• ETRI Journal
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• 제19권3호
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• pp.186-201
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• 1997

In this paper, a home location register (HLR) for CDMA mobile communication system (CMS) is introduced. It stores the mobile station (MS) subscribers locations and supplementary service information. Call processing procedures for HLR are developed to receive and store subscriber's location coming from mobile exchange (MX) during the location registration, and to transfer subscriber's location and supplementary service information to the MX during the mobile-terminated call setup. For fast call processing by increasing database access speed, a memory-resident database management system is devised. For Easy and secure HLR operation, administration and maintenance functions and overload control mechanisms are implemented. Designed HLR hardware platform is expandable and flexible enough to reallocated software blocks to any subsystems within the platform. It is configurable according to the size of subscribers. An authentication center (AC) is developed on the same platform. It screens the qualified MS from the unqualified. The calls to and from the unqualified MS are rejected in CMS. To authenticate the MS, the AC generates a new authentication parameter called "AUTHR" using shared secret data (SSD) and compared it with the other AUTHR received from the MS. The MC also generates and stores seed keys called "A-keys" which are used to generate SSDs. The HLR requirements, the AC requirements, software architecture, hardware platform, and test results are discussed.

• 한국실내디자인학회논문집
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• 제37호
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• pp.3-11
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• 2003

The study Is Intended to investigate and analyze the system and practice that have been applied to Interior Architecture, comparing with a number of similar foreign cases, in an attempt to seek the way toward its development as well as to come up with the solution for enhancing the competitiveness, thereby making a recommendation on how to create the desirable work environment of Interior Architecture down the road. The conclusion and recommendation we have made is highlighted as follow. Among the practical or procedural challenges in the process of improving work environment of Interior Architecture, development of current national technical qualification system in a way of further detailing the categories of Ki-sul-sa(highest engineer grade) or Ki-neung-jang(highest technician grade) as part of measures aimed at gradual approaching for improvement of design fees and rates or supervision fees will be very crucial, that calls for close coordination with the Ministry of Labor and Human Resources Development Service of Korea. In a bid to upgrade the Interior Architecture to become the part of knowledge-based industry, amendment to Korean Standard Industrial Classification along with Standard Classification of Occupations and Academic Classification will be essential, and moreover with the attitude of reflection and self-improvement, the endeavors to be able to deal with the revision of existing laws and regulations in a consistent way and manner, by forming a joint committee among the three Interior Architecture-related organizations(KOSID, ICC, KlID), will be more than important.

• 한국정보처리학회논문지
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• 제6권7호
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• pp.1941-1954
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• 1999

본 논문은 ITU-T 통신 처리 시스템용 프로그래밍 언어 CHILL에서 제공되는 병행처리 기능을 적용하기 위한 CHILL 실행시간 지원 시스템(CRS : CHILL Run-time support System)의 설계 및 구현에 관한 연구이다. CHILL은 다른 병행 프로그래밍 언어에 비해 다양한 병행처리 기능들을 제공하고 있기 때문에, CRS의 설계는 병행처리 기능의 인터페이스 규격을 설계한다. CHILL의 병행처리 프리미티브는 프로시듀어 호출 형식으로 사용하도록 라이브러리 방식을 사용하며, CHILL 프로세스의 실행을 병행적으로 제어하기 위해 CHILL 프로그램 구동 루팀 및 문맥 교환부와 CHILL 프로세스 제어부를 구현한다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제16권9호
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• pp.3087-3103
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• 2022

Nearest neighbor query in location-based services has become a popular application. Aiming at the shortcomings of the privacy protection algorithms of traditional ciphertext nearest neighbor query having the high system overhead because of the usage of the double Hilbert curves and having the inaccurate query results in some special circumstances, a privacy protection algorithm of ciphertext nearest neighbor query which is based on the single Hilbert curve has been proposed. This algorithm uses a single Hilbert curve to transform the two-dimensional coordinates of the points of interest into Hilbert values, and then encrypts them by the order preserving encryption scheme to obtain the one-dimensional ciphertext data which can be compared in numerical size. Then stores the points of interest as elements composed of index value and the ciphertext of the other information about the points of interest on the server-side database. When the user needs to use the nearest neighbor query, firstly calls the approximate nearest neighbor query algorithm proposed in this paper to query on the server-side database, and then obtains the approximate nearest neighbor query results. After that, the accurate nearest neighbor query result can be obtained by calling the precision processing algorithm proposed in this paper. The experimental results show that this privacy protection algorithm of ciphertext nearest neighbor query which is based on the single Hilbert curve is not only feasible, but also optimizes the system overhead and the accuracy of ciphertext nearest neighbor query result.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2021년도 추계학술대회
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• pp.439-441
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• 2021

매년 고령화 사회로 인해 욕창환자가 증가하고 있으며 COVID-19의 팬데믹 상황으로 간호인의 업무 부하로 욕창 관리의 중요성이 대두되고 있다. 욕창은 부동자세로 인해 궤양이 생기는 질병으로 간호인이 주기적으로 체위변경을 해줘야 하기에 간호 부담이 큰 질병이다. 이에 본 연구에서는 인공지능이 욕창 유발 위험을 검출하고 호발 현황을 실시간 모니터링 해줌으로써 간호인의 업무 부담을 줄일 수 있는 시스템을 제시한다. 본 시스템을 통하여 간호인의 욕창 간호의 어려움을 해소시켜 간호 업무의 증대할수 있을 것이다.

• ETRI Journal
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• 제36권5호
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• pp.865-875
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• 2014

Voice phishing (vishing) uses social engineering, based on people's trust in telephone services, to trick people into divulging financial data or transferring money to a scammer. In a vishing attack, a scammer often modifies the telephone number that appears on the victim's phone to mislead the victim into believing that the phone call is coming from a trusted source, since people typically judge a caller's legitimacy by the displayed phone number. We propose a system named iVisher for detecting a concealed incoming number (that is, caller ID) in Session Initiation Protocol-based Voice-over-Internet Protocol initiated phone calls. Our results demonstrate that iVisher is capable of detecting a concealed caller ID without significantly impacting upon the overall call setup time.

• Journal of Ginseng Research
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• 제13권2호
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• pp.223-228
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• 1989

Natural killer (NK) cells are a heteroguneous subpopulation of lymphocytes that spontaneously exhibit cytotoxic activity against various virus-Infected and neoplastic target cells without prior exposure to a specific antigen. It was thought that NK calls play an important role in immunosurvrillanre against viral agents and tumors, and in prevention of metastasis. Recently, several reports have indicated evidence that ginseng extracts show a significant stimulatory effect on the humoral and cellular immune responses. This evidence gives support to the suggestion that the anticarcinogenic effect of ginseng may be due to the effect of ginseng on the immunological system. Treatment with total, diol, and triol saponin resulted in an increase in NK cytotoxic activity, but no enhancement of the lytic activity due to the natural killer cytotoxic factor (NKCF). Therefore, these results suggest that the augmentation of NK activity by ginseng saponin fractions may not be due to the activation of NKCF lytic activity.

• 영어어문교육
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• 제17권2호
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• pp.59-77
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• 2011

In recent years, as many native English speakers are working in Asia to as English teachers, team teaching with local teachers has been commonly implemented within the Korean EFL classroom. Using qualitative case studies, this paper aims to explore native English-speaking teachers' (NESTs) perceptions of team teaching and their challenges at different secondary Korean schools. The study documents the challenges faced by three foreign teachers embedded in intercultural teaching teams. The data shows that common challenges include vague role distribution among teachers, problems presented by mixed levels of students, large classes, and students' low valuation during foreign teacher's classes, which go ungraded. The study calls for serious governmental efforts to change these fundamental problems and closely examine local factors that strongly affect team teaching practices before initiating a system of importing foreign teachers without proper preparation.

• 한국국방경영분석학회지
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• 제17권2호
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• pp.123-134
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• 1991

one of the problems the users of DPS-6/45 used to face in the course of having access to work stations was that a telephone call has to be made manually every time to have receiver's modem on or off, and naturally it meant the waste of manpower as well as of time. A program has been worked out to automatically operate and control. utilizing the system clock within the main computer (DPS-6/45), the on/off switch on the modems. It has resulted in; 1) promotion in operability of the main computer, DPS-6/45 2) prevention of unnecessary telephone calls 3) curtailment of expenditure and manpower

• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2010년도 한국컴퓨터종합학술대회논문집 Vol.37 No.2(A)
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• pp.90-94
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• 2010

최근 많은 보안 공격 도구들은 커널 레벨에서 동작하도록 설계 되고 있다. 악의적인 행동이 시스템 모니터링 프로그램과 같은 권한 레벨에서 이루어지기 때문에 공격 도구들은 공격 대상으로부터 자신의 존재를 숨기고 활동할 수 있다. 이러한 커널 레벨 악성코드들에 대한 대처 방법으로 가상화 기술을 이용하는 더 높은 권한 레벨을 가진 가상머신모니터(VMM)에서의 시스템 모니터링 방법이 소개 되었다. 그러나 많은 가상화 기반 모니터링 도구들이 주로 페이지 폴트 예외를 이용하여 시스템 콜 호출을 감시하기 때문에 신뢰성이 떨어지고 확장 페이지 테이블 (EPT) 과 같은 최신 하드웨어 가상화 기술 지원을 받지 못한다. 이에 본 논문에서는 일반 보호 예외를 이용하는 새로운 시스템 콜 인터셉트 기법을 제안함으로써 기존 기법의 기술적 한계를 극복하고 신뢰도 높은 모니터링 기법을 제공하고자 한다. 또 해당 기법의 구체적 구현 방법을 서술하고 구현 결과를 실험함으로서 제안 기법을 검증한다.