• 한국콘텐츠학회논문지
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• 제10권7호
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• pp.40-48
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• 2010

자외선 사진은 범죄수사, 고고학, 피부의학 등 다양한 분야에서 활용되고 있다. 과거 자외선 사진은 일반적인 흑백필름을 이용하여 촬영하는 경우가 대부분이었는데, 그 이유는 필름의 감광유제로 사용되는 할로겐화은(AgX)성분이 카메라의 센서인 CCD(Charge Coupled Device)혹은 CMOS(Complementary Metal-Oxide-Semiconductor)에 비해 자외선에 민감하기 때문이다. 이에 본 논문에서는 보급형 디지털 카메라를 사용하여 자외선 사진의 화질을 개선시키고, 자외선 사진을 위한 최적의 디지털 카메라 특성을 찾는 것을 목적으로 하였다. 이를 위해 디지털 카메라의 적외선 차단 필터를 제거하고, 자외선 투과필터의 개조를 통해 자외선 사진의 화질향상 여부를 검증하였다. 또한 센서의 종류와 크기, 화소수에 따른 자외선 사진의 재현성을 화질측정 요소들을 통해 분석하였으며, 이를 통해 디지털을 이용한 자외선 사진에 가장 적합한 카메라 특성을 찾고자 하였다. 나아가 본 논문을 통해 일반 디지털 카메라를 활용한 자외선 촬영 시스템을 구축할 수 있을 것이며, 이는 결국 디지털 자외선 사진의 폭넓은 활용에 기여할 것으로 기대된다.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2016년도 제50회 동계 정기학술대회 초록집
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• pp.389.1-389.1
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• 2016

The flexible solid state device has been widely studied as portable and wearable device applications such as display, sensor and curved circuits. A zero-bias operation without any external power consumption is a highly-demanding feature of semiconductor devices, including optical communication, environment monitoring and digital imaging applications. Moreover, the flexibility of device would give the degree of freedom of transparent electronics. Functional and transparent abrupt p/n junction device has been realized by combining of p-type NiO and n-type ZnO metal oxide semiconductors. The use of a plastic polyethylene terephthalate (PET) film substrate spontaneously allows the flexible feature of the devices. The functional design of p-NiO/n-ZnO metal oxide device provides a high rectifying ratio of 189 to ensure the quality junction quality. This all transparent metal oxide device can be operated without external power supply. The flexible p-NiO/n-ZnO device exhibit substantial photodetection performances of quick response time of $68{\mu}s$. We may suggest an efficient design scheme of flexible and functional metal oxide-based transparent electronics.

• 정보처리학회논문지A
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• 제16A권5호
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• pp.369-380
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• 2009

SNMP는 네트워크 장비들을 관리하기 위한 표준 프로토콜로서, 확장성, 정보관리, 인증, 암호화, 접근 제어 등과 같은 우수한 장비 관리기능을 제공한다. 그러나 상황적응형 서비스를 제공하기 위한 제어 기능을 갖는 디지털 컨버전스 장비들을 통합 관리하기에는 제어기능이 취약하며, SNMP 통신 메시지의 길이에 제약이 있다는 단점이 있다. 이러한 문제점을 해결하기 위하여, 본 논문에서는 제어기능을 가진 디지털 컨버전스 장비들을 통합 관리하기 위한 확장된 SNMP를 제안한다. 확장된 SNMP는 다양한 디지털 컨버전스 장비들을 효과적으로 제어하기 위해 SNMP 엔진에 DDS (Device Driver Subsy stem)를 추가하고 CADM (Control Agent Driver Model)을 정의하여 그 구조를 개선하였다. 따라서 설정과 제어 구분의 모호성을 해결하였고, 추상화된 인터페이스를 지원함으로써 SNMP 어플리케이션이 장비를 쉽게 제어할 수 있도록 하였다. 또한 SNMP 통신 메시지 길이의 제약을 받지 않는 세 개의 SNMP 명령어를 추가함으로써 용량이 큰 고수준의 데이터도 전송이 가능하도록 하였다.

• IMMUNE NETWORK
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• 제23권2호
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• pp.18.1-18.15
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• 2023

It has been reported that some exercise could enhance the anti-viral antibody titers after vaccination including influenza and coronavirus disease 2019 vaccines. We developed SAT-008, a novel digital device, consists of physical activities and activities related to the autonomic nervous system. We assessed the feasibility of SAT-008 to boost host immunity after an influenza vaccination by a randomized, open-label, and controlled study on adults administered influenza vaccines in the previous year. Among 32 participants, the SAT-008 showed a significant increase in the anti-influenza antibody titers assessed by hemagglutination-inhibition test against antigen subtype B Yamagata lineage after 4 wk of vaccination and subtype B Victoria lineage after 12 wk (p<0.05). There was no difference in the antibody titers against subtype "A." The SAT-008 also showed significant increase in the plasma cytokine levels of IL-10, IL-1β, and IL-6 at weeks 4 and 12 after the vaccination (p<0.05). A new approach using the digital device may boost host immunity against virus via vaccine adjuvant-like effects.

• 디지털산업정보학회논문지
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• 제13권1호
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• pp.69-78
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• 2017

As the smartphone-based devices are diffused and developed rapidly, they provide the convenience to the users. The abovementioned sentence technologies are being used not only in the existing sensor and wireless network technology but also in the application services of the diverse fields application services such as smart appliance, smart car, smart health care, etc. and the new fusion paradigm from the industry is presented by undertaking the researches in diverse area by the enterprises and research institutions. However, the smart environment exposes its weaknesses in the mobile terminal area, existing wireless network and IT security area. In addition, due to new and variant ways of attack, not only the critical information are disclosed However also the financial damages occur. This paper proposed the protocol to perform the smartphone-based safe device monitoring and safe communication. The proposed protocol designed the management procedure of registration, identification, communication protocol and device update management protocol and the safety against the attack techniques such as the an-in-the-middle-attack, impersonation attack, credential threat, information leaks and privacy invasion was analyzed. It was observed that the proposed protocol showed the performance improved by approximately 52% in the communication process than the existing system.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년 학술대회 논문집 정보 및 제어부문
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• pp.391-393
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• 2006

In this paper, we develop a portable game device with uncompressed HD video and high quality sound output. Portable game devices support not only game function but also various complex functions recently. It especially supports TV-Out port to play realistic game, connecting a large screen display device. But the video and audio output signals of conventional TV-out port have the low performance and these signals are analog output. So, it is difficult that the users enjoy realistic game with benefit of high resolution digital TV. We propose the game device output with uncompressed digital signal, which has no delay of video/audio signal, also has strong immunity to external noise. Since it supports a high resolution video and high quality sound, users can playa realistic game. First, we implement the HDMI to the game device and we test reliability with the various resolutions video inputs and audio inputs. The proposed method can be applied multimedia devices requiring high performance output function as well as portable devices.

• 한국정밀공학회지
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• 제24권10호
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• pp.46-53
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• 2007

This paper describes the development of a high-precision measuring device with DSP (digital signal processor) for the accurate measurement of the 6-axis force/moment sensor mounted to a humanoid robot's ankle. In order to walk on uneven terrain safely, the foot should perceive the applied forces Fx, Fy, and Fz and moments Mx, My, and Mz to itself, and control the foot using the measured them. The applied forces and moments should be measured from two 6-axis force/moment sensors mounted to the feet, and the sensor is composed of Fx sensor, Fy sensor, Fz sensor, Mx sensor, My sensor and Mz sensor in a body (single block). In order to acquire output values from twelve sensors (two 6-axis force/moment sensor) accurately, the measuring device should get the function of high speed, and should be small in size. The commercialized measuring devices have the function of high speed, unfortunately, they are large in size and heavy in weight. In this paper, the high-precision measuring device for acquiring the output values from two 6-axis force/moment sensors was developed. It is composed of a DSP (150 MHz), a RAM (random access memory), amplifiers, capacities, resisters and so on. And the characteristic test was carried out.

• JSTS:Journal of Semiconductor Technology and Science
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• 제13권2호
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• pp.127-138
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• 2013

The impact of Empty Space layer in the channel region of a Double Gate (i.e. ESDG) MOSFET has been studied, by monitoring the DC, RF as well as the digital performance of the device using ATLAS 3D device simulator. The influence of temperature variation on different devices, i.e. Double Gate incorporating Empty Space (ESDG), Empty Space in Silicon (ESS), Double Gate (DG) and Bulk MOSFET has also been studied. The electrical performance of scaled ESDG MOSFET shows high immunity against Short Channel Effects (SCEs) and temperature variations. The present work also includes the linearity performance study in terms of $VIP_2$ and $VIP_3$. The proper bias point to get the higher linearity along with the higher transconductance and device gain has also been discussed.

• 디지털산업정보학회논문지
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• 제15권2호
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• pp.43-52
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• 2019

The recent technological developments of smart devices, multiple services are provided to enhance the users' quality of life including smart city, smart energy, smart car, smart healthcare, smart home, and so on. Academia and industries try to provide the users with convenient services upon seamless technological research and developments. Also, whenever and wherever a variety of services can be used without any limitation on the place and time upon connecting with different types of devices. However, security weaknesses due to integrations of multiple technological elements have been detected resulting in the leakage of user information, account hacking, and privacy leakage, threats to people's lives by device operation have been raised. In this paper, safer communication framework is suggested by device control and user authentication in the mobile network environment. After implementations of registration and authentication processes by users and devices, safe communication protocol is designed based on this. Also, renewal process is designed according to the safe control of the device. In the performance evaluation, safety was analyzed on the attack of protocol change weakness occurred in the existing system, service halt, data leakage, illegal operation control of message, and so on, which confirmed the enhanced speed approximately by 8% and 23% in the communication and verification parts, respectively, compared to the existing system.

• 벤처창업연구
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• 제16권1호
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• pp.113-126
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• 2021

2020년 상반기 코로나19 팬데믹 사태 이후 비즈니스의 세계는 매우 다른 모습으로 변화되었다. 향후 비즈니스의 키워드는 디지털로 수렴하는 비대면(Untact)이라 할 수 있다. 코로나19 사태로 인해 사람들이 온라인으로 쏠리면서 디지털 미디어 기기 활용역량이 중요한 화두로 떠올랐다. 코로나 사태가 모든 접점에서 디지털화가 얼마나 중요한지를 일깨워 준 것이다. 본 연구를 통해 디지털 미디어 기기 및 커뮤니케이션 활용역량이 창업에 있어서도 유의한 영향을 미치는지를 검증하고, 디지털 미디어 기기 및 커뮤니케이션 활용역량이 창업의도에 영향을 미치는 과정에서 위험감수성과 진취성이 매개역할을 할 수 있는지를 규명하고자 한다. 본 연구를 위해 일반인 250명을 대상으로 한 설문조사를 진행하였고, 최종적으로 212개의 유효한 설문지를 수집하였다. 통계기법은 Amos23을 사용하여 분석하였다. 수집된 자료의 분석결과, 디지털 미디어 기기 활용역량과 커뮤니케이션 활용역량은 직접적으로 창업의도에 정(+)의 영향을 주지 못하는 것으로 나타났으나, 기업가정신의 위험감수성을 추구할 때 창업의도를 갖게 된다는 것이 확인되었다. 이를 통해 정보통신 중심의 스마트 사회에서는 기업가정신 및 디지털 미디어 활용역량에 기초한 창업 프로그램 개발을 정책적으로 강화해야 디지털 미디어 기기 활용과 커뮤니케이션 활용역량이 월등한 디지털 세대의 일자리 창출이 확대될 수 있다는 시사점을 도출하였다.