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Science China Materials 2022年第4期65卷 1028-1033页

作者： Junsu ha Junseop Lim Jun Yeob Lee School of Chemical Engineering Sungkyunkwan University2066Seobu-roJangan-guSuwon-siGyeonggi-do16419Republic of Korea

An electron-transport-type host was synthesized using a benzo[4,5]furo[3,2-d]pyrimidine(bFP)core to develop a high triplet energy *** host was designed to have both the tetraphenylsilyl blocking group and the hole-transport-type carbazole *** the device application,the host was used as an electron-transport-type host mixed with a hole-transport-type 3,3'-di(9H-carbazol-9-yl)-1,1†-biphenyl(mCbP)host in the blue phosphorescent organic light-emitting diodes(PhO-LEDs)doped with a[[5-(1,1-dimethylethyl)-3-phenyl-1H-imidazo[4,5-b]pyrazin-1-yl-2(3H)-ylidene]-1,2-phenylene]bis-[[6-(1,1-dimethylethyl)-3-phenyl-1H-imidazo[4,5-b]pyrazin-1-yl-2(3H)-ylidene]-1,2-phenylene]iridium(Ir(cb)3)blue *** a result,the mCbP:CzbFPmSi mixed host showed high external quantum efficiency over 20%at 1000 cd m^(−2) and low efficiency roll-off in the blue PhOLEDs.

关键词： blue device host efficiency lifetime

ON THE ASYMPTOTIC DYNAMICS OF THE VLASOV-YUKAWA-bOLTZMANN SYSTEM NEAR VACUUM

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Acta Mathematica Scientia 2015年第4期35卷 887-905页

作者： Sun-Ho CHOI Seung-Yeal ha Department of Mathematical Sciences KAIST Department of Mathematical Sciences and Research Institute of Mathematics Seoul National University

In this pape,~ we study uniform L1-stability and asymptotic completeness of the Vlasov-Yukawa-boltzmann （V-Y-b） system. For a sufficiently small rand smooth initial data, we show that classical solutions exist globally and satisfy dispersion estimates, uniform L1-stability with respect to initial data and scattering type estimate. We show that the short range nature of interactions due to the Yukawa potential enables us to construct robust Lyapunov type functional to derive scattering states. In the zero mass limit of force carrier particles, we also show that the classical solutions to the V-Y-b system converge to that of the Vlasov-Poisson-boltzmann （V-P-b） system in any finite time interval

关键词： asymptotic completeness collision operator the Vlasov-Yukawa-boltzmannsystem uniform L1-stability

Hbx-induced reactive oxygen species activates hepatocellular carcinogenesis via dysregulation of PTEN/Akt pathway

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World Journal of Gastroenterology 2010年第39期16卷 4932-4937页

作者： Hye-Lin ha Dae-Yeul Yu Disease Model Research Laboratory Aging Research CenterKorea Research Institute of Bioscience and Biotechnology Department of Functional Genomics University of Science and Technology

AIM:To investigate the role of hepatitis b virus X-protein(Hbx)-induced reactive oxygen species(ROS)on liver carcinogenesis in Hbx transgenic mice and HepG2-Hbx ***:Cell growth rate was analyzed,and through western blotting,mitogenic signaling was *** ROS from wild and Hbx transgenic mice and HepG2-Mock and Hbx cells were assayed by *** of oxidized and reduced phosphatase and tensin homolog(PTEN)was analyzed through N-ethylmaleimide alkylation,nonreducing ***:We observed that the cell-proliferation-related phosphoinositide 3-kinase/Akt pathway is activated by Hbx in vivo and in *** ROS were detected by *** suppressor PTEN,via dephosphorylation of Akt,was oxidized and inactivated by increased *** oxidized PTEN activated the mitogenic pathway through over-activated ***,treatment with ROS scavenger N-acetyl cysteine can reverse PTEN to a reduced *** produced ROS also stimulated Hbx ***:Hbx induced ROS promoted Akt pathways via oxidized inactive *** and ROS maintained a positive regulatory loop,which aggravated carcinogenesis.

关键词： Hepatitis b virus X protein Hepatocellular carcinoma Akt Reactive oxygen species Phosphatase and tensin homolog

NEW WEIGHTED MULTILINEAR OPERATORS AND COMMUTATORS OF haRDY-CESàRO TYPE

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Acta Mathematica Scientia 2015年第6期35卷 1411-1425页

作者： ha Duy HUNG Luong Dang KY High School for Gifted Students hanoi National University of Education Applied Analysis Research Group Faculty of Mathematics and StatisticsTon Duc Thang University

This paper deals with a general class of weighted multilinear hardy-Cesaro op- erators that acts on the product of Lebesgue spaces and central Morrey spaces. Their sharp bounds are also obtained. In addition, we obtain sufficient and necessary conditions on weight functions so that the commutators of these weighted multilinear hardy-Cesaro oper- ators （with symbols in central bMO spaces） are bounded on the product of central Morrey spaces. These results extends known results on multilinear hardy operators.

关键词： hardy-Ces^ro operators hardy's inequality multilinear hardy operator weig-hted hardy-Littlewood averages

Exosomes as therapeutic drug carriers and delivery vehicles across biological membranes:current perspectives and future challenges

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Acta Pharmaceutica Sinica b 2016年第4期6卷 287-296页

作者： Dinh ha Ningning Yang Venkatareddy Nadithe Manchester University College of Pharmacy Natural & Health Sciences

Exosomes are small intracellular membrane-based vesicles with different compositions that are involved in several biological and pathological processes. The exploitation of exosomes as drug delivery vehicles offers important advantages compared to other nanoparticulate drug delivery systems such as liposomes and polymeric nanoparticles; exosomes are non-immunogenic in nature due to similar composition as body's own cells. In this article, the origin and structure of exosomes as well as their biological functions are outlined. We will then focus on specific applications of exosomes as drug delivery systems in pharmaceutical drug development. An overview of the advantages and challenges faced when using exosomes as a pharmaceutical drug delivery vehicles will also be discussed.

关键词： Exosomes Nanocarrier Extracellular vesicles Drug delivery systems

Effects of dietary supplementation of bacteriophage cocktail on health status of weanling pigs in a non-sanitary environment

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Journal of Animal Science and biotechnology 2023年第4期14卷 1661-1677页

作者： Yohan Choi Abdolreza Hosseindoust sang Hun ha Joeun Kim YeJin Min YongDae Jeong JunYoung Mun SooJin sa JinSoo Kim Swine Science Division National Institute of Animal ScienceRural Development AdministrationCheonan 31000Republic of Korea Department of Animal Industry Convergence Kangwon National UniversityChuncheon 24341Republic of Korea

background The study evaluated the effects of bacteriophage cocktail(bP)and ZnO administered during weaning time for piglets exposed to a non-sanitary *** bacteriophages were designed to eliminate Escherichia coli(K88,K99 and F41),salmonella(typhimurium and enteritidis),and Clostridium perfreingens(types A and C).Forty 21-day-old crossbreed piglets were assigned to four treatments,including the PC(sanitary environment),NC(nonsanitary environment),bP(NC plus 108 pfu/kg bP),and ZO(NC plus 2,500 mg/kg ZnO).Piglets in the NC,bP and ZO were kept in a non-sanitary environment for 14 d,which was contaminated with the feces of infected *** Pigs in the bP and ZO treatments had a higher final body weight compared with the *** NC treatment showed the highest concentration of inflammatory cytokines including interleukin(IL)-1β,IL-6 and tumor necrosis factor-αin the *** administration of bP and ZO showed lower myeloperoxidase concentrations compared with the *** NC treatment showed a lower concentration of superoxide dismutase in serum compared with the *** the treatments in non-sanitary environment,the NC treatment showed a higher concentration of malondialdehyde compared with the *** PC treatment showed a lower concentration of butyric acid in the feces compared with the bP *** non-sanitary treatments,the villus height in the duodenum was greater in the bP and ZO compared with the *** lower abundance of Proteobacteria phylum was observed in the bP and PC treatments compared with the *** highest relative abundance of Eubacterium was recorded in the bP *** abundance of Megasphaera and Schwartzia was higher in the NC pigs compared with the bP *** abundance of Desulfovibrio was lower in the supplemented treatments(bP and ZO)compared with non-supplemented(NC and PC).The abundance of Cellulosilyticum genera was higher in the bP and ZO treatments rather than in the *** piglets in the NC treatment had the

关键词： Antioxidant Cytokines Diarrhea Fecal score Inflammation Microbiota Proteobacteria

Suzuki Reaction of Aryl bromides Using a Phosphine-Free Magnetic Nanoparticle-Supported Palladium Catalyst

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催化学报 2011年第11期32卷 1667-1676页

作者： Nghia T. bUI Trung b. DANG ha V. LE Nam T. S. PhaN Department of Chemical Engineering HCMC University of Technology VNU-HCM 268 Ly Thuong Kiet Distriet 10 Ho Chi Minh City Viet Nam

A palladium catalyst immobilized on superparaganetic nanoparticles was prepared with a palladium loading of 0.30 mmol/g. The catalyst was characterized using X-ray diffraction, scanning electron microscopy, transmission electron microscopy, vibrating sample magnetometry, thermogravimetric analysis, Fourier transform infrared, atomic absorption spectrophotometry, and nitrogen adsorption. The immobilized palladium catalyst was an efficient catalyst without added phosphine ligands for the Suzuki cross-coupling reaction of several aryl bromides with phenylboronic acid. The recovery of catalyst was simply by magnetic decantation in the presence of a magnet. The immobilized palladium catalyst can be reused many times without significant degradation in catalytic activity. No leaching of active palladium species into the reaction solution was detected.

关键词： superparamagnetic nanoparticle Suzuki reaction palladium aryl bromide

Effect of a seasonal diffuse pollution migration on natural organic matter behavior in a stratified dam reservoir

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Journal of Environmental Sciences 2010年第6期22卷 908-914页

作者： Soon Ju Yu Jae Yil Lee Sung Ryong ha National Institute of Environmental Research Department of Urban Engineering Chungbuk National University

This article aims to describe the influence of diffuse pollution on the temporal and spatial characteristics of natural organic matter （NOM） in a stratified dam reservoir, the Daecheong Dam, on the basis of intensive observation results and the dynamic water quality simulation using CE-QUAL-W2. Turbidity is regarded as a comprehensive representation of allochothonous organic matter from diffuse sources in storm season because the turbidity concentration showed reasonable significance in a statistical correlation with the UV absorbance at 254 nm and total phosphorus. CE-QUAL-W2 simulation results showed good consistency with the observed data in terms of dissolved organic matter （DOM） including refractory dissolved organic carbon （RDOC） and labile DOC and also well explained the internal movement of constituents and stratification phenomenon in the reservoir. Instead turbidity and NOM were related well in the upper region of the reservoir according to flow distance, gradually as changing to dissolved form of organic matter, RDOM affected organic matter concentration of reservoir water quality compared to turbidity. To control the increase of soluble organic matters in the dam reservoir, appropriate dam water discharge gate operation provided effective measurement. because of the gate operation let avoid the accumulation of organic matter within a dam reservoir by shorten of turbid regime retention time.

关键词： CE-QUQL-W2 natural organic matter stratified dam reservoir turbidity flow

Predicting Concrete Compressive Strength Using Deep Convolutional Neural Network based on Image Characteristics

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Computers, Materials & Continua 2020年第10期65卷 1-17页

作者： sanghyo Lee Yonghan Ahn ha Young Kim Division of Architecture and Civil Engineering Kangwon National UniversitySamcheok-si25913Korea School of Architecture and Architectural Engineering Hanyang University ERICAAnsan-si15588Korea Graduate School of Information Yonsei UniversitySeoul03722Korea

In this study,we examined the efficacy of a deep convolutional neural network(DCNN)in recognizing concrete surface images and predicting the compressive strength of concrete.A digital single-lens reflex(DSLR)camera and microscope were simultaneously used to obtain concrete surface images used as the input data for the ***,training,validation,and testing of the DCNNs were performed based on the DSLR camera and microscope image *** of the analysis indicated that the DCNN employing DSLR image data achieved a relatively higher *** accuracy of the DSLR-derived image data was attributed to the relatively wider range of the DSLR camera,which was beneficial for extracting a larger number of ***,the DSLR camera procured more realistic images than the ***,when the compressive strength of concrete was evaluated using the DCNN employing a DSLR camera,time and cost were reduced,whereas the usefulness ***,an indirect comparison of the accuracy of the DCNN with that of existing non-destructive methods for evaluating the strength of concrete proved the reliability of DCNN-derived concrete strength *** addition,it was determined that the DCNN used for concrete strength evaluations in this study can be further expanded to detect and evaluate various deteriorative factors that affect the durability of structures,such as salt damage,carbonation,sulfation,corrosion,and freezing-thawing.

关键词： Deep convolutional neural network(DCNN) non-destructive testing(NDT) concrete compressive strength digital single-lens reflex(DSLR)camera microscope

A voltage-controlled chaotic oscillator based on carbon nanotube field-effect transistor for low-power embedded systems

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Chinese Physics b 2014年第5期23卷 617-622页

作者： Van ha Nguyen Wonkyeong Park Namtae Kim hanjung Song Department of Nano Systems Engineering Inje University Department of Electronics Engineering Inje University Center for Nano Manufacturing Inje University

This paper presents a compact and low-power-based discrete-time chaotic oscillator based on a carbon nanotube field-effect transistor implemented using Wong and Deng＇s well-known model. The chaotic circuit is composed of a nonlinear circuit that creates an adjustable chaos map, two sample and hold cells for capture and delay functions, and a voltage shifter that works as a buffer and adjusts the output voltage for feedback. The operation of the chaotic circuit is verified with the SPICE software package, which uses a supply voltage of 0.9 V at a frequency of 20 kHz. The time series, frequency spectra, transitions in phase space, sensitivity with the initial condition diagrams, and bifurcation phenomena are presented. The main advantage of this circuit is that its chaotic signal can be generated while dissipating approximately 7.8 μW of power, making it suitable for embedded systems where many chaos-signal generators are required on a single chip.

关键词： chaos generator carbon nanotube field-effect transistor bifurcation random noise generator