• 대한산업공학회지
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• 제37권1호
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• pp.30-40
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• 2011

In recent years, driver information systems (DIS's) became popular and the use of DIS's increased significantly. A majority of DIS's provides touch-screen interfaces because of intuitiveness of the interaction and the flexibility of interface design. In many cases, touch-screen interfaces are mainly manipulated by fingers. In this case, investigating the effect of touch-key sizes on usability is known to be one of the most important research issues, and lots of studies address the effect of touch-key size for mobile devices or kiosks. However, there is few study on DIS's. The importance of touch-key size study for DIS's should be emphasized because it is closely related to safety issues besides usability issues. In this study, we investigated the effect of touch-key sizes of DIS's while simulated driving (0, 50, and 100km/h) considering driving safety (lateral deviation, velocity deviation, total glance time, mean glance time, total time between glances, mean number of glances) and usability of DIS's (task completion time, error rate, subjective preference, NASA TLX) simultaneously. As a result, both of driving safety and usability of DIS's increased as driving speed decreased and touch-key size increased. However, there were no significant differences when touch-key size is larger than a certain level (in this study : 17.5mm).

• 한국전자통신학회논문지
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• 제6권4호
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• pp.523-531
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• 2011

지하수 자원을 사용하기 위해 설치된 많은 관정들이 사용 후 폐공처리 소홀로 인하여 지하수 오염원이 된다. 또한 폐공된 관정에서는 중금속 및 유기화합물 등의 유해물질이 지하수로 유입 되는 문제점이 발생하여 지하수 수질 악화를 초래한다. 따라서 본 논문에서는 이러한 문제점을 개선하기 위해 유비쿼터스 센서 노드와 GIS 기술을 접목한 u-GIS 환경 하에서 관정의 위치정보와 지하수 센싱 정보를 실시간으로 모니터링하고 분석할 수 있는 지하수 관리 시스템을 설계 및 구현한다. 아울러 UML 2.0을 활용하여 시스템을 이용하는 사용자의 다양한 요구사항, 시스템 내부 모듈들 간의 상호작용 및 데이터 흐름을 분석하여 시스템을 모델링한다. GIS 맵과 웹 환경, 스마트폰 기반의 모바일 단말기 등의 다양한 플랫폼을 통해 원격지에 있는 각 관정의 지하수 상태 및 관정 관련 속성 정보를 모니터링을 하기 위한 사용자 인터페이스를 제공한다.

• 방송공학회논문지
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• 제23권5호
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• pp.622-627
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• 2018

본 논문에서는 소형 카메라와 프로젝터를 이용한 투사형 통합 증강현실 시스템에 대해 소개한다. 물체 인식을 위해 특징점 추출 알고리즘을 사용하며 물체의 깊이 정보는 구조광 방식을 이용해 추출한다. 인식된 물체에 대한 정보를 3차원 공간에 투사할 때, 가상카메라 개념을 이용한 투사 방법을 개발해 특정 점 집합간의 매핑(mapping)을 계산할 필요 없이 투사하고자 하는 대상의 메쉬(mesh)만을 가지고 원하는 위치에 영상을 투사할 수 있도록 일반화 시켰다. 따라서 단순한 평면뿐만 아니라 복잡한 곡면에 대해서도 복잡한 기하계산 없이 원하는 위치에 투사할 수 있게 되었다. 소개되는 내용에서는 소형 카메라와 프로젝터를 탑재한 로봇을 바탕으로 크게 프로젝터-카메라 시스템 캘리브레이션, 인식된 물체의 위치 계산 그리고 가상카메라 개념을 이용한 영상 투사 방법에 대해 설명한다.

• 한국콘텐츠학회논문지
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• 제11권12호
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• pp.986-997
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• 2011

본 연구는 학습을 위한 멀티미디어 활용에 대한 설계 원리 중 멀티미디어 원리와 개인차 원리가 스마트패드 기반 콘텐츠에서도 적용되는지 살펴보았다. 이를 위해 텍스트 기반 콘텐츠와 멀티미디어 원리(텍스트+이미지)를 적용한 콘텐츠를 각각 개발하고, 학습자들을 사전지식이 높은 집단과 낮은 집단으로 분류한 다음, 각 집단을 양분하여 두 종류의 스마트 패드용 콘텐츠를 학습하게 하였다. 각 집단의 인지부하 정도와 학업성취도를 측정한 결과, 멀티미디어 원리와 개인차 원리는 인지부하에 유의한 효과를 가져오지 못하였으나, 학업성취도 차원에서는 모두 유의한 효과를 가져왔다. 이러한 연구결과는 PC 모니터보다 제한된 스마트 패드의 화면 크기, 이미지의 성격, 그리고 학습목표의 성격 등에 기인한 것으로 보여지며, 향후 스마트 패드용 콘텐츠 개발에 있어 시사점을 제공할 수 있다.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2002년도 하계학술대회 논문집 Vol.3 No.2
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• pp.585-588
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• 2002

The USM uses friction between a mobile part (rotor) and a vibration part(stator), which is different from the principle of the conventional motor based on the interaction of electric and magnetic fields. In this thesis, a flat-type $L_1-B_8$ mode USM was designed and fabricated the characteristics of an ultrasonic vibration. The results of fabricated USM are as follows: (1) In case of ultrasonic motor with elastic-body of stainless, when applied voltage, frequency, pressing force of rotor were 50 [V], 27.9 [kHz], 1.5 [N], 5.0[mN m] respectively, the speed of revolution could be presented up to 0 [cm/s]. (2) In case of ultrasonic motor with elastic-body of brass, when applied voltage, frequency, pressing force of rotor were 50 [V], 21.4 [kHz], 1.5 [N], 1.4[mN m]respectively, the speed of rotor revolution was presented up to 0 [cm/s]. (3) The USM of elastic-body of stainless showing 1.17[%], somewhat low, in the maximum efficiency according to torque was superior to the USM of elastic-body of brass showing 0.34 [%]. The Flat-type $L_1-B_8$ mode USM had characteristics of typical drooping torque-speed, large torque and high speed, and operating in both directions by phase reversal.

• 복식
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• 제38권
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• pp.51-72
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• 1998

Futurists objected the existent style, that is the conventional fashion, and took part in these disciplines of fashion to make clothes the instruments being able to represent the individuality. Giacomo Balla and fortunato Depero, pain-ters who in 1915 were to work with Diaghilev's company, were the first to see clothing as a dynamic interfaced between th body and the atmosphere, between physical gestures and the urban context, which could be translated into encounters between forms and colours, volumes and architecture. For them, clothing began to exist as an object and an event, something to be removed from a mainly static conception and made mobile, active. The interaction between movement and clothing was based on the relativity of perception : the appearance and disappearance of the body produced points without dimension or duration which served, as Balla wrote in the Futurist Mnaifesto of Men's Clothing to“renew incessantly the enjoyment and impetuous movement of the body”. The historical achievement in the effort for the reformation of Futurist, Art to Wear. First, for Futurist, clothing is removed from a static conception and focused on dynamics. Second, Balla used asymmetry in men's clothing. Moreover he supposed dynamic men's clothes by using optical intersection. Third, the after image of Chronophotograph represented rapidity. This rhythmic expression is the fore-runner in Optical and Kinetic Art of Visual Art. Fourth, Futurist emphasized flexibility in fashion. They aimed to create‘Clothing Machines’whose parts would interact to aceelerate the real and virtual, inner and outer movement of the human being. Fifth, the variety and short life of cutting skills and colors are focused and‘Fast Substance’in fashion is admitted by Futurists. Futurist concern with clothing was not lim-ited its appearance in terms of cut and colour. What important was also the way it appeared and disappeared according to fashion. It was a“fast substance”, able to reflect rapid, sudden changes of social and aesthetic taste. To reach to the aim of internationalization, Gesamtkunstwerk in our Art to Wear, it is extremely meaningful to examine art fashion which is created under the conception of Gesamtkunstwerk production of avang garde artist in the early 20th century and look at formative conscious of truth, goodess and beauty synthetically which they faced on their works of art.

• Journal of Advanced Marine Engineering and Technology
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• 제39권9호
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• pp.953-958
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• 2015

라즈베리파이는 복수개의 입출력 주변 장치를 지원할 수 있는 신용카드 크기 정도의 단일보드 컴퓨터로 이기종간 상호연동을 위한 완전한 플랫폼으로 사용할 수 있으므로 다양한 응용에 적용될 수 있다. 라즈베리파이에 와이파이 기능을 결합하면 원격통신이 가능하여 무선센서 노드를 구성하는데도 매우 적합하다. 또한 데이터처리와 의사결정을 인공지능에 기반을 둘 수 있으므로 화재 감시나 화재발생 신뢰도 판단 등과 같은 예제를 이미 개발된 테스트베드에서 수행해 볼 수 있다. 본 논문은 건물 내의 능동적 화재안전감시를 위한 센서 웹노드로서 라즈베리파이 이용에 대한 연구 결과이다. UV 불꽃감지센서가 촛불 크기 정도의 불꽃을 감지하면 라즈베리파이는 GCM 서버를 통해 지정된 스마트폰으로 현장상황을 알리는 푸쉬 메시지를 보낸다. 모바일 앱은 오작동 알람 여부를 판별하기 위한 실시간 비디오 영상을 제공할 수 있도록 개발되었다. 만약 긴급 상황이라면 긴급통화로 즉시 도움을 요청할 수 있도록 구현하였다.

• 자원환경지질
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• 제26권1호
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• pp.55-65
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• 1993

Udo Island, some 3 km off the coast of Sungsan Peninsula at the eastern promontory of Cheju Island, occurs in such a regular pattern on the sequences which reprent an excellent example of an eruptive cycle. The island comprises a horseshoe-shaped tuff cone, a nested cinder cone on the crater floor, and a lava delta which extends over northwest from the moat between two cones. The volcanic sequences suggest volcanic processes that start with emergent Surtseyan eruption, progress through Strombolian eruption and end with lava effusion followed by reworking of smooth tephra on the tuff cone. Eruptive environment and hydrology of vent area in the Udo tuff cone are poorly constrained because the stratigraphic units under the tuff cone are unknown. It is thoughl, however, that the tuff cone could be mainly emergent because the present cone deposits show no evidence of marine reworking, and standing body of sea water could play a great role. The emergent volcano is characterized by distinctive steam-explosivity that results primarily from a bulk interaction between rapidly ascending magma and a highly mobile slurry. The sea water gets into the vent by flooding accross or through the top or breach of tephra cone. Udo tuff cone was constructed from Surtseyan eruption which went into with tephra finger jetting activities in the early stage, late interspersed with continuous uprush activities and proceeded to only continuous uprush activities in the last. When the enclosure of the vent by a long-lived tephra barrier would prevent the flooding and thus allow the vent to dry out, the Surtseyan eruption ceased to transmit into Strombolian activities, which constructed a cinder cone on the crater floor of the tuff cone. The Strombolian eruption ceased when magma in the conduit gradually became depleted in gas. In the case of Udo, the last magmatic activity was Hawaiian-type (and/or fountain) which accumulated basalt lava delta. And then the loose tephra of the tuff cone reworked over the moat lava and the northeastern flank.

• 인터넷정보학회논문지
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• 제17권3호
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• pp.67-73
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• 2016

모바일 서비스와 교육 보조 로봇이 발달함에 따라, 로봇은 우리의 삶의 일부가 되었고 교육 보조 로봇은 선생님을 보조해 학생들의 교육과 학습에 참여하고 있다. 본 논문은 교육 보조 로봇의 자율성의 정도를 표시하는 자율성 지수를 측정하기 위한 방법을 규정한다. 자율성은 사람의 개입 없이 현재 상태 및 센서 값을 기반으로 주어진 작업을 수행하는 능력이다. 교육 보조 로봇의 자율성 지수는 작업 수준과 사람의 개입 수준으로 구성되며 1단계에서부터 10단계로 정의한다. 제안 방식은 지능형로봇표준포럼(KOROS) 표준으로 채택이 되었으며 해당 표준은 자율적으로 학생들을 지도하는데 활용이 가능하다. 향후 교육 보조 로봇을 활용한 교육 서비스에 큰 혜택을 가져올 것으로 예상하며 그 활용 분야 역시 교육 발전에 크게 이바지할거라 기대한다.

• 디자인학연구
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• 제20권2호
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• pp.5-16
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• 2007

The main objective of our research is analyzing user's emotional changes while using a product, to reveal the influence of usability on human emotions. In this study we have extracted some emotional words that can come up during user interaction with a product and reveal emotional changes through three methods. Finally, we extracted 88 emotional words for measuring user's emotions expressed while using products. And we categorized the 88 words to form 6 groups by using factor analysis. The 6 categories that were extracted as a result of this study were found to be user's representative emotions expressed while using products. It is expected that emotional words and user's representative emotions extracted in this study will be used as subjective evaluation data that is required to measure user's emotional changes while using a product. Also, we proposed the effective methods for measuring user's emotion expressed while using a product in the environment which is natural and accessible for the field of design, by using the emotion mouse and the Eyegaze. An examinee performs several tasks with the emotion mouse through the mobile phone simulator on the computer monitor connected to the Eyegaze. While testing, the emotion mouse senses user's EDA and PPG and transmits the data to the computer. In addition, the Eyegaze can observe the change of pupil size. And a video camera records user's facial expression while testing. After each testing, a subjective evaluation on the emotional changes expressed by the user is performed by the user him/herself using the emotional words extracted from the above study. We aim to evaluate the satisfaction level of usability of the product and compare it with the actual experiment results. Through continuous studies based on these researches, we hope to supply a basic framework for the development of interface with consideration to the user's emotions.