• 인터넷정보학회논문지
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• 제9권6호
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• pp.1-13
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• 2008

신뢰 컴퓨팅(Trusted Computing)은 하드웨어를 통해 컴퓨터 사용자가 제어할 수 있는 범위 이상에서 보안성을 제공하고, 컴퓨팅 장치에 대한 신뢰를 보장하는 기술을 말한다. 신뢰 컴퓨팅에서 규정한 TPM(Trusted Platform Module)이라는 전용 보안칩은 신뢰성 있는 데이터 저장 및 신뢰성 있는 플랫폼 상태 보고를 가능하게 하는 핵심 장치이다. 데이터 실링은 데이터를 암호화할 때 특정한 플랫폼의 상태와 연관시켜 기존의 암호화를 통한 기밀성 보호를 한층 더 강화한 강력한 보안 기법이다. 데이터 실링에는 이진 해쉬 값 기반의 플랫폼 구성 상태를 직접 활용하는 방식과 플랫폼의 제공 성질(property)을 실링에 활용하는 방식이 있다. 본 논문에서는 Dijkstra가 제안한 최소 전제조건 개념을 이용한 새로운 성질 기반의 데이터 실링 및 해제 프로토콜을 제안한다. 제안하는 프로토콜은 실링 할 때와 동일한 성질에서 실링 해제를 가능하게 하여 정상적 시스템 업데이트 시 실링 해제가 가능하도록 한다. 그러면서 기존 성질 기반 실링 방식의 문제점인 제3자 신뢰 기관의 비현실성 및 플랫폼의 프라이버시 노출 문제를 해결하였다. 본 논문은 제안 프로토콜의 보안성을 분석적으로 제시하였으며, Strasser가 개발한 소프트웨어 TPM 에뮬레이터 환경에서 프로토콜을 구현하여 그 동작성을 실험적으로 입증하였다. 제안 기법은 데스크탑 PC는 물론 무선 이동 네트워크 상의 PDA나 스마트 폰 플랫폼에도 적용 가능하다.

• International Journal of Internet, Broadcasting and Communication
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• 제11권4호
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• pp.18-25
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• 2019

The public data portal provides various public data created by the government in the form of files and open APIs. In order to increase the usability of public open data, a variety of information should be provided to users and should be convenient to use for users. This requires the structured data design plan of the public data. In this paper, we propose a data design method to improve the usability of the Seoul subway public data. For the study, we first identify some properties of the current subway public data and then classify the data based on these properties. The properties used as classification criteria are stored properties, derived properties, static properties, and dynamic properties. We also analyze the limitations of current data for each property. Based on this analysis, we classify currently used subway public data into code entities, base entities, and history entities and present the improved design of entities according to this classification. In addition, we propose data retrieval functions to increase the utilization of the data. If the data is designed according to the proposed design of this paper, it will be possible to solve the problem of duplication and inconsistency of the data currently used and to implement more structural data. As a result, it can provide more functions for users, which is the basis for increasing usability of subway public data.

• 호남수학학술지
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• 제31권3호
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• pp.267-278
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• 2009

As a survey-type article, the paper reviews the recent results on a (generalized) universal covering space in digital covering theory. The recent paper [19] established the generalized universal (2, k)-covering property which improves the universal (2, k)-covering property of [3]. In algebraic topology it is well-known that a simply connected and locally path connected covering space is a universal covering space. Unlike this property, in digital covering theory we can propose that a generalized universal covering space has its intrinsic feature. This property can be useful in classifying digital covering spaces and in studying a shortest k-path problem in data structure.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2006년도 춘계학술대회 논문집
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• pp.535-536
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• 2006

Researches about micro technology travel lively in these days. Such many researches are concentrated in the field of materials and a process field. But properties of micro materials should be known to give results of research developed into still more. In these various material properties, reliability data such as mechanical, optical, thermal property, etc is the basic property. In this paper, it is measured that is material properties of main BLU(Back Light Unit) components in LCD(Liquid Crystal Display). The pattern shape of prism sheet, diffuser film and reflective plate are measured by variable 3D scanning equipments. It is researched which is the method to measure an optimal 3D pattern shape in each components.

• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2003년도 춘계종합학술대회논문집
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• pp.291-297
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• 2003

정보통신기술의 발전으로 과학기술정보의 다양화, 심층화, 고급화 요구가 증대되고 있으며, 미래 지향적 산업을 위한 과학기술정보기반 구축의 필요성이 날로 커지고 있다. 선진국들은 과학기술분야의 문헌데이터베이스 뿐만 아니라 물성데이터베이스도 개발하여 인터넷을 통해 서비스 하고 있다. 국내에서는 문헌데이터베이스의 구축 및 유통은 정착되어 가는 단계이나 물성데이터베이스에 대한 연구는 매우 미흡하다. 따라서 과학기술분야 정보기반 구축을 위해서도 물성데이터베이스 개발 및 연구가 절실히 필요하다. 본 연구에서는 미래 첨단산업분야인 초전도 재료물성 데이터베이스를 개발하였다. 초전도체 산화물의 열적, 기계적 특성 및 초전도 물성 등에 대한 데이터가 제공되며, 서지정보, 물질정보, 물성정보로 나누어 데이터베이스를 설계하였다.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 2005년도 춘계학술대회 논문집
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• pp.245-248
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• 2005

This paper is concerned with manufacturing technology of thin foil tensile specimen using CIP(Cold Isostatic Press) and measurement of precision mechanical property. This thin foil tensile specimen manufacturing technology is a method that can make a metal thin foil specimen for micro tensile testing. We can get a burr free micro metallic thin foil specimen using this technology. For testing mechanical property of this micro thin foil, we use a nano scale material testing machine that was developed by KITECH. In this paper, micro tensile specimens of nickel and copper thin foil are fabricated with CIP and precision mechanical properties of these materials could be measured. We will expect that precision mechanical property of micro/nano material and component. Micro and Nano mechanical property can be measured using this technology and mechanical property data base of micro/nano material and component can be constructed.

• 한국실내디자인학회논문집
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• 제20권3호
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• pp.135-142
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• 2011

There occurs subtle shaking in our eyes while in looking at objects and this study sets up the standard of reconciliation from the property of observation and organizes the property of data reconciliation by the observation range to secure the feasibility of reconciliation range and method of the original data obtained from observation experiment and its analysis process. The results from above study can be concluded as in the followings: First, it made clear the process to exclude eye blink and data out of image range from the original data so to set up the range of available data. Second, on the basis of existing theory, it was possible to define the minimum attention time as 0.1 second (3 times of observation) and the visual understanding time of space as 0.3 second (9 times of observation) in the study on the property of observation, and this definition of observation time of sight fixation becomes an important indicator in the analysis of observation data. Third, based on the observation theory of continuity securing and attention, it was able to arrange the standard of reconciliation by carrying out reconciliation works only when fixed data with more than three times of observation showed consecutively before and behind the data with intermittent movements. Fourth, In the sector whether visual understanding occurred (more than 9 times), it increased by 12% for the frequency of observation and by 7.8% for the times of observation compared with the ones before the reconciliation. These results showed to have a constant change by subjects so that it was able to arrange a foundation to secure objective data in the analysis of the observation range and its extent.

• 한국진공학회지
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• 제1권3호
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• pp.371-375
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• 1992

Low cost, PC controlled electrical property measurement systems were constructed to study thin film characteristics such as ; I-V, C-V, C-t, and low current. In addition, a GPIB card and C language program for data control and analysis were made for this study.

• 한국세라믹학회지
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• 제36권10호
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• pp.1022-1034
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• 1999

A relation between composition and properties of Na2O-Al2O3-SiO2 glasses was investigated with application of the extreme vertical design. Properties investigated in this study include glass transition temperature density refractive index thermal expansion electrical conductivity bending strength and hardness, Most of the quadratic models fitted on property data were statistically significant. The properties estimated from the fitted equation agreed well with the measured properties. The estimated properties were compared with those reported by other investigators. Additional composition except for those of extreme vertices were needed to yield a slightly better result for the simple system such as a temary system. In addition an optimal composition on each property could be calculated by using optimization technique on result obtained from the fitted quadratic models.

• 한국멀티미디어학회논문지
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• 제17권12호
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• pp.1521-1527
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• 2014

This paper presents to design User eXperience(UX) of anthropomorphic animal characters search system (hereinafter, AACSS) for efficient user search. To this end, meta data were utilized herein to elevate the search efficiency of multimedia information and text information. Anthropomorphic animal characters require the human elements and the animal elements, thus this paper extracted the key elements of meta data as below; phenotypic element in animal system classification (Morphologic property elements, Ecological property elements, Behavioral property elements), emotion classification, which is the trait of personification and the Step of Anthropomorphic Animal Characters.