• Title/Summary/Keyword: Additional functions

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A Study on the Sensor Integrated of Drain Valve for Degradation Detecting of Engine Oil (엔진 오일으 감지를 우한 드레인 밸브 일체형 센서)

  • Kim, Jaehwa;Park, Sekwang
    • Journal of Sensor Science and Technology
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    • v.21 no.6
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    • pp.434-439
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    • 2012
  • In this study, the oil degradation measuring for integrated sensor of drain valve was fabricated. A sensor used in the experiments was integrated with drain valves and installed in oil pan without requiring additional space. As a result of the experiments, the capacitances changed with two inflection points in accordance with an after in mileage. The first inflection point indicated the exhaustion of oil additives, and after the second inflection point, the oil degradation was completed, which increased the viscosity and disabled the functions of oil. Thus, this section was determined as the time of oil exchange.

Sequencing Strategy for Autonomous Mobile Robots in Real Environments (이동로봇 자율주행을 위한 행위모듈의 실행순서 조정기법)

  • 송인섭;박정민;오상록;조영조;박귀태
    • Journal of Institute of Control, Robotics and Systems
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    • v.5 no.3
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    • pp.297-305
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    • 1999
  • Autonomous mobile robots are required to achieve multiple goals while responding quickly to the dynamic environments. An appropriate robot control architecture, which clearly and systematically defines the relationship among the inputs, the processing functions and the outputs, thus needs to be embedded in the robot controller. This paper proposes a kind of hybrid control architecture which combines the key features of the two well-known robot control architectures; hierarchical and behavioral- based. The overall control architecture consists of three layers, i.e. the highest planner, the middle plan executor, and the lowest monitor and behavior-based controller. In the planned situation, only one behavior module is chosen by the logical coordinator in the plan executor according to the way point bin. In the exceptional situation, the central controller in the plan executor issues an additional control command to reach the planned way point. Several simulations and experiments with autonomous mobile robot show that the proposed architecture enables the robot controller to achieve the multiple sequential goals even in dynamic and uncertain environments.

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Implementation of fast forward function in video on demand service system (주문형 비디오 서비스 시스템에서의 정방향 및 역방향 빠른재생 기능구현)

  • 권은정;최영진;김형명
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.22 no.6
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    • pp.1377-1384
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    • 1997
  • We propose a new scheme to provide the fast forward and reverse(FF/R) functions to users in Video On Demand Service System. The proposed scheme is to use only I and P pictures obtained by sampling MPEG2 bit-steam. New frame raes for FF/R play are specified with parameters of MPEG2 syntrx. Bits of I and P pictures are reduced in three steps: Variable length decoding(VLD), Inverse quantization and Requantization. The proposed scheme is ecnomical in the sense that it can provide FF/R function without any additional requirement on the bandwidth and on the storage media in video server.

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Development of efficient Web-based Light Facility Control and Management System (효율적인 Web기반 조명시설 제어 및 관리 시스템의 개발)

  • Chang, Byong-Kun;Jeon, Chang-Dae
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • 2004.11a
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    • pp.347-350
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    • 2004
  • In this paper, PDA(Personal Digital Assistants) terminal is proposed to be used for controlling and managing light facilities efficiently by connecting it to a web-based server system and adding additional functions. The control box of current light facilities may be implemented based on a simple On-Off function. The operational quality of the light facilities will be efficiently improved with some practical advantages such as reduction of required facility, manpower and time in managing the lights and control boxes tv using the popular PDA.

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Study on the Specificity Alteration of Mammalian UV Endonuclease III

  • Lee, Jae-Yung;Kim, Joon
    • BMB Reports
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    • v.30 no.1
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    • pp.66-72
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    • 1997
  • A mammalian DNA repair enzyme, UV endonuclease III which also functions as a ribosomal protein S3 (rpS3), was purified from mouse cells and characterized. UV endonuclease III was previously cloned and known to yield a peptide of 32 kDa upon expression in E. coli [Kim et al., (1995) J. Bioi. Chem. 270, 13620-13629]. However, biochemically purified UV endonuclease III, which has a sedimentation coefficient of 3.25, appears to have an additional peptide of 28 kDa. It appears that two bands were derived from one complex, judging from the comparison of the nuclease activity on the native and SDS-gel electrophoreses. UV endonuclease III becomes non-specific upon purification and this phenomenon is more significant in the case of pure fractions of the enzyme. Non-specific activity was not influenced by pH or any salt conditions.

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Capicua is involved in Dorsal-mediated repression of zerknüllt expression in Drosophila embryo

  • Shin, Dong-Hyeon;Hong, Joung-Woo
    • BMB Reports
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    • v.47 no.9
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    • pp.518-523
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    • 2014
  • The maternal transcription factor Dorsal (Dl) functions as both an activator and a repressor in a context-dependent manner to control dorsal-ventral patterning in the Drosophila embryo. Previous studies have suggested that Dl is an intrinsic activator and its repressive activity requires additional corepressors that bind corepressor-binding sites near Dl-binding sites. However, the molecular identities of the corepressors have yet to be identified. Here, we present evidence that Capicua (Cic) is involved in Dl-mediated repression in the zerkn$\ddot{u}$llt (zen) ventral repression element (VRE). Computational and genetic analyses indicate that a DNA-binding consensus sequence of Cic is highly analogous with previously identified corepressor-binding sequences and that Dl failed to repress zen expression in lateral regions of cic mutant embryos. Furthermore, electrophoretic mobility shift assay (EMSA) shows that Cic directly interacts with several corepressor-binding sites in the zen VRE. These results suggest that Cic may function as a corepressor by binding the VRE.

A ship control by fuzzy neutral network (FNN에 의한 선박의 제어)

  • Kang, Chang-Nam
    • Proceedings of the KIEE Conference
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    • 2009.07a
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    • pp.1703_1704
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    • 2009
  • Fuzzy neural ship controllers is used in ship steering control. It can make full use of the advantage of all kinds of intelligent algorithms. This provides an efficient way for this paper. An RBF neural network and GA optimization are employed in a fuzzy neural controller to deal with the nonlinearity, time varying and uncertain factors. Utilizing the designed network to substitute the conventional fuzzy inference, the rule base and membership functions can be auto-adjusted by GA optimization. The parameters of neural network can be decreased by using union-rule configuration in the hidden layer of the network. The ship control quality is effectively improved in case of appending additional sea state disturbance. The performance of controller is evaluated by the system simulation using simulink tools.

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Task Characteristics and Utilization of Electronic Approval System : Media Richness Theory Perspective (업무특성과 전자결재시스템 활용간의 관계에 대한 탐색적 연구:매체 풍부성 이론 관점)

  • 김영걸;오승엽
    • Korean Management Science Review
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    • v.17 no.1
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    • pp.31-40
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    • 2000
  • With the rapidly changing external environment and the increasing internal process complexity more and more organizations are adopting the Electronic Approval System(EAS) for their competitiveness. This paper defines EAS as a core organizational communication medium investigates factors which influence EAS's use from a media rich-ness theory and shows sutiable EAS functions for equivocality resolution and uncertainty reduction. Results from the five EAS implementation sites show that most organizations use EAS only for tasks with low equivocality and low uncertainty. Additional functionalities such as video conferencing and database access were suggested for fu-ture EAS system to enhance their utilization for more cirtical and unstructed tasks.

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Hydrodynamics of submersible aquaculture cage system using numerical model

  • Kim, Tae-Ho;Fredriksson, David W.;Decew, Judson
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.44 no.1
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    • pp.46-56
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    • 2008
  • A numerical model analysis was performed to analyze the motion and mooring tension response of submersible fish cage systems in irregular waves and currents. Two systems were examined: a submersible cage mooring with a single, high tension mooring and the same system, but with an additional three point mooring. Using a Morison equation type model, simulations of the systems were conducted with the cage at the surface and submerged. Irregular waves(JONSWAP spectrum) with and without a co-linear current with a magnitude of 0.5m/s were simulated into the model as input parameters. Surge, heave and pitch dynamic calculations were made, along with tension responses in the mooring lines. Results were analyzed in both the time and frequency domains and linear transfer functions were calculated.

Identification of 18 flutter derivatives by covariance driven stochastic subspace method

  • Mishra, Shambhu Sharan;Kumar, Krishen;Krishna, Prem
    • Wind and Structures
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    • v.9 no.2
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    • pp.159-178
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    • 2006
  • For the slender and flexible cable supported bridges, identification of all the flutter derivatives for the vertical, lateral and torsional motions is essential for its stability investigation. In all, eighteen flutter derivatives may have to be considered, the identification of which using a three degree-of-freedom elastic suspension system has been a challenging task. In this paper, a system identification technique, known as covariance-driven stochastic subspace identification (COV-SSI) technique, has been utilized to extract the flutter derivatives for a typical bridge deck. This method identifies the stochastic state-space model from the covariances of the output-only (stochastic) data. All the eighteen flutter derivatives have been simultaneously extracted from the output response data obtained from wind tunnel test on a 3-DOF elastically suspended bridge deck section-model. Simplicity in model suspension and measurements of only output responses are additional motivating factors for adopting COV-SSI technique. The identified discrete values of flutter derivatives have been approximated by rational functions.