• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2003년도 하계학술대회 논문집 Vol.4 No.2
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• pp.818-821
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• 2003

Ozonic use of sterilization and heat treatment of raw material to extend the conservation period of food recently is increased by hard vegetable or microorganism sterilization purpose of fruit. If ozone can create as is easy comparatively because do air or oxygen by raw material and schedule period passes, there is advantage that do not leave the second contaminant because being gotten restored by oxygen. Also, because the effect is big to decolorization beside sterilization effect about microorganism, deodorization, disjointing of venomousness hazardous substance, food save, indoor air purge, good hand processing, hydrospace agricultural chemicals processing etc. the use extent is wide. This research ran parallel a sterilization experiment of E.coli colitis germs by ozone that manufacture ozonizer that use doped diamond maund electrode (BDD) by boron and searched special quality electrochemistry enemy of the ozonizer and is created. E.coli. After cultivate E.coli colitis germs during 37C 1 day is LB ship, after do ozonation, was sterilized more than 90% by ozone as result that examine sterilizing power by substance microscope and could confirm excellency of diamond electrode.

• Journal of Periodontal and Implant Science
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• 제31권3호
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• pp.531-542
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• 2001

Periodontal debridement is most important procedure in periodontal treatment, because periodontal disease is the biofilm infection. The use of ultrasonic instrument has many clinical advantages compared to classical hand instrument. The introduction of newly developed ultrasonic scaler tips made the use of ultrasonic scaler popular. However the study of tooth substance removal according to the working parameters of ultrasonic scaler with newly developed tips is not sufficient. The purpose of this study is to evaluate the effects of working parameters of piezoelectric ultrasonic scaler with curette tip on casting gold removal. The working parameters was standardized by the sledge device which controls lateral force(0.5 N, 1.0 N, 2.0 N) and power setting was adjusted 2, 4, 8 in P mode and S mode and instrumentation time was 5 seconds. The defect depth and width were measured with profile meter and defect surface was examined by SME. The depth of defect was significantly large in S mode( $39.58{\pm}19.35{\mu}m$) compared to P mode( $8.37{\pm}6.98{\mu}m$). There was significant decrease of depth of defect between 1.0N($32.87{\pm}27.18{\mu}m$) and 2.0N( $14.86{\pm}15.04{\mu}m$). The area of defect was also significantly large in S mode($4482.42{\pm}3551.71{\mu}m^2$) compared to P mode( $922.06{\pm}960.32{\mu}m^2$). There was significant decrease of area of defect between 1.0N($3889.12{\pm}3936.00{\mu}m$) and 2.0N( $974.66{\pm}986.01{\mu}m$). The change of mode did not effect on the width of the defect. The change of power setting did not effect on the depth, width, and area of defect. In spite of limitation of this study it could be concluded that the use of piezoelectric ultrasonic scaler with curette tip on S mode could make significant tooth substance loss.

• 한국재난정보학회 논문집
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• 제8권4호
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• pp.384-390
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• 2012

본 연구는 Akers의 사회구조 및 사회학습이론에 근거하여 미국의 아동과 청소년이 거주하는 지역의 사회환경적 특성들이 이들의 알콜, 담배 그리고 마리화나 사용에 어떠한 과정을 거쳐 영향을 미치는 가를 이해하고자 하였다. 미국의 PHDCN 데이터(총 1,791의 아동과 청소년)와 미국의 센서스데이터를 다층적 회귀분석방법을 이용하여 분석한 결과 사회구조 및 사회학습이론의 주장이 부분적으로 지지하는 것으로 나타났다. 그리고 비행친구와의 차별적접촉이 중재역할 뿐만 아니라 조정의 역할도 하고 있는 것으로 나타났다. 그 외 연구의 결과, 형사정책적 함의, 그리고 한계점 등이 논의되었다.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2003년도 추계학술대회 논문집 Vol.16
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• pp.607-610
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• 2003

Ozonic use of sterilization and heat treatment of raw material to extend the conservation period of food recently is increased by hard vegetable or microorganism sterilization purpose of fruit. If ozone can create as is easy comparatively because do air or oxygen by raw material and schedule period passes, there is advantage that do not leave the second contaminant because being gotten restored by oxygen. Also, because the effect is big to decolorization beside disinfection effect about microorganism, deodorization, disjointing of venomousness hazardous substance, food save, Indoor air purge, good hand processing, hydrospace agricultural chemicals processing etc. the use extent is wide. This research ran parallel a sterilization experiment of E.coli colitis germs by ozone that manufacture ozonizer that use doped diamond maund electrode (BDD) by boron and searched special quality electrochemistry enemy of the ozonizer and is created. After cultivate E.coli colitis germs during 37C 1 day is LB ship, after do ozonation, was sterilized more than 90% by ozone as result that examine disinfection effect by substance microscope and could confirm excellency of diamond electrode.

• 대한임상독성학회지
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• 제17권1호
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• pp.14-20
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• 2019

Purpose: This study estimated the incidence of delirium and associated risk factors and outcomes in ICU patients with acute poisoning. Methods: Data were collected from ICU patients over 18 years of age that were admitted via the emergency center after presenting with poisoning from 2010 to 2015. Delirium was assessed retrospectively using the Intensive Care Delirium Screening Checklist (ICDSC). Risk factors were evaluated by univariate and multivariate analysis. Results: A total of 199 patients participated in this study and 68 (34.2%) were diagnosed with delirium based on the ICDSC score. The delirium group showed a significantly higher association with prolonged length of stay in the hospital and ICU in comparison with the non-delirium group. The delirium group was associated with greater use of physical restraint. A statistically greater number of patients with pharmaceutical substance poisoning developed delirium over a short period of time than those with non-pharmaceutical substance poisoning. There was no significant difference between the two groups with respect to age, sex, past history, GCS score, vital signs, application of ventilator care and renal replacement therapy. Conclusion: The finding that the delirium group had a greater length of stay in both the hospital and the ICU is consistent with the results of previous worldwide studies of the effects of delirium on the prognosis of patients who were admitted to the ICU, suggesting the possibility for domestic application. Additionally, use of physical restraint was positively related to the incidence of delirium. Thus, interventions for minimizing the use of physical restraints and considering alternatives are needed.

• 디지털융복합연구
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• 제12권5호
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• pp.491-500
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• 2014

본 연구는 카페인을 도포한 기능성 테이핑 유 무에 따른 고강도 훈련 시 피로물질 향상에 미치는 영향을 알아봄으로써 운동 수행시의 피로 및 경기 수행력 향상을 위한 수단으로서 카페인을 도포한 기능성 테이핑 효과에 대한 기초 자료를 제공하고자 남자 대학생 육상 단거리 선수 10명을 대상으로, 피로물질인 젖산, 혈중젖산탈수소효소(LDH), 무기인산의 3가지 혈중 성분을 분석한 결과 다음과 같은 결론을 얻었다. 첫째, 카페인을 도포한 기능성 테이핑을 적용한 그룹이 고강도 훈련그룹에 비해 젖산은 훈련 직후에 낮은 증가율을 보였다. 둘째, 카페인을 도포한 기능성 테이핑을 적용한 그룹이 고강도 훈련그룹에 비해 혈중젖산탈수소효소(LDH)는 훈련 직후에 낮은 증가율을 보였다. 셋째, 카페인을 도포한 기능성 테이핑을 적용한 그룹이 고강도 훈련그룹에 비해 무기인산은 훈련 직후에 낮은 증가율을 보였다. 이상의 결과와 같이 육상단거리 선수들에게 카페인을 도포한 기능성 테이핑을 적용한 그룹과 고강도훈련이 피로물질인 젖산, 혈중젖산탈수소효소(LDH), 무기인산에 긍정적인 방향으로 변화시킬 수 있는 방법이라는 것을 확인할 수 있었다.

• 정보관리학회지
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• 제39권2호
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• pp.203-232
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• 2022

약물중독 혹은 약물사용장애(substance use disorder)는 세계적으로 그 위험성과 유행성이 지속적으로 관측되고 있다. 이러한 배경에서 수많은 관련 연구들이 진행이 되어왔지만, 이와 관련한 계량서지학적 분석은 미진한 상황이다. 특히, 약물중독과 관련된 다양한 특성들을 종합적으로 반영한 거시적 차원의 계량서지학적 접근법을 활용한 연구는 찾아보기가 힘든 상황이다. 이 연구에서는 이러한 약물중독의 다차원적 특성을 반영하기 위해 사회과학, 자연과학기술, 융복합 분야에서의 약물중독 연구 동향을 비교 분석하였다. 이 연구는 2002년부터 2021년까지의 약물중독 연구 논문을 Web of Science로부터 검색 후 수집하였으며, SCI(E) 및 SSCI 정보를 토대로 학문 분야를 분류하였다. 저자 키워드 동시출현 분석을 수행한 결과, 자연과학기술은 신경정신약물과 보상시스템에 관한 연구가 주를 이루었고, 사회과학 분야에서는 이보다는 인구학적 특성이 반영된 약물중독 연구가 수행되어 왔음을 알 수 있었고, 융복합 분야에서는 이러한 동향을 모두 아우르고 있는 것을 확인할 수 있었다. 저자 동시인용 분석도 수행을 하였는데, 이를 통해 자연과학기술 분야는 슈퍼 저자들이 관측된 반면, 사회과학 분야에서는 개인 저자뿐 아니라 기관 저자까지도 인용이 많이 되는 것으로 확인이 되었다.

• Asian Pacific Journal of Cancer Prevention
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• 제15권22호
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• pp.10033-10038
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• 2014

The aim of this study was to determine the prevalence of tobacco use, beliefs and risk awareness and psychosocial correlates of tobacco use among university students in 24 low, middle and emerging economy countries. Using anonymous questionnaires, data were collected from 16953 undergraduate university students (mean age 20.9, SD=2.9) from 25 universities in 24 countries across Asia, Africa and the Americas. Results indicate that overall 13.3% of the university students were current tobacco users, 22.4% for men and 6.6% for women, ranging from 3.8% in Singapore to 32.5% in Cameroon. The risk awareness of the smoking lung cancer link was 83.6%, while the risk awareness of the smoking heart disease link was 46.5%. Multivariate logistic regression found that older age, male gender, having a wealthy family background, living in a low income country, residing off campus on their own, poor beliefs in the importance not to smoke, awareness of the smoking heart disease link, hit by a sexual partner, depressive symptoms, and substance use (binge drinking and illicit drug use) were associated with current tobacco use.

• 한국학교보건학회지
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• 제34권3호
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• pp.161-169
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• 2021

Purpose: The purpose of the study was to investigate the effect of loneliness on habitual drug use in Korean adolescents. Methods: The study was designed as a cross-sectional study. Using statistics from the 16th (2020) Korea Youth Risk Behavior Web-based Survey, multiple logistic regression analysis was conducted. A total 54,948 adolescents were included in the analysis. Results: Adolescents were more likely to engage in habitual drug use when they were lonely than when they were not (OR: 1.55, 95% CI: 1.20~2.02). As for sociodemographic characteristics, gender, academic achievement, and living with family were factors influencing habitual drug use. As for health behavior characteristics, perceived stress, depression, current drinking, violence, sexual intercourse, and perceived health were identified as factors affecting habitual drug use. Conclusion: Provision of education that includes loneliness as a factor, which was not previously considered important in school education for preventing habitual drug use of adolescents, should be considered.

• 에너지공학
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• 제4권2호
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• pp.297-302
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• 1995

Ignition of a reactive solid in a shape of square corner by a hot surface is studied theoretically. Ignition time and the location of ignition point are determined as a function of dimensionless parameters, with the use of the homogeneous model of ignition. The effect of geometry on the ignition of solid fuel results in the local characteristics: the reaction is initiated in a hot point in depth of the substance. It is shown that ignition time is proportional to the dimensionless initial temperature, whereas for the ignition of the semiinfinite body this dependence was quadratic.