• 한국학교보건학회지
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• 제34권1호
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• pp.62-75
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• 2021

Purpose: Smoking among adolescents is a critical healthcare concern that needs to be tackled with respect to not only intrapersonal and interpersonal factors but also socio-cultural factors. This study was to identify the smoking behaviors and amount of tobacco consumption among adolescents, and to investigate the factors associated with the behaviors and amount. Methods: A cross-sectional study was conducted based on the theory of triadic influence using a nationally representative secondary data set, the 2018 Korea Youth Risk Behavior Survey (N=60,040). The analysis was performed by dividing smoking behaviors into lifetime, current, and daily smoking, and smoking amount into light, moderate, and heavy smoking. Descriptive statistics and multinomial logistic regression analyses were conducted. Results: Overall, 8.2%, 3.2% and 3.4% of the adolescents were involved in lifetime, current, and daily smoking, respectively. In addition, 5.3%, 0.8%, and 0.6% of the adolescents were involved in light, moderate, and heavy smoking, respectively. The factor associated with smoking behaviors and the amount of tobacco consumed were gender, academic achievement, depression, living with family, close friend's smoking, violent victimization, household economic status, and school level (all ps<.05). Conclusion: A considerable number of adolescents are engaged in risky smoking behaviors and consume large amounts of tobacco. Adolescents who said yes to peer smoking, violent victimization, not living with their family, and depressive emotions were more likely to engage in risky smoking behaviors and consume large amounts of tobacco. Tailored interventions to decrease smoking should be planed and provided, while considering the school and home environment and individual needs of adolescents.

• 한국노년학
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• 제28권4호
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• pp.1165-1178
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• 2008

본 연구는 노인학대의 새로운 유형화를 통해 노인학대의 중복적 특성을 간명화하여 노인학대에 대한 이해를 돕고, 노인학대의 유형별 결정요인 분석을 목적으로 한다. 이를 위해 전국노인보호전문기관의 81명의 상담가가 조사일자를 기점으로 최근 종결한 5개 사례에 대해서 주어진 노인학대 판정지표 및 사정도구에 회고적으로 응답하는 설문조사방법을 활용하였으며, 조사결과 350명의 노인학대 사례에 대해 통계분석을 실시하였다. 분석방법은 17개의 노인학대 판정지표를 활용한 군집분석을 통해 노인학대를 유형화하고, 유형화결과에 따라 logit-regression을 활용하여 유형결정요인을 분석하였다. 연구결과 노인학대는 '폭력성 노인학대'와 '회피성 노인학대'로 유형화되었다. 폭력성 노인학대는 직접적으로 폭력을 행하거나, 거친행위로 노인을 위협하거나 협박하는 행위, 노인을 무시하는 언어적 표현과 행동과 같이 직접적으로 노인에게 해를 가하는 언행이 나타나는 유형이며, 회피성 노인학대는 방임, 유기, 자기방임과 노인과의 접촉을 기피하는 유형으로 구분되었다. 폭력성 노인학대와 회피성 노인학대의 유형 결정요인 분석결과, 피학대노인의 기능상태와 학력, 가해자의 성별과 학력, 가해자가 느끼는 피해자에 대한 수발부담, 가해자와 피해자의 동거여부가 노인학대 유형 결정에 유의미한 영향을 미치는 것으로 나타났다. 피해노인의 학력이 높을수록 폭력성 노인학대 발생율이 높으며, 기능상태(IADL)가 나쁠수록 회피성 노인학대 발생율이 높게 나타났다. 또한 가해자가 여성일수록 회피성 노인학대 발생율이 높으며, 가해자의 학력이 높을수록 폭력성 학대 발생율이 높게 나타났다. 가해자가 노인의 수발부담이 높다고 느낄수록 폭력성 노인학대가 높게 나타났으며, 동거는 회피성 노인학대보다는 폭력성 노인학대의 발생율을 높이는 것으로 나타났다. 본 연구는 노인학대의 복잡성을 간명하게 이해할 수 있도록 하는 새로운 노인학대의 유형화를 시도하였으며, 노인학대의 유형 결정요인을 밝힘으로써 추후 노인학대 개입기법을 세분화하고 노인학대 발생원인 이론개발의 기초자료로서의 의미를 갖는다.

• 대한조선학회논문집
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• 제48권6호
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• pp.581-591
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• 2011

This paper describes the air compressibility effect in the CFD simulation of water impact load prediction. In order to consider the air compressibility effect, two sets of governing equations are employed, namely the incompressible Navier-stokes equations and compressible Navier-Stokes equations that describe general compressible gas flow. In order to describe violent motion of free surface, volume-of-fluid method is utilized. The role of air compressibility is presented by the comparative study of water impact load obtained from two different air models, i.e. the compressible and incompressible air. For both cases, water is considered as incompressible media. Compressible air model shows oscillatory behavior of pressure on the solid surface that may attribute to the air-cushion effect. Incompressible air model showed no such oscillatory behavior in the pressure history. This study also showed that the CFD simulation can capture the formation of air pockets enclosed by water and solid surface, which may be the location where the air compressibility effect is dominant.

• 한국화재조사학회지
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• 제8권1호
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• pp.25-39
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• 2006

최근에 급격한 증가추세를 보이고 있는 방화 범죄는 다른 강력범죄에 비해 증가 속도가 현저히 빠르다. 그에 반해 사회적 관심도는 아직 미미하며, 방화범죄의 조사에 있어 과학적 전문적 접근이 부족한 것이 실정이다. 이러한 문제는 방화범죄의 체포율이 다른 범죄에 비해 낮은 것에 일조 한다. 이제는 방화현장의 단순한 조사에서 그치는 것이 아닌 과학화 전문화를 통해 방화범의 행동을 유추하여, 방화현장에서 관찰되는 특이점을 토대로 범인을 추정하고, 범행당시의 심리상태 등을 유추한 것을 검거 후 면담을 통해 밝혀진 내용들을 분석하고자 한다.

• Geomechanics and Engineering
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• 제25권2호
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• pp.111-121
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• 2021

Large deformation and rapid pressure propagation take place inside the rock mass under the dynamic loads caused by the explosives, on quarry faces in order to extract aggregate material. The complexity of the science of rock blasting is due to a number of factors that affect the phenomenon. However, blasting engineering computations could be facilitated by innovative software algorithms in order to determine the results of the violent explosion, since field experiments are particularly difficult to be conducted. The present research focuses on the design of a Finite Element Analysis (FEA) code, for investigating in detail the behavior of limestone under the blasting effect of Ammonium Nitrate & Fuel Oil (ANFO). Specifically, the manuscript presents the FEA models and the relevant transient analysis results, simulating the blasting process for three types of limestone, ranging from poor to very good quality. The Finite Element code was developed by applying the Jones-Wilkins-Lee (JWL) equation of state to describe the thermodynamic state of ANFO and the pressure dependent Drucker-Prager failure criterion to define the limestone plasticity behavior, under blasting induced, high rate stress. A progressive damage model was also used in order to define the stiffness degradation and destruction of the material. This paper performs a comparative analysis and quantifies the phenomena regarding pressure, stress distribution and energy balance, for three types of limestone. The ultimate goal of this research is to provide an answer for a number of scientific questions, considering various phenomena taking place during the explosion event, using advanced computational tools.

• International Journal of Naval Architecture and Ocean Engineering
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• 제9권4호
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• pp.404-417
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• 2017

The present study numerically analyzed the dynamic behavior of 3D framed structures subject to impulsive slamming forces by violent breaking waves. The structures were modeled using multiple lumped masses for the vertical projections of each member, and the slamming forces from the breaking waves were concentrated on these lumped masses. A numerical algorithm was developed to properly incorporate the slamming forces into a dynamic analysis to numerically determine the structural responses. Then, the validity of the numerical analysis was verified using the results of an existing hydraulic experiment. The numerical and experimental results for various model structures were generally in good agreement. The uncertainties concerning the properties of the breaking waves used in the verification are also discussed here.

• 대한치과마취과학회지
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• 제9권1호
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• pp.30-35
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• 2009

Intravenous midazolam has been frequently used for the relief of anxiety in dental treatment. This is likely the result of the sedative and anterograde amnestic properties of midazolam that are mediated through $\gamma$-Aminobutyric acid agonism. Unfortunately, Paradoxical reactions to midazolam include agitation, talkativeness, confusion, disinhibition, aggression,violent behavior, act of self-injury and need for restraints. These occur in less than 1% of all patients receiving midazolam, may occur at variable times after administration and are difficult to predict and diagnose. Two women with severe anxiety for dental treatment experienced paradoxical reactions associated with the use of intravenous midazolam. We are reviewed the management and prevention of paradoxical reactions and its different etiology.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• 제19권2호
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• pp.89-103
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• 2008

Although the scientific evidence is not entirely supportive, atypical antipsychotics have been used widely for the treatment of children and adolescents with mental illnesses as alternatives to typical antipsychotics which have more serious unwanted adverse effects than atypical neuroleptics. On the basis of clinical experiences and research data, atypical antipsychotics have been prescribed for adolescents with schizophrenia, manic or mixed episodes of bipolar disorders, tic disorders, aberrant behaviors in pervasive developmental disorders, and impulsive or violent behaviors in disruptive behavior disorders. Due to their efficacy and relatively more tolerable side effects, the use of atypical antipsychotics has become increasingly popular in child and adolescent psychiatry. However, we should pay attention to the limitations associated with short-term clinical experiences and the lack of well-designed controlled studies, especially in terms of adverse effects including those involving metabolic processes.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 2011년도 정기 학술대회
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• pp.539-543
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• 2011

LNG cargo containment system (CCS) has the primary function of ensuring adequate thermal insulation with keeping natural gas below its boiling point. From the viewpoint of structural design, this LNG CCS can be treated as a laminated composite structure showing complex structural responses under the sloshing load which can be defined as a violent behavior of the liquid contents in cargo tanks due to external forced motions. As LNG CCS type, Mark III containment system from TGZ is considered in this paper and then its structural strength assessment is performed based on a simple higher-order shear deformation theory and maximum stress, maximum strain, Tsai-Wu failure criteria developed for laminated composite plates. The assessment is performed to the initial failure of the Mark III CS plate by investigating failure locations and loads.

• 천문학회보
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• 제41권1호
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• pp.39.2-39.2
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• 2016

The central regions of barred-spiral galaxies contain interesting gaseous structures such as dust lanes located at the leading side of the bar and nuclear rings that are sites of intense star formation. Our previous studies showed how gas structures form under the influence of a non-axisymmetric bar potential and temporal/spatial behavior of the star formation in nuclear rings. However, previous works were limited to 2-dimensional infinitesimally-thin, unmagnetized and isothermal disks. To study effects of cooling/heating, vertical motions of gas structures and magnetic field, we use Mesh-Free magneto-hydrodynamic simulation code GIZMO. We find that temporal variations of the star formation rates in the nuclear ring in the three-dimensional model are overall similar those in the previous two-dimensional results, although the former shows more violent small-scale fluctuations near the early primary peak. We will present our recent results about evolution of gaseous structures and star formation rate compare with results of previous studies.