COD/SO₄ 比가 相異한 廢水의 염기성 處理時 動力學에 관한 硏究

趙容璡,全太誠 충주대학교 1990 한국교통대학교 논문집 Vol.24 No.-

A laboratory experiment was conducted in order to develope necessary design paramenters for the anaerobic treatment with different COD/SO₄ratios. The laboratory anaerobic contact diegesters were fed with a synthetic wastewater mainly containing acetic acid. The chemical oxygen demand (DOD) of the wastewater was 2,000 ㎎/L, however the COD/SO₄ratio adjusted to 1.0, 1.7, 2.7, 4.6, and 13.3. An increment of maximum substrate utilization rate(K) and a decrement of half-velocity constant (Ks) were observed at the COD/SO₄ratio of more than 2.7. At the COD/SO₄ratio of 2.7, the largest value of the maximum specific growth rate(u) as well as the smallest value of the minimum mean cell residence time (SRT ??) were observed.

야뇨증 환아들의 심리사회적 특성에 대한 다기관 연구 : 행동 및 정서 문제를 중심으로

조수철,김재원,신민섭,황준원,한상원,박관현,이상돈,김경도,김건석,서홍진,이유식,정재용,김영균,문두건,남궁미경,한창희,조원열,김영식,배기수,이종국,정우영,신의진 大韓神經精神醫學會 2005 신경정신의학 Vol.44 No.6

Objectives : The aim of this study was to examine the behavioral and emotional problems associated with nocturnal enuresis in Korean children. Methods : Three hundred eighteen children with nocturnal enuresis, together with their parents, completed the Child Behavior Checklist (CBCL), Disruptive Behavior Disorder Scale according to DSM-IV (DBDS), Children's Depression Inventory (CDI), State-Trait Anxiety Inventory for Children (STAIC), and Piers-Harris Children's Self-Concept Scale (PHCSC). Ninety-three normal students were selected as the control group. Results : Compared to the normal control group, the mean scores with regard to the withdrawn, social problems, attention problems, delinquent behavior, aggressive behavior, externalizing problems and total problems profiles were significantly higher in the nocturnal enuresis group according to the CBCL results. The nocturnal enuresis group also scored significantly higher in the ADHD and ODD profiles of the DBDS. The nocturnal enuresis group was more depressed and anxious than the control group according to the results of the CDI and STAI. The mean score of the PHCSC was significantly lower in the nocturnal enuresis group when compared to the normal control group. Conclusion : The results of this study suggest that children with nocturnal enuresis in Korea have clinically relevant behavioral and emotional problems. The findings support the link between nocturnal enuresis and psychopathology in Korean children.

초고속 전송에 대한 Ultrashort Laser Pulse의 새로운 스펙트럼 분석

전진성,조형래,오용선 韓國海洋大學校電波通信硏究所 1999 電波通信硏究所論文集 Vol.1 No.-

본 논문에서는, Class-2 PRS 모델의 전달함수인 Raised-Cosine 펄스를 이용하여 극초단 레이저펄스의 전송특성을 분석하였다. 이는 Class-1 PRS 모델에서와 같이 부분응답시스템의 수정된 모델로부터 얻어지는 고차원펄스를 이용하여 그 차수의 증가에 따라 FWHM폭이 현저히 감소하여 분석하고자 하는 극초단펄스의 형태에 근접하는 펄스를 제시하였으며, 그 스펙트럼과 전송대역폭도 차수에 따라 일률적으로 유도되므로 Gaussian, Sech형태의 펄스 같은 고전적인 방법과는 달리 광범위하고 정확한 전송특성을 분석하는데 매우 유용함을 밝혔다. 먼저, 부분응답시스템의 일반적인 모델을 수정하여 어떤 형태의 고차원펄스도 적용할 수 있는 새로운 방법을 제안하였다. 그리고 제안된 모델을 이용하여 어떠한 형태의 FWHM을 가지는 극초단펄스의 전송에 대한 새로운 분석 방법을 제안하였다 제안된 방법을 사용하여, 설정 펄스 폭을 τ=1(㎰)으로 설정, 고차원펄스의 차수 n=1~100에서 얻어지는 FWHM 1(㎰)~100(fs)의 극초단펄스의 스펙트럼을 제시하였고, Class-2 PRS 모델의 FWHM 폭이 Class-1 PRS 모델보다는 차수 n에 따라서 약 50~100(fs)정도 좁은 FWHM 폭을 가짐을 밝혔다. 이에 대한 전송특성은 레이저펄스의 보편적인 신호방식인 Unipolar 체계로 설정하여, 가능한 펄스간격에 따른 PSD를 유도하여 제시하였다. 이러한 결과들은 고전적인 실험 방법과는 일치함을 물론 미래 극초단펄스 연구에 대한 혁신적인 방법으로 사용될 수 있을 것이다. In this paper, we analyze transmission characteristics of ultrashort laser pulses using the property of Raised-cosine pulse which are systematically obtained following Class-2 PRS model. The high-order pulses are easily derived from a modified PRS system model as Class-1 PRS model. This may be based on the fact that the spectra and bandwidths of the high-order pulses are beautifully related to their orders. And we make clear they are very useful to cover wider area and more accurate transmission characteristics of ultrashort pulses than Gaussian or Sech pulse approximations used conventionally. First modifying the generalized PRS system model, we propose a new model for deriving any type of high-order pulse. And we offer a novel analysis method of ultrashort pulse transmission which has any shape and FWHM, using the proposed model. In addition, by fixing the pulse range τ=1(㎰) and varying the order of the pulse from n=1 to n=100, we obtain spectra of ultrashort pulses with 1(㎰)~100(fs) FWHM's, and width of FWHM in the Class-2 PRS model 50~100(fs) smaller than Class-1 PRS model. As a one-step further, we derive PSD's of their pulse trains when they are applied to Unipolar signaling scheme. These PSD's are decided in the range of possible pulse intervals. All of these results are not only coincided with some conventional experimental works but also will be applied to any pioneering ultrashort pulse in the future.

가압기포탑 반응기에서 기포의 Chaotic 거동해석

조용준,고명한,강용 충남대학교 공업교육연구소 1999 論文集 Vol.22 No.1

Chaotic behavior of bubbles has been investigated in a pressurized bubble column(0.1-0.6MPa). The bubble properties have been measured by means of resistivity probe method and the pressure fluctuations by the semi-conductor type pressure transducer. The number density distributions of the individual bubble chord length have been represented by the logarithmic normal distributions, by which the mean chord length of a bubble has been determined. The pressure fluctuations due to the bubbling phenomena in the column have been analyzed by resorting to the deterministic chaos theory; the mutual information function, phase space portraits and correlation dimension have been obtained from the time series of pressure fluctuations. It has been found that the mutual information function, phase space portraits and correlation dimension can be utilized to describe and explain the non-linear dynamical behaviors as well as the bubble properties in pressurized bubble columns, since they can provide quantitative measures of dynamical behaviors, arising from the complex gas-liquid flow.

폐결핵의 조기진단에 있어서 이중중합효소연쇄반응법의 유용성

조성란,최영진,김용훈,이철세,김영창,김휘준 순천향의학연구소 1998 Journal of Soonchunhyang Medical Science Vol.4 No.2

Background: Pulmonary tuberculosis is a great public health problem in Korea. Early detection of Mycobacterium tuberculosis (M. tuberculosis) in clinical samples becomes more and more important in the control of tuberculosis. Recently, molecular methods have been applied to early detection of M. tuberculosis. Methods: To elucidate the effectiveness of nested polymerase chain reaction (PCR) in early diagnosis of pulmonary tuberculosis, we peformed Acid-fast bacilli (AFB) stain, AFB culture, and nested PCR on 84 sputa. Results: 8 (9.5%) specimens were positive by AFB stain, 17 (20.2%) by AFB culture, and 15 (17.9%) by nested PCR. Using AFB culture as standard method, the sensitivity of AFB stain and nested PCR was 47.1% and 82.4%, respectively. The specificity of AFB stain and nested PCR was 100% and 98.5%, respectively. Conclusions: Nested PCR was more sensitive than AFB stain and had shorter processing time(24-48hrs) than AFB culture. So it may be effective to use nested PCR in order to detect M. tuberculosis when AFB smear Is negative.

고등어 및 정어리 선어의 휘발성성분

조우진,김훈,정연정,이영미,정은정,차용준 창원대학교 생활과학연구소 2002 생활과학연구 Vol.- No.6

This study was conducted to identify volatile compounds, associating with quality deterioration, which may play roles as indicators for quality assessment in fresh mackerel and sardine. Volatile compounds were analyzed by liquid liquid continuous extraction(LLCE)/GC/MSD methods. A total of 83 and 81 volatile compounds were detected in fresh mackerel and sardine, respectively, and these compounds were mainly composed of aldehydes(12 in raw mackerel, 11 in raw sardine), ketones(7, 4), alcohols(15, 14), esters(1, 3), aromatic compounds(13, 15), terpenes(5, 7), S-containing compounds(2, 2), hydrocarbons(13, 11) and miscellaneous compounds(2, 1). Most of compounds including carbonyls, alcohols, aromatic compounds and hydrocarbons were derived from lipid oxidation, and some compounds were detected from microbial degradation. It was supposed that LLCE method was proper to seek indicators for quality assessment in fresh mackerel and sardine, because of various volatile compounds derived from nonthermal lipid oxidation.

소규모 하천 수질 예측을 위한 Computer Program(I)

趙容璡,全太誠 충주대학교 1997 한국교통대학교 논문집 Vol.32 No.2

There are many computer modeling programs for the river and lakes. QUAL2E is the most useful program in the U.S.A. But it does not fit to small rivers in Korea.And the language,Fortran 77, is uncomfprtable for the users. So I've studied it with Visual Basic in the windows system.

한국 정신장애의 역학 조사 연구[I] : 각 정신장애의 유병률

조맹제,함봉진,김장규,박강규,정은기,서동우,김선욱,조성진,이준영,홍진표,최용성,박종익,이동우,이기철,배재남,신정호,정인원,박종한,배안,이충경 大韓神經精神醫學會 2004 신경정신의학 Vol.43 No.4

Objectives : This study aims to estimate the prevalence of the DSM-IV psychiatric disorders in Korean population using the Korean version of Composite International Diagnostic Interview (K-CIDI). Methods : Subjects were selected by taking multi-stage, cluster samples of 7,867 adult household residents, 18 to 64 years of age, in ten catchment areas. Total 78 trained interviewers administered the K-CIDI to the selected respondents, from June 1 to November30,2001. Results : Total 6,275 respondents completed the interview. Some 33.5% of respondents reported at least one lifetime disorder, 20.6% reported at least one-year disorder, and 16.7% reported at least one-month disorder. The most common lifetime disorders were alcohol abuse/dependence (17.24%), nicotine dependence/withdrawal (11.19%), specific phobia (5.16%), and major de-pressive disorder (4.25%). The lifetime prevalence of substance abuse/dependence (0.25%) and schizophrenia (0.16%) was very low. Nicotine and alcohol use disorder showed very high male/female ratio. Mood disorder and anxiety disorder were more prevalent among female than male. Conclusion : The prevalence of psychiatric disorders was high. In comparison with other studies, remarkable differences in distributions of psychiatric disorders across the areas and times were observed.

정량적관상동맥조영술의 정확도 및 재현도

조용근,황진용,박헌식,채성철,전재은,박의현 慶北大學校 醫科大學 1996 慶北醫大誌 Vol.37 No.4

목적 : 정량적관상동맥조영술이 최근 널리 보급되고 있지만 국내외를 막론하고 이의 정확도 및 재현도에 관한 연구가 불충분하여 본 연구를 하였다. 대상 및 방법 : 110명의 환자에서 미국 General Electric사의 Advantx L/C/LP 디지탈혈관찰영기와 미국 USCI사의 좌관상동맥용 Judkins형의 Pro-Flo XT^(TM) 6F 도자를 이용하여 좌관상동맥조영술을 같은 각도에서 3회 실시하고 도자의 외경을 일본 Mitutoyo사의 정밀도 0.01㎜의 micrometer로 측정한 후 측정된 도자의 실제 직경과 정량적관상동맥조영술로 측정된 관상동맥의 직경을 비교하였다. 결 과 : USCI® Pro-Flo XT^(TM) 6F 좌관상동맥용 도자의 실제 외경은 1.91±0.03㎜이었고 정량적관상동맥조영술로 측정 한 도자의 외경은 1.94±0.11㎜이었다. 도자를 5.7F로 calibration했을 매 도자의 외경은 1.87±0.12㎜이었다. 세번 다 다른 화상에서 측정한 경우 근위부관상동맥 직경의 차이는 0.02±0.12㎜이었고 같은 화상에서 3회 측정하였던 경우에는 0.11±0.01㎜이었다. 결론 : 정량적관상동맥조영술의 정확도 및 재현도는 사용에 적합한 정도이나 적지 않은 문제점에 대한 보완이 필요하다고 생각된다. During quantitaive coronary angiography(QCA), contrast filled catheter is usually used as a scaling device. However the real diamerer of catheter is almost always smaller than the listed diameter. We measured the real diameter of catheters with precision micrometer(Mitutoyo® Japan). After caliberating the catheter as listed French size and diameter, we did QCA at the same tube position of the diameters of catheter and proximal left coronary artery. All measurements were done 3 times consecutively. The mean real diameter of USCI® Pro-Flo XT^(TM) 6 F left Judkin catheter was 1.91±0.03 ㎜. The mean QCA diamter of the same catheter was 1.94±0.11 ㎜. When we calibrated catheter as 1.91 ㎜. the mean QCA diameter was 1.87±0.12 ㎜. The mean differences of the diameters of the proximal left coronary artery were 0.20±0.12 ㎜ when the measurements were done in three different frames. When the measurements were done in the same frmae, the mean difference decreased to 0.11±0.01 ㎜. We conclude that the precision and reproducibility of QCA are within reasonable range, but more refimement is needed.

비화농성 삼출성 복수를 동반하는 질환에서 복막 침생검의 진단적 의의

정종훈,서용태,오덕환,채종구,정춘해,조건국 朝鮮大學校 附設 醫學硏究所 1986 The Medical Journal of Chosun University Vol.11 No.1

Percutaneous needle biopsies of peritoneum with Abrams needle and Cope needle were done un 64 patients with non-purulent exudative ascites, who was admitted to the department of internal medicine, Chosun University hospital, from January 1978 to Deccmber 1983. The diagnostic significance and safety of the needle biopsy was estimated. The results were as follows. 1. Adequate peritoneal tissue for pathological diagnosis was obtained in 53 cases(82.8%) among 64 cases. (Abrams needle 84.8%, Cope needle 80.6%) 2. Definitive diagnosis was obtained in 31 cases among 53 cases (58.6%). (Tuberculosis 23 cases, malignancy 8 cases). 3. As compared final diagnosis with biopsy result, the rate of final diagnosis corresponding with biopsy diagnosis was 58.8% in tuberculosis and 26.3%, in malignancy, but the rate of biopsy diagnosis corresponding with final diagnosis was 100% in both tuberculosis and malignancy. 4. Cases of chronic non-specific inflammation which were diagnosed by biopsy were 13cases(24.5%)among 53 cases, and among these cases, tuberculosis was 69.2% and malignancy 30.8% on final diagnosis and among 53 cases, histologically normal was 9 cases(16.9%) of which 33.3% was tuberculosis and 66.7% was malignancy on final diagnosis. 5. Of the malignant cases on final diagnosis, Positive cytologic examination of ascitic fluid was 16.7% 6. Primary losions of cancerous peritonitis were stomach cancer (38.9%) hepatocellular cancer(22.2%) colon cancer (11.1%) ovarian cancer (11.1%) Pancreatic cancer (5.6%). 7. Complication of percutaneous peritoneal biopsy was local swelling with leakage of ascitic fluid and the accident rate were 36.4,% in Abraham needle and 3.2% in Cope needle.