• Proceedings of the IEEK Conference
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• 2003.07d
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• pp.1601-1604
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• 2003

본 논문에서는 PDA. Hand PC(HPC)등과 같은 모바일 단말에 운영체제로써 Embedded Linux를 채택하였을 경우 고려해야 할 Hardware 사양, I/O interrupt latency에 따른 성능. 스케줄링 정책에 따른 성능에 대하여 논한다. 대상 타겟으로 사용한 HPC 의 하드웨어 사양에 설명하고, Embedded Linux와의 연동에 있어서 문제점을 살펴본다. 또한 각종 I/O device들의 Interrupt latency에 따른 성능저하와 스케줄링 정책에 의한 성능저하에 대하여 분석하고. 해결 방안에 대하여 논한다. 마지막으로 실제 예로서 Mobile IPv6 S/W Stack을 이용한 실제 검증을 수행하고 성능 향상 방안을 제시한다.

• 제어로봇시스템학회:학술대회논문집
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• 1996.10b
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• pp.1376-1379
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• 1996

In this paper a GPS receiver is developed using commercial chipsets. GP2010 RF front end and GP2021 Multi-channel correlator of GEC PLESSY are adapted in designing the receiver hardware. MC 68340 is used for controlling the correlator GP2021 and implementing the navigation processing. Also presented are some test results of the developed receiver whose software has an interrupt driven structure rather than common real-time kernel based structure.

• Proceedings of the Korean Information Science Society Conference
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• 2004.04a
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• pp.160-162
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• 2004

실시간 운영 체제(Real-Time Operating Systems)는 시스템 동작이 논리적 정확성뿐만 아니라 시간적 정확성에도 좌우되는 운영 체제이다. 시간 결정성(Time Determinism)을 지키기 위해서는 시스템에서 발생하는 모든 사건에 대해서 예측이 가능해야 한다. 시스템에서 발생하는 사건은 인터럽트에 의해 처리되는데, 이것은 비동기적인 사건의 발생을 CPU에게 알리는 하드웨어 메커니즘으로서 인터럽트 서비스 루틴(Interrupt Service Routine ： ISR)을 통해서 인터럽트에서 처리해야 할 부분을 수행한다. 본 논문에서는 인터럽트의 처리를 인터럽트의 인지와 처리로 분리할 수 있도록 LISR과 HISR을 설계로 구현하였다.

• The Transactions of the Korean Institute of Electrical Engineers
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• v.41 no.7
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• pp.694-700
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• 1992

The digital computer control systems which are used in time sharing control or remote control may experience intermittent interruptions. Further it can be made unstable by the intermittent interruptions of a control computer. This paper presents a mathematical model with intermittent computer interruptions and an unstable output response through simulation. Also it presents to improve the control quality using extrapolation method in interrupt synchronizing feedback path.

• Journal of agricultural medicine and community health
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• v.33 no.3
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• pp.269-278
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• 2008

= ABSTRACT = Objectives: This study was carried out to identify the relationships of family burden and mental health service needs of chronic mental patients in community. Methods: Objects of the study were 153 chronic mental patients in community of P. city in korea. Data were collected from December, 2007 to February, 2008 using structured questionnaire. Research tools of this study were family burden tool developed by Pai & Kapur (1981) and mental health service needs tool developed by Kim (2003). Results: The average grades for family burden was 1.62 points. And the biggest part of family burden was economic burden(1.74), followed by interrupt of daily life(1.67), interrupt of family relationship(1.64), interrupt of family leisure (1.57), effects of mental health(1.50), and effects of physical health(1.43). The average grades for mental health service needs was 2.72 points. And the biggest part of mental health service needs was rehabilitation service(3.09), followed by social service(2.87), and Psychiatric medical service(2.21). Positive correlation showed between all parts of family burden. And, positive correlation showed between psychiatric medical service and interrupt of daily life(r=.281, p<.01), psychiatric medical service and effects of physical health(r=.355,p<.01), social service and effects of mental health(r=.213,p<.01). Conclusion: The family burden for care giver of mental patients was related with all parts of family burden and mental health service needs of family. Thus, these results should be considered to reduce family burden for care giver of mental patients in community.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.6 no.8
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• pp.1251-1258
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• 2002

The weather FAX machine is the one of necessary of safety navigation for ship. which is the machine which make the weather image by the receiving radio signal which is modulated using FSK method and transmitted on air by coast station. after Coast station scan the weather image and broadcast the image with black dot to 1500Hz and white dot to 2300Hz using FSK modulation. This paper implement weather fax machine using only general IBM-PC by software. By using IBM-PC we can make some good functions like print, edit, save etc. The modulated signal from SSB go into RS232C port via photo coupler not to give damage to PC. by using Timer Interrupt and RS232C serial interrupt, we can measure signal frequency and remake weather image. This paper use only IBM-PC with general SSB receiver which is widely spread on the ship. so this is very economic and possible to implement mutifunctions.

• Membrane Journal
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• v.22 no.3
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• pp.208-215
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• 2012

Gel polymer electrolyte membranes were prepared from blends of polyvinyl alcohol (PVA) and poly (acrylic acid) (PAA), by solution-cast technique. The PAA content in the blend varied from 30 to 80 wt%. With the gel polymer electrolyte membranes, Zn air batteries were fabricated. The gel polymer electrolyte membranes were characterized by means of stress-strain test, impedance test. The Zn air batteries were tested by current interrupt method and galvanostatic discharge method. The tensile strength and tensile modulus decreased with increasing PAA content in the gel polymer electrolyte membrane. On the other hand, the ionic conductivity increased with increasing PAA content. The effect of ionic conductivity trend of the gel polymer electrolyte membrane in the Zn air battery was confirmed through current interrupt method and galvanostatic discharge method experiments. The battery with higher PAA content gel polymer electrolyte membrane showed lower IR drop and higher discharge capacity.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.38B no.10
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• pp.785-800
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• 2013

In MANET, AODV(Ad hoc On-demand Distance Vector) has its advantages as on-demand approach but it also has a disadvantage that the control packet overhead is high compared to other routing protocols. This paper improves the problem caused by Hello messages that are broadcasted periodically to detect the local connectivity and maintain neighbor list. Periodic hello messages reduce the Packet delivery ratio and the efficiency in the limited bandwidth. And its increased Control packet overhead leads to decrease the Residual battery capacity and the Network lifetime. Further, non-reactive nature of periodic hello messages in AODV has also been the source of numerous controversies. In order to solve these problems, this paper improves the performance by using the interrupt driven approach which removes periodic hello messages and decreases the Control packet overhead. Performance comparisons between the traditional AODV and proposed mod_AODV done with network simulator QualNet 5.0 show that the mod_AODV performs better in most performance metrics under scenarios with various values of simulation parameters.

• Journal of the Korean Institute of Telematics and Electronics C
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• v.36C no.7
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• pp.17-26
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• 1999

In this paper, Bit selectable and Bi-directional Interface Device is described, which can communicate data with the peripheral devices. Specially, an algorithm of truth-table comparison that synthesizes the pulse-type sequential circuit pulse has been proposed to design the Interrupt Generator, and implemented in designing the Interrupt Register. Also, a description of the asynchronous design method is given to remove the clock skew phenomenon, and the output asynchronous control method which finds the optimal clock and controls all the enable signal of the output pins at the same time is presented. Using this technique interface ports have delay time of less-than 0.7ns.

• 한국HCI학회:학술대회논문집
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• 2008.02a
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• pp.304-308
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• 2008

In this paper, we present measurement method of the amount of used piped water and the communications environment for automatic piped water meter reading. The existing piped water meter reading which is carried out by the human in person by monitoring the amount of use and recording make the problem of an error of the figure and being short of staffed to carry out piped water meter reading. To solve the existing problem in this paper, the amount of used piped water is converted into data type by Photo Interrupt Sensor, and IEEE 802.15.4 Protocol is used to confirm the measurement in remote place.