• Journal of the Society of Disaster Information
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• v.13 no.3
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• pp.322-331
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• 2017

This study proposed subway construction information classification system based on civil engineering information classification system proposed by Korea Institute of Construction Technology. Also, Based on this criterion, This study established data modeling for NAS operating system Composed of construction information classification system - network - operation and presented an relational database integrated model. The data modeling method proposed in this study can be applied to other civil engineering facilities, so it can be operated as scientific NAS.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.19 no.8
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• pp.1965-1972
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• 2015

The Missile Flight Test Launch Control System is to operate in conjunction with the Fire Control System during flight test to guided weapons. Also, this is a system for the test control and situation monitoring depending on the type of guided weapons and testing purposes. Message structure, communication protocols, such as data types for interworking with the fire control system and the Missile Flight Test Launch Control System are defined in the Launch Control ICD(Interface Control Document). ICD are composed differently of each guided weapons system and each test object. Previously, in order to interwork with the Fire Control System, the interlocking software was developed, which had a variety of problems. Therefore, we developed a new parsing algorithm in order to recognize the variety of Launch Control ICD and verified that the algorithm operates normally by checking transmitting and receiving various message in conjunction with the fire control system.

• Environmental and Resource Economics Review
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• v.26 no.2
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• pp.257-286
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• 2017

This paper estimates the effects of imaginary repeated increases in excise duties on fuel oil consumption and on their income redistribution according to changes in consumer price index, if the inflation indexation system was introduced right after the second Energy Tax Reform ended in July, 2007 in Korea. In fact, nominal excise rates have not been adjusted since 2007. As a result, the real excise rates on fuel oils have been diminished inversely proportional to the consumer price index. Own- and cross-price elasticities of fuel oils such as gasoline and diesel oil are estimated under the general equilibrium framework based on the linear expenditure system. Counterfactual analyses through microsimulation in a static model are adopted to estimate the effects of introducing inflation indexation into the fuel tax in 2007 when the second Energy Tax reform ended on the fuel consumption and income redistribution in 2014. Microsimulations suggest that its introduction could have reduced the consumption of gasoline and diesel oil by 8.8% and 5.4%, respectively, ending up with increased excise revenue by 11.9%. The revenue increase in spite of decreased consumption is mainly because their demands are price inelastic. It could also have increased positive income redistributive effect by 0.01%p (from 0.12% to 0.13%), which is measured in terms of percentage decrease in Gini coefficient. In other words, the fuel excise on the two fuel oils decreased by 0.13% the Gini coefficient of before and after fuel tax income in 2014. This implies that the inflation indexation could have enlarged the income redistributive effect up to 0.13% in 2014, if it is introduced in 2007.

• Proceedings of the Korean Information Science Society Conference
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• 2012.06c
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• pp.239-241
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• 2012

우리 군은 미래전을 대비하기 위해 각종 전술 응용정보체계의 막힘없는 전송과 통신망간 연동 요구를 충족시키고 미래 전장을 주도할 통신체계 구축을 목표로 전술정보통신체계(TICN) 개발을 추진 중이다. Ad-hoc 네트워크 기술을 사용하는 전술정보통신체계의 부체계인 전투무선체계는 전장 환경에서 운영되는 특수성으로 인해 기존의 전통적인 플랫한 Ad-hoc 네트워크와는 차별화된 계층형 Ad-hoc 네트워크 구조를 가진다. 또한 Ad-hoc 네트워크를 운용하는 환경이 보안성이 극도로 요구되는 전장 환경임을 고려할 때 군 작전의 성공적인 목표 달성을 위한 보안대책은 반드시 필요하다. 특히 전장상황 하에서 유통될 각종 민감 정보들에 대한 기밀성, 무결성 등을 보장하기 위해 정당한 권한을 가진 노드들만이 네트워크에 참여할 수 있는 보안 매커니즘이 적용되어야 하며, 이를 위해선 효율적인 키 관리 기법을 적용해야 한다. 본 논문에서는 비밀키, 노드위치, 해시인증 등의 정보를 이용한 3단계 인증절차 적용으로 Ad-hoc 네트워크 참여 노드의 인증을 강화하고, 통신환경에 따라 3가지 비밀키를 구분 사용하여 계층형 Ad-hoc 네트워크 구조에서 기밀성 보장을 강화하기 위한 키 관리 기법을 제안한다.

• Journal of the Korea Society for Simulation
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• v.19 no.2
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• pp.51-62
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• 2010

Modeling and Simulation techniques are useful to construct executable battlefields and forces on computers, and have been utilized to analyze effectiveness of weapon systems in the computerized war environment. However, most weapon simulations so far have exhibited low reusability and extensibility, since they have been developed for specific simulation objectives with different structures and simulation engines. In this paper, we identify requirements for defense modeling and simulation activities and propose a simulation engine to support the identified requirements. We define the software architecture of the proposed engine, in a way to efficiently provide usability, component-based reusability, interoperability, and reuse-based development.

• Journal of the Korean Society for information Management
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• v.19 no.2
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• pp.159-179
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• 2002

The Dublin Core, MARC. IFLA-FRBR user communities are developing international standards for describing textual, physical and audiovisual resources to enable their resources discovery over the Internet. Therefore the metadata interoperability Problem has been exacerbated by the need for more complex metadata descriptions. In this paper we propose a new mechanism for metadata interoperability based on the new semantic web applications : IFLA-FRBR framework, INDECS metadata and an event-aware ABC models. This study introduces a new approach method which is essential to the generation of interoperable metadata descriptions, particularly in the context of multimedia contents.

• KIISE Transactions on Computing Practices
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• v.24 no.2
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• pp.67-76
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• 2018

BLE (Bluetooth Low Energy) has been extensively used for communication between mobile applications and wearable devices in IoT (Internet of Things). In developing Android applications, wearable devices, on which the applications can run, should be available because the existing Android SDK does not support any BLE emulation facility. In this study, we have designed and implemented the first Android BLE emulator. Using this, we are able to develop and test BLE-based Android applications even when without wearable devices. We have also proposed an automatic generation method of Android BLE scenarios based on graph model. We have shown that the method is useful for systematically testing BLE application protocols by running the generated scenarios on the Android BLE emulator.

• Journal of Korea Multimedia Society
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• v.8 no.1
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• pp.119-127
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• 2005

Each university in Korea has connected its campus network to outer network with a variety methods since every year KREN adopted an open bid in selecting a network service company. In particular many universities connected two or more outer networks have faced more complex decision problems about their network operations due to the intricacy of the networks. So, those university needs the system which helps the managers to select the optimum operating method for their campus networks. In this paper, campus network traffic efficiency based on utilization was analyzed using the manager's answers to the questions for traffic management. And, by the result of analysis, the link strategy to outer networks was suggested for the universities running simultaneously two outer networks.

• Journal of Teachers' Pension
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• v.5
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• pp.243-282
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• 2020

본 연구의 목적은 기준소득월액 상·하한 기준을 체계적이고 심도 있게 분석하여 실효성 있는 개선방안을 제시하는데 있다. 기준소득월액 하한 관련 주요 분석결과는 다음과 같다. 첫째, 현행 사학연금 기준소득월액 하한 수준은 낮은 편이다. 둘째, 기준소득월액 하한은 학교급별, 직능별로 5개의 하한선으로 구분하여 차등화하고 있어 사학연금 가입자간 부담금 및 급여의 형평성 문제가 발생하고 있다. 셋째, 세분화된 하한선으로 인해 사학연금 가입자들의 수용성(수요자) 측면의 문제와 불필요한 행정비용이 발생한다. 넷째, 하한의 연동방식이 부재하다. 또한 기준소득월액 상한 관련 주요 분석결과는 다음과 같다. 첫째, 기준소득월액 상한 기준 중 퇴직연금 등 연금급여 산정 시의 수준은 비교적 적절한 것으로 보이나, 일시금 산정 시의 수준은 다소 높은 것으로 판단된다. 둘째, 기준소득월액 상한은 연금급여 산정 시와 일시금 산정 시 기준으로 이원화 되어 있고, 일시금 산정 시 기준은 다시 교원과 직원으로 구분되어 있어 가입자간 부담금 및 급여의 형평성 문제, 가입자의 수용성 문제 및 행정적 비효율성 문제가 존재한다. 셋째, 상한의 연동방식 변경에 대한 검토가 필요하다. 이에 본 연구에서는 현행 하한선의 일원화 및 국공립 유치원·초·중·고 교사 1호봉인 165만 6천원까지 단계적으로 상향조정하는 방안, 현행 차등화된 하한선의 일원화와 하한 수준의 인상을 별도로 추진하기 보다는 동시에 추진하는 방안의 필요성, 이원화되어 있는 상한기준을 통합하여 일원화하는 방안의 필요성, 상한 및 하한의 연동방식으로 사학연금 전체 가입자 평균기준소득월액 변동률을 고려하는 방안 등을 제시하였다.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.12 no.1
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• pp.11-20
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• 2002

In 1998, A. Young and M. Yung proposed the auto-recovery auto-certificate cryptosystem in public key infrastructure. We propose the new recoverable cryptosystem in public key infrastructure which is designed with the concept of A. Young et al's auto-recovery auto-certificate cryptosystem. It has the private/public key pairs of the user and the master private/public key pairs of the escrow authority. It is based on RSA cryptosystem and has efficiency and security.