Dae-Hwan Kang

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BACKGROUND Hedgehog signaling plays critical roles during embryonic development. It is also involved in tissue regeneration and carcinogenesis in various adult tissues. Moreover, it regulates the maintenance of cancer stem cells and adult stem cells. Although hedgehog signaling is important in gastric carcinogenesis, its role in gastric regeneration has not(More)
We experienced a case of intussusception caused by cys- tic lymphangioma of the colon in a 32 years old female who was admitted to our hospital for the chief complaint of bloody stool. In the colonoscopic examination, cystic mass with stalk which had smooth mucosal surface was noted at the descending colon. Abdominal ultrasonography and computed tomography(More)
Fluctuations ͑or drifts͒ in switching voltages such as programming set/reset voltages and threshold voltage pose serious obstacles to the reliable operation of electrical phase change memory devices. Using a phase change memory device having a GeSb 2 Te 4 phase change material and TiN electrode, these fluctuations are demonstrated to result from device(More)
In this study, porous sodium hyaluronic acid/sodium alginate (HA/SA) scaffold based on interpenetrating polymeric network (IPN) technique has been fabricated, where HA and SA were cross-linked with poly(ethylene glycol) diglycidyl ether (PEGDG) and calcium chloride, respectively. The mean pore size and the swelling ratio of fabricated scaffolds decreased,(More)
Misoprostol is reported to prevent non-steroidal anti-inflammatory drug (NSAID)-associated gastroduodenal complications. There is, however, limited information regarding the efficacy of DA-9601 in this context. We performed a comparative study on the relative efficacy of DA-9601 and misoprostol for prevention of NSAID-associated complications. In this(More)
BACKGROUND Reflux esophagitis is inversely associated with the presence of atrophic gastritis, and endoscopic grading of atrophic gastritis correlates with histological evaluation. The aim of this study was to investigate the association of the endoscopic grade of atrophic gastritis with gastroesophageal and gastropharyngeal reflux. METHODS A total of 627(More)
We emulate the spike-timing dependent plasticity (STDP) behavior of biological synapse in two phase change memory (2-PCM) cells with 3x nm technology, which has been considered as a formulated Hebbian learning rule of our cognition, learning and memory abilities. Various STDP behaviors are successfully realized in 2-PCM synapse by varying the interval of(More)