• 융합정보논문지
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• 제10권5호
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• pp.23-29
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• 2020

최근 디지털 범죄 수사는 많은 범죄 현장에서 사용되고 있다. 범죄 현장에서는 다양한 전자 장치가 존재하며, 이러한 장치의 디지털포렌식(Digital Forensics) 결과는 중요한 증거로 사용된다. 특히, 디지털포렌식에서 사용자의 행동과 해당 행동이 발생한 시간은 매우 중요한 정보이다. 하지만 사용자의 행동이 기록되는 주기가 짧은 한계점을 가지고 있다. 이러한 특징은 실제 디지털포렌식의 제한 요소로 작용한다. 본 논문에서는 삭제된 사용자 행동 레코드를 복구하고 이를 디지털포렌식에 적용하였으며, 이전 조사 방법과 차이점을 비교하였다. 스토리지에 따라 복구 결과에는 차이가 존재하지만 복구 된 사용자의 동작이 디지털포렌식에 활용 될 때, 사용자 행위 기록이 최소 6%에서 최대 539%로 증가하는 결과를 보여준다.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2004년도 ICCAS
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• pp.1205-1210
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• 2004

The 4-20mA analog signal used in the various industrial fields to interface sensor in distributed process control has been replaced with relatively simple digital networks, called "fieldbus, and recently by Ethernet. Significant advances in Internet and computer technology have made it possible to develop an Internet based control, monitoring, and operation scheduling system for heating, ventilation and air-conditioning (HVAC) systems. The seamless integration of data networks with control networks allows access to any control point from anywhere. Field compatible field devices become so-called "smart" devices, capable of executing simple control, diagnostic and maintenance functions and providing bidirectional serial communication to higher level controller. The most important HVAC of BAS has received nationwide attention because of higher portion of more than 40% in building sector energy use and limited resources. This paper presents the Internet-based monitoring and control architecture and development of LonWorks control modules for AHU (air handling units) of HVAC in viewpoint of configuring BAS network. This article addresses issues in architecture section, electronics, embedded processors and software, and internet technologies.

• 한국멀티미디어학회논문지
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• 제20권2호
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• pp.396-403
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• 2017

In recent years, the use of touch screens has expanded, and devices such as remote controllers have been developed in various ways to control and access contents at long range. The wireless-based touch screen is used in classroom, seminar room, and remote video conversation in addition to the TV remote control. The purpose of the study is to design a smart phone-based intuitive interface that can perform the role of a wireless mouse and a wireless keyboard at range using Bluetooth and to develop an application that integrates functions of a mouse and a keyboard. Firstly, touch interaction model for controlling software such as PowerPoint by connecting to a general PC on a smart phone has been studied. The most simple touch operation interface is used to reproduce the function of existing devices and design more simply. The studies of the extension of interfaces with various functions are important, but development of optimized interfaces for users will become more important in the future. In this sense, this study is valuable.

• 공업화학전망
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• 제23권2호
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• pp.1-11
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• 2020

In this report, we summarize recent progress in the development of electrolyte-gated transistors (EGTs) for various printed electronics. EGTs, employing a high capacitance electrolyte as gate dielectric layer in transistors, exhibits increasing of drive current, lowering operation voltage, and new transistor architectures. While the use of electrolytes in electronics goes back to the early days of silicon transistors, the new printable, fast-responsive polymer electrolytes are expanding their range of applications from printable and flexible digital circuits to various neuromorphic devices. This report introduces the structure and operating mechanism of EGT and reviews key developments in electrolyte materials used in printed electronics. Additionally, we will look at various applications with EGTs that are currently underway.

• 반도체디스플레이기술학회지
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• 제13권1호
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• pp.67-72
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• 2014

Recently released digital devices have various characteristics such as different screen sizes or different sensors embedded, according to the purpose of their use. So the device types are fragmented and the software should be independently developed for each devices with different characteristics. RRUI are being developed and standardized in progress to provide UI using user information and context information, as one way of solving the device fragmentation. In this paper, we take a look at various standards that classify and utilize user information and context information for RRUI and try to find correlations between MPEG-UD and RRUI.

• 한국컴퓨터정보학회논문지
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• 제25권3호
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• pp.129-143
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• 2020

본 연구는 웨어러블 헬스케어 기기 사용자들의 수용의도를 보다 효과적으로 설명하기 위하여, 개인 혁신성에 따른 수용의도를 살펴보고 이를 확장된 통합기술수용모형(UTAUT2, Extended UTAUT) 이론에 적용하여 실증분석을 실시하고 그 결과에 따른 학술적·실무적 시사점을 제시하고자 한다. 본 연구에서 제안된 가설들을 검증하기 위해 PLS 3.0을 사용하여 구조모형을 검증하였다. 본 연구의 결과는 다음과 같이 요약될 수 있다. 첫째, 개인 혁신성이 웨어러블 헬스케어 기기의 성과기대와 노력 기대, 촉진조건, 쾌락적 동기, 가격 효용성에 매우 유의한 영향을 미치는 것으로 나타났다. 둘째, 해당 기기를 수용하고자 하는 태도에 성과기대, 노력기대, 쾌락적 동기, 가격 효용성이 웨어러블 헬스케어 기기를 수용하고자 하는 태도에 유의한 영향을 미치는 것으로 나타났다.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2008년도 춘계학술대회논문집
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• pp.613-617
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• 2008

One of the important parts on multimedia era is acoustic ones. With increased demand of smallest multimedia products such as personal digital assistant (PDA) and mobile phones, it is necessary to develop acoustic devices which have higher performance and smaller size. Acoustic parts with various function for hearing impaired persons. This paper introduces a bone conduction vibrator (BCV) for hearing impaired persons to use portable acoustic device without additional devices. For vibration analysis of the BCV, electromagnetic, mechanical and their coupling effects are considered for the analysis. This paper shows that the development of design and analysis technique by finite element method (FEM) of BCV.

• Journal of Contemporary Eastern Asia
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• 제19권1호
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• pp.43-58
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• 2020

This study examines media used for information in the East Asian countries of China, Japan, South Korea, Taiwan, and Singapore, using data from the World Values Survey. The sharing of Confucian culture may lead to a uniform media structure across these nations. Another possibility is technological determinism, which would also lead to similarity across nations. However, it is possible that countries are at different stages of technology development and will eventually become more similar. An opposing notion is that differences in other values among nations predict digital media use. To examine the evidence considering these possibilities, we factor analyze each population's use of nine traditional and digital media to see how similar the structures are. What results is a three-dimensional solution for four out of five countries, except Singapore, which has a more simple two-dimensional structure. Analysts regard Singapore as the most digitally connected society, which raises the question as to whether it is higher on a technological development trajectory, to which other countries may transition. Perhaps a more simple media use structure is an adaptation to increasing information load. As well, as mobile devices have become a primary means of accessing the range of traditional and social media, it may have an expanded role in reducing media channel entropy. In terms of frequency of media use, Singapore is highest, while China is the lowest. Singapore stands out in high mobile use, and China for low Internet use. There appear to be developmental differences across the nations. Regressions on Internet use for 18 values indices find different values predictors in the East Asian countries, ruling out Confucianism as producing similar media patterns.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2002년도 합동 추계학술대회 논문집 정보 및 제어부문
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• pp.585-588
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• 2002

Grid provides integral ing system that enables to use distributed computing resource and services as adapts traditional infrastructures to overcome the distributed computing environments. But, computing today is moving away from a restriction of the desktop, becoming diffused into our surrounding and onto our personal digital devices. In such mobile computing environments, users expects to access resource and services at any time from anywhere in such Mobile-Grid computing. This expectation results security issues, since the computing environments is expanded. This paper describes the security challenges in Mobile-Grid computing, explaining why traditional security mechanism fail to meet the demands of these environments. This paper describes policy driven security mechanism enabled entity to use service and data in trust Mobile-Grid environments and a set of security service module that need to be realized in the Mobile-Grid security architecture presents a set of use pattern that show hew these modules can be used for billing service in a secure Mobile-Grid environments.

• 한국전자거래학회지
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• 제21권4호
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• pp.15-28
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• 2016

국내 무선인터넷 산업은 지속적으로 성장하여 향후 웹 접속의 대표기기는 PC가 아닌 모바일 디바이스가 될 것으로 전망된다. 이러한 모바일 디바이스 수요의 폭발적인 증가는 우리들의 시간 공간적 제한을 사라지게 하는 등 편리한 생활을 누릴 수 있도록 만들어 주었지만 정보격차 등 여러 가지 부작용도 나타나게 되었다. 본 논문에서는 모바일 기기를 활용한 콘텐츠 활용도와 모바일 인터넷에 대한 적극적 태도를 세대 간, 교육수준, 경제수준에 따라 분석하고 모바일 콘텐츠 활용의 높음이 적극적 태도에 영향을 주는지에 대해 분석하고자 한다. 연구결과, 연령대가 젊을수록, 교육수준이 높을수록, 경제수준이 높을수록 모바일 콘텐츠에 대한 이용도가 높고 모바일 인터넷 이용에 대한 적극적 태도도 높으며, 모바일 콘텐츠에 대한 이용도가 높을수록, 모바일 인터넷 이용에 대한 적극적 태도도 높다는 것을 확인하였다. 이러한 분석 결과는 모바일 콘텐츠의 활용, 적극적 태도에 개인 특성에 따른 격차를 파악하여 이를 완화시켜줄 정책에 활용하고자 한다.