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Ko Jun Hyeok,Han Taeman,Lee Seungwhan,이원훈 한국응용곤충학회 2024 Journal of Asia-Pacific Entomology Vol.27 No.1
A taxonomic review of the genus Periphyllus in South Korea is presented. This genus is represented by eight species in South Korea, including a new species, Periphyllus peninsula sp. n., collected from Acer pseudosie boldianum (Pax) Kom. Samples of aphids were collected from Acer spp. from several regions of South Korea, processed, preserved and studied using microscopic and photographic observations. Descriptions and illustra tions of the eight species and a revised key for the identification of the new Korean species of Periphyllus are provided.
( Jun Hyeok Seo ),( Bok Soo Ko ),( Band Sung Mingbae ) 한국품질경영학회 2014 한국품질경영학회 학술대회 Vol.2014 No.2
To formulate strategies for small and medium-sized manufacturing enterprises (SMEs) in response to the enforcement of the product liability (PL) law, factors that influence the enforcement of the PL law were identified through a political, economic, social, and technological (PEST) analysis. Furthermore, the relative importance was proposed for each area through a strengths, weaknesses, opportunities, and threats analytic hierarchy process (SWOT-AHP) analysis of the identified factors. In order to identify the relative importance of each area, a pairwise analysis was conducted through a questionnaire survey targeting experts in businesses related to PL. The results suggest the greater importance of opportunities and strengths than threats and weaknesses, indicating that the enforcement of the PL law would provide SMEs more opportunities than burdens. Through these results the S/O, S/T, W/O, W/T strategies for SMEs, which can be preferentially implemented, were proposed.
Ko, Museok,Lee, Yeoryang,Jo, Youngjoo,Jang, Jun Hyeok,Lee, Mi Jung Elsevier 2019 APPLIED SURFACE SCIENCE - Vol.481 No.-
<P><B>Abstract</B></P> <P>In this study, organic field-effect transistors (OFETs) using a naphthalene dicarboxamide (NDI)-based n-type semiconducting polymer and electrodes comprising either Au or reduced graphene oxide (rGO) were fabricated. Compared with those with Au electrodes, transistors with rGO electrodes exhibited enhanced hole transport characteristics. The analysis of the interaction between the NDI-based polymer and the two electrodes revealed satisfactory hole transport in terms of device performance with the rGO electrode despite the less favorable work function for the injection of holes into the polymer semiconductor, corresponding to the formation of interfacial dipoles of different magnitudes. The electron orbital structure of the rGO electrode induced a smaller shift by the dipole moment at the interface between the electrode and semiconductor compared with that induced by the electron orbital structure of the gold electrode to promote ambipolarity. In both cases, energy barriers for the injection of charge at the interface were determined by ultraviolet photoelectron spectroscopy and Kelvin probe force microscopy analysis. In addition, a complementary logic inverter comprising two identical OFETs based on n-type NDI derivative and rGO electrodes with improved hole transport properties was fabricated.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Reduced graphene oxide electrodes enhance hole transport characteristics in n-type semiconducting polymer. </LI> <LI> Interfacial dipole measured by ultraviolet photoelecton spectroscopy to push-back effect of molecular orbitals. </LI> <LI> Complementary inverter was developed to prove the ambipolarity. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>Enhanced hole transport in n-type semiconducting polymers with reduced graphene oxide contact electrode compared to that with gold electrode was analyzed.</P> <P>[DISPLAY OMISSION]</P>
Plant visiting insect inventories in the major arboreta in Korea
Jun-Min Seo,Shin-Gu Kang,Kee-Hwa Bae,Jong-Woo Nam,Jae-Ho Ko,Ju-Hee Lee,Ji-Young Lee,Jae-In Oh,Sang-Yoon Kim,June-Hyeok Jeong,So-Yeon Kim,Soo-Jeong Park,Dong-Myoung Kim,Jin-Sung Kweon,Bong-Kyu Byun 한국응용곤충학회 2022 한국응용곤충학회 학술대회논문집 Vol.2022 No.04