• 대한관절경학회지
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• 제2권2호
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• pp.155-158
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• 1998

The purpose of this study is to evaluate the cause, size, number, nature and locaton of loose bodies in the knee joint and to describe the proper arthroscopic technique to remae the loose bodies according to the location of them. We retrospectively analysed thirty-three operations of arthroscopic removal of loose bodies from the knee. Eleven males and 22 females were included with average age of 38(range 7-71). Total number of removed loose bodies were more than sixty. The loose bodies were found most commonly at anterior intercondylar notch area. The most common associated pathology was degenerative arthritis. The most common size of loose bodies was in the range of 5mm to 10mm in diameter. The most common nature of loose bodies was osteochondral. The loose bodies located in suprapatellar pouch, medial gutter, lateral gutter. anterior intercondylar notch or posterior intercondylar notch were removed using standard portals such as anteromedial, anterolateral, superomedial and posteromedial portals. The removal of loose bodies located in upper portion of posteromedial or posterolateral compartment were greatly enhanced using posterior trans-septal portal. The proper portals for the visualization and removal of loose bodies were identified according to the location of loose bodies in the knee joint. More skill in the use of the arthroscope is required for the removal of loose bodies than for simple diagnostic arthroscopy.

• 한국의학물리학회지:의학물리
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• 제12권2호
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• pp.177-184
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• 2001

방사선 치료목표는 정해진 방사선량을 병변부위에 정확하게 조사시키고 주위 정상조직에는 방사선이 조사되지 알도록 하는 것이다. 이때에 조사야 배치, 차폐체 배치의 부정확성, 환자의 움직임 등으로 병변부위와 치료부위 사이에서 변위오차가 발생할 수 있다. 본 연구에서는 방사선 치료 위치의 확인을 위한 방법으로서 랜드마크를 이용하여 포탈영상과 x선 시뮬레이터 영상을 비교하는 알고리즘을 개발하여 방사선 치료 시 발생하는 부정확도를 이동, 스케일, 회전 정도로 나타내어 정량적으로 확인하였다. 등록 알고리즘은 랜드마크 정합 후 필드 경계 정합에 의해 두 영상의 변위오차를 분석하는 순서로 구현된다. 우선 각 영상의 두개의 랜드마크를 이은 대응선분들을 이용하여 변환변수 (이동, 스케일, 회전)를 구하여 랜드마크를 정합하였다. 다음으로 포탈영상의 필드경계를 추출한 후 $\rho$-$\theta$ technique을 적용하여 두 필드의 변위오차를 계산하였다. 팬톰 포탈영상에 적용하여 이동에서 2mm 이내, 회전에서 1$^{\circ}$ 이내, 스케일에서 1% 이내의 오차를 보였다. 본 연구의 결과를 통하여 방사선 치료 시 시뮬레이터 영상과 포탈영상을 정량적으로 분석함으로서, 환자 치료의 정확도 확인 연구에 기여할 수 있을 것으로 사료된다.

• 한국인터넷방송통신학회논문지
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• 제22권6호
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• pp.63-68
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• 2022

현재 대한민국의 서울특별시를 기준으로 응급실은 총 68개가 있으며, 응급실의 위치를 조회할 수 있는 포털 사이트가 존재하지만, 구와 자치동을 선택하는 방법으로 구성되어 실제 응급 상황에서는 활용하기가 어렵다. 또한, 119 구조대를 요청하고, 기다리는 상황에서 생존에 필요한 골든타임을 놓칠 수 있기 때문에 직접 응급실로 이동하는 방안이 더 효율적일 수도 있다. 따라서 본 논문에서는 MongoDB에서 지원되는 다양한 기능을 통해 특정 위치를 기준으로 빠르게 응급실의 위치를 조회할 수 있는 서비스를 제안한다. 서울특별시를 기준으로 응급실 위치 데이터를 다운로드하고, MongoDB에 저장한 후 다양한 처리 기술을 통해 데이터를 처리하고, 공간 인덱스를 적용하여 특정 위치에서 거리를 기준으로 응급실을 실시간으로 조회할 수 있다.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2016년도 추계학술대회
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• pp.561-564
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• 2016

지역별로 여성 대상 강력범죄가 빈번하게 일어나는 구역을 표시해주는 범죄 지도를 이용한다면 경찰은 범죄가 빈번하게 발생하는 지역을 집중적으로 관리하여 범죄를 예방할 수 있고, 개인은 범죄지역 정보를 참조하여 심각한 문제가 개인에게 발생하는 것을 피할 수 있다. 본 연구에서는 공공 데이터 포털에 공개된 여성 대상 범죄 데이터와 범죄자 데이터를 분석하여 지역별 위험도를 계산하고 개인의 연령대와 위치 등을 고려하여 맞춤형 위험 정보를 제공하는 범죄 예방 시스템을 제안한다. 성범죄가 일어난 지역에 대해서는 공공 데이터 포털에서 제공되는 범죄자 데이터를 크롤링하여 데이터를 수집한다. 성범죄가 일어난 지역에 대해서 범죄 통계 정보를 바탕으로 범죄 내용, 범죄자의 실제 거주지, 범죄 발생 지역, 형량, 범죄 횟수를 기반으로 범죄 위험도를 계산하고 해당 지역에 나타나는 위험 등급 정보를 기반으로 연령대별 범죄 발생 구역을 시각화한다. 시 군 구(동) 단위별로 계산된 지역별 위험도 점수는 GIS(Geographic Information System)와 연계하여 사용자의 위치와 연령대에 맞는 범죄 위험 정보로 제공된다.

• 디지털융복합연구
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• 제9권2호
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• pp.131-140
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• 2011

최근 무선 통신 기술과 반도체 설계 및 공정 기술의 비약적인 발전으로 기존 데스크톱 컴퓨팅 환경은 급속히 테블렛 PC와 스마트 폰 기반의 모바일 환경으로 이동하고 있다. 특히 스마트 폰의 확산은 증강현실 기술을 이용한 사용자 인터페이스의 위치기반 서비스 응용분야를 확대시키고 있다. 이에 본 논문에서는 안드로이드 기반의 OpenAPI를 이용한 증강현실 시스템을 구현하였으며, 동시에 다양한 실시간 사용자의 정보를 이용 가능하도록 위치기반 소셜네트워크 서비스도 OpenAPI를 이용하여 통합 구현하였다. 구현에 이용된 다양한 OpenAPI들은 개발자가 포털 사이트의 방대한 정보에 쉽게 접근하여 어플리케이션을 개발하도록 지원한다. 제안 시스템은 프로토타입으로 구현되어 스카이사의 시리우스 안드로이드 폰에 동작시킴으로 모바일 기기에서도 증강현실을 이용한 위치기반서비스의 가능성을 보여주었다. 또한 사용자의 실시간 사진, 동영상, 메시지 데이터들의 공유가 가능하도록 소셜네트워크 서비스도 효율적으로 연동시켰다.

• Asia pacific journal of information systems
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• 제22권4호
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• pp.125-149
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• 2012

As the smart phone is propagating rapidly, the importance of mobile advertisement has also grown. One of the main characteristics of the Internet and smart phone advertising is that they can deliver personalized advertisements to each customer. The smart phone enables the identification of additional personalized information such as the customer's location and the accessibility to the site at any place any time. As the Internet platform becomes richer, firms that offer the ad services via the wired PC Internet and wireless smart phone are seeking various types of personalized ads. However, their service platform and Information and Communication Technology (ICT) platform should be suitable to the characteristics of personalized ads. This research explores various types of personalized ad methods and evaluates their adequacy encompassing four types of ad service platforms (such as search portal, news portal, e-mall servers, and SNS) and two types of ICT platforms (PC Internet and smart phone). To this end, we classified the personalized ads into seven types: three basic types and four composite types. The basic types of ad methods are identified by considering the current activity that the customer is engaged, the individual profile and log history, and the customer's current location or planning location. Four composite types of ad methods are constructed as the combination of these basic types. For those types of ad methods, we evaluate whether each ad method adequately maps with four types of ad service platforms and two types of ICT platforms. We proposed a metric of evaluation and demonstrated the concept with illustrative numbers. Specifically, we analyze and compare personalized ad methods in three ways. Firstly, the possibility of implementing a personalized ad method on the platform is analyzed to confirm the degree of suitability. Secondly, the value of personalized ad method is analyzed based on the customer accessibility. Lastly, expected effectiveness for each personalized ad method is computed by multiplying the possibility and the value. Through this kind of analysis, the ad service providers as well as advertising companies can evaluate what kinds of personalized ad methods and platforms are possible and suitable to maximize their ad effectiveness on the Internet and smart phone platforms.

• 한국임상수의학회지
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• 제24권3호
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• pp.461-466
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• 2007

Two dogs were admitted with a history of anorexia, ataxia, shivering, lethargy, hypersalivation and seizure. Patients were suspected for portosystemic shunts on the basis of clinical signs, increased hepatic serum profiles on the blood test, microhepatica on plain abdominal radiographs, and an abnormally dilated and tortuous vessel on abdominal ultrasonographs. To diagnose PSS and to further evaluate type, shape, and location of shunt and hepatic vasculatures, the computed tomography (CT) angiography for portal and systemic circulation was performed. The shape, location and pathway of extrahepatic single shunt were confirmed in two dogs. Dual phases (the arterial phase and the venous phase) CT angiography and reformatted and three-dimensional images offered good understanding of PSS and planning surgical treatment.

• 한국멀티미디어학회논문지
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• 제19권12호
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• pp.1960-1969
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• 2016

In this paper, we propose an automatic hierarchical organ segmentation method on abdominal CT images. First, similar atlases are selected using bone-based similarity registration and similarity of liver, kidney, and pancreas area. Second, each abdominal organ is roughly segmented using image-based similarity registration and intensity-based locally weighted voting. Finally, the segmented abdominal organ is refined using mask-based affine registration and intensity-based locally weighted voting. Especially, gallbladder and pancreas are hierarchically refined using location information of neighbor organs such as liver, left kidney and spleen. Our method was tested on a dataset of 12 portal-venous phase CT data. The average DSC of total organs was $90.47{\pm}1.70%$. Our method can be used for patient-specific abdominal organ segmentation for rehearsal of laparoscopic surgery.

• 복식문화연구
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• 제12권5호
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• pp.691-701
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• 2004

The first purpose of this study was to compare the factors of information searching before purchasing with the factors of information offering after purchasing of the products, which were communication contents about the wedding Hanbok in internet communities. The second purpose was to propose marketing strategies for internet wedding Hanbok marketer. To accomplish the goal, the content analysis method which considered references and opinions of internet community members was used. Two hundred cases from WEDDING CLUB(62,893members), WEDDING GONGBU (18,649members), and WEDDING DOUMI (17,326members) in Daum internet portal site were selected from August 1 to September 21, 2003. The results were as follows: First, the information factors which were considered seriously when consumers purchased wedding Hanbok, were design, the level of sewing, price, store location, cognitive power, service level, and manufacturing time. Second, the consumers considered the price as the most important factor when they searched internet information. Third, the service factor was also considered importantly, and it was recognized important factor so much after purchasing as before purchasing wedding Hanbok. Fourth, the factors such as cognitive power, manufacturing time and store location were seriously considered as the information searching factors before purchasing. It showed higher rate when compared with information offering factors of after purchasing the wedding Hanbok. Fifth, the factor of sewing was considered as lower rate than other factors. It showed similar results before and after purchasing the wedding Hanbok.

• 한국임상수의학회지
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• 제20권4호
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• pp.508-515
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• 2003

A 4-month-old 5.7 kg male Golden retriever with history of seizure, depression, lethargy and anorexia was referred to Veterinary Medical Teaching Hospital, Chungbuk National University. Hematologic examination revealed microcytosis and nonregenerative anemia. Serum chemical values showed increased serum ammonia (423 $\mu$mol/L), ALP (1101 U/L), r-GTP (13.9 U/L) and CPK (1454 U/L), and decreased total protein (4.9 g/dl) and BUN (1.6 mg/dl). Microhepatia was shown in survey abdominal radiographs. Color doppler ultrasonographic examination revealed dilated tortuous vein with turbulent flow within liver parenchyma. Intraoperative jejunoportography and intraoperative ultrasonography confirmed the location and size of single intrahepatic shunt vessel in the left medial liver lobe. Also, the anomalous vessel entering the caudal vena cava was identified beneath the diaphragm. The shunting vessel was ligated with using an Ameroid constrictor. General conditions, hematologic and serum chemical values resolved gradually after surgery. One month after surgery abdominal radiograph showed normal gastric axis and it was consistent whit the normal size liver. Normal echogenecity of liver and enlargement of portal vein were shown in ultrasonography. It is assumed that survey radiography and ultrasonography are useful for diagnosis of single intrahepatic shunt in a dog and especially jejunoportography vein portography and intraoperative ultrasonography are suitable for confirmation of the anatomic location and size of the shunting vessels.