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Uses and Gratification on eWOM Tourism Information
Yang,Sung-Soo,Huh,Hyang-Jin,Suh,Yong-Kun 세계문화관광학회 2009 Conference Proceedings Vol.10 No.0
This study draw on the uses and gratifications perspective in tourism information research to examine the tourist experience associated with website. The goal of this study is to investigate the extent to eWOM(electronic Word-of-Mouth) using motivation and gratification. In methodological sense, the survey was employed in user of destination search for travel and performed application with AVOVA for analysis. Data collecting method was a convenience sampling with face-to-face interview. A total of 600 questionnaires were collected from the survey and 577 questionnaires were coded for a data for analysis on this study. Data for the study were drawn from the user who have been travel information on eWOM. The findings deriving from this study are followings; First, Perception of using motivation is consist of 5 dimensions such as Self-Development, Information Acquisition, Enjoyment, Community, and Travel Cost. Second, The findings deriving from this study is a statistically significant difference in the relationship between the using dimensions and user propensity of eWOM tourism information. Finally, using motivation was positively related with behavioral intentions of making process.
( Sul Lee ),( Hyung Joon Yoon ),( Eun Hye Jeon ),( Juseok Yang ),( Yong Jung Song ),( Hyun Jin Roh ),( Sang Hun Lee ),( Byung Su Kwon ),( Ki Hyung Kim ),( Dong Soo Suh ) 대한산부인과학회 2019 대한산부인과학회 학술대회 Vol.105 No.-
Objective: The aim of this study is to evaluate oncologic outcomes of total abdominal radical hysterectomy (TARH), total laparoscopic radical hysterectomy (TLRH) and laparoscopic-assisted radical vaginal hysterectomy (LARVH) in early cervical cancer patients (stage IB2-3, tumor size≥2cm), analyzing the risk factors that may affect the clinical results. Methods: A total of 756 patients underwent radical hysterectomy between 2000 and 2019 from three university hospitals (Pusan National University Hospital, Yang-san Pusan National University Hospital, Ulsan University Hospital) were enrolled. Among them, 172 patients with stage IB2-3 were analyzed retrospectively. Results: Seventy-seven patients were treated with TARH, and 95 were managed via minimally invasive surgery (MIS), consisting of 35 with TLRH and 60 with LARVH. TARH group had better disease five-year disease free survival (DFS) and overall survival (OS) compared with MIS group (86.4% vs. 73.4 for DFS and 91.7 vs. 82.2 for OS), but not statistically significant in both (p=0.058 for DFS and p=0.119 for OS). When TARH and the LARVH group were compared, both five-year DFS and OS were not significant different (86.4 vs 82.2%; p=0.288 for DFS and 91.7 vs 84.4%; p=0.206 for OS). However, when TARH and the TLRH group were compared, TLRH group had significantly worse five-year DFS than TARH (86.4 vs 54.5%; p=0.008), but five-year OS was not significant different (91.7 vs 77.5%; p=0.127). Multivariate analysis showed that LN metastasis and TLRH surgical approaches were an independent prognostic factor for DFS in IB2-3 cervical cancers. Conclusion: Our findings provided the evidence that TLRH surgical approach was associated with worse DFS in IB2-3 cervical cancers but that of LARVH was not. Such results may have important implications of colpotomy method for MIS in cervical cancer.
Yang, Hyun Kyoung,Park, Sung Jun,Park, Jin Young,Je, Jae-Yong WISSENSCHAFTLICHE VERLAGSGESELLSCHAFT MBH 2017 Optik Vol. No.
<P><B>Abstract</B></P> <P>Gd<SUB>0.99-x</SUB>VO<SUB>4</SUB>:Tm<SUP>3+</SUP> <SUB>0.01</SUB>/Yb<SUP>3+</SUP> <SUB>x</SUB> phosphors with different Yb<SUP>3+</SUP> concentration (0.01–0.07mol) and sintering temperatures (450–600°C) were synthesized by the planetary ball milling method. The structural properties were analyzed using the X-ray diffraction patterns, which conform the poly phase with Na<SUB>3</SUB>Gd(VO<SUB>4</SUB>)<SUB>2</SUB> and GdVO<SUB>4</SUB>. Upconversion luminescence was investigated under the 975nm laser diode. The upconversion spectra of Gd<SUB>0.99-x</SUB>VO<SUB>4</SUB>:Tm<SUP>3+</SUP> <SUB>0.01</SUB>/Yb<SUP>3+</SUP> <SUB>x</SUB> show two emission peak in <SUP>1</SUP>G<SUB>4</SUB> → <SUP>3</SUP>H<SUB>6</SUB> (477nm, blue) and <SUP>3</SUP>H<SUB>4</SUB> → <SUP>3</SUP>H<SUB>6</SUB> (802nm, NIR) of the Tm<SUP>3+</SUP> transitions, together with the <SUP>2</SUP>F<SUB>5/2</SUB> → <SUP>2</SUP>F<SUB>7/2</SUB> transition of Yb<SUP>3+</SUP>. Gd<SUB>0.92</SUB>VO<SUB>4</SUB>:Tm<SUP>3+</SUP> <SUB>0.01</SUB>/Yb<SUP>3+</SUP> <SUB>0.07</SUB> phosphor sintered at 600°C is expected to find potential applications such as blue LED by the near infra-red (NIR) excitation.</P>
Yang, Dae Gyu,Do Kim, Hyoung,Kim, Jong Heon,Lee, Sung Woo,Park, Jozeph,Kim, Yong Joo,Kim, Hyun-Suk Elsevier S.A. 2017 Thin Solid Films Vol.638 No.-
<P><B>Abstract</B></P> <P>Thin film transistors (TFTs) incorporating high mobility In-Ga-Zn-O (IGZO) semiconductors were fabricated and evaluated. The Ar:O<SUB>2</SUB> gas flow rates were varied during the sputter growth of IGZO layers, which had a substantial influence on the device performance and stability under negative bias stress (NBS) and negative bias illumination stress (NBIS). As the Ar gas flow rate is increased, the TFTs exhibit inferior performance and stability. Thin film analyses indicate that the relative content of oxygen deficient sites in IGZO increases with increasing Ar gas flow rate, which is accompanied with more pronounced device degradation under bias stress. Relatively high oxygen deficiency usually leads to the generation of excess free carriers in oxide semiconductors, which normally results in high field effect mobility. However a counter-intuitive decrease in mobility is observed in this work, which is suggested to originate from the overall decrease in IGZO film density as a result of elevated sputtering pressure at high Ar gas flow rates. It is conjectured that disruptions of conduction paths occur in low density IGZO layers, owing to the lack of overlap between metal 5s orbitals.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The TFTs incorporating high mobility IGZO semiconductors </LI> <LI> The Ar:O<SUB>2</SUB> gas flow rates during the sputter growth of IGZO layers </LI> <LI> The disruptions of conduction paths in low density IGZO layers </LI> </UL> </P>
The Prediction of Resistance of a 23m Class Planing Hull
Yang, Seung-Il,Shin, Myung-Soo,Park, Yong-Jea,Min, Keh-Sik,Kim, Jae-Shin,Kim, Hyo-chul,Hong, Sung-Wan,Lee, Seung-Hee,Lee, Young-Gill,Chung, Jung-Han The Society of Naval Architects of Korea 1996 Journal of hydrospace technology Vol.2 No.2
The present report describes the results of the cooperative experimental study organized by the High-Speed Marine Vehicle Committee of the Korea Towing Tank Conference. The study aims to improve model test technique and accuracy and to self-evaluate their own capabilities. The resistance tests of a 23m class planing hull were performed at the towing tanks of the Korea Research Institute of Ships and Ocean Engineering (KRISO), Hyundai Maritime Research Institute (HMRI), Seoul National University (SNU), Inha University (IU) and Pusan National University (PNU). In addition, the longitudinal wave cut was measured antral and analyzed at the KRISO. All the results of total resistance, trim and mean sinkage are presented in this report and the results show fairly good agreements comparing with the ITTC HSMV committee's report.
Yang, In Seok,Sohn, Mi Rae,Sung, Sang Do,Kim, Yong Joo,Yoo, Young Jun,Kim, Jeongho,Lee, Wan In unknown 2017 Nano energy Vol.32 No.-
<P><B>Abstract</B></P> <P>By employing CuSCN, a low-cost inorganic hole transporting material (HTM), CH<SUB>3</SUB>NH<SUB>3</SUB>PbI<SUB>3</SUB> perovskite solar cell (PSC) devices with high efficiency and extended stability were successfully fabricated in this work. In particular, we developed a facile method of depositing CuSCN layer reproducibly by a simple spray deposition technique, which allows the formation of the CuSCN layer without any significant damage of the underlying CH<SUB>3</SUB>NH<SUB>3</SUB>PbI<SUB>3</SUB> layer. The fabricated PSC with ~50nm-thick pristine CuSCN layer exhibits the photovoltaic conversion efficiency (PCE) of 17.10% with <I>J</I> <SUB> <I>SC</I> </SUB> of 23.10mA/cm<SUP>2</SUP>, <I>V</I> <SUB> <I>OC</I> </SUB> of 1,013mV and <I>FF</I> of 0.731. Compared with conventional PSCs based on spiro-OMETAD HTM, the PSC employing CuSCN exhibits higher value of <I>J</I> <SUB> <I>SC</I> </SUB>, suggesting that CuSCN transports holes more efficiently than spiro-OMETAD. Furthermore, PSCs employing the pristine CuSCN demonstrate a remarkable long-term stability at ambient condition with the decrease of PCE by only 5.8% after 100 days. In addition, the PCE decrease during the encapsulation process at 120°C was merely 13%, which is much lower value than ~70% observed for the conventional device based on spiro-OMETAD, indicating excellent thermal stability of the CuSCN-based PSCs.</P> <P><B>Highlights</B></P> <P> <UL> <LI> A facile spray deposition technique to deposit the CuSCN HTM layer is developed. </LI> <LI> The perovskite layer is not appreciably damaged during the spray deposition of CuSCN. </LI> <LI> Perovskite solar cell (PSC) with the pristine CuSCN layer exhibits PCE of 17.10%. </LI> <LI> PSCs with the CuSCN demonstrate remarkable long-term and thermal stabilities. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
A Black Metal-dielectric Thin Film for High-contrast Displays
Sang-Hwan Cho,Min-Kyo Seo,강주형,Jin-Kyu Yang,Sung-Yong Kang,KyuHwan Hwang,ByoungDuk Lee,Joon-Gu Lee,Young-Woo Song,JongHyuk Lee,이용희 한국물리학회 2009 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.55 No.2
We demonstrate a thin metal-dielectric structure that delivers low reflection and high absorption over the entire visible spectrum. The thin black film consists of SiO2/Cr/SiO2/Al layers deposited on a glass substrate. The measured reflectance and absorptance of the black film are 0.7% and 99.3%, respectively, when averaged over the range 380 – 780 nm. The total thickness of the black film is only about 220 nm, and it can be used as a thin absorbing layer for displays that require both broadband antireflection and high-contrast characteristics.
Yang, Geon Gug,Choi, Junhwan,Cha, Seung Keun,Lee, Gil Yong,Jin, Hyeong Min,Hwang, Ho Seong,Yun, Taeyeong,Kang, Juyeon,Han, Kyu Hyo,Kim, Jang Hwan,Choi, Hee Jae,Im, Sung Gap,Kim, Sang Ouk American Chemical Society 2019 ACS NANO Vol.13 No.11
<P>Block copolymer (BCP) lithography is an effective nanopatterning methodology exploiting nanoscale self-assembled periodic patterns in BCP thin films. This approach has a critical limitation for nonplanar substrate geometry arising from the reflow and modification of BCP films upon the thermal or solvent annealing process, which is inevitable to induce the mobility of BCP chains for the self-assembly process. Herein, reflow-free, 3D BCP nanopatterning is demonstrated by introducing a conformally grown adlayer by the initiated chemical vapor deposition (iCVD) process. A highly cross-linked poly(divinylbenzene) layer was deposited directly onto the BCP thin film surface by iCVD, which effectively prevented the reflow of BCP thin film during an annealing process. BCP nanopatterns could be stabilized on various substrate geometry, including a nonplanar deformed polymer substrate, a pyramid shape substrate, and a graphene fiber surface. A fiber-type hydrogen evolution reaction (HER) catalyst is suggested by stabilizing lamellar Pt nanopatterns on severely rough graphene fiber surfaces.</P> [FIG OMISSION]</BR>