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변종훈,서동수,최영민,장현주,공기정,이정오,류병환,Byun, Jong-Hoon,Seo, Dong-Soo,Choi, Yuungmin,Chang, Hyunju,Kong, Ki-Jeong,Lee, Jung-O,Ryu, Beyong-Hwan 한국세라믹학회 2004 한국세라믹학회지 Vol.41 No.10
입자크기가 수 nm인 고농도 은 나노 졸을 이용하여 잉크젯 기법으로 은 미세라인을 형성하고자 하였다. 고분자전해질을 사용하여 합성한 $10wt\%$ 농도의 은 나노 졸의 입자크기는 10nm 이하였으며, 은 나노 졸을 이용한 미세 라인의 인쇄특성은 은 나노 졸의 접촉각에 매우 깊은 관계를 갖고 있었다. 순수한 ITO 기판에서 은 나노 졸은 높은 접촉각을 나타내었으며, dot 형상이 나타났다. 그러나 100ppm의 Polyethylenimine(PEI)을 코팅한 ITO 기판은 젖음성이 크게 개선되었으며, 잉크젯 기법을 이용하여 $60\~100{\mu}m$의 선폭을 갖는 은 나노 졸의 미세라인 형성이 가능함을 확인할 수 있었다. We have studied the fabrication of silver micro lines using the silver nano sol on ITO substrate by an ink-jet method. The average particles size of $10wt\%$ silver nano sol synthesized with polyelectrolytes was smaller than 10 nm. The pattern formation of silver nano sol on the substrate closely related with the contact angle of the silver nano sol. The dot shaped of silver nano sol on bare ITO substrate was formed due to the high contact angle of silver nano sol. When ITO substrates was treated with 100 ppm polyethylenimine for silver nano sol patterning, fine silver micro lines of $60{\sim}100{\mu}m$ width was fabricated by ink-jet method.
변종훈 ( Byeon Jong Hun ),우미옥 ( Woo Mi Ock ) 대한미용학회(구 대한미용과학회) 2021 대한미용학회지 Vol.17 No.1
The present study aimed to examine the effects of SNS information quality on barbershop selection attributes, and to this end, a survey was conducted targeting men in the age range 10-50yrs who have experience in using a barbershop. For statistical analysis, SPSS 23.0 and Jamovi 1.1.9.0 programs were applied, whereas for reliability test, Cronbach's α coefficient was used. To check correlation between the variables, both Pearson’s correlation and multiple regression analyses were executed. Results, with respect to demographic characteristics, revealed that the highest percentage was shown by the subjects in the age range 20-30 yrs, the unmarried with respect to marital status, and graduation from university in regard to academic background. Next, SNS information quality showed significant effects on the usefulness and informativity. Furthermore, the SNS information quality also had effects on the reliability and interactivity. To conclude, when the usefulness and informativity are higher, the human factor also becomes higher. When the reliability and interactivity are higher, the image factor becomes higher. Therefore, the barbershop operators should have some strategies to emotionally approach their customers along with fully reflecting the items to be more highlighted.
홍태희,변종훈,유병하,황상원,김한용,박재홍 대한흉부외과학회 2015 Journal of Chest Surgery (J Chest Surg) Vol.48 No.3
Venoarterial extracorporeal membrane oxygenation (VA ECMO) is widely used in patients with cardiogenic shock. Insufficient decompression of the left ventricle (LV) is considered a major factor preventing adequate LV recovery. A 40-year-old male was diagnosed with acute myocardial infarction, and revascularization was performed using percutaneous stenting. However, cardiogenic shock occurred, and VA ECMO was initiated. Severe LV failure developed, and percutaneous transaortic catheter venting (TACV) was incorporated into the venous circuit of VA ECMO under transthoracic echocardiography guidance. The patient was successfully weaned from VA ECMO. Percutaneous TACV is an effective, relatively noninvasive, and rapid method of LV decompression in patients undergoing VA ECMO.
Hourglsaa 형 담낭에 발생한 석희유 담즙 1 예
두창준,변종훈,신현자,송국진,전인석,김웅봉,최병수 대한내과학회 1988 대한내과학회지 Vol.35 No.4
Milk of calcium bile or limy bile is a rare condition in which the gallbladder is filled with a thick, pastelike, radiopaque material. It is almost entirely composed of calcium carbonate. The mechanism by which bile turns into limy bile is not well understood, Hewever, complete cystic duct obstruction by gallstones is believed to be a prerequisite for the development of limy bile. Hourglass gallbladder is a deformity of the gallbladder with a constriction or midtransverse septum between the infundibulum and body. Stasis proximal to the constriction probably contributes to calculous formation and may provoke cancerous alternations. This is the account of a case of Hourglass gallbladder associated with limy bile at the fundal compartment in a 43-year-old man who had vague abdominal pain in the right upper quadrant and indigestion for two years. The literature on this subject is briefly reviewed.
김명환,신규석,변종훈,두창준,소군호,고정석,진교현,김서종 대한소화기내시경학회 2000 Clinical Endoscopy Vol.20 No.2
A choledochal cyst is relatively rare lesion in the biliary system, and a carcinoma arising from such a cyst is rarely reported. Until now, a case of a hepatocellular carcinoma combined with a choledochal cyst had not been reported. A 45-year-old woman was recently admitted due to abdominal pain. An abdominal computed tomography revealed a 5 cm-sized low attenuative mass involving the right anterior and left medial segment of the liver and gallbladder fossa. An endoscopic retrograde cholangiopancreatogram showed fusiform dilatation of the common bile duct, but anomalous union of pancreaticobiliary duct was not observed. Fine-needle aspiration of the liver was conducted and yielded a hepatocellular carcinoma. On celiac arteriography, a hypervascular hepatic mass was also found. Transarterial chemoembolization was performed. It is believed this may be the first case of a choledochal cyst combined with a hepatocellular carcinoma in the literature. Hence, this case is herein reported with a review of related literatures.
김지호,방제소,변종훈,양수현,김성훈,장지선,김윤정 대한소화기내시경학회 2010 Clinical Endoscopy Vol.41 No.1
Lymphoid polyp is a very rare disease that commonly occurs in the rectum. It is a benign, focal or diffuse lesion that typically occurs where clusters of lymphoid follicles are present. The polyp is composed of well differentiated lymphoid tissue. It can generally be differentiated from malignant lymphoma by the proliferation of normal lymphoid tissue, which has a prominent follicular pattern and a clearly defined germinal center. There have been only a few reports of lymphoid polyps of the rectum, and there have been no reports of lymphoid polyp in the ampulla of Vater. We experienced a case of lymphoid polyp in the ampulla of Vater associated with tubulopapillary adenoma, and the patient first presented with jaundice, weight loss and general weakness. 림프용종은 림프 조직이 국소적 또는 미만성으로 증식하여 발생하는 양성질환으로, 림프구 증식(lymphoid hyperplasia) 혹은 양성 림프종이라고 불리기도 한다. 잘 분화된 림프구로 구성되어 있으며, 선명한 배중심과 난포 패턴을 보이는 정상적인 림프 조직의 증식에 의해서 악성 림프종과 구분할 수 있다. 소아에서 상대적으로 흔하게 발생하고 성인에서는 직장에 드물게 발생한다. 저자들은 황달, 체중감소, 전신 쇠약감 등의 증상으로 발현된 바터팽대부의 종양을 내시경 유두 절제술을 시행하여 대롱유두샘종과 병발한 림프용종으로 진단한 1예를 경험하여 문헌고찰과 함께 보고한다.