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Holomorphic Factorization of Superstring Scattering Amplitudes

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Communications in Theoretical Physics 2011年第1期55卷 1-5页

作者： simon davis Research Foundation of Southern Califoria

The holomorphic factorization of the superstring partition function is verified at arbitrary genus. The evaluation of scattering amplitudes and the implications of genus-dependent estimates on the string coupling are ... 详细信息

关键词： holomorphic factorization Ramond measure supermoduli space coordinate

Univalent Functions and Diff(S^1)/S^1

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Acta Mathematica Sinica,English Series 2012年第6期28卷 1233-1236页

作者： simon davis Research Foundation of Southern California

The relation between Diff（S^1）/S^1 and the space of univalent analytic functions on the disk is elucidated and shown to provide upper bounds for the volumes of exhaustive approximations to an analytic submanifold of an infinite-dimensional space. The maximum magnitudes of the coefficients in the series expansions of univalent superanalytic functions on the superdisk are inferred.

关键词： Univalent diffeomorphism group superanalytic functions

回顾过去,展望未来澳大利亚国家档案馆电子文件管理30年

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档案管理 2007年第6期 63-64页

作者： simon davis 章燕华中国人民大学信息资源管理学院

发动变革的引擎30多年前．澳大利亚国家档案馆（下简称国家馆）首次接收移交进馆关于石油开发勘测中海底爆破的数量庞大的计算机文件。1991年，Steve Stuckey所著的（The good oil for Australia：petroleumdata）记录了国家档案馆早期... 详细信息

发动变革的引擎30多年前．澳大利亚国家档案馆（下简称国家馆）首次接收移交进馆关于石油开发勘测中海底爆破的数量庞大的计算机文件。1991年，Steve Stuckey所著的（The good oil for Australia：petroleumdata）记录了国家档案馆早期管理石油开发文件的经历。

关键词：电子文件管理国家档案馆展望石油开发计算机文件澳大利亚 good 国家馆

Early Identification of Stable Transformation Events by Combined Use of Antibiotic Selection and Vital Detection of Green Fluorescent Protein (GFP) in Carrot (Daucus carota L.) Callus

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Agricultural Sciences in China 2008年第6期7卷 664-671页

作者： Yuan-Yeu Yau Seth J davis Ahmet Ipek Philipp W simon U.S. Department of Agriculture Agricultural Research Service Department of Horticulture University of Wisconsin-Madison Laboratory of Genetics University of Wisconsin-Madison Madison WI 53706 USA U.S. Department of Agriculture Agricultural Research Service Department of Horticulture University of Wisconsin-Madison Madison WI 53706 USA

Genetic transformation is a useful technique to complement conventional breeding in crop improvement. Although carrot has been a model organism for in vitro embryogenesis study, genetic transformation of carrot is still lengthy and labor intensive. An efficient transformation and detection system is desirable. Direct infection of Agrobacterium to carrot calli has provided an easy way for carrot genetic transformation. To improve the efficiency of antibiotic selection in this method, we report the combined use of an improved green-fluorescent protein, referred to as smGFP, to establish a versatile selection method for carrot callus transformation system. By combining antibiotic selection with the bright fluorescence observed in the callus tissue, we were able to easily identify stable transformants in early stage of the transformation process. In addition to the GFP expression of the callus cells, the transgenic nature of callus cells was confirmed with Southern and Western analysis. We found we can link the simplicity of carrot-callus-cell transformation, early detection of stable transformants with antibiotic selection, visualization of GFP fluorescence, and molecular analysis （Southern and Western） of callus tissue （non-photosynthetic tissue） to provide a more efficient way in identifying stable transformants at early stage of carrot transformation.

关键词： Agrobacterium tumefaciens antibiotic selection Daucus carota genetic transformation reporter gene,stable transformed transgene

Finite element analyses of slope stability problems using non-associated plasticity

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Journal of Rock Mechanics and Geotechnical Engineering 2018年第6期10卷 1091-1101页

作者： simon Oberhollenzer Franz Tschuchnigg Helmut F.Schweiger Institute of Soil Mechanics Foundation Engineering and Computational Geotechnics Graz University of Technology

In recent years, finite element analyses have increasingly been utilized for slope stability problems. In comparison to limit equilibrium methods, numerical analyses do not require any definition of the failure mechanism a priori and enable the determination of the safety level more accurately. The paper compares the performances of strength reduction finite element analysis(SRFEA) with finite element limit analysis(FELA), whereby the focus is related to non-associated plasticity. Displacement-based finite element analyses using a strength reduction technique suffer from numerical instabilities when using non-associated plasticity, especially when dealing with high friction angles but moderate dilatancy angles. The FELA on the other hand provides rigorous upper and lower bounds of the factor of safety(FoS) but is restricted to associated flow rules. Suggestions to overcome this problem, proposed by davis(1968), lead to conservative FoSs; therefore, an enhanced procedure has been investigated. When using the modified approach, both the SRFEA and the FELA provide very similar results. Further studies highlight the advantages of using an adaptive mesh refinement to determine FoSs. Additionally, it is shown that the initial stress field does not affect the FoS when using a Mohr-Coulomb failure criterion.

关键词： Finite element limit analysis(FELA) Finite element method Slope stability Strength reduction technique Non-associated plasticity Adaptive mesh refinement Initial stresses

Observations on Arrhenius Degradation of Lithium-Ion Capacitors

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Materials Sciences and Applications 2020年第7期11卷 450-461页

作者： davis George Moye Pedro L. Moss Xujie Chen Wanjun Cao simon Foo Moye Consultants 527 E. Park Ave Tallahassee FL USA Greencastle Sustainable Electrical Energy Systems Tallahassee FL USA Department of Electrical and Computer Engineering Florida A&M University and Florida State University Tallahassee FL USA

Earlier research determined that lithium-ion capacitor (LIC) cycle life degradation can be accelerated by elevated temperature. LIC cycle life degradation can be described by an Arrhenius equation. This study performed cycle life testing at a constant temperature but varied cycle current. The results were described by an Arrhenius equation relying upon the number of cycles and a constant, which was determined by cycle current. Using mathematical derivations and experimental results, the researchers quantified the effects of activation energy and temperature upon this constant. Because cell temperature is nearly constant during cycles, it was deduced that elevated cycle current decreases activation energy. This lower activation energy then accelerates degradation. Thus this research demonstrates that cycle current ages LICs through its effects on their activation energies.

关键词： Arrhenius Equation Cycle Life Cycle Life Degradation Lithium-Ion Capacitor Butler-Volmer Equation Activation Energy

Rapid exhumation and cooling of the Liaonan metamorphic core complex:Inferences from 40Ar/39Ar thermochronology and implications for Late Mesozoic extension in the eastern North China Craton

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Rapid exhumation and cooling of the Liaonan metamorphic core...

中国科学院地质与地球物理研究所2007学术年会

作者： Ching-Hua Lo simon A.Wilde Gregory A.davis Department of Geosciences National Taiwan University Department of Applied Geology Curtin University of Technology Department of Earth Sciences University of Southern California Los Angeles

The Liaonan metamorphic core complex formed during crustal extension in the Liaodong Peninsula,eastern North China craton,and consists of the Jinzhou detachment fault,Proterozoic-Paleozoic sedimentary rocks in its upper plate,and exhumed high-grade Archean metamorphic rocks and Early Cretaceous granitic plutons in the lower *** of its footwall from mid-crustal levels is evidenced in the detachment fault zone by the temporal transition from amphibolite facies mylonitization at depth,through retrograde chloritic shearing and brecciation,to brittle faulting during final uplift The footwall mylonite zone is 2.5-3.5 km thick and includes Early Cretaceous(128-118 Ma) granitic rocks, together with older metamorphic *** Ar/Ar ages of muscovite,hornblende,biotite, and K-feldspar from the mylonitic rocks record that the core complex cooled between ca.120 and 107 Ma,from the time of initial crystallization of zircons(122-118 Ma) at 700-800℃in syntectonic leucocratic dikes and granitic rocks,to closure of argon diffusion in hornblende,micas,and K-feldspar at～500 to～200℃.Throughout the east- ern North China craton,the synchroneity of cooling and exhumation of metamorphic core complexes,the formation of pull-apart basins,and regional alkaline igneous activity, reflects regional extensional tectonics in the Early *** accompanied lithospheric thinning,possibly resulting from the rollback of the subducted Pacific plate along the eastern Asian margin during the Early Cretaceous.

关键词： argon thermochronology metamorphic core complex crustal extension Early Cretaceous North China Craton Liaodong Peninsula Liaonan metamorphic core complex

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社会硅谷:社会创新的发生与发展

经济社会体制比较 2006年第5期 1-12页

作者：杰夫.摩根 Nick Wilkie simon Tucker Rushanara Ali Francis davis 张晓扬杨氏基金会 "多背一公斤"组织国际青年旅馆项目团队

社会创新是为满足社会需求而进行的创造性行动和服务。近年来,随着人口老龄化、环境污染、酗酒等社会问题的日益严重,社会创新已迫在眉睫。尽管社会创新时有发生,但较之于商业和科技创新,人们对这方面的研究却较少。本文紧紧围绕社会创... 详细信息

社会创新是为满足社会需求而进行的创造性行动和服务。近年来,随着人口老龄化、环境污染、酗酒等社会问题的日益严重,社会创新已迫在眉睫。尽管社会创新时有发生,但较之于商业和科技创新,人们对这方面的研究却较少。本文紧紧围绕社会创新的概念、发展简史、动力和过程等展开讨论,并把组合各种资源和能量以推动社会创新的机构喻为“社会硅谷”。

关键词：社会创新社会问题社会硅谷

Improvements to Temperature, Warburg Impedance, and Voltage Computations for a Design-Based Predictive Model for Lithium-Ion Capacitors

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Materials Sciences and Applications 2020年第6期11卷 347-369页

作者： davis George Moye Pedro L. Moss Dhevathi Rajan Rajagopalan Kannan Xujie Chen Omonayo Bolufawi Wanjun Cao simon Y. Foo Moye Consultants Tallahassee FL USA Greencastle Sustainable Electrical Energy Systems Tallahassee FL USA Department of Electrical and Computer Engineering Florida A&M University and Florida State University Tallahassee FL USA

An earlier study manipulated the Butler-Volmer equation to effectively model a lithium-ion capacitor’s (LIC) energy storage as a function of its constituent components and charge current. However, this model had several shortcomings: computed temperature values were too low, voltage was inaccurate, and the model required Warburg impedance values that were two orders of magnitude higher than experimental results. This study began by analyzing the model’s temperature and voltage computations in order to justify output values. Ultimately, these justifications failed. Therefore, in situ temperature rise was measured during charge cycles. Experimental results indicated that temperature increases minimally during a charge cycle (·kg-1) temperature increase is negligible. After it was found that LIC temperature change is minimal during a charge cycle, the model accurately computed LIC voltage during the charge cycle and computed Warburg impedance that agreed with values derived from earlier experimental studies, even falling within the measurements’ precision error.

关键词： Lithium-Ion Capacitor Randles Equivalent Circuit Model Butler-Volmer Equation