• Journal of the Korean Home Economics Association
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• v.38 no.7
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• pp.27-37
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• 2000

According to recent statistics, the number of family-owned small business have increased. And these growing numbers have created an urgent need for researchers and government to analyse and plan for this population. The purposes of this study were to identify the determining factors of the location of family owned small business and to analyze the factors related to their job satisfaction, and life satisfaction. The data used for this study, were 713 self-employed men and women which were elected from the panel data of 1998 MIPS of Daewoo Economic Research Institute. Statistics performed for the analysis were frequencies, percentiles, t-test, $\varkappa$$^2$, OLS and Logistic analysis. It was found that the person who work at home-base small office were the residents of smaller city, and are older than the office-going attendants. The variable which effects the job satisfaction of the home-based workers was the educational background. And sex was the only factor which affects the job satisfaction of the office-going attendants. It was also found that job satisfaction affects the life satisfaction significantly in both group.

• The Bulletin of The Korean Astronomical Society
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• v.40 no.2
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• pp.41.2-41.2
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• 2015

We have performed deep wide-field CCD photometry of the young open cluster IC 1805 in the famous star forming region W4, and obtained photometric data for more than 91,000 stars in the field of IC 1805 based on observations with the 3.6m CFHT and the AZT-22 1.5m telescope at Maidanak Astronomical Observatory in Uzbekistan. The photometric data cover an area $43^{\prime}{\times}45^{\prime}$ which is far larger and far deeper than any other optical observations made for the cluster. In order to select the young stellar objects with mid-IR excess emission, we have performed mid-IR photometry of the cluster using the archival images obtained with the Spitzer Space Telescope IRAC and MIPS instruments. From a preliminary analysis of the data, we determined the reddening law ($R_V=3.02{\pm}0.05$), distance modulus ($V_0-M_V=11.9{\pm}0.2$), and the spatial distribution of members.

• Proceedings of the Acoustical Society of Korea Conference
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• spring
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• pp.275-278
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• 2004

In TV sound system, loudspeakers are subject to severe size constraints. The small size of the transducer affects the low frequency signal performance of the system. Bass signal performance contributes significantly to the user perceived sound quality and a good bass signal reproduction is essential. Increasing the sound energy in the bass signal range is an unviable solution since the gain required are exceedingly high and signal distortion occurs because of the speaker overload. Recently methods are being proposed to invoke low frequency illusion using psychoacoustic phenomena of the missing fundamental. This paper proposes a simple and effective signal processing method to create bass signal illusion in TV speakers using the missing fundamental effect, at a complexity of 12 MIPS on Motorola 56371 audio DSP.

• Proceedings of the Korean Information Science Society Conference
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• 2008.06b
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• pp.451-455
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• 2008

PC 기술의 발전으로 사용자는 하나의 물리적인 컴퓨터에서 서로 다른 운영체제를 실행하는 작업이 가능하게 되고 서버에서는 하드웨어의 교체로 인한 특정(MIPS, PowerPC)하드웨어에서 서비스 되고 있는 프로그램을 다른 하드웨어에 이식하는 경우의 재개발 비용 없이 성능을 개선할 수 있게 되었다.Virtualization 기술은 PowerPC기반의 서버 프로그램을 X86기반의 개인용 컴퓨터에 이식하는 경우와 같이 다양한 하드웨어 프로그램 개발 환경을 제공해 준다. 본 논문에서는 일반 사용자가 Virtualization을 사용하여 USB 장치를 사용할 수 있게 하는 다양한 방법들을 논한다. 이를 구현하기 위해 리눅스 커널 2.6의 특징인 모듈화를 이용하며 USB 디바이스에 대한 가상화 모듈을 구현하여 VMM (Virtual Machine Monitor)이 USB를 지원하도록 한다. 따라서 GuestOS(가상화하여 실행중인OS)에서는 별도의 개발 없이 USB를 사용할 수 있다.

• Journal of the Semiconductor & Display Technology
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• v.2 no.3
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• pp.25-30
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• 2003

In this study, the controller using TMS320LF2407 low voltage DSP for motor control is designed and realized. It has 40 MIPS calculating ability and its driving voltage is 3.3 V for low power. The peripheral elements, however usually use 5 V and they need voltage transfer interface. In this study, voltage transformation and reducing noise are studied and space vector PWM is adopted as a motor control scheme. According to these methods, the efforts for software programming and calculation processes are reduced. In addition, the hardware is also simplified by substituting the current control part with software programming. Through this study, the DSP based servo controller increases its ability for high performance multi-function on semiconductor transportation equipments..

• Proceedings of the KIEE Conference
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• 1992.07a
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• pp.245-247
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• 1992

We utilize as a processor TMS320C25 (Texas Instrument) in making a driver for a 4 pole PM synchronous servo motor. TMS320C25 has a 32bit ALU and a 16 bit hardware multiplier, and the maximum instruction execution rate is 10MIPS at 40MHz. We adopted a space vector modulation PWM method. An interesting point of this work is that PWM wave is generated by utilizing timer interrupts. Hence, in the rest of time the processor can take care of the other routine such as Park's coordinate transformation and the computation required in the feedback loops. Thus, it mates the hardware circuit very simple. Due to the decrease in the number of components, the motor drive system becomes more fault-tolerant and cost-optimized. Also, more flexibility is gained in changing the control parameters.

• 제어로봇시스템학회:학술대회논문집
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• 1991.10a
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• pp.844-849
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• 1991

A high speed control system for a telerobot using DSP is developed. The system is designed to resolve computational burden in advanced algorithms. The design is assumed to h ave no specific algorithm and robot configuration. The system is composed of a teaching box, a DSP board, a set of servo drivers and 16 bit microcomputer system. The teaching box is designed as a man-machine interface, which has two joysticks with three degrees of freedom for velocity generation in Cartesian space. The DSP board, i.e. DSP56000ADS based on a 10.25MIPS digital signal processor, DSP56001, computes the inverse Jacobian matrix which transforms Cartesian velocity into joint velocity. A resolved motion rate control algorithm for a 5 degrees of freedom manipulator was implemented. About 100 Hz sampling rate was achieved in this system.

• Proceedings of the IEEK Conference
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• 2003.11a
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• pp.251-254
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• 2003

본 논문의 목표는 디지털방송과 인터넷의 융합에 따른 MPEG-2/4/7 방송 및 인터넷 콘텐츠을 비롯한 게임등과 같은 다양한 멀티미디어 서비스를 제공하기 위한 차세대 지능형 고품질 홈 엔터테인먼트 시스템 Platform 개발이다. 디지털 방송과 데이터방송 수신이 가능한 Set-Top Box기능, 수신된 방송의 저장 및 재생이 가능한 PDR 기능, MPEG-2 형식을 MPEG-4 형식으로 변환하는 Transcoding 기능, VOD 서비스를 제공하기 위한 Streaming 기능 등을 지원할 수 있는 시스템의 구조를 설계하였다. 이러한 지능형 고품질 서비스를 지원하기 일해 고성능 시스템이 필요하다. 시스템 제어를 위한 CPU 로는 PMC-Sierra사의 MIPS Architecture에 기반을 둔 RM5231 을 채택하고, MPEC-4 Decoding, BIFS Presentation Engine과 Streaming 서비스와 MPEC-7 Metadata Generator/Parser 을 위해 ARM Architecture에 기반을 둔 Intel80200 Processor 를 채택하였다. 또한, 디지털방송을 위한 MPEC-2 Decoder Chip 인 Teraloglc 사의 TL811 System Controller 와 TL851 Graphics& Display Processor 를 채택하였다. 개발된 시스템을 테스트하기 위하여 DVB-MHP Server와 MPEG-4 IP Streaming Server 를 구축하여 디지털 방송과 Streaming 서비스를 테스트하였다.

• Journal of the Korean Institute of Telematics and Electronics A
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• v.31A no.5
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• pp.158-169
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• 1994

It is very common in today 's design practice to simulate a big design with a large set of test vectors thereby generating a huge set of data (simulation results) to be analyzed. As the design grows, the simulation results grow and become harder to handled. In this paper, we present algorithms for the compression and regeneration of simulation results. The compression is performed by sampling nets in a circuit. If the user wants to examine the lost part of the data, it is quickly regenerated by applying incremental simulation technique. Experimental results obtained for several practical circuits show that the compression ratio of 10 is easily obtained while maintaining a reasonably fast regeneration of data on a 15.7 MIPS workstation. Using the proposed method we can effectively reduce debug cycle time.

• Proceedings of the Acoustical Society of Korea Conference
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• 1998.08a
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• pp.165-168
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• 1998

제안하고 있는 CSD17C00 chip은 C&S technology에서 개발한 것으로, 음성 신호 처리를 위해 범용으로 구현되었으며, 16 bit 40 MIPS DSP group OAK DSP Core를 포함, 이에 Miscellaneous Logic, Serial Port, Host Interface, Timer, Compander 의 5가지 Peripherals 과 범용 I/O Ports 로 설계되었다. 1차적으로 CSD17C00 Chip 의 성능을 점검하였다. 그 결과, 응용 프로그램은 28MIPS의 계산속도를 갖으며, 프로그램 ROM 크기는 8.85KWords 이고, 10KWords 의 데이터 ROM 과 4KWords 데이터 RAM을 필요로 한다. CSD17C00 CHIP은 멀티미디어 통신용 VOCODER 개발을 위한 범용성을 갖추고 있으며, VOCODER 용 S/W 개발 환경 및 H/W 구조가 여타 범용 DSP에 비해편의성고 K합리성을 제공하도록 설계되어 있다. 따라서, 이를 이용한다면, 멀티 미디어 통신용 VOCODER, INTERNET PHONE CO-PROCESSOR, DIGITAL RECODER, MPEG AUDIO ENCODER & DECODER 등 다양한 제품으로의 응용이 가능할 것으로 전망된다.