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朴寧弼,李圭燮,權聖奎 연세대학교 대학원 1988 延世論叢 Vol.24 No.-
In order to improve the performance of the suspension system for mass transport vehicle with prescribed dynamic behavior, a synthesis procedure of eliminating "Hunting" was studied to yield resonant velocities outside the range of most frequent operation. Effect of changing in the spring stiffnesses on the resonant velocities of the system was considered. The effects of damping on the suspension system was analyzed through the Root Locus Analysis. And Root Contours Method was used to obtain the optimal damping values. Hunting is controlled by using a proper damping into the secondary suspension.
정성문 · 정지미 · 이규용 · 김건우 · 김권호 · 박수정 · 양태완 · 지준영 · 이우평 신라대학교 부산학연구센터 2020 부산연구 Vol.18 No.2
본 연구는 부산지역의 주요기업 변화를 살펴보기 위해 매출액 기준 전국 상위 1,000대 기업에 속하는 부산기업을 조사하여 비교분석을 실시하였다. 분석결과 2005년에 전국 1,000대 기업 중 46개 기업이 부산에 소재하였는데, 2019년에는 12 개가 줄어든 34개 기업만이 전국 1,000대 기업에 포함되었다. 또한, 전국 상위 1,000대 기업의 매출액 기준으로 부산지역 기업의 매출액 비중은 2005년 1.6%에서 2019년 1.4%로 줄어든 것으 로 나타났다. 이는 수도권 집중현상이 점차 강화되고 있기 때문이다. 한편, 부산지역 매출액 기준 상위 10대 기업은 많은 변화가 있었는데, 2005년 상위 10대 기업 중 2019년에도 상위 10대 기 업에 포함된 기업은 ㈜한진중공업, 르노삼성자동차(주), ㈜부산은행, ㈜서원유통 등 4개뿐인 것 으로 나타났다. 통계적 인과 관계는 확정할 수 없으나 지역 대기업의 쇠퇴 및 유출과 지역의 쇠퇴가 동시에 이루어지고 있어 지역 경제의 침체와 대기업의 쇠퇴 및 유출이 상당한 관계가 있음을 유추해 볼 수 있다. 특히 2011년 이후 지역 주력 제조업 기업들이 1000대 기업 진입에 실패하였다는 점을 주목해 볼 필요가 있다. 지역 제조업 대기업의 이탈 또는 쇠퇴는 지역 생산성 하락에 영향을 미 쳤을 가능성이 높고, 낮아진 지역 산업 생산성이 지역 경제성장률 둔화에도 영향을 미칠 가능성 이 있다. 따라서 지역의 경제활력 저하 문제를 제고하기 위해서는 지역 산업구조 개편 문제와 생 산성 향상 방안에 대한 고민이 필요하다.
다발성 대장암 간전이 환자의 간절제를 위한 새로운 시도
주종우,김형철,임철완,신응진,조규석,유기원,송옥평,홍대식,박성진,조준희,이혜경,김희경,권계원,고은석 순천향의학연구소;Soonchunhyang Medical Research Institute 2004 Journal of Soonchunhyang Medical Science Vol.10 No.2
Multiple bilobar liver matastases (MBLM) are the main cause of low resectability in the colon cancer liver metastases. The authors experienced one case of initially non-resectable colon cancer liver metastases. He was curatively and safely treated with a two-stage hepatectomy using the new method of future remnant liver volume growing. A 54-year-old man was referred to our department with the sigmoid colon cancer combined with MBLM, which were checked in two small metastatic lesions in the left lobe and five large sized lesions in the right lobe in the computed tomogram (CT). A laparoscopic assisted anterior resection was primarily performed. We performed the 1^(st) stage hepatectomy 3 weeks after the colon resection. Intra-operative Ultrasonogram (US) found 9 small superficial metastatic lesions in the left lobe. All that lesions were completely removed by non-anatomical wedge resection. An occlusion ballon catheter was placed in the right portal vein through a small branch of the inferior mesenteric vein at that time. The future remnant liver volume was sufficiently increased 3 weeks after the 1^(st) hepatectomy. A right hepatectomy was safely performed 22 days after the 1^(st) hepatectomy. The patient received a regional chemotherapy (interleukin2 based immuno-chemotherapy through hepatic artery) for 4 months, then received 9 cycles of systemic chemotherapy (biweekly Oxaliplation, leucovorin, plus 5-fluorouracil) without any recurrence evidence.
[PA-0014] Detection of SNPs variations in the seed storage protein gene involved in β-conglycinin
Soo-Kwon Park(Soo-Kwon Park),Jung-Kyung Moon(Jung-Kyung Moon),Sang-Beom Lee(Sang-Beom Lee),Dool-Yi Kim(Dool-Yi Kim),Mi-Suk Seo(Mi-Suk Seo),Yu-Na Kim(Yu-Na Kim),Gyu-Tae Park(Gyu-Tae Park),June-Yeol Cho 한국육종학회 2022 한국육종학회 공동학술발표집 Vol.2022 No.-
Simplified thermally activated delayed fluorescence organic light-emitting diodes
Park, Chan Hyuk,Shim, Yong Sub,Park, Cheol Hwee,Jung, Sun-Gyu,Park, Young Wook,Ju, Byeong-Kwon Elsevier 2018 Optical Materials Vol.86 No.-
<P><B>Abstract</B></P> <P>Recently, after the first demonstration of efficient, thermally activated delayed fluorescence (TADF) organic light-emitting diodes (OLEDs), these devices have been widely investigated, and several new materials (hole and electron transport materials) have been reported. In this work, we demonstrate highly efficient TADF OLEDs with a simplified structure, and systematically characterize these partially evaluated reported materials; (4s,6s)–2,4,5,6,–tetra(9H–carbazol–9–yl)isophthalonitrile (4CzIPN) has been used as a TADF emissive dopant; the exciton blocking and carrier transport characteristics of 9,9′–Diphenyl–6–(9–phenyl–9H–carbazol–3–yl)–9H,9′H–3,3′–bicarbazole (Tris-PCz) and 2,7–bis(2,2′–bipyridin–5–yl)triphenylene (BPy-TP2) have been characterized and compared with those of other widely used well-known organic materials. The demonstrated simplified TADF OLEDs with a 4CzIPN doped single emissive layer showed a high peak external quantum efficiency and power efficiency of 18.6% and 31.5 lm/W, respectively.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The characteristics of Tris-PCz and BPy-TP2 were investigated. </LI> <LI> In a simplified structure, exciton blocking layer was also used as a transport layer. </LI> <LI> TADF OLEDs maintained high efficiency with the simplified structure. </LI> </UL> </P>
Kwon, Hyo-Eun,Kwon, Soon Jin,Park, Sung-Joon,Shin, Min Gyu,Park, Sang-Hee,Park, Min Sang,Park, Hosik,Lee, Jung-Hyun Elsevier 2019 Separation and purification technology Vol.212 No.-
<P><B>Abstract</B></P> <P>A high performance thin film composite (TFC) forward osmosis (FO) membrane was prepared using a hydrophilic polyacrylonitrile (PAN) support with a tailored structure <I>via</I> a newly devised, aromatic solvent (toluene)-based interfacial polymerization (TIP) technique. The use of toluene as the organic solvent promoted amine diffusion toward the organic phase and the subsequent reaction, leading to the formation of an ultrathin (highly permeable) and highly dense (highly selective) polyamide selective layer on the PAN support, which improved membrane performance. In addition, a relatively thin (∼80 μm) and finger-like porous support structure embedded with a nonwoven fabric was favorable for facilitating mass transport in the support. As a result, the TFC FO membrane prepared <I>via</I> TIP showed ∼2.1 times higher FO water flux and ∼68% lower specific salt flux than the membrane prepared <I>via</I> conventional aliphatic solvent-based interfacial polymerization (IP) in FO mode. Importantly, our TIP-assembled membrane exhibited superior FO performance over commercial and other lab-made membranes. Our strategy provides a facile solution to overcome the technical limitations of the conventional IP method by enabling the fabrication of high performance PA layers on hydrophilic supports, expanding the application spectrum of TFC membranes.</P> <P><B>Highlights</B></P> <P> <UL> <LI> TFC FO membranes are fabricated using aromatic organic solvents (toluene). </LI> <LI> An ultrathin and highly dense PA layer was formed on a hydrophilic PAN support. </LI> <LI> The prepared membranes show FO performance exceeding commercial membranes. </LI> <LI> This is due to high permeability and excellent selectivity of the prepared membrane. </LI> <LI> Aromatic solvent greatly promotes MPD diffusion by increased miscibility with water. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Whole genomic characterization of Korean porcine G8P[7] reassortant rotaviruses
Park, Jun-Gyu,Park, Sang-Ik,Woo, Nam-Il,Kim, Deok-Song,Seo, Ja-Young,Alfajaro, Mia Madel,Kim, Ji-Yun,Soliman, Mahmoud,Baek, Yeong-Bin,Cho, Eun-Hyo,Kwon, Joseph,Choi, Jong-Soon,Kang, Mun-Il,Matthijnsse Springer-Verlag 2016 Archives of virology Vol.161 No.10
<P>This study analyzed eleven genomic segments of three Korean porcine G8P[7] group A rotavirus (RVA) strains. Phylogenetically, these strains contained two bovine-like and nine porcine-like genomic segments. Eight genes (VP1, VP2, VP6 and NSP1-NSP5) of strains 156-1 and 42-1 and seven genes (VP1, VP2, VP6 and NSP2-NSP5) of strain C-1 clustered closely with porcine and porcine-like animal strains and distantly from typical human Wa-like strains. The VP3-M2 genotype of these strains clustered closely with bovine-like strains, but distantly with typical human DS-1-like strains. These data indicate that multiple reassortments involving porcine and bovine RVA strains in Korea must have occurred.</P>