• Title, Summary, Keyword: instrumentation

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EVALUATION OF ROOT CANAL TRANSPORTATION AND REMAINING DENTIN/CEMENTUM THICKNESS FOLLOWING HAND AND ULTRASONIC INSTRUMENTATION (근관형성 방법에 따른 근관변위와 잔존치질의 두께에 관한 연구)

  • Seo, Byoung-Kon;Cho, Young-Gon
    • Restorative Dentistry and Endodontics
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    • v.17 no.2
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    • pp.399-412
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    • 1992
  • The purpose of this study was to evaluate the root canal transportation and remaining dentin / cementum thickness after using hand and ultrasonic instrumentation in the curved mesial root canals of extracted human mandibular molars. Fourty - six clear polyether blocks were made and randomly divided into two groups: hand instrumentation group with K - Flex files and ultrasonic instrumentation group with Suprasson SP unit. All root canals were instrumented to a size corresponding to a # 30 K - Flex file 1mm short from the radiographic apex. The roots were then sectioned perpendicular to the long axis so the apical and middle third could be evaluated with the Zoom stereomicroscope. The results were as follows : 1. In the total amount of removed dentin at middle third level, there was not significant difference between the hand instrumentation and ultrasonic instrumentation (P>0.05). 2. In the total amount of removed dentin at apical third level, there was more removed by the ultrasonic instrumentation than hand instrumentation(P<0.005). 3. In the transportation width, there was not significant difference between the two groups at both sectioned levels(P>0.05). 4. It was suggested that the canal was transported distally at middle third level and mesially at apical third level by booth techniques.

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Development of the External Instrumentation System of a Fighter Aircraft for Flight Test (비행시험을 위한 전투기 외장형 계측시스템 개발)

  • Yeom, Hyeong-Seop;Oh, Jong-Hoon;Sung, Duck-Yong
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.38 no.9
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    • pp.907-913
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    • 2010
  • In this paper, we have described a development of the external instrumentation system of a fighter aircraft for flight test. The external instrumentation system consists of the instrumentation pod and the image pod. The instrumentation pod measures a flight data(attitude, velocity, altitude, etc) of the fighter aircraft by using GPS/AHRS sensor. The image pod takes high-speed images for the separation trajectory of a smart bomb with 2 high-speed cameras and video signal for it with one general camera. We have verified the performance of the external instrumentation system through the ground test, the environment test and the flight test.

Instrumentation Performance Measurement Technique for Evaluating Efficiency of Binary Analysis Tools (바이너리 분석도구 효율성 평가를 위한 Instrumentation 성능 측정기법)

  • Lee, Minsu;Lee, Jehyun;Kim, Hobin;Ryu, Chanho
    • Journal of the Korea Institute of Information Security & Cryptology
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    • v.27 no.6
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    • pp.1331-1345
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    • 2017
  • Binary instrumentation has been developed for monitoring and debugging executables without their source codes. Previous efforts on the binary instrumentation are mainly focused on its capability and accuracy, but not on efficiency for practical application. In particular, criteria and measurement methodologies for evaluating and comparing the efficiency of binary investigation tools and algorithms do not estimated yet. In this paper, we propose the instrumentation primitives which are a unit functionality and measurement methodology. Through the empirical experiments by adopting the proposed methodology on DynamoRIO and Pin, we show the feasibility of the proposal.

Change of working length in curved canals by various instrumentation techniques (만곡근관에서 근관형성법에 따른 근관작업장의 변화)

  • Jo, Jeong-Im;Jin, Myoung-Uk;Kim, Young-Kyung;Kim, Sung-Kyo
    • Restorative Dentistry and Endodontics
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    • v.31 no.1
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    • pp.30-35
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    • 2006
  • To evaluate the change of working length with various instrumentation techniques in curved canals, working length and canal curvature were determined before and after canal instrumentation in buccal or mesial canals of extracted human molars. Stainless steel K-files ($MANI^{(R)}$, Matsutani Seisakusho Co. Takanezawa, Japan), nickel-titanium K-files (Naviflex $NT^{TM}$, Brassier, Savannah, USA) , $ProFile^{(R)}$, and ProTaper (Dentsply-Maillefer, Ballaigues, Switzerland) were used to prepare the canals with crown-down technique. In two hand instrumentation groups coronal flaring was made with Gates Glidden burs. Apical canals were instrumented until apical diameter had attained a size of 30. Positional relation between the tooth apex and the $\#10$ K-file tip was examined by using AutoCAD 2000 (Autodesk Corp., San Rafael. CA, USA) under a stereomicroscope before and after coronal flaring, and after apical instrumentation. Degree of canal curvature was also measured with Schneider's method in radiographs. Data of working length and canal curvature changes were statistically analyzed with one-way ANOVA and Tukey's studentized range test. Working length and canal curvature were decreased significantly in each step in all instrumentation groups. Coronal flaring using Cates Glidden burs in hand instrument groups and whole canal instrumentation using stainless steel hand K-files caused significantly more working length change than in ProFile instrumentation group (p<0.05). The result of this study demonstrates that all of the above kinds of instrumentation in curved canals cause reduction of working length and canal curvature at each instrumentation steps, and hand instrumentation causes more working length change than ProFile.

Development of a Digital System for Protection and Control of a Substation Part 1 - Development of hardware (변전소의 보호.제어를 위한 디지탈 시스템 개발 PART 1 - 하드웨어 개발)

  • Kwon, W.H.;Lee, Y.I.;Park, H.K.;Park, S.H.;Kim, M.J.;Moon, Y.S.;Yoon, M.C.;Kim, I.D.;Lee, J.H.
    • Proceedings of the KIEE Conference
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    • pp.359-361
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    • 1992
  • This paper describes the development of an Integrated Digital Protection And Control System (IDPACS) for 345 KV substation. The developed IDPACS system containes digital protection units for transmission lines, delivery lines, transformers, bus, shunt reactors and Shunt capacitors. We deloped a Local Area Network (LAN) Which connects the digital protection units to the station computer for monitoring and control purposes.

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I/O Scaling Factors Design for Fuzzy Controller (퍼지제어기을 위한 입출력이득요소 설계)

  • Jung, C.G.;Lee, G.Y.;Jeong, H.;Kim, Y.D.;Go, N.Y.;Choi, H.S.
    • Proceedings of the KIEE Conference
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    • pp.990-992
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    • 1996
  • The design of I/O scaling factors for fuzzy controller system is proposed in this paper. The proposed method is for nonlinear input scaling factor and variable output scaling factor. The fuzzy controller is evaluated by computer simulation on the 1st order process and 2nd order process. Simulation results showed robust characteristics for variable reference signal.

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On Design of the Decentralised Controller for a System with a Linear Symmetric Structure (선형 대칭 구성 시스템에 대한 분산 제어기 설계)

  • Lee, Se-In;Lee, Sang-Chuel;Cho, Do-Hyeon;Lee, Jong-Yong;Park, Jong-Woo;Lee, Sang-Hyo
    • Proceedings of the KIEE Conference
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    • pp.636-638
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    • 1999
  • 본 논문에서는 선형 대규모 시스템(large-scale systems)에 대하여 강건한 분산 제어기를 설계한다. 동일한 부시템(identical subsystems)들이 서로 대칭적으로 연결되어 있는 제어기 설계 시 불확실성은 부시스템 행렬과 연결 시스템 행렬의 유계된 매개 변수 변동을 모두 고려한다. 본 논문의 설계 절차는 대칭 연결 구조를 불확실성으로 포함시킨 하나의 인공적인 보조 시스템(artificial auxiliary systems)으로 번환 함으로써 대규모 시스템에 대한 분산 제어기 설계의 복잡성을 줄일 수 있음을 보이고 수치 예를 통해 이를 확인한다.

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Design of A Robust two-degree-of-freedom Controller for An Inverted Pendulum System (도립진자 시스템에 적용한 강건한 2-자유도 제어기 설계)

  • Ahn, Soo-Joong;Lee, Sang-Chuel;Cho, Do-Hyeoun;Lee, Jong-Yong;Park, Jong-Woo;Lee, Sang-Hyo
    • Proceedings of the KIEE Conference
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    • pp.847-849
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    • 1999
  • 본 논문에서는 도립 진자 시스템에 대하여 모델의 불확실성에도 불구하고 수레의 위치가 기준 입력을 추종하는 강건한 2-자유도(two degree of freedom) 제어기를 설계한다. 도립 진자 시스템의 모델 불확실성은 기약 분해 불확실성으로 고려하고, 기준 입력 추종 성능은 도립 진자 시스템의 수레 위치가 원하는 기준 위치로 추종하는 문제를 고려한다. 이러한 강건 안정화와 기준입력 추종사이의 절충 문제를 해결하기 위해서 2-자유도 제어기를 설계한다. 2-자유도 제어기는 프리필터와 피드백 제어기로 구성된다. 설계 절차에 따라 얻어진 제어기는 모의 실험을 통해 그 성능을 확인한다.

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Control of the flexible system under irregular disturbance by using of 『random gain』

  • Cho, Yun-Hyun;Yang, Jae-Hyuk;Kim, Dae-Jung;Park, Sang-Tae;Chung, Jae-Wook;Hoon Heo
    • 제어로봇시스템학회:학술대회논문집
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    • pp.435-439
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    • 1998
  • A control strategy for flexible structure under irregular disturbance by using of$\boxDr$random gain$\boxUl$is developed and implemented. System equation is transformed to stochastic domain by F-P-K approach from physical domain. A controller is designed in the stochastic domain, accordingly system is controlled by$\boxDr$random gain$\boxUl$in time domain. In the paper, a new control technique is successfully employed for flexible system under white noise, and the result is verified by Monte-Carlo simulation and compared with the performance via LQR controller.

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A Study of Data Slaving Software Module for Instrumentation Systems on Multi-Target Environment (다중표적 환경에서 추적시스템을 위한 연동 소프트웨어 모듈 연구)

  • Oh, Se-Jin
    • Journal of the Korea Institute of Military Science and Technology
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    • v.14 no.4
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    • pp.622-629
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    • 2011
  • In this paper, you can see the structure of data slaving software module that is in use on flight test and result of the test with the slaving. The data slaving software module has many functions, data slaving for various instrumentation systems(instrumentation radars, telemetry systems for missile, aircraft and so on), setting some slaving group for multi-target, communicating with the instrumentation systems in a far away site and sending a specific value as slaving data. This fits the requests for flight test that is being performed and improves performance of the instrumentation systems.