• Title/Summary/Keyword: 기술적 요소

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Design and Evaluation of Fast-Handover Mechanism Between Hetrogeneous Networks Considering the Location Management in PMIPv6 (PMIPv6에서의 위치관리기법을 고려한 이 기종 망간의 Fast Handover 기법 설계 및 평가)

  • Shim, JaeSung;Park, SeokCheon
    • KIPS Transactions on Computer and Communication Systems
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    • v.1 no.3
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    • pp.219-228
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    • 2012
  • As the wireless Internet become more widely accessible, variety of Internet services can be used without limitation of location. However, existing mobility management methods such as MIP and PMIP of IETF requires the load of heavy protocol stack on the mobile nodes or the addition of components such as LMA and MAG. In this paper, we proposed the location management technique in the PMIPv6 and Fast Handover technique. according to the moving pattern of the node, the location management technique proposed in order to adjust the paging area dynamically. The Fast Handover technique applied MIH technology and it reduced the handover signal processing time between heterogeneous network. The location management cost in the environment which the node moves in order to evaluate this and handover delay time was calculate. The proposal technique was efficiently more evaluated than PMIPv6 with the smallest 29% and maximum 83%.

A Development of HVF (Hnagul Vector Format) for Internet GIS (인터넷 지리 정보 시스템을 위한 HVF (Hnagul Vector Format)의 개발)

  • Moon, Jin-Yong;Koo, Yong-Wan
    • The Transactions of the Korea Information Processing Society
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    • v.7 no.2
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    • pp.321-327
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    • 2000
  • Geographical Information System (GIS) is composed of hardware, software, data, and methods. Among the components, data is considered to be the most important factor in GIS. In this paper, we describes HVF, the most recent technology pioneered by GIS researchers. HVF is a format for efficient usage of spatial object in order to express, save and transform in Internet GIS. Fist, we describe the definition of HVF syntax, then the implementation of Header Section Generation Module and Main Section Generation Module through the API. Second, we develop a spatial object converter for HVF to transform figures into data structures, which are compatible among different GIS applications. For this purpose, we design and implement three units of modules, which are File Manipulation, HVF Import and HVF Export Module. Since the issues of network traffic and Hangul processing in Internet GIS are important, we expecially consider development of HVF in terms of spatial data size.

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Improvement on the Existing Valuation Method of the Government, University and Industry Cooperative Regional Development Projects (지역협력형 지역개발 모델의 평가방법론 연구 -산학관 협력체계에 관한 의견조사와 현황분석을 중심으로-)

  • Baek, Ki-Young
    • Journal of the Korean association of regional geographers
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    • v.4 no.2
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    • pp.119-138
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    • 1998
  • This paper aims to evaluate the regional development model related regional cooperative system, especially, with the governmental-educational-industrial mutual cooperative establishment plan for regional development to propose the basic direction pursued by engineering colleges, regional development policy and policy of science and technology. It proceeds through the analysis of the distinctive qualities of modern scientific technique and the system to pursue it's policy, and the study of the necessity and concepts of regional cooperative system. For this, the present condition and main issues regarding the cooperative research system among the government, education and industry complex such as the regional consortium projects and the regional cooperative research center etc, are analyzed and examined. Besides these, questionnaire survey method for experts on regional development is used concerning the regional cooperating system, their ongoing cooperative research, main issues and the roles of the mutual cooperative system. In conclusion, it proposed evaluating methods for solidifying cooperation and development of mutual relations between regional development and regional cooperative system.

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A study on the type analysis of design magazine through analyzing tool of Magazine Identity (매거진아이덴티티(Magazine Identity)분석툴을 통한 디자인잡지 유형분석연구)

  • 이나리;백진경
    • Archives of design research
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    • v.17 no.1
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    • pp.15-24
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    • 2004
  • Information technology (IT) revolution rapidly advanced from the end of the 20th century has caused an extreme change in the publication market, which brought fierce struggle for existence. In this whirlpool, magazine, which is settling as a part of culture and as a center field of publication, presswork, is concentrating in making new determined position with comparatively liberal theme. So identity study that enables readers to remember a magazine more easily, will suggest a new direction of improvement as a culture business by inducing the brand-making of a magazine. This study is focused on the ability of configuration of its unique image of a magazine building an identity in the magazine design field. Each type of magazine has common characteristics but even though it is grouped into same type, it shows mobility on the relative importance of application according to the strategy of the magazine rather than matching perfectly to the type. The result is limited to the range of professional design magazine. However, through result-pursuing study procedure, it is anticipated of its gui dance of improvement of magazine design at large as well as professional design magazine by inquiring of consequence and utility of Magazine Identity in the digital age and clarifying the role of magazine design.

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Electronic Signature Model and Application of Security Server System using Identity Information (식별정보를 이용한 보안서버시스템의 전자서명 모델 및 응용)

  • Kim Young-Soo;Shin Seung-Jung
    • The KIPS Transactions:PartC
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    • v.12C no.2 s.98
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    • pp.169-174
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    • 2005
  • Electronic signature system is required to be used in the promotion of the e-Commerce. Because the application system for electronic signature system has inconvenience and vulnerability of security, users are reluctant to use it. Therefore, the electronic signature system should give a guarantee of convenience and security. In this paper, we propose server-based application model, which uses identity information and makes users access transparently to solve electronic signature problems. We also design and verify electronic signature system that reduces threats to security, which cause server attack by distributing the part of signature key to both server and client. The application model with lightweight server system based on the electronic signature system is expected to be used in the promotion of the e-Commerce and help to make its business more efficient and competitive.

The Investigation and Analysis of Field Condition on the Electrical Shock Hazard of Electrical Facilities Used for Temporary Power Supply at Construction Site (임시전력 건설현장에 사용되는 전기설비의 감전위험에 관한 현장실태 조사 및 분석)

  • Gil, Hyoung-Jun;Lee, Bok-Hee
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.18 no.6
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    • pp.197-204
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    • 2004
  • The temporary power installations are to be used for temporarily supplying power during work at construction sites and have a minimum of protective devices to differ from permanent installations. There are many risk factors caused by loose working environments, deterioration of installations at construction sites. To analyze risk factors of temporary power installations, the investigation and the questionnaire were carried out side by side for power receiving system patch and panel boards, and were performed by researcher, the related expert, engineer of Korea Electrical Safety Corporation all over the country. The objects were variable such as an airport, an apartment, a municipal playground As a result, there are many problems such as a bad lock, poor protection of charging department. Solvable methods are improvement of the related regulation safety education, safety check and so on. In the future, the analytical data can be applied to prevent the electrical shock at construction site, and can be used to stabilize electrical installations.

Evaluation of Discomfort Glare Indices in Office Lighting (사무실 조명에서의 Discomfort Glare 계산법 적용 및 평가)

  • Hur, Nam-Don;Kim, Hoon
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.16 no.6
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    • pp.13-21
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    • 2002
  • In the interior lighting, usually we refer to TAL and general lighting. The last one is that we generally adopt it in the interior lighting conditions. Here, glare is most important factor of them, especially in working place using VDT. Reference or development of estimation on glare has been studied in CIE, IESNA etc. and these of glare regulations now are applied differently in the interior lighting design or estimation on glare. But we have no glare regulation in detail, of course except G classification, which has limit of itself, so in my case it is impossible to apply in the interior lighting. On this paper, with some of main glare regulations in the world and our conditions in the interior lighting which are selected carefully, in an actual state it has been estimated So, it intended to blow which one is most suitable or what factors are considered of them, also show glare index which are appropriate to our interior lighting.

Development of Test Software Program and Digital Signal Processing Board for Array Module Signal Processing System (Array 검출 모듈 신호처리 시스템의 테스트 소프트웨어 프로그램 개발 및 디지털 신호처리 보드 개발)

  • Park, Geo;Kim, Young-kil;Lee, Jean
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.22 no.3
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    • pp.499-505
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    • 2018
  • Shipping and logistics safety, security system is strengthening worldwide, the development of shipping and logistics safety security core technology for national security logistics system construction has been carried out. In addition, it is necessary to localize the Array Detection System, which is a core component of the container search machine, to cope with the 100% pre-inspection of the container scheduled for 2018 in the United States. In this research, we propose a test software program developed by using TI-RTOS (Texas Instruments - Real Time Operating System) with a test digital signal processing board which is developed self development. We have developed a program that can test GPIO, SRAM, TCP/IP, and SDcard using M4 MCU. Also we propose a study on a self-developed Digital Signal Processing Board among the array detection systems that replace foreign products. We have developed a test board that can test M4 MCU and developed an X-Ray Detector Digital Signal Processing Board that combines MCU and FPGA.

Automotive Tire Pressure Sensors with Titanium Membrane (티타늄 박막을 이용한 자동차 타이어 압력센서)

  • Chae, Soo
    • Journal of Practical Engineering Education
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    • v.6 no.2
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    • pp.105-110
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    • 2014
  • In this work, mechanical characteristics of titanium diaphragm have been studied as a potential robust substrate and a diaphragm material for automotive tire pressure sensor. Lamination process techniques combined with traditional micromachining processes have been adopted as suitable fabrication technologies. To illustrate these principles, capacitive pressure sensors based on titanium diaphragm have been designed, fabricated and characterized. The fabrication process for micromachined titanium devices keeps the membrane and substrate being at the environment of 20 MPa pressure and $200^{\circ}C$ for a half hour and then subsequently cooled to $24^{\circ}C$. Each sensor uses a stainless steel substrate, a laminated titanium film as a suspended movable plate and a fixed, surface micromachined back electrode of electroplated nickel. The finite element method is adopted to investigate residual stresses formed in the process. Besides, out-of-plane deflections are calculated under pressures on the diaphragm. The sensitivity of the fabricated device is $9.45ppm\;kPa^{-1}$ with a net capacitance change of 0.18 pF over a range 0-210 kPa.

Face Recognition Evaluation of an Illumination Property of Subspace Based Feature Extractor (부분공간 기반 특징 추출기의 조명 변인에 대한 얼굴인식 성능 분석)

  • Kim, Kwang-Soo;Boo, Deok-Hee;Ahn, Jung-Ho;Kwak, Soo-Yeong;Byun, Hye-Ran
    • Journal of KIISE:Software and Applications
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    • v.34 no.7
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    • pp.681-687
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    • 2007
  • Face recognition technique is very popular for a personal information security and user identification in recent years. However, the face recognition system is very hard to be implemented due to the difficulty where change in illumination, pose and facial expression. In this paper, we consider that an illumination change causing the variety of face appearance, virtual image data is generated and added to the D-LDA which was selected as the most suitable feature extractor. A less sensitive recognition system in illumination is represented in this paper. This way that consider nature of several illumination directions generate the virtual training image data that considered an illumination effect of the directions and the change of illumination density. As result of experiences, D-LDA has a less sensitive property in an illumination through ORL, Yale University and Pohang University face database.