• International Journal of Computer Science & Network Security
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• 제23권11호
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• pp.1-7
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• 2023

In the current Internet system, there are many problems using anonymity of the network communication such as personal information leaks and crimes using the Internet system. This is why TCP/IP protocol used in Internet system does not have the user identification information on the communication data, and it is difficult to supervise the user performing the above acts immediately. As a study for solving the above problem, there is the study of Policy Based Network Management (PBNM). This is the scheme for managing a whole Local Area Network (LAN) through communication control for every user. In this PBNM, two types of schemes exist. As one scheme, we have studied theoretically about the Destination Addressing Control System (DACS) Scheme with affinity with existing internet. By applying this DACS Scheme to Internet system management, we will realize the policy-based Internet system management. In this paper, basic system design for PBNM scheme for multi-domain management utilizing data science and AI is proposed.

• Geomechanics and Engineering
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• 제8권4호
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• pp.615-630
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• 2015

The use of helical anchors has been extensively beyond their traditional use in the electrical power industry in recent years. They are commonly used in more traditional civil engineering infrastructure applications so that the advantages of rapid installation and immediate loading capability. The majority of the research has been directed toward the tensile uplift behaviour of single anchors (only one plate) by far. However, anchors commonly have more than one plate. Moreover, no thorough numerical and experimental analyses have been performed to determine the ultimate pullout loads of multi-plate anchors. The understanding of behavior of these anchors is unsatisfactory and the existing design methods have shown to be largely inappropriate and inadequate for a framework adopted by engineers. So, a better understanding of helical anchor behavior will lead to increased confidence in design, a wider acceptance as a foundation alternative, and more economic and safer designs. The main aim of this research is to use numerical modeling techniques to better understand multi-plate helical anchor foundation behavior in soft clay soils. Experimental and numerical investigations into the uplift capacity of helical anchor in soft clay have been conducted in this study. A total of 6 laboratory tests were carried out using helical anchor plate with a diameter of 0.05 m. The results of physical and computational studies investigating the uplift response of helical anchors in soft clay show that maximum resistances depend on anchor embedment ratio and anchor spacing ratio S/D. Agreement between uplift capacities from laboratory tests and finite element modelling using PLAXIS is excellent for anchors up to embedment ratios of 6.

• 한국주거학회:학술대회논문집
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• 한국주거학회 2011년도 춘계학술발표대회 논문집
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• pp.153-158
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• 2011

According to the change of life environment and economic growth, the more city has highly developed, the more concentrated urban function. That is, city is required for adding infra structure. But, both of limited land resources and financial problems made it impossible to add infra structure. So, the necessity of multi-dimensional planning of urban infra structure was recognized. Especially, In Urban residential area, in order to secure parking area, It is on the increase that mixed-use of the playground of school in the high density area and the empty space of park. School and park is closely connected with town community, playing a central role on town life. For this reason, they are highly demanded for providing space in the urban residential area and also expected to be effective. However, people using park and school are almost young students and the elderly, it needs to consider not only the parking convenience also the safety of users in design process. In this study, we analysed the physical characteristics and the utilization of mixed-use of school and park. and then evaluated the case in the point of convenience and safety. For this, first we selected the case among the sites constructed in seoul, and divided 2type of 'slope type' and 'flatland type'. The meaning of this study is to suggest elementary standards for design in the point of multi-dimensional land use planning.

• 한국전산구조공학회논문집
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• 제26권4호
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• pp.275-281
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• 2013

본 논문에서는 유전알고리즘을 사용하여 철근콘크리트 구조물의 최적 지진설계를 효율적으로 수행하기 위해 클러스터를 사용하는 경우 확장성을 확인하였다. 클러스터를 구성하는 코어프로세서의 개수를 증가시키면서 유전알고리즘의 각 세대에 소요되는 시간의 감소를 관찰하였다. 단일 퍼스널 컴퓨터의 구성을 분류한 후, wall-clock time과 암달의 법칙으로 예상된 값을 비교하여 예상되었던 병목현상을 확인하였다. 이에 클러스터의 확장성에서 복합적인 요인에 의한 경향을 확인할 수 있었다. 병목현상의 물리적인 요인과 알고리즘 측면에서의 요인을 구분하기 위해 유전알고리즘의 개채수를 나누어 실험을 수행하여 결과를 확인하였다.

• 한국통신학회논문지
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• 제33권9A호
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• pp.853-866
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• 2008

본 논문에서는 IEEE 802.22 기반의 인지라디오 시스템에서 다중 홉 릴레이 방식의 적용 방안을 제안한다. 먼저, 중계기를 통한 전송 시나리오를 가정하고 이를 지원하기 위한 물리 채널 프레임 구조를 예시한다. 다음으로, 분산 감지 (distributed sensing) 방식을 이용한 가용 채널 결정 방식을 제안하고 이를 토대로, 기지국 중심의 중앙집중형 (centralized) 채널 할당 기법 및 릴레이 전송을 위한 중계기 선택 알고리즘을 개발하였다. 그리고 수학적 해석과 시뮬레이션을 통한 성능 분석 결과는 제안한 다중 홉 릴레이 방식이 중계기를 사용하지 않은 기존의 인지 라디오 시스템에 비해 스펙트럼 이용효율과 시스템 수율 측면에서 성능 향상이 있음을 보여준다.

• 한국실내디자인학회논문집
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• 제21권6호
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• pp.71-78
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• 2012

These days, design has been used a very useful means to achieve differentiated urban images and establish the identity of a city, and as an effort to specialize local industries through design, public design projects are competing one another. However, the projects have considerable negative effects because of diverse reasons such as unorganized procedures. For continuous and organized projects which meet demands of the interested persons of public design, reasonable design management should be introduced with a use of design as a strategic means of management Therefore, this study examined the concepts of design management and its meaning in space and analysed cases of implementing components for management of public design projects. It searched for the factors of design management indicating design-oriented management and presented a strategy model which complements design-oriented management. The results of the study are presented as follows: First, strategic implementing components needed for a space design management process were obtained. A design recognition process aimed at what space aims at and needed to identify active components such as physical and indigenous environment. A design inquiry process included problem solution considering characteristics of multi-dimensional space active components, design development considering behavioral functions of humans, checklists needed to complete design and necessary components to institutionalize design. For definition of project space, guideline projects of public design should be progressed in the same context as urban design, and developmental directions of public design needed design inquiry in terms of space to create various experiences in space.

• 한국시뮬레이션학회논문지
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• 제25권4호
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• pp.43-52
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• 2016

WSN(Wireless Sensor Network)을 구성하는 노드의 빠른 프로토타이핑을 위해서, 상용 MCU(Microcontroller) 기반의 센서 노드 보다는 하드웨어 재구성이 가능한 FPGA 기반의 구현이 적합하다. 본 논문은 FPGA 기반 센서 노드의 노드와 네트워크 레벨의 다층 분석을 위한 시뮬레이션 환경을 제안하고자 한다. 제안 환경은 FPGA 기반 노드와 네트워크 시뮬레이터인 NS3가 IEEE 연동 표준인 HLA(High-level Architecture) 기반의 연동 미들웨어 RTI에 참여하여 방식을 따른다. 본 환경은 기존의 FPGA 디자인 툴을 server-client 방식으로 설계한 어댑터, FPGA와 연결된 호스트 컴퓨터에서 회로에 신호 입출력이 가능한 디지털 블록, 연동 스크립트를 이용하여 FPGA 에뮬레이션과 연동이 되도록 지원한다. 단독으로 동작하는 NS3 또한 HLA 기반 연동을 위해 수정하였다. FPGA 제안 환경은 에뮬레이션과 이벤트 기반으로 동작하는 NS3 시뮬레이션 간 서로 다른 시간 진행 방식은 문제를 해결하기 위해 pre-simulation 기술을 적용하여 설계하였다. 제안하는 시뮬레이션 환경을 IEEE 802.15.4 저속도 무선 네트워크 통신망 분석에 적용하였다.

• 교육시설 논문지
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• 제26권5호
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• pp.25-36
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• 2019

School gymnasium is a multi-purpose large space building for various events and physical education activities, and is a facility that requires an approach to the desirable structural design, besides mechanical problems of structure against loads. For the integrated structure design concerning the architectural features, the major considerations of gymnasium planning that are the internal and external shape of the gymnasium, the space scale with structure members, the structural efficiency by members weight reduction and openness of the gymnasium space will have to take into account in the structural planning. From this point of view, the several cases of the school gymnasium were investigated and the parametric analyses were performed to the models using the various structural system. The parameters were the composition elements of structure system that are profile of structure, rigidity of member, connection and anchorage and stability. At the result, It was presented that the profile of structure member was the most influential factor to structural efficiency and the effect of the form and space of gymnasium. Also the design informations of structure design having the various feature of form and space were presented for the initial gymnasium planning.

• Nuclear Engineering and Technology
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• 제55권9호
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• pp.3164-3182
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• 2023

The CRUD on the fuel cladding under the pressurized water reactor (PWR) operating condition causes several issues. The CRUD can act as thermal resistance and increases the local cladding temperature which accelerate the corrosion process. The hideout of boron inside the CRUD results in axial offset anomaly and reduces the plant's shutdown margin. Recently, there are efforts to revise the acceptance criteria of emergency core cooling systems (ECCS), and additionally require the modeling of the thermal resistance effect of the CRUD during the performance analysis. There is an urgent need for the evaluation of the effect of the CRUD deposition on the cladding heat transfer under PWR operating conditions, but the experimental database is very limited. The experimental facility called DISNY was designed and constructed to analyze the CRUD-related multi-physical phenomena, and the performance analysis of the constructed DISNY facility was conducted. The thermal-hydraulic and water chemistry conditions to simulate the CRUD growth under PWR operating conditions were established. The design characteristics and feasibility of the DISNY facility were validated by the MARS-KS code analysis and separate performance tests. In the current study, detailed design features, design validation results, and future utilization plans of the proposed DISNY facility are presented.

• 한국실내디자인학회논문집
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• 제17호
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• pp.65-72
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• 1998

This study intends to analyze the various spatial structures and characteristics of the museum based on the two of the Renzo Piano's recent projects Menil Collection '||'&'||' Museum and Beyeler Foundation Museum Which defined the direction of the "Third Generation" in museum architecture with reference to the quality of spatial experience and design applications. Comparison and analysis were done on the basic spatial organization floor layout accessibility exhibition area lighting plan and circulation between the two museum. Through the itemized common characteristics of the museum the architect's proposal on meaning and direction of the new museum architecture can be viewed. The contemporary museums distinguish themselves quite clearly from their predecessors and this applies both to their own form and to their spatial organization. As the public demands and requests toward the museum building facility expand everyday the architect must respond by providing multiple types of space where people can experience different atmosphere in each area. One concept he used to create multi experienced area was manipulation of the natural light using by the state-of-the-art techniques of the light filtering system and multi-layering roof system to protect the valuable collections against the direct sunlight. But mainly it was to prove his strong belief in "architecture of light" by creating space with minimized meaning by purposely distinguished area in order to provide maximum support to the physical value of the collection " The connection with nature" is another concept which Piano used to provide the public a tranquil experience through out the architecture which engages in a lively dialogue with art. In spatial organization Piano concerned on functionality which not only concentrated on the visitor's point of view but also on the museum staff's comfort. Unlkie the traditional museum he alternates various size of exhibition areas for spatial hierarchy. Specially the spatial flexibility that the temporary exhibition areas are able to be expanded to the permanent exhibition areas by adjoining t재 spaces differentiate Piano's new museum from the rest. museum from the rest.