• 한국지능정보시스템학회:학술대회논문집
• /
• 한국지능정보시스템학회 2005년도 공동추계학술대회
• /
• pp.442-450
• /
• 2005

One of the important tactical problems for the efficient operation of container terminals is to determine the usage of storage space There are two different strategies for stacking containers; mixing strategy. in which outbound containers and inbound containers are mixed in the same block. and segregating strategy, in which outbound containers and inbound containers are stacked in blocks different from each other. The performance of space allocation strategies also depends on the types of handling equipment in the yard and the number of handling equipment allocated to each block. A simulation model is developed considering various handling characteristics of yard cranes. Performances of various space and equipment allocation strategies are evaluated by using the simulation model.

• 한국조경학회지
• /
• 제23권2호
• /
• pp.44-62
• /
• 1995

This study investigated the landscape space of Chosun Dynasty pavilions in the Sang-ju Region. Five renowned pavilions were selected for study by Phenomenological and IDRISI (4.1) S/W. The results were as follows ; Pavilions were erected for studying cultivating moral sense admiring the view relieving illness and commemorat memoring people. A total of 248 pavilions were erected in the Sang-ju Region between 1392 and 1895 AD, most of them duing he golden age from 15001670 AD. Pavilions and open space were composed in harmony with nature borrowing natural landscape features. Landscape characteristics were analysised with IDRISI(4.1) S/W; pavilions were ma711y located at the bottom of a mountain with stream The Inner garden was formed by a fence and Lagerstroemia indica or a few trees. The Outer garden was formed by mixed stands of Pinus dentsiflora, Zelkowa serreta, Acer formosum and well conserved natural vegetation.

• 호남수학학술지
• /
• 제44권2호
• /
• pp.179-194
• /
• 2022

In the present study, we investigate generic lightlike submanifolds of indefinite nearly Kaehler manifolds. After proving the existence of generic lightlike submanifolds in an indefinite generalized complex space form, a non-trivial example of this class of submanifolds is discussed. Then, we find a characterization theorem enabling the induced connection on a generic lightlike submanifold to be a metric connection. We also derive some conditions for the integrability of distributions defined on generic lightlike submanifolds. Further, we discuss the non-existence of mixed geodesic generic lightlike submanifolds in a generalized complex space form. Finally, we investigate totally umbilical generic lightlike submanifolds and minimal generic lightlike submanifolds of an indefinite nearly Kaehler manifold.

• 한국실내디자인학회논문집
• /
• 제20권6호
• /
• pp.311-320
• /
• 2011

Public libraries in Korea have undergone changes from libraries for just reading or keeping books to libraries with cultural facilities that provide information through various media. It was because of the "plan for building the information-oriented library" in 2000 that made the complexation of public library in progress. The alterations of the system have changed the structure as well as the grade ranks but haven't been considered enough for administrators or visitors. Hereupon, we are to study of the features by analyzing how the application of the system changed the structure of library. There are four stages in research methods. First, concept of public library and functional elements requested in the process of complexation were studied from literature. Second, vertical, horizontal and circulate changes were studied by applying subject libraries into prior research stereotyping the libraries. Third, mutual relations between each place were studied through J-Graph by elements. Lastly, rank changes according to centrality of space and users were quantitatively studied with space syntax. 4 notable changes were found in these analyses. (1)Vertical, horizontal and circulate structure of public libraries were homogenized. Since 2001, however, they have become diversified as all-in-one or detachable. (2)The space structure of library before 2001 was shallow tree shape while in 2001, period of transition, was the tree shape mixed with ring shape. As time goes on, it has become shallow tree shape again but connected by ring shape in part of reading and common space and in digital reference room. (3)Digital reference room was center of the space around 2001 and it ranked top for integration. After 2007, however, it has become setting off-center. (4)About the purpose of using public libraries, using it as space for administrators ranked top followed by space for visitors and common space before. For now, common space ranks top and space for visitors and administrators. 5 subject public libraries were selected respectively before and after 2001.

• 제어로봇시스템학회논문지
• /
• 제17권1호
• /
• pp.22-30
• /
• 2011

Plane detection is very important information for mission-critical of robot in 3D environment. A representative method of plane detection is Hough-transformation. Hough-transformation is robust to noise and makes the accurate plane detection possible. But it demands excessive memory and takes too much processing time. Iterative randomized Hough-transformation has been proposed to overcome these shortcomings. This method doesn't vote all data. It votes only one value of the randomly selected data into the Hough parameter space. This value calculated the value of the parameter of the shape that we want to extract. In Hough parameters space, it is possible to detect accurate plane through detection of repetitive maximum value. A common problem in these methods is that it requires too much computational cost and large number of memory space to find the distribution of mixed multiple planes in parameter space. In this paper, we detect multiple planes only via data sampling using Self Organizing Map method. It does not use conventional methods that include transforming to Hough parameter space, voting and repetitive plane extraction. And it improves the reliability of plane detection through division area searching and planarity evaluation. The proposed method is more accurate and faster than the conventional methods which is demonstrated the experiments in various conditions.

• 한국실내디자인학회논문집
• /
• 제23권3호
• /
• pp.231-238
• /
• 2014

Recently, many people can experience the virtual space by smartphone, and they use many games. In particular, this change has great implications in the collaborative and communicative planning paradigm, which is residents' participation and agreement becoming important in community making and urban design. This study analyze the case of the five virtual space games about community making and urban design, and examine the related regal system. Game users can construct roads, houses, buildings and facilities in the virtual city. Then, they create profit, and promote the growth of virtual city. In these games, construction elements are classified residential, commercial, industrial, parks, green spaces, public building, and roads. But these elements does not identified clearly, and they mixed. By analyzing of related regal system, these games focus on the individual buildings, spaces, and facilities rather than considering the terms of urban planning. To complement the virtual space game with the aspects of urban planning, these games can encourage the participation capability and enhance the communication skills of citizens.

• 한국게임학회 논문지
• /
• 제22권1호
• /
• pp.65-76
• /
• 2022

메타버스 경험은 실제 세계와 어떤 차이가 있을까? 본 연구는 특히 공간과 대화 주제와 관련해서, 메타버스를 사용하는 공간과 커뮤니케이션의 내용이 메타버스 경험에 주는 영향을 밝혔다. 75명의 연구 참여자를 대상으로 한 3(대화 공간: 대면 vs. 넓은 공간에서의 메타버스 vs. 좁은 공간에서의 메타버스) x 2(대화 주제: 긍정적 vs. 부정적) 혼합 요인 설계 실험 연구 결과, 공간에 따라 반응 정도에, 대화 주제에 따라 친밀감에 통계적으로 유의미한 차이가 있었다. 연구 결과는 메타버스 경험이 현실 공간과 연관되어 있고, 특히 비몰입형 기기를 활용한 메타버스 콘텐츠를 제작할 때, 현실 공간을 염두에 두어야 함을 시사한다.

• 한국터널지하공간학회 논문집
• /
• 제21권3호
• /
• pp.323-345
• /
• 2019

토사지반과 핵석지반에서 EPB 쉴드 TBM을 통한 성공적인 터널 시공을 위해서 굴착면 전방의 지반 정보를 정확히 파악하는 것이 필요하다. 본 연구에서는 전기비저항 탐사와 유도분극(induced polarization) 탐사를 함께 활용하여 복합토사지반과 핵석지반에 대한 전방 예측 방안을 제시하고자 하였다. 토사지반의 구성은 EPB 쉴드 TBM에서 첨가재 선택에 필수요소이며, 핵석지반은 기계화 시공에서 난이도가 높은 지반이기 때문이다. 탐사는 TBM이 굴진을 멈추고 세그먼트 1링을 조립할 시에 커터헤드에 설치된 4개의 전극을 활용하여 수행된다고 보았다. 토사지반의 경우 화강풍화토, 모래, 점토로 구성된 복합지반에 대해 축소모사하여 실내실험을 수행하였다. 실험 결과 전기비저항은 복합지반 이론해와 상당히 일치하였으며 유도분극은 경우에 따라 전기비저항과 경향성이 일치하거나 완전히 상반되었다. 이러한 결과를 토대로 실제 현장에서 적용 가능한 토사지반 예측방안을 제시하였다. 핵석지반의 경우 균질지반에서 핵석지반으로 굴착해 나가는 상황을 축소모사하였으며 핵석의 불규칙성을 난수를 통해 모사하였다. 실험결과 전기비저항은 핵석지반에 접근할수록 증가하였고 유도분극은 불규칙하게 오르내림을 거듭하는 경향을 나타내었다.

• 한국터널지하공간학회 논문집
• /
• 제25권6호
• /
• pp.403-421
• /
• 2023

도심지 내 지하구조물 개발의 필요성이 증가함에 따라, TBM 터널 시공 중 터널 굴진면 전방예측에 대한 연구가 꾸준하게 진행되고 있다. 본 연구에서는 TBM 터널 굴착 중 복합지반을 조우하는 상황을 모사한 유한요소(finite element) 수치해석 모델을 개발하였다. 개발된 수치해석 모델은 이론해와 실내실험으로부터 측정된 전기 비저항 결과값과의 비교를 통해 그 성능을 검증하였다. 이후 실제 터널의 형상과 지반조건, 측정전극의 배열 조건 등 전기 비저항 탐사에 대한 영향 변수를 설정하고 이에 따른 매개변수 해석을 수행하였다. 그 결과, 복합지반 내 경계면의 경사가 가파를수록, 복합지반을 구성하는 두 지반 사이의 전기 비저항 차이가 클수록, TBM 굴착 중 전기 비저항 측정값이 더 급격하게 변화함을 확인하였다. 또한, 보다 효율적이고 정확한 복합지반 예측을 위해 적절한 전극 간격 및 전극 배열 위치 선정의 중요성을 제고하였다. 결론적으로, 본 연구에서 개발된 수치해석 모델을 통한 터널 막장면 전방 복합지반 예측은 TBM 터널 시공 과제의 구조적 안정성과 경제적 효율성 증대에 이바지할 것으로 사료된다.

• 한국석유지질학회:학술대회논문집
• /
• 한국석유지질학회 2000년도 제7차 학술발표회 발표논문집
• /
• pp.14-30
• /
• 2000

Hierarchically controlled sequence stratigraphic analysis shows that the Lower Ordovician mixed carbonate-siliciclastic Mungok Formation, Korea consists of three depositional sequences: T1, T2, and T3. Sequence boundaries are generally marked by abrupt transition from coarse-grained shallow-water carbonates to fine-grained deeper-water carbonates mixed with fine-grained siliciclastics, and show indication of subaerial exposure such as karstification. Within this sequence stratigraphic framework, facies characteristics indicate that the Mungok sequences were mostly deposited in subtidal ramp environments. High-frequency cycles consist of upward-shallowing facies successions. Cycles of shallow-water and basinal deposits are not represented well, probably due to cycle amalgamation. Cycle stacking patterns do not show a consistent thickness change that reflects a large-scale sea-level change due to unfilled accommodation space. The Mungok sequences show that many factors including relative sea-level change and topography are involved in controlling sequence development on carbonate ramps. The depositional setting evolved from the high-energy ramps in the sequences T1 and T2 into the low-energy ramp in the sequence T3. Topography is interpreted to have been responsible for the different energy regimes of the carbonate ramps in the Mungok sequences. The high ramp gradient in the sequences T1 and T2 seems to be caused by space-time-dissociated differential sedimentation resulting in spatially narrow distribution of sediment filling, which in turn may be related to high rate of relative sea-level change. In contrast, low ramp gradient was maintained in the sequence T3 during slow changes of relative sea level resulting in broad distribution of sediment filling.