비정질 Fe1-x Px합금의 전기비저항

문영모, 연규황, 김택기 忠北大學校部設基礎科學硏究所 1987 自然科學硏究 Vol.1 No.1

-본문참고-

순수한 찬물속에서 발생되는 수직자연대류의 수동력학적 안정성 : 0.32≤R≤0.50에서의 중립안정 Neutral Stability in the Range 0.32≤R≤0.50

黃英奎 成均館大學校 科學技術硏究所 1988 論文集 Vol.39 No.1

This work is concerned principally with the derivation, for various values of the density extremum parameter R(0.32 ≤ R ≤ 0.5), of the numerical results that predict the physical conditions for neutral stability to the base flow generated by natural convection adjacent to a vertical, isothermal plate in cold, pure water. The present numerical study includes neutral stability results for the region of the flows corresponding to 0.32≤R≤0.50. In particular, neutral stability curves are obtained to R=0.32, R=0.34 for the two base flows corresponding to the upper and lower branch solutions. The flow corresponding to the upper solution, in general, has a higher critical Grashof number G* than does the flow of the corresponding lower solution. With the results of the present study, it is found that the strong dependence of the limit of stability on the shape of velocity profile is equivalent to the large influence of the buoyancy force on stability.

A Study on the Establishment of Destination Image through Mass Media

Hwang,Kyu-sung,Baik,Yu-kyung,Moon,Hye-young 세계문화관광학회 2007 Conference Proceedings Vol.8 No.0

As the products of mass media, such as drama, movies, and commercial advertisements have grown and entertained us, they induced people to visit the locations where they were filmed. However, little has been known what effects in movies or television-induced locations on tourism. The purpose of this study is to investigate the effects of the products of mass media on tourism through locations induced by dramas, movies, and commercial advertisements. More specially, this study examined the relationships between the perceptions of movies or television-induced affective response, the perceptions of movies or television-induced attributes and movies or television-induced destination images on tourism. Findings suggest that if audiences enjoy delightful movies, they will feel destination images with fun and delightfulness when they visit the location scene. Also, the results suggest that if dramas and movies gain in public favor, the location where they are filmed will become a new and fantastic destination to people.

유압 모터 시스템에 대한 극점 배치 제어

황규동,이창훈,조영돈,김도석 충주대학교 2006 한국교통대학교 논문집 Vol.41 No.-

Pole Placement Control has been well establish in its theory. However, its practice value is yet to be appreciated in most industries. This paper presents an account in which the control strategy is run on the hydraulic motor. Using the input and output data from actual system, estimation of the model parameters are obtained by a function ARMAX(Autoregressive Moving Average with am exogenous signal) in Matlab and controller synthesis is achieved by a Pole placement control. Estimation system from a ARMAX is defined by third order and application of Pole placement control technique will be provide not only stability but also good performance for motion of hydraulic motor in any operation condition.

Long-time Solution을 利用한 복합구조벽 해석

黃英奎 成均館大學校 科學技術硏究所 1984 論文集 Vol.35 No.2

The computer modelings of the stud-frame walls, which are two dimensional heat conduction transients and composite structure with irregular geometry and time-dependent ambient temperature, are presented. It is an application of the response coefficients method for the long-time solution by using the finite-element techniques to model the frame walls. The error caused by the spatial discretization is reduced by increasing the number of nodes used, specially dense node where the thermal diffusivity is low. The accumulation and propagation of roundoff errors can be neglected in the range of adequate number of node discretization. 60-node discretization is recommended as the optimum model for the composite plane walls when single precision is used.

有限要素法을 利用한 Burgers 방정식의 Computer Modeling

黃英奎 成均館大學校 科學技術硏究所 1985 論文集 Vol.36 No.1

A finite element method is applied to solve Burgers' equation which is an initial-boundary value problem of partial differential equation in one space dimension and time. By using a code PDECOL implementing the method of lines with a finite element collocation procedure, Burgers' equation was solved for 8 different meshs including uniform meshs and nonuniform meshs with a variable time step size. The computed solution did not converge at t=0.476 for a uniform mesh with less than 30 elements. When a nonuniform mesh with 18 elements per time step was used by concentrating the mesh in the shock region as the wave steepens, the numerical scheme converged and showed the same accurate results as that of uniform mesh with 30 elements per time step.

찬물속에 잠겨있는 등온 수직원통 주위에서의 자연대류에 관한 수치해석

황영규,이건호 成均館大學校 科學技術硏究所 1989 論文集 Vol.40 No.2

The truncate equations are formulated for natural convection flows adjacent to a vertical isothermal cylinder in cold, pure water. The resulting truncate equations, when reduced to ordinary differential equation by a nonsimilarity transformation, constitude a two point boundary-value problems. which are solved numerically using the computer code COLSYS. It is presented that the, numerical results corresponding to various values of the density extrimum parameter R(-1.014<R<0.5) and prandtl number. The results yield inferences regarding the ranges of density extrimum parameter R for existence of multiple-steady-state solutions, which have-at least two different solutions on the same physical conditions.

農民所得增大를 위한 고구마의 栽培와 利用에 관한 硏究

黃鍾奎,梁熙天,崔定植,權涌周 全北大學校 1977 論文集 Vol.19 No.-

New varieties of sweet potato Sinmi and Hwangmi were cultivated in the reclaimed hilly area of four kinds of soil series in Jeonbug province and their growth conditions such as cutting time, row spacing, application of fertilizers and plant growth regulators and covering effect were investigated. Besides these studies on cultivation of sweet potatoes, experiments on the change of chemical components of sweet potato tubers, adaptibility for storage and drying of sliced sweet potato tubers were carried out. The results are summarized as follows : 1. The early cutting of May 20, alley of 90 X 20cm, application of potassium(28kg/10a)and covering produced the high yield of sweet potatoes. The apllication of OED green did not increase the yield of sweet potatoes, 2. The yield of Hwangmi was higher than that of Sinmi. These two varieties of sweet potatoes grew well in all the test soil series except Bansan. By early cutting of May 20, the highest yield of Hwangmi was obtained in Songjung series soil and the highest yield of Sinmi was in Yesan. 3. Starch content was higher in Sinmi than in Hwangmi while yield of starch per unit area was high in Hwangmi because of its high yield of sweet potato tubers. Both Hwangmi and Sinmi showed very high water content of more than 70 per cent. The highest yield of total solid matter from Sinmi was on September 15 and that from Hwangmi on September 30. Sinmi and Hwangmi harvested on September 30 showed the highest starch content. 4. Variation in water content, starch, soluble sugar, protein and fat content during storage was minimum in the sweet potatoes stored in the temperature controlled storage chamber and was maximum in those stored in the cave under ground. As a result, percent of grade A sweet potatoes remaining was highest in the temperature controlled storage chamber and lowest in the cave under ground. 5. Hwangmi was more susceptible to Rhizopus nigricans than Sinmmi, especially under the humid condition. 6. Shape and thickness of slice did not affect the yield of dried sweet potatoes but affected the time needed for drying. Depending on the thickness and the shape of slice, variations of 36 hours and 12 hours in drying time were observed respectively. Drying table was most effective in drying of sweet potatoes and drying rack was also effective and required 2 days less time than mat. Dipping in water did not show any effect on drying time but improved the color of dried sweet potatoes.

연폭로 근로자들에서 빈혈증 관련 인자에 관한 연구

황보영,김용배,김화성,이성수,안규동,이병국 순천향대학교 교수학습개발센터 2004 Journal of Soonchunhyang Medical Science Vol.10 No.3

Objectives : This study intended to obtain the interrelationship of lead exposure indices and anemia related factors for the better health management of lead exposed workers. Methods : 502 male workers in storage battery industries as lead exposed group and 106 male office workers as contorl group were selected for this study. The examined variables wer age, work duration, smoking and alcohol crinking habit, blood zinc protoporphyin concentraion (ZPP), blood lead concentration (PbB), urinary δ-aminoevulinic acid (ALAU), hemoglobin (Hb), hematocrit (Hct), serum calcium (S-Ca), serum iron (S-Fe), total iron binding capacity (TIBC), and percentage trasferrin saturation (PTS). Results : The means of ZPP, PbB ALAU in lead exposed proup were 58.4±35.7 ㎍/㎗, 27.6±10.9 ㎍/㎗, and 1.61±2.00 mg/ℓ, respectively. These three values in lead exposed group were significantly higher than control group (P<.05). The means of Hb, Hct, S-Ca, S-Fe, TIBC, PTS in lead exposed group were 15.3±1.1 g/㎗, 47.2±4.5 %, 9.4±0.4 ㎍/㎗, 124.0±67.5 ㎍/㎗, 317.1±68.5 ㎍/㎗, and 38.7±15.2 %, respectively. Hb, Hct, S-Ca, S-Fe, and TIBC in lead exposed group were significantly lower than contrl group (P<.05). PTS was no significant difference in lead exposed group and control group (P> .05). Hct, S-Ca, S-Fe, PTS were significant positive correlation with Hb and ZPP, corrected PbB, AlAU were significant negaitive correlation with Hb in lead exposed group (P< .05). On multiple regression using ZPP as a dependent variable and PbB, S-Ca and S-Fe as independent variables after adjustment for possible confounder such as age, smoking and drinking habit, Pbb, S-Ca, S-Fe and age contributed to ZPP. Conclusions : As the result of this study, it was suggested that inclusion of S-Ca, S-Fe, PTS measurement as a anemia screening test for lead workers was highly recommended for the effective prevention and early diagnosis of anemia.

영어 사역동사 보충절의 통사구조

황규홍,민지영 東亞大學校 2005 東亞論叢 Vol.42 No.-

This paper aims to investigate the syntax of causative verb clausal complements of make, have, let, and help in English within the minimalist framework outlined in Chomsky (1999, 2000, 2001), by emphasizing their constituency and categorial status. Generally, those syntactic causative verbs select bare infinitives as their complements, even though help also exceptionally takes another type of complements : to-infinitives. I put forward the proposals: i ) such causative verb clausal complements are single constituents, by examining a variety of constituency tests : coordination, reflexives, and expletives, and ii ) their categories are TPs whose head T is defective, lacking ∮ -complete.