• 한국전기전자재료학회:학술대회논문집
• /
• 한국전기전자재료학회 2010년도 하계학술대회 논문집
• /
• pp.271-271
• /
• 2010

$BaTiO_3$(BT) has high permittivity so that has been applied to dielectric and insulator materials in 3D system-level package integration. In order to achieve excellent performance of device, the BT layer should be highly dense. In this study, BT thick films were prepared by the inkjet printing method. And these films were cured at $280^{\circ}C$ after infiltration of polymer resin. As a result, we have successfully fabricated not only the inkjet-printed hybrid BT film but also metal-insulator-metal(MIM) capacitor without sintering process. Changes in the dielectric constant of BT hybrid film with particle size and packing density were investigated. The dielectric constant was increased with increasing packing density and particle size. Further, the BT hybrid film using two different size particles had even higher packing density and dielectric constant.

• 지적과 국토정보
• /
• 제52권2호
• /
• pp.121-135
• /
• 2022

본 연구의 목적은 공간정보기업의 거래정보를 토대로 공간정보산업의 융·복합부문 탐색과 표면상무관회귀모형을 이용한 동 산업의 시장규모 전망이다. 공간정보산업조사 통계에서 확인할 수 없는 공간정보 융·복합부문은 한국기업데이터의 사업체DB(2010~2019년)를 이용하여 공간정보 관련 핵심키워드를 검색하여 상품별 구매 및 판매데이터를 확보하여 분석하였다. 공간정보사업체의 융·복합은 서울 특정구와 일부 경기도권역과의 가치사슬 간 거래관계에서 나타났다. 해당 융·복합 사업체는 가치사슬 2(활용·서비스)&3(융·복합)단계의 매출액이 가장 크고, 가치사슬 1(생산·구축)&2단계와 2&3단계의 융·복합은 2010년 대비 2019년 매출은 약 2배 가량 상승하였다. 2019년 통계청 기준 공간정보산업의 총매출액은 약 8조원으로 발표되었으나, 본 연구에서는 공간정보산업의 총매출액은 23~27조원, 융·복합 활동을 고려할 때 28~47조원으로 추정되었다. 마지막으로 공간정보산업 미래 시장규모예측을 위하여 표면상무관회귀(SUR: Seemingly Unrelated Regression)모형을 이용하여 2025년 및 2030년에 시나리오 1(인구증가율 0.38%, 2020~2024년), 0.07%(2026~2030년)을 적용할 경우, 공간정보산업 매출액은 -0.37% ~ 0.069% 감소하였다. 동 기간 시나리오 2(평균임금상승률 1.2%)를 적용하면 공간정보산업 매출액은 2.326% ~ 12.185% 증가하였다. 즉, 공간정보산업의 매출액은 노동, 총요소 생산성 및 자본 생산성의 함수이며, 특히 노동생산성과 연구개발 등의 총요소생산성을 제고하는 방향의 정책개발과 대안 수립 연구가 추가적으로 필요하다.

• Animal Systematics, Evolution and Diversity
• /
• 제29권1호
• /
• pp.31-35
• /
• 2013

Two sponges, Stelletta subtilis (Sollas, 1886) and Stryphnus sollasi n. sp., were collected from depth of 24-30 m at Jeju-do Island and Chuja-do Island by SCUBA diving from July 2003 to June 2010. The new species Stryphnus sollasi n. sp is similar with Stryphnus niger Sollas, 1886 in the composition of spicules, however they differ in colour and spicule size. This new species has smaller oxeas and larger oxyasters than those of S. niger. This new species has two size categories of oxyaster but S. niger has one size category of oxyaster. The colour of S. sollasi n. sp is white, but the latter puce black. Stelletta subtilis (Sollas, 1886) is first recorded in Korean fauna.

• 한국멀티미디어학회논문지
• /
• 제13권6호
• /
• pp.817-824
• /
• 2010

Linear Discriminant Analysis (LDA) has been successfully applied for dimension reduction in face recognition. However, LDA requires the transformation of a face image to a one-dimensional vector and this process can cause the correlation information among neighboring pixels to be disregarded. On the other hand, 2D-LDA uses 2D images directly without a transformation process and it has been shown to be superior to the traditional LDA. Nevertheless, there are some problems in 2D-LDA. First, it is difficult to determine the optimal number of feature vectors in a reduced dimensional space. Second, the size of rectangular windows used in 2D-LDA makes strong impacts on classification accuracies but there is no reliable way to determine an optimal window size. In this paper, we propose a new algorithm to overcome those problems in 2D-LDA. We adopt an ensemble approach which combines several classifiers obtained by utilizing various window sizes. And a practical method to determine the number of feature vectors is also presented. Experimental results demonstrate that the proposed method can overcome the difficulties with choosing an optimal window size and the number of feature vectors.

• 로봇학회논문지
• /
• 제5권4호
• /
• pp.318-325
• /
• 2010

This paper proposes a new string controller for puppet which is optimized in terms of the number of motors and its size. To optimize the number of motors needed for generating the essential motions of puppet, the motion of bending a leg is implemented by one string and the walking motion by two legs is implemented by one motor. To minimize the space needed for the controller when generating the essential motions of puppet, cylindrical and articulated joints are used in the controller. The proposed controller is actually implemented to perform various puppet shows and it has been proved that the size of the controller is small enough for two puppets to stand close to shake hands and it is fast enough to simulate fast dance motions.

• 로봇학회논문지
• /
• 제5권2호
• /
• pp.85-92
• /
• 2010

In this paper, we propose a digital image stabilization technique using edge detection and Lucas-Kanade optical flow in order to minimize the motion of the shaken image. The accuracy of motion estimation based on block matching technique depends on the size of search window, which results in long calculation time. Therefore it is not applicable to real-time system. In addition, since the size of vector depends on that of block, it is difficult to estimate the motion which is bigger than the block size. The proposed method extracts the trust region using edge detection, to estimate the motion of some critical points in trust region based on Lucas-Kanade optical flow algorithm. The experimental results show that the proposed method stabilizes the shaking of motion image effectively in real time.

• Communications for Statistical Applications and Methods
• /
• 제17권5호
• /
• pp.689-696
• /
• 2010

구간중도 절단자료는 감염 자료, 종양 발생 자료등 그 발생 시간을 정확하게 관측할 수 없는 경우에 흔히 발생되는 자료로 정확한 사건 발생 시간대신에 발생 전 마지막 관측시점과 발생 후 첫 번째 관측시점으로 구성된다. 이러한 종류의 자료는 Sun (2006)에 의해 자세하게 논의되었으며 관측 개체간의 독립성 가정 하에서 여러 가지 방법들에 의해 분석되어져 왔다. 본 논문에서는 관측 개체들이 군집으로부터 발생하여 더 이상독립성 가정이 적절하지 못한 경우를 고려한다. 특히 반응변수인 사건 발생 시간이 군집의 크기와 연관되어 있을 때, 이를 고려하기 위한 결합 모형을 제시한다. 제안된 모형은 림프계 필라리아병의 실제 자료에 적용한다.

• 한국의류학회지
• /
• 제34권3호
• /
• pp.437-447
• /
• 2010

This study compares by gender the preference about ideal female height and body parts. Data was collected through a survey of 203 males and 236 females. The results are as follows: Males and females prefer 161~165cm as the ideal female height and 176~180cm as the ideal male height. In regards to the ideal height difference between couples, both males and females prefer males to be taller, with the head of the female at the same height as the neck of the male. Males and females prefer the shorter height than the ideal height of a fashion model and Miss Korea who got the prize from the korean beauty contest. In the case of Miss Korea, there has been a demand for tall women to participate in world beauty contests. However, this study shows that young people prefer a shorter height than the society expects. Males and females think the shoulder width is ideal when it is 2 times wider than the width of a face in regards to the preference of the ideal female body parts. There is a difference between males and females in the ideal breast size. Males prefer C-cup size while females prefer B-cup size. The ideal size of waist preferred is between 60~65cm to both males and females. The ideal shape of legs preferred to both males and females is a slightly muscular shape.

• 한국산학기술학회논문지
• /
• 제11권12호
• /
• pp.5113-5119
• /
• 2010

인체측정학(Anthropometry)은 자동차, 가전제품, 의료기기 및 스포츠 용품 등 다양한 분야에서 소비자의 만족도와 사용 효율성을 최적화하기 위해 조사되고 연구되어 왔다. 하지만 아직까지 인체 측정 방식은 계측자를 이용한 직접측정 또는 스캐너나 디지털 측정기 등 고가의 장치에 의존적인 방법에서 벗어나지 못하고 있다. 따라서 본 연구는 사진으로부터 신체인식 알고리즘을 이용하여 신체사이즈를 자동으로 추출하고, 의류추천 및 자전거 피팅사이즈 서비스 등에 활용가능성을 제시한다. 이를 위해 Haar-like features와 AdaBoost 알고리즘을 이용하여 빠른 속도와 높은 정확도로 영상콘텐츠 내에서 신체 영역을 검출한다. 이후 AAM(Active Appearance Model)을 이용하여 특징점을 검출하고 도출된 측정치에 최적화된 상품을 추천하는 지능형 모듈 시스템을 구현하고 성능평가를 제시한다.

• Journal of Preventive Medicine and Public Health
• /
• 제43권6호
• /
• pp.543-548
• /
• 2010

Objectives: The objective of this study was to calculate sample size and power in an ongoing cohort, Korea radiation effect and epidemiology cohort (KREEC). Method: Sample size calculation was performed using PASS 2002 based on Cox regression and Poisson regression models. Person-year was calculated by using data from '1993-1997 Total cancer incidence by sex and age, Seoul' and Korean statistical informative service. Results: With the assumption of relative risk=1.3, exposure:non-exposure=1:2 and power=0.8, sample size calculation was 405 events based on a Cox regression model. When the relative risk was assumed to be 1.5 then number of events was 170. Based on a Poisson regression model, relative risk=1.3, exposure:non-exposure=1:2 and power=0.8 rendered 385 events. Relative risk of 1.5 resulted in a total of 157 events. We calculated person-years (PY) with event numbers and cancer incidence rate in the nonexposure group. Based on a Cox regression model, with relative risk=1.3, exposure:non-exposure=1:2 and power=0.8, 136 245PY was needed to secure the power. In a Poisson regression model, with relative risk=1.3, exposure:non-exposure=1:2 and power=0.8, person-year needed was 129517PY. A total of 1939 cases were identified in KREEC until December 2007. Conclusions: A retrospective power calculation in an ongoing study might be biased by the data. Prospective power calculation should be carried out based on various assumptions prior to the study.