• 한국환경복원기술학회지
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• 제20권6호
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• pp.21-33
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• 2017

The purpose of this study is to find out that it can be provided as a basic data to increase the satisfaction with users in the placement and creation of the Green Buffer Zone. In this study, the research was started on the Green Buffer Zone in Gwanggyo new town, which was rebuilt as the zone to use according to the change of legal installation standard of the zone. The subject of this study is the Green Buffer Zone in Gwanggyo new town, which is expected to be completed in step 4 of 2016. As a result of analysing the location and use characteristics of the Green Buffer Zone, the following conclusions were made. First of all, it is categorized into two categories by Buffering / disaster prevention type and land to use adjustment type. Second, the buffer space of commercial space and housing is satisfying, but in commercial space, there is a need for a cushioning function and housing spaces require improvements in the functioning of the landscape. Third, the function of the Green Buffer Zone resets to cushioning function, disaster prevention function, landscape function, utilization function. and The installation criteria are proposed to environmental pollution, noise abatement, and planting trees, etc. Lastly, the future utilization plan considering the location and use characteristics of the Green Buffer Zone is as follows. In the planning stage, preference is given to the characteristics of use of arranging green facility. It is necessary to manage the planned facilities as much as possible by changing them if necessary. Construction stage, it restrictively reflects landscaping facilities within the Green Buffer Zone function. After stage, This study will prioritize the target areas and select necessary areas and need to make efforts to prevent indiscriminate greenery encroachment.

• 디지털산업정보학회논문지
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• 제6권1호
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• pp.105-114
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• 2010

C language is frequently used to develop application and system programs. However, programs using C language are vulnerable to buffer overflow attacks. To prevent buffer overflow, programmers have to check boundaries of buffer areas when they develop programs. But vulnerable programs frequently result from improper programming habits and mistakes of programmers. Existing researches for preventing buffer overflow attacks only inform programmers of warnings about vulnerabilities and not remove vulnerabilities in advance so that the programs still include vulnerabilities. In this paper, we propose a function translator which prevents creating programs including buffer overflow vulnerabilities. To prevent creating binary from source including vulnerabilities, the proposed translator searches vulnerable functions which cause buffer overflows, and converts them into secure functions. Accordingly, developing vulnerable programs by programmers which lack in knowledge on security can be prevented.

• 한국조경학회지
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• 제36권3호
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• pp.39-51
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• 2008

본 연구는 1980년대 도심 도로변 환경 영향 저감 기능 목적으로 조성된 완충녹지를 대상으로 다양한 도시녹지 기능 보완을 위한 완충녹지 재정비 방안 연구이다. 사례 대상지는 서울시 송파구내 송파대로와 남부순환로 도로변에 조성된 완충녹지이다. 완충녹지 주변 토지이용을 고려하여 완충녹지 기능을 재설정한 후 완충, 경관개선, 녹음기회 제공, 생태적 기능성 등을 강화할 수 있는 식재방안을 제안하였다. 송파구 녹지체계의 근간을 이루고 있는 송파대로, 남부순환로 주변 완충녹지 주변에는 고층아파트지역, 연립빌라지역, 근린상업지역, 상업업무지역, 교통시설지역, 도시부양시설지역, 학교 등 다양한 토지이용이 분포하였다. 그러나 완충녹지의 식재기능은 대부분 교목층에 양버즘나무, 은행나무, 느티나무 등이 교호식재되었고, 관목층에 개나리, 쥐똥나무 등을 열식하여 완충기능 일변도의 획일화된 패턴이었다. 현재 녹지의 다양한 기능을 발휘하지 못한 채 대부분 차량 영향 저감 기능 일변도의 획일적인 식재기능 및 식재양식으로 조성되어 있었다. 이에 보도를 중심으로 보행자의 보행환경과 경관개선 요구가 증대되고 완충녹지를 이용하고자 하는 요구를 고려하여 차량 영향 저감 기능뿐만 아니라 주변 토지이용에 따라 다양한 도시녹지로서의 기능을 충족할 수 있도록 완충녹지의 재정비 방안이 필요하였다. 송파구 도심 내 완충녹지 주변 토지이용과의 관계성과 완충녹지의 물리적 . 생태적 구조를 고려하여 완충기능뿐만 아니라 도시녹지로서 다양한 역할을 수행할 수 있도록 완충+경관기능, 경관+완충기능, 완충+녹음 기능 완충+생태기능으로 설정하였다. 그리고 다각적인 완충녹지 기능에 부합하는 식재기능, 식재종류, 식재양식, 시설물 등의 식재개선 방안을 제안하였다.

• 한국정보과학회논문지:컴퓨팅의 실제 및 레터
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• 제7권6호
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• pp.703-714
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• 2001

C 언어에서 스택에 할당된 지역변수가 넘칠 경우 주변에 위치한 제어정보가 손상을 입는다. 이러한 C언어 특성이 악의적으로 사용되어 주변의 복귀주소가 교묘하게 조작되면 그 시스템을 심각한 보안상 위험에 노출된다. 본 논문에서는 이러한 버퍼넘침을 유발하는 라이브러리 함수에 전달된 버퍼의 도메인 정보흐름을 추적하여 프로그램 작성자에게 버퍼넘침 가능성을 통지할 수 있는 정적 어셈블리 소스코드 탐색(static assembly source code scan)방안을 제안하고 그 실현 가능성 및 유의성을 펜티엄기반 리눅스 환경에서의 프로토타입 구현으로 진단한다.

• 한국조경학회지
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• 제32권2호
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• pp.25-35
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• 2004

The purpose of the study is to analyze the existing situation of the green buffer zone in the large scale industrial site and other major residential apartment areas. In this study, it is specifically intended that the planning guideline be upgraded to adopt future landuse trends and thus to suggest design criteria for management of the buffer zone. The framework of the analysis is to review the current landuse, noise reduction, ecological implications and landscape in general. Although the major function of a green buffer zone is considered to protect the residential area from various hazards of industrial, traffic, and visual environment, the situation is that most of the zones are maintained at a minimum level of services by local government. The study carried out intensively almost every type of case studied throughout the country, which implies that the management of the green buffer zone should be expanded physically enough to function for its original objectives. The study recommends that ecological management of the green buffer zone be emphasized and therefore the criteria for this purpose as well as noise issue should be developed prior to the landuse aspects. The study suggests specific guidelines for planning and design for the green buffer zone development. This study should be verified positively through the sustainable monitoring and requires nationwide and overall examination so that it may be applied to whole green spaces.

• Journal of Information Technology Applications and Management
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• 제11권2호
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• pp.179-190
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• 2004

This paper describes the design of hacking prevention systems using a smart card. It consists of two parts, i.e., PC authentication and Keyboard-buffer hacking prevention. PC authentication function is a procedure to handle the access control to the target PC. The card's serial number is used for PIN(Personal Identification Number) and is converted into hash-code by SHA-1 hash-function to verify the valid users. The Keyboard-buffer hacking prevention function converts the scan codes into the encoded forms using RSA algorithm on the Java Card, and puts them into the keyboard-buffer to protect from illegal hacking. The encoded information in the buffer is again decoded by the RSA algorithm and displayed on the screen. in this paper, we use RSA_PKCS#1 algorithm for encoding and decoding. The reason using RSA technique instead of DES or Triple-DES is for the expansion to multi-functions in the future on PKI. Moreover, in the ubiquitous computing environment, this smart card security system can be used to protect the private information from the illegal attack in any computing device anywhere. Therefore, our security system can protect PC user's information more efficiently and guarantee a legal PC access authority against any illegal attack in a very convenient way.

• 한국환경생태학회지
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• 제22권6호
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• pp.691-706
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• 2008

본 연구에서는 해안 매립도시인 안산시 철도변 완충녹지를 대상으로 완충녹지의 문제점을 분석하고, 완충녹지의 공간기능과 식재개념에 적합한 식재방안을 제시하였다. 안산시 철도별 완충녹지의 식재밀도는 $0.04{\sim}0.17$주/$m^2$ 이었고, 녹지용적계수는 $0.15{\sim}1.65m^3/m^2$로 녹량이 부족하여 완충기능이 미흡하였다. 마운딩 완충녹지의 토양경도는 $2.72{\sim}15kg/cm^2$로 식생생육에 적합하지 않았다. 완충녹지의 기능을 향상시키기 위해 야생조류 서식 측면의 생물서식기능, 주변 토지이용 측면의 도시공원기능, 식재수종 계절성 측면의 경관개선기능을 검토하였다. 완충녹지를 기능에 따라 생물서식기능의 완충녹지, 완충 및 경관개선기능의 완충녹지, 경관 및 도시공원기능의 완충녹지, 완충 및 생물서식기능의 완충녹지로 재설정하였다. 완충기능 식재방안에서는 곰솔 등을 주요종으로 선정하고, 교목종 0.4주/$m^2$, 관목종 0.5주/$m^2$로 식재밀도를 설정하였고, 경관개선 기능에서는 느티나무, 산벚나무, 살구나무 등을 주요종으로 선정하고 교목종 0.2주/$m^2$, 관목종 0.5주/$m^2$로 식재밀도를 설정하였다. 생물서식기능에서는 상수리나무, 산벚나무, 팥배나무 등을 주요종으로 선정하고, 적정 식재 밀도를 교목종 0.06주/$m^2$, 아교목종 0.1주/$m^2$, 관목종 0.8주/$m^2$로 식재밀도를 제시하였다.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2014년도 제46회 동계 정기학술대회 초록집
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• pp.318.2-318.2
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• 2014

The high contact resistance is still one of the major issues to be resolved in CdS/CdTe thin film solar cells. CdTe/Metal Schottky contact induced a high contact resistance in CdS/CdTe solar cells. It has been reported that the work function of CdTe thin film is more than 5.7 eV. There has not been a suitable back contact metal, because CdTe thin film has a high work function. In a few decades, some buffer layer was reported to improve a back contact problem. Buffer layers which are Te, $Sb_2Te_3$, $Cu_2Te$, ZnTe:Cu and so on was inserted between CdTe and metal electrode. A formed buffer layers made a tunnel junction. Hole carriers which was excited in CdTe film by light absorption was transported from CdTe to back metal electrode. In this report, we reported the variation of solar cell performance with different buffer layer at the back contact of CdTe thin film solar cell.

• Journal of Electrical Engineering and information Science
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• 제3권1호
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• pp.28-35
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• 1998

In this paper, an NxN input-buffered crosspoint packet switch which selects a Head of the Line, HOL, packet in contention randomly is analyzed with a new approach. The approach is based on both a Markov chain representation of the input buffer and the probability that a HOL packet is successfully served. The probability as a function of N is derived, and it makes it possible to express the average packet delay and the average number of packets in the buffer as a function of N. The contention resolution policy based on the occupancy of the input buffer is also presented and analyzed with this same approach and the relationship between two selection policies is analyzed in terms of the occupancy of the input buffer.

• Transactions on Electrical and Electronic Materials
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• 제14권5호
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• pp.242-245
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• 2013

Sn-doped $In_2O_3$ (ITO) thin films were prepared by radio frequency magnetron sputtering without intentional substrate heating on bare glass and $TiO_2$-deposited glass substrates to investigate the effect of a $TiO_2$ buffer layer on the electrical and optical properties of ITO films. The thicknesses of $TiO_2$ and ITO films were kept constant at 5 and 100 nm, respectively. As-deposited ITO single layer films show an optical transmittance of 75.9%, while $ITO/TiO_2$ bi-layered films show a lower transmittance of 76.1%. However, as-deposited $ITO/TiO_2$ films show a lower resistivity ($9.87{\times}10^{-4}{\Omega}cm$) than that of ITO single layer films. In addition, the work function of the ITO film is affected by the $TiO_2$ buffer layer, with the $ITO/TiO_2$ films having a higher work-function (5.0 eV) than that of the ITO single layer films. The experimental results indicate that a 5-nm-thick $TiO_2$ buffer layer on the $ITO/TiO_2$ films results in better performance than conventional ITO single layer films.