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유경미,서우영,서한석,김완수,박재복,황인경 한국조리과학회 2004 한국식품조리과학회지 Vol.20 No.4
The purposes of this study were to investigate the physicochemical characteristics and storage stabilities of various sauces with added Yuza(Citrus Junos). Yuza consisted of three parts: peeled (46.17%), fleshed (43.74%) and seeded (10.09%). Yuza juice revealed 11.33% extraction yield, pH 2.85, 4.18% total acidity, 11° Brix, 1.16% transmittance and 2.63° Brix/acid ratio. Five kinds of sauces with added Yuza juice were Yuza red pepper paste sauce, Yuza soybean sauce for meat, Shahu shabu Yuza sauce, Korean Yuza vegetable sauce and Japanese Yuza soybean sauce. These sauces showed slight changes in pH, total acidity, total bacterial counts and overall sensory characteristics during storage period (60 days). In conclusion, Yuza juice could be applied to various sauces, which remained usable for 60 days.
혼화재 종류 및 친환율에 따른 콘크리트의 염소이온 침투저항성 평가에 관한 연구
유재강,김동석,이상수 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1(구조계)
This research was to investigate the invasion and diffusion properties of chloride ion on the concrete containing mineral admixtures. Mineral admixtures contained in mixes were fly-ash, ground granulated blast-furnace slag, silica fume, and meta-kaolin. For the Rapid Chloride Penetration Test(RCPT), Tang and Nilsson's test method was used to estimate chloride ion diffusion coefficients of that mixes. And the RCPT test results were compared with the penetration depth measured from long-term ponding test with 3.6% sodium chloride solution. As a result, the diffusion coefficient of chloride ion were reduced with the use of mineral admixtures and the compressive strength was related with the diffusion coefficient of chloride ion. The diffusion coefficients from the RCPT and the penetration depth at 91 days of ponding test with the sodium chloride solution have a well established.
류재호,노규태,이영석,이영호,권혁찬,김재석,김효진,이영민,박혜원,박근희 대한조혈모세포이식학회 2002 대한조혈모세포이식학회지 Vol.7 No.1
연구배경: 동일한 환자를 대상으로 조혈모세포이식 전 일반 병실에서의 관해유도 항암제치료 및 강화요법으로 인한 호중구감소 기간의 감염양상과 고용량 항암제치료 후 무균실에서의 조혈모세포이식 시 호중구감소 기간의 감염양상을 중심정맥관 관련 패혈증을 중심으로 비교 연구함으로써 효율적인 감염관리지침을 마련하고자 하였다. 대상 및 방법: 1999년 1월부터 2001년 7월까지 2년 7개월간 동아대학교병원 일반병실에서 악성혈액질환으로 항암제 치료를 받다가 조혈모세포이식을 시행받았던 22명을 대상으로 중심정맥관 관련 패혈증의 형태를 비교분석하였다. 결과: 대상 환자들의 일반병실과 무균실에서의 입원기간은 각각 32±13일, 33±19일, 호중구 감소기간은 15±12일, 17±18일, 호중구 감소기간의 발열 횟수는 14회, 14회로서 입원병실의 종류에 따른 차이는 없었다. 환자들의 중심정맥관 사용일수는 일반병실에서 29일(7~545일), 무균실에서 100.5일(25~606일)이었으며, 총 사용일수는 각각 1,515일, 3,250일로서 무균실에서의 중심정맥관 사용일수가 의미 있게 길었다(P=0.001). 중심정맥관 사용 일수에 대한 감염률은 각각 5.28/1,000일, 3.08/1,000일로서 일반병실에서 그 빈도가 높았으나 통계적 유의성은 보이지 않았다(P=0.141). 결론: 중심정맥관 삽입 후 일반병실에서 항암제 치료를 받던 환자가 조혈모세포이식을 위하여 무균실에 입원하는 경우, 중심정맥관을 교체하는 것이 감염관리를 위하여 바람직할 것으로 생각된다. Background: We compared the incidence of central venous catheter (CVC) related septicemia during neutropenic period in the same patient, which developed following chemotherapy for remission induction and consolidation, or hematopoietic stem cell transplantation (HSCT). Methods: We retrospectively reviewed the medical records and laboratory data of 22 patients with hematologic malignancies who received anticancer chemotherapy followed by HSCT at Dong-A University Hospital between January, 1999 and July, 2001. We investigated the duration of hospitalization, duration of neutropenic period, duration of catheterization, microbiologically documented organisms and incidence of CVC related septicemia. Results: The data in general ward (before HSCT) and laminar air flow room (after HSCT) were as follows: duration of hospitalization was 32±13 days and 33±19 days, duration of neutropenic period was 15±12 days and 17±18 days, median duration of catheterization was 29 days (7~545 days) and 100.5 days (25~606 days) (P=0.001), and incidence of CVC related septicemia was 5.28/1000 days and 3.08/1000 days, respectively. In the CVC related septicemia, the most common etiologic organism was coagulase negative staphylococcus. Conclusion: We suggest that the exchange of CVC before admission to laminar air flow room could decrease the incidence of CVC related septicemia in HSCT recipients.
Syntactic-Semantics 방법에 신경망을 결합한 온라인 한글 필기체 인식
박두일,조범석,유재휘 명지대학교 공학기술연구소 1993 공학기술연구소 논문집 Vol.8 No.-
This paper presents a cursive on-line handwritten Hangul recognition model which permits cursive writing between graphemes. Add semantics to the basic stroke types possessed by graphemes and expand stroke types. Also, by the design of attribute grammer more accurate feature values will be elicited. The combination of the feature values with genetic algorithm and BP will improve the neural networks model, and this type of learning will increase the recognition rate and reduce the learning time. In this paper, this new on-line handwritten Hangul recognition model is proposed.
설계변경의 경향 및 원인 분석을 통한 설계 품질향상 방안
석성재,김재근,이철우,홍순구,유춘번 한국품질경영학회 2000 품질혁신 Vol.1 No.1
This study is prepared to introduce design quality improvement measures by the trend and cause analysis of design changes which have been made during operations of construction project for power plant. In this study, two types of analysis tool have mainly taken for the use of the improvement measures. One tool is the trend analysis to identify which action should be taken to cut down design changes. This is also useful to monitor whether project participant's endeavour for the action taken is effective or not, to the project performance and design quality improvement. The other is the cause analysis, by using cause and effect diagram, which is useful to identify main causes of the design changes and to establish the measures to reduce recurrence of the design changes.
십이지장 궤양 환자와 만성 위염 환자의 염증 분포의 차이 및 H. pylori 집락도와 염증도의 상관관계
유광하,진춘조,박형석,이재동,김예리,윤성욱,이수인,윤호상 건국대학교 의과학연구소 1998 건국의과학학술지 Vol.8 No.-
An inflammatory difference between the gastric antrum, body and fundus was studied in 39 H.pylroi positive duodenal ulcer and 29 H. pylori chronic gastritis patients. Also we studied correlation of H. pylori colony count and inflammatory severity. Patients with newly diagnosed duodenal ulcer and chronic gastritis were endoscoped and two biopsy secimens each taken from the antrum, body and fundus. Although intestinal metaplasia in antrum and inflammatory activity in fundus were more severe in chronic gastritis patients. another inflammatory difference was equally likely to be found between two groups. There was no definite histological inflammatory difference between duodenal ulcer and chronic gastritis patients. A positive correlation was found between the number of H. pylori and the severity of inflammation.
인공 해수분위기에서 저탄소강의 부식특성에 미치는 합금원소 Cr, Co 및 W의 효과
심재주,유승재,최윤석,김정구,유장용 대한금속재료학회 2003 대한금속·재료학회지 Vol.41 No.12
The aqueous corrosion characteristics of 1% Cr-steel alloyed with small amounts of Co and W, in synthetic seawater was studied by using immersion weight-loss tests, electrochemical corrosion tests (potentiodynamic test and electrochemical impedance spectroscopy (EIS) measurements) and analytical techniques. 1% Cr steels containing Co or W from 0.2 to 0.4 wt.% showed higher corrosion resistance than the 1% Cr steel in the immersion and potentiodynamic tests. EIS measurements showed that the Nyquist plot presented one time constant. Furthermore, the Co- and W-bearing steels present higher Rp values than the 1% Cr steel through all the test period. The better corrosion resistance of the Co-and W-bearing steels is attributed to protectiveness of the surface layer. The corrosion products were examined using electron probe microanalysis (EPMA) and X-ray photoelectron spectroscopy (XPS). The results of EPMA indicated that Cr was concentrated in the inner region of the rust layer, while Co and W were distributed all over the rust layer. XPS results showed that Co existed as a trivalent oxide in the rust layer and W in the rust appeared in the form of a WO₄ compound.