• 제어로봇시스템학회:학술대회논문집
• /
• 제어로봇시스템학회 1989년도 한국자동제어학술회의논문집; Seoul, Korea; 27-28 Oct. 1989
• /
• pp.322-326
• /
• 1989

This paper describes design procedure of suboptimal control to minimize a performance index which is represented as sum of square output error and the heat input power in arc welding process. Heat input and temperature of a fixed point on the surface of the material are concerned as input and output of the process, repectively. The suboptimal control law considered here in is a proportional plus integral type and is implemented by using only the output variables available from sensor which is also optimally located in a fixed point w.r.t. a moving weld touch.

• 한국공작기계학회:학술대회논문집
• /
• 한국공작기계학회 2001년도 춘계학술대회 논문집(한국공작기계학회)
• /
• pp.192-196
• /
• 2001

This work describes the modeling of cutting process for feedback control based on signal processing in end-milling. Here, cutting force is used to design control model by a variety of schemes which are moving average, ensemble average, peak value, root mean square and analog low-pass filtering. It is expected that each model offers its own peculiar advantage in following cutting force control.

• 대한수학회지
• /
• 제36권4호
• /
• pp.663-677
• /
• 1999

This work is concerned mainly with the variational problem on an immersion x:M $\rightarrow$} $E^4$ . A new approach is introduced depends on the normal variation in any arbitrary normal direction in the normal bundle. The results of this work are considered as a continuation and an extension to that obtained in [1], [2] and [3], [4] respectively. The methods adapted here are based on Cartan's methods of moving frames and the calculus of variations.

• 한국정보디스플레이학회:학술대회논문집
• /
• 한국정보디스플레이학회 2002년도 International Meeting on Information Display
• /
• pp.743-745
• /
• 2002

We reported the possibility of color filtering of white method for achieving full-color displays using OELDs. Here, we fabricated white organic electroluminescent devices (OELDs) and drove moving images with a 384${/times}$160 pixel.

• 한국정보디스플레이학회:학술대회논문집
• /
• 한국정보디스플레이학회 2002년도 International Meeting on Information Display
• /
• pp.449-451
• /
• 2002

We reported the algorithm of driving scheme that enhances moving picture property by improving gray-to-gray response time. Here, we report result of simulation for estimation of driving voltage to reduce response time, and experimental result. We investigated optimization of algorithm so that minimum size of LUT can support to reducing the gray-to-gray response time within 1 frame period, and with single algorithm it is possible to apply the algorithm to various kinds of LC material. So in our system there is no external EEPROM.

• 한국정보디스플레이학회:학술대회논문집
• /
• 한국정보디스플레이학회 2002년도 International Meeting on Information Display
• /
• pp.191-192
• /
• 2002

We reported pushing of colloidal particles by a moving isotropic-nematic phase boundary. Here, we report tailoring the structure of 3-dimensional networks formed by these particles by adjusting the rate of phase transition and by application of an electric field. The resulting networks affect the electro-optic performance of liquid crystal devices.

• 디지털콘텐츠학회 논문지
• /
• 제18권6호
• /
• pp.1017-1024
• /
• 2017

기술의 발달은 콘텐츠 미디어의 변화를 가져왔다. 구술 시대의 음성, 소리 미디어에서 시작하여 텍스트, 페인팅을 거쳐, 사실성의 사진 미디어, 이미지에 사운드를 더한 영상 미디어의 발달로 이어져 왔다. 여기서 생각해보아야 할 것은 기술의 발달로 인한 미디어의 변화라는 일방적 영향만이 아니라, 어떤 세대가 어떤 미디어를 접하느냐에 따라 정보의 이해도 및 집중력, 몰입도 등이 달라진다는 것이다. 이에 디지털을 주미디어로 활용하고 있는 디지털 네이티브 세대에 주목하게 된다. 디지털 네이티브 세대의 특징으로는 시각정보를 빠르게 처리하며, 멀티태스킹이 가능하고, 분할주의 능력을 지니고 있는 세대로 연구된 바 있다. 이에 본 논문에서는 디지털 네이티브 세대를 위하여 움직이는 픽토그램을 제안, 픽토그램 중에서도 한계성을 보이고 있는 비상구 픽토그램을 움직이는 픽토그램으로 제안하였으며, 설문지를 통하여 근거를 마련하였다. 디지털 네이티브 세대 특성에 맞춘 새로운 동적 픽토그램, 더 나아가 인터랙티브 동적 픽토그램은 생각하고 연구되어야 하는 분야로 본 논문은 첫 발을 내딛는 연구라고 볼 수 있다.

• 한국멀티미디어학회논문지
• /
• 제10권1호
• /
• pp.117-127
• /
• 2007

멀티미디어 데이터의 활용가치가 높아짐에 따라 멀티미디어 정보의 의미적인 인식과 검색 방법에 대한 필요성이 증대되고 있다. 본 논문에서는 비디오 내 이벤트에 대한 객체 움직임 요소간의 의미표현을 위해 모션 온톨로지(Motion Ontology)를 구축하고 적용한다. 본 연구에서 제안한 방법은 워드넷(WordNet)내 동사어휘들 중 장소 이동이나 방향등과 같이 움직임을 잘 표현하는 동사들에 대해 분류하여 계층구조로 표현하고, 또한 이를 OWL/RDF(S)로 작성한다. 이는 온톨로지(Ontology)의 IS-A관계와 동의어관계가 가진 특징을 이용한 추론을 위함이며, 온톨로지(Ontology)에 기반하여 비디오 데이터를 인덱싱함으로써, 의미적 표현을 가능하게 한다. 본 연구에서 비디오 데이터에 대하여 의미적 검색을 수행한 결과, 기존 키워드 기반 검색에 비해 정확률 측면에서 약 10% 정도 향상되었다.

• 한국실내디자인학회논문집
• /
• 제20권6호
• /
• pp.173-182
• /
• 2011

These days, Emotional Design is on the sustainable development through activity study thogh, until now, the study proceed too far with Sensibility Ergonomics applied to SD. However, on this paper, the study would be make progress through GSD that it applied to Verb. For this reason, applied to Emotional Design consideration of theory through JOAN MEYERS-LEVY's papaer titled "The Influence of Ceiling Height", Laban Movement Analysis and Aspect of Semiotics and then judgement of GSD would be make progress through experiment to collection of Emotional Vocabularies and evaluation of body movement. There is a method of analysis by using statistical program such as SPSS 18.0 and it would have validity of analysis. Here is a result of this study. According to heights of ceiling types(2.4M, 3.0M) there are differences between behavior of Figure Attachment, Emotional Vocabularies of the event and Body Movement. While the Figure Attachment has a tendency to restricted scope, CH has a tendency to make attachment within the scope. You could see the Negative Adjective for Emotional Vocabularies at CL and the Positive Adjective ranges at the CH. Basic body movement for passive, 'moving' and 'stretching' as shown at CL more than the CH. For active movement which has purpose, 'moving the weight' and 'stretching' as shown at CH more than at CL.

• 천문학회지
• /
• 제40권4호
• /
• pp.179-182
• /
• 2007

Dynamical friction plays an important role in reducing angular momenta of objects in orbital motions. While astronomical objects usually follow curvilinear orbits, most previous studies focused on the linear-trajectory cases. Here, we present the gravitational wake due to, and dynamical friction on, a perturber moving on a circular orbit in a uniform gaseous medium using a semi-analytic method. The circular orbit causes the density wakes to bend along the orbit into asymmetric configurations, resulting in the drag forces in both opposite (azimuthal) and lateral (radial) directions to the perturber motion, although the latter does not contribute to the orbital decay much. For a subsonic perturber, the bending of a wake is only modest and the resulting drag force in the opposite direction is remarkably similar to the linear-trajectory counterpart. On the other hand, a supersonic perturber is able to overtake its own wake, possibly multiple times, creating a high-density trailing tail. Despite the dramatic changes in the wake morphologies, the azimuthal drag force is in surprisingly good agreement with the formulae of Ostriker for the linear-trajectory cases, provided $V_pt=2R_p,\;where\;V_p\;and\;R_p$ are the velocity and orbital radius of the perturber, respectively.