하상경사가 변화는 실험실 데이터를 이용한 Chiu의 유속공식과 Manning 의 유속공식과의 비교분석

추태호(Choo, Tai-Ho),옥치율(Ok, Chi-Youl),이승관(Lee, Seoung-Kwan),제성진(Je, Sung-Jin) 한국산학기술학회 2007 한국산학기술학회 학술대회 Vol.- No.-

현재까지 수리학 분야에서 가장 많이 회자되고 인용된 공식이 있다면 아마도 1890년에 발표한 Manning의 유속 공식이라고 해도 과언은 아닐 것이다. 그만큼 그 쓰임새가 많았을 뿐만 아니라 사용의 편리성과 정확도에서도 매우 우수하였기 때문일 것이다. 그러나, 아무리 우수한 공식이라도 약점이 있듯이, Manning의 유속공식 역시 조도계수n을 추정하는데 많은 어려움이 있는 것도 주지의 사실이다. 이러한 어려움을 극복하기 위하여, 본 연구에서는 확률통계에서 사용되는 엔트로피 개념을 이용한 3차원 유속분포식인 Chiu의 유속공식을 사용하였다. 그러나 지금까지 실증적으로 Chiu의 유속공식과 Manning의 유속공식을 비교분석하였던 논문은 Chiu와 Choo의 논문에서 일부 언급된 것 외 논문에서는 찾아볼 수 없는 것이 현실이다. 따라서 본 연구에서는 하상경사를 임의로 변경 가능한 실험수로를 선택하여 정밀법에 의한 유속측정을 우선 실시하였다. 같은 지점의 같은 단면에서 하상경사(Ө)가 0.000935부터 0.025794까지 28번의 경사변화를 주고 각 경사마다 유량을 측정하여 28개의 유량측정 데이터를, Chiu의 유속공식과 Manning의 유속공식에 각각 적용하여, Chiu의 M과 Manning의 n사이의 관계뿐만 아니라, 하상경사변화에 따른 관련인자들을 함께 분석하였으며, 실측된 평균유속과도 함께 분석하였다.

골수이식 후 골밀도 및 골대사의 변화 : 2년 추적관찰 2-Year Prospective Study

이원영,강무일,오은숙,오기원,한제호,손현식,윤건호,차봉연,이광우,손호영,강성구,신완식,민우성,김춘추 대한내분비학회 2000 Endocrinology and metabolism Vol.15 No.4·5

교량기초 지반의 액상화 가능성 평가

추진호,강태호,조성호 中央大學校 建設環境硏究所 2002 環境科學硏究 Vol.13 No.1

흙의 액상화저항 산정은 많은 지질 공학적 조사에 있어서 중요한 단계이다. 일반적으로 Seed-Idriss가 제안한 간편법이 널리 사용되고 있다. 간편법은 N치를 이용하는 것이 보편적이 나, 근래에는, SHAKE(Schnabel, et al., 1972)와 같은 지반응답해석 프로그램의 결과인 깊이별 최대 가속도를 이용한 수정 Seed and Idriss 방법이 선호되는 추세이다. 또한, 자갈이 있는 곳이나 시추가 불가한 지역에서 전단파 속도를 이용한 Andrus and Stokoe 방법이 새롭게 도입되어 사용하고 있다. 본 연구에서는 7개 지역의 철도교량 기초지반에 대하여 수정 Seed-Idris s방법과 Andrus and Stokoe 방법으로 액상화 가능성을 평가하였다. 그리고, 해석 결과에 대한 신뢰성을 향상시키기 위하여 현장에서의 전단파 속도는 SASW 실험과 전단 탄성계수 및 재료의 감쇠비는 공진주 실험 결과를 이용하였다. 수정 Seed-Idriss 방법과 Andrus and Stokoe 방법은 비슷한 결과를 나타내었으며, 국내 지반에 처음으로 적용된 Andrus and Stokoe 방법이 신뢰성 있는 액상화 평가 결과를 제시하는 것으로 확인되었다. 따라서, 전석층, 자갈층 등이 특히 많은 교량기초 지반의 경우 Andrus and Stokoe 방법(신뢰성있게 액상화 가능성을 평가할 수 있는 방법이라고 판단되었다. Evaluation of the liquefaction resistance of soils is an important step in many geotechnical investigations. Generally, the counts of the Standard Penetration Test(SPT). However, recently, the modified Seed-Idriss simplified procedure uses the peak ground surface acceleration, which was obtained by the site response analysis. A new procedure by Andrus and Stokoe uses shear-wave velocities to evaluate the liquefaction resistance of soil. The method is useful specially at sites where boring activity is net allowed. In this study, liquefaction susceptibility analysis for the subsurface of railroad bridge was performed both by the modified Seed-Idriss simplified procedure and by the Andrus-Stokoe procedure. Furthermore incorporated to make a better evaluation of liquefaction analysis. Consequently, both methods turned out to give the same results far the liquefaction susceptibility, which implies that the Andrus-Stokoe procedure proved to be a reliable and useful approach in the river-bed geothechnical site with gravels, cobles etc.

폐기물 성상과 매립방식에 따른 침출수 특성

성낙창,김은호,문추연,김정권,장성호,김수생,박출재 동아대학교 환경문제연구소 1996 硏究報告 Vol.19 No.1

In this study, we can be obtained the following conclusions about the characteristics of leachate with waste compositions and landfill methods. pH shows a tendency to increase in E. landfill, because NH₃ is created by anaerobic degradation and dissolved in leachate. The concentrations of BOD and COD become different, In case of E. landfill, food of combustible is H. & S. landfill and then SS is high in concentration. According to passed time, T-N is high in concentration, but T-P shows a similar tendency. Heavy metals of leachate is lower than threshold concentrations. If leachate is treated biologically, microbes are not inibitory.

UCC의 유용성 및 즐거움과 UCC전문사이트 태도의 관계

추호정,정선미,김상조 동의대학교 경제경영전략연구소 2010 經濟經營硏究 Vol.5 No.1

In this study, exploring some necessary factors of new emerged UCC site, for achieving the differentiation against the existing web-service company such as the portals, will be the main purpose. To achieving the purpose of this study, the theory research and the quantity research have been done simultaneously. And, the covariance structural equational model was used for verifying the hypothesis. The summary of result is like below. First, It shows that the usefulness and the playfulness, one of the properties of UCC, give mindful influence on formation of intimacy for the site as a intervening variable under the on-line environment as UCC site. Secondly, It shows that while the playfulness of UCC affects the meaningful influence on interaction, the usefulness of UCC does not affects any meaningful influence on interaction. Thirdly, the interaction factor gives a meaningful influence on the intimacy. In other words, higher interaction of users in the current UCC site induces more positive feelings and intimate relationship, which is enough to lead revisiting the sites from users. Fourthly, the intimacy and interaction of the site affect meaningfully for the intention of revisiting of UCC site. Particularly, the intimacy estimate affected double than the interaction for the intention of revisiting of UCC site.

반코마이신 내성 장구균 감염에 대한 quinupristin-dalfopristin 치료 경험

추은주,최상호,조영환,정선미,김백남,김남중,김미나,김양수,우준희,류지소 대한화학요법학회 2002 대한화학요법학회지 Vol.20 No.1

VRE 감염이 중환자에서 급속히 증가하고 있으나 이에 대한 확실한 치료제가 없어 새로운 항생제에 대한 활발한 연구가 있는데 그 중 하나가 quinupristin/dalfopristin이고, 저자들은 중증 환자들의 VRE 감염에 대해 quinupristin/dalfopristin를 투여하여 치료한 임상적 경험을 하였기에 문헌고찰과 함께 보고하는 바이다. Vancomycin-resistant enterococci (VRE) was first recognized in 1992 in Korea. VRE infection have been increasingly reported in immunosuppressed patients over the past decade and have become one of major nosocomial pathogens. Clinicians carings for patients with VRE infections face severe constraints in the selection of treatment. Quinupristin/dalfopristin is active in vitro againt vancomycin-resistant E. faecium (VREF), with a MIC_(90) of 1.0㎍/mL. We studied the clinical efficacy and safety of this agent in the treatment of VREF infection. Patients were included if they had signs and symptoms of active infection including bacteremia, intra-abdominal infection, and wound infection. A total of 13 patients with VREF infection were enrolled. A favorable clinical response (cure or improvement) occured in 10 of 11 evaluable patients. The only adverse events related to quinupristin/dalfopristin were arthralgia and myalgia, which occurred in 2 of 13 patients. These results suggest that quinupristin/dalfopristin is effective and safe as treatment for VREF infections in critically ill patients with serious underlying conditions.

생체 내에서 Cholesterol이 간기능에 미치는 영향

김종호,윤기은,추상규 원광보건전문대 1992 원광보건전문대학논문집 Vol.15 No.-

點郡 3㎖(H) 의 振動寫眞 및 Weissenberg寫眞에서의 特性

이진호,류보영,조소라,김문집,추금홍,서일환,임성수 순천향대학교 1993 논문집 Vol.16 No.3

Crtstallographic cell constants of point group ?? are a =b≠c, α=β=90。, and γ=120。. There are mirror plane symmetries in oscillation photography taken at a-axis and b-axis, but no plane symmetry at c-axis. Since Weissenberg zeroth layer taken at a- and b-axis obeys Friend's law, half of the photography shows non-symmetric unit of diffraction intensity. There are 6 mirror planes in the Weissenberg zeroth layer when the photography was taken at c-axis, therefore 1/12 of the unit cell is non-symmetric unit.

직업 유무와 진균 감염

오상철,홍성호,조주연 순천향대학교 교수학습개발센터 2004 Journal of Soonchunhyang Medical Science Vol.10 No.3

Back ground : This study was designed to evaluate the relation fungal infection with the males and females with/without occupation and to evaluate cause of fungal infection Methods : This study was done via direct interview and KOH mount with 03 patients who are oupatients in a university hospital from July 2000 to Aprill 2001. They were divided into three groups, males with occupation, females with occupation, females withoup occupation and sudied by sex, age, duration, types of dermatophytosis, site of infection, infection in families. Results : The results were as follows 1. Fungal infection was 40% in males with occupation, 24% in females with occupation, 36% in females without occupation. 2. The site of fungal infection was the offices(42.5%), the families(30%) in men with occupation and the families(54.2%), the offices (41.7%) in females with occupation and the families(72%), the others(11.1%) in females withoup occupation. 3. The members of the families were the spouses(32.5%), the parents or children(32.5%) in men with occupation and the spouses(41.7%), the parents or children(25.0%) in females with occupation and the spouses(69.4%), the parents or children(13.9%) in females without occupation. Conclusions : In our study, the results showed no difference in the fungal infections among males with occupation, females with occupation and females without occupation. Fungal infection of females without occupation was spread in the families and by the pouse among the members of the families

Sequence-Specific Oligonucleotide의 Hybridization방법에 의해 결정된 미토콘드리아 DNA형의 법의학적 유용성

홍성수,고성호,이정주 內務部 國立科學搜査硏究所 1996 國立 科學 搜査 硏究所 年報 Vol.28 No.-