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Search for light tetraquark states in ϒ(1S) and ϒ(2S) decays
Jia, S.,Shen, C. P.,Yuan, C. Z.,Adachi, I.,Ahn, J. K.,Aihara, H.,Al Said, S.,Asner, D. M.,Atmacan, H.,Aushev, T.,Ayad, R.,Babu, V.,Badhrees, I.,Bahinipati, S.,Bakich, A. M.,Bansal, V.,Behera, P.,Berge American Physical Society 2017 Physical review. D Vol.96 No.11
<P>We search for the J(PC) = 0(--) and 1(+-) light tetraquark states with masses up to 2.46 GeV/c(2) in gamma(1S) and gamma(2S) decays with data samples of (102 +/- 2) million and (158 +/- 4) million events, respectively, collected with the Belle detector. No significant signals are observed in any of the studied production modes, and 90% credibility level (C. L.) upper limits on their branching fractions in Upsilon(1S) and Upsilon(2S) decays are obtained. The inclusive branching fractions of the Upsilon(1S) and Upsilon(2S) decays into final states with f(1)(1285) are measured to be B(Upsilon(1S) -> f(1)(1285) + anything) = (46 +/- 28(stat) +/- 13(syst)) x 10(-4) and B(Upsilon(2S) -> f(1)(1285) + anything) = (22 +/- 15(stat) +/- 6.3(syst)) x 10(-4). The measured chi(b2) -> J/Psi + anything branching fraction is measured to be (1.50 +/- 0.34(stat) +/- 0.22(syst)) x 10(-3), and 90% C. L. upper limits for the chi(b0;b1) -> J/Psi + anything branching fractions are found to be 2.3 x 10(-3) and 1.1 x 10(-3), respectively. For B(chi(b1) -> omega + anything), the branching fraction is measured to be (4.9 +/- 1.3(stat) +/- 0.6(syst) x 10(-2). All results reported here are the first measurements for these modes.</P>
Jia-Bao Yan,J.Y. Richard Liew,Min-Hong Zhang 국제구조공학회 2015 Steel and Composite Structures, An International J Vol.18 No.4
Ultra-lightweight cement composite (ULCC) with a compressive strength of 60 MPa and density of 1,450 kg/㎥ has been developed and used in the steel-concrete-steel (SCS) sandwich structures. This paper investigates the structural performances of SCS sandwich composite beams with ULCC as filled material. Overlapped headed shear studs were used to provide shear and tensile bond between the face plate and the lightweight core. Three-dimensional nonlinear finite element (FE) model was developed for the ultimate strength analysis of such SCS sandwich composite beams. The accuracy of the FE analysis was established by comparing the predicted results with the quasi-static tests on the SCS sandwich beams. The FE model was also applied to the nonlinear analysis on curved SCS sandwich beam and shells and the SCS sandwich beams with J-hook connectors and different concrete core including ULCC, lightweight concrete (LWC) and normal weight concrete (NWC). Validations were also carried out to check the accuracy of the FE analysis on the SCS sandwich beams with J-hook connectors and curved SCS sandwich structure. Finally, recommended FE analysis procedures were given.
Jia-Bao Yan,J.Y. Richard Liew,Min-Hong Zhang,Junyan Wang 국제구조공학회 2014 Steel and Composite Structures, An International J Vol.17 No.6
Ultra-lightweight cement composite (ULCC) with a compressive strength of 60 MPa and density of 1450 kg/m³ has been developed and used in the steel-concrete-steel (SCS) sandwich structures. ULCC was adopted as the core material in the SCS sandwich composite beams to reduce the overall structural weight. Headed shear studs working in pairs with overlapped lengths were used to achieve composite action between the core material and steel face plates. Nine quasi-static tests on this type of SCS sandwich composite beams were carried out to evaluate their ultimate strength performances. Different parameters influencing the ultimate strength of the SCS sandwich composite beams were studied and discussed. Design equations were developed to predict the ultimate resistance of the cross section due to pure bending, pure shear and combined action between shear and moment. Effective stiffness of the sandwich composite beam section is also derived to predict the elastic deflection under service load. Finally, the design equations were validated by the test results.
Jia, Y.,Wu, C.,Kim, J.,Kim, B.,Lee, S.J. Butterworths ; Elsevier Science Ltd 2016 The Journal of nutritional biochemistry Vol.28 No.-
<P>We have previously reported that astaxanthin (AX), a dietary carotenoid, directly interacts with peroxisome proliferator-activated receptors PPAR alpha and PPAR gamma, activating PPAR alpha while inhibiting PPAR gamma, and thus reduces lipid accumulation in hepatocytes in vitro. To investigate the effects of AX in vivo, high-fat diet (HFD)-fed C57BL/6J mice were orally administered AX (6 or 30 mg/kg body weight) or vehicle for 8 weeks. AX significantly reduced the levels of triglyceride both in plasma and in liver compared with the control HFD mice. AX significantly improved liver histology and thus reduced both steatosis and inflammation scores of livers with hematoxylin and eosin staining. The number of inflammatory macrophages and Kupffer cells were reduced in livers by AX administration assessed with F4/80 staining. Hepatic PPAR alpha-responsive genes involved in fatty acid uptake and beta-oxidation were upregulated, whereas inflammatory genes were downregulated by AX administration. In vitro radiolabeled assays revealed that hepatic fatty acid oxidation was induced by AX administration, whereas fatty acid synthesis was not changed in hepatocytes. In mechanism studies, AX inhibited Akt activity and thus decreased SREBP1 phosphorylation and induced Insig-2a expression, both of which delayed nuclear translocation of SREBP1 and subsequent hepatic lipogenesis. Additionally, inhibition of the Akt-mTORC1 signaling axis by AX stimulated hepatic autophagy that could promote degradation of lipid droplets. These suggest that AX lowers hepatic lipid accumulation in HFD-fed mice via multiple mechanisms. In addition to the previously reported differential regulation of PPAR alpha and PPAR gamma, inhibition of Akt activity and activation of hepatic autophagy reduced hepatic steatosis in mouse livers. (C) 2015 Elsevier Inc. All rights reserved.</P>
Jia, Yuefa,Wu, Changjin,Kim, Deok-Hyeon,Lee, B.W.,Rhee, S.J.,Park, Yun Chang,Kim, Chul Sung,Wang, Q.J.,Liu, Chunli Elsevier 2018 CHEMICAL ENGINEERING JOURNAL -LAUSANNE- Vol.337 No.-
<P><B>Abstract</B></P> <P>In the present work, N doped BiFeO<SUB>3</SUB> (N-BFO) nanoparticles have been synthesized via a sol-gel rapid calcination technique using melamine (C<SUB>3</SUB>H<SUB>6</SUB>N<SUB>6</SUB>) as the N precursor. It is found that N-doping could effectively narrow the band gap of BFO, which obviously enhanced the visible light adsorption capability. Meanwhile, N-doping could lead to significant increase in the magnetization of BFO. Particularly, the saturation magnetization (<I>M<SUB>s</SUB> </I>) was increased up to 0.35 emu/g (as compared to that of pure BFO: 0.07 emu/g) when 12.5 mmol N doping precursor was used (12.5N-BFO). The catalytic performance of N-BFO nanoparticles was evaluated through the degradation of bisphenol A (BPA) under visible light irradiation. 12.5N-BFO was found to be an efficient catalyst of BPA, and the addition of H<SUB>2</SUB>O<SUB>2</SUB> (10 mmol/L) or H<SUB>2</SUB>O<SUB>2</SUB> (10 mmol/L)/<SMALL>L</SMALL>-cysteine (0.25 mmol/L) can further enhance the degradation efficiency up to 60% and 94% within 120 min, respectively. The 12.5N-BFO nanoparticles were very stable during photocatalytic processes and their photo-Fenton catalytic activity can be retained even after three recycling processes.</P> <P><B>Highlights</B></P> <P> <UL> <LI> N doped BiFeO<SUB>3</SUB> have been synthesized using melamine as the N precursor. </LI> <LI> The band gap and saturation magnetization of N doped BiFeO<SUB>3</SUB> is tunable. </LI> <LI> N doped BiFeO<SUB>3</SUB>/H<SUB>2</SUB>O<SUB>2</SUB> shows enhanced efficient degradation of bisphenol A. </LI> <LI> Addition of <SMALL>L</SMALL>-cysteine can further enhanced photodegradation performance. </LI> <LI> A mechanism of bisphenol A degradation was proposed. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Study of optical and electrical properties of TiO2/Ag/TiO2 multilayers
J. H. Jia,L. Y. Chen,H. Xie,H. Y. You,J. Li,P. Zhou 한국물리학회 2004 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.44 No.32
Optical and electrical properties of TiO2/Ag/TiO2 multilms prepared by a multi-target sputtering method were investigated. The transmittance spectra and the sheet resistance as a function of layer thickness were carefully measured and analyzed. By properly adjusting the thickness of the metal and dielectric lms, a low sheet resistance of 30 Ohms/sq. and a high transmittance of over 90 % in the 500-700 nm wavelength region were achieved. It was found that a Ag layer played a significant role in determining the optical and electrical properties of the film structure.
Search for Ω(2012)→KΞ(1530)→KπΞ at Belle
Jia, S.,Shen, C. P.,Adachi, I.,Ahn, J. K.,Aihara, H.,Al Said, S.,Asner, D. M.,Aushev, T.,Ayad, R.,Babu, V.,Bahinipati, S.,Bakich, A. M.,Behera, P.,Beleñ,o, C.,Bennett, J.,Berger, M.,Bhardwaj, V. American Physical Society 2019 Physical review. D Vol.100 No.3
Search for the 0−− glueball in ϒ(1S) and ϒ(2S) decays
Jia, S.,Shen, C. P.,Yuan, C. Z.,Adachi, I.,Aihara, H.,Al Said, S.,Asner, D. M.,Aushev, T.,Ayad, R.,Babu, V.,Badhrees, I.,Bakich, A. M.,Bansal, V.,Barberio, E.,Behera, P.,Bhuyan, B.,Biswal, J.,Bonvicin American Physical Society 2017 Physical Review D Vol.95 No.1
<P>We report the first search for the J(PC) = 0(--) glueball in Upsilon(1S) and Upsilon(2S) decays with data samples of (102 +/- 2) x 10(6) and (158 +/- 4) x 10(6) events, respectively, collected with the Belle detector. No significant signals are observed in any of the proposed production modes, and the 90% credibility level upper limits on their branching fractions in Upsilon(1S) and Upsilon(2S) decays are obtained. The inclusive branching fractions of the Upsilon(1S) and Upsilon(2S) decays into final states with chi(c1) are measured to be B(Upsilon(1S) -> chi(c1) + anything) = (1.90 +/- 0.43(stat) +/- 0.14(syst) x 10(-4) with an improved precision over prior measurements and B Upsilon(2S) -> chi(c1) + anything) = (2.24 +/- 0.44(stat) +/- 0.20(syst) x 10(-4) for the first time.</P>
Kim, J.W.,Yang, H.J.,Oel, A.,Brooks, M.,Jia, L.,Plachetzki, D.,Li, W.,Allison, W.,Swaroop, A. Cell Press 2016 DEVELOPMENTAL CELL Vol.37 No.6
<P>Vertebrate ancestors had only cone-like photoreceptors. The duplex retina evolved in jawless vertebrates with the advent of highly photosensitive rod-like photoreceptors. Despite cones being the arbiters of high-resolution color vision, rods emerged as the dominant photoreceptor in mammals during a nocturnal phase early in their evolution. We investigated the evolutionary and developmental origins of rods in two divergent vertebrate retinas. In mice, we discovered genetic and epigenetic vestiges of short-wavelength cones in developing rods, and cell-lineage tracing validated the genesis of rods from S cones. Curiously, rods did not derive from S cones in zebrafish. Our study illuminates several questions regarding the evolution of duplex retina and supports the hypothesis that, in mammals, the S-cone lineage was recruited via the Maf-family transcription factor NRL to augment rod photoreceptors. We propose that this developmental mechanism allowed the adaptive exploitation of scotopic niches during the nocturnal bottleneck early in mammalian evolution.</P>