• 한국HCI학회:학술대회논문집
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• 2006.02a
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• pp.824-829
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• 2006

한정된 자원을 사용할 수 있는 게임 AI 분야에서는 시스템 자원을 적절하게 활용하여 현실감을 극대화 시키려는 노력이 중요한 이슈이며, 3D 게임에서 캐릭터들의 자연스러운 경로 탐색은 현실성을 높이는 중요한 척도 중 하나이다. 기존 연구에서는 주로 정적인 지형, 객체들을 적절하게 회피하는 경로에 대한 연구가 많이 진행되었다. 그러나 최근 널리 이용되고 있는 다중사용자가 접속하는 온라인 RPG 게임에서는 기존 방법을 그대로 적용하기에 많은 연산량이 필요한 문제점이 있다. 본 논문에서는 네비게이션 메시(Navigation Mesh) 기반으로 최적화된 A*, 그리고 밀개(Repulsors)의 방법을 통하여 동적인 환경에서 자연스러운 경로탐색을 수행하며 3D 게임에 적용 가능한 연산량을 충족하는 경로탐색 시스템을 제안하였다.

• Proceedings of the Korean Society of Marine Engineers Conference
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• 2005.11a
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• pp.206-207
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• 2005

해상에서 인터넷을 사용하는 데 많은 기술적, 경제적 제약이 따른다. 육상의 인터넷 서비스를 바다 위에서 실현하기 위해서는 기지국과 같은 중앙 통제 시스템이 없는 MANET을 기반으로 하는 해상통신망이 새롭게 구축되어야 한다. 본 논문에서는 해상환경과 선박 내 단말장치의 특성을 최대한 고려한 해상 MANET 모델을 새롭게 설계하였다. 원양에서 선박들이 주로 주어진 항로를 기준으로 항해하는 특성을 고려하여, 개별적 이동노드(선박)를 대상으로 경로를 찾는 것이 아니라 정적 정보인 항로와 동적 정보인 선박을 복합적으로 활용하여 최단경로를 찾아내는 복합적 항로기반 라우팅(HCBR) 프로토콜을 제안하였다. 지리 정보를 이용하는 LAR 프로토콜과 성능 비교에서 경로 발견 시 제어패킷을 전혀 쓰지 않으면서 최단 경로를 훨씬 더 잘 찾아내는 특성을 실험적으로 파악하였다.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.31 no.4
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• pp.687-699
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• 2021

When a vulnerability occurs in a program, it is documented and published through CVE. However, some vulnerabilities do not disclose the details of the vulnerability and in many cases the source code is not published. In the absence of such information, in order to find a vulnerability, you must find the vulnerability at the binary level. This paper aims to find out-of-bounds read vulnerability that occur very frequently among vulnerability. In this paper, we design a memory area using memory access information appearing in binary code. Out-of-bounds Read vulnerability is detected through the designed memory structure. The proposed tool showed better in code coverage and detection efficiency than the existing tools.

• Proceedings of the Korea Contents Association Conference
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• 2015.05a
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• pp.283-284
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• 2015

본 연구의 목적은 초기~후기 청소년기의 학교적응력을 향상시키기 위하여 이에 영향을 미치는 가족 및 개인 요인과의 관계를 검증하고자 하는 것이다. 보다 구체적으로, 가족요인으로서 가족응집력과 개인요인으로서 자기효능감, 그리고 학교적응 간의 관계에 대한 연구모형을 설정하고 이들 간의 관계를 검증하고자 하였다. 이를 위하여 본 연구에서는 2010 한국청소년건강실태조사(Korean Survey on the Health of Youth and Children in 2010)를 통하여 9,844명의 제주도를 제외한 전국 초등학교 4~6학년생과 중 고등학생을 대상으로 수집된 자료에 대하여 구조방정식모형을 이용하여 그 적합도와 주요 변수들 간의 경로의 유의성을 확인하였다. 분석 결과, 본 연구에서 설정된 연구모형의 적합도는 양호한 것으로 나타났으며, 가족응집력은 자기효능감과 학교적응에 각각 정적으로 유의한 영향을 미치며, 자기효능감 역시 학교적응에 정적으로 유의한 영향을 미치는 것으로 확인되었다. 그리고 가족응집력과 학교적응 사이에서의 자기효능감은 통계적으로도 유의한 매개효과를 가지는 것으로 나타났다. 이러한 연구결과에 근거하여 학령기 청소년의 학교적응을 향상시킬 수 있는 개입 방안에 대한 함의를 제시하였다.

• Journal of Digital Convergence
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• v.18 no.5
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• pp.105-114
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• 2020

This study explored the factors affecting the willingness to pay of OTT service users. The main results are as follows. First, the perceived usefulness of OTT service users has a positive effect on use satisfaction. Second, perceived playfulness of OTT service users has a positive effect on use satisfaction. Third, the perceived cost of OTT service users has a positive effect on use satisfaction. Fourth, the perceived usefulness of OTT service users has a positive effect on willingness to pay. Fifth, use satisfaction with OTT service has a positive effect on willingness to pay. In summary, the perceived usefulness, perceived playfulness, and perceived cost of OTT service users increase the satisfaction of use, and the perceived usefulness and satisfaction are the key factors for predicting the willingness to pay. This will be meaningful in that it has revealed a path to predict and explain the intention of paid users of OTT service users.

• Journal of the Korean Institute of Intelligent Systems
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• v.16 no.2
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• pp.185-190
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• 2006

Most systems in ubiquitous computing analyze context information of users which have similar propensity with demographics methods and collaborative filtering to provide personalized recommendation services. The systems have mostly used static context information such as sex, age, job, and purchase history. However the systems have limitation to analyze users' propensity accurately and to provide personalized recommendation services in real-time, because they have difficulty in considering users situation as moving path. In this paper we use users' moving path of dynamic context to consider users situation. For the prediction accuracy we complete with a path completion algorithm to moving path which is inputted to RSOM. We train the moving path to be completed by RSOM, analyze users' moving pattern and predict a future moving path. Then we recommend the nearest product on the prediction path with users' high preference in real-time. As the experimental result, MAE is lower than 0.5 averagely and we confirmed our method can predict users moving path correctly.

• Journal of Digital Convergence
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• v.16 no.3
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• pp.439-449
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• 2018

The purpose of this study was to examine the effect of VR news focused on recall, understanding, enjoyment, visual fatigue and reuse intention through experimental study. Using Window SPSS 21.0 and AMOS 21.0 program, the data was analyzed by exploratory/confirmatory factor analysis, reliability analysis, correlation analysis and path analysis. The Results are as follows. First, presence and immersion among VR news characteristics influenced positively on users' recall of VR news. Second, presence, interactivity and immersion among VR news characteristics influenced positively on users' understanding of VR news. Third, presence, interactivity and immersion among VR news characteristics influenced positively on users' enjoyment of VR news. Fourth, presence among VR news characteristics influenced negatively on users' visual fatigue of VR news. Fifth, presence and immersion among VR news characteristics influenced positively on users' reuse intention of VR news. This study will provide on an important implication understanding VR news characteristics and VR news users.

• Korean Journal of Culture and Social Issue
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• v.29 no.1
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• pp.101-123
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• 2023

As an effort to further extend the existing understanding on the Psychology of Working Theory, this study examined gender differences in the paths to the attainment of decent work with Korean emerging adults. A total of 311 South Korean employees (mean age = 25.96, men = 94, women = 217) completed online questionnaires. We found that economic constraints inversely predicted work volition and career adaptability, which were positively relatedin turn, led to decent work. The overall indirect effect of work volition and career adaptability between economic constraints and decent work was significant., hHowever, the specific indirect effect of work volition and career adaptability was not significant. Further analyses showed a gender difference in the paths. Specifically, economic constraint was significantly negatively associated with work volition, and work volition predicted decent work only for women, but not for men. Moreover, economic constraint was significantly inversely associated with career adaptability, and career adaptability positively predicted decent work only for men, but not for women. Work volition mediated between economic constraints and decent work for women, while career adaptability had a mediating effect for men. It suggests that career resources for obtaining a decent work may be distinctive by genderdifferent groups.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.37 no.8
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• pp.780-788
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• 2009

AE technique was applied to the static structural test of the composite wing structure to evaluate the structural integrity and damage. During the test, strain and displacements measurement technique were used to figure out for static structural strength. AE parameter analysis and source location technique were used to evaluate the internal damage and find out damage source location. Design limit load test, the 1st and 2nd design ultimate load tests and fracture test were performed. Main AE source was detected by an sensor attached on skin near by front lug. Especially, at the 1st design ultimate test, strain and displacements results didn't show internal damage but AE signal presented a phenomenon that the internal damage was formed. At the fracture test, AE activities were very lively, and strain and displacements results showed a tendency that the load path was changed by severe damage. The internal damage initiation load and location were accurately evaluated during the static structural test using AE technique. It is certified from this paper that AE technique is useful technique for evaluation of internal damage at static structural strength test.

• Proceedings of the Korean Information Science Society Conference
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• 2004.04b
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• pp.847-849
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• 2004

프로그램 내에서 심각하지 않은 에러를 예외라고 한다. 자바에서는 프로그래머가 이러한 예외를 명시적으로 처리할 수 있으며 신뢰성 있는 프로그램 개발을 위해서는 발생 가능한 예외에 대한 적절한 처리가 중요하다. 이러한 예외의 처리 여부에 대한 연구는 주로 정적 분석을 중심으로 이루어져 왔으나 프로그램 실행 중에 예외 발생, 전파 경로에 대한 정확한 정보는 제공해주지 못한다. 본 연구에서는 프로그램 변란을 이용해 실행 중에 발생. 처리, 전파되는 예외 정보를 실시간으로 제공할 수 있는 시스템을 설계 개발한다.