• Journal of Korea Multimedia Society
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• v.17 no.3
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• pp.324-332
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• 2014

This paper presents a programmable System-On-a-chip for various embedded applications that need Neural Network computations. The system is fully implemented into Field-Programmable Gate Array (FPGA) based prototyping platform. The SoC consists of an embedded processor core and a reconfigurable hardware accelerator for neural computations. The performance of the SoC is evaluated using real image processing applications, such as optical character recognition (OCR) system.

• Proceedings of the KIEE Conference
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• 2000.11d
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• pp.663-665
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• 2000

For the control system of thermal turbine in fuel and nuclear power plant, as high reliability and availability are required, redundant control system is generally applied. This paper presents the configuration and design of such a redundant control system that can be suitable for control and monitoring of the turbine. System components such as I/O system, communication networks, voting system are designed, and especially the new intelligent voter using serial communication are proposed. The characteristics of the implemented control system is independence of the control, protection and monitoring functions, and discrimination of the redundancies, and high availability. The control functions such as speed control, load control, valve control and protective functions such as overspeed and PLU are designed in detail.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.26 no.5
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• pp.58-64
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• 2012

In electric power supply systems, an earthing system determines the electric potential of the conductors related to that of the Earth's surface. The choice of earthing system has implications for the safety of the power supply systems. There are considerably different regulations for earthing (grounding) systems in each country. A protective earth(PE) conductor ensures that all exposed conductive surfaces are at the same electric potential as the earth surface. This paper deals with that when PEN conductor of TN-C-S system is disconnected, dangerous touch voltage causes personnel body to be harmed and human being's property to be damaged seriously. For this reason, this paper explains how serious problems can occur when the fault current flows. As a consequence, we can understand how we can design earthing system properly to ensure the personnel safety against earth faults. The result shows the way that TN-C-S system can be applied safely in Korea.

• Journal of the Korea Institute of Military Science and Technology
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• v.14 no.1
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• pp.30-38
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• 2011

The modern warfare needs sharing tactical situation and Command and Control(C2) capacity. Lately, developing of C2 System for Soldiers has dramatically increased according to increase of asymmetric state of hostilities like a guerilla war or a street-to-street fighting. In this paper, we explain the concepts of C2 System for Soldiers and Smart Phone. We describe the proposed system composed of HMD equipment, Smart Phone, and exclusive software. This system provides that Soldiers have C2 capacity and share the image of a visual field. It also offers efficient military power disposition and understanding tactical situation in operations.

• Journal of Korea Multimedia Society
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• v.18 no.2
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• pp.244-252
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• 2015

This paper describes the design and implementation of a System-on-a-Chip (SoC) for face recognition to use in wearable/mobile products. The design flow starts from the system specification to implementation process on silicon. The entire process is carried out using a FPGA-based prototyping platform environment for design and verification of the target SoC. To ensure that the implemented face recognition SoC satisfies the required performances metrics, time analysis and recognition tests were performed. The motivation behind the work is a single chip implementation of face recognition system for target applications.

• Korean journal of food and cookery science
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• v.22 no.5 s.95
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• pp.617-625
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• 2006

This study was done to provide basic data for the operation of a safer cook-chill system by comparing and evaluating the quality of foods which were prepared using the sous vide cook-chill system and the conventional cook-chill system, according to the preparation methods and storage temperature. Simmered chickens in soy sauce were prepared using the sous vide cook-chill system and the conventional cook-chill system and their quality was evaluated at the time of preparation and storage. Firstly, foods were prepared using the sous vide cook-chill (SVCC) system and the conventional cook-chill (CC) system and the redquired time and temperature during each preparation stage were measured and physicochemical (pH, Aw, and moisture content) and microbial qualities were evaluated. Secondly, in order to evaluate the quality and safety, the moisture content and microbial (standard plate count, coliform count, psychrotrophic bacteria count, and anaerobic bacteria count) qualities were evaluated according to the preparation methods and temperatures after the foods were stored at 3$^{\circ}C$ and 10$^{\circ}C$ for 10 days and reheated.

• JSTS:Journal of Semiconductor Technology and Science
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• v.4 no.2
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• pp.88-93
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• 2004

We, for the first time, present novel test patterns and conclusive on-chip data indicating that the variation of coupling capacitance, ${\Delta}C_C$ by crosstalk can be larger than static coupling capacitance, $C_C$. The test chip is fabricated using a generic 150 nm CMOS technology with 7 level metallization. It is also shown that ${\Delta}C_C$ is strongly dependent on the phase of aggressive lines. For antiphase crosstalk ${\Delta}C_C$ is always larger than $C_C$ while for in-phase crosstalk $D_{\Delta}C_C$is smaller than $C_C$.

• Proceedings of the Korean Society of Marine Engineers Conference
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• 2000.05a
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• pp.159-164
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• 2000

In this paper a new type refrigerant liquid subcooling system which adopts ice storage system is proposed. And the cycle characteristicso of a new system was investigated. Since this system subcools a refrigerant in the daytime using the ice storaged by electric power in the night it is high efficiency heat pump system which have the merit of ice storage system and possible to improve the performance of the heat pump. The running to storage the ie was carried out for 10 hours in the night and th evaporating temperature was set on $-5^{\circ}C.$ Subcooling operation stayed as 430^{\circ}C$ subcooling degree and perfomed till the water in the IST(Ice storage tank) was reached $12^{\circ}C$. The experimental result showed that a new system was superior to the existing refrigeration system generally. The total cooling capacity of a new system was about 11% higher than that of the existing refrigeration system. And the COP of a new system was improved by 22% compared to the existing refrigeration system.

• Journal of Power System Engineering
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• v.10 no.2
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• pp.62-67
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• 2006

The maintenance of continuity on food processing has created a need for the rapid reinstatement of many types of frozen fish to an ambient temperature and good condition. A number of thawing methods are in current use have also several disadvantages in thawing time. discoloration mass loss caused by drying, capital and running cost. These damages are, it is claimed, either eliminated or improves by the vacuum system. An experimental study on the thawing for hair tail and Yellow croaker by the vacuum system were carried out. The Yellow croaker thawing time with this vacuum system took out 170 minutes to reach from $-10.3^{\circ}C\;to\;-0.8^{\circ}C$ at 20mmHg abs. and hair tail thawing time 220 minutes to reach from $-12.2^{\circ}C\;to\;0^{\circ}C$ at 20mmHg abs.

• The Journal of the Korea Contents Association
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• v.12 no.5
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• pp.303-310
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• 2012

In radiotherapy, accurate patient positioning and set up are important factor that treatment can influence success. In generally, the 3-laser system is used when the patient set up. But today the body surface scanning system(C-Rad system) is trying to use. Compare and evaluate the C-Rad system and the 3-laser system to check availability. Head and neck that are no movement of internal organs and easy to apply fixation device are limited. Alderson Rando anthropomorphic phantom and 10 patients who have lesions of head and neck are targeted. C-RAD system's setup error mean and standard deviation are the X axis($0.55{\pm}0.51mm$), Y axis($-0.2mm{\pm}0.523mm$), Z axis($-0.85{\pm}0.587mm$) in the phantom study, and in the patient study X axis($-0.05{\pm}0.621mm$), Y axis($0.075{\pm}0.755mm$) Z axis($-1.025{\pm}0.617mm$). So C-RAD system is better than 3-laser system mostly, but C-RAD system's error rate is a little worse than 3-laser system in the Z axis. When radiation treatment of head and neck, body surface contour scanning system contribute to correct positioning and minimize the set up error.