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성승규,이명원 수원대학교 자연과학연구소 2001 자연과학논문집 Vol.4 No.-
본 논문에서는 웹 프로그래밍 기술이 없이도 일반 사용자가 웹 데이터베이스 구축과 함께 멀티미디어 홈페이지를 작성하도록 해주는 시스템 개발을 기술한다. 본 시스템은 페이지 에디터, 웹 데이터베이스를 자동 구축해주는 데이터베이스 마법사와, 웹 데이터베이스의 생성 및 수정을 지원하는 데이터베이스 관리자로 구성되어 있다. 데이터베이스 마법사는 홈페이지 템플릿과 연동되는 데이터베이스를 자동적으로 구축하는 기능을 갖는다. 페이지 에디터는 DHTML(Dynamic Hypertext Markup Language) 컴포넌트를 기반으로 구현되었으며 멀티미디어 홈페이지를 대화형으로 쉽게 지작할 수 있게 한다. 데이터베이스 관리자는 웹 데이터베이스를 생성, 수정 및 유지보수하는 기능을 제공한다. 본 시스템은 웹 데이터베이스 프로그래밍 기술이 없이도 웹 데이터베이스와 연동되는 홈페이지 작성을 쉽게 구축하도록 하는 특징을 갖는다. In this paper, we present the development of a system that helps end-users to generate home pages with the construction of their corresponding web databases without the web programming technique. It consists of a page editor, a database wizard and a database manager. The page editor creates and modifies multimedia home pages. The database wizard generates databases operated with home pages automatically, and the database manager maintains the database related to the home pages. The page editor has been made based on the DHTML(Dynamic Hypertext Markup Language) and lets users generate multimedia home pages interactively. The database manager creates, updates and manages web databases. The system has the advantage which end-users can create multimedia home pages containing databases without requiring web database programming.
김명찬,허영,윤태성 國立 昌原大學校 産業技術硏究所 2000 産技硏論文集 Vol.14 No.-
In general, the pixels are correlated in image data, especially, highly correlated among the adjacent pixels. In this paper, a new lossless image compression scheme using this fact is proposed in order to improve the compression ration and for effective transmission after the compression. The whole image is subdivided into small fixed-sized blocks and each block data are coded using the run-length and the offset coding. If all the pixels in an image block have the same data values, the run-length coding is applied, otherwise, the offset coding is applied. Based on the dynamic range of the data in a block, an image block is coded with one of 6 different offset classes. To reduce the number of data bits stored in the memory, in case of an image block having edge, the block is classified using a special code. In that case, the edge direction is detected first and the block is partitioned into 2 sections according to the edge direction, and then each section of the block is coded using the proposed offset coding method. Computer simulation results show that the bit ratio of about 5bpp for the standard images is obtained using the proposed compression scheme. Also, this scheme can support both the sequential and progressive data transmission modes.
김명규,황광성,정태상 진주산업대학교 산업과학기술연구소 2007 산업과학기술연구소보 Vol.- No.14
The purpose of this study was to design and develop a creeper for can-manufacturing that is simple for farmers to operate, light-weighted, endurable, mobile and not space-restricted. Specifically speaking, the most optimal conditions including the most appropriate number of blades and the most optimal power levels were experimentally investigated to design a portable creeper with a built-in compressor. The results of this study are as follows: 1. Circular grooves were cut on the cylinder axle itself to allow air pressure be carried to the blades, so that complicated links were removed easier and successive working was achieved. 2. The most appropriate number of blades for honeybee work was found to be 16 and circular blades were the most efficient. 3. The most appropriate power level for honeybee work was 700kg and the most appropriate out-length of the blades was found to be less than 2mm with scratches minimized.
Allylisothiocyanate 첨가가 Aflatoxin 생성 곰팡이 대사산물의 생합성에 미치는 영향
강성조,여명재,이은일,송재영,정덕화 동아시아식생활학회 1996 동아시아식생활학회지 Vol.6 No.1
The effects of allylisothiocyanate on the biosynthesis of various fungus metabolites such as sterigrnatocystin, lipid, protein, citrate RNA and AMP from the culture of Aspergillius parasiticus R-716 were investigated. The content of sterigmatocystin, the precursor of aflatoxin, was lower in the culture added with 50ppm allylisothiocyanate after 48 hours, however was rather higher after 144 hours compared to that of the control. The addition of allylisothiocyanate resulted in the increase of lipid, protein, RNA in mycelium and the content of citrate in the media, but the amount of AMP was low.
전명택,양성기 한국환경과학회 2002 한국환경과학회지 Vol.11 No.3
When the natural villages in Jeju province are incorporated into the district of city planning, they are considered to be a small-scale residential districts. Therefore, a garden city should be planned that considers the characteristics of the villages to implement an appropriate street system, to use the area effectively, and to harmonize the villages with the surrounding communities. There have been an especially large number of problems with the street system in the city of Seogwipo, which was notified as the area of natural settlement. This study analyzes the problems inherent in street planning and the present condition of roads whose construction has been postponed for a long time due to several problems including an inappropriately planned street system. Based on the research of various documents, a practical street system has been investigated. Most of the residents in natural settlement units demand use of the continued the existing roads as well as the implementation of an effective street system. They ask for street planning under which the involved construction would take only a short period of time and would result in only minimal damage to their existing properties. Therefore, the street system should be planned so as to preserve the nature-friendly features of natural settlements, their surroundings and tourism resources. Even after streets hwve been planned and their completion year has been established, the plan should be continuously evaluated, analyzed and compared with other alternatives. The street plan should continuously incorporate improvement measures which would satisfy various aspects of the street system including land use, traffic demand, and future population demands. Both the amount of money to be invested and economical efficiency should be considered for street planning since the street system has a great impact on many industries. Unnecessary costs related to excessive road construction should be avoided. The street network plan should also include the complete evaluation of the natural topography as well as the surrounding. Considering these view, the data concerning the current condition of the city and the related investigation play an important role in establishing a street plan. However, the investigation of future construction plans by the city is as of yet at a very early stage. Therefore, there is an urgent need for the investigational study of the current city development plans. The street system for the natural settlement area should be established only after the thorough investigation of all aspects of street planning. In addition, the plan should be flexible enough to consider the characteristics of Jeju.
김성환,박명환,이준일 대구보건대학 2000 대구보건대학 論文集 Vol.20 No.-
BaFBr:Eu^(2+) phosphors were fabricated and trap parameters of thermoluminescence were determined by heating rate method. The glow curve of BaFBr:Eu^(2+) consists of three peaks when the heating rate is 4 ℃/s. The temperatures of peaks are 79 ℃, 175 ℃ and 292 ℃. To determine the trap parameters, the heating rate changed from 2 ℃/s to 10 ℃/s when we measured the glow curve. As a result of heating rate method, the activation energy are 0.98, 1.38 and 1.91 eV, the kinetic order are 1.20, 2.54 and 1.46, the frequency factor are 6.7×10¹³, 2.4×10^(15) and 7.9×10^(16) s^(-1), for each peaks.
김도성,박명환 대구대학교 기초과학연구소 1998 基礎科學硏究 Vol.14 No.2
The spatial distribution of the scattered X-ray exposure for mobile X-ray radiography is measured. The scattered X-ray exposures at the radius of 50 cm, 100 cm and 150 cm from the irradiation center are 880, 180 and 50 μ R, respectively. This scattered X-rays can be reduced to 60 % by inserting the portable shield made by 0.04 mm copper sheet sandwiched in two plywoods.
박명환,김성환,이준일 대구보건대학 1999 대구보건대학 論文集 Vol.19 No.-
In this study, the highly sensitive CaSO₄:Tm-PTFE TLDs has been fabricated for the purpose of measurement of high energy electron. CaSO₄:Tm phosphor powder was mixed with polytetrafluoroethylene(PTFE) powder and moulded in a disk type(diameter 8.5㎜, thickness 90㎎/㎠) by cold pressing. The batch uniformities were average deviation 3.1%. The TLDs were determined to be R_(100)=14.5㎜, R_(50)=24.1㎜ and R_(p)=31.8㎜, respectively. The beam flatness were 4.5% as the variation of dose relative to the central axis over the central 80% of the field size at a maximum dose depth in a plane perpendicular to the central axis.
Glow 곡선 Fitting에 의한 TLD의 포획매개변수 결정
박명환,김성환 대구보건대학 1998 대구보건대학 論文集 Vol.18 No.-
Highly sensitive CaSO₄:Tm TLD are fabricated and their trap parameters are determined. The glow curve of CaSO₄:Tm consists of three glow peaks and these peaks are isolated by the thermal bleaching method. The isolated glow peaks are fitted by a least squares method. The activation energies are 0.68, 0.82 and 1.03 eV. The frequency factors are 8.09×10^(6), 9.14×10^(8) and 1.03×10^(9)/s, and the kinetic orders are 1.37, 1.54 and 1.68, respectively. The optimun temperature range of the main peak for radiation dosimetry is 220~290℃.
김성곤,최희주,정명덕,변건식 東亞大學校 附設 情報通信硏究所 1998 情報通信硏究所論文誌 Vol.6 No.1
A synchronization is important element not only wire communication but also wireless communication. Especially, In SS(Spread Spectrum) communication method used GPS(Global Positioning System) synchronization is more important. A synchronous oscillator(SO) is a network which synchronizes, tracks, filter, amplifies and divides (if necessary) in a single process. Without an input signal, the SO is a free-running oscillator, oscillating at a frequency w??, but phase changes 180。 within tracking range of SO. Therefore CPSO was used for this problem. The coherent phase synchronous oscillator(CPSO) is created by adding two external loops to the SO and has a wider tracking bandwidth and a zero-offset phase response (coherent) while maintaining the SO properties of high signal-to-rejection and fast frequency acquisition times. Therefore phase between input signal and output signal is synchronized. In this paper, GPS data recovery circuit has applied CPSO using front reference characters and has certified and excellent data recovery capability.