• Journal of Korean Society for Atmospheric Environment
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• 제24권E1호
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• pp.54-62
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• 2008

Microbeam PIXE, often called micro-PIXE, is one of powerful tools for analyzing a wide range of elements for various samples. Moreover, it has important applications of interest to the atmospheric science. In the present study, a qualitative elemental imagination for various atmospheric environmental species was attempted using micro-PIXE. Especially, in combination with a novel individual droplet collection method and the micro-PIXE analytical technique, the chemical specification of various individual atmospheric samples could be carried out. Here, we briefly introduce the results of an application of micro-PIXE to the study of atmospheric environment. The detailed spatial resolution of multiple elements for various samples like individual ambient particles, individual raindrops, individual fog droplets, and individual snow crystals could be successfully achieved by scanning 2.6 MeV $H^+$ micro beam ($1{\sim}2{\mu}m$) accelerated by 3 MeV single-end accelerator.

• 품질경영학회지
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• 제41권2호
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• pp.277-288
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• 2013

Purpose: This study aims to analyze the success factors of information systems and the moderating effect of individual factors in mandatory environment. Methods: In order to test the model, a questionnaire survey is delivered from salespersons of an insurance company in Seoul, Korea. 200 questionnaires are finally analyzed. Structural Equation Modeling (SEM) is adopted to analyze the data and Smart PLS 2.0 is used for examining the moderator effect. Results: The extended model proposed in this paper adopted individual factors and examined their moderator effect among constructs. An empirical test is carried out accordingly in order to test the model proposed in this paper. The results reveal that individual factors (i.e. Computer Self-Efficacy, Anxiety, Personal Innovativeness in IT) have a significant moderating effect on individual performance in the environment of mandatory information system usage. Conclusion: This paper extended the research field of information system success model to information systems in mandatory environment regarding differences of individual factors.

• 대한가정학회지
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• 제48권2호
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• pp.95-111
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• 2010

We examined gender-specific behaviors in children and classified types of bullying behavior among 1,181 fifth and sixth grade elementary schools students. Differences were identified in individual variables, family environment variables, and school environment variables. Furthermore the behavioral tendencies of those variables towards bullying were also investigated. Collected data were subjected to descriptive and comparative statistical analysis using the SPSS program(Ver 15.0). Results showed that tendency towards bullying was gender specific. Bullying behavior, reinforcing behavior, assistant behavior, and onlooking behavior in boys were influenced by individual factors only. However, defending behavior in boys was influenced by individual and school factors, while victimizing behavior was influenced by individual and family factors. In girls, onlooking behavior was only influenced by individual factors, while reinforcing behavior was influenced by individual and family factors. Bullying behavior, defending behavior, assistant behavior, and victimizing behavior in girls were influenced by individual, family, and school factors.

• 한국대기환경학회:학술대회논문집
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• 한국대기환경학회 2005년도 추계학술대회 논문집
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• pp.67-74
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• 2005

Microbeam PIXE, often called micro-PIXE, is a powerful tool tot analyzing a wide range of elements for various samples, as well as, it has important applications of interest to the atmospheric science. In this study, qualitative elemental imagination for various atmospheric environmental species was attempted using micro-PIXE. Here, we present the results of an application of micro-PIXE to the study of atmospheric environment. The detailed spatial resolution of multiple elements lot various samples like individual ambient particles, individual raindrops, individual fog droplets, and individual snow crystals could be successfully achieved by scanning 2.6 MeV H+ micro beam (1-2 ${\mu}m$) accelerated by 3 MV single-end accelerator.

• 한국산학기술학회논문지
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• 제17권2호
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• pp.351-360
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• 2016

본 연구는 서울시를 대상으로 개인의 행복수준에 영향을 미칠 것으로 예상되는 도시환경 특성요소를 추출하고 실제 주민들의 행복수준에 영향을 미치는 요인을 실증적으로 분석함으로써 보다 행복한 도시환경을 조성하기 위한 도시정책과 도시계획 방향을 제시하는데 목적이 있다. 개인의 행복수준에 영향을 미치는 도시환경 요소를 구성하기 위해 도시환경 특성(물리적 환경, 자연적 환경, 사회적 환경) 변수와 개인 특성(개인의 사회 경제적 특성) 변수를 구성하여 분석하였다. 본 연구의 주요 분석결과는 다음과 같다. 첫째, 도시의 물리적 환경이 개인의 행복수준에 미치는 영향을 분석한 결과 인구밀도가 낮고 보행환경만족도가 높을수록 개인의 행복수준이 높아지는 것으로 나타났다. 둘째, 도시의 자연적 환경이 개인의 행복수준에 미치는 영향을 분석한 결과 1인당 공원면적이 넓고 녹지만족도가 높을수록 개인의 행복수준이 높아지는 것으로 나타났다. 셋째, 도시의 사회적 환경이 개인의 행복수준에 미치는 영향을 분석한 결과, 사회적 신뢰가 행복수준에 영향을 미치는 것으로 나타났다.

• 한국환경생태학회지
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• 제29권2호
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• pp.263-278
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• 2015

This study is intended to evaluate the value of functional aspect from the viewpoint of habitat. The indicators that are used in biotope evaluations are various, but most of them use the criteria to evaluate the naturality. This evaluation method cannot appropriately reflect the functional characteristics coming from relation to the surrounding biotope. In this study, the connectivity, cohesion and diversity between individual biotope are quantitatively measured by a landscape index. It is hard to draw the functional value of individual biotopes because the landscape index related to connectivity, cohesion and diversity comes from a landscape having a number of biotopes. The concept of contribution was used to overcome this limitation. The concept of contribution is to quantify how much each individual biotope contributes to the connectivity, cohesion, and diversity in a certain range of landscape by deriving the amount of change in the landscape index according to the presence or absence of each individual biotope. In order to understand the characteristics of evaluation results in functional aspect, this research has done a comparative analysis of the previous research findings in the same target area. According to the result of the research, individual biotopes such as artificial forests, fragmented natural forests, and small planting sites were highly rated.

• 감성과학
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• 제15권4호
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• pp.541-552
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• 2012

본 연구는 귀인이론을 기반으로 사람들이 개인의 경제적 성공과 관련하여 어떠한 귀인양식을 보이는지 고찰하는 실증연구이다. 먼저 귀인이론의 이론적 고찰 및 귀인양식 관련 선행연구 분석에 의한 논거를 토대로 '개인의 경제적 성공 관련 귀인양식 고찰'이라는 연구논제를 정립하였다. 이러한 연구논제를 실증적 방법으로 고찰하기 위해 수도권 지역에 거주하는 성인 238명(연령대/성별 할당표본추출)을 대상으로 설문조사를 실시하였다. 조사결과 개인의 경제적 성공 관련 귀인요인에 대해, 보유자산 10억원 미만 사람들은 태생적 환경조건 72.1%, 노력 18.0%로 나타나고, 보유자산 30억원 이상 사람들은 태생적 환경조건 12.0%, 노력 48.0%로 나타났다. 이러한 귀인양식을 Weiner(1979)가 주장한 귀인이론의 원인지각 측면에서 해석해 보면, 개인의 경제적 성공을 성취하는 원인에 대해 보유자산이 적은 사람은 태생적 환경조건 탓으로 돌리고, 보유자산이 많은 사람은 노력 덕분이라고 믿는 경향을 보인다는 것이다.

• Journal of Korean Society for Atmospheric Environment
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• 제24권E1호
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• pp.44-53
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• 2008

This study was undertaken to measure the properties of individual mineral particles in an artificially saturated atmosphere at a vertical extinct mine with 430 m height. By synchrotron radiation X-ray fluorescence (SR-XRF) microprobe analysis, it was possible to determine the elemental composition of residual insoluble particles on individual cloud droplet replicas formed on the Collodion film. The XRF visualized elemental maps enabled us not only to presume the chemical mixing state of particles retained in cloud droplet, but also to estimate their source. Details about the individual mineral particles captured by artificial cloud droplets should be helpful to understand about the removal characteristics of dust particles such as interaction with clouds. Nearly all individual particles captured in cloud droplets are strongly enriched in Fe. Mass of Fe is ranged between 41 fg and 360 fg with average 112 fg. There is a good agreement between single particle analysis by SR-XRF and bulk particle analysis by PIXE.

• 한국컴퓨터정보학회논문지
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• 제21권1호
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• pp.139-146
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• 2016

In this paper, we analyze the information asymmetry among investors in online trading environment using rumors which are collected in the Korean stock market for the eleven-year period between January 2004 and December 2014. We find that cumulative abnormal return of sample firms is negative and statistically significant, indicating that a significant fall of the stock price starts before the online disclosure, suggesting that the rumors were reflected in the stock price to a significant extent. Furthermore, individual investors show net purchases on firms prior to disclosure while institutional investors show net sales, showing that individual investors trade unfavorably vis-$\grave{a}$-vis institutional investors. This phenomenon is more evident for the KOSDAQ. This result confirms that the information asymmetry exists between individual and institutional investors in online trading environment.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제10권10호
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• pp.4808-4824
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• 2016

Signal individual reconnaissance and identification is an extremely important research topic in non-cooperative domains such as electronic countermeasures and intelligence reconnaissance. Facing the characteristics of the complexity and changeability of current communication environment, how to realize radiation source signal individual identification under the low SNR conditions is an emphasis of research. A novel emitter individual identification method combined bi-spectrum analysis with wavelet feature is presented in this paper. It makes a feature fusion of bi-spectrum slice characteristics and energy variance characteristics of the secondary wavelet transform coefficient to identify MFSK signals under the low SNR (signal-to-noise ratios) environment. Theoretical analyses and computer simulation results show that the proposed algorithm has good recognition performance with the ability to suppress noise and interference, and reaches the recognition rate of more than 90% when the SNR is -6dB.