• 한국사회복지학
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• 제62권3호
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• pp.5-29
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• 2010

본 연구는 한국복지패널 1~3차년도 조사 자료를 이용하여 국민기초생활보장제도 수급동태의 특성 및 수급탈출의 결정요인을 분석하였다. 본 연구에서는 수급탈출을 탈출 후 빈곤하지 않은 탈빈곤적 수급탈출과 탈출 후 여전히 빈곤한 탈제도적 수급탈출로 분류하였다. 분석 결과는 다음과 같다. 생명표 분석 결과, 전반적으로 수급탈출확률 수준이 낮고 수급기간이 길어질수록 수급탈출확률이 낮아지는 현상이 관찰된다. 이산시간 해저드 모형의 분석 결과, 연령, 교육수준, 건강상태, 결혼지위, 부양아동 유무, 취업형태 등이 탈빈곤적 수급탈출에 영향을 미치는 것으로 나타났다. 한편 탈제도적 수급탈출에는 수급기간과 수급진입시기를 제외한 모든 변수가 통계적으로 유의한 영향을 미치지 않았다.

• 한국조사연구학회지:조사연구
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• 제12권3호
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• pp.25-48
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• 2011

본 연구에서는 선거 출구조사에서 발생하는 편향을 분석하기 위해, 먼저 2010년 전국동시지방선거 출구조사의 표본설계와 표본추출오차, 그리고 무응답 현황 및 예측오차 등을 살펴보고, 이를 토대로 출구조사에서 체계적으로 발생하는 지역별 편향 문제를 다루었다. 출구조사에서 발생하는 편향을 통계적으로 검증하기 위해 Martin et al.(2005)이 제안한 예측 정확성 척도인 통계량 A를 사용하였다. 2010년 지방선거를 포함해 2006년 지방선거와 2007년 대통령 선거 방송사 출구조사 자료를 토대로 시 도 단위에서 지역별 편향을 분석해 본 결과, 여당 성향이 강한 지역에서는 여당 후보를 과대 추정하는 편향이 체계적으로 발생하고 있으며, 여당 성향이 강해질수록 이런 편향이 더 강해진다는 것을 확인할 수 있었다. 이런 연구결과는 향후 출구조사의 정확성 제고를 위한 방안을 모색하는 데 크게 기여할 수 있을 것으로 기대된다.

• 한국전산유체공학회지
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• 제19권1호
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• pp.73-79
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• 2014

Three-dimensional turbulent flows of a distribution manifold are studied by a turbulence model. To investigate the geometrical effects of the manifold, the length and area of exit port are changed. From the results, flow structures related to the outflow uniformity are examined and the deparure angles are obtained. The exit configuration depending on the departure angle has advantages to the outflow uniformity. That is, the decreased exit area in the streamwise direction improves the uniformity of exit flow. For the uniform effusion, the change of exit port by departure angle is more effective them the change of exit area.

• 교육시설 논문지
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• 제18권5호
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• pp.35-42
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• 2011

This study examined emergency exit location with the most representing school floor type with a mathematical model that applied optimized algorithm in the field of engineering. Recent school buildings became much more diverse in floor planning than the old days. Nevertheless, architect's approach to building prevention against fire related emergency planning still relies on an personal experience and knowledge. Therefore, since school buildings are much more likely to be exposed to any fire related events, emergency exit planning has to be seriously evaluated with a scientific method. The algorithm, which acquires the number of persons in each spatial type(node) and the minimum physical distance between spatial types(arc), can propose the most optimized emergency exit locations. Consequently, this study compared an architect's fire exit planning with the scientific outcome of this study and suggested the most reliable emergency exit locations.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2004년도 추계학술대회 논문집
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• pp.1424-1428
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• 2004

A new design for deburring tools for intersecting holes is introduced. The tool tip is mounted on a slender cantilever assembled into a circular shank. The tool tip has been design to cover ranges of exit angle and diameter ratio between intersecting holes. The design is an improvement over the previous ones by the authors. Experiments have been performed on AL6061. With the new design, mild exit burrs with exit angles greater than 45$^{\circ}$ are successfully removed. For large burrs with smaller exit angles, however, the deburring could be incomplete.

• 한국방재학회 논문집
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• 제5권3호
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• pp.67-72
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• 2005

본 연구는 건축물내의 완전 암흑상태에서 축광유도타일이 피난에 미치는 영향을 측정하기 위하여 조사하였다. 실험조사는 대구 Fire EXPO '05에 실험 장치를 전시하여 엑스포 관람자 520명을 대상으로 2005년 5월 26일부터 29일까지 실시되었다. 실험 조사결과 안전 암흑상태일 때 피난자세는 남자의 경우 70%, 여자는 72%가 벽을 더듬으며 피난한 반면에 축광유도타일이 설치된 경우에는 남자의 경우 88%, 여자의 경우 83%가 선채로 피난을 한 것으로 나타났다. 공공건물의 바닥에 축광유도타일을 설치하면 화재시 정전이 되더라고 평소와 다름없이 피난을 할 수 있는 것으로 나타났다.

• ETRI Journal
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• 제42권5호
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• pp.658-668
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• 2020

In edge computing, most procedures, including data collection, data processing, and service provision, are handled at edge nodes and not in the central cloud. This decreases the processing burden on the central cloud, enabling fast responses to end-device service requests in addition to reducing bandwidth consumption. However, edge nodes have restricted computing, storage, and energy resources to support computation-intensive tasks such as processing deep neural network (DNN) inference. In this study, we analyze the effect of models with single and multiple local exits on DNN inference in an edge-computing environment. Our test results show that a single-exit model performs better with respect to the number of local exited samples, inference accuracy, and inference latency than a multi-exit model at all exit points. These results signify that higher accuracy can be achieved with less computation when a single-exit model is adopted. In edge computing infrastructure, it is therefore more efficient to adopt a DNN model with only one or a few exit points to provide a fast and reliable inference service.

• 한국정밀공학회지
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• 제19권8호
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• pp.55-62
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• 2002

A burr has been defined as undesirable projection of material formed as the result of plastic flow from a cutting or shearing operation. It is unavoidable in all kinds of machining operation. As a result, burr makes troubles on manufacturing process due to deburring cost, quality of products and productivity. In face milling operation, burrs are formed along five edges on the workpiece. In this study, the primary interest is about exit burr The influence of the cutting parameters on the formation of exit burrs in face milling will be described experimentally. Using the results of experimental study, burr types are classified according to appearance and formation mechanism in exit burr. The burr formation mechanism in each type of burr is suggested. Data bases are developed to predict burr formation result.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2003년도 춘계학술대회
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• pp.1742-1747
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• 2003

When a shock wave is discharged from the exit of a duct, complicated flow is formed near the duct exit. The flow field is much more complicated under the ground effects or any other objects near the exit of a duct, such as the circumstance near the exit of the high-speed railway tunnel. The resulting flow is essentially three-dimensional unsteady with the effects of strong compressibility. In the current study, three-dimensional flow fields of the weak shock wave which is discharged from the exit of a duct are numerically investigated using a CFD method. Computations are performed for the weak shock wave in the range below 1.5. The results obtained show that the directivity and magnitude of the weak shock discharged strongly depend upon the Mach number of initial shock wave and are significantly influenced by the ground effects.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2003년도 추계학술대회
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• pp.550-555
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• 2003

When a shock wave arrives at an open end of tube, an impulse wave is discharged from the tube exit and complicated flow is formed near tube exit. The flow field is influenced by the cross-sectional geometry of tube exit, such as circular, square, rectangular, trapezoid and etc. In the current study, three-dimensional propagation characteristics of impulse wave discharged from the tube exit with non-circular cross section are numerically investigated using a CFD method. Total variation diminishing (TVD) scheme is used to solve the three-dimensional, unsteady, compressible Euler equations. Computations are performed for the Mach numbers of the incident shock wave $M_{s}$ below 1.5. The results obtained show that the peak pressure of the impulse wave and propagation directivity depends on the cross-sectional geometry of tube exit and the Mach number of incident shock wave.