Korean Journal of Computational Design and Engineering
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v.13
no.6
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pp.429-439
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2008
With a remote operated manipulator system, the situation at a remote site can be rendered through remote visualized image to the operator. Then the operator can quickly realize situations and control the slave manipulator by operating a master input device based on the information of the virtual image. In this study, the remote operator visual support system (ROVSS) was developed for viewing support of a remote operator to perform the remote task effectively. A visual support model based on virtual environment was also inserted and used to fulfill the need of this study. The framework for the system was created by Windows API based on PC and the library of 3D graphic simulation tool such as ENVISION. To realize this system, an operation test environment for a limited operating site was constructed by using experimental robot operation. A 3D virtual environment was designed to provide accurate information about the rotation of robot manipulator, the location and distance of operation tool through the real time synchronization. In order to show the efficiency of the visual support, we conducted the experiments by four methods such as the direct view, the camera view, the virtual view and camera view plus virtual view. The experimental results show that the method of camera view plus virtual view has about 30% more efficiency than the method of camera view.
Transactions of the Korean Society of Pressure Vessels and Piping
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v.11
no.2
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pp.68-74
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2015
Time domain response analysis for vibro-impact nonlinear behavior of multi-span tube with loose supports was performed using commercial FEA code and user subroutine. Support geometry of multi-span tube with a finite gap is realistically modeled by analytical rigid surface. Model of hydrodynamic force is based on the Qusai-steady model which accounts for the inclined angle of relative flow velocity and time delay between flow force and resulting tube motion. During tube vibration from flow loading, impact and friction at the support location is simulated using commercial FEA code with master slave contact algorithm. Analysis results has reasonable agreement with those of references and test experience. Plan of further refinement of analysis model and future test verification is briefly introduced.
The purpose of this study is to provide a basic for a desirable bathroom plan of apartments. As a first step in this process, we analyzed the bathroom plans of the apartments(area: 10-69 pyung) constructed in 8 sections in Seoul from 1971 to 1995 where 65,801 households live. In this study, the numbers, location, size, and proportion of the bathroom and dressing room, and the direction of the bathroom door in apartments are examined. The major frindings are as follows; 1) We have found that the numbers of bathrooms to increase in more than 20s pyung apartment since 1990. 2) Except a master bathroom, the another one for the guest is located in enterance in more than 40s pyung apartment. 3) The door of the bathroom faces corridor in more than 40s pyung apartment. So, it is possible for them to lessen discomfortness when they coming in and out of the bathroom. 4) It was found that the size of bathroom were decreased in most cases. 5) They did not plan a dressing room in 10s pyung - 60s pyung and the size of dressing room was decreased in 60s pyung apartment.
This study introduces a novel approach for locating damage in a structure using wireless sensor system with local level computational capability to alleviate data traffic load on the centralized computation. Smart wireless sensor systems, capable of iterative damage-searching, mimic an optimization process in a decentralized way. The proposed algorithm tries to detect damage in a structure by monitoring abnormal increases in strain measurements from a group of wireless sensors. Initially, this clustering technique provides a reasonably effective sensor placement within a structure. Sensor clustering also assigns a certain number of master sensors in each cluster so that they can constantly monitor the structural health of a structure. By adopting a voting system, a group of wireless sensors iteratively forages for a damage location as they can be activated as needed. Since all of the damage searching process occurs within a small group of wireless sensors, no global control or data traffic to a central system is required. Numerical simulation demonstrates that the newly developed searching algorithm implemented on wireless sensors successfully localizes stiffness damage in a plate through the local level reconfigurable function of smart sensors.
Journal of the Korean Institute of Traditional Landscape Architecture
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v.34
no.1
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pp.18-39
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2016
The study pertains to reviewing and discussing of the master plan of the main buildings in the palaces of Joseon Dynasty regarding on a Feng Shui concept that has been implemented on the palace axis that is originated from the main mountain. Gyeongbokgung (景福宮) Palace is located on the northwest coner of Hanyang (漢陽) and on the tip of the main mountain which is in contrast a quite distinguishable from the location of the Fobidden city in Beijing located in the middle of a vast basin. Changdeokgung (昌德宮) Palace as well is also located on the tip of Eungbong (鷹峯), a part of Samkaksan (三角山) mountain, of which the locations were designed for the palaces to receive the benevolent force from the main mountain. The same concept was also applied to appointing the ideal location of the maJor buildings such as Jungjeon (正殿: The throne hall), Pyunjeon (便殿: The king's office) and Chimjeon (寢殿: The king and queen's residence) in the palace that must receive the benevolent force from the qui stream also originated from the main mountain, as such that the buildings have in close relationship with the king. Amisa (蛾眉砂) had been considered as an important geographical milestone of the estate where the palace is located, especially as the guiding landmark for other buildings that must be on the land axis. The land axis with the Amisa as the starting point attributed the Feng Shui as an important measure that determines the location and the shape of other buildings. The buildings location was appeared as having the conceptual buildings location as 'front office-back bedroom building (前朝後寢)' and 'three gates-three sectors (三問三朝)' as per the Rites of Zhou (周禮). On both palaces, Amisa is located on the benevolent point of the land, and the king's bed room buildings are located near the Amisa. The main offices were located on the south of the king's bed room buildings. By practicing this type of concept, consequently the king can receive the pure benevolent force first. In the case of the clearly distinguished locations of the buildings in Gyeongbokgung Palace, Chimjeon, Pyunjeon and Jungjeon were located on the same main qui stream. However, in Changdeokgung Palace where scattered qui stream is observed, the buildings are located on the scattered qui stream. The study found that the type of location of Jungjeon receives least amount of benefit from the Feng Shui but reflects primarily the king's authority rather than order and formality of the space.
This study was conducted on the premise that plan types of the public residential houses proposed after the 1945 implicatively showed the developing process of the modern housing. The formal characteristics created through the developing process were analyzed in Micro-Historically. Moreover, by providing a new viewpoint on the changes of the residential houses that occurred around 1945, we tried to provide the fundamental research background for the research on the developing processes of the future housing cultures. The research pursued mainly on the major spaces that became the modern change indices of housing plan changes from the traditional housings in 1940s to the modern housings such as the master bedrooms(An-Bang), kitchen, the main floored-space(Maru), and the secondary bedroom (Kune-Bang). The major experimental subjects are the 87 public residential plan types designed and supplied by the Korea Housing Cooperation in between 1945 and 1970. The study synthesized the developing process of the public residential houses from the traditional residential houses in 1940s through modern situation and intrusion of foreign housing cultures. Following results were derived from the study: First, various and experimental housing plan types had been proposed as public residential houses since 1945. Among them, the plan having the main floored-space(Maru) were the representative type of public residential houses and various series of houses were constructed based on this type. Second, the main floored-space(Maru) type had continued building connection order of the R-M-R that were used in the traditional houses. On the other hand, with decomposition of connecting ring between the main floored-space(Maru) and the kitchen, rationalization of women circulations and introduction of family-centered spaces had been resolved the demands of modern society. It had greate effect on settlement of the current double-row Maru plan type. Third, in Korea most of plan types for the public residential houses were proposed in between 1945 and 1965. Forth, the location of kitchen and relation between Maru and the master bedroom were arranged visually on the corner and center of the rear row with the micro change characteristics of the public residential houses. In this process, the front row was similar with traditional residential houses but the rear row was differentiated and developed with expansion of Maru and Ondol rooms, increase of closet spaces, and introduction of kitchen that divided spaces for sleeping and eating.
The Journal of The Korea Institute of Intelligent Transport Systems
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v.21
no.2
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pp.33-43
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2022
The number of car crashes increases along with the increasing number of vehicles. Hence, diverse initiatives on traffic accidents have been implemented, targeting zero crash fatalities. According to the 3rd Traffic Safety Master Plan of 2016, the current standard selecting road accident black spots prioritizes locations with the high cumulative death toll. While this standard is suitable for roads that a city government manages to some extent, it is not suitable for roads less than 20 meters that a borough (Gu) handles. The roads under the supervision of a borough do not have enough death toll, and thus improvements on its road accident black spots are highly limited. In addition, discovering the causes of traffic accidents is not easy when the number of car accidents is obtained by considering only fatal accidents, which are relatively low in number. Therefore, including all traffic accidents might identify causes of accidents and result in better advancements. Therefore, this research follows rational decision-making and suggests new National Traffic Safety Master Plan standards. These new standards are obtained by comparing accident costs between the location of fatal crashes and road accident black spots. The analysis result shows that considering all types of accidents yields better results. For example, a Three-way Intersection in front of Zion Day Care Center, one of the selected spots under the current standard, has lower road crash costs than Sinchon Intersection, a selected spot under a new standard. Therefore, the study concludes that the standards to select road accident black spots need to include traffic accident severity and road crash costs.
Journal of the Korea Academia-Industrial cooperation Society
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v.15
no.4
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pp.2460-2468
/
2014
A local rain that is concentrated in specific area in a short time frequently occurs due to recent abnormal weather. To prevent potential flood disasters, therefore, it is necessary to be established to the flood control system. Checking the river design standard, however, hydrologic design frequency of water gate is only marked as over 20 years, so this fact shows that the standard is unclear. The inland inundation modeling considering the stage in a river and quantitative assessment are required to reduce flood damage. The simulation for internal inundation is very complex and is time-consuming due to considering hydraulic hydrology characteristics at the same time. Using the already established river master plan, consequently, this study proposed the simple and convenient method for assessment of the internal inundation simulation. Using the proposed method in the upper and middle regions of a river, influences for design frequency or water gate location were assessed by applying the nine probability precipitation with design frequency and by targeting the water gates which are installed in five inlands.
Journal of the Korean Association of Geographic Information Studies
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v.4
no.4
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pp.29-38
/
2001
This study addresses the topic of suitability analysis for helping with land use planning, which is one of important decision-making in urban planning, utilizing geographic information system. Covering the Kumi City before integrating with neighbor county, the site suitabilities for land uses, which are categorized into residential, commercial, industrial and green, were analyzed using the overlay method based upon the database constructed for this study. In the process, assessment criteria which include environmental factors and relative weights were determined and also the land use/cover map and NDVI map which were generated through satellite image processing were included in the database. The suitability maps by four function spaces were derived according to the grade and compared with the present land use state and the land use concept map of urban master plan. For more accurate analysis, practical developing plan, land price data, soil data should be included. Also if the demand estimation data by each land use had been added, the reliability of location allocation could have been raised.
Journal of the Korean Society of Environmental Restoration Technology
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v.6
no.6
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pp.14-24
/
2003
This study had researched use conditions of forty-seven arboreta in the inside and outside of the country for the suggestion of activation plan of provincial arboretum. Chungnam Keum-Kang Arboretum in Kongju-Si, Chung-Cheong Nam-Do, had been surveyed as a case study. The survey was focused on current condition, location, ecological resources, characteristics and so on. In addition, questionnaire of users of Keum-Kang arboretum were conducted. Chungnam Keum-Kang arboretum is located in the inland area and has many vegetations. It is a provincial arboretum which was planted by trees, shrubs and vines, and a public garden which was used by paid admission. It has natural recreation forests, tropical green houses and breeding grounds for birds and wild animals. It, however, has many problem in the use and management system. And the shortages of attraction and program for user are serious problem. For the use activation and the improvement of management of this arboretum, this study suggested as follows ; (1) The responsible experts in charge of the general management of arboretum are demanded. (2) Term master plan for improvement of arboretum must be established. (3) It is necessary to manage for collection, propagation, display and preservation of plant species. (4) It is necessary to hold suitable and variety events for the seasons. (5) It is needed to arrange fitly convenience facilities.
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