• Title, Summary, Keyword: intelligent I/O

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A Study for High Performance of Intelligent I/O Architecture of RAID System (지능형 I/O구조를 갖는 RAID 시스템의 성능 향상을 위한 연구)

  • Choi, Gwi-Yeol;Park, Kye-Won
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.10 no.11
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    • pp.1989-1995
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    • 2006
  • RAID(Redundant mays of inexpensive disks) were proposed as a way to use parallelism between multiple disks to improve aggregate I/O performance. The emerging of intelligent I/O architecture provides a standard for high performance I/O subsystems and introducer intelligence at the hardware level. With an embedded processor, intelligent I/O adaptors can offload the major I/O processing workload from the CPU and, at the same time, increase the I/O performance. This parer addresses the essential issue in the design of disk scheduling for intelligent I/O devices. In this paper we compare with MB throughput per second and maximum I/O respond time in RAID.

GripLaunch: a Novel Sensor-Based Mobile User Interface with Touch Sensing Housing

  • Chang, Wook;Park, Joon-Ah;Lee, Hyun-Jeong;Cho, Joon-Kee;Soh, Byung-Seok;Shim, Jung-Hyun;Yang, Gyung-Hye;Cho, Sung-Jung
    • International Journal of Fuzzy Logic and Intelligent Systems
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    • v.6 no.4
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    • pp.304-313
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    • 2006
  • This paper describes a novel way of applying capacitive sensing technology to a mobile user interface. The key idea is to use grip-pattern, which is naturally produced when a user tries to use the mobile device, as a clue to determine an application to be launched. To this end, a capacitive touch sensing system is carefully designed and installed underneath the housing of the mobile device to capture the information of the user's grip-pattern. The captured data is then recognized by dedicated recognition algorithms. The feasibility of the proposed user interface system is thoroughly evaluated with various recognition tests.

Intelligent I/O Subsystem for Future A/V Embedded Device (멀티미디어 기기를 위한 지능형 입출력 서브시스템)

  • Jang, Hyung-Kyu;Won, Yoo-Jip;Ryu, Jae-Min;Shim, Jun-Seok;Boldyrev, Serguei
    • Journal of KIISE:Computer Systems and Theory
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    • v.33 no.1_2
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    • pp.79-91
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    • 2006
  • The intelligent disk can improve the overall performance of the I/O subsystem by processing the I/O operations in the disk side. At present time, however, realizing the intelligent disk seems to be impossible because of the limitation of the I/O subsystem and the lack of the backward compatibility with the traditional I/O interface scheme. In this paper, we proposed new model for the intelligent disk that dynamically optimizes the I/O subsystem using the information that is only related to the physical sector. In this way, the proposed model does not break the compatibility with the traditional I/O interface scheme. For these works, the boosting algorithm that upgrades a weak learner by repeating teaming is used. If the last learner classifies a recent I/O workload as the multimedia workload, the disk reads more sectors. Also, by embedding this functionality as a firmware or a embedded OS within the disk, the overall I/O subsystem can be operated more efficiently without the additional workload.

FCXO ; A Fuzzy Compensated Crystal Oscillator

  • de los Mozos, Mario Reyesr;Valderrama, Elena;Arguelles, Javier
    • Proceedings of the Korean Institute of Intelligent Systems Conference
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    • pp.842-844
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    • 1993
  • We present a F.L.C. (Fuzzy Logic Controller) to control of the oscillation frequency of a V.C.X.O. (Voltage Controled Crystal Oscillator). This F.C.X.O. maintains stable its oscillation frequency inside a range of 1 ppm (one part per millon), with temperature between -55$^{\circ}C$ to+75$^{\circ}C$.

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Performance Evaluation of iSER on Storage system using Infiniband fabric (인피니밴드기반 저장장치에서의 iSER(iSCSI Extension for RDMA) 성능평가)

  • Kim, Young Hwan;Son, Jae-Gi;Jung, Hye-Dong
    • Proceedings of the Korea Information Processing Society Conference
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    • pp.148-150
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    • 2013
  • 최근 TCP/IP에서 세션을 통하여 노드들 간의 통신을 연결하는 방식에서 현재는 하나의 채널을 통해 고속의 I/O가 가능하도록 하는 인피니밴드 같은 기술이 많이 연구되고 있다. 인피니밴드는 프로세싱 노드와 입출력 장치 사이의 통신, 프로세스간 통신에 대한 산업 표준이 되고 있고 프로세싱 노드와 입출력 장치를 연결하기 위해 스위치 기반의 상호 연결은 전통적인 버스 입출력을 대체하는 새로운 입출력 방식이다. 또한 인피니밴드에서는 현재 이슈가 되고 있는 RDMA 방식을 이용해 원격지 서버들간에 직접 메모리 접근 방식을 통해 CPU와 OS의 로드를 최소화하고 있다. 본 논문에서는 인피니밴드 네트워크를 이용하는 저장장치 접근 프로토콜인 iSER(iSCSI Extension RDMA Protocol)와 기존 이더넷망에서 사용되는 iSCSI(Internet SCSI) 프로토콜을 이용하여 서버와 저장장치 간의 IOPS 와 초당 데이터 전송량에 대한 성능을 평가한다. 우리는 성능평가를 위해 Intel에서 제공하는 저장장치 I/O 성능평가 도구인 IO meter를 이용했다.

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Optimization of Fuzzy Relational Models

  • Pedrycz, W.;de Oliveira, J. Valente
    • Proceedings of the Korean Institute of Intelligent Systems Conference
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    • pp.1187-1190
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    • 1993
  • The problem of the optimization of fuzzy relational models for dealing with (non-fuzzy) numerical data is investigated. In this context, interfaces optimization assumes particular importance, becoming a determinant factor in what concerns the overall model performance. Considering this, several scenarios for building fuzzy relational models are presented. These are: (i) optimizing I/O interfaces in advance (independently from the linguistic part of the model); (ii) optimizing I/O interfaces in advance and allowing that their optimized parameters may change during the learning of the linguistic part of the model; (iii) build simultaneously both interfaces and the linguistic subsystem; and (iv) build simultaneously both linguistic subsystem and interfaces, now subject to semantic integrity constraints. As linguistic subsystems, both a basic type and an extended versions of fuzzy relation equations are exploited in each one of these scenarios. A comparative analysis of the differ nt approaches is summarized.

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Electrical Behaviors of ZnO Elements under Combined Direct and Alternating Voltages

  • Yang, Soon-Man;Lee, Bok-Hee;Paek, Seung-Kwon
    • Journal of Electrical Engineering and Technology
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    • v.4 no.1
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    • pp.111-117
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    • 2009
  • This paper presents the characteristics of leakage currents flowing through zinc oxide (ZnO) surge arrester elements under the combined direct-current (DC) and 60 Hz alternating-current (AC) voltages. The current-voltage characteristic curves (I-V curves) of the commercial ZnO surge arrester elements were obtained as a function of the voltage ratio a. At constant peak value of the combined DC and AC voltage, the resistive leakage current of the ZnO blocks was significantly increased as the voltage ratio $\alpha$ increased. The I-V curves under the combined DC and AC voltages were placed between the pure DC and AC characteristics, and the cross-over phenomenon in both the I-V curves and R-V curves was observed at the low current region. The ZnO power dissipation for DC voltages was less than that for AC voltage in the pre-breakdown region and reversed at higher voltages.

The Design of a Control & Measurement System for the Driving of Wheel-in Motor (휠인 모터 구동을 위한 제어 및 계측 시스템 설계)

  • Choi, Jung-Keyng
    • Journal of Korean Institute of Intelligent Systems
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    • v.25 no.4
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    • pp.405-411
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    • 2015
  • This paper sugg ests speed measurement and control system desig n methods to drive the Wheel-in Motor that is transfer rotational force to the hub of the wheel and drives it directly. The dsPIC30F2010 16 bit microprocessor specified to motion controller is used as a intelligent controller. The minimum functions of dsPIC30F2010, system clock, PWM output, I/O, timer, communication, applicable to motor control are used and operating characteristics of hall signal measurement and control software functions are tested. Also the algorithm including PDFF speed control program was implemented using this software functions and show the experimental results..

Solution of the boundary value problem for the second order ordinary differential equations by a fuzzy system (2계 선형상미방 경계치문제의 퍼지시스템 해법)

  • 문병수;정종은;황인구;김정수
    • Proceedings of the Korean Institute of Intelligent Systems Conference
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    • pp.289-292
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    • 2002
  • 2계 선형 상미분방정식의 경계치 문제는 보통 해를 구하고자 하는 구간의 양 끝점에서 도함수의 값을 임의로 선정한 후 각 점에서 초기치 문제의 해를 구한 다음 적절한 1차 결합을 이용하여 구하게 된다. 이 경우 초기값과 도함수 값을 사용한 반복연산이 수반되며 따라서 오차의 누적이 불가피 하게 된다. 이 논문에서는 이같은 오차의 누적을 피할 뿐 아니라 3차 Spline 함수를 사용함으로써 오차가 O( $h^2$)인 해를 구하는 방법에 대하여 기술한다 두 개의 경계조건과 근사값을 구하고자 하는 점에서의 함수 값을 "If x is $B_{i}$, then f is $C_{i}$"와 같은 Fuzzy Rule들로 변형하고 주어진 미분방정식을 상수 $C_{i}$들의 관계식으로 변형하여 해를 구하였다. 산출된 결과로부터의 보간 연산은 Fuzzy System사용에 의하여 대체되었다. 이상의 방법으로 산출한 해의 근사오차가 O( $h^2$).임을 증명하였으며 3개의 예제에 대한 계산결과를 4계 Runge-Kutta 방법에 의한 해와 비교하여 기술하였다였다였다였다

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Study on the Plug/Play Type Open Architecture CNC Technology (Plug/Play 타입의 개방형 CNC 기술 연구)

  • 윤원수;김찬봉;이은애;김세광;오세봉
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • pp.28-32
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    • 1997
  • This study aims at developing the high speed/intelligent machining system suing the plug/play method of an open architecture controller. The plug/play technology by the Application Specific Function (ASF), can readily implement the open architecture controller into various machining system or other automatic equipments. For the open architecture controller, this study developed the open HMI, screen editor, ASF, visual builder, and controller OS technology as software components. On the other hand, we developed the I/O module and main board as control hardware system. This study, as an example, presents integration of individual component technologies for the plug/play type open architecture CNC system.

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