결혼초기가계와 중기가계의 투자행동 비교

정운영,황덕순 全南大學校家政科學硏究所 1996 生活科學硏究 Vol.6 No.-

The purpose of this study is to compare the actual investment behaviors of urban households between early and middle stage. 360 households in Kwangju were analyzed and some statistical methods were used. Major findings were as follows; 1. In the early stage and middle stage, investment behavior was significantly different according to debts, assets, total investment amounts, ratio of monthly average investment, cognition level on investment, and reasons of the selection on investment objectives. 2. The investment behaviors were revealed as follows. 1) In the early stage, the ratio of monthly average investment was different according to the job status of housewives. And the total investment amounts were significantly different according to job status of housewives. And the total investment amounts were significantly different according to job status of housewives, education level of housewives and assets amounts. 2) In the middle stage, the ratio of monthly average investment was different according to debts amounts. But the total investment amounts was according to assets amounts.

토끼의 Aflatoxin B₁중독증에 대한 인삼엑기스의 효과 : 임상, 생리적 및 병리학적 변화 Clinical, Physiological and Pathological Changes

김차용,변유성,문평일,정덕화,김종수 慶尙大學校 1987 論文集 Vol.26 No.1

Chinchilla 계통 1~1.5㎏ 되는 토끼 30마리를 5군 으로 나누어 체중㎏당 제 1군은 대조군으로서 Cornoil 0.3ml 씩 제 2군은 aflatoxin B? 0.03mg과 인삼 엑기스 8mg을 제 5군은 aflatoxin B? 0.06mg과 인삼엑기스 8mg을 3주동안 카테타로 경구 투여하여 임상, 혈액학적 및 병리학적 변화를 관찰하였다. 1.사료소비량 감소, 침울, 쇠약, 혼수, 체중증가율감소등과 같은 임상증상은 대조군을 제외한 전 처리군에서 독을 투여후 3일째 부터 전처리기간을 통하여 나타났으나 aflatoxin B? 단독처리군에서 인삼엑기스 혼합처리군보다 더 현저하게 나타났다. 2. 혈청 효소와 AST, ALT는 독물투여후 7일부터 인삼엑기스 혼합투여군 보다 aflatoxin B? 단독 투여군에서 높게 증가하였다. 3.전처리군에서 적혈수용적, 헤모글로빈농도는 영향을 받지 않았고, 혈장단백질은ㅇ 독물투여후 14일이후 aflatoxin B?단독 처리군에서 현저하게 감소하였다. 4. Aflatoxin B?과 인삼엑기스 혼합 투여군 보다 aflatoxin B? 단독투여군에서 간장의 공포변성,담관증생, 핵농축, 붕괴, hepatic fibrosis와 임파절 및 비장에서 현저한 임파양 세포의 소실을 나타내었다. The present study has been carried out to investigate the effectsof ginseng extract on induced chronic aflatoxicosis in rabits. Groups of rabbits were treated orally with aflatoxin B? and mixture of ginseng extract for 21 days with a dosage of 0.03mg, 0.06mg of the toxin and 0.03mg or o.o6mg of the toxin mixture of 8mg of ginseng extract or 0.3ml corn oil s place to per kg body weight. The results obtained were is follows. 1. Sings o toxicosis included reduction of feed consumption emaciation, decrese of body weight and coma revealed in both groups treated with 0.03mg pr 0.06,mg of aflatoxin B?/Kg/B.W than groups 4.5 after days 3. 2. In groups 2, 3(aflatoxin B? 0.03, 0.06mg), Activity of asparate aminotransferase(AST) and alanine aminotransferase (ALT)were increased sigificantly in dats7, 14 and 21. 3. In all groups, Mean values for packed cell volume(PCV)and hemogobin were unremarkasble, but plasma total protein were decreased in groups 2,3than 4,5 groups on days 14 and 21. 4. The rabits treated with aflatoxin B?(2,3 groups)showed markedly degenerative chasnges ranging from swelling and decreaseed granularity to marked vacuolation, hepatic necrosis, fibrosis and bile duct, Proliferation and depletion of lymphocytes in lymphocytes in lymphonde, spleen than groups 4,5.

Treadmill 보행시의 산소섭취량의 변화

조용규,정규철,박종덕 중앙대학교 의과대학 의과학연구소 1984 中央醫大誌 Vol.9 No.3

In order to investigate the changes in oxygen uptake during treadmill walking according to speed and grade of inclination, 74male and 33 female college students who volunteered were subjected to this study. Speed of treadmill was set to 2,4,6 and 8㎞/hr, and grade of inclination ranged from 0(level) to 25% for the male and from 0 to 12.5% for the female subjects. Oxygen uptake during treadmill walking was measured by Douglas bag method using Orzat gas analyzer. Oxygen uptake during treadmill walking increased rectilinearly with increment of speed or grade of inclination, and could be expressed as simple linear regressions of VO_2 on speed for each grade, or on grade for each speed. Average VO_2 predicted by these regression equations was proved to be valid showing the regression of the predicted on the actual value was VO_2 pred.=1.00VO_2actual-0.31(r=1.0000, S.E.E.=0.51) for the male, and VO_2pred.=1.00 VO_2actual+0.15(r=1,0000, S.E.E.=5.0) for the female. Meanwhile, although VO_2 predicted by multiple linear regression on both speed and grade of inclination(table 4) was also well correlated with the actual values VO_2pred.=0.43 VO_2actual+704.4(r=0.9860, S.E.E.=4.0) for males; VO_2pred.= 0.98 VO_2actual+32.1 (r=0.9879, S,E,E,=82.3) for females, the predicted VO_2 would be underestimated than the actual values in male subjects. Standard error of the estimate by simple linear regression was larger as the load of exercise became heavier ranging from 260 to 400ml/min for males from 80 to 190ml/min for females.

한약재가 Aspergillus parasiticus R-716의 生育과 aflatoxin 生成에 미치는 影響

구성회,이용욱,정덕화,김종규 한국식품위생학회 1988 식품위생학회지 Vol.3 No.2

한의원에서 오래 前부터 사용되어 오고 있는 몇 종의 한약재를 구입하여 이들을 chloroform으로 추출하여 추출물을 조제한 다음 공시균(Aspergillus parasiticus R-716)의 生育과 aflatoxin 生成에 미치는 影響을 조사한 결과 다음과 같은 結論을 얻었다. 1. 목단 추출물 첨가군에서 가장 현저하게 공시균의 生育이 저해되었고 그외의 첨가군에서도 강황, 봉출, 향부자, 백작액, 백출의 順으로 저해되었다. 2. Aflatoxin 生成은 백출과 강황 추출물 첨가군에서만 저해되었고, 나머지 첨가군에서는 오히려 증가되거나 효과가 적었다. 3. 백출 추출물 0.2ml첨가시 3일째부터 菌體 生成을 시작하여 9일째에 0.953g/30ml이었고, aflatoxin 함량은 792㎍으로서 대조군에 비해 약 50%가 감소되었다. 菌體 g當 aflatoxin 함량은 992㎍으로서 대조군의 1,467㎍에 비해 역시 크게 감소되었으며 NADPH oxidase 活性은 대조군보다 높아 백출 추출물이 공시균의 生育과 aflatoxin 生成에 저해 효과가 있는 것으로 나타났다. The possible effects of some oriental herbs, which have been used to treat cancerlike disease in Korea, on growth and aflatoxin production by Aspergillus parasiticus R-716 were investigated. Zedoaria rhizoma, Curcuma longa, Cyperus rotundus, Angelica gigas, Paeonia albiflora, Paeonia mountan, Atractylis ovata, and Pulsatilla koreana were extracted with chloroform. Among them the extract of Paeonia mountan was remarkably effective on the growth inhibition, and Curcuma longa, Zedoaria rhizoma, Cyperus rotundus, Paeonia albiflora, Atractylis ovata also inhibited the growth. The extract of Atractylis ovata and Curcuma longa, also inhibited the aflatoxin production but the others showed no effect at all or sometimes stimulated effect. With the addition of 0.2ml extract of Atractylis ovata in 30ml SLS medium, the growth was delayed for about 2 days, and after 9 days, mycelium weight was 0.953g, and total aflatoxin was reduced 50%(792㎍)of that produced in the control(1547㎍). Aflatoxin per mycelium weight was decreased 32%(992㎍)of that produced in the control(1467㎍), but NADPH oxidase was higher as compared to the control. The extract of Atractylis ovata appeared to have a inhibitory effect on the growth and aflatoxin production of Aspergillus parasiticus R-716.

다단계 검출알고리즘을 이용한 웨이블렛기반 이미지 워터마킹

이구영,정용덕,이종원,김정화 조선대학교 전자정보통신연구소 2002 電子情報通信硏究所論文誌 Vol.5 No.2

In this paper, we propose a watermarking algorithm of multiresolution watermarking based on wavelet transform for digital images. Watermark insertion is add to pseudo random sequences to the wavelet coefficients at the high and middle frequency band of the discrete wavelet transform. Instead of previous method, proposed multiresolution watermark decoder that allows efficient identification of the embedded a bank of watermarking key without prior notice of it. Proposed detection method aims at ensuring the maximum exactitude in the detection of the owner identification key and, minimizing the number of false positive detection.

VOCs의 위해성 평가를 위한 노출분석 방법 연구

조성준,신동천,정용,이덕희,Patrick N. Breysse 한국환경독성학회 2002 환경독성보건학회지 Vol.17 No.2

Volatile organic compounds (VOCs) are an important public health issue in Korea and many important questions remain to be addressed with respect to assessing exposure to these compounds. Because they are ubiquitous and highly volatile, special techniques must be applied in their analytic determination. Valid personal exposure assessment methods are needed to evaluate exposure frequency, duration and intensity, as well as their relationship to personal exposure characteristics. Biological monitoring is also important since it may contribute significantly in risk assessment by allowing the estimation of effective absorbed doses. This study was onducted to establish the environmental measurement, personal dosimetry and biological monitoring methods for VOCs. These methods are needed to compare blood, urinary and exhalation breath VOC levels and to provide tools for risk assessment of VOC exposure. Passive monitors (badge type) and a active samplers (trap) for the VOCs collection were used for air sampling. Methods development included determining the minimum detectable amounts of VOCs in each media, as well as evaluating collection methods and developing analytical procedures. Method reliability was assessed by determining breakthrough volumes and comparing results between laboratories and with other methods. A total capacity of trap used in this study was 60ℓ. Although variable by compound, the average breakthrough was 20%. Also, there was no loss of compounds in trap even if keep for 45 day in -70℃. The recovery of active and passive methods was 69%~126% and method detection limit was 0.24㎍/trap and 0.07㎍/badge. There was no statistical difference (P>0.05) between active and passive methods.

과학전 출품작과 현장학습의 연계성에 관한 연구

박행신,오덕철,김원택,김규용,현진오,정충덕 濟州大學校 師範大學 科學敎育硏究所 1987 科學敎育 Vol.4 No.-

In this paper, we report some sorts of result obtained by investigating the exhibits which had been submitted for "The National Exhibition of Science"and "The Science Exhibition for the Students of Cheju-do"during the last ten years and by putting the questions to the science teacher of the teacher of the middle and high schools in Cheju-do. Up to the half number the exhibits are occupied by the field of physics and biology. Almost the exhibits (above 90%) have the contents related to those of the current curriculum. However, 30.2% of the respondents only believe that their students may put the exhibits to practical use in learning. Many respondents replied that they could have not participated in the exhibition of science because they were in heavy duty and the fiscal support were not only so limited but also not sufficient enough to make an excellent work.

Color Implementation Approaches in Cu(In,Ga)Se₂ Thin-Film Solar Cells for BIPV Applications

Yong-Duck Chung,Dae-Hyung Cho,Woo-JungLee,Tae-Ha Hwang,Rina Kim,Soyoung Lim,Mangu Kang 한국신재생에너지학회 2023 AFORE Vol.2023 No.11

Analog characteristics of electroabsorption modulator for RF/optic conversion; RF gain and IMD3

Chung, Yong-Duck,Kang, Young-Shik,Choi, Kwang-Seong,Kim, Sung-Bock,Kim, Jeha Wiley Subscription Services, Inc., A Wiley Company 2006 MICROWAVE AND OPTICAL TECHNOLOGY LETTERS - Vol.48 No.6

<P>We design and fabricate a traveling-wave electroabsorption modulator for RF/optic conversion. The RF gain is measured with a simple RF/optic link. It is related to the optical transfer curve. The input optical power causes the change of the transfer curve so that the RF gain varies accordingly. The RF/optic conversion gain shows a close relationship with the slope efficiency of transfer curve. Linearity is also one of the important characteristics for analog applications. We evaluate the linearity of the module from the 3<SUP>rd</SUP>-order intermodulation distortion (IMD3). © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 1151–1155, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21564</P>

Development of colorful flexible thin film solar cells with nontoxic buffer layer

Yong-Duck Chung(정용덕),Dae-Hyung Cho(조대형),Woo-Jung Lee(이우정),Jae-Hyung Wi(위재형),Hye-Jung Yu(유혜정),Won Seok Han(한원석) 한국신재생에너지학회 2017 한국신재생에너지학회 학술대회논문집 Vol.2017 No.5