• 대한산업공학회지
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• 제26권4호
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• pp.336-344
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• 2000

The soft handoffs between two adjacent MSC's should be employed to support the calls requesting handoffs to an MSC while minimizing the undesirable ping pong phenomenon of back-and-forth handoffs between two adjacent cells in conventional hard handoffs. In this paper, the soft handoff scheme between two MSC's is considered using the trunk between the packet routers for the two MSC's. The trunk network is proposed to support the inter-MSC soft handoff scheme in the service area with many MSC's. The probability that a soft handoff to an adjacent MSC will be blocked due to the shortage of the trunk capacity is derived.

• 한국정보과학회:학술대회논문집
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• 한국정보과학회 1999년도 가을 학술발표논문집 Vol.26 No.2 (1)
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• pp.560-562
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• 1999

프로그램 슬라이싱은 프로그램의 특정 위치에서 변수들의 값에 영향을 주는 문장을 추출하는 방법이다. 프로그램 슬라이싱의 유용성은 디버깅, 최적화, 프로그램 유지보수, 테스팅, 재사용 부품 추출 그리고 프로그램 이해를 포함하는 다른 응용 분야에 널리 알려져 있다. 본 논문은 C언어에서의 함수 호출이 존재하는 모듈간 프로그램 슬라이싱에 관한 연구이다. 기존의 모듈간 슬라이싱 알고리즘들은 함수의 호출 문맥 설명에 실패하거나 문장 기반 그래프를 사용함으로써 정확한 슬라이스 생성에 실패한다. 본 논문에서는 기존 방법들의 문제점을 지적하고, 시스템 정보 흐름 그래프 (System Information Flow Graph)를 이용하여 정확하고 수행 가능한 모듈간 슬라이스 생성 방법을 제안한다.

• Journal of Information Processing Systems
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• 제15권3호
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• pp.457-463
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• 2019

The blockchain and crypto currency has become one of the most essential components of a communication network in the recent years. Through communication networking, we browse the internet, make VoIP phone calls, have video conferences and check e-mails via computers. A lot of researches are being conducting to address the blockchain and crypto currency challenges in communication networking and provide corresponding solutions. In this paper, a diverse kind of novel research works in terms of mechanisms, techniques, architectures, and frameworks have been proposed to provide possible solutions against the existing challenges in the communication networking. Such novel research works involve thermal load capacity techniques, intelligent sensing mechanism, secure cloud computing system communication algorithm for wearable healthcare systems, sentiment analysis, optimized resources.

• 무역학회지
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• 제44권6호
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• pp.55-67
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• 2019

This study investigate the concept and type of Korea's trade governance by theories related to network governance. Korea's domestic trade policy-building system a 'network trade governance' utilizing Minister for Trade as a network administrative organization. This governance has four major rade stakeholders: G(Government), I(Industry), A(Academia), and C(Civil groups). Korea has five types of committees for internal consultation between domestic stakeholders, all G·I·A·C groups. Korea's trade governance can be if it fixes its administrative redundancy, communication formality, stakeholder exclusiveness. This topic calls for further research such as social network analysis as well as international comparison analysis.

• Nuclear Engineering and Technology
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• 제55권10호
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• pp.3787-3800
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• 2023

Reactivity Initiated Accident (RIA) scenarios require special attention using advanced simulation techniques due to their complexity and importance for nuclear power plant (NPP) safety. While the conservative approach has traditionally been used for safety analysis, it may lead to unrealistic results which calls for the use of best estimate plus uncertainty (BEPU) approach, especially with the current advances in computational power which makes the BEPU analysis feasible. In this work an Uncontrolled Control Element Assembly (CEA) Withdrawal at Full Power accident scenario is analyzed using the BEPU approach by loosely coupling the thermal hydraulics best-estimate system code (RELAP5/SCDAPSIM/MOD3.4) to the statistical analysis software (DAKOTA) using a Python interface. Results from the BEPU analysis indicate that a realistic treatment of the accident scenario yields a larger safety margin and is therefore encouraged for accident analysis as it may enable more economic and flexible operation.

• 한국실내디자인학회논문집
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• 제21권1호
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• pp.68-77
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• 2012

Appreciating the aspect of modem architecture requires not only the comprehension of the nature of design and architects' ways of thinking and expression but also observers' views on buildings and their perceptive/cognitive stages. This calls for an in-depth study on the "system of phenomenological perceptions" that works as a new architectural experience system. The system of phenomenological perceptions makes it possible to specify the individual process of understanding architecture, that is, hands-on experiences, participations, feelings, perceptions, and cognition. The value of user experience and cognition has been emphasized by philosophical and aesthetical concepts as well. Therefore, in order to better appreciate the modern architecture, this study suggests theoretical consideration to "orientation and event" that are crucial elements in understanding a phenomenological view and materializing actual space formation. This offers the cognitive system with which we analyze modem architecture and comprehensive expressional methods. In other words, this study contemplates the system of phenomenological perceptions from an existential spatial perspective by structurizing the system of the orientation and the event in order to segmentalize users' current locations, potential directions, the relations with spaces, continual vie'wpoints as well as buildings' functions and interior and exterior division. The system of phenomenological perceptions helps understand and systemize modern architecture through a system based on relations between sensation, perception, cognition, sensitivity, and rationality. This creates a new cognitive system employing the concept of the orientation and the event, which is different from a normal cognitive system basing on the sense of vision. When observers appreciate space, they tend to relate the space to a certain event and to remember their experiences in it. During the process, they draw borders of the space in which the event takes place and give shape to their experiences including actions, movements, cognition and sensation. The process leads to the formation of "placeness," and here, the concept of the orientation comes in as the location and the center of the placeness. This study proves that a determined orientation coupled with individual experience and events settles the place ness; detailed elements in the cognitive system have close relations with one another; the orientation, actions, events, and places are the factors that materialize observers' architectural experience.

• 융합보안논문지
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• 제20권2호
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• pp.123-135
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• 2020

2016년 알파고의 대국 이후, 여러 산업 분야에서 인공지능 적용에 대한 요구가 많아지고 있고 그와 관련된 연구가 활발하게 진행되고 있다. 군사 분야도 마찬가지 인데, 지금까지 인공지능이 적용된 무기체계가 없었기 때문에 그 구현에 대한 노력이 도전으로 작용하고 있다. 한편 알파고를 이긴 알파고 제로는 인공지능의 자기학습에 의한 데이터 기반 접근법이 기존의 사람에 의한 지식 기반 접근법보다 좋은 결과를 도출할 수 있다는 결과를 보여주었다. 본 논문에서는 이러한 점을 착안하여, 알파고 제로의 기반이 되는 강화학습을 함정전투체계 또는 전투관리체계에 적용하는 것을 제안한다. 이는 일정한 승률을 보이는 최적의 전술적 결과물이 사용자 즉, 함장과 작전요원에게 권고할 수 있도록 하는 인공지능 어플리케이션을 함정전투체계에 적용하는 방법이다. 이를 위해 전투성능에 관한 체계의 정의, 함정전투체계 설계 방안과 실 체계와의 Mapping, 훈련체계가 현 작전 수행에 원활히 적용될 수 있는 방안을 더불어 제시한다.

• 한국인터넷방송통신학회논문지
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• 제10권1호
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• pp.145-150
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• 2010

본 논문은 무선인지시스템이 갖는 얼랑 용량을 분석하였다. 무선 인지 사용자들의 신규 호 및 스펙트럼 핸드오프를 요청하는 호들에 대해 버퍼를 사용하는 무선 자원 관리 기법을 고려하였으며, 성능 분석을 위해 마르코프(Markov) 모델을 사용하였다. 이를 기반으로 무선 인지 시스템에서 기사용자 및 무선 인지 사용자가 겪는 호 차단(call blocking) 확률, 강제 호 종료(forced call termination) 확률, 호 서비스 비완료(non-completion) 확률 등을 유도하였다. 시뮬레이션을 통해 버퍼의 크기가 증가함에 따라, 인지 무선 시스템에서 수용될 수 있는 얼랑 용량 또한 증가함을 보였다.

• International journal of advanced smart convergence
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• 제8권4호
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• pp.188-193
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• 2019

This paper is about environment-based low-code and no-code execution platform and execution method that combines hybrid and native apps. In detail, this paper describes the Low-Code/No-Code execution structure that combines the advantages of hybrid and native apps. It supports the iPhone and Android phones simultaneously, supports various templates, and avoids developer-oriented development methods based on the production process of coding-free apps and the produced apps play the role of Java virtual machine (VM). The Low-Code /No-Code (LCNC) development platform is a visual integrated development environment that allows non-technical developers to drag and drop application components to develop mobile or web applications. It provides the functions to manage dependencies that are packaged into small modules such as widgets and dynamically loads when needed, to apply model-view-controller (MVC) pattern, and to handle document object model (DOM). In the Low-Code/No-Code system, the widget calls the AppOS API provided by the UCMS platform to deliver the necessary requests to AppOS. The AppOS API provides authentication/authorization, online to offline (O2O), commerce, messaging, social publishing, and vision. It includes providing the functionality of vision.

• 한국유체기계학회 논문집
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• 제19권6호
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• pp.26-33
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• 2016

Combined heat and power (CHP) system is one of the power generation system which can generate both electricity and heat. Generally, mid-size and big-size CHP plant in Korea generate electricity from gas turbine and steam turbine, then supply heat from exhaust gas. Actually, CHP can supply heat using district heater which is located at low pressure turbine exit or inlet. When the district heater locates after low pressure turbine, which called back pressure type turbine, there need neither condenser nor mode change operating control logic. When the district heater locates in front of low pressure turbine or uses low pressure turbine extraction steam flow, which calls condensing type turbine, which kind of turbine requires condenser. In this case, mode change operation methods are used for generating maximum electricity or maximum heat according to demanding the seasonal electricity and heat.