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Synthesis and characterization of Cu-Pt/MWCNTs for use in electrocatalytic applications

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Particuology 2011年第5期9卷 522-527页

作者： Yuh-Jing Chiou Hang-Jui hsu Hong-Ming Lin Wei-Jen Liou Huey-wen Liou She-Huang Wu Shu-Hua Chien Department of Materials Engineering Tatung University 40 Chungshan N. Rd. 3rd Sec 104 Taipei Taiwan China Institute of Chemistry Academia Sinica 128Academia Road Sec. 2 Nankang 115 Taipei Taiwan China

Improving catalyst performance by studying the preparation parameters, material structures and analysis methods is important work for catalyst researchers. In this study, Cu-Pt nanocomposites with different metal ratios were synthesized on MWCNTs using a polyol method. The structures and morphologies of the nano hybrid catalysts were analyzed by XRD and TEM. The XRD results indicate that Pt and Cu formed a bimetallic solid solution. The average diameters of the Pt and Cu-Pt nanoparticles on MWCNTs were between 3-10 nm and 5-15 nm, respectively. The electrocatalytic behavior of methanol oxidation reactions was investigated by cyclic voltammery （CV）. Cu（20%）/[Pt/MWCNTs（1：4）], which contained an optimal degree of solid solution, enhanced the methanol oxidation to the greatest degree.

关键词： Electrocatalysis Methanol Multi-walled carbon nanotubes NanoparticlesPlatinumCopper

Sun, climate, hunger, and mass migration

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Science China Earth Sciences 1998年第5期41卷 449-472页

作者： KennethJ.hsu 1. Tarim Associates AG Frohburgstrasse 96 8006 Zurich Switzerland

Paleoclimatic studies indicate four epochs of global cooling during the last 4 000 years, i.e. during the few centuries before and after 2000 BC, 800 BC, 400 AD, and 1 600 AD; the quasiperiodicity corresponds to cyclic variation of solar activity. Global temperature changes influenced regional precipitation patterns: Northern Europe was wetter while the middle and low latitude lands were more arid during colder epochs. Both sets of cold climatical conditions were unfavorable for agricultural production. Historical records show that large demographic movements in history took place because of crop failures and mass starvation, rather than escaping from war zones. The "wandering" of the Germanic tribes during the first two or three centuries of the Christian Era is one example. Whereas the accelerated release of carbon dioxide from the burning of fossil fuels is ultimately to cause global warming, historical evidence indicates, however, that global warming has been on the whole a blessing to mankind. Global cooling, on the other hand, has curtailed agricultural production and has led to famines and mass migrations of people. Perhaps the most important task at the present is not so much computer modelling of greenhouse effect on global climate, but water management and agricultural researches to insure food supply for an everincreasing world population.

关键词： sun climate hunger mass migration.

MULTIPLE POSITIVE SOLUTIONS FOR QUASILINEAR ELLIPTIC PROBLEMS INVOLVING CONCAVE-CONVEX NONLINEARITIES AND MULTIPLE HARDY-TYPE TERMS

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Acta Mathematica Scientia 2013年第5期33卷 1314-1328页

作者： Tsing-San hsu Center for General Education Chang Gung University

In this paper, we deal with the existence and multiplicity of positive solutions for the quasilinear elliptic problem -△pu-∑i=1^kμi｜u｜^p-2/｜x-ai｜p^u=｜u｜^p^＊-2u＋λ｜u｜^q-2u,x∈Ω,where Ω belong to R^N（N ≥ 3） is a smooth bounded domain such that the different points ai∈Ω,i= 1,2,...,k,0≤μi〈μ^-=（N-p/p）^p,λ〉0,1≤q〈p,and p^＊=p^N/*** results depend crucially cn the parameters λ,q and μi for i=1,2,...,k.

关键词： multiple positive solutions concave-convex nonlinearities multiple Hardy- type terms

Quark confinement, new cosmic expansion and general Yang-Mills symmetry

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Chinese Physics C 2017年第1期41卷 115-122页

作者： Jong-Ping hsu Department of Physics University of Massachusetts Dartmouth North Dartmouth MA 02747-2300 USA

We discuss a unified model of quark confinement and new cosmic expansion with linear potentials based on a general（SU3）color×（U1）baryon symmetry. The phase functions in the usual gauge transformations are generalized to new ‘action integrals＇. The general Yang-Mills transformations have group properties and reduce to usual gauge transformations in special cases. Both quarks and ‘gauge bosons＇ are permanently confined by linear potentials. In this unified model of particle-cosmology, physics in the largest cosmos and that in the smallest quark system appear to both be dictated by the general Yang-Mills symmetry and characterized by a universal length. The basic force between two baryons is independent of distance. However, the cosmic repulsive force exerted on a baryonic supernova by a uniform sphere of galaxies is proportional to the distance from the center of the sphere. The new general YangMills field may give a field-theoretic explanation of the accelerated cosmic expansion. The prediction could be tested experimentally by measuring the frequency shifts of supernovae at different distances.

关键词： general Yang-Mills symmetry particle-cosmology confining quark potentials accelerated expansion

Catalytic activity correlation of Ni(Ⅱ),Co(Ⅱ) and Pd(Ⅱ) complexes to metal atom net charge

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Science China Chemistry 2009年第1期52卷 48-55页

作者： hsu Shaw Ling Department of Polymer Science and Engineering University of Massachusetts Amherst

The metal atom net charge correlation(MANCC) method was developed in prediction of catalyst activity of asymmetric late-transition metal complexes,2-quinoxalinyl-6-iminopyridine Ni(Ⅱ),2-imino-1,10-phenanthroline Co(Ⅱ) and 2-methoxycarbonyl-6-iminopyridine Pd(Ⅱ) complexes,from the net charge of the metal atom for ethylene *** force field was modified according to the X-ray diffraction *** found that the asymmetric structure of the complexes resulted in a charge differ-ence between two halogen atoms coordinated to the metal *** order to remove such contribution we introduced the effective charge Qeff,which was obtained by the charge equilibration(QEq) *** results verified the successful introduction of Qeff and showed that the catalytic activities of different complexes are related to central metal atom effective charge.

关键词： asymmetric catalyst effective charge force field MANCC QEq

A model of unified quantum chromodynamics and Yang-Mills gravity

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Chinese Physics C 2012年第5期36卷 403-409页

作者： hsu Jong-Ping Department of Physics University of Massachusetts Dartmouth North Dartmouth

Based on a generalized Yang-Mills framework, gravitational and strong interactions can be unified in analogy with the unification in the electroweak theory. By gauging T （4） × [SU （3）] color in flat space-time, we have a unified model of chromo-gravity with a new tensor gauge field, which couples universally to all gluons, quarks and anti-quarks. The space-time translational gauge symmetry assures that all wave equations of quarks and gluons reduce to a Hamilton-Jacobi equation with the same ‘effective Riemann metric tensors’ in the geometric-optics （or classical） limit. The emergence of ef f ective metric tensors in the classical limit is essential for the unified model to agree with experiments. The unified model suggests that all gravitational, strong and electroweak interactions appear to be dictated by gauge symmetries in the generalized Yang-Mills framework.

关键词： unified model chromodynamics and gravity generalized Yang-Mills framework effective Riemann metric tensor

XML-Based Information Fusion Architecture Based on Cloud Computing Ecosystem

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Computers, Materials & Continua 2019年第9期61卷 929-950页

作者： I-Ching hsu Department of Computer Science and Information Engineering National Formosa UniversityHuwei TownshipYunlin County 632Taiwan

Considering cloud computing from an organizational and end user computing point of view,it is a new paradigm for deploying,managing and offering services through a shared *** development of cloud computing applications,however,are the lack of a uniformly approach to cope with the heterogeneous information *** leads cloud computing to inefficient development and a low potential *** study addresses these issues to propose a novel Web 2.0 Mashups as a Service,called WMaaS,which is a fundamental cloud service *** WMaaS is developed based on a XML-based Mashups Architecture(XMA)that is composed of Web 2.0 Mashups technologies,including Web Data,Web API,Web Interaction,and Web Presentation to associate with existing service *** demonstrate the feasibility of this approach,this study implemented a Ubiquitous Location-based Service System(ULSS)that is a cloud computing application developed based on WMaaS to provide continuous and location-based schedule information for organization monitoring and end user needs.

关键词： Web 2.0 mashups open data XML cloud computing

3D culturing of human adipose-derived stem cells enhances their pluripotency and differentiation abilities

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Journal of Materials Science & Technology 2021年第4期63卷 9-17页

作者： Tzu-Cheng Sung Chao-wen Heish Henry Hsin-Chung Lee Jhe-Yu hsu Chun-Ko Wang Jia-Hua Wang Yu-Ru Zhu Shih-Hsi Jen Shih-Tien hsu Abdurahman HHirad Abdullah AAlarfaj Akon Higuchi School of Ophthalmology and Optometry Eye HospitalWenzhou Medical UniversityNo.270Xueyuan RoadWenzhouZhejiang325027China Department of Chemical and Materials Engineering National Central UniversityTaoyuan 32001Taiwan Department of Surgery Hsinchu Cathay General HospitalHsinchu 30060China Graduate Institute of Translational and Interdisciplinary Medicine National Central UniversityTaoyuan 32001Taiwan Department of Obstetrics and Gynecology Landseed HospitalTaoyuan 32405Taiwan Department of Internal Medicine Landseed HospitalTaoyuan 32405Taiwan Department of Botany and Microbiology King Saud UniversityRiyadh 11451Saudi Arabia wenzhou Institute University of Chinse Academy of ScienceWenzhou 325001China Center for Emergent Matter Science Riken2-1 HirosawaWakoSaitama 351-0198Japan

Human mesenchymal stem cells,such as human adipose-derived stem cells(hASCs),are typically cultured on a two-dimensional(2 D)monolayer material surface,on which 2 D culturing methods are easily performed and ***,hASCs usually suffer from decreased pluripotency and differentiation ability when cultured with a 2 D monolayer culturing method compared to hASCs cultured with a three-dimensional(3 D)culturing method,such as suspension *** this study,we evaluated whether the pluripotency and differentiation ability of hASCs can be reversibly changed during sequential cultivation with 2 D and 3 D culturing *** hASCs cultivated with a 3 D culturing process after 2 D culture showed at least 2-fold enhanced pluripotency(Sox2,Nanog,and OCT4)compared with that of hASCs cultured with the 2 D culture process ***,hASCs obtained from the 3 D culture process expressed increased levels of differentiation markers of chondrocytes and osteoblasts compared with hASCs obtained from the 2 D culture process when hASCs were induced to ***,their pluripotency and differentiation ability were extensively reduced when hASCs were shifted from 3 D culture to 2 D culture and vice versa,which indicates that hASCs show reversibility in terms of their pluripotency and differentiation ability depending on their environment in 2 D and 3 D *** reversibility of pluripotency and differentiation ability were found to last for at least 5 passages in culture during the alternative and sequential culture of cells with 2 D and 3 D culturing *** study revealed the importance of the culture microenvironment in maintaining the pluripotency and differentiation ability of hASCs,which may reduce the effects of the aging process in *** discuss whether the environment of stem cell culture(i.e.,2 D or 3 D cultivation)can affect stem cell fate in terms of pluripotency and differentiation reversibility.

关键词： culture alone stem

Ion Probe Study of Silicate Inclusions from Colomera (ⅡE) Iron Meteorite: the Rare Earth Element Perspective

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Acta Geologica Sinica(English Edition) 2004年第5期78卷 1060-1074页

作者： hsu Weibiao CA 91125 California Institute of Technology China Division of Geological & Planetary Sciences Chinese Academy of Sciences Laboratory for Astrochemistry and Planetary Sciences Purple Mountain Observatory Nanjing 210008 Pasadena USA

Coupled with a petrographical study, I carried out an ion probe study of rare earth element microdistributions in mineral phases of silicate inclusions from the Colomera ⅡE iron meteorite. Most mineral grains have homogeneous REEs, but show considerable inter-grain variations by a factor of 2 to 100. The whole rock REE abundances for Colomera, estimated by combining REE data with modal abundances, are relatively LREE-enriched with REEs of -10’CI, which suggest that Colomera silicates were highly differentiated and might represent a low degree partial melt (-10%) of a chondritic source. REE geochemistry of Colomera silicate inclusions points to an origin that involves differentiation, dynamic mixing, remelting, reduction, recrystallization, and subsequent rapid cooling near the surface of a planetary body.

关键词： ion probe rare earth elements Colomera silicate inclusions ⅡE iron meteorites