• 디지털융복합연구
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• 제18권10호
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• pp.13-22
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• 2020

본 연구는 중고령자의 디지털헬스기기에 대한 자기효능감과 이용의도 간의 관계를 중장년층과 노년층 집단별로 살펴보고자 하였다. 이에 따라 본 연구는 『2019 한국 중·고령자 기술수용도 조사』를 이용하여, 빈도분석과 T-test 분석, 선형회귀분석을 시행하였다. 본 연구의 분석결과는 다음과 같다. 첫째, 중장년층과 노년층의 디지털헬스기기 이용의도를 비교한 결과, 중장년층의 이용의도(5.07점)는 노년층(4.86점)에 비해 상당히 높은 것으로 나타났다. 둘째, 중장년층의 자기효능감(7.74점) 역시 노년층(6.21점)보다 높게 나타났지만 두 연령집단 모두 절반보다 높게 나타나 상당히 높은 자기효능감을 갖고 있는 것으로 나타났다. 마지막으로, 연령집단별 자기효능감과 이용의도 간 관계를 살펴본 결과, 중장년층의 경우 자기효능감과 이용의도 간의 관계가 유의미하지 않은 것으로 나타났으나 노년층의 경우에는 자기효능감과 이용의도 간의 관계가 정적인 방향으로 영향을 미치는 것으로 나타났다. 즉, 노년층의 경우에는 디지털기기에 대한 자기효능감이 높을수록 디지털헬스기기 이용의도가 높아지는 것으로 나타났다. 이와 같은 연구결과를 통해 중고령자의 디지털헬스기기 활용 증진을 위해서는 자기효능감을 증진시킬 수 있는 교육프로그램이 선제적으로 도입될 필요가 있으며, 중장년층과 노년층의 연령집단 특성에 따라 차별화된 전략이 필요함을 제시하였다. 본 연구는 연령집단에 따른 디지털헬스기기 이용의도 연구의 기초연구가 될 것으로 기대하며 후속연구로서 유용성, 편의성, 불안 등이 포함된 연구를 제시하였다.

• 농촌계획
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• 제24권4호
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• pp.121-134
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• 2018

By using the raw data of the 2015 Agriculture, Forestry and Fishery Consensus that surveyed the farmers engaged in agriculture, forestry and fishery in 2015, this study investigated the effects of the characteristics of the farms in Gangwon-do on the utilization of the digital devices, which was classified into computers usage only, smartphones usage only, both computers and smartphones usage, and no digital device usage. This study used the Multinomial Logit Model for the above purpose. Moreover, the IIA(Independence of Irrelevant Alternatives) method of the Multinomial Logit Model was analyzed to be suitable. Upon the result of the analysis, when all the other variables were constant in the average, the probability of choosing both computers and smartphones increased by 0.02% as the family member living together with the farm owner increased by 1 person. In addition, the farms with agricultural machineries have 0.03% increased probability of using smartphones to sell their agricultural products, when compared with the farms without agricultural machinery. Moreover, for the farms with high sales profit of the agricultural products, the probability of using computers and the probability of using smartphones increased by 0.04% and 0.01%, respectively, and the probability of using both computers and smartphones increased by 0.02%. On the other hand, for the farms affiliated with the agricultural organization, the probability of using both computers and smartphones increased by 0.17%, and the probability of using only smartphones and the probability of using only computers increased by 0.16% and 0.15%, respectively. In case of selling to the National Agricultural Cooperative Federation(NACF), the probability of using smartphones increased by 0.11% if all other variables were to be constant in the average. In particular, the farms participating in the agriculture-related industries have 1.09% increased probability of using computers, have 0.92% increased probability of using smartphones, and 0.85% increased probability of using both computers and smartphones. Therefore, the implications suggested based on the results of the analysis are as follows. First, the farms' choices of the digital devices are made independently. Hence, the future agricultural industry business platform establishment should necessarily consider the types of farms' choices of the digital devices in the future. Second, since the usage of digital devices has a generally positive influence on the farm household income, digital education to improve farmers' ability to use the digital devices should be urgently provided in order to improve the farm household income in the farms in Gangwon-do. Third, because the digital devices used to sell agricultural products differ depending on the age of the farm owner, it would be desirable to target the younger generation of the farm owners rather than establishing the agricultural industry business platform for the farms in the aged farm villages. Fourth, it would be advisable for the future agricultural business platform to consider the characteristics of agricultural products sales source.

• 한국콘텐츠학회논문지
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• 제7권8호
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• pp.21-30
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• 2007

오늘날 내장형 장치의 보급 증가와 반도체 및 저장장치 기술의 발달로 인해 디지털 컨버전스 기기들이 늘어나고 있다. 디지털 컨버전스 기기는 PMP, PDA, 스마트폰 등과 같이 하나의 디지털 기기에 통신, 동영상과 음악 재생, 전자 수첩, 전자 사전 등의 기능이 집적된 장치를 말한다. 따라서 이러한 장치에는 여러 기능을 관리하고 제어할 수 있는 효율적인 파일 시스템의 설계가 필요하다. 파일 시스템을 설계하는데 있어서는 소형화된 내장형 장치에 맞는 사이즈, 성능, 호환성 등을 고려해야 한다. 본 논문에서는 부분 버퍼 캐쉬 기법을 제안한다. 기존의 버퍼 캐쉬에 비해, 부분 버퍼 캐쉬는 FAT 데이터와 쓰기 전용 데이터를 저장한다. 시뮬레이션을 통해 파일 크기가 100KBye가 넘는 경우, 부분 버퍼 캐쉬를 사용함으로써 쓰기 성능을 30% 이상 증가시킬 수 있음을 보인다.

• 한국산학기술학회논문지
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• 제10권2호
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• pp.351-357
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• 2009

홈 네트워크는 가정 내의 가전기기들이 모여 하나의 네트워크를 이루는 것으로 가전기기들의 발전함에 따라 확장되어 가고 있으며, 또한 디지털 콘텐츠의 수도 무수히 증가하고 있다. 그러나 콘텐츠 가전기기 사이에 사용 운영성 부족으로 디지털 콘텐츠의 지속적인 저작권 보호가 힘들 뿐 아니라, 가전기기간에 콘텐츠 이동을 위해서는 DRM 서버로부터 라이선스를 재발급 받아야 한다. 홈 네트워크 안에서 디바이스 상호 인증을 통해 콘텐츠를 다른 디바이스로 자유롭게 이동 할 수 있는 프레임워크를 제안하며, DRM 서버의 라이선스 관리 부담을 줄이고 외부의 사용자가 홈 네트워크에 접근하더라도 디바이스 인증을 통해 콘텐츠 사용이 가능한 시스템을 제안한다.

• Journal of Information Processing Systems
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• 제14권5호
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• pp.1272-1285
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• 2018

The paper presents a novel embedded multifunctional media sever (EMMS) for mobile devices to receive various media programs. Being different from other contemporary system research, the paper mainly studies how to design a reception solution for terrestrial digital television (DTV) on mobile devices and how to enable mobile devices can receive DTV program, enjoy video-on-demand (VOD), achieve video surveillance and relay Internet video program via local Wi-Fi simultaneously. In the system design, we integrate broadcasting-terrestrial DTV tuner, streaming media re-transmission system, VOD disk, video camera and access interface to the Internet into EMMS, which can either receive terrestrial DTV radio signals and demodulate out digital transport stream (TS), or can read streaming media bit-stream from VOD disk, surveillance camera or access interface to the Internet. The experimental results show the proposed system is stable and quality-efficient. Comparing with the other systems, the proposed system has the least packet loss rate and response time.

• 디지털산업정보학회논문지
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• 제17권3호
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• pp.17-26
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• 2021

Internet of Things is an infrastructure of the interconnected devices. In Internet of Things environment, many smart devices are used in daily life. It requires a new retrieval method using multiple devices. We propose an information retrieval method using both device characteristics and device usage characteristics in multi-device environments. Firstly, information retrieval is performed using a general purpose device. And then, it is performed using dedicated devices. Our method uses both characteristics of the devices and usage characteristics of them. Moreover, it considers queries on the general purpose device. This paper proposes a new retrieval method and describes algorithms. Then, it presents smart home scenarios. Performance evaluation is performed using the scenarios. The evaluation results show higher precision and efficiency than previous researches. The proposed method gets information more accurately and quickly in IOT multiple device environments.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2007년도 7th International Meeting on Information Display 제7권2호
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• pp.1429-1432
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• 2007

We fabricated white organic light emitting diodes(WOLED) having two complementary and three primary colors with emission layers of DPVBi / MADN : DCM2-0.5% and DPVBi / $Alq_3$ / MADN : DCM2-1.5%, respectively. WOLED using three primary colors shows broad electroluminescence including green emission peak at 510nm while optical properties of the two complementary WOLED was higher current efficiency of 6.2 cd/A than 4.9 cd/A of three primary color WOLED. The maximum luminescence of WOLED with two complimentary color was $15200cd/m^2$ along with luminous efficiency 6.2cd/A, as achieving stable white color coordinates for both of WOLEDs at (0.33 , 0.33) almost.

• Nuclear Engineering and Technology
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• 제44권6호
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• pp.697-708
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• 2012

The majority of instrumentation and control (I&C) systems in today's nuclear power plants (NPPs) are based on analog technology. Thus, most existing I&C systems now face obsolescence problems. Existing NPPs have difficulty in repairing and replacing devices and boards during maintenance because manufacturers no longer produce the analog devices and boards used in the implemented I&C systems. Therefore, existing NPPs are replacing the obsolete analog I&C systems with advanced digital systems. New NPPs are also adopting digital I&C systems because the economic efficiencies and usability of the systems are higher than the analog I&C systems. Digital I&C systems are based on two technologies: a microprocessor based system in which software programs manage the required functions and a programmable logic device (PLD) based system in which programmable logic devices, such as field programmable gate arrays, manage the required functions. PLD based systems provide higher levels of performance compared with microprocessor based systems because PLD systems can process the data in parallel while microprocessor based systems process the data sequentially. In this research, a bistable trip logic in a reactor protection system (RPS) was developed using very high speed integrated circuits hardware description language (VHDL), which is a hardware description language used in electronic design to describe the behavior of the digital system. Functional verifications were also performed in order to verify that the bistable trip logic was designed correctly and satisfied the required specifications. For the functional verification, a random testing technique was adopted to generate test inputs for the bistable trip logic.

• Journal of Astronomy and Space Sciences
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• 제23권4호
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• pp.445-452
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• 2006

이 논문은 OBC와 위성 서브 컴포넌트와 같은 원격장비 사이의 데이터 접속을 근간으로 하는 위성 디지털 베이스 밴드의 개념설계를 기술한다. 본 개념설계에서는 OBC와 위성 원격장비 사이의 데이터 접속을 단일화하고 그 접속 단계를 계층화한 결과를 제시한다. 다른 형태의 시스템과의 비교를 수행하였으며, 이 개념에 의한 디지털 베이스 밴드의 장단점을 고찰하였다.

• 한국정보시스템학회지:정보시스템연구
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• 제23권4호
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• pp.169-196
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• 2014

This study investigates how information and communication technology (ICT) can damage intellectual property rights (IPR) in the movie industry. Utilizing a survey questionnaire to gather information about the extensive use of ICT devices, including tablet PCs and smartphones, we demonstrate how digital piracy behavior is associated with various socio-demographic characteristics. Econometrically, since a large number of people do not engage in piracy activities, we adopt a zero-inflated negative binomial model. We find that people with tablet PCs are more likely to engage in the piracy of movies from peer-to-peer (P2P) sites. In particular, when we categorize ICT devices based on whether they are portable and allow downloads, we find that people with devices equipped with both functions are most likely to engage in movie piracy.