint inversion produced different images depending on the model constraint used. Therefore, we modified the algorithm which has different model weighting matrix depending on the type of model parameters. Smoothness constraint and Marquardt-Levenberg constraint were applied to the water-saturation and porosity, respectively. When the improved algorithm is applied to the anticline model again, reliable porosity and water-saturation of reservoir were obtained. The inversion results indicate that the developed joint inversion algorithm can be contributed to the calculation of the accurate oil and gas reserves directly.

Effects of Imagery-evoking Augmented Reality on Experiential Value in Mobile Shopping Apps

유정민 국제e-비즈니스학회 2018 e-비즈니스 연구 Vol.19 No.6

This study investigates the effects of mental imagery on consumer experiential value when consumers use augmented reality (AR) in mobile shopping applications. Female online shoppers (n = 275) in Korea participated in an online survey. The result showed that mental imagery derived from AR positively influenced playfulness, efficiency, visual appeal, entertainment, and service excellence in experiential value. Efficiency, visual appeal, and entertainment positively influenced behavioral intentions, but playfulness and service excellence did not. These results have practical implications for mobile retailers seeking to develop effective product presentation strategies.

조현병 환자에서 와해된 언어의 증상학적 개념화

유정민,김보미,이경민,장은영,이강욱,최준호,박선철 대한조현병학회 2015 대한조현병학회지 Vol.18 No.2

Objectives : Our study aimed to present the distinctive correlates of disorganized speech in patients with schizophrenia, using theScale for the Assessment of Thought, Language and Communication (TLC scale). Methods : We compared the formal thought and other clinical characteristics between schizophrenia inpatients with (n=82) andwithout (n=80) disorganized speech. Psychometric scales including the TLC scale, Brief Psychiatric Rating Scale (BPRS), YoungMania Rating Scale (YMRS), Calgery Depression Scale for Schizophrenia (CDSS) and Word Fluency Test (WFT) were used. Thepresence or absence of disorganized speech was established using transformed dummy variable of score on the Clinician-RatedDimension of Psychosis Symptom Severity (CRDPSS). Results : After adjusting the effects of age, sex and total scores on the BPRS, YMRS and WFT, the subjects with disorganizedspeech presented significantly higher score on the poverty of contents of speech (p=0.001), distractible speech (p<0.0001), tangentiality(p<0.0001), derailment (p<0.0001), incoherence (p<0.0001), ilogicality (p<0.0001), word approximations(p=0.003), loss of goal (p<0.0001), blocking (p=0.006) and self-reference (p=0.002) items than those without disorganizedspeech. With defining the mentioned item scores as covariates, binary logistic regression model predicted that derailment (p=0.0001)and poverty of contents of speech (p<0.0001) were significant independent-correlates of disorganized speech in patients withschizophrenia. Conclusion : Our findings suggest that derailment and poverty of contents of speech are significant correlates of disorganizedspeech in patients with schizophrenia. Our findings might be used to evaluate disorganized speech in patients with schizophreniaefficiently.

전력산업구조개편 담론의 재구성

유정민 한국환경정책학회 2010 한국환경정책학회 학술대회논문집 Vol.2010 No.10

케로신/액체산소 농후 비평형 연소의 Soot 생성 특성

유정민,이창진 한국항공우주학회 2007 한국항공우주학회 학술발표회 논문집 Vol.- No.-

라이프스타일 분석을 통한 자동차의 의미에 관한 연구 - 20대를 중심으로 -

유정민,나건 한국디자인문화학회 2016 한국디자인문화학회지 Vol.22 No.1

From the beginning of the 21st century, advancements in technology have led to dramatic changes worldwide, offering people a better quality of life. Thus, people’s awareness of and expectations toward technology-based products has also increased. Unfortunately, however, advanced technology does not always meet people’s expectations and refined requirements. The automobile industry is no exception to this global tendency. Advances in information technology (IT) have presented new challenges for the automobile industry. Over the past five years, a decreasing demand for automobiles has been observed for people in their twenties, who are familiar with IT devices such as iPads and smart phones. Considering the consuming power of people in their twenties, intensive research and study is required to develop new automobile concepts that will lead to significant breakthroughs in the industry. To understand this emerging market of people in their twenties and the subsequent changes in product perception and demand, a series of trend studies were conducted using the three main codes of STEEP: society, economy, and technology. Further analysis was performed using “double sidedness,” “coexistence of valued and extravagant consumption,” and “gratification of human’s deficient needs.” In-depth interviews were conducted to deduce individuals’ experiences and perceptions toward automobiles. The KJ method was employed as the primary method of analysis. The results indicated that people in their twenties consider the automobile as a device, a private space, and a means of self-expression. Thus, three new automobile attributes are conceptualized: digitized, personalized, and diversified exteriors. 21세기부터 첨단기술의 발달은 사람들에게 보다 나은 삶을 제공해 주고 있다. 그에 따라 사람들의 사물에 대한 인식은 바뀌고 있고, 첨단 기술기반의 사물에대한 기대가 높아지고 있다. 하지만 기대 산업 군에서의 기대수요가 나타나지 않고 있는 시점이다. 자동차산업 군 또한 그 기대수요를 충족시키지 못하고 있다. 특히, 최근에 인터넷과 스마트 기술에 익숙한 20대의자동차 수요가 5년째 꾸준히 하강하고 있다. 그러므로20대의 라이프스타일의 이해와 차량의 의미를 심도있게 고찰하고 이를 바탕으로 자동차의 컨셉 요소들이 연구되어야 한다. 따라서 이 논문에서는 20대의 라이프스타일을 이해가기 위해 STEEP 방법을 통해 트렌드 리서치를 실행하였고, 각 카테고리(사회, 경제, 기술)에서 3가지 트렌드 키워드를 도출하였다. 종합적으로 사회에서는 개인과 그룹간의 양면성, 경제에서는 가치소바와 무모한소비의 공존, 기술에서는 인간의 부족함의 완성 라는 소결을 내렸다. 또한 20대들이 생각하는 자동자의 의미를분석하기 위해 1:1 심층 인터뷰 (In-depth interview) 사용자 리서치를 진행하였고, KJ Method를 사용해 그들의 경험과 인식을 바탕으로 자료를 분석 하였다. 그결과, 자동차는 20대에게 하나의 디바이스이며, 자신을표출하는 도구이고, 개인화된 공감이라는 소결을 내렸다. 두 가지 리서치 분석 결과를 바탕으로, 20대의 차량의미를 고려한 세 가지(digitalized, personalized, and diversified exterior options) 자동차 컨셉을 제시하였다.

작은도서관의 증가 요인 분석: 자원 확보 및 정당성 압력 요인을 중심으로

유정민,장용석 한국행정학회 2019 韓國行政學報 Vol.53 No.2

A small-library serves as a public library to reduce the knowledge gap among citizens and to build a cohesive community. We identified the factors affecting the growth of small-libraries in Korea. Specifically, we note that resource acquisition and legitimacy pressure are the key determinants leading to the quantitative growth of small-libraries. Analyzing 16 metropolitan local governments from 2010 to 2017, we found that the number of public small-libraries increases as legal and social legitimacy accrue and the new organizational form becomes legitimate. In contrast, private small-libraries grow in numbers when related resources are more available to the local governments. This trend of expansion is less to do with direct local needs and actual demands. This study explores under what conditions the growth and change of public sector organizations depend on conformity to legitimacy pressure and resource requirements rather than on functional demands. 우리나라에서 작은도서관은 지식 격차를 줄이는 공공도서관으로의 역할과 마을공동체의 구심적 역할을 동시에 수행하고 있는 시설이다. 이에 대한 사회적 중요성이 확대되면서 그 수가 폭발적으로 증가하였지만, 질적 성장은 이에 미치지 못하다는 지적이 존재한다. 무엇이 이러한 괴리를 초래하였을까? 본 연구에서는 이러한 질문에 답하기 위하여 작은도서관의 증가에 영향을 미치는 요인을 파악하고자 하였다. 구체적으로 자원 확보 및 정당성 압력이 작은도서관의 양적 성장을 이끄는 요인임에 주목하고 이를 실증적으로 분석하였다. 2010-2017년을 기준으로 16개 지방정부 자료를 분석한 결과, 공립은 주로 정당성 압력에, 사립은 자원 확보에 관한 요인에 영향을 받으며 그 수가 증가하고 있음을 확인하였다. 이러한 결과는 공공부문 조직의 증가와 변화가 기능적 필요와 사회적 수요 요인보다는 제도적 환경에의 조응(conformity)과 자원 확보 전략에 따라 결정되어 실제 운영상의 디커플링(decoupling)이 발생할 수 있음을 시사한다.

The Effect of Brand Image Inconsistency on Patronage Intent in U.S. Multi-channel Retailing

유정민,김민정 대한가정학회 2011 International Journal of Human Ecology Vol.12 No.2

Website design (due to increased online retailing) has received more attention as a way to influence consumer responses (Eroglu et al., 2001, 2003; Kim et al., 2009; Kim & Lennon, 2008; Yoo et al., 2010); however, the website design of multichannel retailers has not been examined from the perspective of the consistency of online store image with the brand image. This study examines the effect of brand image consistency (especially through the website) on consumer attitude and patronage intentions. The findings of this research will add to the growing body of literature on multi-channel retailing and provide practical information for online retailers in the development of a website for their online business.

난 크리스마스가 싫어!

유정민 샘터사 2000 월간 샘터 Vol.31 No.12