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양한나(Hanna,Yang),엄지연(Jiyoen, Uem),원현경(Heonkyung, Won),유예슬(Yeosul,Yoo),이가영(Gayoung, Lee),이규란(Gyulan, Lee) 성신여자대학교 경영연구소 2012 경영관리연구 Vol.5 No.2
IT기술의 발달은 공급자가 되기 위한 벽을 허물면서 많은 소비자들을 소비와 동시에 생산을 하는 프로슈머화시켰다. 특히, 웹2.0시대를 주도한 UCC 열풍은 모바일2.0 시대와 더불어 팟캐스트로 이어지며, 방송 산업의 모든 진입 장벽을 허물고, 방송의 민주화 시대를 열었다. 최근 주류 미디어 또한 광고와 함께 파괴력 있는 재가공 콘텐츠를 팟캐스트에서 무료로 제공하게 되면서 사용자수가 대폭 늘어나고, 관련 광고 시장이 급속도로 팽창하고 있다. 뿐만 아니라 우리나라에서도‘나는 꼼수다’와 같이 거침없고 직설적인 표현으로 무겁게만 여겨졌던 시사 이슈들을 일상 속의 대화형식으로 가볍게 다룸으로써 대중들의 관심과 참여를 이끌어내는데 성공한 팟캐스트도 등장하면서, 팟캐스트의 대중화가능성을 보여주기도 했다. 하지만, 팟캐스트는 방송심의에서 제외된 매체이기 때문에 자유로운 의사표현을 제재할 도구가 없고 사실과 왜곡된 정보들이 넘쳐날 가능성도 다분하다. 따라서 본 연구에서는 먼저 팟캐스트의 등장배경 및 시장의 특징에 대해 살펴보고,‘나는 꼼수다’ 사례를 중심으로 팟캐스트의 발전가능성과 문제점을 진단해 보고자 한다. The advance of IT has broken down the wall of being producer so that many consumers could have the role of prosumer, by consuming and producing together. In this vein, the UCC of Web 2.0 turned to the Podcast of Mobile 2.0, which opened the democratization of broadcasting. Recently, mainstream media also started to join the Podcast market with the free version of influential contents and advertisement, which leads to the growth of customerbase and advertizing opportunity in Podcast services. In Korea, "I am ggomsu" showed the potentials of popularization of Podcast, by successfully getting the attention of customers via the outspoken expressions and interactive operation of the political topics. However, because Podcast is exceptional in broadcasting review, it also presented the limitation as a media in terms of both form and matters. In this paper, we investigate the background and market characteristics of Podcast first, then focus on the pros and cons of Podcast in order to measure the potential of Podcast service.
Evaluation of the Coal Ash Leaching Procedures at Mine Reclamation Sites
( Hanna Cho ),( Joo-yang Park ) 한국폐기물자원순환학회(구 한국폐기물학회) 2016 한국폐기물자원순환학회 춘계학술발표논문집 Vol.2016 No.-
Numerous leaching procedures for coal ash have demonstrated that the quantity of the extracted major and trace elements can be extremely variable, depending on the nature of both the coal ash and the leaching solution. It is difficult to identify the suitable leaching method for coal ash according to the particular situation in the field area. Nevertheless, to reduce deviations between leaching test estimates in the laboratory and measurements in the field, the appropriate leaching test must be identified and the appropriate leaching procedures with the right conditions must be selected. Site-specific conditions must be given due attention in the selection of a leaching test for coal ash. In South Korea, there is one legal leaching procedure: KLP(Korea leaching procedures). To find suitable leaching procedures for using coal ash at mine reclamation sites in South Korea, several leaching procedures relative to coal ash were reviewed and evaluated. To evaluate KLP according to its release of coal ash elements by comparing it with that of other leaching methods, data on several leaching methods, such as KLP, TCLP(Toxicity characteristic leaching procedure), SPLP(Synthetic precipitation leaching procedure), and MWLP(Mine water leaching procedure) were collected and analyzed. It was observed from this research that the KLP might have underestimated the leaching potential of nearly each trace metal in the analysis. Also, KLP appeared to have in accurately predicted the long-term effect of coal ash in mine environments. Most Korean coal ashes have alkaline characteristics, and when their alkalinity has been exhausted, their leachate becomes acidic. There is no suitable leaching procedures for acid environments in Korea. Due to this fact, the pH of the MWLP buffer solution was lower than that of other procedures. MWLP effectively exhausts elements of coal ash and helps determine the long-term leaching behavior of waste placed in acid environments. Therefore, MWLP mab be a more appropriate leaching test for the environmental impact assessment of the use of coal ash at mine reclamation sites in Korea.
The Buccofacial Wall of Maxillary Sinus: An Anatomical Consideration for Sinus Augmentation
Yang, Hun-Mu,Kyong Bae, Hanna Eun,Won, Sung-Yoon,Hu, Kyung-Seok,Song, Woo-Chul,Paik, Doo-Jin,Kim, Hee-Jin Wiley (Blackwell Publishing) 2009 Clinical Implant Dentistry and Related Research Vol. No.
<P>PURPOSE: This study aimed to quantify the thickness of the buccofacial wall of the maxillary sinus where sinus augmentations are often performed. MATERIALS AND METHODS: Fourteen sites located 15 and 20 mm superior to the anatomical cervical line (named as groups H15 and H20, respectively) and along the long axes of the mid and the interproximal of two premolars and two molars were measured from 74 Korean hemiface cadavers. RESULTS: The buccofacial wall of the maxillary sinus was thinnest at the area between the maxillary second premolar and first molar in groups H15 and H20. The lowest mean thickness was 1.2 mm in both groups. The walls were thicker in males than in females, with statistically significant gender differences found at four and two sites on the anterior horizontal reference in groups H15 and H20, respectively. However, the thickness did not differ significantly with age or laterality. Incomplete septa were found in seven of the 74 specimens, and they were present in the area between the first and second molars in six (86%) of these cases. CONCLUSIONS: These observations indicate that anatomical characteristics of the buccofacial wall thickness of the maxillary sinus need to be considered when performing a window opening procedure for sinus augmentation.</P>
S-317 Influence of Additional Ballooning after Stent Implantation in Acute Myocardial Infarction.
( Hanna Joung ),( Ju Yeol Baek ),( Yong Mo Yang ),( Won Ik Lee ),( Seung-woon Rha ),( Byoung Geol Choi ),( Seung Won Jin ),( Byung Ryul Cho ),( Moo Hyun Kim ),( Doo-il Kim ),( Myung-ho Jeong ),( Sang 대한내과학회 2016 대한내과학회 추계학술대회 Vol.2016 No.1
Objective:?Most studies evaluating the benefit and risk of additional ballooning after stent implantation have involved patients with stable angina. However, it may be questionable in the context of patients presenting with acute myocardial infarction (AMI). We evaluated the clinical outcomes of additional ballooning after stent implantation in the patients who underwent AMI. Methods:?A total of 1618 AMI patients in the Korea TRI registry, a retrospective multicenter registry with 4890 patients who underwent percutaneous coronary intervention in 2009 at 12 centers were grouped according to performing additional ballooning (AB; N=814) and non-additional ballooning (Non-AB; N=804) after stent implantation. We compared TLR MACE at 12 month follow up, defined as total mortality, any myocardial infarction (MI), target vessel revascularization (TVR) between two groups.?Results:?After adjustment using 1:1 propensity score stratification, the incidence of TVR MACE at 12 month follow up was similar between both groups. However AB group had higher mortality (5.0% vs 2.4%; hazard ratio 2.15; 95% confidence interval 1.01 to 4.57; p=0.046) and the incidence of myocardial infarction (0.9% vs 1.6%; p=0.363) and TVR (3.8% vs 5.7%; p=0.195) were similar between two groups.?Conclusions: In patients with AMI, clinical result of AB after stent implantation could be similar with it of Non-AB in the 12month TVR MACE. However AB could be associated with significantly higher total mortality at 12 month follow up.
이산화탄소 흡착 기능을 부여한 Microcrystalline Cellulose(MCC)를 충전제로 사용한 폴리에틸렌 복합체 제조 및 그 물성에 관한 연구
김한나(Hanna Kim),양여경(Yeokyung Yang),황기섭(KiSeob Hwang),하기룡(KiRyong Ha) 한국고분자학회 2017 폴리머 Vol.41 No.6
본 연구에서는 생분해성 재료인 미세결정셀룰로오스(MCC) 분말 표면에 아미노기를 가지는 실란 커플링제인 3-aminopropyltriethoxysilane(APS) 및 trimethoxysilylpropyl modified polyethylenimine(TPPI)로 표면 개질하여 이산화탄소(CO₂) 흡착 기능을 가지는 충전제를 제조하고, 저밀도 폴리에틸렌(LDPE)과 혼합하여 고분자 복합체를 제조하는 연구를 수행하였다. APS 및 TPPI에 의해 표면 개질된 MCC 분말의 CO₂ 흡착 기능은 열중량분석기(TGA)로 분석하였다. 또한 개질된 MCC를 충전제로 사용하여 LDPE/MCC 복합체를 제조하고, 복합체의 기계적 물성은 만능재료시험기(UTM), MCC와 LDPE 계면에서의 상용성은 주사전자현미경(SEM)으로 측정하였다. APS 및 TPPI로 개질된 MCC는 순수 MCC 충전제 분말보다 LDPE와 상용성이 더 높아서, 인장강도, 파단연신율 및 영률 모두 증가함을 알 수 있었다. In this study, we modified biodegradable microcrystalline cellulose (MCC) powders with 3-aminopropyltriethoxysilane (APS) or trimethoxysilylpropyl modified polyethylenimine (TPPI) silane coupling agents, which have CO₂ adsorbable amino groups. After silanization, surface treated MCC fillers were melt blended with low density polyethylene (LDPE) to prepare LDPE/MCC composites. The adsorption amount of CO₂ on surface modified MCC powders was analyzed by thermogravimetric analyzer (TGA). Mechanical properties of composites were measured by universal testing machine (UTM), and the compatibility between MCC powders and LDPE were investigated at their interfaces by scanning electron microscope (SEM). MCC powders modified with APS or TPPI showed higher tensile strength, elongation at break and modulus due to higher compatibility with LDPE compared to pristine MCC filler powder.