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나이트 비젼을 위한 최적의 근 적외선 카메라에 대한 연구
전대홍(Dae Hong Jeon),기민관(Min Kwan Kim),손수락(Su Rak Shon) 한국자동차공학회 2008 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Night Vision is the one of technique of Pre-Crash Safety to prevent the Crash by pre-noticing to driver in the night. near-Infrared lamp and camera are necessary to give the best quality of the Night Vision, and the biggest problem of the system. which obtains the visuals by the camera in the night, is the equal light noise with the front light system. Light noise will show the light from the oncoming vehicle to the light blooming in the real camera vision. This paper will discuss about the cause and solution of light blooming of near- infrared camera, which is the important issue of night vision. Finally, we defined the optimized near- infrared camera by the lise of solution we came with.
Case Report : Renal Pelvic Hematoma Induced by Delayed Re-bleeding After Renal Biopsy
박동준 ( Dong Jun Park ),전대홍 ( Dae Hong Jeon ),서종우 ( Jong Woo Seo ),강여진 ( Yeo Jin Kang ),이동원 ( Dong Woo Lee ),이현정 ( Hyeon Jeong Lee ),김현정 ( Hyun Jung Kim ),장세호 ( Se Ho Chang ) 대한신장학회 2010 Kidney Research and Clinical Practice Vol.29 No.6
Purpose: Renal biopsy is a useful method for the diagnosis of kidney disease. Complications may occur and are usually associated with bleeding. However, delayed recurrent bleeding is so rare. We report a case of renal pelvic hematoma and hydronephrosis occurred by delayed re-bleeding after percutaneous needle renal biopsy. A 42-year-old woman was admitted to our institution via emergency room with gross hematuria and left flank pain, which had started on that day. Renal biopsy had been done 8 days earlier. Computed tomography (CT) angiography revealed left hydronephrosis caused by pelvic hematoma and we observed bloody urine in the left ureteral orifice on cystoscopy. Hydration, diuresis and double J stent insertion restored hydronephrosis and hematuria was disappeared. Even though renal pelvic hematoma by delayed bleeding occurs rarely after percutaneous needle kidney biopsy, we should consider this complication when delayed recurrent gross hematuria occurs after kidney biopsy.
혈액투석을 위한 이중도관 삽입 후 생긴 가성동맥류의 치료
황재진 ( Jae Jin Hwang ),김완수 ( Wan Soo Kim ),전대홍 ( Dae Hong Jeon ),강여진 ( Yeo Jin Kang ),박동준 ( Dong Jun Park ),장세호 ( Se Ho Chang ),신태범 ( Tae Bum Shin ),김현정 ( Hyun Jung Kim ) 대한신장학회 2010 Kidney Research and Clinical Practice Vol.29 No.5
In patients with end-stage renal disease, cannulation of the central venous system with large-bore dual-lumen catheters is often necessary until a functioning vascular access can be created. However, the technique of placing a dual-lumen catheter can make complication. The right internal jugular vein is the preferred site of hemodialysis catheter placement because its complication rate was lower compared with the subclavian and left internal jugular veins. Common complications include severe bleeding, hematoma formation, pneumothorax and hemothorax, atrial or ventricular arrhythmias, malposition of the catheter, air embolism, secondary infections, and intraarterial placement of the catheter. We report an unusual case of pseudoaneurysm of the superior thyroidal artery complicating an attempt of internal jugular-vein catheterization which was successfully treated by endovascular coil embolization.
레이노현상으로 발현하여 무작위 관자동맥 생검으로 진단된 비전형적 거대세포동맥염
서정우 ( Jong Woo Seo ),허지안 ( Ji An Hur ),김현옥 ( Hyun Ok Kim ),전대홍 ( Dae Hong Jeon ),백종하 ( Jong Ha Back ),김재희 ( Jae Hee Kim ),이상일 ( Sang Il Lee ) 대한류마티스학회 2010 대한류마티스학회지 Vol.17 No.3
Giant cell arteritis (GCA) is a chronic vasculitis that mainly involves the cranial branches of arteries, and typically it presents with a cephalic sign such as a new headache, jaw claudication and/or visual symptoms. Although the tender, swollen or beaded arteries are adequate sites for biopsy, random temporal artery biopsy should be performed in all the patients suspected of suffering with GCA and even if cephalic signs are not present. Several cases of typical GCA have been reported in Korea, but so far there have been no reports of an atypical case presenting with Raynaud`s phenomenon, and the patient was diagnosed by random temporal artery biopsy. Here we describe a case that showed the typical pathological findings of GCA in an asymptomatic temporal artery. The patient complained of only Raynaud`s phnomenon and the patient was without any cephalic symptoms.
류마티스관절염으로 오인된 Mycobacterium Marinum 감염에 의한 다발성 관절염
김현옥 ( Hyun Ok Kim ),배인규 ( In Gyu Bae ),허상택 ( Sang Taek Heo ),나재범 ( Jae Boem Na ),김재희 ( Jae Hee Kim ),강민규 ( Min Gyu Kang ),전대홍 ( Dae Hong Jeon ),김나영 ( Na Young Kim ),이상일 ( Sang Il Lee ) 대한류마티스학회 2010 대한류마티스학회지 Vol.17 No.2
Mycobacterium marinum (M. marinum) is a nontuberculosis mycobacterium that is normally associated with cutaneous lesions. Most cases occur after an individual has suffered minor trauma in association with contaminated fresh or salt water. In immunocompromised patients, M. marinum can cause osteomyelitis, synovitis and/or disseminated infection, which can be mistaken for rheumatoid arthritis (RA) or remitting seronegative symmetrical synovitis with pitting edema (RS3PE). Therefore, precise history taking and specimen culture are very important for early diagnosis and appropriate treatment. We report an unusual case of septic polyarthritis due to M. marinum that was diagnosed by culture and improved with antibiotic therapy.
전대홍,김영호,강대성 동아대학교 정보기술연구소 2002 情報技術硏究所論文誌 Vol.9 No.2
This paper proposes the mean value comparison algorithm(Mean Value Comparative Algorithm) for MPEG video segmentation. Shot detection that segments MPEG video sequence is important work and first step for video index and retrieval as being most basic. Usually, segmentation algorithm used much has a defect that occurs a error detection according to screen change of camera lights' flash etc. or fast movement of body or movement of camera, because of comparing former frame with present frame. Therefore I appropriated Shot point that detects at traditional algorithm and distinguished once more through comparing its mean value with abutting frames in this paper. I could detect more corrective shot than traditional algorithm by experiment result.
Video Stream의 명암도 변화와 고유성분 분석을 이용한 내용기반 비디오 검색
전대홍,강대성 동아대학교 정보기술연구소 2002 情報技術硏究所論文誌 Vol.10 No.1
In this paper, we proposed a content-based video retrieval using eigen value of key frame and intensity component. We divided the video stream into many shots to extra key frame representing each shot, and get the intensity distribution of the shot from the database generated by using ECA. The generated codebook, their index value for each key frame, and the intensity values were used for database. The query image is utilized to find video stream that has the most similar frame by using the euclidean distance measure among the code words in the codebook. The experiment results show that the proposed algorithm is superior to any other in the retrieval outcome since it makes use of eigen value and intensity elements, and reduces the processing time etc.