• 한국정보과학회논문지:컴퓨팅의 실제 및 레터
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• 제16권12호
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• pp.1209-1213
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• 2010

최근 모바일 장치의 기능이 발전하면서, 스마트폰에 대한 관심이 증가하고 있다. 스마트폰은 휴대성이라는 장점을 가지고 있음에도 불구하고, 그 기기의 크기가 작아 사용자 인터페이스 관점에서 불편함이 많이 있었다. 본 논문에서는 이 문제점올 해결하기 위해 안드로이드 모바일 플랫폼에서의 프레임버퍼 구조를 수정하여, 동적으로 해상 전환시켜 크기가 큰 외부 디스플레이 장치로 디스플레이를 전환하고, 기존의 휴대폰은 리모콘으로 활용할 수 있는 사용자 인터페이스 전환 기술을 개발하였다.

• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2007년도 추계 종합학술대회 논문집
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• pp.817-821
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• 2007

제한된 배터리를 가지고 있는 내장형 시스템에서 전력을 최소화하여 제한된 전력을 오랫동안 사용하는 기술은 중요한 문제로 인식되어 왔다. 최근 내장형 시스템은 대형 TFT-LCD와 터치스크린을 장착하면서 그에 따른 전력소비가 더 증가하고 있다. 본 논문에서는 GUI에서 전력소모를 감소할 수 있는 방안인 프레임버퍼 모니터링을 연구하였다. 프레임버퍼 모니터링 기법은 화면의 퀄리티(Quality)를 보장하는 범위 내에서 Refresh-rate과 Backlight을 조절하여 LCD에서 전력 소모를 줄이는 방법이다.

• Journal of Information Technology Applications and Management
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• 제23권3호
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• pp.49-59
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• 2016

Rapid technological advancements and widespread adoption of smart phones in recent years provide students with new opportunities for getting knowledge and making researches in innovation century. As the penetration of smart phone devices in education increases, there is a large growth in the use of these devices especially among the youth. In spite of increasing importance of smart devices in education, the significant features of these technology devices for general learning have not been experientially addressed. In this study we are going to investigate the comparison of smart phone devices and find the necessary conditions for using mobile devices as an educational tool by a conjoint method. There will be five attributes: screen size, batter type, mobile OS, memory capacity and price. By surveying we got the results which showed us the respondents' desire of using specific smart phone; thus, we defined that screen size attribute is the most important device characteristic.

• ETRI Journal
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• 제21권4호
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• pp.83-93
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• 1999

This paper examines the correlations between user characteristics and their perferences for two selected features of Web-based OPAC systems. User characteristics identified in this study were age, gender, educational status, computer skills and OPAC experience. Usability features included interaction styles, character and image on screen, browsing and navigating style, screen layout, and ease of learning, whereas availability features attended to availability of information, quality of information and up-to-date information. Individual variables and features are described, and the correlation between the variables and the features are explored using Pearson's correlation coefficient(r). Although based on a small-scale sample survey, a considerably large number of statistically significant correlations were found between the users' characteristics and the selected evaluation features of interactive Web-based OPACs. From these observations, it seems to be suitable to recommend that system designers should make a more considered appraisal of the users' demographic characteristics in the design of the new generation of OPAC such as in user-tailored interactive Web-based OPAC systems.

• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송공학회 2009년도 IWAIT
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• pp.755-759
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• 2009

This paper proposes an HDR display system using multi-projectors for presentation of HDR contents to multi-users. An HDR image is resolved by luminance and the resolved images are assigned to several projectors. The proposed system projects the HDR contents onto a large screen, and the system can display the HDR contents to multi-users. The proposed system realized to output the broad luminance by emitting the light of multi-projectors onto the same screen. In addition, tonal steps of the proposed system increase so that other projectors cover the tonal steps in the region where the dynamic range is expanded. In this paper, we indicate an effectiveness of the proposed system.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2000년도 제1회 학술대회 논문집
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• pp.107-108
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• 2000

We propose the method which is possible to fabricate the electrodes with the fine pattern and low resistance by photolithography and electroplating. The widths of pattern fabricated were 30, 50, 70 and 100um and the thickness could be up to $10{\mu}m$. The resistivity of the copper electrode electroplated was below $2.0{\mu}{\Omega}$ cm which is about half of photosensitive silver electrode. Dielectric layer was coated on the electrodes by screen printing and the pores harmful to the discharge were not formed after heat treatment. In the viewpoint of resistance and patterning, this method has much higher potential for large area display than other methods like screen printing, photosensitive conductive paste method and sputtering.

• 한국세라믹학회지
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• 제51권4호
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• pp.344-349
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• 2014

$RuO_2$-based high frequency thick-film resistor paste was printed at the speed of 10, 100, 300 mm/sec on the AlN substrate, and then sintered at between 750 and $900^{\circ}C$. The sintered thick films were characterized in terms of printing and sintering conditions. With increasing printing speed, the thickness and roughness of sintered film increased. The resistance of the thick film resistor was reduced by increasing the printing speed from 10 to 100 mm/sec, but did not significantly change at 300 mm/sec speed. With increasing sintering temperature, the surface roughness and thickness of sintered resistor film decreased. The reduction rate was large in case of fast printed resistor. The resistance of the resistor increased up to $800^{\circ}C$ with sintering temperature, but again decreased at the higher sintering temperature.

• 한국자원식물학회지
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• 제3권2호
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• pp.129-138
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• 1990

Now, many anticancer drugs are applying in the clinical side, but there is no conclusive effect of such a chemotherapy. Development ofnovel clinical useful anticancer drugs would be dependenton the screen-ing system and its test sample sources. So, it is necessary to outlinesome background on the tumor systems which have been used for screen-ing. This paper describes mainely on National Cancer Institute (NCI)program for anticancer screening systems, because the large number ofcompounds have been screened at NCI prograB and their relationship ofassesment between experimental animals and clinical Patients has beendiscussing and the uniform screefing protocols for various tumorsystens. At the end of this paper, some literatures of antitunor substances from various higher Plants at our laboratory are showed.

• 설비공학논문집
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• 제12권10호
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• pp.894-900
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• 2000

The experimental study for performance improvement of aluminum/freon22 grooved heat pipe was carried out. Arterial wick was used for performance improvement of heat pipe. The experimental result was compared with screen covered grooved wick heat pipe. And also, performance test of grooved wick thermosyphon inserted straight wire in the center of grooved pipe was carried out. This result was compared with the performance test result of grooved wick thermosyphon. The operation limit of artery inserted grooved heat pipe was slightly extended, but thermal resistance of this heat pipe was twice as large as that of screen covered grooved heat pipe. In case of thermosyphon, the operation limit of grooved thermosyphon inserted straight wire in the center of grooved pipe was slightly extended, but thermal resistance was increased, comparing with that of the grooved thermosyphon.

• 한국전산구조공학회논문집
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• 제30권3호
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• pp.231-238
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• 2017

3D 기반의 BIM 도면을 활용을 통해 다양한 건설 시뮬레이션이 가능하다. 이러한 BIM을 기반으로 강력한 몰입환경이 수반되는 가상현실 공간에서 실증실험이 가능한 시뮬레이션 시스템 구축사례가 국내에는 전무한 상황이다. 본 논문에서는 다양한 의사결정 및 가상건설 시뮬레이션이 가능하도록 BIM 도면을 기반으로 3D 기반의 강력한 몰입환경을 제공하는 다면(Multi Screen) 기반의 시뮬레이션 시스템 개발사례를 제시하였다. 구축된 시뮬레이션 실험실은 4K 이상의 해상도를 기반으로 대규모의 3면 디스플레이 공간내에서 다양한 Haptic 장비를 활용해 도면검토, 재난/재해시뮬레이션, 극한건설, 도시계획설계 등이 가능하다. 또한 기존의 BIM 소프트웨어와 완벽한 호환이 가능하여 데이터의 실시간 변환없이 대용량의 도면 등을 검토할 수 있다.