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        • KCI등재후보

          원발성 부갑상선 기능항진증에 대한 임상적 고찰

          송창우,고석환,이길연,이석환,이상목,박호철,홍성화,오수명,윤충,Chang Woo Song,M.D.,Suck Hwan Koh,M.D.,Kil Yeon Lee,M.D.,Suk Hwan Lee,M.D.,Sang Mok Lee,M.D.,Ho Chul Park,M.D.,Sung Hwa Hong,M.D.,Soo Myung Oh,M.D. and Choong Yoon,M 대한갑상선-내분비외과학회 2003 The Koreran journal of Endocrine Surgery Vol.3 No.1

          '스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 7시까지 원문보기가 가능합니다.

          Primary hyperparathyroidism is a rare disease that can be accurately diagnosed and effectively treated in most patients. The diagnosis is established by a persistent elevation of serum calcium and parathyroid hormone and by clinical evaluation. With the introduction of a biochemical screening test for calcium and the development of radiologic techniques, the detection of hyperparathyroidism has increased slightly. However, the parathyroidectomy is still not a common operation in Korea. Twenty-eight patients with primary hyperparathyroidism comprised of 14 males and 14 females, were treated by operation from January 1986 to December 1995 at Kyunghee University Hospital and the data were analyzed retrospectively. The results are as follows: 1) The sex distribution was 14 males & 14 females, and the age distribution was from 14 to 79 years. 2) The clincal manifestations were renal symptoms (42.9%), skeletal symptoms (28.6%), a neck mass (10.7%), pancreatitis (7.1%) , no symptoms (7.1%), polydipsia (3.6%) in order of frequency. 3) Most of the patients showed hypercalcemia above 11mg/dl, but five patients had calcium levels which were either slightly increased or in the upper normal range. 4) The preoperative localization methods were mainly combinations of sonography, C.T.,and Tl-Tc subtraction scans and showed high sensitivity & specificity (above 90%). 5) The main tumor locations were the Rt. lower pole in 10 cases, the Rt. upper pole in 5 cases, the Lt. upper pole in 3 cases, the Lt. lower pole in 7 cases; there were 2 cases of ectopic location and 1 case of hyperplasia at the Rt. upper & the Lt. lower pole. 6) The pathologic findings revealed a solitary adenoma in 25 patients, a carcinoma in two patients, and hyperplasia associated with MEN2a in 1 patient. 7) We experienced one case of recurrence after primary excision at the Rt. lower pole. Reoperation for a missed gland, after the primary operation, was performed in one patient; the excision of the tumor was performed successsfully. 8) We performed surgical excisions and 17 patients showed hypocalcemia postoperatively. Most of the hypocalcemia was transient and disappeared after ingestion of oral calcium agents or usuage of Vit. D3. (Korean J Endocrine Surg 2003;3:15-25)

        • NFC 태그를 이용한 Wi-Fi 접속 기반 모바일 프린팅 시스템

          송창우 ( Chang-woo Song ),김은주 ( Eun-ju Kim ),김선정 ( Sun-jeong Kim ),송창근 ( Chang-geun Song ) 한국정보처리학회 2012 한국정보처리학회 학술대회논문집 Vol.19 No.2

          스마트폰의 빠른 보급과 Wi-Fi 의 대중화로 모바일을 이용한 응용 컨텐츠 개발이 활발하게 진행되고 있다. 본 논문은 공공 장소에서 사용할 수 있는 컨텐츠 기술로 모바일 프린팅 시스템을 개발하였다. 모바일 프린팅 시스템은 NFC 태그가 장착된 시스템으로 Wi-Fi 접속이 가능한 공공의 장소에서 무선 공용 프린터를 바로 이용할 수 있고, Wi-Fi 검색 시간과 비밀번호 입력 단계를 생략하여 태그에 모바일 기기를 접촉하는 것만으로 접속 문제를 해결할 수 있다.

        • 다관절 지렁이 운동을 모사한 직진과 회전이 가능한 소형 모듈 로봇 개발

          송창우(Chang-Woo Song),이상명(Sang Myung Lee),이승엽(Seung-Yop Lee) 대한기계학회 2014 대한기계학회 춘추학술대회 Vol.2014 No.11

          In this study, a biomimetic robot with multi-segmented modules mimicking the locomotion of earthworms was developed. The modular robot consists of five segmented body and each module is actuated by a pair of solenoids with permanent magnet plungers. The biomimetic modular robot can cause the change of direction by making each solenoid pair 180 degrees out of phase to bend the earthworm-like body, as well as the linear locomotion. The theoretical analysis was performed to determine the electromagnetic force driven by each module, and the optimal profiles of input signals were obtained for fast translation and the change of direction. The experiments using the five-segmented robot show that it takes 0.5 s to complete the locomotion over one cycle and the linear speed becomes 27.2 mm/s (0.13 body-length/s). Also, the modular robot completes the turning motion for the change of direction after 90 cycles (t=45 s).

        • 다양한 locomotion이 가능한 초소형 모듈 로봇

          송창우(Chang-Woo SONG),김견우(Kyoun-Woo KIM),서한복(Han-Bok Seo),신부현(Bu-Hyun Shin),이승엽(Seung-Yop Lee) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.11

          In this paper, we propose the design of a micro-module robot enabling various locomotions. And we demonstrate the existence and non-existence of potentialities by using the finite element simulation and solving the inverse dynamics. This micro-module robot cannot only perform both the perpendicular and horizontal locomotions, but also it includes a mechanism to escape dangerous situations, mimicking a Armadillium vulgare themselves which is able to round the its body into a ball shape being protected from predator. The electromagnetic type segmented actuators are used to implement fast moving speed. The characteristics of the module actuators are studied by using FEA, and the feasibility of the proposed locomotion mechanisms are also demonstrated by solving the inverse dynamics.

        • KCI등재

          시맨틱 웹에서 개인화 프로파일을 이용한 콘텐츠 추천 검색 시스템

          송창우(Chang-Woo Song),김종훈(Jong-Hun Kim),정경용(Kyung-Yong Chung),류중경(Joong-Kyung Ryu),이정현(Jung-Hyun Lee) 한국콘텐츠학회 2008 한국콘텐츠학회논문지 Vol.8 No.1

          정보기술의 발전과 인터넷 사용의 증가로 이용가능한 정보들의 양이 폭발적으로 증가한다. 콘텐츠 추천 시스템은 사용자가 원하지 않는 정보를 필터링하고 유용한 정보를 추천하는 서비스를 제공한다. 기존의 추천 시스템은 데이터마이닝 기법으로 웹 접속 기록 및 유형과 사용자가 요구하는 정보를 서비스 제공자 측면에서 분석하여 콘텐츠를 제공한다. 사용자의 선호도와 생활패턴 등의 사용자 측면에서의 정보들의 표현이 어려웠기 때문에 제한된 서비스를 제공할 수 밖에 없었다. 시맨틱 웹 기술은 이미지, 문서 등의 모든 객체를 대상으로 목적에 맞는 정보를 수집, 가공, 응용할 수 있도록 데이터 간에 잘 정의된 의미 있는 관계를 만들 수 있다. 본 논문에서는 시맨틱 웹 환경에서 개인화 프로파일을 동적으로 갱신하여 반영할 수 있는 콘텐츠 추천 검색 시스템을 제안한다. 개인화 프로파일은 프로파일의 특징을 담고 있는 컬렉터, 다양한 컬렉터들로부터 프로파일을 수집하는 수집기, 프로파일 특성에 기반한 고유의 프로파일 컬렉터를 해석하는 해석기로 구성된다. 개인화 모듈은 콘텐츠 추천 서버에서 개인화 프로파일과 주기적으로 동기화할 수 있도록 도와준다. 추천 콘텐츠로 음악을 선택하여 서비스 시나리오에 따라 개인화 프로파일이 콘텐츠 추천 서버에 전달되어 사용자의 선호도와 생활패턴이 반영된 추천리스트를 제공하는지 실험한다. With the advance of information technologies and the spread of Internet use, the volume of usable information is increasing explosively. A content recommendation system provides the services of filtering out information that users do not want and recommending useful information. Existing recommendation systems analyze the records and patterns of Web connection and information demanded by users through data mining techniques and provide contents from the service provider's viewpoint. Because it is hard to express information on the users' side such as users' preference and lifestyle, only limited services can be provided. The semantic Web technology can define meaningful relations among data so that information can be collected, processed and applied according to purpose for all objects including images and documents. The present study proposes a content recommendation search system that can update and reflect personalized profiles dynamically in semantic Web environment. A personalized profile is composed of Collector that contains the characteristics of the profile, Aggregator that collects profile data from various collectors, and Resolver that interprets profile collectors specific to profile characteristic. The personalized module helps the content recommendation server make regular synchronization with the personalized profile. Choosing music as a recommended content, we conduct an experience on whether the personalized profile delivers the content to the content recommendation server according to a service scenario and the server provides a recommendation list reflecting the user's preference and lifestyle.

        • 명도 개선과 Retinex를 이용한 역광 영상의 색 복원

          송창우(Chang Woo Song),정우진(Woo Jin Jeong),문영식(Young Shik Moon) 대한전자공학회 2015 대한전자공학회 학술대회 Vol.2015 No.6

          Because of the light from the back of a subject, a counterlight image has a huge difference of illumination between the light area and the shaded area. In order to enhance the contrast of the counterlight image, Retinex can be used. However, the color distortions occurs when Retinex is applied to a low illumination pixels. We examine the problem of Retinex on the counterlight image, and propose a prepossessing method to apply the Retinex to the counterlight image.

        • 공벌레를 모방한 초소형 이동로봇의 개발

          송창우(Chang-Woo Song),최승욱(Seung-Wook Choi),신부현(Bu Hyun Shin),이승엽(Seung-Yup Lee) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.10

          In this paper, the biomimetic modular robot research that mimics pill bug will be introduced. Pill bug moves by legs and rolls its body when it faces hostile situation. The proposed system was also imitated by the linear motion of earthworm, and in order to escape dangerous situations such as Armadillium vulgare, they themselves are able to round the its body into a ball shape being protected from predator, i.e., in order to passive defense exercise, we use to the split solenoid. The proposed robot has not only a simple structure composed of cores, coils and wires, but it also enables bidirectional actuation and high speed locomotion regardless of friction condition. The optimal input voltage with respect to maximum speed is approved. After the theoretical analysis as to stroke and power, I have verified it using a finite element analysis and experiment.

        • KCI등재

          게잡이 원숭이에 있어 rHuEPO(HM10760)의 단회 투여 후 혈액학 및 혈액생화학적 변화

          김충용(Choong-Yong Kim),이현숙(Hyun-Sook Lee),이필수(Pil-Soo Lee),하창수(Chang-Su Ha),권세창(Se-Chang Kwon),이관순(Gwan Sun Lee),송창우(Chang-Woo Song),한상섭(Sang-Seop Han) 한국독성학회 2006 Toxicological Research Vol.22 No.1

          Changes in hematology and serum biochemistry after treatment of recombinant human erythropoietin (rHuEPO, HM10760) were screened in 4 male cynomolgus monkeys (Macaca fascicularis). Four monkeys, composed of a treatment group of HM10760 and a positive control group of Aranesp<SUP>®</SUP>, were subcutaneously administered at same dose of 100 ㎍/㎏. Both groups did not show any change in body weights and food consumption for 4 weeks compared with those of pretreatment. Both groups did not show any change in total leukocyte count (WBC) and platelet count, while both groups showed increased platelet distribution width (PDW) percentage in HM10760 group during a period from day 5 to day 59 and in Aranesp<SUP>®</SUP> group during a period from day 9 to day 26. Both groups showed increases in red blood cells (RBC), hemoglobin (HGB), and hematocrit (HCT) approximately 10 days after treatment compared with those of pretreatment (day 0). The increased levels of RBC, HGB, and HCT were much higher in HM10760 than in Aranesp<SUP>®</SUP> by the increases of 3.2%~ 12.5% for RBC, 3.8%~17.1% for HCT, and 1.85%~11% for HGB. Both groups showed increases in red cells distribution width (RDW) and reticulocyte (RET) compared with those of pretreatment, showing the highest peak from day 9. The increased level of RET lasted up to day 14 in Aranesp<SUP>®</SUP> group, while it lasted up to day 23 in HM10760 group. The increased level of RDW lasted up to day 59, it was much higher in HM10760 by the increase of 10.1%~17.6% than in Aranesp<SUP>®</SUP> group. In serum biochemistry, both groups showed a decrease in chloride level compared with those of pretreatment. These findings indicated that HM10760 increased RBC, HGB, HCT, RDW, and RET compared with those of pretreatment, and the increased levels were much higher in HM10760 than in Aranesp<SUP>®</SUP>.

        • KCI등재

          RFID 기술을 이용한 시맨틱 웹 기반 스마트 브라우저

          송창우(Chang-Woo Song),이정현(Jung-Hyun Lee) 한국콘텐츠학회 2008 한국콘텐츠학회논문지 Vol.8 No.12

          RFID(Radlo Frequency Identification) 태그에 입력된 데이터는 다양한 산업 분야에서 어플리케이션의 구축에 있어서 비용 절감과 경쟁력 향상을 위해 사용된다. RFID 리더기는 수백 개의 태그에 해당하는 객체들의 식별과 지속적인 탐색을 수행한다. 동적인 연결과 추적의 요청에 따라 객체를 식별할 수 있는 RFID 기술은 정보 인프라를 지원하는 어플리케이션의 컴포넌트로 구성된다. 그러나 원격 RFID 장치 사이에 실시간 데이터 통신 요소들을 고려하지 않은 기존의 어플리케이션은 이기종 간의 연결을 효과적으로 지원할 수 없었다. 또한 서로 다른 네트워크 디바이스가 어플리케이션에 개별적으로 설치되어 각각 쿼리 분석 과정을 거치면서 모니터링의 지연 또는 데이터 변환 과정에서 오류가 발생한다. 본 논문에서는 RFID 태그로부터 추출된 정보를 어플리케이견에 상관없이 통합 관리하기 위하여 시맨틱 웹 환경에서 RFID 데이터베이스 처리 시스템을 구현한다. 어플리케이션에 장착된 RFID 리더기를 통해 사용자의 RFID 태그를 인식하고 데이터를 RFID 데이터베이스 처리 시스템에 전송하면 프로세스가 시맨틱 웹 언어로 정보를 변환한다. 표준화된 시맨틱 웹 기반에서 전송된 데이터는 스마트 브라우저에 의해 해석되어 화면에 출력한다. 시맨틱 웹 언어의 사용은 의미 있는 관계에 대한 추론이 가능하여 추가적인 모듈을 장착하여 기능을 쉽게 확장시킬 수 있다. Data entered into RFID tags are used for saving costs and enhancing competitiveness in the development of applications in various industrial areas. RFID readers perform the identification and search of hundreds of objects, which are tags. RFID technology that identifies objects on request of dynamic linking and tracking is composed of application components supporting information infrastructure. Despite their many advantages, existing applications, which do not consider elements related to real time data communication among remote RFID devices, cannot support connections among heterogeneous devices effectively. As different network devices are installed in applications separately and go through different query analysis processes, there happen the delays of monitoring or errors in data conversion. The present study implements a RFID database handling system in semantic Web environment for integrated management of information extracted from RFID tags regardless of application. Users' RFID tags are identified by a RFID reader mounted on an application, and the data are sent to the RFID database processing system, and then the process converts the information into a semantic Web language. Data transmitted on the standardized semantic Web base are translated by a smart browser and displayed on the screen. The use of a semantic Web language enables reasoning on meaningful relations and this, in turn, makes it easy to expand the functions by adding modules.

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