Jung Hwan Oh

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In this paper, we investigate efficient ways of broadcasting data to mobile users over multiple physical channels, which cannot be coalesced into a lesser number of highbandwidth channels. We propose the use of MLMC (MultiLevel Multi-Channel ) Air-Cache which can provide mobile users with data based on their popularity factor. We provide a wide range of(More)
Colonoscopy is the accepted screening method for detection of colorectal cancer or its precursor lesions, colorectal polyps. Indeed, colonoscopy has contributed to a decline in the number of colorectal cancer related deaths. However, not all cancers or large polyps are detected at the time of colonoscopy, and methods to investigate why this occurs are(More)
We present a software system called "Polyp-Alert" to assist the endoscopist find polyps by providing visual feedback during colonoscopy. Polyp-Alert employs our previous edge-cross-section visual features and a rule-based classifier to detect a polyp edge-an edge along the contour of a polyp. The technique employs tracking of detected polyp edge(s) to group(More)
Advances in video technology allow inspection, diagnosis and treatment of the inside of the human body without or with very small scars. Flexible endoscopes are used to inspect the esophagus, stomach, small bowel, colon, and airways, whereas rigid endoscopes are used for a variety of minimal invasive surgeries (i.e., laparoscopy, arthroscopy, endoscopic(More)
We present in this paper a fully automatic content-based approach to organizing and indexing video data. Our methodology involves three steps:<ul><li>Step 1: We segment each video into shots using a Camera-Tracking technique. This process also extracts the feature vector for each shot, which consists of two statistical variances <i>Var<sup>BA</sup></i> and(More)
The in vivo reconstruction of conjunctiva was investigated by using modified poly(lactide-co-glycolide) (PLGA) 50/50 scaffolds. The porous PLGA matrices were prepared by a solvent-casting particulate-leaching method with NaCl, then modified with collagen, hyaluronic acid (HA) or/and human amniotic membrane (AM) component. The growth of corneal epithelial(More)
Inflammatory pseudotumor (IPT) is a rare benign nonneoplastic lesion. The exact etiology of IPT remains unclear. Inflammatory pseudotumor in the maxillofacial region is exceptionally rare, and it is often mistaken for a malignancy. The diagnosis is still difficult and is based on the histological examination of the lesions composed of 3 types of(More)
BACKGROUND/AIMS Quality of life (QoL) is consistently decreased in gastroesophageal reflux disease (GERD), but the relationship between QoL and psychological factors in GERD has not yet been clearly defined. The present study investigated the relationship between the psychological factors of two subtypes of GERD and QoL. METHODS A cohort of 769(More)
We extend our previous work [1] of the general framework for video data mining to further address the issue such as how to mine video data, in other words, how to extract previously unknown knowledge and detect interesting patterns. In our previous work, we have developed how to segment the incoming raw video stream into meaningful pieces, and how to(More)
Advances in video technology are being incorporated into today's healthcare practices. Colonoscopy is regarded as one of the most important diagnostic tools for colorectal cancer. Indeed, colonoscopy has contributed to a decline in the number of colorectal-cancer-related deaths. Although colonoscopy has become the preferred screening modality for prevention(More)