• 한국정보통신학회논문지
• /
• 제21권6호
• /
• pp.1203-1211
• /
• 2017

본 논문은 유연관절로봇의 추종성능과 정합과 비정합 외란 모두에 대한 강인성을 향상시키기 위한 강인한 제어기를 제안한다. 제안된 제어기는 백스테핑 외란관측기(DOB), 수동성기반 제어기(PBC)와 적분슬라이딩모드 제어기(ISMC)가 백스테핑기법 형태로 구성되어 있다. 백스테핑 DOB는 링크측의 비정합 외란을 고려하는데 사용되며 모터측의 기준입력을 제공하는 역할을 한다. IDA-PBC는 모터측의 추종제어를 수행하며 적분슬라이딩모드제어와 결합될 때 공칭제어기의 역할을 하며 전체 공칭제어시스템의 안정도를 보장받도록 한다. 반면에 적분슬라이딩모드제어는 정합조건을 만족시키는 모터측의 외란의 영향을 제거하는데 사용된다. 링크측의 제어기를 설계하는데 있어서는 PD타입의 임피던스제어기와 DOB가 결합됨으로써 강인한 제어특성과 함께 모터측의 기준입력에 적합한 연속적인 입력의 제공이 가능하도록 하였다.

• 한국게임학회 논문지
• /
• 제16권5호
• /
• pp.159-168
• /
• 2016

<포켓몬GO>는 나이언틱랩스와 닌텐도가 협력하여 만든 증강현실게임이다. 이 게임은 위치 정보, 스마트폰의 영상인식 기술, GPS의 위치 추적 기술 등이 응용되는 증강현실기술과 <포켓몬스터>라는 걸출한 IP가 융합되어 만들어진 새로운 형태의 AR형 RPG다. <포켓몬GO>가 세계적으로 주목 받고 있는 성공요인은 AR기술과의 융합에 있지만, 그보다 더 중요한 것은 20년 동안 스토리를 성장시켜 온 <포켓몬스터>의 활용에 있다는 사실을 확인하였다. 따라서 <포켓몬GO>의 인기요인은 전통문화원형을 활용한 인문학적 상상력과 AR게임기술의 공학적 상상력이 어우러지는 융합콘텐츠의 성공적인 스토리텔링의 결과라는 사실을 인식할 수 있었다.

• 설비공학논문집
• /
• 제29권9호
• /
• pp.472-481
• /
• 2017

Radiant floor heating systems have been used as common heating supply systems in most residential buildings in Korea. Since the system uses a floor as thermal storage, proper control strategy should be adopted to avoid over-or under-heating problems. So far, studies related to control of the floor heating system have been conducted based on computer simulations. The active layer in TRNSYS is known for its usability as a floor heating system model and is integrated with the TRNSYS building model (Type 56). However, floor heating system simulations with the active layer are operated only if pre-defined minimum mass flow rate is ensured. This study proposes a simple RC (Resistance-Capacitance) model for radiant floor heating systems. Model parameters such as Rs and Cs are defined by optimization. The active layer, in this study, is used as the target system to search for optimal values. A TRNOPT optimization tool was used to conduct optimization under given simulation conditions. The RC model with optimal parameters are tested in other mass flow rates that were not used during optimization. Results reveal the RC model describes the active layer with successfully optimized model parameters. The RC model has fewer model limitations, and is expected to be used for various target systems, e.g. experimental data of a real radiant heating system.

• 디지털콘텐츠학회 논문지
• /
• 제18권6호
• /
• pp.1213-1216
• /
• 2017

최근 기후변화로 인한 재난환경의 불확실성 증가로 융복합화, 입체화되면서 재난으로 인한 영향도 대형화되고 재난유형의 다양화와 2차적 피해로 다양화되고 있다. 본 논문에서는 지능정보기술과 빅데이터 분석을 통한 ICBMS을 재난안전관리 전 과정에 적용하여 사고나 재난으로부터 인간 사회 경제 환경 피해 등을 최소화하고 미래 예측기술에 의한 예측평가와 재난정보수집분석 및 통제기술 확보에 의한 예방, 몸으로 기억하는 교육과 훈련 확대에 의한 대비, 재난대응 무인화 기술 고도화에 의한 대응, 지역공동체 환경생태계 조성에 의한 복구와 지능정보 기술에 의한 조사와 분석의 6단계의 재난안전관리 4.0에 대하여 알아본다. 또한 4차 산업혁명과 빅테이터 적용에 있어서의 기술적 한계와 문제점을 분석하여 극복할 대안과 전략방안을 제시하였다.

• 한국수자원학회논문집
• /
• 제37권4호
• /
• pp.329-339
• /
• 2004

본 연구의 목적은 유역에서의 강우-유출 과정 모의를 위해 GIS에 기반을 둔 2차원 강우-유출 해석모형의 개발이다. 본 연구가 추구하는 세부 목표는 첫째, 강우--유출해석을 위한 2차원 모형을 개발하고, 둘째, 개발된 모형과 GIS를 연계하는 것이다. 모형에 포함된 수식화 과정은 다음의 네 가지로 요약학 수 있다. 시$\cdot$공간적으로 분포하는 강우의 처리과정과 침투과성, 유역의 유출을 추적하기 위한 1, 4, 8방향 흐름 추적과정, 그리고 하도 추적을 위한 1차원 해석과정이다. 개발된 모형에 Monte Carlo 모의기법을 결합하여 추계학적 모형을 구성하였다. 모형에 필요한 입력자료(고도, 토양도, 강우자료 등)의 구축과 모의결과의 도시를 위해 Arc/Info와 ArcView를 연계ㆍ활용한 시스템을 구성하였다.

• Journal of Acupuncture Research
• /
• 제30권5호
• /
• pp.139-153
• /
• 2013

Background or Objectives : The purpose of this study is to review oriental medicine journal clinical study in human that have been utilize Electroacupuncture in Korea. Methods : We investigated clinical studies in relation to electroacupuncture through 70 articles from OASIS excluded studies used rats and reviews. Results : Of 162 articles, totally 70 articles selected. There was differences ways of stimulation. In 70 articles, 19 type of instrument is used. About Stimulation time, 15 minutes form 40 percent, 20 minute form 37.1 percent, 30 minute form 11.4 percent. About stimulation intensity, there was 20 articles is unknown intensity. Only 21 articles present intensity by value. In frequency, 2 Hz frequency is used the most, 21 articles. Below 10 Hz frequency is used 54.2 % in 70 articles. There was 7 articles is unknown frequency. Conclusions : The result of this study could provide useful information of field of electroacupuncture is used in oriental medicine. Studies of electroacupuncture should be carried out in many different ways.

• 한국주거학회:학술대회논문집
• /
• 한국주거학회 2000년도 학술발표대회논문집
• /
• pp.91-95
• /
• 2000

With 106 detached houses where the aged people live alone, this study was conducted to perform a location survey of their residential environment. The result of this study is summarized as follows: While the surveyed houses' safety, sanitation and convenience appeared to be positive, with respect to the conditions of location, 73％ of the surveyed houses did not meet the requirement for comfort. The average area of each space indicated that the bedding room was 12.05$m^2$, the living room 14.71$m^2$, the kitchen 9.06$m^2$, the bathing room 4.05$m^2$, and the rest room 2.59$m^2$. Then, 93.3％ of the bedding rooms had the doorsill. Also, 97.2％ of the surveyed houses had retrievable space. The form of their living room door showed a hinged door(54.5％) and a sliding door(45.5％) which were similar with each other. The finished material was that wood accounted for 42.6％ which was highest. The cooking table form of kitchen was mainly "\ulcorner"-shaped(49.5％) and "\ulcorner"-shaped(48.5％) which were highest, and their average height appeared to be 815mm. The fuel used for kitchen was that gas accounted for 93.3％, while 95.2％ of the surveyed houses was not equipped with any gas-warning device. 75.5％ had an integrated type of bath room and toilet. In addition, the stepped difference between the bath room and other space was that 70.8％ had the difference, but they had no a satisfactory sliding-prevention device(Not for 91.6％) or heating system(Not for 92.9％).stem(Not for 92.9％).

• The Korean Journal of Ecology
• /
• 제22권2호
• /
• pp.69-77
• /
• 1999

Secondary vegetation. the holistically integrated system of nature and human being, is the complicated ecosystem that is composed of natural and man-created factors. Understanding the ecological function of secondary vegetation supplies us many important informations for sustainable landscape management and ecological restoration planning. In this research, we tried to examine the shape effect of vegetation patch on early structure of populations of pine and oaks. Moreover. we also tried to clarify the ecological functions of patch edge by exploring the patch effect on germination using patch index. In addition, we present the landscape structure of man -made vegetation of our study area, and setting experimental design of research. Vegetation landscape of study area is typical human disturbed landscape mainly composed of disturbance patches. Vegetation types of graveyard and managed pine forest were controlled by periodically repeated management. However, current seedlings of pine occurred well at both vegetation types. Presence of both saplings were more controlled in managed pine forest (PDM) and graveyard (G) than those of undergrowth (PD) and forest edge (FE) with canopy trees. The number of pine seedlings increased with patch size and patch perimeter. That of oak seedlings was, however, not significantly different. Larger graveyards provided higher light availability for germination of pine seedlings. We think, however, most seedlings of both species in the large sized graveyards without shade will die more easily than that of small sized ones before rainy summer. Relationships between patch shape and germination of two woody species cannot be exactly explained enough yet in these results. More informations on spatial interaction of the total species with differently sized patches are necessary to solve the concept of patch effect on species colonization.

• 한국환경보건학회지
• /
• 제32권1호
• /
• pp.71-76
• /
• 2006

Treatment performance and microbial community structure were investigated in water-soluble cutting oil treatment process using biological activated carbon. DOC removal in BACI column at $15^{\circ}C$ was higher than at $25^{\circ}C$, but those of BAC3 column after 60days was high at$25^{\circ}C$. Also, quinone content of first-step reactors at $25^{\circ}C$ and $15^{\circ}C$ was much the same, but those of the third-step reactor at $25^{\circ}C$ was higher than at $15^{\circ}C$. The dominant type of two apparatus was ubquinone (UQ)-l 0 followed by UQ-8. Menaquinones were detected from $25^{\circ}C$ apparatus and effluent. This suggested that DOC removal at $25^{\circ}C$ was advanced degradation by attached microorganisms on the activated carbon surface. The DOC removal in long-term activated carbon apparatus increased with going in BAC3 column. This indicated the influent of POC was a result of DOC removal efficiency decrease. Integrated DOC removal from start point in experiment to break point and quinone content were showed a tendency of increasing with going last-step activated carbon apparatus. Therefore, the biological activated carbon apparatus used by this study was effective treatment process in contaminated groundwater by water-soluble cutting oil.

• JSTS:Journal of Semiconductor Technology and Science
• /
• 제15권1호
• /
• pp.41-47
• /
• 2015

In this paper, the effective electron Schottky barrier height (${\Phi}_{Bn}$) of the Ni silicide/n-silicon (100) interface was studied in accordance with different thicknesses of the antimony (Sb) interlayer for high performance n-channel MOSFETs. The Sb interlayers, varying its thickness from 2 nm to 10 nm, were deposited by radio frequency (RF) sputtering on lightly doped n-type Si (100), followed by the in situ deposition of Ni/TiN (15/10 nm). It is found that the sample with a thicker Sb interlayer shows stronger ohmic characteristics than the control sample without the Sb interlayer. These results show that the effective ${\Phi}_{Bn}$ is considerably lowered by the influence of the Sb interlayer. However, the current level difference between Schottky diodes fabricated with Sb/Ni/TiN (8/15/10 nm) and Sb/Ni/TiN (10/15/10 nm) structures is almost same. Therefore, considering the process time and cost, it can be said that the optimal thickness of the Sb interlayer is 8 nm. The effective ${\Phi}_{Bn}$ of 0.076 eV was achieved for the Schottky diode with Sb/Ni/TiN (8/15/10 nm) structure. Therefore, this technology is suitable for high performance n-channel MOSFETs.