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수출 딸기 팔레타이징 적합 상자 및 파프리카 전용 수확 상자에 따른 선도유지 효과
정민재(Minjae Jeong),조미애(Mi Ae Cho),정재은(Jae Eun Jeong),조동래(Donglae Jo),홍세진(Se Jin Hong),황인근(In-gun Hwang),장민선(Min-Sun Chang),엄향란(Hyang Lan Eum),홍윤표(Yoon-Pyo Hong) 한국원예학회 2021 한국원예학회 학술발표요지 Vol.2021 No.10
딸기는 꾸준히 수출량이 증가하고 있으며 주로 홍콩, 싱가포르 등 동남아국가로 수출되고 있다. 딸기 수출 시 진주, 논산, 담양 등 국내 주요 산지별 외포장 상자 규격이 다르고, 팔레타이징에 부적합하여 장거리 운송 중 흔들림으로 인한 딸기 품질저하가 발생되는 문제점이 있다. 파프리카는 수출 시 저온장해, 꼭지부패, 착색불량 등 품질저하로 인한 클레임이 발생되고 있으며 특히 수확 및 예냉 시 주로 사용되는 상자는 파프리카 호흡특성에 적합하지 않아 개선이 필요한 상황이다. 이에 본 연구에서는 딸기 수출 시 팔레타이징에 적합한 포장상자를 표준화하고, 파프리카 호흡특성에 적합한 개공율을 개선한 상자를 개발하여 선도유지 효과를 알아보고자 하였다. 개선된 팔레타이징 적합 딸기 외포장 상자 규격은 L 520 × W 270 × H 75 mm로 다단 적재 시 상자의 미끄럼 방지 및 고정을 위한 틀을 추가하였고, 측면 공기 순환구를 통해 통기를 원활하게 하였다. 또한 파프리카 수확 상자는 개공율을 3~4% 수준으로 낮춰 수분 손실로 인한 증산작용을 억제하는데 효과적이었다. 딸기 팔레타이징 적합 상자 및 파프리카 수확 상자 적용으로 손실률을 절감하고, 수출 시 상품성이 향상되리라 기대한다.
Minjae Kim,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 대한외과학회 2021 Annals of Surgical Treatment and Research(ASRT) Vol.100 No.5
Purpose: Combined hepatocellular carcinoma and cholangiocarcinoma (cHCC-CC) has wide histologic diversity. This study investigated the effects of cHCC-CC histology, according to the 2010 World Health Organization (WHO) classification, on patient prognosis. Methods: The medical records of patients who underwent surgical resection for cHCC-CC at our institution between July 2012 and June 2019 were retrospectively evaluated. Results: During the study period, 168 patients, 122 males (72.6%) and 46 females (27.4%), underwent surgical resection for cHCC-CC, including 159 patients (94.6%) who underwent R0 resection. Mean tumor diameter was 4.4 ± 2.8 cm, and 161 patients (95.8%) had solitary tumors. Histologically, 86 patients (51.2%) had classical type, and 82 (48.8%) had tumors with stem cell (SC) features, including 33 (19.6%) with intermediate-cell and 23 (13.7%) each with typical SC and cholangiolocellular features; 3 tumors (1.8%) were unclassifiable. At 1, 3, and 5 years, tumor recurrence rates were 31.9%, 49.6%, and 58.1%, respectively, and patient survival rates were 91.0%, 70.2%, and 60.3%, respectively. Univariate analysis showed that tumor size of >5 cm, microscopic and macroscopic vascular invasion, lymph node metastasis, 8th edition of the American Joint Committee on Cancer (AJCC) tumor stage, and 2010 WHO classification were significantly prognostic. Multivariate analysis showed that the 8th AJCC tumor stage and 2010 WHO histologic classification were independently prognostic for tumor recurrence and patient survival. There were no significant prognostic differences among the 3 SC subtypes. Conclusion: Postresection outcomes are better in patients with SC-type than with classical-type cHCC-CC.
Minjae Maeng,Ji-Hoon Kim,Jong-Am Hong,박용섭 한국물리학회 2016 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.68 No.5
Using UV and X-ray photoelectron spectroscopy (UPS & XPS), we have studied the work function (WF) evolution and chemical changes of an indium-tin-oxide (ITO) surface after a series of in-situ oxygen plasma treatments (OPTs). We took special care not to damage the sample’s surface with OPT by employing the weakest possible plasma conditions. Even after such gentle OPT the WF of ITO dramatically increased up to 6.6 eV after about 300 s of OPT. The carbon contamination at the surface was completely removed after only 40 s of the gentle OPT. However, in contrast to similar studies, the compositions and the chemical states of In, Sn, and O at the ITO surface showed only minimal changes as confirmed by XPS core-level peak analyses.
Predicting European carbon emission price movements
Hong, KiHoon,Jung, Hojin,Park, Minjae Taylor Francis 2017 Carbon management Vol.8 No.1
<P>The European carbon emission trading market is critical in achieving planned carbon emission reduction for global sustainable growth. This paper investigates various statistical methods in forecasting the European carbon emission (CO2 hereafter) price movements. The paper builds a predictive regression model of CO2 price movements with past returns of various commodities and financial products. In the paper, 22 functional forms of five different classifiers are employed and CO2 price movements are forecast. Results indicate that the past returns of Brent crude futures, natural gas (NG), Financial Times Stock Exchange 100 (FTSE100), Deutscher Aktienindex (German stock index) 30 (DAX30), Cotation Assistee en Continu (French stock index) 40 (CAC40) and Standard & Poor's 500 (S&P500) are statistically significant in forecasting the current CO2 price movements. The authors also found that the bagged decision tree of the ensemble classifier best forecasts the CO2 price movements. The result should be relevant to firms that wish to trade European carbon emissions.</P>
Simultaneous liver-kidney transplantation: A single-center experience in Korea
Minjae Kim,Shin Hwang,Chul-Soo Ahn,Deok-Bog Moon,Tae-Yong Ha,Gi-Won Song,Dong-Hwan Jung,Sung Shin,Young Hoon Kim,Hea-Seon Ha,Jung-Ja Hong,In-Ok Kim,Duck Jong Han,Sung-Gyu Lee 한국간담췌외과학회 2020 Annals of hepato-biliary-pancreatic surgery Vol.24 No.4
Backgrounds/Aims: Simultaneous liver and kidney transplantation (SLKT) has been established as the treatment of choice for patients with concurrent end‐stage liver and end‐stage kidney diseases. The objective of this study was to analyze the nationwide incidence of SLKT in Korea and the outcomes of SLKT in a high-volume transplant center. Methods: Databases of the Korean Network for Organ Sharing (KONOS) and Asan Medical Center from 2000 to 2019 were retrospectively reviewed to determine the incidence of SLKT. Results: During 20 years from 2000 to 2019, deceased donor SLKT was performed for 38 cases in the KONOS database. The proportion of deceased donor SLKT was 0.6% (20 of 3333) before adoption of MELD score, which was significantly increased to 1.2% (18 of 1524) after the adoption of MELD score (p=0.034). In our institution, there were 11 cases of SLKT (2 cases with deceased donors and 9 cases with living donors). SLKT accounted for 0.2% (11 of 6468) of total liver transplantation volume. During follow-up, five patients died due to hepatocellular carcinoma recurrence (n=2), infection (n=2), or unknown cause (n=1). The 1-year and 10-year overall patient survival rates were 90.9% and 81.8%, respectively. Conclusions: Results of this study revealed that the incidence of deceased donor SLKT was very low. An increase of such incidence is not anticipated unless the number of deceased donors is markedly increased. Currently, sequential living donor liver transplantation and kidney transplantation with deceased or living donors are mainstays of transplantation rather than SLKT in our institution.
Hong, Seokjun,Kwon, Yeongdae,Jung, Changhyun,Lee, Minjae,Kim, Taehyun,Cho, Dong-il Dan Institute of Electrical and Electronics Engineers 2018 Journal of microelectromechanical systems Vol.27 No.1
<P>Accumulated electrostatic charges on the dielectric surfaces of ion traps are known to induce stray fields, leading to ion micromotions. In typical microfabricated ion-trap chips, metal electrodes are electrically isolated using thick dielectric pillars, which can accumulate stray charges on their sidewalls. This letter presents a new microfabrication method for ion-trap chips that reduces the exposure of dielectric surfaces to trapped ions. The dielectric pillars are fabricated with large T-shaped overhangs, and the sidewalls and top surfaces are coated with AlCu (1%) films. The bottom sides of the overhang parts provide electrical isolation. To prevent oxidation of the AlCu (1%) films, the electrode surfaces are coated with an additional Au film. The fabricated chips were implemented to trap <SUP>174</SUP>Yb<SUP>+</SUP> ions, and the laser-induced stray fields were measured. The results indicated that the trap chip fabricated by the newly developed method generates significantly smaller stray fields as compared with previous chips. [2017-0233]</P>
Kim, Minjae,Puthiaraj, Pillaiyar,So, Jae-Il,Seong, Hong-Gyu,Ryu, Jihyeong,Ahn, Wha-Seung,Shim, Sang Eun Elsevier 2018 Synthetic metals Vol.243 No.-
<P><B>Abstract</B></P> <P>Two different heteroatom-doped microporous carbon materials, c-CBAP-N (nitrogen-doped) and c-CBAP-NS (nitrogen/sulfur co-doped), were prepared using a carbonyl-based aromatic porous polymer (CBAP) after amine-functionalization or chemical impregnation, followed by carbonization at 800 °C. The surface areas of c-CBAP-N and c-CBAP-NS were 1060 m<SUP>2</SUP> g<SUP>−1</SUP> and 1047 m<SUP>2</SUP> g<SUP>−1</SUP>, respectively, which are predominantly microporous with a uniform pore size distribution centered at 0.4 nm. Their electrochemical performances as supercapacitors were measured by a three-electrode system using a 6 M KOH solution as the electrolyte. The specific capacitances of the c-CBAP-N and c-CBAP-NS electrodes were 203.2 F g<SUP>−1</SUP> and 157.7 F g<SUP>−1</SUP>, respectively, as measured by galvanostatic discharge–charge analysis at a current density of 1 A g<SUP>−1</SUP>. Notably, these values are significantly higher than that of commercial activated carbon (130 F g<SUP>−1</SUP> at 1 A g<SUP>−1</SUP>).</P> <P><B>Highlights</B></P> <P> <UL> <LI> Carbon supercapacitor electrodes were derived from a carbonyl-based porous polymer. </LI> <LI> Porous carbons had a high surface area with regular porosity and heteroatom species. </LI> <LI> Nitrogen-doped carbon supercapacitor showed good electrochemical properties. </LI> </UL> </P>