가막만 패류양식장의 수질 및 저질특성

최철웅,문성용,윤호섭,라성주,한종석,최상덕,이우범 國立 麗水大學校 環境問題硏究所 2002 環境硏究論文集 Vol.5 No.-

This study was performed to characterize the seasonal fluctuation of water quality and sediment environment from April, 2001 to November, 2001 in Gamak bay. Which was a productive area, but recently its fisheries conditional have been deteriorated because of increasing waste-water from municipal area, industry and autochthonous pollution by farm industry. In the survey of seawater quality, DO and COD concentrations were lowest in bottom layer at summer, but DIN and DIP contents were higher than those in surface layer. Eutrophication indices mean that eutrophication area move from south to north entrance via northern-west inner area with seasonal change from summer to autumn. In the survey of sediment environment, ignition loss(IL), chemical oxygen demand(COD), DIN and Dip were in the range of 3.8~15.7%, 10.3~60.6mg/g-dry, 5.053~1.810mg/ℓ and 0.065~0.324mg/ℓ , respectively. COD in sediment were highest at winter and spring. And, they were higher than sediment standard in the south inner area, which mean heavily polluted conditions with organic constituents.

적외선 센서를 이용한 다종가스 계측기 구현

최낙진,류정호,강봉휘,이광우,이덕동 경북대학교 센서기술연구소 1997 센서技術學術大會論文集 Vol.8 No.1

The semiconductor gas sensors with a tin oxide as the raw material have been generally used to detect gases in the principle of electrical conductivity variation. However, it was difficult to design the gas detection system due to the non-selectivity, the non-stability and the influence of temperature, humidity etc. Therefore, it was proposed NDIR(non-dispersive infrared) method using pyroelectric infrared sensor to overcome the disadvantage of the semiconductor gas sensors. This method has been recently used to detect various gases in industrial parts. It has the advantages of selectivity, stability and responsibility. The gases used in this paper were CO_(2)(carbon dioxide) and HC(hydrocarbon) series. The system was designed with the Intel MCU i8097BH microprocessor. Main topics were to remove interference effect for other gases and to minimize influence for ambient circumstance by using the software and the hardware techniques.

수상관의 밝기 및 해상도를 고려한 기준 백색 설정

최덕규,한찬호,정영헌 경운대학교 산업기술연구소 2001 産業技術硏究論文誌 Vol.3 No.2(C)

Reference white in color television receiver can be achieved by adjusting the RGB gun current ratio and it is necessary to provide additional gain ratio adjustment for the RGB video signal. Generally, the gun current density profile has a Gaussian distribution and the gain-bandwith product of RGB channel amplifier is constant. Therefore brightness and spatial resolution are changed with variations in reference white of receiver. In this paper, the effect of RGB gun current and channel gain ratios on brightness and resolution of CPT is analyzed. Brightness is increased with the color temperature of reference white because of Holmholtz-Kohlrausch effect. The change in light output is more abrupt and spatial resolution is improved with unity current ratio. For more bright and improved resolution we also present the range of color temperature of reference white for P22 phosphors.

온도; pH, 염분 내성 및 충격이 개불, Urechis unicinctus 유생에 미치는 영향

최상덕,김호진,라성주,정형택,윤호섭,신종암,이원교 國立 麗水大學校 環境問題硏究所 1999 環境硏究論文集 Vol.2 No.-

The effect of different temperature, salinity and pH on survival rate of Urechis unicinctus's swimming embryo was examined to develop the method for the efficient seed production. In addition to, this study was designed to investigate the possibility of pollutant marker diagnosis of marine pollutions by the change in different temperature, salinity and pH. Treatment was carried out whit different temperature (5˚C, 10˚C, 17˚C, 20˚C, 25˚C,), salinity(0‰, 10‰, 20‰, 30‰, 34‰, 40‰) and pH(4, 6, 7.2, 8.2, 9.2, 10). All the swimming embryo of the temperature experiment was survived within all experiment section, but the others experiment were not. At the temperature-shock and tolerance experiment ranging from 5˚C to 25˚C the survival rate was occurred: 75%, 95%, 100%, 100%, 50%, at the ph-Shock experiment ranging from 4 to 10, the survival rate was occurred: 0%, 50%, 85%, 100%, 60%, 0%, at the pH-tolerance experiment ranging 4 to 10 the survival rate was occurred : 0%, 75% 90%, 100%, 80%, 0%, and at the salinity-shock experiment ranging from 0% to 40% the survival rate was occurred : 0% 10% 90% 95% 100% 0% , at the salinity-tolerance experiment ranging from 0% to 40% , the survival rate was occurred : 0% 0% 90% 100% 100% 0%. These results suggest, that the survival rate of larvae of Urechis unicinctus was the highest at 17˚C, 34%. pH8.2 and this Urechis unicinctus could be live at the zone of euryceious and zone of euryhalines

가우시안 빔 프로파일의 CPT를 위한 비선형 주사속도변조

최덕규,한찬호,정영헌 경운대학교 산업기술연구소 2001 産業技術硏究論文誌 Vol.3 No.2(B)

A scan velocity modulation(SVM) technique has been widely used for compensating the deterioration of picture quality due to the beam profile effect of the color picture tube(CPT). In conventional SVM system the so-called linear SVM method has been employed, whose modulation velocity is linearly proportional to the variation in the video signal amplitude. However, the effect of picture quality improvement is irregular with video signal amplitude in the linear SVM. In this paper we report a theoretical analysis of the SVM effect on the spatial brightness distribution of CPT according to the variations in luminance signal amplitude and differentiation circuit characteristic. We also propose a nonlinear SVM method based on the results of the theoretical analysis for optimum picture quality improvements. In computer simulation we confirmed uniform improvements in picture quality by the SVM of nonlinear amplitude transfer characteristic.

특발성 좌심실빈맥(Idiopathic Left Ventricular Tachycardia)의 성공적인 전극도자절제술을 위해 단극전기도(Unipolar Electrogram)가 유용한가?

최기준,남기병,강덕현,홍명기,송재관,김재중,박성욱,박승정,박종훈,김유호 대한순환기학회 2000 Korean Circulation Journal Vol.30 No.4

소아 제 2형 당뇨병 환아에서 maturity Onset Diabetes of the Young(MODY) 3의 유병률에 관한 연구

최인경,김덕희,김호성,허남,백상현,정성영 대한소아과학회 2004 小兒科 Vol.47 No.6

한국산 개불, Urechis unicinctus의 서식생태에 관한 연구

최상덕,김호진,이원교,서호영,이우범 國立 麗水大學校 環境問題硏究所 2000 環境硏究論文集 Vol.3 No.-

For the commercial culture of marine echiuran worm Urechis unicinctus, a series of basic ecological study has been conducted for fishery period(November, 1998~April, 1999) in the laboratory and southern coast of Korea. The environmental factors of echiurans' habitat such as water temperature, salinity and dissolved oxygen were ranged 8.0~14.9 °C, 30.1~33.1 psu 7.0~8.9 ㎎/ℓ, respectively. The habitat sediments were composed of coarse sand, sand silt and silty sand. The highest densities and biomass of U. unicinctus were found in areas of the sand silt. In the laboratory, all echiurans performed burrowing success in coarse sand and sand within 24 hours, but none did in silt and clay within 10 days. In sand silt, echiurans enabled to dig 0.7~2.8 burrows/day/ind. And U. unicinctus made a burrow of U shape.

電子資料處理組織에 의한 會計循環過程 硏究

孫聖鎬,崔德圭 東亞大學校 1983 東亞論叢 Vol.20 No.2

The manual accounting data processing systems has the following disadvantages: 1. Lack of timeliness ot provide the accounting information 2. Lack of accuracyto generate the accounting information 3. Overburden of labor wages for accountants Therefore, the objective of this thesis is scheduled to improve the above weaknesses of the manual accounting data processing system, develop the programs for the company attempting to computerize the routinzed accounting works and computerize the accounting cycle through the Electronic Data Processing Systems. And it looks for the advanced accounting education system to be performed through the E.D.P.S. And this study classifies the process ranging from recording accounting transactions to preparing financial statements as follows: 1. Recording the journal slips 2. Recording the general ledger 3. Tabulating the trial balance 4. Preparing the financial statements (B/S, I/S) To computenze the above accounting cycle, I make the chart of accounts according to the output data-general ledger, trial balance and financial statements. The transaction files are structured to process and store accounting data efficiently plus maintained to retrieve them at any time. These procedures can be described as follows: According to the above procedures, in Chapter 2, charts of accounts of Balance Sheet and Income Statement are provided by Accounting Stadards. And it is produced through the line printer located in E.D.P. Department of Dong-A University. We have a general-purpose computer, IBM/370-J01. In Chapter 3, accounting cycle, accounting cycle steps and flowchart of accounting data processing systmes are figuredin datail. And business diary and journal slips of Seung Hak Company are written from January 1, 19XX to December 31, 19XX. Transaction data on journal slips are punched to the diskettes adn stored on disk. And that, 41 accounts and 2 trial balances are produced through the computer. After that, balance sheet and income statement programmed in PL/1 are generated through the computer. Although these documents can be written by man-machine assisted system, accounting cycle should be automated by accountants and E.D.P. employees. Therefore I suggest my opinions as follows: 1. Accountants make efforts to computerize accounting works. 2. Accountants have close relations with E.D.P. employees. 3. Accounting students complete coursework in basic computer programming. 4. Accounting students have knowledge of capabilites and limitations of electronic data processing systems.

전자 빔 프로파일에 의한 밝은 영역에서의 명암 보정

한찬호,정영헌,최덕규 경운대학교 산업기술연구소 2001 産業技術硏究論文誌 Vol.3 No.2(B)

In this paper, we present a compensation method of contrast loss in highly bright region by CPT beam profile. In the proposed method, the local difference signal for the compensation is transformed according to the local mean of luminance. In computer simulation, clear image is obtained by the compensation of contrast loss in highly bright region.