• 인터넷정보학회논문지
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• 제17권2호
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• pp.87-95
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• 2016

본 연구는 선거캠페인 도구로써의 SNS 역할을 살펴보고자 2015년 4 29 재 보궐 선거 기간 동안의 정동영 후보와 변희재 후보의 SNS 상 메시지에 대한 내용 분석을 실시하였다. 본 연구의 결과로 첫째, 두 후보자의 SNS에 나타난 메시지의 내용적 측면을 분석한 결과 두 후보자 모두 '단순홍보'와 관련된 메시지를 가장 적극적으로 사용한 것으로 나타났다. 둘째, SNS상에 나타난 메시지의 목적을 베노이트(1999)가 제안한 설득적 전략방법에 따라 분석한 결과 두 후보자 모두'주장'의 전략을 가장 두드러지게 사용한 것으로 드러났다. 셋째, SNS상 메시지의 논제를 분석한 결과, 정동영 후보는 '인간적 특성'을, 변희재 후보는 '정책'에 관한 언급이 더 많은 것으로 나타났다.

• 디지털융복합연구
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• 제10권7호
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• pp.69-75
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• 2012

본 연구는 2010년 6.2 지방선거공보물 분석을 통해 후보자의 메시지 표현전략흐름을 살펴보고 변화된 유권자의식과 시대적 환경에 맞는 선거공보물물의 개선방향을 제시하고자 했다. 따라서 선 선거공보물의 표현전략은 친근하고 흥미롭게, 누구나 쉽게 이해하고 간결하게 표현하고자 했다. 표현전략의 서술은 3인층으로 이성적 서술과 긍정적 소구방법이 많았다. 이는 공격적이고 부정적인 표현이 역효과를 가져온다는 점을 의식하고 있다. 표지 슬로건의 주 소구점은 인물, 지역발전, 복지 순으로 공약은 10개 이내가 많았다. 심볼은 후보자의 소속 정당심볼을 많이 사용했다. 내용은 후보자 이름과 경험, 경영과 정치력, 지역사람임을 많이 강조했다. 또한 주민 등장의 비율을 높여 서민적이고 친근함을 나타내고자 했다.

• 한국정보통신학회논문지
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• 제17권12호
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• pp.2812-2817
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• 2013

본 논문에서는 간섭 환경을 고려하여 디코딩 후 전달 중계 시스템에서 최적의 중계 노드 선택 기법에 대한 아웃티지 확률을 레일레이 페이딩 채널을 가정하여 분석한다. 그리고, 아웃티지 성능 결과를 토대로 최적의 중계 노드 선택을 위하여 이용되는 중계 노드 후보들의 유효한 집합을 결정하는 방법을 제안한다. 여기서, 중계 노드 후보들의 유효한 집합은 시스템에서 중계 노드 선택을 위하여 주어진 중계 노드들 중 성능 개선에 기여하지 못하는 중계 노드들을 제외한 집합을 의미한다. 중계 노드 후보들의 유효한 집합 결정은 성능의 저하를 최소화하면서 채널 정보의 피드백오버헤드를 절감시키고 중계 노드들의 불필요한 에너지 낭비를 방지할 수 있다. 본 논문에서는 중계 노드 후보들의 유효한 집합 결정에 영향을 주는 중요한 변수를 제공한다.

• 한국산업보건학회지
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• 제32권3호
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• pp.253-267
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• 2022

Objectives: This study was performed to check whether the CRS (Chemical Ranking and Scoring) system is appropriate as a method to determine substances as candidates for substances subject to permission and to apply this system to the selection of candidates for substances subject to permission. Methods: A risk score was obtained by multiplying the hazard score and the exposure score and then ranking them. The hazard sub-indicators are carcinogenicity, germ cell mutagenicity, reproductive toxicity, specific target organ toxicity-repeated exposure, respiratory sensitization and endocrine disrupting chemicals. Exposure sub-indicators are persistence, bioaccumulation and emission volume. Sensitivity analysis was performed for missing values. Correlation analysis and multivariable linear regression analysis were performed among hazard, exposure and risk in order to confirm that CRS was an appropriate method. Results: As a result of the sensitivity analysis on missing values, it was confirmed that the effect on the risk ranking was not sensitive. Correlation and regression analysis confirmed that exposure had a greater effect on risk than hazard. Conclusions: The CRS system, which derives a risk score using a hazard and exposure score, is judged to be appropriate as a method for the selection of preliminary of candidates for substances subject to permission. Benzene, cadmium, nickel, and cobalt were selected as priority candidates for substances subject to permission.

• 천문학회보
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• 제40권1호
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• pp.42.2-42.2
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• 2015

High frequency peakers (HFPs) are promising candidates for young active galactic nuclei (AGNs). Their small physical scale (< 1 kpc) and radio spectrum peaked at high frequency (> 5 GHz) are suggestive that it has been only about $10^2-10^3$ years since a central massive black hole in their host galaxies was launched. Until recently however, long-term monitoring radio observations at frequencies which are high enough to cover the true peak of HFP candidates were rare. Therefore, previous HFP samples are often contaminated by blazars, which are highly variable, hence may show a similar radio spectrum as HFPs depending on the observational epoch. In this work, we challenge to identify genuine young AGNs by monitoring HFP candidates at high radio frequencies. We performed single-dish monitoring of 19 candidates in 18 epochs over 2.5 years at 22 and 43 GHz using the Korean VLBI Network (KVN). Also, using KaVA, a combined array of the KVN and the VERA in Japan, we carried out 22 GHz VLBI observations of two HFPs and one blazar selected from our sample in order to compare their parsec scale (milli-arcsecond scale) morphology. HFPs are expected to have double/triple features, so called compact symmetric objects, which are scaled-down versions of extended radio galaxies, while blazars typically show core-jet morphology. We discuss the properties of AGNs at their very early evolutionary stage based on the results of the KVN and KaVA observations.

• 천문학회보
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• 제40권1호
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• pp.79.3-80
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• 2015

Galaxy overdensities such as galaxy clusters and superclusters are the largest gravitationally bound systems in the Universe. Since they contain many different levels of local densities, they are excellent places to test galaxy evolution models in connection to the environments. The environment studies of galaxies at z ~ 1 are important because the environmental quenching seems to be an important mechanism to reduce star formation activities in galaxies at z < 1. However, there have been not many studies about high redshift galaxy clusters at z ~ 1 because of the lack of wide and deep multi-wavelength data. We have used the multi-wavelength data from the UKIDSS DXS (J and K band), the SWIRE (4 IRAC bands), and the PAN-STARRS (g, r, i, z, y bands) in the ELAIS-N1 field. We identified galaxy cluster candidates at 0.2 < z < 1.6 using the multi-wavelength data. We found several superclusters where cluster candidates are concentrated on few tens of Mpc scale. Interestingly, some of the supercluster candidates consist of galaxy clusters which have high blue galaxy. We will present high redshift galaxy cluster and supercluster candidates in ELAIS-N1 field and galaxy properties in different environments including dense clusters and fields.

• 디지털융복합연구
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• 제10권2호
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• pp.161-169
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• 2012

선거 시스템을 관리하기 위해서는 많은 비용과 인력이 요구된다. 경제적이고 공정한 선거 시스템 구축을 위해서 전자 투표 기법의 접목은 필수적이다. 특히 스마트폰과 무선 인터넷 사용이 급증하면서 장소에 구애받지 않고 투표할 수 있는 모바일 투표에 대한 관심이 증대하고 있다. 본 논문에서는 후보자들에 의해서 선거의 공정성이 보장되는 모바일 투표 기법을 제안한다. 모바일 전자 투표를 위한 요구사항을 분석하고 법적 구속력이 있는 모바일 ID와 PKI 기반의 서명 키를 생성한다. 제안한 기법에서 투표권은 부인봉쇄 다중서명 기법을 적용하여 후보자들에 의해서 서명된다. 서명된 투표권은 개표 단계에서 모든 후보자들의 동의 없이는 검증할 수 없는 특성을 갖는다.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2001년도 하계종합학술대회 논문집(4)
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• pp.21-24
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• 2001

In this paper, we present a fast face detection algorithm by estimating the eye region using neural network. To implement a real time face detection system, it is necessary to reduce search space. We limit the search space just to a few pairs of eye candidates. For the selection of them, we first isolate possible eye regions in the fast and robust way by modified histogram equalization. The eye candidates are paired to form an eye pair and each of the eye pair is estimated how close it is to a true eye pair in two aspects : One is how similar the two eye candidates are in shape and the other is how close each of them is to a true eye image A multi-layer perceptron neural network is used to find the eye candidate region's closeness to the true eye image. Just a few best candidates are then verified by eigenfaces. The experimental results show that this approach is fast and reliable. We achieved 94% detection rate with average 0.1 sec Processing time in Pentium III PC in the experiment on 424 gray scale images from MIT, Yale, and Yonsei databases.

• 한국수학교육학회지시리즈D:수학교육연구
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• 제9권4호
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• pp.317-328
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• 2005

The aim of this study is to investigate future teachers' skills that can make problem solving methods concrete for 7-11 year old students. For the students in the concrete operations level, solutions of word problems should also be taught by concreting. But most of teacher candidates can not solve the problems without algebra because they got used to solve the word problems with algebra during their high school and university education. In this study, whether the teacher candidates have the skills of solving the primary school level problems without using algebra or not are being observed. At the end of this observation it is determinated that primary level teacher candidates generally prefer using algebra operations because of their former habits. The results show that in the education of the primary level teacher candidates, there is the need of developing the solving skills using figures and diagrams without algebra rather than algebraic solutions in word problems.

• 한국항공운항학회지
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• 제18권1호
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• pp.83-88
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• 2010

The study is intended to help to select the pilot candidates with exceptional flight aptitude ability and to investigate the relationship between the results of the scholastic aptitude test and the flight aptitude. It is intended that the research will help to draw recommendations on the relevant fields of the scholastic aptitude test that is to be used to select the high caliber candidates with exceptional flight aptitude ability, to gauge the resulting effectiveness of its application and helping to revise the university's syllabus accordingly. From the study, korean, mathematics, english grade and the flight aptitude test results have all shown to hold mutual relationship and through simple correlation analysis, it was discovered that mathematics and English are the two factors that affect the results of the flight aptitude test, with the extent of its impact graded in descending order of English, mathematics and Korean. Lastly, the logistic regression analysis have discovered that the mathematics grade has significant effect on the classification of the flight aptitude and non aptitude category groups, and English also has significant influence close to the 0.05 p-values. It is believed that should the findings of this study be considered as part of the selection process of the university applicants of the department of aeronautical science, making discovery of candidates of higher quality is expected.