• 경영과정보연구
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• 제30권3호
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• pp.153-167
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• 2011

본 연구는 소셜네트워크의 구조적 특성인 연결밀도와 중심성에 따라 소셜쇼핑에 대한 구매의도의 차이를 검증하고자 실시하였다. 이와 함께 집단중심의 온라인 커뮤니티와 개인중심의 SNS(소셜네트워크서비스)간의 소셜쇼핑 구매의도의 차이를 제안하고 분석하였으며, 그 이유를 구체적으로 살펴보기 위해 구조적 특성을 반영한 가설을 설정하고 분석하였다. 분석결과, 연결밀도가 높은 경우에 소셜쇼핑에 대한 구매의도가 높게 나타났으며 중심성 역시 높을 때 구매의도가 높은 것으로 나타났다. 또한 온라인 커뮤니티와 SNS간에도 소셜쇼핑에 대한 구매의도가 차이를 보였는데, 온라인 커뮤니티에서는 연결밀도가 높은 경우에, SNS는 중심성이 높은 경우에 각각 구매의도에 중요한 영향을 미치고 있음을 발견하였다. 이러한 결과를 토대로 소셜네트워크 및 소셜쇼핑 연구에 있어 네트워크 구조의 중요성에 대한 시사점을 제시하고 소셜쇼핑의 구매의도를 높이기 위해 소셜네트워크 유형별 구조를 이해한 전략 수립의 중요성과 방향에 대한 시사점을 제안하였다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2007년도 추계학술대회 논문집
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• pp.462-467
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• 2007

From the research which it sees verification of the whole interpretation and local interpretation of the durability steel deck bridge a static test and it produces the test body which it sells with character and it executes smallness pul lek detailed interpretation it leads and the appropriate characteristic of smallness pul lek detailed interpretation and to sleep a nominal stress price and it compares it judges it does. The stress quality from each structure region which it follows in load stock location it analyzes and from the hazard which evaluates, the objective region the length rib and the bottom grater weld zone, the length rib and width rib connection department and the width rib with the father it divided. It investigated the stress distribution of the test body from these objective location, FEM interpretation it led and the conduct against each structure state tax it analyzed. General conduct the load stock location the floor plate is located in the center with interpretation price together symmetry characteristic to seem, it cannot be like that it cannot there is one actual test price. Like this reason the length rib and width rib connection actually production even production characteristic security it is a day when it is impossible with the curvature junction department which it blows, it follows in examination body deferment condition and form feed with the fact that it is visible a big difference even with error of some it becomes. Consequently for a data and the research which are more accurate it is judged with the fact that the effort which is prudent will be necessary.

• 한국통신학회논문지
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• 제29권12B호
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• pp.1042-1051
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• 2004

IEEE1394는 멀티미디어 흠 네트워크 환경에서 사용되는 대표적인 네트워크 프로토콜로서 비동기 전송과 등시성 전송을 통한 멀티미디어 서비스를 제공한다. 하지만 다수의 A/V 디바이스가 IEEE1394 네트워크에 참여하여 멀티미디어 데이터 전송을 하게 되면 등시성 자원의 독점과 등시성 연결의 중복이 발생할 수 있다. 본 논문에서는 IEEE1394-IEC61883 기반의 멀티미디어 홈 네트워크 환경에서 등시성 자원과 등시성 연결의 효율적인 관리를 위한 미들웨어를 제안한다. 본 논문에서 제안된 등시성 연결 관리 미들웨어는 다양한 종류의 등시성 연결을 지원하며 등시성 연결의 안정적인 복원을 보장하며 멀티미디어 데이터의 실시간 송수신을 보장하도록 설계 구현되었다. 제안된 미들웨어에서 등시성 연결 관리를 위한 코바 APl를 제공하였으며 성능 평가 및 검증을 하였다.

• 한국재난정보학회 논문집
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• 제13권1호
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• pp.73-80
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• 2017

이 논문에서는 프리캐스트 바닥판 위를 이동하는 차량하중에 의한 바닥판 접합거동 특성을 분석하였다. 하중 재하를 위하여 프레임을 제작하였고 각 측정 장치를 활용하여 거동을 파악하였다. 바닥판의 정적응답을 검토하여 이론값과 비교하였고 그 특성은 매우 합리적임을 알 수 있었다. 또한, 동적영향 평가를 위하여 가속도, 속도 및 변위를 측정하여 시험에서 이동하중의 특성을 분석하였다. 이동하중에 의한 동적응답을 위하여 바닥판 진동수를 측정한 결과 하중 범위 변화에 따라 진동 특성도 민감하게 반응하는 것으로 나타났다. 결과적으로 연결부의 동적 응답은 연결방법에 따라 특성이 다르므로 설계에 주의를 기울여야 할 것으로 판단된다.

• 전기학회논문지
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• 제59권1호
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• pp.144-151
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• 2010

The shadowing effects lead to the serious power losses of the PV module. The shadowing effects are caused by several factors such as leafs, dust, antenna and clouds. The dye-sensitized solar cells are more economical than the conventional silicon solar cell that's why the dye-sensitized solar cells are recently focused on. We carried out research on the efficiency of the dye-sensitized solar cell depending on the level of shadow changing the formula of the circuit. The research on the efficiency of the large dye-sensitized solar cell depending on the level of shadow focused on commercialization was carried out. As the results, it is known that the series and parallel connection method is the best choice for the least losses of PV module assemblies. It is especially known that one more series connection is the best choice for the least losses about shadowing effects and current losses in the series and parallel connection.

• 설비공학논문집
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• 제28권1호
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• pp.42-47
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• 2016

Adjacent housing units suffer inevitable thermal losses if an unheated unit exists in an apartment building. Thermal loss of the units adjoining the unheated apartment can be neglected because the contact area is small and insulators are located in the walls. When insulators are not included in the slab between the upper and lower units, 70% of the heat supplied by an Ondol system may be used in the original unit, but 30% is transferred to the unit on the lower floor. Another 30% can be obtained from the ceiling if the upper floor housing unit is heated. This strong thermal connection is a characteristic of Ondol heating in apartment buildings. When there is an unheated unit, the lower floor unit uses 42.3% more heating energy if there is no insulation and 19.5% if a 35 mm insulator is used as in the current guidelines. Therefore, much thicker insulation should be applied to weaken the thermal connection.

• 한국강구조학회 논문집
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• 제8권3호통권28호
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• pp.127-137
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• 1996

Connections as basic elements and an integrated part of a steel frame has an effect on the frame's performance. Conventional analysis and design techniques are based on either idealized fixed or pinned conditions. In fact, the use of rigid or pinned connection model in steel frame analysis serves the purpose of simplifying the analysis and design processes, but all connections used in current pratice possess stiffness and transfer moment which fall between the extreme cases of fully rigid and ideally pinned. To predict the behavior of the semi-rigid steel frames, it is necessary to predict the moment-rotation behavior of the beam-to-column connections. In this research, prediction equation for moment-rotation behavior of the beam-to-column connection is suggested and the effect of design parameters has investigated. Prediction model, in a nondimensional form shows the moment-rotation characteristic for connections. It is composed of the curve fitting power function using standardization constant K and 4 parameter $KM_o$, ${\theta}_0$, b, n based on the pretest result about moment-rotation behavior of connection.

• Journal of the Korean Wood Science and Technology
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• 제28권4호
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• pp.72-82
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• 2000

Attempts were made to analyze the behavior of single and multiple-bolted connections through theoretical methods such as European yield theory, empirical approaching method, and semi-rigid theory instead of many experimental methods that have been actually inefficient and non-economical. In the case of a single-bolted connection, if accurate characteristic values of a material could be guaranteed, it would be more convenient and economical to perform the behavior analysis using a model based on the semi-rigid theory, instead of the existing complex yield model, or the empirical formula which produces errors, giving different results from the actual ones. If the variables of equation determining the load and deformation could be appropriately controlled, the analytical method in conjunction with a semi-rigid theory could be effectively applied to obtain the desirably predicted value, considering that the appropriate solution could be derived through a simpler equation using a less difficult method compared to the existing yield model. It is concluded that analytical method with semi-rigid theory can be used in the behavior analysis of bolted connection because our developed method showed excellent analysis ability of behavior until number of bolt is two. Although our analytical method has the disadvantage that the number of bolt is limited to two, it is concluded that it has the advantage than numerical method which complicated and time-consuming.

• Structural Engineering and Mechanics
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• 제74권3호
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• pp.435-443
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• 2020

The objective of this study was to determine the effective compressive strength of a column-slab connection with different compressive strengths between the column and slab concrete. A total of eight column specimens were fabricated, among which four specimens were restrained by slabs while the others did not have any slab, and the test results were compared with current design codes. According to ACI 318, the compressive strength of a column can be used as the effective compressive strength of the column-slab connection in design when the strength ratio of column concrete to slab concrete is less than 1.4. Even in this case, however, this study showed that the effective compressive strength decreased. The specimen with its slab-column connection zone reinforced by steel fibers showed an increased effective compressive strength compared to that of the specimen without the reinforcement, and the interior column specimens restrained with slabs reached the compressive strength of the column.

• 한국정밀공학회지
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• 제28권9호
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• pp.1103-1109
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• 2011

This research quantitatively confirmed an acoustical anisotropy that exists in a pure titanium plate from the signal of ultrasonic flow detection and suggested a new way to evaluate the acoustical anisotropy by inputting acquired characteristic of ultrasound signal into the neutral network. Using the fact with the suggested method that the characteristic of ultrasound signal is shown differently depending on the pure titanium plate's rolling direction, the neural network was constructed by extracting the characteristic that can decide each direction of $0^{\circ}$, $45^{\circ}$, and $90^{\circ}$ with waveform analysis program. As a result of inputting the characteristic of ultrasound signal acquired from a random rolling direction into the neural network that was built like this, it showed a pattern recognition rate higher than 95% on directions of $0^{\circ}$, $45^{\circ}$, $90^{\circ}$.