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기포부상분리법에 의한 Cu(Ⅱ)의 제거에 있어서 유동특성에 관한 연구
김현수,박주량,이승무 연세대학교 산업기술연구소 1985 논문집 Vol.17 No.1
This investigation was carried out to study the dynamic characteristics of the removal of Cu(II) from wastewater by the technique of foam fractionation, using sodium-dodecylbenzenesulfornate (DBS) as a foaming agent. The surface excess concentration of Cu(II) with the change of DBS concentration in feed solution and superficial gas velocity was obtained by measuring foam diameter. The value of HTU with the change of DBS concentration and superficial gas velocity was determing by measuring superficial liquid velocity. The experimental results are obtained as follows: 1. When Cu(II) concentration in feed solution is constant, the surface excess concentration of Cu(II) increased as DBS concentration increased. But decreased as superficial gas velocity increased. 2. Equilibrium constant (Tcu/Cw) between the surface excess concentration of foam and the concentration of interstitial liquid increased as DBS concentration in feed solution increased. However it was not affected by the change of superficial gas velocity. 3. For the superficial gas velocity above 10cm/min, the empirical equation was derived as follows: HTU = 2 exp [0.642(??) - 0.19(??)] where, C??(DBS) denotes the DBS concentration in feed solution, and v is the superficial gas velocity.
Management of Blood Loss in Hip Arthroplasty: Korean Hip Society Current Consensus
( Joo-hyoun Song ),( Jang Won Park ),( Young-kyun Lee ),( In-sung Kim ),( Jae-hwi Nho ),( Kyung-jae Lee ),( Kwan Kyu Park ),( Yeesuk Kim ),( Jai Hyung Park ),( Seung Beom Han ) 대한고관절학회 2017 Hip and Pelvis Vol.29 No.2
The volume of hip arthroplasty is stiffly increasing because of excellent clinical outcomes, however it has not been shown to decrease the incidence of transfusions due to bleeding related to this surgery. This is an important consideration since there are concerns about the side effects and social costs of transfusions. First, anemia should be assessed at least 30 days before elective hip arthroplasty, and if the subject is diagnosed as having anemia, an additional examination of the cause of the anemia should be carried and steps taken to address the anemia. Available iron treatments for anemia take 7 to 10 days to facilitate erythropoiesis, and preoperative iron supplementation, either oral or intravenous, is recommended. When using oral supplements for iron storage, administer elemental iron 100 mg daily for 2 to 6 weeks before surgery, and calculate the dose using intravenous supplement. Tranexamic acid (TXA) is a synthetic derivative of the lysine component, which reduces blood loss by inhibiting fibrinolysis and clot degradation. TXA is known to be an effective agent for reducing postoperative bleeding and reducing the need for transfusions in primary and revision total hip arthroplasties. Patient blood management has improved the clinical outcome after hip arthroplasty through the introduction and research of various agents, thereby reducing the need for allogeneic blood transfusions and reducing the risk of transfusion-related infections and the duration of hospitalizations.
박주현(Joo Hyoun Park),낭종호(Jong Ho Nang),김경수(Gyung Su Kim),하명환(Myung hwan Ha),정병희(Byung Hee Jung) 한국정보과학회 2003 정보과학회논문지 : 시스템 및 이론 Vol.30 No.11·12
효율적인 동영상 검색 방법은 많은 양의 동영상 데이터를 관리하는 디지털 비디오 라이브러리 시스템에서 필수적으로 요구되는 기능이다. 본 논문에서는 샷 단위 동영상을 문맥, 전경, 배경, 오디오로 나누어 비교하여 질의 동영상과 비슷한 동영상을 찾아내는 예제 기반 동영상 검색 알고리즘을 제안하였고, 제안한 알고리즘에 따라서 저작 및 검색도구를 구현하였다. 샷간의 관계 정보 즉, 문맥을 고려한다는 것은 인접한 샷들 간의 오디오, 움직임 정보들과 같은 저급 수준 내용 정보 간에 변화 패턴을 비교한다는 것이다. 두 번째 비교 요소인 전경은 움직이는 객체들의 집합을 의미하고, 세 번째 비교 요소인 배경은 전경을 제외한 나머지 비디오 정보를 의미한다. 이러한 비교 방법은 동영상 제작 과정에 근거한 것으로써 사용자로 하여금 직관적인 비교를 할 수 있게 한다. 또한 질의 신을 직접 구성할 수 있게 하였고, 각각의 비교요소에 가중치를 부여할 수 있도록 하여서 사용자의 검색의도를 자유롭게 반영할 수 있도록 하였다. 본 논문에서는 동영상이 가지고 있는 의미 정보를 검색에 완전히 반영하지는 못하지만, 문맥을 통해서 부분적인 의미 정보를 사용할 수 있도록 하였으며, 질의 신 구성과 직관적인 비교 요소를 사용함으로써 사용자의 검색 의도를 최대한 반영하고자 하였다. Digital Video Library System which manages a large amount of multimedia information requires efficient and effective retrieval methods. In this paper, we propose and implement a new video search and retrieval algorithm that compares the query video shot with the video shots in the archives in terms of foreground object, background image, audio, and its context. The foreground object is the region of the video image that has been changed in the successive frames of the shot, the background image is the remaining region of the video image, and the context is the relationship between the low-level features of the adjacent shots. Comparing these features is a result of reflecting the process of filming a moving picture, and it helps the user to submit a query focused on the desired features of the target video clips easily by adjusting their weights in the comparing process. Although the proposed search and retrieval algorithm could not totally reflect the high level semantics of the submitted query video, it tries to reflect the users' requirements as much as possible by considering the context of video clips and by adjusting its weight in the comparing process.
박재철(Jae-Cheol Park),김성윤(Sung-Yoon Kim),박재현(Jae-Hyoun Park),최주형(Joo-Hyoung Choi),김정환(Jeong-Hwan Park),전철균(Chul-Kyun Chun) 한국마린엔지니어링학회 2010 한국마린엔지니어링학회 학술대회 논문집 Vol.2010 No.10
To investigate the pinwheel type's wing is suitable for wind power turbine of a compact horizontal axis, We tried to perform data processing interpretation and review pinwheel's fluid characteristic. The pinwheel's perimeter inside fluid is divided into floor and superior. The fluid which is from side wing in floor vicinity proceeded toward wing tip. Seeing the axis of rotation in the inside of pinwheel's bulge at the fluid superio. It made vortex by itself counterclockwise. The air current which runs into pinwheel was dashed against floor and was converted like shape of the surface of a wall jet. Some portions flowed into side wing, some portions dispersed along the wing's open side.
박병채,한병훈,김현주,김진,이병건 대한소화기내시경학회 1996 Clinical Endoscopy Vol.16 No.2
The common bile duct and the duct of Wirsung cojoin at the level of the duodenum, forming the major. papilla of Vater. Existence of a double major papilla, i.e., two neighboring independent papillary structure, is infrequent. In our endoscopy unit we have experienced one case of double papilla of Vater wherein canulation of the common bile duct and pancreatic duct could be accom plished through either orifice independently.