• 한국콘텐츠학회논문지
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• 제6권4호
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• pp.98-108
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• 2006

예전의 영상처리 장비는 독립적으로 구현이 되었다고 하여도 단순히 디스플레이만 하는 정도이지만 현재 여러 가지 칩들의 발전으로 인한 그 응용에 있어 활용 범위가 다양해졌다. 본 연구에서는 아날로그 영상신호를 디지털로 변환하여 PC 없이 독립적으로 영상 데이터를 처리하는 시스템을 설계한다. 가상의 움직임에 따라 시뮬레이터를 제어하는 모션 벡터 추출기 및 시뮬레이터 제어기를 설계하고, 추출된 모션벡터를 이용하여 가상현실 시뮬레이터를 구동한다.

• 한국인공지능학회지
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• 제4권1호
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• pp.11-13
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• 2016

These days, medical technology has been developed rapidly to meet desire of living healthy life. Average lifespan was extended to let people see a doctor because of many reasons. This study has shown rate of leaving of hospitals to investigate the rate of not only department of surgery but also department of internal medicine. Linear model, tree, classification rule, association and algorithm of data mining were used. This study investigated by using J48 and AD tree of decision-making tree In this study, J48 and AD tree of decision-making tree of data mining were used to investigate based on result of both data. Both algorithms were found to have similar performance. Both algorithms were not equivalent to require detailed experiment. Collect more experimental data in the future to apply from various points of view. Development of medical technology gives dream, hope and pleasure. The ones who suffer from incurable diseases need developed medical technology. Environment being similar to the reality shall be made to experiment exactly to investigate data carefully and to let the ones of various ages visit hospital and to increase survival rate.

• Structural Engineering and Mechanics
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• 제18권1호
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• pp.41-58
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• 2004

The postbuckling behaviour of thin shells has fascinated researchers because the theoretical prediction and their experimental verification are often different. In reality, shell panels possess small imperfections and these can cause large reduction in static buckling strength. This is more relevant in thin laminated composite shells. To study the postbuckling behaviour of thin, imperfect laminated composite shells using finite elements, explicit incremental or secant matrices have been presented in this paper. These incremental matrices which are derived using Marguerre's shallow shell theory can be used in combination with any thin plate/shell finite element (Classical Laminated Plate Theory - CLPT) and can be easily extended to the First Order Shear deformation Theory (FOST). The advantage of the present formulation is that it involves no numerical approximation in forming total potential energy of the shell during large deformations as opposed to earlier approximate formulations published in the literature. The initial imperfection in shells could be modeled by simply adjusting the ordinate of the shell forms. The present formulation is very easy to implement in any existing finite element codes. The secant matrices presented in this paper are shown to be very accurate in tracing the postbuckling behaviour of thin isotropic and laminated composite shells with general initial imperfections.

• 디지털콘텐츠학회 논문지
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• 제19권9호
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• pp.1631-1639
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• 2018

VR 360 영상 콘텐츠는 이전 영상 콘텐츠와는 달리 필연적으로 관객이 부분적인 감상을 하게 되므로, 이에 대한 새로운 영상 언어 연구가 필요하다. 본 연구에서는 특히 VR 360 영상 콘텐츠가 360도로 배경이 확장되므로, 그 안에서 사건 요소와 배경 요소의 적절한 배치가 관객들의 시선을 유도하는데 주요한 역할을 하게 될 것이라는 점에 주목하였다. 따라서 본 연구에서는 서사적 관점에서 사건 요소 및 배경 요소의 배치에 초점을 맞춰, 선정 사례들의 양상을 분석하였다.

• Nuclear Engineering and Technology
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• 제49권2호
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• pp.286-294
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• 2017

The events at the Fukushima Daiichi Nuclear Power Station in March 2011 point out, among other matters, that concurrent accidents at multiple units of a site can occur in reality. Although site risk has been deterministically considered to some extent in nuclear power plant siting and design, potential occurrence of multi-unit accident sequences at a site was not investigated in sufficient detail thus far in the nuclear power community. Therefore, there is considerable worldwide interest and research effort directed toward multi-unit site risk assessment, especially in the countries with high-density nuclear-power-plant sites such as Korea. As the technique of probabilistic safety assessment (PSA) has been successfully applied to evaluate the risk associated with operation of nuclear power plants in the past several decades, the PSA having primarily focused on single-unit risks is now being extended to the multi-unit PSA. In this paper we first characterize the site risk with explicit consideration of the risk associated with spent fuel pools as well as the reactor risks. The status of multi-unit risk assessment is discussed next, followed by a description of the emerging issues relevant to the multi-unit risk evaluation from a practical standpoint.

• 한국멀티미디어학회논문지
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• 제17권12호
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• pp.1461-1472
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• 2014

Recently, smart devices has been spreaded and the definition of RFID/USN(Radio Frequency Identification/Ubiquitous Sensor Network) technology has also extended. So, originally, human is an agent of communications but now, 'the things' are also an agent of communication. That is, Internet of Things(IoT). IoT is very big IT infra technology that is based on wire-wireless network technologies such as Bluetooth and Wi-Fi. However, in reality, IoT service that can provide various meaning and integrate smoothly is not appear yet. To solve these problems of IoT, we implemented Publish/Subscribe system, which operate in Zigbee based wireless sensor network by using MQTT-SN protocol. Moreover, this system can operate with combining MQTT system that is already existed in external Internet network so, extensibility and flexibility aspect is excellent. We show that possibility of IoT services that is combined between different heterogeneous network through the MQTT-SN.

• 한국컴퓨터정보학회논문지
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• 제15권2호
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• pp.83-89
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• 2010

본 논문에서는 게임이 아동들이나 청소년들에게 폭력성을 배제하고 교육적인 내용의 게임을 만들려면 게임의 구성과 설계가 중요하다. 그러므로 본 논문에서는 아동이나 청소년들에게 교육적인 내용의 게임을 설계하여 두뇌 발달을 시키고, 게임의 즐거움을 줄 수 있도록 하였다. 특히 아동들을 위해 화면에서 토끼 같은 캐릭터를 추가하여 게임의 폭력성 보다는 친근한 이미지의 동물들의 캐릭터를 살려 설계하였다. 전체 화면에 대한 객체 설계와 구현된 게임에 대한 화면에 대한 내용도 살펴보았으며, 구현된 게임의 장점을 나열하였고, 향후 발전방향에 대하여 논하였다.

• 정보교육학회논문지
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• 제17권4호
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• pp.467-474
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• 2013

본 연구에서는 STEAM 교육과 미래 유망직종인 사이버네트워크 전문가의 교육활용 연구 사례를 살펴보고 이를 토대로 초등학교 3-4학년을 위한 사이버 네트워크 주제 STEAM 진로 교육프로그램과 수업 방안을 제시한다. 3-4학년의 지적 발달 수준과 흥미를 고려하여 교육프로그램을 구성하고 이에 따른 교재와 교사용 지도서를 개발하였다. 개발된 교재의 실효성을 검증하기 위해 제주도내 3-4학년 학생을 대상으로 단계별로 교육을 진행하였으며, 향후 추적연구 및 확대 적용도 이루어질 예정이다. 본 연구에서 제공하는 사이버 네트워크 주제 STEAM 진로 교육프로그램을 지도함으로써 IT관련 진로 탐색과 관련 소양 발달에 좋은 효과를 얻을 수 있을 것으로 기대된다.

• 한국어교육
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• 제29권1호
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• pp.85-108
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• 2018

This study pointed out the reality that many novice Korean language teachers who lack rater training are scoring the learners' writing skill. The study performed and analyzed a case where pre-service teachers were educated in order to explore the possibility of promoting rater training in a Korean language teacher training course. The pre-service teachers majoring in Korean language education at the graduate school scored TOPIK compositions and were provided feedback by the FACETS program, which were further discussed at the rater meeting. In three scoring processes, the raters scored with conscious of own rating patterns and showed positive change or over correction due to excessive consciousness. Consequentially, ongoing training can improve rating ability, and considering the fact that professional rater training is hard to progress, the method composed of FACETS analysis and rater training revealed positive effects. On the other hand, the rater training including native Korean and non-native(Chinese) speakers together showed no significant difference by mother tongue but by individual difference. This can be interpreted as a positive implication to the rating reliability of non-native speakers possessing advanced Korean language abilities. However, this must be supplemented through extended research.

• Nuclear Engineering and Technology
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• 제53권7호
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• pp.2237-2250
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• 2021

The analog-based Ex-core Neutron Flux Monitoring System (ENFMS) in Korean Nuclear Power Plants (NPPs) has been performing its intended functions successfully for a long time. On the other hand, the primary concern with the extended use of analog systems is the aging effect, such as mechanical failures, environmental degradation, and obsolescence. The transition to a digital-based Man-Machine Interface Systems (MMIS) in Korea and other countries has been accelerating, but some systems are still analog-based IC systems, such as the ENFMS in APR1400 NPPs. Digitalized ENFMS can become a reality using computers and microprocessors owing to the progress in digital electronics and information technology. This paper presents the result of the first phase of the research on the digitalization of the ENFMS signal processing electronics for NPPs operated or produced in Korea. It has two main parts: (1) review engineering bases of ex-core neutron flux monitoring system, including nuclear engineering, instrumentation techniques, and analog and digital signal processing techniques, and (2) analysis of analog signal processing electronics of ENFMS for OPR1000 and APR1400 power plants. They are prerequisite to the second phase of the research which is the detailed implementation of the digitalization.