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운 경험과 손 씻기의 상호작용이 다양성 추구 행동에 미치는 효과
양덕모 ( Deok-mo Yang ),이국희 ( Guk-hee Lee ),이병관 ( Byung-kwan Lee ) 한국감성과학회 2017 감성과학 Vol.20 No.2
Although previous studies have emphasized factors affecting people`s variety-seeking behavior, research has not been performed to examine the interaction effect of good-bad luck and embodied cognition (hand washing) on variety-seeking behavior. Experience of good and bad luck affects consumer information processing and hand washing is known to reverse the experience of luck. Understanding the interaction effect of good/bad luck and hand washing on variety seeking behavior will shed important light on consumer behavior including choice and product purchase. To do this, a study was performed to investigate the effects of good/bad luck priming and hand washing on variety seeking behavior. Participants were primed with good or bad luck and then were asked to either wash their hands or not. After that, they were led to choose yogurt for the next seven days and the dependent measure was the number of different tastes of yogurt participants picked up. An interaction effect of luck priming and hand washing was found. Results indicate that, in good luck condition, there was no difference in variety seeking behavior between hand washing participants and non-hand washing participants. However, in bad luck condition, hand washing participants chose less diverse tastes of yogurt than non-hand washing participants. Implications of the study findings for the field of consumer psychology and marketing are discussed.
Sn-Ag-(Cu)계 Pb-free 솔더 조인트의 고온 크리프 물성 평가
김덕룡(Deok Ryong Kim),양성모(Sung Mo Yang),유효선(Hyo Sun Yu) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.11
Soldering is very important packaging core technology in bonding process and recently the importance of soldering technology came to the fore. Also, Depending on the trend of miniaturization, lightweight and high performance of electronic devices, mechanical property evaluation is significantly considered such as high temperature creep property of solder joints. According to the environmental policy about previously used Sn-Pb eutectic solder, many research about the Pb-free is studied in the world. In this paper, in order to investigate the high temperature creep property of the solder joints about Sn-Pb eutectic solder and Sn-Ag-(Cu) types Pb-free solder, analyzed high temperature creep behavior using a shear punch-creep test equipment with reflow time(100, 300sec) and various load(5㎫ ~ 18㎫). As a result, a creep behavior of Sn-Ag-(Cu) types Pb-free solder is more superior to Sn-Pb solder and showed different creep behavior under various solder joints.
Selective Synthesis of 3,4-Dihydrocoumarins and Chalcones from Substituted Aryl Cinnamic Esters
전종갑,Deok-Mo Yang,Jong-Gab Jun 대한화학회 2011 Bulletin of the Korean Chemical Society Vol.32 No.1
Coumarins are ubiquitous in plant kingdom and have been used as antitumor, antifungals, anticoagulants, insecticides. Chalcones are also widespread in plant kingdom and have been known to possess diverse biological activities;antibacterial, antifungal, antitumor and anti-inflammatory, etc. As they are considered as important natural products,numerous synthetic approaches have been reported up to the present. We devise a new selective method of preparing dihydrocoumarins and chalcones from aryl cinnamates by the selection of reagents. Dihydrocoumarin derivatives were prepared selectively by using intramolecular cyclization catalyzed by p-toluene sulfonic acid. Also, chalcones were prepared by Fries-rearrangement catalyzed by TiCl4. This method can be used for preparing various coumarin & chalcone compounds.
Clinicopathological correlation and post-resection outcomes of hepatic angiomyolipoma
Geunhyeok Yang,Shin Hwang,Chul-Soo Ahn,Ki-Hun Kim,Deok-Bog Moon,Tae-Yong Ha,Gi-Won Song,Dong-Hwan Jung,Gil-Chun Park,Seung-Mo Hong 한국간담췌외과학회 2021 Annals of hepato-biliary-pancreatic surgery Vol.25 No.2
Backgrounds/Aims: Angiomyolipoma is a rare neoplasm of mesenchymal origin derived from perivascular epithelioid cells. Due to rarity, hepatic angiomyolipoma (HAML) has been often misdiagnosed as hepatocellular carcinoma (HCC) or other hypervascular liver tumors based on imaging studies. This study investigated the clinicopathological correlation and post-resection outcomes of HAML. Methods: This retrospective observational study included 40 patients who underwent hepatic resection (HR) for HAML between 2008 and 2018. Results: Mean age of the patients was 42.6±11.4 years and there were 30 (75.0%) females. Hepatitis B and C virus infection was present in 8 patients (20.0%) and 1 patient (2.5%), respectively. Preoperative diagnoses on imaging studies were HCC in 23 (57.5%) patients, HAML in 14 (35.0%) patients, focal nodular hyperplasia in 2 (5.0%) patients, and hepatic adenoma in 1 (2.5%) patient. Percutaneous liver biopsy was performed in 10 (25.0%) patients and HAML was diagnosed in all patients. Only 3 patients (7.5%) showed a slight elevation in the level of liver tumor markers. Major HR was performed in 10 (25.0%). Laparoscopic HR was performed in 9 (22.5%). The mean tumor size was 4.8±3.9 cm and single tumor was present in 38 (95.0%) patients. Currently, all the patients are alive without tumor recurrence during the follow-up observation period of 75.7±37.3 months. Conclusions: HAML is a rare form of primary liver tumor and is often misdiagnosed as HCC or other hypervascular tumors. Although HAML is benign in nature, it has malignant potential, thus resection is indicated if the tumor grows or malignancy cannot be excluded.
Angiomyofibroblastoma-Like Tumor of the Scrotum
Lee, Seung Hyun,Yang, Jung Wook,Do, Jung Mo,Seo, Deok Ha,Jung, Jae Hun,Chung, Ky Hyun,Lee, Jong Sil,Hyun, Jae Seog The Korean Urological Association 2010 Korean Journal of Urology Vol.51 No.5
<P>Various tumors can occur in the scrotum. Of them, angiomyofibroblastoma-like tumors are very rare mesenchymal tumors. Angiomyofibroblastoma-like tumors cannot be easily differentially diagnosed from other malignant tumors invading the male genital tract on the basis of clinical characteristics and imaging study. Therefore, surgical removal and a histopathologic diagnosis must also be performed.</P>