• Journal of Institute of Control, Robotics and Systems
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• v.1 no.2
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• pp.71-77
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• 1995

The control effectiveness and disturbance suppressibility are mainly governed by a left eigenstructure of a system. In this paper, a control algorithm which uses an output feedback eigenstructure assignment scheme is proposed in order that a desired closed-loop system has the specified degree of controllability and/or degree of disturbance suppressibility. To do this, a modal and a gross disturbance suppressibility measures are proposed. A modified version of Hamdan and Nayfeh's modal controllability measure is also presented. The validity and usefulness of the proposed measures and the controller design algorithm are illustrated by designing a controller for a third-order system as an example.

• Journal of the Korean Applied Science and Technology
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• v.7 no.1
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• pp.31-36
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• 1990

Synthesizing octylphosphate(OTP) from phosphorus pentoxide with n-octyl alcohol, octylphosphatethiourea(OTPU) was prepared from OTP with thiourea. After flame retardant finishing OTPU to acrylic fabrics, nylon taffeta and tetron taffeta, the physical properties, such as tear strength and flame retardancy were measured. As the results of the measurement, OTPU was found to be a good flame retardant having softness using to synthetic fibers.

• Journal of the Korea Institute of Military Science and Technology
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• v.7 no.3 s.18
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• pp.140-148
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• 2004

Fault detection and isolation(FDI) and reconfigurable flight control system provide better survivability even though actuator faults occur. In this study, a new fault detection and isolation algorithm is proposed using fuzzy logic. When the FDI system detects the actuator fault, the fuzzy logic investigates the state variables to find which actuator has fault. Proposed fuzzy detection algorithm detect not only a single fault but also multiple faults. After detecting the fault, the reconfigurable flight control system begins operating for compensating the effects of the fault. A numerical simulation using six degree-of-freedom nonlinear aircraft model is performed to verity the performance of the proposed fault detection and isolation scheme.

• Information and Communications Magazine
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• v.33 no.11
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• pp.50-57
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• 2016

본고에서는 차세대 항공시스템의 핵심요소 중 하나인 항공기내 무선통신 (WAIC: Wireless Avionics Intra-Communication) 시스템의 연구동향과 이를 군용기내 무선통신 시스템에서 응용하는 방안에 대해 알아본다. 먼저 항공기 내 유선 통신네트워크 기술 동향을 살펴본 뒤, 항공기내 무선통신 시스템에 사용할 수 있는 무선 표준 기술로써 IEEE 802.11, Bluetooth, IEEE 802.15.4 등의 무선통신 기술을 소개한다. 이후 현재 논의되고 있는 항공기내 무선통신 시스템을 위한 주파수 대역과 트래픽 모델을 소개한다. 또한 현재 논의되고 있는 항공기내 무선통신 시스템을 군용으로 응용할 때 고려해야 하는 점을 소개한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2000.10b
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• pp.1569-1572
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• 2000

본 연구에서는 가상현실을 이용한 의료 기술로서 손 재활 치료 시스템을 설계한다. 손 재활 치료는 직접적인 손의 손상으로 인한 환자뿐만 아니라 뇌손상이나 다른 신경의 손상을 입은 환자 등 다양한 원인에 의하여 발생한 환자들에게 필요하다. 많은 경우에, 손재활 치료를 통하여 운동력의 향상뿐만 아니라 판단력이나 사고력을 높이는 것까지 병행되어야 한다. 본 연구에서는 손재활 치료를 돕기 위하여 햅틱기술과 게임요소를 포함하는 컨텐트를 가진 시스템을 설계하여 테스트한다.

• Genomics & Informatics
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• v.2 no.4
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• pp.167-173
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• 2004

The main mechanism of evolution is that biological entities change, are selected, and reproduce. We propose a different concept in terms of the main agent or atom of evolution: in the biological world, not an individual object, but its interactive network is the fundamental unit of evolution. The interaction network is composed of interaction pairs of information objects that have order information. This indicates a paradigm shift from 3D biological objects to an abstract network of information entities as the primary agent of evolution. It forces us to change our views about how organisms evolve and therefore the methods we use to analyze evolution.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• v.2
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• pp.307-310
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• 2006

In this paper, we design a prototype service in Telematics environment for providing safety warning notification at crooked roads efficiently using wireless sensor network. Through this study, we 1) analyze several requirements to be satisfied in the services, 2) design and implement the service architecture based on the requirements.

• Proceedings of the Korea Information Processing Society Conference
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• 2002.11a
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• pp.471-474
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• 2002

본 논문은 온라인 VR 게임 엔진 개발의 일환으로 임의의 형태의 스크린에 대한 프로젝션 디스플레이 할 때 발생하는 왜곡현상을 자동으로 보정하는 시스템 구현 방법에 관한 것이다. 기존에는 모니터와 컴퓨터로 이루어진 일반적인 아케이드 게임의 형태로부터 다양한 VR 장비들과 다수의 사용자가 온라인상에서 게임을 즐기는 멀티 유저용 게임의 형태에 이르기까지 다양한 종류의 상품이 나와 있다. 새로운 VR 기술들이 점차 저가화 됨에 따라 사용자에게 새로운 몰입형 아케이드 게임환경을 제공하기에 이르렀다. 본 논문에서는 프로젝션 기법을 사용하여 단일화 된 디스플레이 스크린을 사용하지 않고 임의의 형태의 스크린에 대한 프로젝션 디스플레이 시스템을 구현하는 방법을 제안하여 협소한 공간에서도 게임 디스플레이가 가능하도록 한다. 또한 본 기술을 다수의 프로젝션 디스플레이로 확장하여 넘은 FOV(Field Of view)를 제공하는 방법을 제안한다.

• Proceedings of the Korean Society of Toxicology Conference
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• 2003.10b
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• pp.186-186
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• 2003

The aim of the study was to see if there is any differences in urinary 1-hydroxypyrene glucuronide (1-OHPG) levels in children (9-15 years old) living three cities in South Korea (Seoul, Incheon and Pohang) and three in China (Changchun, Datong and Kunming), where the levels of particulate air pollution varies.(omitted)

• Journal of Haehwa Medicine
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• v.16 no.1
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• pp.41-59
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• 2007

From the study of prescription on low back pain, the following conclusions are obtained. 1. Among classified cause of low back pain, ShinHur(腎虛) lowback pain and its prescription was most mentioned. 2. Prescriptions such as ChungAWhan(靑娥丸), KookBangAnShinWhan(局方安腎丸) BoSooDan(補髓丹) BaekBaeWhan(百倍丸) DooChungWhan(杜沖丸) JangBonDan(壯本丹) NokKakWhan(鹿角丸) were used in ShinHur(腎虛) type low back pain. 3. Prescription such as TaekRanTang(澤蘭湯) JiRyongSan(地龍散) YoeShinSan(如神散) ShinKookJoo(神麴酒) SoeGuenSan(舒筋散) were used in JwaSumJilBak(閃挫跌撲) type low back pain. 4. Prescription such as ChangChulTang(蒼朮湯) JumTongTang(拈痛湯) ChulBuTang(朮附湯) YiChoChangBaekSan(二炒蒼栢散) were used in SeupYoel(濕熱) type low back pain. 5. Prescription such as ChunGoongYookGaeTang(川芎肉桂湯) GaMiSaMulTang(加味四物湯) PaHoelSanDongTang(破血散疼湯) JiRyongSan(地龍散) were used in UhHoel(瘀血) type low back pain. 6. Prescription such as (蒼術復煎散) (五積散) (摩腰丹) (滲濕湯) were used in HanSeup(寒濕) type low back pain. 7. Prescription such as GaMiYiJinTang(加味二陳湯) GongYeonDan(控涎丹) SaMoolTangHapYiJinTangGaMi(四物湯合二陳湯加味) were used in DamUem(痰飮) type low back pain. 8. Prescription such as OhJukSanGaMi(五積散加味) OhYakSoonGiSanGaMi(烏藥順氣散加味) GaMiYongHoSan(加味龍虎散) SoSokMyoungTang(小續命湯) were used in Poong(風) type low back pain. 9. Prescription such as (四物湯合二陳湯) (仰腰湯) were used in SikJuk(食積) type low back pain and (五積散) (煨腎散) (三花神祐丸) in Seup(濕) type low back pain. 10. Prescription such as ChilKiTang(七氣湯) ChimHyangGangKiTang(沈香降氣湯) ChoKiSan(調氣散) InSamSoonKiSan(人參順氣散) were used in Ki(氣) type low back pain.