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Short-range scattering of Hartree type fractional NLS
Academic Press 2017 Journal of differential equations Vol.262 No.1
<P>In this paper we consider scattering problem for Hartree type fractional NLS with vertical bar del vertical bar(alpha) (1 < alpha < 2) and potential V similar to vertical bar x vertical bar(-gamma). We show small data scattering in a weighted space for the short range 6-2 alpha/4-alpha < gamma < 2. The difficulty arises from the non-locality and non-smoothness of vertical bar del vertical bar(alpha). To overcome it we utilize the method of commutator estimate based on Balakrishnan's formula. (C) 2016 Elsevier Inc. All rights reserved.</P>
The distribution, characteristics and utilization of Korean native Actinidia Genus
Cho, Y.,Cho, H.,Park, M. Korean Association of Organic Agriculture 2011 韓國有機農業學會誌 Vol.19 No.S
A. arguta is found nationwide whether the altitude is low or high if good drainage is achieved with plenty of water. The distribution of A. polygama seems to be more limited to higher altitude than A. arguta so it can be found in deep valley of highland even in Mt. Halla. A. kolomikta seems rather limited to colder area than A. arguta to Mt. Jiri to the south. Meanwhile, A. rufa is very confined to southern islands including Jeollanamdo and Jeju islands. Some institutes still continue to utilize Korean native Actinidia plants commercially since early 1980's. More collaborative efforts are needed for further development of these plants nationwide.
Cho, Y.,Kim, S.,Pyo, S.,Park, Y.S.,Kim, S.J.,Yun, H.,Do, J. Pergamon Press 2010 Polyhedron Vol.29 No.9
The solvothermal synthesis and crystal structures of two new lead(II) compounds, bis(ethylenediamine)lead(II) chloride, Pb(en)<SUB>2</SUB>l<SUB>2</SUB> and mono(ethylenediamine)lead(II) chloride, Pb(en)Cl<SUB>2</SUB>, are reported. A detailed comparison of the two structures is given. In 1, the Pb(II) center is coordinated by two chlorine atoms and four nitrogen atoms from three en ligands, which act as either chelating or bridging ligands, allowing links to other Pb(II) centers. This creates an infinite linear chain of Pb(en)<SUB>2</SUB>l<SUB>2</SUB> In 2, the Pb(II) center is chelated by one en ligand and is coordinated by six chlorine atoms, including two unusually weak Pb-Cl bonds (>3.5A) connected through μ<SUB>2</SUB> and μ<SUB>4</SUB>Cl to build a neutral layer of Pb(en)Cl<SUB>2</SUB>units. Complex 1 contains a hemidirected Pb(II), while complex 2 has a (pseudo-)hemidirected Pb(II). TGA and high-temperature controlled powder-XRD studies show that compound 1 decomposes to compound 2 near 150<SUP>o</SUP>, and finally to PbCl<SUB>2</SUB>above 320<SUP>o</SUP>
Cho, Y.,Lee, S.E.,Lee, H.C.,Hur, J.,Lee, S.,Youn, S.W.,Lee, J.,Lee, H.J.,Lee, T.K.,Park, J.,Hwang, S.J.,Kwon, Y.W.,Cho, H.J.,Oh, B.H.,Park, Y.B.,Kim, H.S. Elsevier Biomedical 2011 JOURNAL OF THE AMERICAN COLLEGE OF CARDIOLOGY - Vol.57 No.1
Objectives: We investigated the effects of human resistin on atherosclerotic progression and clarified its underlying mechanisms. Background: Resistin is an adipokine first identified as a mediator of insulin resistance in murine obesity models. But, its role in human pathology is under debate. Although a few recent studies suggested the relationship between resistin and atherosclerosis in humans, the causal relationship and underlying mechanism have not been clarified. Methods: We cloned rabbit resistin, which showed 78% identity to human resistin at the complementary deoxyribonucleic acid level, and its expression was examined in 3 different atherosclerotic rabbit models. To evaluate direct role of resistin on atherosclerosis, collared rabbit carotid arteries were used. Histological and cell biologic analyses were performed. Results: Rabbit resistin was expressed by macrophages of the plaque in the 3 different atherosclerotic models. Peri-adventitial resistin gene transfer induced macrophage infiltration and expression of various inflammatory cytokines, resulting in the acceleration of plaque growth and destabilization. In vitro experiments elucidated that resistin increased monocyte-endothelial cell adhesion by upregulating very late antigen-4 on monocytes and their counterpart vascular cell adhesion molecule-1 on endothelial cells. Resistin augmented monocyte infiltration in collagen by direct chemoattractive effect as well as by enhancing migration toward monocyte chemotactic protein-1. Administration of connecting segment-1 peptide, which blocks very late antigen-4 x vascular cell adhesion molecule-1 interaction, ameliorated neointimal growth induced by resistin in vivo. Conclusions: Our results indicate that resistin aggravates atherosclerosis by stimulating monocytes, endothelial cells, and vascular smooth muscle cells to induce vascular inflammation. These findings provide the first insight on the causal relationship between resistin and atherosclerosis.
Enhanced energy harvesting based on surface morphology engineering of P(VDF-TrFE) film
Cho, Y.,Park, J.B.,Kim, B.S.,Lee, J.,Hong, W.K.,Park, I.K.,Jang, J.E.,Sohn, J.I.,Cha, S.,Kim, J.M. Elsevier 2015 Nano energy Vol.16 No.-
Polyvinylidene fluoride (PVDF) has great potential for its use as an energy harvesting material as it exhibits not only outstanding piezoelectric and electrostatic characteristics resulting from ferroelectric effects, but also remarkably robust stability against repeated mechanical stress compared to inorganic materials. We report enhanced performances of poly(vinylidenefluoride-co-trifluoroethylene) (P(VDF-TrFE)) based energy generators with wider range of selections of flexible substrates through a surface morphology engineering using solvent annealing method as the key technology for simple and cost-effective fabrication at room temperature. It is clearly revealed that a solvent annealed P(VDF-TrFE) film is crystallised at room temperature and that the surface morphology is changed from a rough surface into a smooth and flat surface with increasing annealing time. This surface morphology engineering results in 8 times enhanced output voltage and current of the energy generators because of well-aligned electrical dipoles. We also demonstrate a highly transparent and flexible energy generator by employing graphene electrodes with the solvent annealed P(VDF-TrFE) film, which can be effectively harvesting various mechanical energy sources.
Cho, Y.,Lee, W.,Kim, H. Royal Society of Chemistry 2014 Journal of materials chemistry. A, Materials for e Vol.2 No.30
A novel synthetic process referred to as a protective coating method was developed for the fabrication of a carbon-supported Pt2Ni1 nanoparticle measuring approximately 5 nm in size with a Pt-rich shell via thermal treatment. A 3 to 5 nm thick potypyrrole layer encapsulating the surface of the Pt/C catalyst simultaneously acted as a sponge to absorb the Ni precursor and a physical barrier to inhibit the inevitable increase in particle size during the thermal treatment. The PPy layer does not behave as a poison to the catalyst because it is completely decomposed without carbonization on the Pt surface during the heat treatment in a H-2-Ar mixture. As a result, the resultant Pt2Ni1/C catalyst with a Pt-rich shell exhibited improved stability under acidic conditions and catalytic activity in an oxygen reduction reaction.
Challenges of organic rice farming in Jeonnam Province, Korea
Cho, Y.,Nicholas, P.,Lee, J. Korean Association of Organic Agriculture 2011 韓國有機農業學會誌 Vol.19 No.S
The production practices, productivity and economic performance of organic and non-chemical rice farming were compared in Jeonnam Province, Korea. Korean organic rice farming showed a lack of use of resistant varieties and rotational cropping systems as well as less use of farm wastes and a high dependency upon external inputs. When compared with no-chemical rice production practices very little differences were found. However, organic rice farming showed 15% to 18% higher profits than no-chemical farming even though the productivity was arguably similar between the two farming types. This may encourage more farmers to convert to organic production rather than non-chemical farming as the farming practices are very similar, thereby resulting in increased supply of organic products and decreased prices for organic rice near future. There is a need to more greatly differentiate organic farming practices and products from those of no-chemical farming.