Experimental Demonstration of Isomorphism.
Kamenicek, J.; Melicharek, M.
2000-01-01
Describes some simple experiments related to the properties of crystals. Illustrates isomorphism using single crystals of alum. Presents experiments for determining how various mixture compositions affect the growth of salt crystals. (WRM)
Springer handbook of spacetime
Petkov, Vesselin
2014-01-01
The Springer Handbook of Spacetime is dedicated to the ground-breaking paradigm shifts embodied in the two relativity theories, and describes in detail the profound reshaping of physical sciences they ushered in. It includes in a single volume chapters on foundations, on the underlying mathematics, on physical and astrophysical implications, experimental evidence and cosmological predictions, as well as chapters on efforts to unify general relativity and quantum physics. The Handbook can be used as a desk reference by researchers in a wide variety of fields, not only by specialists in relativity but also by researchers in related areas that either grew out of, or are deeply influenced by, the two relativity theories: cosmology, astronomy and astrophysics, high energy physics, quantum field theory, mathematics, and philosophy of science. It should also serve as a valuable resource for graduate students and young researchers entering these areas, and for instructors who teach courses on these subjects. The Han...
F. Springer: diplomaat-skrywer
W. F. Jonckheere
1994-05-01
Full Text Available F. Springer, pseudonym of Dutch ex-diplomat Corel Jan Schneider, fills a unique position in the present-day Dutch literary scene in that the action of his prose works is usually not situated in the Netherlands but mostly in exotic places where Schneider was posted to as an employee of the Dutch foreign service. Having Java as his place of birth and Dutch New Guinea as his first place of assignment, quite a few of his earlier stories and short novels focus on the fateful encounter between Western administrative efficiency or approach to colonial life and Eastern (mainly primitive ways of living. As a sceptic, Springer views the while man's colonial administration as futile scribbling in the margins of history'. Springer's main works are the novels Bougainville, noted for its unique structure, and Quissama, a gripping evocation of postcolonial Angola. In these and other of his texts Springer regards writing as a way of making his existence more bearable and keeping misery, encountered in all third world countries, at a distance in order not to be engulfed by it. He also views it as his expression of opposition against the world of make believe and the deception of modern diplomacy and international trade relations.
Small into-isomorphism from L\\-
DING; Guanggui
2001-01-01
［1］Lacey, H. E., Isometric Theory of Classical Banach Spaces, Berlin-Heidelberg-New York: Springer-Verlag, 1974.［2］Michael, E., Pelczynski, A., Separable spaces which admit approximations, Isreal. J. Math., 1966, 4: 189.［3］Ding Guanggui, Topics on the approximation problem of almost isometric operators by isometric operators, Functional Analysis in China (eds. Li, B. R., Wang, S. W., Yan, S. Z.), Dordrecht, Boston, London: Kluwer Academic Publishers, 1996, 19.［4］Benyamini, Y., Small into isomorphisms between spaces of continuous functions, Proc. AMS, 1981, 83: 479.［5］Benyamini, Y., Small into-isomorphisms between spaces of continuous functions II, Trans. AMS, 1983, 277: 825.［6］Alspach, D. E., Small into isomorphism on Lp spaces, Illinois J. Math., 1983, 27: 300.［7］Ding Guanggui, The approximation problem of almost isometric operators by isometric operators, Acta Math. Sci., 1988, 8: 361.［8］Ding Guanggui, Small into isomorphisms on L∞ spaces, Acta Math. Sinica, New Series, 1995, 11: 417.［9］Holmes, R. B., Geometric Functional Analysis and its Applications, New York-Berlin-Heidelberg: Springer-Verlag, 1975.［10］Wilansky, A., Modern Methods in Topological Vector Spaces, New York-London-Paris-Toronto: McGraw-Hill, Inc, 1978.
Springer Handbook of Acoustics
Rossing, Thomas D
2007-01-01
Acoustics, the science of sound, has developed into a broad interdisciplinary field encompassing the academic disciplines of physics, engineering, psychology, speech, audiology, music, architecture, physiology, neuroscience, and others. The Springer Handbook of Acoustics is an unparalleled modern handbook reflecting this richly interdisciplinary nature edited by one of the acknowledged masters in the field, Thomas Rossing. Researchers and students benefit from the comprehensive contents spanning: animal acoustics including infrasound and ultrasound, environmental noise control, music and human speech and singing, physiological and psychological acoustics, architectural acoustics, physical and engineering acoustics, signal processing, medical acoustics, and ocean acoustics. This handbook reviews the most important areas of acoustics, with emphasis on current research. The authors of the various chapters are all experts in their fields. Each chapter is richly illustrated with figures and tables. The latest rese...
Khatib, Oussama
2016-01-01
The second edition of this handbook provides a state-of-the-art cover view on the various aspects in the rapidly developing field of robotics. Reaching for the human frontier, robotics is vigorously engaged in the growing challenges of new emerging domains. Interacting, exploring, and working with humans, the new generation of robots will increasingly touch people and their lives. The credible prospect of practical robots among humans is the result of the scientific endeavour of a half a century of robotic developments that established robotics as a modern scientific discipline. The ongoing vibrant expansion and strong growth of the field during the last decade has fueled this second edition of the Springer Handbook of Robotics. The first edition of the handbook soon became a landmark in robotics publishing and won the American Association of Publishers PROSE Award for Excellence in Physical Sciences & Mathematics as well as the organization’s Award for Engineering & Technology. The second edition o...
Springer handbook of acoustics
2014-01-01
Acoustics, the science of sound, has developed into a broad interdisciplinary field encompassing the academic disciplines of physics, engineering, psychology, speech, audiology, music, architecture, physiology, neuroscience, and electronics. The Springer Handbook of Acoustics is also in his 2nd edition an unparalleled modern handbook reflecting this richly interdisciplinary nature edited by one of the acknowledged masters in the field, Thomas Rossing. Researchers and students benefit from the comprehensive contents. This new edition of the Handbook features over 11 revised and expanded chapters, new illustrations, and 2 new chapters covering microphone arrays and acoustic emission. Updated chapters contain the latest research and applications in, e.g. sound propagation in the atmosphere, nonlinear acoustics in fluids, building and concert hall acoustics, signal processing, psychoacoustics, computer music, animal bioacousics, sound intensity, modal acoustics as well as new chapters on microphone arrays an...
The Boolean Isomorphism problem
Agrawal, M. [Indian Institute of Technology, Kanpur (India); Thierauf, T. [Universitaet Ulm (Germany)
1996-12-31
We investigate the computational complexity of the Boolean Isomorphism problem (BI): on input of two Boolean formulas F and G decide whether there exists a permutation of the variables of G such that F and G become equivalent. Our main result is a one-round interactive proof for BI, where the verifier has access to an NP oracle. To obtain this, we use a recent result from learning theory by Bshouty et.al. that Boolean formulas can be learned probabilistically with equivalence queries and access to an NP oracle. As a consequence, BI cannot be {sigma}{sup p}{sub 2} complete unless the Polynomial Hierarchy collapses. This solves an open problem posed in [BRS95]. Further properties of BI are shown: BI has And- and Or-functions, the counting version, No. BI, can be computed in polynomial time relative to BI, and BI is self-reducible.
Isomorphism, Diffusion and Decoupling
Boxenbaum, Eva; Jonsson, Stefan
2017-01-01
This chapter traces the evolution of the core theoretical constructs of isomorphism, decoupling and diffusion in organizational institutionalism. We first review the original theoretical formulations of these constructs and then examine their evolution in empirical research conducted over the past...
Official portrait of astronaut Robert C. Springer
1988-01-01
Official portrait of astronaut Robert C. Springer, United Stated Marine Corps (USMC) Colonel, member of Astronaut Class 9 (1980), and mission specialist. Springer wears launch and entry suit (LES) while holding helmet.
Springer Handbook of Crystal Growth
Dhanaraj, Govindhan; Prasad, Vishwanath; Dudley, Michael
2010-01-01
Over the years, many successful attempts have been made to describe the art and science of crystal growth. Most modern advances in semiconductor and optical devices would not have been possible without the development of many elemental, binary, ternary, and other compound crystals of varying properties and large sizes. The objective of the Springer Handbook of Crystal Growth is to present state-of-the-art knowledge of both bulk and thin-film crystal growth. The goal is to make readers understand the basics of the commonly employed growth processes, materials produced, and defects generated. Almost 100 leading scientists, researchers, and engineers from 22 different countries from academia and industry have been selected to write chapters on the topics of their expertise. They have written 52 chapters on the fundamentals of bulk crystal growth from the melt, solution, and vapor, epitaxial growth, modeling of growth processes and defects, techniques of defect characterization as well as some contemporary specia...
Second-Order Type Isomorphisms Through Game Semantics
De Lataillade, Joachim
2007-01-01
The characterization of second-order type isomorphisms is a purely syntactical problem that we propose to study under the enlightenment of game semantics. We study this question in the case of second-order λ$\\mu$-calculus, which can be seen as an extension of system F to classical logic, and for which we deﬁne a categorical framework: control hyperdoctrines. Our game model of λ$\\mu$-calculus is based on polymorphic arenas (closely related to Hughes' hyperforests) which evolve during the play (following the ideas of Murawski-Ong). We show that type isomorphisms coincide with the "equality" on arenas associated with types. Finally we deduce the equational characterization of type isomorphisms from this equality. We also recover from the same model Roberto Di Cosmo's characterization of type isomorphisms for system F. This approach leads to a geometrical comprehension on the question of second order type isomorphisms, which can be easily extended to some other polymorphic calculi inc...
Quantum Algorithms for Tree Isomorphism and State Symmetrization
Rosenbaum, David
2010-01-01
The graph isomorphism problem is theoretically interesting and also has many practical applications. The best known classical algorithms for graph isomorphism all run in time super-polynomial in the size of the graph in the worst case. An interesting open problem is whether quantum computers can solve the graph isomorphism problem in polynomial time. In this paper, an algorithm is shown which can decide if two rooted trees are isomorphic in polynomial time. Although this problem is easy to solve efficiently on a classical computer, the techniques developed may be useful as a basis for quantum algorithms for deciding isomorphism of more interesting types of graphs. The related problem of quantum state symmetrization is also studied. A polynomial time algorithm for the problem of symmetrizing a set of orthonormal states over an arbitrary permutation group is shown. This algorithm is then generalized to allow symmetrization over a set of representatives of the cosets of a normal subgroup.
Sherali-Adams Relaxations of Graph Isomorphism Polytopes
Malkin, Peter N
2011-01-01
We investigate the Sherali-Adams lift & project hierarchy applied to a graph isomorphism polytope whose integer points encode the isomorphisms between two graphs. In particular, the Sherali-Adams relaxations characterize a new vertex classification algorithm for graph isomorphism, which we call the generalized vertex classification algorithm. This algorithm generalizes the classic vertex classification algorithm and generalizes the work of Tinhofer on polyhedral methods for graph automorphism testing. We establish that the Sherali-Adams lift & project hierarchy when applied to a graph isomorphism polytope needs Omega(n) iterations in the worst case before converging to the convex hull of integer points. We also show that this generalized vertex classification algorithm is also strongly related to the well-known Weisfeiler-Lehman algorithm, which we show can also be characterized in terms of the Sherali-Adams relaxations of a semi-algebraic set whose integer points encode graph isomorphisms.
Springer handbook of mechanical engineering
Grote, Karl-Heinrich [Magdeburg Univ. (Germany). Dept. of Mechanical Engineering; Antonsson, Erik K. (eds.) [California Inst. of Technology (CALTEC), Pasadena, CA (United States). Dept. of Mechanical Engineering
2009-07-01
Mechanical Engineering is a professional engineering discipline which involves the application of principles of physics, design, manufacturing and maintenance of mechanical systems. It requires a solid understanding of the key concepts including mechanics, kinematics, thermodynamics and energy. Mechanical engineers use these principles and others in the design and analysis of automobiles, aircrafts, heating and cooling systems, industrial equipment and machinery. In addition to these main areas, specialized fields are necessary to prepare future engineers for their positions in industry, such as mechatronics and robotics, transportation and logistics, fuel technology, automotive engineering, biomechanics, vibration, optics and others. Accordingly, the Springer Handbook of Mechanical Engineering devotes its contents to all areas of interest for the practicing engineer as well as for the student at various levels and educational institutions. Authors from all over the world have contributed with their expertise and support the globally working engineer in finding a solution for today's mechanical engineering problems. Each subject is discussed in detail and supported by numerous figures and tables. DIN standards are retained throughout and ISO equivalents are given where possible. The text offers a concise but detailed and authoritative treatment of the topics with full references. (orig.)
Living in a Jerry Springer World
Houston, Paul D.
2005-01-01
The author admits that he has watched Jerry Springer on occasion. It is a guilty pleasure. The Springer show has come to represent the extremes in the society--perversion, unlikely pairings, lying, and cheating. Liberal Hollywood has been roundly criticized, and justifiably so, over the direction it has taken with much of the entertainment to the…
Living in a Jerry Springer World
Houston, Paul D.
2005-01-01
The author admits that he has watched Jerry Springer on occasion. It is a guilty pleasure. The Springer show has come to represent the extremes in the society--perversion, unlikely pairings, lying, and cheating. Liberal Hollywood has been roundly criticized, and justifiably so, over the direction it has taken with much of the entertainment to the…
Springer Publishing Booth | 4-5 October
2016-01-01
In the spirit of continuation of the CERN Book Fairs of the past years, Springer Nature will be present with a book and journal booth on October 4th and 5th, located as usual in the foyer of the Main Building. Some of the latest titles in particle physics and related fields will be on sale. You are cordially invited to come to the booth to meet Heike Klingebiel (Licensing Manager / Library Sales), Hisako Niko (Publishing Editor) and Christian Caron (Publishing Editor). In particular, information about the new Nano database – nanomaterial and device profiles from high-impact journals and patents, manually abstracted, curated and updated by nanotechnology experts – will be available. The database is accessible here: http://nano.nature.com/.
Springer handbook of model-based science
Bertolotti, Tommaso
2017-01-01
The handbook offers the first comprehensive reference guide to the interdisciplinary field of model-based reasoning. It highlights the role of models as mediators between theory and experimentation, and as educational devices, as well as their relevance in testing hypotheses and explanatory functions. The Springer Handbook merges philosophical, cognitive and epistemological perspectives on models with the more practical needs related to the application of this tool across various disciplines and practices. The result is a unique, reliable source of information that guides readers toward an understanding of different aspects of model-based science, such as the theoretical and cognitive nature of models, as well as their practical and logical aspects. The inferential role of models in hypothetical reasoning, abduction and creativity once they are constructed, adopted, and manipulated for different scientific and technological purposes is also discussed. Written by a group of internationally renowned experts in ...
The isomorphism problem for some universal operator algebras
Davidson, Kenneth R; Shalit, Orr Moshe
2010-01-01
This paper addresses the isomorphism problem for the universal operator algebras generated by a row contraction subject to homogeneous polynomial relations. We find that two such algebras are isometrically isomorphic if and only if the defining polynomial relations are the same up to a unitary change of variables, and that this happens if and only if the associated subproduct systems are isomorphic. The proof makes use of the complex analytic structure of the character space, together with some recent results on subproduct systems. Restricting attention to commutative operator algebras defined by radical relations yields strong resemblances with classical algebraic geometry. These commutative operator algebras turn out to be algebras of analytic functions on algebraic varieties. We prove a projective Nullstellensatz connecting closed ideals and their zero sets. Under some technical assumptions, we find that two such algebras are isomorphic as algebras if and only if they are similar, and we obtain a clear geo...
Subgraph Isomorphism in Temporal Networks
Redmond, Ursula
2016-01-01
Temporal information is increasingly available as part of large network data sets. This information reveals sequences of link activations between network entities, which can expose underlying processes in the data. Examples include the dissemination of information through a social network, the propagation of musical ideas in a music sampling network, and the spread of a disease via contacts between infected and susceptible individuals. The search for these more meaningful patterns may be formulated as a time-respecting subgraph isomorphism problem. Our set of query graphs include an enumeration of small random graphs and fan-out-fan-in structures, all composed of time-respecting paths. We explore three methods of solving the problem, which differ in how they exploit temporal and topological information. One approach extracts all subgraphs that have the temporal properties we require and then performs subgraph isomorphism testing on each subgraph. Another approach performs subgraph isomorphism testing first wi...
Deciding isomorphism of Lie algebras
Graaf, W.A. de
2001-01-01
When doing calculations with Lie algebras one of the main problems is to decide whether two given Lie algebras are isomorphic. A partial solution to this problem is obtained by calculating structural invariants. There is also a direct method available which involves the computation of Grobner bases.
Trends in Scientific Publishing at Springer
Eichhorn, Guenther
Scientific publishing has undergone tremendous changes in the last decade, and it is still evolving rapidly. This article describes some of the issues that are facing scientific publishers, and shows some examples of what one of the commercial publishers, Springer, has done and is working on, in order to stay abreast of these changes and to embrace the new technologies that become available. Springer has moved rapidly into the digital age and has by now digitized almost all its journal content and a significant part of its book content. We have developed new capabilities that make use of the new technologies available and are in the process of further utilizing these new possibilities. Web products like AuthorMapper, SpringerProtocols, and Social Networking sites explore some of these new capabilities. We will continue to explore enhancements of our scientific publishing efforts to provide new possibilities for communicating scientific research.
Isomorphic Formulae in Classical Propositional Logic
Dosen, K
2009-01-01
Isomorphism between formulae is defined with respect to categories formalizing equality of deductions in classical propositional logic and in the multiplicative fragment of classical linear propositional logic caught by proof nets. This equality is motivated by generality of deductions. Characterizations are given for pairs of isomorphic formulae, which lead to decision procedures for this isomorphism.
Perfusion calorimetry in the characterization of solvates forming isomorphic desolvates.
Baronsky, Julia; Preu, Martina; Traeubel, Michael; Urbanetz, Nora Anne
2011-09-18
In this study, the potential of perfusion calorimetry in the characterization of solvates forming isomorphic desolvates was investigated. Perfusion calorimetry was used to expose different hydrates forming isomorphic desolvates (emodepside hydrates II-IV, erythromycin A dihydrate and spirapril hydrochloride monohydrate) to stepwise increasing relative vapour pressures (RVP) of water and methanol, respectively, while measuring thermal activity. Furthermore, the suitability of perfusion calorimetry to distinguish the transformation of a desolvate into an isomorphic solvate from the adsorption of solvent molecules to crystal surfaces as well as from solvate formation that is accompanied by structural rearrangement was investigated. Changes in the samples were confirmed using FT-Raman and FT-IR spectroscopy. Perfusion calorimetry indicates the transformation of a desolvate into an isomorphic solvate by a substantial exothermic, peak-shaped heat flow curve at low RVP which reflects the rapid incorporation of solvent molecules by the desolvate to fill the structural voids in the lattice. In contrast, adsorption of solvent molecules to crystal surfaces is associated with distinctly smaller heat changes whereas solvate formation accompanied by structural changes is characterized by an elongated heat flow. Hence, perfusion calorimetry is a valuable tool in the characterization of solvates forming isomorphic desolvates which represents a new field of application for the method.
Springer Publishing book booth | 8-9 October
CERN Library
2015-01-01
Continuing the spirit of the CERN Book Fairs of the past years, Springer Publishing will have a book booth in the foyer of the Main Building, from 8 to 9 October. Some of the latest titles in particle physics and related fields will be on sale. For the occasion, Professor Ugo Amaldi will present his new book “Particle Accelerators: From Big Bang Physics to Hadron Therapy” on Thursday, 8 October at 5 p.m. in Room F (Charpak room). The presentation will take place in the framework of the Italian Teachers week and will be followed by a signing session. A special highlight at the Springer booth will be the presentation of the CERN-sponsored Open Access book: “J Rafelski (ed): Melting Hadrons, Boiling Quarks - From Hagedorn Temperature to Ultra-Relativistic Heavy-Ion Collisions at CERN; With a Tribute to Rolf Hagedorn”.
Mental Constructions for The Group Isomorphism Theorem
Arturo Mena-Lorca
2016-03-01
Full Text Available The group isomorphism theorem is an important subject in any abstract algebra undergraduate course; nevertheless, research shows that it is seldom understood by students. We use APOS theory and propose a genetic decomposition that separates it into two statements: the first one for sets and the second with added structure. We administered a questionnaire to students from top Chilean universities and selected some of these students for interviews to gather information about the viability of our genetic decomposition. The students interviewed were divided in two groups based on their familiarity with equivalence relations and partitions. Students who were able to draw on their intuition of partitions were able to reconstruct the group theorem from the set theorem, while those who stayed on the purely algebraic side could not. Since our approach to learning this theorem was successful, it may be worthwhile to gather data while teaching it the way we propose here in order to check how much the learning of the group isomorphism theorem is improved. This approach could be expanded to other group homomorphism theorems provided further analysis is conducted: going from the general (e.g., sets to the particular (e.g., groups might not always the best strategy, but in some cases we may just be turning to more familiar settings.
Topological isomorphisms for some universal operator algebras
Hartz, Michael
2012-01-01
Let $I$ be a radical homogeneous ideal of complex polynomials in $d$ variables, and let $\\mathcal A_I$ be the norm-closed non-selfadjoint algebra generated by the compressions of the $d$-shift on Drury-Arveson space $H^2_d$ to the co-invariant subspace $H^2_d \\ominus I$. Then $\\mathcal A_I$ is the universal operator algebra for commuting row contractions subject to the relations in $I$. In this note, we study the question, under which conditions there are topological isomorphisms between two such algebras $\\mathcal A_I$ and $\\mathcal A_J$. We provide a positive answer to a conjecture of Davdison, Ramsey and Shalit: that $\\mathcal A_I$ and $\\mathcal A_J$ are topologically isomorphic if and only if there is an invertible linear map $A$ on $\\mathbb C^d$ which maps the vanishing locus of $J$ isometrically onto the vanishing locus of $I$. Most of the proof is devoted to showing that finite algebraic sums of full Fock spaces over subspaces of $\\mathbb C^d$ are closed. This allows us to show that the map $A$ induces...
Efficient enumeration of non-isomorphic processing trees
Waas, F.
1998-01-01
Enumeration of search spaces belonging to join queries, so far comprises large sets of isomorphic processing trees, i.e. trees that can be equalized by only commutative exchange of the input relations to the operators. Since these differences can be handled effectively by the costing method it is su
On isomorphisms of integral table algebras
FAN; Yun(樊恽); SUN; Daying(孙大英)
2002-01-01
For integral table algebras with integral table basis T, we can consider integral R-algebra RT over a subring R of the ring of the algebraic integers. It is proved that an R-algebra isomorphism between two integral table algebras must be an integral table algebra isomorphism if it is compatible with the so-called normalizings of the integral table algebras.
Symposium in Honour of T.A. Springer
Hesselink, Wim; Kallen, Wilberd; Strooker, Jan
1987-01-01
From 1-4 April 1986 a Symposium on Algebraic Groups was held at the University of Utrecht, The Netherlands, in celebration of the 350th birthday of the University and the 60th of T.A. Springer. Recognized leaders in the field of algebraic groups and related areas gave lectures which covered wide and central areas of mathematics. Though the fourteen papers in this volume are mostly original research contributions, some survey articles are included. Centering on the Symposium subject, such diverse topics are covered as Discrete Subgroups of Lie Groups, Invariant Theory, D-modules, Lie Algebras, Special Functions, Group Actions on Varieties.
Another test for isomorphism in planetary gear trains
Narayanappa, P.; Rao, Y.V.D. [BITS-Pilani. Dept. of Mechanical Engineering, Hyderabad (India)
2012-07-01
Wind turbines need overdrives that amplify the speed of turbine shaft and provide high speed at generator shaft. Epicyclic gear trains being compact, convenient to build and operate are most suitable for over drives. Graph theory is used in synthesis of the Epicyclic Gear Trains (EGT) to identify various possible design alternatives. Recursive method is used for generation of EGTs. Test for Isomorphism is essential to remove redundancy in the synthesis of EGTs. A test for isomorphism of EGTs using connectivity count matrix (CCM) is explained. The test is applied to unleveled graphs of EGT with up to seven links. The non-isomorphic graphs were identified by comparing CCMs of the graphs which are generated by adding one link to each of the non-isomorphic graphs of previous stage graphs. This method does not consider the connectivity relations between vertices and levels of the links. The results were compared with previously published results to check the validity of the method explained. (Author)
Springer handbook of lasers and optics
2012-01-01
The Springer Handbook of Lasers and Optics provides fast, up-to-date, comprehensive and authoritative coverage of the wide fields of optics and lasers. It is written for daily use in the office or laboratory and offers explanatory text, data, and references needed for anyone working with lasers and optical instruments. This second edition features numerous updates and additions. Especially four new chapters on Fiber Optics, Integrated Optics, Frequency Combs, and Interferometry reflect the major changes. In addition, chapters Optical Materials and Their Properties, Optical Detectors, Nanooptics, and Optics far Beyond the Diffraction Limit have been thoroughly revised and updated. The now 25 chapters are grouped into four parts which cover basic principles and materials, fabrication and properties of optical components, coherent and incoherent light sources, and, finally, selected applications and special fields such as terahertz photonics, x-ray optics and holography. Each chapter is authored by respected exp...
Springer handbook of bio-/neuroinformatics
2014-01-01
The Springer Handbook of Bio-/Neuro-Informatics is the first published book in one volume that explains together the basics and the state-of-the-art of two major science disciplines in their interaction and mutual relationship, namely: information sciences, bioinformatics and neuroinformatics. Bioinformatics is the area of science which is concerned with the information processes in biology and the development and applications of methods, tools and systems for storing and processing of biological information thus facilitating new knowledge discovery. Neuroinformatics is the area of science which is concerned with the information processes in biology and the development and applications of methods, tools and systems for storing and processing of biological information thus facilitating new knowledge discovery. The text contains 62 chapters organized in 12 parts, 6 of them covering topics from information science and bioinformatics, and 6 cover topics from information science and neuroinformatics. Each chapter ...
Springer Handbook of Lasers and Optics
Träger, Frank
2007-01-01
The Springer Handbook of Lasers and Optics provides fast, up-to-date, comprehensive and authoritative coverage of the wide fields of optics and lasers. It is written for daily use in the office or laboratory and offers explanatory text, data, and references needed for anyone working with lasers and optical instruments. Each chapter or section is authored by respected experts and contains the basic principles, applications and latest information in the field. Among the subjects covered are geometrical and wave optics, linear and nonlinear optics, optical materials and components, detectors, incoherent and all essential types of coherent light sources, generation of ultrashort pulses, spectroscopic techniques, laser safety as well as current trends in such modern areas as quantum optics, femto- and attosecond physics, and nanooptics as well as optics beyond the diffraction limit. The 21 chapters are grouped into four parts which cover basic principles and materials, fabrication and properties of optical compone...
Isomorphism and Morita equivalence of graph algebras
Abrams, Gene
2008-01-01
For any countable graph $E$, we investigate the relationship between the Leavitt path algebra $L_{\\C}(E)$ and the graph C*-algebra $C^*(E)$. For graphs $E$ and $F$, we examine ring homomorphisms, ring *-homomorphisms, algebra homomorphisms, and algebra *-homomorphisms between $L_{\\C}(E)$ and $L_{\\C}(F)$. We prove that in certain situations isomorphisms between $L_{\\C}(E)$ and $L_{\\C}(F)$ yield *-isomorphisms between the corresponding C*-algebras $C^*(E)$ and $C^*(F)$. Conversely, we show that *-isomorphisms between $C^*(E)$ and $C^*(F)$ produce isomorphisms between $L_{\\C}(E)$ and $L_{\\C}(F)$ in specific cases. The relationship between Leavitt path algebras and graph C*-algebras is also explored in the context of Morita equivalence.
Manoel Mateus Bueno Gonzalez
1999-06-01
Full Text Available Both fungai and algal infections have been reported in elasmobranchs. This study describes the first record of hyphalomycosis infection in Mustelus schmitii (Springer, 1940. The data was obtained through the examination of one animal in captivity and ninety five in their natural environment. Was also detected four cases of Fusarium solani infection. The impact of these diseases on the wild population is unknown.
Isomorphism of Intransitive Linear Lie Equations
Jose Miguel Martins Veloso
2009-11-01
Full Text Available We show that formal isomorphism of intransitive linear Lie equations along transversal to the orbits can be extended to neighborhoods of these transversal. In analytic cases, the word formal is dropped from theorems. Also, we associate an intransitive Lie algebra with each intransitive linear Lie equation, and from the intransitive Lie algebra we recover the linear Lie equation, unless of formal isomorphism. The intransitive Lie algebra gives the structure functions introduced by É. Cartan.
The Graph Isomorphism Problem and approximate categories
Derksen, Harm
2010-01-01
It is unknown whether two graphs can be tested for isomorphism in polynomial time. A classical approach to the Graph Isomorphism Problem is the d-dimensional Weisfeiler-Lehman algorithm. The d-dimensional WL-algorithm can distinguish many pairs of graphs, but the pairs of non-isomorphic graphs constructed by Cai, Furer and Immerman it cannot distinguish. If d is fixed, then the WL-algorithm runs in polynomial time. We will formulate the Graph Isomorphism Problem as an Orbit Problem: Given a representation V of an algebraic group G and two elements v_1,v_2 in V, decide whether v_1 and v_2 lie in the same G-orbit. Then we attack the Orbit Problem by constructing certain approximate categories C_d(V), d=1,2,3,... whose objects include the elements of V. We show that v_1 and v_2 are not in the same orbit by showing that they are not isomorphic in the category C_d(V) for some d. For every d this gives us an algorithm for isomorphism testing. We will show that the WL-algorithms reduce to our algorithms, but that ou...
Conjecture of Li and Praeger concerning the isomorphisms of Cayley graphs of A5
XU; Mingyao
2001-01-01
［1］Li, C. H., Praeger, C. E., The finite simple groups with at most two fusion classes of every order, Comm. Algebra, 1996, 24: 3681—3704.［2］Sabidussi, G. O., Vertex-transitive graphs, Monash. Math., 1964, 68: 426—438.［3］Xu, M. Y., Automorphism groups and isomorphisms of Cayley digraphs, Discrete Math., 1998, 182: 309—319.［4］Dixon, J. D., Mortimer, B., Permutation Groups, Berlin: Springer-Verlag, 1996.［5］Suzuki, M., Group Theory I, Berlin: Springer Verlag, 1982.［6］Wielandt, H., Finite Permutation Groups, New York: Academic Press, 1964.［7］Babai, L., Isomorphism problem for a class of point-symmetric structures, Acta Math. Acad. Sci. Hung., 1977, 29: 329—336.［8］Gorenstein, D., Finite Simple Groups, New York: Plenum Press, 1982.［9］Conway, J. H., Curtis, R. T., Norton, S. P. et al., An Atlas of Finite Groups, Oxford: Clarendon Press, 1985.［10］Kleidman, P., Liebeck, M., The Subgroup Structure of the Finite Classical Groups, Cambridge: Cambridge University Press, 1990.［11］Gu, Z. Y., Li, C. H., A nonabelian CI-group, Australas. J. Combin., 1998, 17: 229—233.
Nigel eGuenole
2016-03-01
Full Text Available We describe a Monte Carlo study examining the impact of assuming item isomorphism (i.e., equivalent construct meaning across levels of analysis on conclusions about homology (i.e., equivalent structural relations across levels of analysis under varying degrees of non-isomorphism in the context of ordinal indicator multilevel structural equation models (MSEMs. We focus on the condition where one or more loadings are higher on the between level than on the within level to show that while much past research on homology has ignored the issue of psychometric isomorphism, psychometric isomorphism is in fact critical to valid conclusions about homology. More specifically, when a measurement model with non-isomorphic items occupies an exogenous position in a multilevel structural model and the non-isomorphism of these items is not modeled, the within level exogenous latent variance is under-estimated leading to over-estimation of the within level structural coefficient, while the between level exogenous latent variance is overestimated leading to underestimation of the between structural coefficient. When a measurement model with non-isomorphic items occupies an endogenous position in a multilevel structural model and the non-isomorphism of these items is not modeled, the endogenous within level latent variance is under-estimated leading to under-estimation of the within level structural coefficient while the endogenous between level latent variance is over-estimated leading to over-estimation of the between level structural coefficient. The innovative aspect of this article is demonstrating that even minor violations of psychometric isomorphism render claims of homology untenable. We also show that posterior predictive p-values for ordinal indicator Bayesian MSEMs are insensitive to violations of isomorphism even when they lead to severely biased within and between level structural parameters. We highlight conditions where poor estimation of even
Guenole, Nigel
2016-01-01
We describe a Monte Carlo study examining the impact of assuming item isomorphism (i.e., equivalent construct meaning across levels of analysis) on conclusions about homology (i.e., equivalent structural relations across levels of analysis) under varying degrees of non-isomorphism in the context of ordinal indicator multilevel structural equation models (MSEMs). We focus on the condition where one or more loadings are higher on the between level than on the within level to show that while much past research on homology has ignored the issue of psychometric isomorphism, psychometric isomorphism is in fact critical to valid conclusions about homology. More specifically, when a measurement model with non-isomorphic items occupies an exogenous position in a multilevel structural model and the non-isomorphism of these items is not modeled, the within level exogenous latent variance is under-estimated leading to over-estimation of the within level structural coefficient, while the between level exogenous latent variance is overestimated leading to underestimation of the between structural coefficient. When a measurement model with non-isomorphic items occupies an endogenous position in a multilevel structural model and the non-isomorphism of these items is not modeled, the endogenous within level latent variance is under-estimated leading to under-estimation of the within level structural coefficient while the endogenous between level latent variance is over-estimated leading to over-estimation of the between level structural coefficient. The innovative aspect of this article is demonstrating that even minor violations of psychometric isomorphism render claims of homology untenable. We also show that posterior predictive p-values for ordinal indicator Bayesian MSEMs are insensitive to violations of isomorphism even when they lead to severely biased within and between level structural parameters. We highlight conditions where poor estimation of even correctly specified
The Principle of Synergy and Isomorphic Units
Paternina, E
2000-01-01
A solution to the part and whole problem is presented in this paper by using a complex mathematical representation that permits to define the Holon concept as a Basic Unit System that remains itself in spite of complex operations such as integration and derivation. This can be done because of the remarkable isomorphic property of Euler Relation. We can then define a domain independent both of the observer and the object, as within it, the object is embedded. We will then be able to have a Quantum Mechanics solution without the "observer drawback", as Karl R. Popper tried to find all his life but from the philosophical point of view and which was Einstein main concern about QM too. A unit that has always similar or identical structure or form, despite even complex operations such as integration and derivation, is the ideal unit for the new sciences of complexity or just the systems sciences too, where structure or form, wholeness, organization, and complexity are main requirements. A table for validating the r...
The Principle of Synergy and Isomorphic Units
Paternina, E
2001-01-01
A solution to the part and whole problem is presented in this paper by using a complex mathematical representation that permits to define the Holon concept as a unit that remains itself in spite of complex operations such as integration and derivation. This can be done because of the remarkable isomorphic property of Euler Relation. We can then define a domain independent of the observer and the object where the object is embedded. We will then be able to have a Quantum Mechanics solution without the "observer drawback", as Karl R. Popper tried to find all his life but from the philosophical point of view and which was Einstein main concern about QM. A unit that has always similar or identical structure or form, despite even complex operations such as integration and derivation, is the ideal unit for the new sciences of complexity or just the systems sciences where structure or form, wholeness, organization, and complexity are main requirements. A table for validating the results obtained is presented in case...
Identifying the Isomorphism of Kinematic Chains
Romaniak Krystyna
2016-09-01
Full Text Available Identification of isomorphic kinematic chains is one of the key issues in researching the structure of mechanisms. As a result the structures which duplicate are eliminated and further research is carried out on kinematic chains that do not duplicate. This dilemma has been taken up by many scholars who have come up with a variety of ideas how to solve it. The review of the methods for identifying the isomorphism of kinematic chains suggested by researchers is contained in this study, including Hamming Number Technique, eigenvalues and eigenvectors, perimeter graphs, dividing and matching vertices. The spectrum of methods applied to the issue of identifying the iso-morphism of mechanisms reflects the researchers’ efforts to obtain a precise result in the shortest time possible.
Using Isomorphic Problems to Learn Introductory Physics
Lin, Shih-Yin
2016-01-01
In this study, we examine introductory physics students' ability to perform analogical reasoning between two isomorphic problems which employ the same underlying physics principles but have different surface features. Three hundred and sixty two students from a calculus-based and an algebra-based introductory physics course were given a quiz in the recitation in which they had to first learn from a solved problem provided and take advantage of what they learned from it to solve another problem (which we call the quiz problem) which was isomorphic. Previous research suggests that the multiple-concept quiz problem is challenging for introductory students. Students in different recitation classes received different interventions in order to help them discern and exploit the underlying similarities of the isomorphic solved and quiz problems. We also conducted think-aloud interviews with four introductory students in order to understand in-depth the difficulties they had and explore strategies to provide better sc...
Characterizations of Isomorphisms by Multiplicative Maps on Operator Algebras
安桂梅; 侯晋川
2001-01-01
In this paper, we discuss some multiplicative preservers and give some characterizations of isomorphisms or conjugate isomorphisms on B(X), where B(X) denotes the algebra of all bounded linear operators on a Banach space X.
Graphs whose complement and square are isomorphic
Milanic, M.; Pedersen, Anders Sune; Pellicer, D.;
2014-01-01
We study square-complementary graphs, that is, graphs whose complement and square are isomorphic. We prove several necessary conditions for a graph to be square-complementary, describe ways of building new square-complementary graphs from existing ones, construct infinite families of square...
Isomorphism, Homogeneity, and Rationalism in University Retrenchment.
Gates, Gordon S.
1997-01-01
Describes the process of retrenchment at a medium-sized state university (pseudonyms used) for the purpose of analyzing the isomorphic pressures (mimetic, coercive, normative) surfacing during the process and the role played by rationalism in decision-making. Draws on the literature of organizational theory and change, and makes comparisons with…
Springer--Germany's Most Remorselessly Criticized Publishing Giants.
Hollstein, Milton
1982-01-01
Argues that the success of West Germany's publishing giant, Axel Springer Verlag, can be attributed to the technical excellence of its products and to the fact that these products reflect the mainstream of German thought. (FL)
Springer--Germany's Most Remorselessly Criticized Publishing Giants.
Hollstein, Milton
1982-01-01
Argues that the success of West Germany's publishing giant, Axel Springer Verlag, can be attributed to the technical excellence of its products and to the fact that these products reflect the mainstream of German thought. (FL)
Springer 1:100000 Quad Transportation DLGs
Earth Data Analysis Center, University of New Mexico — Digital line graph (DLG) data are digital representations of cartographic information. DLG's of map features are converted to digital form from maps and related...
Springer 1:100000 Quad Hydrography DLGs
Earth Data Analysis Center, University of New Mexico — Digital line graph (DLG) data are digital representations of cartographic information. DLG's of map features are converted to digital form from maps and related...
Springer 1:100000 Quad Hydrography DLGs
Earth Data Analysis Center, University of New Mexico — Digital line graph (DLG) data are digital representations of cartographic information. DLG's of map features are converted to digital form from maps and related...
Isomorphisms of noncommutative domain algebras II
Arias, Alvaro
2010-01-01
This paper extends the results of the previous work of the authors on the classification on noncommutative domain algebras up to completely isometric isomorphism. Using Sunada's classification of Reinhardt domains in $C^n$, we show that aspherical noncommutative domain algebras are isomorphic if and only if their defining symbols are equivalent, in the sense that one can be obtained from the other via permutation and scaling of the free variables. Our result also shows that the automorphism groups of aspherical noncommutative domain algebras consists of a subgroup of some finite dimensional unitary group. We conclude by illustrating how our methods can be used to extend to noncommutative domain algebras some results from analysis in $C^n$ with the example of Cartan's lemma.
Non determinism through type isomorphism
Alejandro Díaz-Caro
2013-03-01
Full Text Available We define an equivalence relation on propositions and a proof system where equivalent propositions have the same proofs. The system obtained this way resembles several known non-deterministic and algebraic lambda-calculi.
Isomorphisms of Brin-Higman-Thompson groups
Dicks, Warren
2011-01-01
Let $m,\\,m',\\,r,\\, r',t,\\,t'$ be positive integers with $r,\\,r' \\ge 2$. Let $\\L_r$ denote the ring that is universal with an invertible $1{\\times}r$ matrix. Let $\\Mat{m}(\\,\\L_r^{\\otimes t})$ denote the ring of $m \\times m$ matrices over the tensor product of $t$ copies of $\\L_r$. In a natural way, $\\Mat{m}(\\,\\L_r^{\\otimes t})$ is a partially ordered ring with involution. Let $\\PU{m}(\\,\\L_r^{\\otimes t})$ denote the group of positive unitary elements. We show that $\\PU{m}(\\mkern2mu\\L_r^{\\otimes t})$ is isomorphic to the Brin-Higman-Thompson group $t V_{r,m}$; the case $t{\\,=\\,}1$ was found by Pardo, that is, $\\PU{m}(\\,\\L_r)$ is isomorphic to the Higman-Thompson group $V_{r,m}$. We survey arguments of Abrams, \\'Anh, Bleak, Brin, Higman, Lanoue, Pardo, and Thompson that prove that $t' V_{r',m'}\\iso t V_{r,m} $ if and only if $r'{\\,=\\,}r$, $t'{\\,=\\,}t$ and $ \\gcd(m',r'{-}1) = \\gcd(m,r{-}1)$ \\,\\,(if and only if $\\Mat{m'}(\\,\\L_{r'}^{\\otimes t'})$ and $\\Mat{m}(\\L_r^{\\otimes t})$ are isomorphic as partially ordered ri...
On convex relaxation of graph isomorphism.
Aflalo, Yonathan; Bronstein, Alexander; Kimmel, Ron
2015-03-10
We consider the problem of exact and inexact matching of weighted undirected graphs, in which a bijective correspondence is sought to minimize a quadratic weight disagreement. This computationally challenging problem is often relaxed as a convex quadratic program, in which the space of permutations is replaced by the space of doubly stochastic matrices. However, the applicability of such a relaxation is poorly understood. We define a broad class of friendly graphs characterized by an easily verifiable spectral property. We prove that for friendly graphs, the convex relaxation is guaranteed to find the exact isomorphism or certify its inexistence. This result is further extended to approximately isomorphic graphs, for which we develop an explicit bound on the amount of weight disagreement under which the relaxation is guaranteed to find the globally optimal approximate isomorphism. We also show that in many cases, the graph matching problem can be further harmlessly relaxed to a convex quadratic program with only n separable linear equality constraints, which is substantially more efficient than the standard relaxation involving n2 equality and n2 inequality constraints. Finally, we show that our results are still valid for unfriendly graphs if additional information in the form of seeds or attributes is allowed, with the latter satisfying an easy to verify spectral characteristic.
Using isomorphic problems to learn introductory physics
Shih-Yin Lin
2011-08-01
Full Text Available In this study, we examine introductory physics students’ ability to perform analogical reasoning between two isomorphic problems which employ the same underlying physics principles but have different surface features. Three hundred sixty-two students from a calculus-based and an algebra-based introductory physics course were given a quiz in the recitation in which they had to first learn from a solved problem provided and take advantage of what they learned from it to solve another problem (which we call the quiz problem which was isomorphic. Previous research suggests that the multiple-concept quiz problem is challenging for introductory students. Students in different recitation classes received different interventions in order to help them discern and exploit the underlying similarities of the isomorphic solved and quiz problems. We also conducted think-aloud interviews with four introductory students in order to understand in depth the difficulties they had and explore strategies to provide better scaffolding. We found that most students were able to learn from the solved problem to some extent with the scaffolding provided and invoke the relevant principles in the quiz problem. However, they were not necessarily able to apply the principles correctly. Research suggests that more scaffolding is needed to help students in applying these principles appropriately. We outline a few possible strategies for future investigation.
石鸥燕; 蔡春泉
2005-01-01
介绍SpringerLink的概况及基本使用方法,并对其收录的医学期刊进行分析.SpringerLink期刊数据库是各种数据库性能指标较好的全文数据库,从数据库所覆盖的学科范围、容量、检索系统、用户界面等多方面来看,都不失为获取医学相关资源的有效途径之一.
Electron-pair uncertainty relationships and the intracule-extracule isomorphism
Romera, Elvira [Departamento de Fisica Moderna and Instituto Carlos I de Fisica Teorica y Computacional, Universidad de Granada (Spain)]. E-mail: eromera@ugr.es
2002-07-14
Electron-pair uncertainty relationships of generalized Heisenberg type in quantum mechanics are formulated. They express restrictions imposed by quantum theory on the electron-pair intracule (relative motion) and extracule (centre-of-mass motion) densities in the two complementary spaces by means of the corresponding statistical moments. These relations are shown to reduce to an elementary or Heisenberg form when the intracule-extracule isomorphism holds. The validity of this isomorphism is also discussed for some special systems. (author). Letter-to-the-editor.
Disseminated aspergillosis attributable to Aspergillus deflectus in a springer spaniel.
Kahler, J S; Leach, M W; Jang, S; Wong, A
1990-10-01
Disseminated aspergillosis attributable to Aspergillus deflectus was diagnosed in a Springer Spaniel with lethargy, lameness, anorexia, weight loss, pyrexia, lymphadenopathy, hematuria, and urinary incontinence. Necropsy revealed granulomatous inflammation and numerous fungal hyphae in many organs. The conidial heads of the fungus have a characteristic briar-pipe appearance in culture.
An Isomorphism between Lyapunov Exponents and Shannon's Channel Capacity
Friedland, Gerald [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Metere, Alfredo [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
2017-06-07
We demonstrate that discrete Lyapunov exponents are isomorphic to numeric overflows of the capacity of an arbitrary noiseless and memoryless channel in a Shannon communication model with feedback. The isomorphism allows the understanding of Lyapunov exponents in terms of Information Theory, rather than the traditional definitions in chaos theory. The result also implies alternative approaches to the calculation of related quantities, such as the Kolmogorov Sinai entropy which has been linked to thermodynamic entropy. This work provides a bridge between fundamental physics and information theory. It suggests, among other things, that machine learning and other information theory methods can be employed at the core of physics simulations.
Complexities of Homomorphism and Isomorphism for Definite Logic Programs
Dao-Yun Xu; Zhi-Hong Tao
2005-01-01
A homomorphism ψ of logic programs from P to P' is a function mapping Atoms(P) to Atoms(P') and paper, the complexity of the decision problems on homomorphism and isomorphism for definite logic programs is studied.It is shown that the homomorphism problem (HOM-LP) for definite logic programs is NP-complete, and the isomorphism problem (ISO-LP) is equivalent to the graph isomorphism problem (GI).
The Fibered Isomorphism Conjecture for Complex Manifolds
S. K. ROUSHON
2007-01-01
In this paper we show that the Fibered Isomorphism Conjecture of Farrell and Jones,corresponding to the stable topological pseudoisotopy functor, is true for the fundamental groups of a class of complex manifolds. A consequence of this result is that the Whitehead group, reduced projective class groups and the negative K-groups of the fundamental groups of these manifolds vanish whenever the fundamental group is torsion free. We also prove the same results for a class of real manifolds including a large class of 3-manifolds which has a finite sheeted cover fibering over the circle.
Isometric Isomorphisms in Proper CQ*-algebras
Choonkil PARK; Jong Su AN
2009-01-01
In this paper,we prove the Hyers-Ulam-Rassias stability of isometric homomorphisms in proper CQ*-algebras for the following Cauchy-Jensen additive mapping:2f(x1+x2/2+y)=f(x1)+f(x2)+2f(y).The concept of Hyers-Ulam-Rassias stability originated from the Th.M.Rassias' stability theorem that appeared in the paper: On the stability of the linear mapping in Banach spaces,Proc.Amer.Math.Soc.,72 (1978),297-300.This is applied to investigate isometric isomorphisms between proper CQ*-algebras.
Springer Handbook of Condensed Matter and Materials Data
Martienssen, Werner
2005-01-01
Condensed Matter and Materials Science are two of the most active fields of applied physics, with a stream of discoveries in areas from superconductivity and magnetism to the optical, electronic and mechanical properties of materials. While a huge amount of data has been compiled and spread over numerous reference works, no single volume compiles the most used information. Springer Handbook of Condensed Matter and Materials Data provides a concise compilation of data and functional relationships from the fields of solid-state physics and materials in this 1200-page volume. The data, encapsulated in over 750 tables and 1025 illustrations, have been selected and extracted primarily from the extensive high-quality data collection Landolt-Börnstein and also from other systematic data sources and recent publications of physical and technical property data. Many chapters are authored by Landolt-Börnstein editors, including the editors of this Springer Handbook. Key Topics Fundamental Constants The International S...
Evidence That Calls-Based and Mobility Networks Are Isomorphic.
Michele Coscia
Full Text Available Social relations involve both face-to-face interaction as well as telecommunications. We can observe the geography of phone calls and of the mobility of cell phones in space. These two phenomena can be described as networks of connections between different points in space. We use a dataset that includes billions of phone calls made in Colombia during a six-month period. We draw the two networks and find that the call-based network resembles a higher order aggregation of the mobility network and that both are isomorphic except for a higher spatial decay coefficient of the mobility network relative to the call-based network: when we discount distance effects on the call connections with the same decay observed for mobility connections, the two networks are virtually indistinguishable.
A Chern-Weil Isomorphism for the Equivariant Brauer Group
Bouwknegt, Peter; Ratnam, Rishni
2011-01-01
In this paper we construct a Chern-Weil isomorphism for the equivariant Brauer group of R^n-actions on a principal torus bundle, where the target for this isomorphism is a "dimensionally reduced" Cech cohomology group. From this point of view, the usual forgetful functor takes the form of a connecting homomorphism in a long exact sequence in dimensionally reduced cohomology.
Response to Mary J. Reichling, "Intersections: Form, Feeling, and Isomorphism"
Sinclair, Anne
2004-01-01
In her response to Mary Reichling's article "Intersections: Form, Feeling, and Isomorphism, Anne Sinclair believes that the exploration of form, feeling, and isomorphism in the writings of Susanne Langer accomplishes its goal to examine and elucidate aspects of these concepts. Sinclair finds several of the ideas presented very engaging. Musical…
Isomorphisms of fiber spaces over Teichmüller spaces
HU; Yun; SHEN; Yuliang
2006-01-01
We will be mainly concerned with some important fiber spaces over Teichmüller spaces, including the Bers fiber space and Teichmüller curve, establishing an isomorphism theorem between "punctured" Teichmüller curves and determining the biholomorphic isomorphisms of these fiber spaces.
A Quantum Observable for the Graph Isomorphism Problem
Ettinger, M; Ettinger, Mark; Hoyer, Peter
1999-01-01
Suppose we are given two graphs on $n$ vertices. We define an observable in the Hilbert space $\\Co[(S_n \\wr S_2)^m]$ which returns the answer ``yes'' with certainty if the graphs are isomorphic and ``no'' with probability at least $1-n!/2^m$ if the graphs are not isomorphic. We do not know if this observable is efficiently implementable.
2003-01-01
德国施普林格(Springer-Verlag)是世界上著名的科技出版集团,LINK是施普林格出版社和它的合作公司推出的科学、技术和医学(STM)方面的在线信息资源。目前,Springer LINK全文期刊可在线阅读约490种。期刊的学科范围包括: 化学、计算机科学、经济学、工程学、环境科学、地理科学、法学、生命科学、数学、医学、物理和天文学。目前Springer Link所提供全文电子期刊的学科范围及种数分别如下: Chemical Sciences(化学):37种 Computer Science(计算机科学):45种 Economics(经济学):30种
Hypnosis in sport: an Isomorphic Model.
Robazza, C; Bortoli, L
1994-10-01
Hypnosis in sport can be applied according to an Isomorphic Model. Active-alert hypnosis is induced before or during practice whereas traditional hypnosis is induced after practice to establish connections between the two experiences. The fundamental goals are to (a) develop mental skills important to both motor and hypnotic performance, (b) supply a wide range of motor and hypnotic bodily experiences important to performance, and (c) induce alert hypnosis before or during performance. The model is based on the assumption that hypnosis and motor performance share common skills modifiable through training. Similarities between hypnosis and peak performance in the model are also considered. Some predictions are important from theoretical and practical points of view.
STS-38 MS Springer climbs through CCT side hatch prior to egress training
1990-01-01
STS-38 Mission Specialist (MS) Robert C. Springer, wearing launch and entry suit (LES), climbs through the side hatch of the crew compartment trainer (CCT) located in JSC's Mockup and Integration Laboratory (MAIL) Bldg 9A. Springer will practice emergency egress through the side hatch using the crew escape system (CES) pole (at Springer's left). The inflated safety cushion under Springer will break his fall as he rolls out of the side hatch.
Function Analysis of New SpringerLink%新SpringLink平台功能简析
陈漪红; 杨志萍; 郑颖; 王春; 田雅娟
2007-01-01
德国Springer和荷兰Kluwer整合后的新SpringerLink于2006年8月正式上线.新SpringerLink与以前的平台有很大的不同.本文对新SpringerLink平台的特点以及其功能进行了分析.
Isomorph invariance of the structure and dynamics of classical crystals
Albrechtsen, Dan; Olsen, Andreas Elmerdahl; Pedersen, Ulf Rørbæk
2014-01-01
of a defective fcc crystal is also shown to be isomorph invariant. In contrast, a NaCl crystal model does not exhibit isomorph invariances. Other systems simulated, though in less detail, are the Wahnström binary Lennard-Jones crystal with the MgZn2 Laves crystal structure, monatomic fcc crystals of particles......This paper shows by computer simulations that some crystalline systems have curves in their thermodynamic phase diagrams, so-called isomorphs, along which structure and dynamics in reduced units are invariant to a good approximation. The crystals are studied in a classical-mechanical framework......, which is generally a good description except significantly below melting. The existence of isomorphs for crystals is validated by simulations of particles interacting via the Lennard-Jones pair potential arranged into a face-centered cubic (fcc) crystalline structure; the slow vacancy-jump dynamics...
Quick Mining of Isomorphic Exact Large Patterns from Large Graphs
Almasri, Islam
2014-12-01
The applications of the sub graph isomorphism search are growing with the growing number of areas that model their systems using graphs or networks. Specifically, many biological systems, such as protein interaction networks, molecular structures and protein contact maps, are modeled as graphs. The sub graph isomorphism search is concerned with finding all sub graphs that are isomorphic to a relevant query graph, the existence of such sub graphs can reflect on the characteristics of the modeled system. The most computationally expensive step in the search for isomorphic sub graphs is the backtracking algorithm that traverses the nodes of the target graph. In this paper, we propose a pruning approach that is inspired by the minimum remaining value heuristic that achieves greater scalability over large query and target graphs. Our testing on various biological networks shows that performance enhancement of our approach over existing state-of-the-art approaches varies between 6x and 53x. © 2014 IEEE.
Isomorphisms between the coherent models of the lambda-calculus
蒋颖
1996-01-01
It is proved that there exists a formula of first-order logic with only one non-logical symbol, a binary function symbol Ap signifying application, which uniformly defines inclusion in all BF(E)-models Some definability results give an isomorphism between the group of bi-stable Ap -automorphisms of A and the group of permutations of A; it also implies that each BF(E)-model is determined, up to isomorphism, by the cardinal of its set of atoms.
The Farrell-Jones Isomorphism Conjecture in K-Theory
Morteo, Marcelo Gomez
2012-01-01
We prove that the Farrell-Jones isomorphism conjecture for non connective K theory for a discrete group G and a coefficient ring R holds true if G belongs to the class of groups acting on trees under certain conditions on G and if R is either regular or hereditary, depending on the structure of G. It is known that these groups verify the isomorphism conjecture if finitely generated for any coefficient ring, but in this article G may not be finitely generated.
USE OF EIGENVECTOR CENTRALITY TO DETECT GRAPH ISOMORPHISM
Natarajan Meghanathan
2015-11-01
Full Text Available Graph Isomorphism is one of the classical problems of graph theory for which no deterministic polynomial-time algorithm is currently known, but has been neither proven to be NP-complete. Several heuristic algorithms have been proposed to determine whether or not two graphs are isomorphic (i.e., structurally the same. In this research, we propose to use the sequence (either the non-decreasing or nonincreasing order of eigenvector centrality (EVC values of the vertices of two graphs as a precursor step to decide whether or not to further conduct tests for graph isomorphism. The eigenvector centrality of a vertex in a graph is a measure of the degree of the vertex as well as the degrees of its neighbors. We hypothesize that if the non-increasing (or non-decreasing order of listings of the EVC values of the vertices of two test graphs are not the same, then the two graphs are not isomorphic. If two test graphs have an identical non-increasing order of the EVC sequence, then they are declared to be potentially isomorphic and confirmed through additional heuristics. We test our hypothesis on random graphs (generated according to the Erdos-Renyi model and we observe the hypothesis to be indeed true: graph pairs that have the same sequence of non-increasing order of EVC values have been confirmed to be isomorphic using the well-known Nauty software.
Springer-Verlag history of a scientific publishing house
Sarkowski, Heinz
1996-01-01
This book describes the fortunes and activities of one of the few specialist publishing houses still in the hands of the same family that established it over 150 years ago and with it gives a portrayal of those members who directed it. In doing so it covers a period of momentous historical events that directly and indirectly shaped the firm's actions and achievements. But this volume tells not only, in word and picture, the story of Springer-Verlag but also, interwoven with it, the story of publishing in Germany over the span of a hundred years. The text, densely packed with carefully researched facts and figures, is illuminated and supplemented by many illustrations whose captions, together with the author's notes, contain a wealth of important and interesting information. A second volume contains the history of the publishing house from 1945 to 1992.
Hausdorff measures of different dimensions are isomorphic under the Continuum Hypothesis
Elekes, Márton
2011-01-01
We show that the Continuum Hypothesis implies that for every $0
无
2001-01-01
The spanning tree method of identifying isomorphism and topological symmetry to planar kinematic chain with multiple joint is presented. Directly using the kinematic-chain’s structural graph in the mechanism motion sketch or its inversion,the connected relations of components and joints can be presented through the spanning tree constructed by Depth-First traversal the graph and the distribution of back-edge. Then, whether two graph isomorphism and components’topological symmertry can be identified through comparing the structural characteristic of spanning tree and the distribution characteristic of back-edge. The study shows that the method is effective, directly perceptible, simple and convenient, and easily dealt with by computer.
State Isomorphism in the Post-Socialist Transition
Ioannis Kyvelidis
2000-02-01
Full Text Available With the collapse of the communist regimes, the post-socialist countries are facing the problem of building new legal and institutional systems which will adequately address the needs of the markets. They also try to implement new reforms. But the transition towards economic and market reforms across the bloc has been very uneven, producing the countries-winners, countries-laggards, and countries-losers. There have been some attempts to explain that unevenness from the temporal path dependency perspective and from geographic proximity perspective. Can we explain this unevenness better drawing upon the theory of institutional isomorphism? This paper is not ambitious and built exclusively on literature review. It attempts to borrow from some middle-range social theories of institution building and, especially, the theory of institutional isomorphism by DiMaggio and Powell. It shows that some parts of the bloc seem to be surprisingly isomorphic. The paper suggests an explanation of the possible causes and applicability of the phenomenon of isomorphism in the post-Soviet bloc. In particular, it: 1 contrasts the facts of the transformation with the theory of institutional and organizational isomorphism, 2 makes a fair causal comparison with other explanations, 3 claims the adequate causal depth for the explanation, 4 points at an adequate causal mechanism of the transformation.
STS-38 Mission Specialist (MS) Robert C. Springer dons EMU in JSC's WETF
1990-01-01
STS-38 Mission Specialist (MS) Robert C. Springer, wearing extravehicular mobility unit (EMU), fastens the strap on his communications carrier assembly (CCA) cap during suit donning in JSC's Weightless Environment Training Facility (WETF) Bldg 29. Positioned on the WETF platform at pool side, Springer is preparing for an underwater extravehicular activity (EVA) simulation. During the training exercise, Springer will rehearse contingency EVA procedures for the STS-38 mission aboard Atlantis, Orbiter Vehicle (OV) 104.
STS-38 Mission Specialist (MS) Robert C. Springer dons EMU in JSC's WETF
1990-01-01
STS-38 Mission Specialist (MS) Robert C. Springer dons extravehicular mobility unit (EMU) upper torso with technicians' assistance in JSC's Weightless Environment Training Facility (WETF) Bldg 29. Positioned on the WETF platform at pool side, Springer is preparing for an underwater extravehicular activity (EVA) simulation. During the training session, Springer will rehearse contingency EVA procedures for the STS-38 mission aboard Atlantis, Orbiter Vehicle (OV) 104.
From Planck Constant to Isomorphicity Through Justice Paradox
Hidajatullah-Maksoed, Widastra
2015-05-01
Robert E. Scott in his ``Chaos theory and the Justice Paradox'', William & Mary Law Review, v 35, I 1, 329 (1993) wrotes''...As we approach the 21-st Century, the signs of social disarray are everywhere. Social critics observe the breakdown of core structure - the nuclear family, schools, neighborhoods & political groups''. For completions for ``soliton'' first coined by Morikazu TODA, comparing the ``Soliton on Scott-Russell aqueduct on the Union Canal near Heriot-WATT University, July 12, 1995 to Michael Stock works: ``a Fine WATT-Balance: Determination of Planck constant & Redefinition of Kilogram'', January 2011, we can concludes the inherencies between `chaos' & `soliton'. Further through ``string theory'' from Michio KAKU sought statements from Peter Mayr: Stringy world brane & Exponential hierarchy'', JHEP 11 (2000): ``if the 5-brane is embedded in flat 10-D space time, the 6-D Planck mass on the brane is infinite'' who also describes the relation of isomorphicity & ``string theory'', from whom denotes the smart city. Replace this text with your abstract body. Incredible acknowledgments to HE. Mr. Drs. P. SWANTORO & HE. Mr. Dr-HC Jakob OETAMA.
曾纯
2003-01-01
@@ 随着互联网在我国的飞速发展和普及,网上的电子期刊及全文数据库得到了广泛的使用.虽然这类网上的服务大部分是有偿服务,但它的投入相对于订购印刷版期刊要便宜很多,特别是与原版的外文科技期刊比较而言其价格优势则更加明显.同时它还有更新速度快,交流便捷[1],易于管理,使用方便,不受时间和地点的限制等优点[2].因此,成为很多中小型图书馆的首选,作为获取外文科技资料的方法之一.笔者所在单位从2002年底开始引进德国施普林格(Springer-Verlag)公司的全文数据库.此数据库的引进极大地丰富了馆藏资源,增加了用户获取一次文献的途径.
STS-29 Discovery, OV-103, MS Springer on JSC crew compartment trainer middeck
1989-01-01
STS-29 Discovery, Orbiter Vehicle (OV) 103, Mission Specialist (MS) Robert C. Springer, wearing navy blue launch and entry suit (LES) and launch and entry helmet (LEH), participates in JSC crew compartment trainer (CCT) exercises. MS Springer is seated in mission specialist seat on CCT middeck, the position he will occupy during the entry phase of flight. Behind Springer is the closed airlock hatch and stowed treadmill. The crew escape system (CES) pole extends overhead from starboard wall to side hatch. On Springer's left is the galley. CCT is located in JSC Mockup and Integration Laboratory Bldg 9A. Photo was taken by Bill Bowers of JSC.
QAPV: a polynomial invariant for graph isomorphism testing
Valdir Agustinho de Melo
2013-08-01
Full Text Available To each instance of the Quadratic Assignment Problem (QAP a relaxed instance can be associated. Both variances of their solution values can be calculated in polynomial time. The graph isomorphism problem (GIP can be modeled as a QAP, associating its pair of data matrices with a pair of graphs of the same order and size. We look for invariant edge weight functions for the graphs composing the instances in order to try to find quantitative differences between variances that could be associated with the absence of isomorphism. This technique is sensitive enough to show the effect of a single edge exchange between two regular graphs of up to 3,000 vertices and 300,000 edges with degrees up to 200. Planar graph pairs from a dense family up to 300,000 vertices were also discriminated. We conjecture the existence of functions able to discriminate non-isomorphic pairs for every instance of the problem.
Surface Split Decompositions and Subgraph Isomorphism in Graphs on Surfaces
Bonsma, Paul
2011-01-01
The Subgraph Isomorphism problem asks, given a host graph G on n vertices and a pattern graph P on k vertices, whether G contains a subgraph isomorphic to P. The restriction of this problem to planar graphs has often been considered. After a sequence of improvements, the current best algorithm for planar graphs is a linear time algorithm by Dorn (STACS '10), with complexity $2^{O(k)} O(n)$. We generalize this result, by giving an algorithm of the same complexity for graphs that can be embedded in surfaces of bounded genus. At the same time, we simplify the algorithm and analysis. The key to these improvements is the introduction of surface split decompositions for bounded genus graphs, which generalize sphere cut decompositions for planar graphs. We extend the algorithm for the problem of counting and generating all subgraphs isomorphic to P, even for the case where P is disconnected. This answers an open question by Eppstein (SODA '95 / JGAA '99).
Isomorphic Viscosity Equation of State for Binary Fluid Mixtures.
Behnejad, Hassan; Cheshmpak, Hashem; Jamali, Asma
2015-01-01
The thermodynamic behavior of the simple binary mixtures in the vicinity of critical line has a universal character and can be mapped from pure components using the isomorphism hypothesis. Consequently, based upon the principle of isomorphism, critical phenomena and similarity between P-ρ-T and T-η-(viscosity)-P relationships, the viscosity model has been developed adopting two cubic, Soave-Redlich-Kwong (SRK) and Peng-Robinson (PR), equations of state (EsoS) for predicting the viscosity of the binary mixtures. This procedure has been applied to the methane-butane mixture and predicted its viscosity data. Reasonable agreement with the experimental data has been observed. In conclusion, we have shown that the isomorphism principle in conjunction with the mapped viscosity EoS suggests a reliable model for calculating the viscosity of mixture of hydrocarbons over a wide pressure range up to 35 MPa within the stated experimental errors.
Technology in the Marketing Activities of Schools as an Example to Institutional Isomorphism
B. Çağla Garipağaoğlu
2013-08-01
Full Text Available The purpose of this study is to understand and explore the isomorphic changes in the private school chain sector in Turkey over the last five years regarding the effects of recent technology adoptions for school marketing activities. Qualitative research model was used and the two largest school chains were selected with concept sampling strategy. To collect data, we interviewed the chief marketing officers of the two selected school chains by using a semi-structured interview guideline. The data was analyzed by using content analysis. The results of the study provide a relatively new perspective based on the concept of institutional isomorphism to the use of technologies for marketing purposes (both as a marketing tool and a marketing product in the private school chain sector. The results show that technology is a powerful marketing product, which is used by schools as a marketing strategy, as well. This eventually leads to convergence of learning environments in different schools. Technology is considered to be a powerful tool for marketing school’s activities, as well, and this power is acknowledged by both school chains. Similarly, use of technology as a marketing tool becomes an isomorphic force for the two competing schools.
Principal Bundles whose Restrictions to a Curve are Isomorphic
Sudarshan Rajendra Gurjar
2011-05-01
Let be a normal projective variety defined over an algebraically closed field . Let $|O_X(1)|$ be a very ample invertible sheaf on . Let be an affine algebraic group defined over . Let $E_G$ and $F_G$ be two principal -bundles on . Then there exists an integer $n \\gg 0$ (depending on $E_G$ and $F_G$) such that if the restrictions of $E_G$ and $F_G$ to a curve $C\\in |O_X(n)|$ are isomorphic, then they are isomorphic on all of .
STS-38 MS Springer on OV-104's flight deck with Navy banner and Marine decal
1990-01-01
STS-38 Mission Specialist (MS) Robert C. Springer stretches out in front of the forward flight deck control panels onboard Atlantis, Orbiter Vehicle (OV) 104. Springer poses with a 'Semper Fi United States Marines' decal and a U.S. Naval Academy banner. A HASSELBLAD camera freefloats in front of his chest.
STS-38 Mission Specialist (MS) Springer uses camera on OV-104 aft flight deck
1990-01-01
STS-38 Mission Specialist (MS) Robert C. Springer, holding HASSELBLAD camera, positions himself under aft flight deck overhead window W7 before recording the Earth's surface below. Behind Springer are Atlantis', Orbiter Vehicle (OV) 104's, onorbit station and aft flight deck viewing windows.
Phenomenon of isomorphic provoking responses in cases of limited scleroderma
Talnikova Е.Е.
2015-09-01
Full Text Available The article presents the historical origin of the term "Koebner phenomenon". The literature data reflect the etiology, pathogenesis and epidemiology of isomorphic mechanisms provoking responses in lichen planus, psoriasis, scleroder-ma, syphilis. Variants of the Koebner phenomenon's classifications are given. The clinical cases of limited scleroderma after mechanical injury are described.
Riesz Isomorphisms of Tensor Products of Order Unit Banach Spaces
T S S R K Rao
2009-06-01
In this paper we formulate and prove an order unit Banach space version of a Banach–Stone theorem type theorem for Riesz isomorphisms of the space of vector-valued continuous functions. Similar results were obtained recently for the case of lattice-valued continuous functions in [5] and [6].
Mbirika, Aba
2009-01-01
The Springer variety is the set of flags stabilized by a nilpotent operator. In 1978, T.A. Springer observed this variety's cohomology carries a symmetric group action, and he offered a deep geometric construction. Fourteen years later, Garsia and Procesi made Springer's work more transparent and accessible by presenting it as a graded quotient of a polynomial ring. They combinatorially describe an explicit basis for this quotient. The goal of this paper is to generalize their work. Our main result deepens their analysis of Springer varieties and extends it to a family of varieties called Hessenbergs, a two-parameter generalization of Springer varieties. Little is known about their cohomology. For the class of regular nilpotent Hessenbergs, we conjecture a quotient presentation for this ring and exhibit an explicit basis. Tantalizing new evidence supports our conjecture for a subclass of regular nilpotent varieties called Peterson varieties.
On Isomorphism Testing of Groups with Normal Hall Subgroups
You-Ming Qiao; Jayalal Sarma M.N.; Bang-Sheng Tang
2012-01-01
A normal Hall subgroup N of a group G is a normal subgroup with its order coprime with its index.Schur-Zassenhaus theorem states that every normal Hall subgroup has a complement subgroup,that is a set of coset representatives H which also forms a subgroup of G.In this paper,we present a framework to test isomorphism of groups with at least one normal Hall subgroup,when groups are given as multiplication tables.To establish the framework,we first observe that a proof of Schur-Zassenhaus theorem is constructive,and formulate a necessary and sufficient condition for testing isomorphism in terms of the associated actions of the semidirect products,and isomorphisms of the normal parts and complement parts.We then focus on the case when the normal subgroup is abelian.Utilizing basic facts of representation theory of finite groups and a technique by Le Gall (STACS 2009),we first get an efficient isomorphism testing algorithm when the complement has bounded number of generators.For the case when the complement subgroup is elementary abelian,which does not necessarily have bounded number of generators,we obtain a polynomial time isomorphism testing algorithm by reducing to generalized code isomorphism problem,which asks whether two linear subspaces are the same up to permutation of coordinates.A solution to the latter can be obtained by a mild extension of the singly exponential (in the number of coordinates) time algorithm for code isomorphism problem developed recently by Babai et al.(SODA 2011).Enroute to obtaining the above reduction,we study the following computational problem in representation theory of finite groups:given two representations ρ and τ of a group H over Zpd,p a prime,determine if there exists an automorphism φ:H → H,such that the induced representation ρφ =ρоφ and τ are equivalent,in time poly(ㄧHㄧ,pd).
Full-text Indexing Of All Springer Astronomy And Physics Journals In The ADS
Eichhorn, Guenther; Blom, H.; Accomazzi, A.
2011-05-01
Springer, as a publisher of scientific and technical literature, has been collaborating with the ADS since the very beginning of the ADS Abstract Service. Once of the culminations of this collaboration was the scanning of all back issues of Solar Physics. We are now in the process of enabling full text searching of all Springer journals in Astronomy and Physics through the ADS. This agreement between Springer and the ADS will be based on a similar agreement between Springer and INSPIRE. That agreement allows full text searching of Springer High Energy Physics journals in SPIRES and its successor INSPIRE, a database of the High Energy Physics literature developed and managed by a collaboration between CERN, DESY, Fermilab, and SLAC. Springer will provide the full text of all the Astronomy and Physics journals to the ADS for indexing. Display of search results will include snippets of text that includes the search terms, to allow the user to immediately see the context of the searched terms in the articles. Such a full text search will allow greatly enhanced search functionality and should allow much more detailed and in-depth searches of the relevant literature at Springer, one of the largest publishers of scientific-technical literature. We are currently in the process to determine whether this full text search capability can be extended to scientific books as well.
对SpringerLink数据库现状的调查分析%Survey and Analysis of SpringerLink Database Resource
韩维柱; 汪建中; 孙鸿
2008-01-01
通过对SpringerLink数据库资源进行调查和统计分析,本文对数据库的特色和侧重点及其学科覆盖、能检索到的全文数据在数据库资源所占的比率等都予以揭示,并对SpringerLink数据库资源与大多数高校引进其他的数据库的资源重复率做了一个比较.
BB-Graph: A New Subgraph Isomorphism Algorithm for Efficiently Querying Big Graph Databases
Asiler, Merve; Yazıcı, Adnan
2017-01-01
With the emergence of the big data concept, the big graph database model has become very popular since it provides strong modeling for complex applications and fast querying, especially for the cases that require costly join operations in RDBMs. However, it is a big challenge to find all exact matches of a query graph in a big graph database, which is known as the subgraph isomorphism problem. Although a number of related studies exist in literature, there is need for a better algorithm that ...
Homology and isomorphism: Bourdieu in conversation with New Institutionalism.
Wang, Yingyao
2016-06-01
Bourdieusian Field Theory (BFT) provided decisive inspiration for the early conceptual formulation of New Institutionalism (NI). This paper attempts to reinvigorate the stalled intellectual dialogue between NI and BFT by comparing NI's concept of isomorphism with BFT's notion of homology. I argue that Bourdieu's understanding of domination-oriented social action, transposable habitus, and a non-linear causality, embodied in his neglected concept of homology, provides an alternative theorization of field-level convergence to New Institutionalism's central idea of institutional isomorphism. To showcase how BFT can be useful for organizational research, I postulate a habitus-informed and field-conditioned theory of transference to enrich NI's spin-off thesis of 'diffusion'. I propose that while NI can benefit from BFT's potential of bringing social structure back into organizational research, BFT can enrich its social analysis by borrowing from NI's elaboration of the symbolic system of organizations.
Graphs whose Complement and Square are Isomorphic (extended version)
Pedersen, Anders Sune; Milanic, Martin; Verret, Gabriel
2013-01-01
We study square-complementary graphs, that is, graphs whose comple- ment and square are isomorphic. We prove several necessary conditions for a graph to be square-complementary, describe ways of building new square-complementary graphs from existing ones, construct innite families of square......-complementary graphs, and characterize square-complementary graphs within various graph classes. The bipartite case turns out to be of particular interest....
On the constructions of Tits and Faulkner: an isomorphism theorem
Sudhir R. Nath
2001-01-01
between any two E8's, at least over an algebraically closed field of characteristic 0. The purpose of this paper is to construct for any Jordan algebra J of degree 3 over a field Φ of characteristic ≠2,3 an explicit isomorphism between the algebra obtained from J by Faulkner's construction and the algebra obtained from the split octonions and J by Tits construction.
Isomorphism and solid solutions among Ag- and Au-selenides
Palyanova, Galina A.; Seryotkin, Yurii V. [Sobolev Institute of Geology and Mineralogy, Novosibirsk (Russian Federation); Novosibirsk State University (Russian Federation); Kokh, Konstantin A., E-mail: k.a.kokh@gmail.com [Sobolev Institute of Geology and Mineralogy, Novosibirsk (Russian Federation); Novosibirsk State University (Russian Federation); Tomsk State University (Russian Federation); Bakakin, Vladimir V. [Nikolaev Institute of Inorganic Chemistry, Novosibirsk (Russian Federation)
2016-09-15
Au-Ag selenides were synthesized by heating stoichiometric mixtures of elementary substances of initial compositions Ag{sub 2−x}Au{sub x}Se with a step of x=0.25 (0≤x≤2) to 1050 °C and annealing at 500 °C. Scanning electron microscopy, optical microscopy, electron microprobe analysis and X-ray powder diffraction methods have been applied to study synthesized samples. Results of studies of synthesized products revealed the existence of three solid solutions with limited isomorphism Ag↔Au: naumannite Ag{sub 2}Se – Ag{sub 1.94}Au{sub 0.06}Se, fischesserite Ag{sub 3}AuSe{sub 2} - Ag{sub 3.2}Au{sub 0.8}Se{sub 2} and gold selenide AuSe - Au{sub 0.94}Ag{sub 0.06}Se. Solid solutions and AgAuSe phases were added to the phase diagram of Ag-Au-Se system. Crystal-chemical interpretation of Ag-Au isomorphism in selenides was made on the basis of structural features of fischesserite, naumannite, and AuSe. - Highlights: • Au-Ag selenides were synthesized. • Limited Ag-Au isomorphism in the selenides is affected by structural features. • Some new phases were introduced to the phase diagram Ag-Au-Se.
Springer Materials: Landolt-Börnstein: guia d'ús [text]. Curs 2015-16
Universitat de Barcelona. CRAI
2015-01-01
Springer Materials és una plataforma web produïda per Springer i basada en les noves sèries de la Landolt-Börnstein, una col·lecció de dades de qualitat garantida a l’àmbit de la química, la física, l’enginyeria i la ciència de materials.
Semantic Ontology Method of Learning Resource based on the Approximate Subgraph Isomorphism
Lili Zhang
2014-02-01
Full Text Available Digital learning resource ontology is often based on different specification building. It is hard to find resources by linguistic ontology matching method. The existing structural matching method fails to solve the problem of calculation of structural similarity well. For the heterogeneity problem among learning resource ontology, an algorithm is presented based on subgraph approximate isomorphism. First of all, we can preprocess the resource of clustering algorithm through the semantic analysis, then describe the ontology by the directed graph and calculate the similarity, and finally judge the semantic relations through calculating and analyzing different resource between the ontology of different learning resource to achieve semantic compatibility or mapping of ontology. This method is an extension of existing methods in ontology matching. Under the comprehensive application of features such as edit distance and hierarchical relations, the similarity of graph structures between two ontologies is calculated. And, the ontology matching is determined on the condition of subgraph approximate isomorphism based on the alternately mapping of nodes and arcs in the describing graphs of ontologies. An example is used to demonstrate this ontology matching process and the time complexity is analyzed to explain its effectiveness
Singh, Chandralekha
2016-01-01
Investigations related to expertise in problem solving and ability to transfer learning from one context to another are important for developing strategies to help students perform more expert-like tasks. Here we analyze written responses to a pair of non-intuitive isomorphic problems given to introductory physics students and discussions with a subset of students about them. Students were asked to explain their reasoning for their written responses. We call the paired problems isomorphic because they require the same physics principle to solve them. However, the initial conditions are different and the frictional force is responsible for increasing the linear speed of an object in one of the problems while it is responsible for decreasing the linear speed in the other problem. We categorize student responses and evaluate student performance within the context of their evolving expertise. We compare and contrast the patterns of student categorization for the two isomorphic problems. We discuss why certain inc...
McRae, Robert
2016-08-01
For a finite-dimensional simple Lie algebra {{g}}, we use the vertex tensor category theory of Huang and Lepowsky to identify the category of standard modules for the affine Lie algebra {{widehat{{g}}}} at a fixed level {ℓin{N}} with a certain tensor category of finite-dimensional {{g}}-modules. More precisely, the category of level ℓ standard {{widehat{{g}}}}-modules is the module category for the simple vertex operator algebra {L_{widehat{{g}}}(ℓ, 0)}, and as is well known, this category is equivalent as an abelian category to {{D}({g},ℓ)}, the category of finite-dimensional modules for the Zhu's algebra {A{(L_{widehat{{g}}}(ℓ, 0))}}, which is a quotient of {U({g})}. Our main result is a direct construction using Knizhnik-Zamolodchikov equations of the associativity isomorphisms in {{D}({g},ℓ)} induced from the associativity isomorphisms constructed by Huang and Lepowsky in {{L_{widehat{{g}}}(ℓ, 0) - {mod}}}. This construction shows that {{D}({g},ℓ)} is closely related to the Drinfeld category of {U({g})}[[h
CORPORATE GOVERNANCE UNDER THE PERSPECTIVE OF ISOMORPHISM: A BMFBOVESPA BANKING INDUSTRY APPROACH
André Aroldo Freitas de Moura
2014-12-01
Full Text Available The study aims to analyze the disclosure of corporate governance practices by the boards of the companies listed in the banking sector of BM&FBovespa, according to the recommendations of the Code of IBGC. Additionally, it was investigated the isomorphic posture in relation to companies that also have shares traded in the New York Stock Exchange. This research was conducted in the study of all 28 financial institutions listed in BM&FBovespa. This research is descriptive, which adopts the documental analysis and uses the technique of content analysis for data treatment. As for the approach or the nature of the study, the research makes use of qualitative and quantitative methods. It was analyzed 41 corporate governance practices recommended by IBGC. It was established a level of disclosure practices adopted for each company, using the following criteria: were assigned the value 1 (one for each disclosed practice and assigned 0 (zero for each practice which was not disclosed or not adopted by the company. The study collected 1148 observations of firms through the recommendations of IBGC. To analyze the results, the corporate governance practices were analyzed in general and segment listing. It was found that the companies have, mostly, low level of disclosure. These companies still have a long way to go to increase transparency and strengthen the capital market to interested users. The isomorphic posture has not been confirmed in this study by the companies of banking sector.
升级版Springer Link全文电子期刊检索方法与技巧%The Search Methods and Tips of Springer Link
谭永钦
2004-01-01
升级版的Springer Link全文电子期刊为广大用户提供了多种新的服务,如快速检索区、最新动态、网页格式的全文形式、书目提醒以及期刊提醒等.本文拟在介绍这些新的服务方式的特点及其使用技巧.
Isomorphism classes and automorphism groups of algebras of Weyl type
SU; Yucai(苏育才); ZHAO; Kaiming(赵开明)
2002-01-01
In one of our recent papers, the associative and the Lie algebras of Weyl type A[D] = A F[D] were defined and studied, where A is a commutative associative algebra with an identity element over a field F of any characteristic, and F[D] is the polynomial algebra of a commutative derivation subalgebra D of A. In the present paper, a class of the above associative and Lie algebras A[D] with F being a field of characteristic 0, D consisting of locally finite but not locally nilpotent derivations of A, are studied. The isomorphism classes and automorphism groups of these associative and Lie algebras are determined.
An Improved Heuristic Method for Subgraph Isomorphism Problem
Xiang, Yingzhuo; Han, Jiesi; Xu, Haijiang; Guo, Xin
2017-09-01
This paper focus on the subgraph isomorphism (SI) problem. We present an improved genetic algorithm, a heuristic method to search the optimal solution. The contribution of this paper is that we design a dedicated crossover algorithm and a new fitness function to measure the evolution process. Experiments show our improved genetic algorithm performs better than other heuristic methods. For a large graph, such as a subgraph of 40 nodes, our algorithm outperforms the traditional tree search algorithms. We find that the performance of our improved genetic algorithm does not decrease as the number of nodes in prototype graphs.
Isomorphic phase transformation in shocked Cerium using molecular dynamics
Germann T.C.; Chen S.-P.; Dupont V.
2011-01-01
Cerium (Ce) undergoes a significant (∼16%) volume collapse associated with an isomorphic fcc-fcc phase transformation when subject to compressive loading. We present here a new Embedded Atom Method (EAM) potential for Cerium that models two minima for the two fcc phases. We show results from its use in Molecular Dynamics (MD) simulations of Ce samples subjected to shocks with pressures ranging from 0.5 to 25 GPa. A split wave structure is observed, with an elastic precursor followed by a plas...
Springer Link及其收录的医学期刊分析%Analysis of Springer Link and its Medical Journals
祖云霞; 朱佳鸣; 唐权; 崔冰洋; 陈卫红
2003-01-01
目的向图书馆员和用户介绍Springer Link,对其收录的医学期刊进行深入分析,使该数据库得到更好的利用.方法利用和美国(IM)的等对Springer Link收录的英文医学期刊从权威性、出版地分布、学科分布和收藏年限等方面进行考查.结果 86%的期刊被IM引用,欧洲--尤其是德国的期刊较多,医学各学科都有相应的期刊被收录,但数量分布不均,有所偏重,72.7%的期刊可以保证至少近5年或自创刊以来的文献.结论 Springer Link所提供的全文医学期刊服务质量较上乘,并有自己的特色.
News from the Library: Springer e-books in Engineering and Mathematics - now at your desktop!
CERN Library
2013-01-01
Users obviously expect library collections to be shaped to meet their information needs. Today, online systems have replaced the good old "Book Suggestion Register" to help readers provide libraries with input. Moreover, e-books lend themselves by their nature to a trial period, whereby the needs and the potential usage of collections can be effectively measured. In this sense, the trial of Springer e-books on engineering done in October-November last year was extremely fruitful because it showed the interest of the community and provided us with essential feedback. Following that trial, the Library now provides access to a collection of Springer e-books on Engineering published in 2012 and 2013 and also on Mathematics (2010-2013). These collections complement the Springer Physics and Astronomy and "Lecture Notes in Physics" e-books series. As usual, your feedback is most welcome! Please contact us by e-mail.
Chandralekha Singh
2008-03-01
Full Text Available In this paper, we explore the use of isomorphic problem pairs (IPPs to assess introductory physics students’ ability to solve and successfully transfer problem-solving knowledge from one context to another in mechanics. We call the paired problems “isomorphic” because they require the same physics principle to solve them. We analyze written responses and individual discussions for a range of isomorphic problems. We examine potential factors that may help or hinder transfer of problem-solving skills from one problem in a pair to the other. For some paired isomorphic problems, one context often turned out to be easier for students in that it was more often correctly solved than the other. When quantitative and conceptual questions were paired and given back to back, students who answered both questions in the IPP often performed better on the conceptual questions than those who answered the corresponding conceptual questions only. Although students often took advantage of the quantitative counterpart to answer a conceptual question of an IPP correctly, when only given the conceptual question, students seldom tried to convert it into a quantitative question, solve it, and then reason about the solution conceptually. Even in individual interviews when students who were given only conceptual questions had difficulty and the interviewer explicitly encouraged them to convert the conceptual question into the corresponding quantitative problem by choosing appropriate variables, a majority of students were reluctant and preferred to guess the answer to the conceptual question based upon their gut feeling. Misconceptions associated with friction in some problems were so robust that pairing them with isomorphic problems not involving friction did not help students discern their underlying similarities. Alternatively, from the knowledge-in-pieces perspective, the activation of the knowledge resource related to friction was so strongly and automatically
Chandralekha Singh
2008-03-01
Full Text Available In this paper, we explore the use of isomorphic problem pairs (IPPs to assess introductory physics students’ ability to solve and successfully transfer problem-solving knowledge from one context to another in mechanics. We call the paired problems “isomorphic” because they require the same physics principle to solve them. We analyze written responses and individual discussions for a range of isomorphic problems. We examine potential factors that may help or hinder transfer of problem-solving skills from one problem in a pair to the other. For some paired isomorphic problems, one context often turned out to be easier for students in that it was more often correctly solved than the other. When quantitative and conceptual questions were paired and given back to back, students who answered both questions in the IPP often performed better on the conceptual questions than those who answered the corresponding conceptual questions only. Although students often took advantage of the quantitative counterpart to answer a conceptual question of an IPP correctly, when only given the conceptual question, students seldom tried to convert it into a quantitative question, solve it, and then reason about the solution conceptually. Even in individual interviews when students who were given only conceptual questions had difficulty and the interviewer explicitly encouraged them to convert the conceptual question into the corresponding quantitative problem by choosing appropriate variables, a majority of students were reluctant and preferred to guess the answer to the conceptual question based upon their gut feeling. Misconceptions associated with friction in some problems were so robust that pairing them with isomorphic problems not involving friction did not help students discern their underlying similarities. Alternatively, from the knowledge-in-pieces perspective, the activation of the knowledge resource related to friction was so strongly and automatically
THE ALGORITHM OF ISOMORPHOUS INVESTMENT OF THE ALGORITHMIC NETWORKS
V. E. Marlei
2014-01-01
Full Text Available The problem of reducing the barrier between the user and the computer appeared immediately, as there were computers, and remains relevant in the present time. This problem is formulated as the task of developing a user-friendly interface. One way of solving this problem is the use of graphical representation, which can really reduce the barrier between human and computer. In this series stands and algorithmic formalism networks intended to describe algorithmic models proposed by V.V. Iaanishchev about 30 years ago. Under algorithmic model refers to a formalized description of the scenario subject specialist for the simulated process, the structure of which is comparable with the structure of the causal and temporal relationships between phenomena simulated process, together with all information necessary for its software implementation. This article is devoted to the definition of isomorphous investment of the algorithmic networks and description of conversions for implementation, using principle to division vertices into classes. Also in this article presented and described approach end algorithm to identification of isomorphism algorithmic networks in detail and its using for base of algorithmic models.
Experimental quantum annealing: case study involving the graph isomorphism problem.
Zick, Kenneth M; Shehab, Omar; French, Matthew
2015-06-08
Quantum annealing is a proposed combinatorial optimization technique meant to exploit quantum mechanical effects such as tunneling and entanglement. Real-world quantum annealing-based solvers require a combination of annealing and classical pre- and post-processing; at this early stage, little is known about how to partition and optimize the processing. This article presents an experimental case study of quantum annealing and some of the factors involved in real-world solvers, using a 504-qubit D-Wave Two machine and the graph isomorphism problem. To illustrate the role of classical pre-processing, a compact Hamiltonian is presented that enables a reduced Ising model for each problem instance. On random N-vertex graphs, the median number of variables is reduced from N(2) to fewer than N log2 N and solvable graph sizes increase from N = 5 to N = 13. Additionally, error correction via classical post-processing majority voting is evaluated. While the solution times are not competitive with classical approaches to graph isomorphism, the enhanced solver ultimately classified correctly every problem that was mapped to the processor and demonstrated clear advantages over the baseline approach. The results shed some light on the nature of real-world quantum annealing and the associated hybrid classical-quantum solvers.
Breaking the n^(log n) Barrier for Nilpotent-Group Isomorphism
Rosenbaum, David
2012-01-01
We consider the group isomorphism problem: given two finite groups G and H specified by their multiplication tables, decide if G \\cong H. The n^(log n) barrier for group isomorphism has withstood all attacks - even for the special cases of p-groups and nilpotent groups - ever since Tarjan's n^(log n + O(1)) algorithm. In this work, we present the first significant improvement over n^(\\log n) by showing that group isomorphism is n^((1 / 2) log_p n + O(1)) Turing reducible to composition-series isomorphism where p is the smallest prime dividing the order of the group. Combining our reduction with an n^(O(log n / log log n)) algorithm for p-group composition-series isomorphism, we obtain an n^((1 / 2) log_p n + O(log n / log log n)) algorithm for p-group isomorphism and an n^((1 / 2) log n + O(log n / log log n)) algorithm for nilpotent-group isomorphism. Finally, we show a new relationship between group isomorphism and the birthday problem which allows us replace the 1 / 2 in the exponents with 1 / 4 using rand...
Isomorphisms of types in the presence of higher-order references
Clairambault, Pierre
2011-01-01
We investigate the problem of type isomorphisms in a programming language with higher-order references. We first recall the game-theoretic model of higher-order references by Abramsky, Honda and McCusker. Solving an open problem by Laurent, we show that two finitely branching arenas are isomorphic if and only if they are geometrically the same, up to renaming of moves (Laurent's forest isomorphism). We deduce from this an equational theory characterizing isomorphisms of types in a finitary language with higher order references. We show however that Laurent's conjecture does not hold on infinitely branching arenas, yielding a non-trivial type isomorphism in the extension of this language with natural numbers.
The N-Isometric Isomorphisms in Linear N-Normed C*-Algebras
Chun-Gil PARK; Themistocles M. RASSIAS
2006-01-01
We prove the Hyers-Ulam stability of linear N-isometries in linear N-normed Banach modules over a unital C*-algebra. The main purpose of this paper is to investigate N-isometric C*-algebra isomorphisms between linear N-normed C*-algebras, N-isometric Poisson C*-algebra isomorphisms between linear N-normed Poisson C*-algebras, N-isometric Lie C*-algebra isomorphisms between linear N-normed Lie C*-algebras, N-isometric Poisson JC*-algebra isomorphisms between linear N-normed Poisson JC*-algebras, and N-isometric Lie JC*-algebra isomorphisms between linear N-normed Lie JC*-algebras.Moreover, we prove the Hyers-Ulam stability of their N-isometric homomorphisms.
Semi-groupe de Vinberg, centralisateur r\\'egulier et fibres de Springer affines
Bouthier, Alexis
2012-01-01
Following Steinberg, we construct an adjoint quotient for the Vinberg semi-group and a section to this quotient. Then, after Ng\\^o, we show the existence of a regular centralizer on it and use it to compute the affine Springer fibers for groups.
Tijdschriften na 1 januari 2005. Elsevier Science, Wiley, Springer/Kluwer
Klugkist, A.C.; Laarhoven, Peter van
2004-01-01
In aflevering 3 van deze jaargang van Pictogram hebben wij de aandacht gericht op de toen komende onderhandelingen met Elsevier Science, Wiley en Springer/Kluwer over de verlenging van de zogenaamde pakketlicenties. Zoals de meesten bekend is, zijn de faculteiten en de UB sinds 2000/2001 geabonneerd
Springer Materials. Landolt-Börnstein: guia ràpida. Abril 2015
Universitat de Barcelona. CRAI
2015-01-01
Plataforma web, produïda per Springer, basada en les noves sèries de la Landolt-Börnstein, una col·lecció de dades de qualitat garantida a l’àmbit de la química, física, enginyeria i ciència de materials
Isomorphism testing and display of symmetries in dynamic trees
Siu-Wing Cheng; Moon-Pun Ng [Hong Kong Univ. of Science and Technology (Hong Kong)
1996-12-31
We describe data structures for maintaining a set of trees so that isomorphism testing for any two trees can be performed in O(1) time. Updates include inserting an edge to merge two trees or removing an edge to split a tree into two smaller trees. Each update can be performed in O(log{sup 2} n log m log* m) time, where n is the total size of trees involved and m is the number of updates performed so far. The space needed per update is O(log{sup 2} n(log*m + log n)). We apply this result to display symmetries in dynamic free trees. A framework for dynamic symmetric drawing of free trees is developed, which supports the drawing of subtrees in an output-sensitive manner.
Isomorphic phase transformation in shocked Cerium using molecular dynamics
Germann T.C.
2011-01-01
Full Text Available Cerium (Ce undergoes a significant (∼16% volume collapse associated with an isomorphic fcc-fcc phase transformation when subject to compressive loading. We present here a new Embedded Atom Method (EAM potential for Cerium that models two minima for the two fcc phases. We show results from its use in Molecular Dynamics (MD simulations of Ce samples subjected to shocks with pressures ranging from 0.5 to 25 GPa. A split wave structure is observed, with an elastic precursor followed by a plastic wave. The plastic wave causes the expected fcc-fcc phase transformation. Comparisons to experiments and MD simulations on Cesium (Cs indicate that three waves could be observed. The construction of the EAM potential may be the source of the difference.
Isomorphic phase transformation in shocked cerium using molecular dynamics
Dupont, Virginie [Los Alamos National Laboratory; Germann, Timothy C [Los Alamos National Laboratory; Chen, Shao - Ping [Los Alamos National Laboratory
2010-08-12
Cerium (Ce) undergoes a significant ({approx}16%) volume collapse associated with an isomorphic fcc-fcc phase transformation when subject to compressive loading. We present here a new Embedded Atom Method (EAM) potential for Cerium that models two minima for the two fcc phases. We show results from its use in Molecular Dynamics (MD) simulations of Ce samples subjected to shocks with pressures ranging from 0.5 to 25 GPa. A split wave structure is observed, with an elastic precursor followed by a plastic wave. The plastic wave causes the expected fcc-fcc phase transformation. Comparisons to experiments and MD simulations on Cesium (Cs) indicate that three waves could be observed. The construction of the EAM potential may be the source of the difference.
Vasco Manuel Nobre de Carvalho da Silva Vieira
Full Text Available Isomorphic biphasic algal life cycles often occur in the environment at ploidy abundance ratios (Haploid:Diploid different from 1. Its spatial variability occurs within populations related to intertidal height and hydrodynamic stress, possibly reflecting the niche partitioning driven by their diverging adaptation to the environment argued necessary for their prevalence (evolutionary stability. Demographic models based in matrix algebra were developed to investigate which vital rates may efficiently generate an H:D variability at a fine spatial resolution. It was also taken into account time variation and type of life strategy. Ploidy dissimilarities in fecundity rates set an H:D spatial structure miss-fitting the ploidy fitness ratio. The same happened with ploidy dissimilarities in ramet growth whenever reproductive output dominated the population demography. Only through ploidy dissimilarities in looping rates (stasis, breakage and clonal growth did the life cycle respond to a spatially heterogeneous environment efficiently creating a niche partition. Marginal locations were more sensitive than central locations. Related results have been obtained experimentally and numerically for widely different life cycles from the plant and animal kingdoms. Spore dispersal smoothed the effects of ploidy dissimilarities in fertility and enhanced the effects of ploidy dissimilarities looping rates. Ploidy dissimilarities in spore dispersal could also create the necessary niche partition, both over the space and time dimensions, even in spatial homogeneous environments and without the need for conditional differentiation of the ramets. Fine scale spatial variability may be the key for the prevalence of isomorphic biphasic life cycles, which has been neglected so far.
Prevalence and progression of pectinate ligament dysplasia in the Welsh springer spaniel.
Oliver, J A C; Ekiri, A; Mellersh, C S
2016-08-01
To determine the prevalence of pectinate ligament dysplasia in a large group of Welsh springer spaniels; to investigate associations between pectinate ligament dysplasia and age, sex and intraocular pressure and between intraocular pressure and age and sex; and to investigate progression of pectinate ligament dysplasia in individual dogs. In a prospective study, gonioscopy was performed in both eyes of 227 Welsh springer spaniels and intraocular pressure measured by rebound tonometry. Eyes were classified as "unaffected" if 0% of the iridocorneal angle was affected with pectinate ligament dysplasia (grade 0), "mildly affected" if 90% was affected (grade 3). In a retrospective study, progression of pectinate ligament dysplasia over time was investigated for 65 dogs. One hundred and thirty-nine of 227 dogs (61·2%) were affected by pectinate ligament dysplasia (grades 1 to 3) and 82/227 (36·2%) were moderately or severely affected. There was a significant association between pectinate ligament dysplasia and age. There were no associations between pectinate ligament dysplasia and intraocular pressure or pectinate ligament dysplasia and sex. Thirty-five of 65 dogs (53·8%) demonstrated progression of pectinate ligament dysplasia. Prevalence of pectinate ligament dysplasia was high despite widespread screening and selection against the condition. Our data indicate that gonioscopic features of pectinate ligament dysplasia can progress in the Welsh springer spaniel. Dogs deemed unaffected at an early age may subsequently be diagnosed with pectinate ligament dysplasia. © 2016 British Small Animal Veterinary Association.
Dickson, D; Shave, R; Rishniw, M; Harris, J; Patteson, M
2016-10-01
To establish transthoracic echocardiographic reference intervals in adult English springer spaniel dogs. Forty-two healthy adult English springer spaniels were prospectively recruited from a general practice population in the UK. Animals were examined twice, at least 12 months apart, to exclude dogs with progressive cardiac disease. Reference intervals were calculated using Box-Cox transformations and specific variables were depicted within an expert consensus range. Relationships of body mass, age and heart rate with cardiac structure and function were examined and functional assessments were compared with previous reports. Reference intervals were compared against published ratiometric indices and allometric scaling models. Thirty-nine dogs contributed to create the reference intervals. Significant relationships with bodyweight, age and heart rate were detected, although low coefficients of determination were found. Fractional shortening values were lower than has been reported in many breeds but Simpson-derived ejection fractions were similar to previously published breed-specific values. Breed-specific reference intervals are reported allowing for more appropriate interpretation of echocardiographic assessments in the English springer spaniel. © 2016 British Small Animal Veterinary Association.
Yanhuo Zou
2016-01-01
Full Text Available Isomorphism identification of kinematic chains is one of the most important and challenging mathematical problems in the field of mechanism structure synthesis. In this paper, a new algorithm to identify the isomorphism of planar multiple joint and gear train kinematic chains has been presented. Firstly, the topological model (TM and the corresponding weighted adjacency matrix (WAM are introduced to describe the two types of kinematic chains, respectively. Then, the equivalent circuit model (ECM of TM is established and solved by using circuit analysis method. The solved node voltage sequence (NVS is used to determine the correspondence of vertices in two isomorphism identification kinematic chains, so an algorithm to identify two specific types of isomorphic kinematic chains has been obtained. Lastly, some typical examples are carried out to prove that it is an accurate, efficient, and easy mathematical algorithm to be realized by computer.
Structural entropy of glassy systems from graph isomorphism.
Zhou, Yuxing; Milner, Scott T
2016-09-21
Configurational entropy plays a central role in thermodynamic scenarios of the glass transition. As a measure of the number of basins in the potential energy landscape, configurational entropy for a glass-forming liquid can be evaluated by explicitly counting distinct inherent structures. In this work, we propose a graph-theory based method to examine local structure and obtain the corresponding entropy of hard-particle systems. Voronoi diagrams of associated clusters are classified using a graph isomorphism algorithm. The statistics of these clusters reveal structural motifs such as icosahedron-like order, and also allow us to calculate the structural entropy SG. We find the structural entropy of an n-particle subsystem grows linearly with n. Thus the structural entropy per particle can be obtained from the slope dSG/dn. Our results are consistent with previous values for configurational entropy obtained via thermodynamic integration. Structural entropies per particle are measured for hard-disk and hard-sphere polydisperse systems, and extrapolated for monodisperse hard disks, all of which are nonzero at the dynamic glass transition.
Discovery of a Complete Isomorphous Series of ZnS-CdS in Nature
无
2004-01-01
@@ Isomorphism is a universal phenomenon, which helps us gain more knowledge about nature.Thanks to the phenomenon,for example, many new species and genera have been identified in plant and animal taxonomy. In geology,however, the complete isomorphous series is quite rare. Among the nearly 100 new minerals discovered over the past two decades, no report has been made on such series.It seems to be more difficult to find it out than to discover a new mineral.
No isomorphism between the affine $\\hat sl(2)$ algebra and the N=2 superconformal algebras
Gato-Rivera, Beatriz
2008-01-01
Since 1999 it became obvious that the would be `isomorphism' between the affine $\\hat sl(2)$ algebra and the N=2 superconformal algebras, proposed by some authors, simply does not work. However, this issue was never properly discussed in the literature and, as a result, some confusion still remains. In this article we finally settle down, clearly and unambiguously, the true facts: there is no isomorphism between the affine $\\hat sl(2)$ algebra and the N=2 superconformal algebras.
Hammami, A.; Mehotra, A.K. [University of Calgary, Calgary, AB (Canada). Dept. of Chemical and Petroleum Engineering
1996-03-01
The liquid-solid phase behaviour and thermal characteristics of n-C{sub 25}H{sub 52} + n-C{sub 28}H{sub 58} and n-C{sub 44}H{sub 90} + n-C{sub 50}H{sub 102} binary systems have been studied using differential scanning calorimetry (d.s.c.). Both the melting and crystallization thermograms for n-C{sub 25}H{sub 52} + n-C{sub 28}H{sub 58} mixtures exhibited two major peaks ({alpha} and {beta}) corresponding to the liquid-solid and solid-solid transitions. Hence, isomorphous solid solutions were formed in these mixtures. The n-C{sub 44}H{sub 90} + n-C{sub 50}H{sub 102} mixtures displayed eutectic or isomorphous behaviour depending on the thermal treatment of prepared samples. A recently proposed model for the non-isothermal crystallization kinetics of pure n-paraffins has been extended to binary mixtures by deriving appropriate mixing rules for the three parameters in the model. Accurate predictions of the onset-of-crystallization temperature for the n-C{sub 25}H{sub 52} + n-C{sub 28}H{sub 58} and the n-C{sub 44}H{sub 90} + n-C{sub 50}H{sub 102} binary systems were obtained at different cooling rates. Predictions of the relative crystallinity in the isomorphous mixtures have been presented and compared with the data. 33 refs., 6 figs., 5 tabs.
Topological isomorphisms of human brain and financial market networks
Petra E Vértes
2011-09-01
Full Text Available Although metaphorical and conceptual connections between the human brain and the financial markets have often been drawn, rigorous physical or mathematical underpinnings of this analogy remain largely unexplored. Here, we apply a statistical and graph theoretic approach to the study of two datasets - the timeseries of 90 stocks from the New York Stock Exchange over a three-year period, and the fMRI-derived timeseries acquired from 90 brain regions over the course of a 10 min-long functional MRI scan of resting brain function in healthy volunteers. Despite the many obvious substantive differences between these two datasets, graphical analysis demonstrated striking commonalities in terms of global network topological properties. Both the human brain and the market networks were non-random, small-world, modular, hierarchical systems with fat-tailed degree distributions indicating the presence of highly connected hubs. These properties could not be trivially explained by the univariate time series statistics of stock price returns. This degree of topological isomorphism suggests that brains and markets can be regarded broadly as members of the same family of networks. The two systems, however, were not topologically identical. The financial market was more efficient and more modular - more highly optimised for information processing - than the brain networks; but also less robust to systemic disintegration as a result of hub deletion. We conclude that the conceptual connections between brains and markets are not merely metaphorical; rather these two information processing systems can be rigorously compared in the same mathematical language and turn out often to share important topological properties in common to some degree. There will be interesting scientific arbitrage opportunities in further work at the graph theoretically-mediated interface between systems neuroscience and the statistical physics of financial markets.
Topological isomorphisms of human brain and financial market networks.
Vértes, Petra E; Nicol, Ruth M; Chapman, Sandra C; Watkins, Nicholas W; Robertson, Duncan A; Bullmore, Edward T
2011-01-01
Although metaphorical and conceptual connections between the human brain and the financial markets have often been drawn, rigorous physical or mathematical underpinnings of this analogy remain largely unexplored. Here, we apply a statistical and graph theoretic approach to the study of two datasets - the time series of 90 stocks from the New York stock exchange over a 3-year period, and the fMRI-derived time series acquired from 90 brain regions over the course of a 10-min-long functional MRI scan of resting brain function in healthy volunteers. Despite the many obvious substantive differences between these two datasets, graphical analysis demonstrated striking commonalities in terms of global network topological properties. Both the human brain and the market networks were non-random, small-world, modular, hierarchical systems with fat-tailed degree distributions indicating the presence of highly connected hubs. These properties could not be trivially explained by the univariate time series statistics of stock price returns. This degree of topological isomorphism suggests that brains and markets can be regarded broadly as members of the same family of networks. The two systems, however, were not topologically identical. The financial market was more efficient and more modular - more highly optimized for information processing - than the brain networks; but also less robust to systemic disintegration as a result of hub deletion. We conclude that the conceptual connections between brains and markets are not merely metaphorical; rather these two information processing systems can be rigorously compared in the same mathematical language and turn out often to share important topological properties in common to some degree. There will be interesting scientific arbitrage opportunities in further work at the graph-theoretically mediated interface between systems neuroscience and the statistical physics of financial markets.
杨锐
2014-01-01
文章旨在通过系统调研分析国际大型学术出版商Springer的网络数字出版物平台SpringerLink的检索浏览、发布获取、个性化服务等功能和其他特色,为我国建设期刊网站、刊群平台,实现期刊出版数字化、规模化提供参考和借鉴.
Retzel, A.; Hansen, A.D.; Grønkjær, P.
2007-01-01
The structural complexity of coral reefs is important for their function as shelter and feeding habitats for coral reef fishes, but physical disturbance by human activities often reduce complexity of the reefs by selectively destroying fragile and more complex coral species. The damselfish Springer......'s demoiselle Chrysiptera springeri primarily utilize complex coral heads for shelter and are hence vulnerable to human disturbance. In order to evaluate the potential effect of habitat degradation on juvenile fish growth, coral reef cover, fish age at settling and otolith growth, juvenile Springer's demoiselle...... was investigated on a protected and non-protected coral reef in Darvel Bay, Borneo. The protected reef had higher coverage of complex branching corals and exhibited a more complex 3-dimensional structure than the non-protected reef. Springer's demoiselle settled at the same age on non-protected and protected reefs...
Karyatin, Arianiansyah
2016-01-01
Penelitian ini dilakukan pada situs database jurnal elektronik Emerald, ProQuest ABI/INFORM dan SpringerLink. Tujuan penelitian ini adalah untuk mengetahui bagaimana konten (muatan) subjek kajian manajemen dan ekonomi pada database Emerald, ProQuest ABI/INFORM dan SpringerLink dan untuk mengetahui di dalam database manakah diantara database Emerald, ProQuest ABI/INFORM, dan Springerlink yang memuat bidang kajian manajemen dan ekonomi yang paling lengkap. Metode yang digunakan dalam pene...
Karyatin, Arianiansyah
2016-01-01
Penelitian ini dilakukan pada situs database jurnal elektronik Emerald, ProQuest ABI/INFORM dan SpringerLink. Tujuan penelitian ini adalah untuk mengetahui bagaimana konten (muatan) subjek kajian manajemen dan ekonomi pada database Emerald, ProQuest ABI/INFORM dan SpringerLink dan untuk mengetahui di dalam database manakah diantara database Emerald, ProQuest ABI/INFORM, dan Springerlink yang memuat bidang kajian manajemen dan ekonomi yang paling lengkap. Metode yang digunakan dalam pene...
刘二稳; 王晓菊; 陈光美
2009-01-01
@@ "Springer Link"数据库资源现拥有2105余种在线全文电子期刊、32517余种电子图书、1034种电子丛书和147种在线参考工具书.目前,Springer Link所提供的全文电子期刊按学科分为13个在线图书馆:(1)建筑和设计(Architecture and Design);(2)行为科学(Behavioral Science);(3)生物医学和生命科学(Biomedical and Life Sciences);(4)商业和经济(Business and Economics);(5)化学和材料科学(Chemistry and Materials Science),(6)计算机科学(Computer Science);(7)地球和环境科学(Earth and Environmental Science);(8)工程学(Engineering);(9)人文、社科和法律(Humanities,Social Sciences and Law);(10)数学和统计学(Mathematics and Statistics);(11)医学(Medicine);(12)物理和天文学(Physics and Astronomy);(13)计算机职业技术与专业计算机应用(Professional and Applied Computing).
Bezrukavnikov, Roman
2010-01-01
We prove most of Lusztig's conjectures from the paper "Bases in equivariant K-theory II", including the existence of a canonical basis in the Grothendieck group of a Springer fiber. The conjectures also predict that this basis controls numerics of representations of the Lie algebra of a semi-simple algebraic group over an algebraically closed field of positive characteristic. We check this for almost all characteristics. To this end we construct a non-commutative resolution of the nilpotent cone which is derived equivalent to the Springer resolution. On the one hand, this noncommutative resolution is shown to be compatible with the positive characteristic of the Beilinson-Bernstein localization equivalences. On the other hand, it is compatible with the t-structure arising from the equivalence of Arkhipov-Bezrukavnikov with the derived category of perverse sheaves on the affine flag variety of the Langlands dual group which was inspired by local geometric Langlands duality. This allows one to apply Frobenius p...
Felix Barahona Márquez
2016-07-01
Full Text Available Emerging market multinational enterprises (EMNEs are rapidly increasing their foreign direct investment around the world and, in particular, in the countries of Southern Europe. Although, international business scholars have been quick to put the spotlight on this new phenomenon, the cultural adaptation of EMNE subsidiaries to host-country environments, especially those of Europe, has remained largely unexamined. This question acquires particular relevance owing to the considerable cultural distance between emerging and developed economies and the isomorphic conflicts that can arise at the subsidiary level. Here, we examine this situation by reporting two case studies of Chinese subsidiaries operating in Spain. Our findings suggest that guanxi – the deep-rooted system of personal relations and social connections founded on mutual interests – plays a major role in the search for legitimacy undertaken by Chinese subsidiaries located in Southern Europe. The adoption and adaptation of Chinese cultural values and practices to the local environment allow the subsidiary to align itself with the culture of the parent organization at the same time as it embeds itself in the host environment, thus resolving any isomorphic conflicts.
On the Impossibility of a Quantum Sieve Algorithm for Graph Isomorphism
Moore, Cristopher; Moore, Cristopher; Russell, Alexander
2006-01-01
It is known that any quantum algorithm for Graph Isomorphism that works within the framework of the hidden subgroup problem (HSP) must perform highly entangled measurements across Omega(n log n) coset states. One of the only known models for how such a measurement could be carried out efficiently is Kuperberg's algorithm for the HSP in the dihedral group, in which quantum states are adaptively combined and measured according to the decomposition of tensor products into irreducible representations. This ``quantum sieve'' starts with coset states, and works its way down towards representations whose probabilities differ depending on, for example, whether the hidden subgroup is trivial or nontrivial. In this paper we give strong evidence that no such approach can succeed for Graph Isomorphism. Specifically, we consider the natural reduction of Graph Isomorphism to the HSP over the the wreath product S_n \\wr Z_2. We show, modulo a group-theoretic conjecture regarding the asymptotic characters of the symmetric gro...
Isomorphism and Generation of Montgomery-Form Elliptic Curves Suitable for Cryptosystems
LIU Duo; SONG Tao; DAI Yiqi
2005-01-01
Many efficient algorithms of Montgomery-form elliptic curve cryptology have been investigated recently. At present, there are no reported studies of the isomorphic class of the Montgomery-form elliptic curve over a finite field. This paper investigates the isomorphism of Montgomery-form elliptic curves via the isomorphism of Weierstrass-form elliptic curves and gives a table of (nearly) all the forms of Montgomery-form elliptic curves suitable for cryptographic usage. Then, an algorithm for generating a secure elliptic curve with Montgomery-form is presented. The most important advantages of the new algorithm are that it avoids the transformation from an elliptic curve's Weierstrass-form to its Montgomery-form, and that it decreases the probability of collision. So, the proposed algorithem is quicker, simpler, and more efficient than the old ones.
The comparison of tree-sibling time consistent phylogenetic networks is graph isomorphism-complete.
Cardona, Gabriel; Llabrés, Mercè; Rosselló, Francesc; Valiente, Gabriel
2014-01-01
Several polynomial time computable metrics on the class of semibinary tree-sibling time consistent phylogenetic networks are available in the literature; in particular, the problem of deciding if two networks of this kind are isomorphic is in P. In this paper, we show that if we remove the semibinarity condition, then the problem becomes much harder. More precisely, we prove that the isomorphism problem for generic tree-sibling time consistent phylogenetic networks is polynomially equivalent to the graph isomorphism problem. Since the latter is believed not to belong to P, the chances are that it is impossible to define a metric on the class of all tree-sibling time consistent phylogenetic networks that can be computed in polynomial time.
Moore, Cristopher; Moore, Cristopher; Russell, Alexander
2005-01-01
Recently, Moore, Russell and Schulman showed that quantum measurements of single coset states in the symmetric group yield exponentially little information about the Hidden Subgroup Problem in the case relevant to Graph Isomorphism. Extending their techniques to multiregister Fourier sampling, Moore and Russell showed that entangled measurements over pairs of registers yield superpolynomially little information, and conjectured that entangled measurements over $\\Theta(n \\log n)$ registers are necessary. Here we prove this conjecture. This significantly restricts the types of possible quantum algorithms for Graph Isomorphism.
Isomorphism classes of hyperelliptic curves of genus 2 over finite fields with characteristic 2
无
2006-01-01
In this paper we study the computation of the number of isomorphism classes of hyperelliptic curves of genus 2 over finite fields Fq with q even. We show the formula of the number of isomorphism classes, that is, for q = 2m, if 4 (|) m, then the formula is 2q3 + q2 - q;if 4 | m, then the formula is 2q3 + q2 - q + 8. These results can be used in the classification problems and the hyperelliptic curve cryptosystems.
Chandralekha; Singh
2008-01-01
In this paper, we explore the use of isomorphic problem pairs (IPPs) to assess introductory physics students' ability to solve and successfully transfer problem-solving knowledge from one context to another in mechanics. We call the paired problems "isomorphic" because they require the same physics principle to solve them. We analyze written…
Croucher, Gwilym; Woelert, Peter
2016-01-01
Previous research has highlighted the occurrence of isomorphic tendencies--convergences in terms of formal organizational structure--in higher education systems in times of uncertainty and under external pressure to change. It has been repeatedly claimed that the Australian university system largely followed a logic of isomorphic change in the…
马普学会通过SpringerLink和Open Choice获取Springer出版的文章
苍宏宇
2008-01-01
马普学会日前与Springer达成协议，允许马普学会78个研究机构的研究人员免费获取SpringerLink中的全部内容、以及Springer Open Choice中马普学会研究人员发表的全部内容。目的是使所有研究人员能够获取马普机构发表在Springer期刊上的文章。
Technical isomorphism at work : ERP-embedded similarity-enhancing mechanisms
Batenburg, Ronald; Benders, Jos; van der Blonk, Heico
2008-01-01
Purpose - The purpose of this paper is to discuss the mechanisms inducing a user organization to conform with enterprise resource planning (ERP)-embedded organizational logics and accompanying implementation procedures. Design/methodology/approach - Based around the notion of technical isomorphism,
Huskinson, Sally L; Woolverton, William L; Green, Leonard; Myerson, Joel; Freeman, Kevin B
2015-06-01
Research on delay discounting has focused largely on nondrug reinforcers in an isomorphic context in which choice is between alternatives that involve the same type of reinforcer. Less often, delay discounting has been studied with drug reinforcers in a more ecologically valid allomorphic context where choice is between alternatives involving different types of reinforcers. The present experiment is the first to examine discounting of drug and nondrug reinforcers in both isomorphic and allomorphic situations using a theoretical model (i.e., the hyperbolic discounting function) that allows for comparisons of discounting rates between reinforcer types and amounts. The goal of the current experiment was to examine discounting of a delayed, nondrug reinforcer (food) by male rhesus monkeys when the immediate alternative was either food (isomorphic situation) or cocaine (allomorphic situation). In addition, we sought to determine whether there was a magnitude effect with delayed food in the allomorphic situation. Choice of immediate food and immediate cocaine increased with amount and dose, respectively. Choice functions for immediate food and cocaine generally shifted leftward as delay increased. Compared to isomorphic situations in which food was the immediate alternative, delayed food was discounted more steeply in allomorphic situations where cocaine was the immediate alternative. Notably, discounting was not affected by the magnitude of the delayed reinforcer. These data indicate that how steeply a delayed nondrug reinforcer is discounted may depend more on the qualitative characteristics of the immediate reinforcer and less on the magnitude of the delayed one. (c) 2015 APA, all rights reserved).
The spatial isomorphism problem for close separable nuclear C*-algebras
Christensen, Erik; Sinclair, Allan M.; Smith, Roger R.
2010-01-01
In 1972 R. V. Kadison and D. Kastler introduced a metric on the set of all C*-subalgebras of the algebra of bounded operators on a Hilbert space. They conjectured that sufficiently close C*-algebras must be isomorphic. In the article this hypotheses is verified for nuclear C*-algebras....
Inclusion Tuning of Nonlinear Optical Materials: KTP (Potassium Titanyl Phosphate) Isomorphs
1988-06-01
o OFCE OF NAVAL RESEARCH Contract N00014-87-K-0457 V R&T Code 4134015-01 0) Technical. Report No. 23 "Inclusion Tuning of Nonlinear Optical Materials : KIP...bry block nuum.ber) see attached #11 Inclusion Tuning of Nonlinear Optical Materials : KTP Isomorphs * Q1 UISTRISUTION/AVAII..ASILITY 00 ABSTRACT 21
On Some Isomorphisms between Bounded Linear Maps and Non-Commutative Lp-Spaces
E. J. Atto
2014-04-01
Full Text Available We define a particular space of bounded linear maps using a Von Neumann algebra and some operator spaces. By this, we prove some isomorphisms, and using interpolation in some particular cases, we get analogue of non-commutative Lp spaces.
A Case of Mimetic Isomorphism: A Short-Cut to Increasing Loyalty to Academia
Orkodashvili, Mariam
2008-01-01
The paper discusses the process of shortening career path to leadership positions in academia that could serve as an example of mimetic isomorphism, where university tries to apply business-like quick result-oriented strategies. This strategy incentivizes young faculty to stay in universities and keep loyalty to academia. This process could also…
Sticking to standards : Technical and other isomorphic pressures in deploying ERP-systerns
Benders, J.; Batenburg, R.; van der Blonk, H.C.
2006-01-01
This paper focuses on how and to what extent homogenization coincides with the deployment of ERP-systems. Using the work of DiMaggio and Powell on isomorphic pressures, we argue that the use of ERP-systems may in several ways lead to standardization within and between organizations. Competitive and
Using Canonical Forms for Isomorphism Reduction in Graph-based Model Checking
Kant, Gijs
2010-01-01
Graph isomorphism checking can be used in graph-based model checking to achieve symmetry reduction. Instead of one-to-one comparing the graph representations of states, canonical forms of state graphs can be computed. These canonical forms can be used to store and compare states. However, computing
Parallel Process and Isomorphism: A Model for Decision Making in the Supervisory Triad
Koltz, Rebecca L.; Odegard, Melissa A.; Feit, Stephen S.; Provost, Kent; Smith, Travis
2012-01-01
Parallel process and isomorphism are two supervisory concepts that are often discussed independently but rarely discussed in connection with each other. These two concepts, philosophically, have different historical roots, as well as different implications for interventions with regard to the supervisory triad. The authors examine the difference…
Sticking to standards : Technical and other isomorphic pressures in deploying ERP-systerns
Benders, J.; Batenburg, R.; van der Blonk, H.C.
This paper focuses on how and to what extent homogenization coincides with the deployment of ERP-systems. Using the work of DiMaggio and Powell on isomorphic pressures, we argue that the use of ERP-systems may in several ways lead to standardization within and between organizations. Competitive and
Antonia Chiara Scardicchio
2014-10-01
Full Text Available Moving from the evidence of neuroscience about the importance of "joyful" dimension in the learning process, both in childhood than in adulthood, the essay discusses about isomorphism - neurobiologically founded - between knowledge and play. It moves from one stydy in particular, as a pre- text for neuropedagogical reflection around the "joy": joy in education process is described like an epistemological and didactic interweaving between form and content, knowledge and passion, dimensions of meaning and relationship. The landing is related to the acceptance of the systemic dimension in the design and evaluation of adult education: the appearance of "joyful", therefore, does not coincide with lightness and dilution of knowledge but with the understanding of its complexity. The invitation, both epistemological as pragmatic, is the recognition of the indispensability of "neurodidatics skills" (Rivoltella, 2012 for anyone involved in education and relationships.
Mugheirbi, Naila A; Tajber, Lidia
2015-09-01
The external appearance of a crystal of active pharmaceutical ingredient (API), usually referred to as a crystal habit, has a substantial impact on the API's physicochemical and physiochemical properties and, subsequently, its pharmaceutical performance. In this work, we investigate the role of different parameters of antisolvent crystallization impacting on the itraconazole (ITR) crystal habit and how this crystal habit manipulation, including crystal intergrowth, can affect crystal interactions with water molecules. Three distinct isomorphic crystal habits of ITR, a twinned blade-shaped (CHtw), a plate-shaped (CHpl), and a flat sheet-shaped with dendritic ends (CHsh), were obtained by controlling crystallization conditions. A liquid-liquid crystalline phase separation was observed as an intermediate stage preceding crystal growth. The March-Dollase parameter was used as a quantitative description of the preferred orientation, where CHsh exhibited the highest preferred orientation. The three crystal habits were evaluated for their wettability and water vapor distribution, at 37 °C, using the Young-Nelson fitting model. CHtw crystals sorbed a statistically significantly higher amount of water than CHpl and CHsh, which was attributed to the presence of crystal defects due to the twinning boundary. On the other hand, the amount of water adsorbed on the surface of CHpl and CHsh crystals was comparable and it was about twice that adsorbed on CHtw crystals. This was related to the abundance of hydrophilic chemical functionalities on the (010) facet of CHpl and CHsh as supported by the full interaction map carried out using Mercury software. This study expands investigations of the impact of crystal habit manipulation on API's functional properties beyond the well-known solubility improvement approaches.
全文数据库Springer Link与CA on CD和PubMed的比较
耿波; 冯研
2005-01-01
目的:一方面希望通过数据库的比较为合理使用数据库做参考,另一方面,也希望评价一下Springer Link数据库在医学院校引进的必要性;方法:通过医药学方面两个权威数据库CA和PUBMED对Springer Link数据库收录医学期刊的比例和语种、地区分布等进行考查,并核实该数据库中的期刊被CA和PUBMED收录的情况,同时对比这些数据库检索界面的不同;结果:Springer Link数据库收录的医学期刊有237种之多,地区分布以德国为主,但语种以英文为主;被CA或PUBMED收录的期刊有242种;结论:Springer Link数据库是医药学院应该引进的一个比较重要的数据库,但要根据实际情况与CA和PUBMED等数据库结合起来应用.
Colliver, Jerry A.; Feltovich, Paul J.; Verhulst, Steven J.
2003-01-01
Reviews the studies on which a meta-analysis by Springer, Stanne, and Donovan (1999) were based; the meta-analysis had concluded that small group learning in science, mathematics, engineering, and technology education is effective. Concludes that the meta-analysis' call for more widespread implementation of small group learning is not supported.…
Colliver, Jerry A.; Feltovich, Paul J.; Verhulst, Steven J.
2003-01-01
Reviews the studies on which a meta-analysis by Springer, Stanne, and Donovan (1999) were based; the meta-analysis had concluded that small group learning in science, mathematics, engineering, and technology education is effective. Concludes that the meta-analysis' call for more widespread implementation of small group learning is not supported.…
Strong Coupling Limits and Quantum Isomorphisms of the Gauged Thirring Model
Bufalo, R.; Casana, R.; Pimentel, B. M.
We have studied the quantum equivalence in the respective strong coupling limits of the bidimensional gauged Thirring model with both Schwinger and Thirring models. It is achieved following a nonperturbative quantization of the gauged Thirring model into the path-integral approach. First, we have established the constraint structure via the Dirac's formalism for constrained systems and defined the correct vacuum-vacuum transition amplitude by using the Faddeev-Senjanovic method. Next, we have computed exactly the relevant Green's functions and shown the Ward-Takahashi identities. Afterwards, we have established the quantum isomorphisms between gauged Thirring model and both Schwinger and Thirring models by analyzing the respective Green's functions in the strong coupling limits, respectively. A special attention is necessary to establish the quantum isomorphism between the gauged Thirring model and the Thirring model.
Applications of BGP-reflection functors:isomorphisms of cluster algebras
ZHU; Bin
2006-01-01
Given a symmetrizable generalized Cartan matrix A,for any index k,one can define the matrix A (see sec.4 for the precise meaning).When A is of finite type,these isomorphisms behave nicely; they are compatible with the BGP-reflection functors of cluster categories defined in a previous work if we identify the indecomposable objects in the categories with cluster variables of the corresponding cluster algebras,and they are also compatible with the "truncated simple reflections" defined by Fomin-Zelevinsky.Using the construction of preprojective or preinjective modules of hereditary algebras by Dlab-Ringel and the Coxeter automorphisms (i.e.a product of these isomorphisms),we construct infinitely many cluster variables for cluster algebras of infinite type and all cluster variables for finite types.
Heloísa Helena Marques da Silva
2013-12-01
Full Text Available The National Environmental Education Policy determines the inclusion of environmental education at all levels of education as a continuous cross-cutting model, prohibiting its use as a specific discipline. The theoretical perspective is based on isomorphism applied to the transverse mode in Higher Education Institutions – HEI, seeking to identify the mechanisms that drive the change of their behavior, uncovering what forces promote the incorporation of environmental education in the disciplines as a crosscutting theme. The methodology used is quantitative-qualitative and uses a case study at four HEIs with Degree in Administration. We conclude that coercive isomorphic pressure, by society, and rules, linked to professional practice, contribute mostly to the institutionalization of environmental education in the curriculum. Social demands for training the administrator with environmental knowledge is the strongest factor in this process.
Isomorph theory prediction for the dielectric loss variation along an isochrone
Xiao, Wence; Tofteskov, Jon; Dyre, J. C.
2015-01-01
This paper derives a prediction for the variation of the amplitude of the dielectric loss from isomorph theory, and presents an experimental test of the prediction performed by measuring the dielectric relaxation behavior of the van der Waals liquid 5-phenyl-4-ether (5PPE). The liquid is studied...... is reproducible ± 0.1 %. We moreover find that the empty capacitance of the capacitor cell is stable within ± 0.3 % in our measuring range and can be assumed to be constant. Using this we predict for two isomorph states there is C2″(f) = C1″(f)(ρ1/ρ2)γ−1 to scale the imaginary capacitance, where C1...
Density Functional Investigations into the Adsorption of Methanol on Isomorphously Substituted ZSM-5
Shuping Yuan; Jianguo Wang; Yongwang Li; Haijun Jiao
2003-01-01
The adsorption of methanol in the acid sites of zeolites has attracted a great deal of attention because of its relevance to the industrial methanol to gasoline conversion process. In this work, the B3LYP hybrid density functional method was used to investigate the adsorption behavior of methanol on Bronsted acid sites in B, Al, Ga and Fe isomorphously substituted ZSM-5 zeolites. The optimized structures reveal a physisorbed methanol interacting with the zeolite framework through two hydrogen bonds. The order of the computed adsorption energy correlates with the acid strength of the isomorphously substituted ZSM-5:B-ZSM-5《Fe-ZSM-5＜Ga-ZSM-5＜Al-ZSM-5. The adsorption difference between methanol and ammonia is compared.
Heidel, R. Eric
2016-01-01
Statistical power is the ability to detect a significant effect, given that the effect actually exists in a population. Like most statistical concepts, statistical power tends to induce cognitive dissonance in hepatology researchers. However, planning for statistical power by an a priori sample size calculation is of paramount importance when designing a research study. There are five specific empirical components that make up an a priori sample size calculation: the scale of measurement of the outcome, the research design, the magnitude of the effect size, the variance of the effect size, and the sample size. A framework grounded in the phenomenon of isomorphism, or interdependencies amongst different constructs with similar forms, will be presented to understand the isomorphic effects of decisions made on each of the five aforementioned components of statistical power. PMID:27073717
R. Eric Heidel
2016-01-01
Full Text Available Statistical power is the ability to detect a significant effect, given that the effect actually exists in a population. Like most statistical concepts, statistical power tends to induce cognitive dissonance in hepatology researchers. However, planning for statistical power by an a priori sample size calculation is of paramount importance when designing a research study. There are five specific empirical components that make up an a priori sample size calculation: the scale of measurement of the outcome, the research design, the magnitude of the effect size, the variance of the effect size, and the sample size. A framework grounded in the phenomenon of isomorphism, or interdependencies amongst different constructs with similar forms, will be presented to understand the isomorphic effects of decisions made on each of the five aforementioned components of statistical power.
The Features of Springer link and Its Retrieval Functions%谈德国施普林格数据库(Springer link)的特点及检索功能
谈鹤玲
2003-01-01
作者通过对德国施普林格数据库(Springer link)的长期实际运用,就其概况、分类科学性、收录权威性、标识明确性、运用简单性等特点及检索功能进行了分析介绍,以供读者借鉴.
刘靖莉
2007-01-01
对EBSCOhost、Springer Link、Kluwer、John Wiley和Elsevier SDOS数据库检索系统的收录范围、检索功能及信息服务功能等进行比较研究,分析其异同点,以期为高校图书馆引进外文电子数据库提供有价值的参考.
Kisku, Dakshina Ranjan; Sing, Jamuna Kanta
2010-01-01
This paper presents a feature level fusion approach which uses the improved K-medoids clustering algorithm and isomorphic graph for face and palmprint biometrics. Partitioning around medoids (PAM) algorithm is used to partition the set of n invariant feature points of the face and palmprint images into k clusters. By partitioning the face and palmprint images with scale invariant features SIFT points, a number of clusters is formed on both the images. Then on each cluster, an isomorphic graph is drawn. In the next step, the most probable pair of graphs is searched using iterative relaxation algorithm from all possible isomorphic graphs for a pair of corresponding face and palmprint images. Finally, graphs are fused by pairing the isomorphic graphs into augmented groups in terms of addition of invariant SIFT points and in terms of combining pair of keypoint descriptors by concatenation rule. Experimental results obtained from the extensive evaluation show that the proposed feature level fusion with the improve...
Isomorphism Between Estes’ Stimulus Fluctuation Model and a Physical- Chemical System
Makoto Yamaguchi
2013-10-01
Full Text Available Although Estes’ Stimulus Sampling Theory has almost completely lost its influence, its theoretical framework has not been disproved. Particularly, one theory in that framework, Stimulus Fluctuation Model, is still important because it explains spontaneous recovery. In this short note, the process of the theory is shown to be isomorphic to the diffusion of solution between compartments. Envisioning the theory as diffusion will make it appear less artificial and suggest natural extensions.
Decoherence enhances performance of quantum walks applied to graph isomorphism testing
Bruderer, M.; Plenio, M. B.
2016-01-01
Computational advantages gained by quantum algorithms rely largely on the coherence of quantum devices and are generally compromised by decoherence. As an exception, we present a quantum algorithm for graph isomorphism testing whose performance is optimal when operating in the partially coherent regime, as opposed to the extremes of fully coherent or classical regimes. The algorithm builds on continuous-time quantum stochastic walks (QSWs) on graphs and the algorithmic performance is quantifi...
Technology in the Marketing Activities of Schools as an Example to Institutional Isomorphism
B. Çağla Garipağaoğlu; Sinem Vatanartıran; Şirin Karadeniz
2013-01-01
The purpose of this study is to understand and explore the isomorphic changes in the private school chain sector in Turkey over the last five years regarding the effects of recent technology adoptions for school marketing activities. Qualitative research model was used and the two largest school chains were selected with concept sampling strategy. To collect data, we interviewed the chief marketing officers of the two selected school chains by using a semi-structured interview guideline. The ...
On the isomorphism between the medial axis and a dual of the Delaunay graph
Sharma, Ojaswa; Anton, François; Mioc, Darka
2009-01-01
In this paper, we show a graph isomorphism between a dual graph of the Delaunay graph of the sampled points and the medial axis of the sampled features. This dual graph captures the fact that two Delaunay triangles share two vertices or an edge. Then, we apply it to the computation of the medial ...... of (satellite) imagery and scanned maps. Applications include coastline extraction, extraction of fields, clear cuts, clouds, as well as heating or pollution monitoring and dense forest mapping among others....
Isomorphic Operators and Functional Equations for the Skew-Circulant Algebra
Zhaolin Jiang
2014-01-01
Full Text Available The skew-circulant matrix has been used in solving ordinary differential equations. We prove that the set of skew-circulants with complex entries has an idempotent basis. On that basis, a skew-cyclic group of automorphisms and functional equations on the skew-circulant algebra is introduced. And different operators on linear vector space that are isomorphic to the algebra of n×n complex skew-circulant matrices are displayed in this paper.
On the Schwartz Space Isomorphism Theorem for Rank One Symmetric Space
Joydip Jana; Rudra P Sarkar
2007-08-01
In this paper we give a simpler proof of the $L^p$-Schwartz space isomorphism (0 < ≤ 2) under the Fourier transform for the class of functions of left -type on a Riemannian symmetric space of rank one. Our treatment rests on Anker’s [2] proof of the corresponding result in the case of left -invariant functions on . Thus we give a proof which relies only on the Paley–Wiener theorem.
三角Banach代数的等距同构%ISOMETRIC ISOMORPHISMS OF TRIANGULAR BANACH ALGEBRAS
骆建文; 陆芳言
2000-01-01
Let (X) and (X) be Banach algebras.Let (X) be a Banach (X),(X)-module with bounded 1.Then (X) is a Banach algebra with the usual operations and the norm ‖［AOMB］‖=‖A‖+‖M‖+‖B‖.Such an algebra is called a triangular Banach algebra.In this paper the isometric isomorphisms of triangular Banach algebras are characterized.
Determine the Isomorphism of Graphs Based on CAD%基于CAD判断图同构
郭美美
2014-01-01
图论在自然科学与社会科学的研究中应用非常广泛和重要，同构作为其基本问题，也是一直在研究的重点。根据图论中图的性质与特点，应用CAD作图软件为例，通过移动顶点和旋转图形等基本操作，可以对图是否同构进行判定，这完全符合图同构的定义。%Graph Theory is important and widely applied to the natural sciences and social sciences research. As the focus in research on graph theory, isomorphism of graph is one of its basic problem. According to the nature and characteristics of graph in the graph theory, takes CAD drawing application software as an example to determine the isomorphism of graphs, which by moving the vertices and rotating graphics and other basic operations. It complies with the graph isomorphism.
On the impossibility of a quantum sieve algorithm for graph isomorphism
Moore, Cristopher; Sniady, P; Moore, Cristopher; Russell, Alexander; Sniady, Piotr
2006-01-01
It is known that any quantum algorithm for Graph Isomorphism that works within the framework of the hidden subgroup problem (HSP) must perform highly entangled measurements across Omega(n log n) coset states. One of the only known models for how such a measurement could be carried out efficiently is Kuperberg's algorithm for the HSP in the dihedral group, in which quantum states are adaptively combined and measured according to the decomposition of tensor products into irreducible representations. This ``quantum sieve'' starts with coset states, and works its way down towards representations whose probabilities differ depending on, for example, whether the hidden subgroup is trivial or nontrivial. In this paper we show that no such approach can produce a polynomial-time quantum algorithm for Graph Isomorphism. Specifically, we consider the natural reduction of Graph Isomorphism to the HSP over the the wreath product S_n \\wr Z_2. Using a recently proved bound on the irreducible characters of S_n, we show that ...
Isomorphous substitution of transition-metal ions in the nanoporous nickel phosphate VSB-5.
Jhung, Sung Hwa; Chang, Jong-San; Hwang, Young Kyu; Grenèche, Jean-Marc; Férey, Gérard; Cheetham, Anthony K
2005-01-20
The transition-metal-incorporated nickel phosphate molecular sieves (TMI-VSB-5) have been hydrothermally synthesized at 453 K in weak basic conditions under microwave irradiation. By means of X-ray diffraction, inductively coupled plasma (ICP), ultraviolet-visible (UV-vis) diffuse reflectance, and Mössbauer spectroscopies, successful isomorphous (at least partial) substitution of transition-metal ions in the VSB-5 framework has been verified. Characterization results show that the framework structure of nanoporous VSB-5 can accommodate a substantial level of isomorphous substitution of transition-metal ions up to about 10, 5, and 3 atom % for Fe, Mn, and V, respectively, in both octahedral nickel sites (Mn and Fe) and tetrahedral phosphorus sites (V). The isomorphous substitution including the replacement mechanism was studied by not only the change of unit cell parameters but also spectroscopic analysis. The unit cell parameters of TMI-VSB-5 including a unit cell volume and a-axis length relied on the ionic radii difference between the incorporated ion and the original framework ions such as Ni or P (RTMI - RNi or RTMI - RP).
An Efficient Parallel Algorithm for Graph Isomorphism on GPU using CUDA
Min-Young Son
2015-10-01
Full Text Available Modern Graphics Processing Units (GPUs have high computation power and low cost. Recently, many applications in various fields have been computed powerfully on the GPU using CUDA. In this paper, we propose an efficient parallel algorithm for graph isomorphism which runs on the GPU using CUDA for matching large graphs. Parallelization of a sequential graph isomorphism algorithm is one of the hardest problems because it includes inherently sequential characteristics. Our approach divides the given graphs into smaller blocks using a divide-and-conquer, and then maps the blocks to parallel processing units on the GPU. The smaller blocks are solved in individual processing units, and then the results are combined using hierarchical procedures. In the experiment, we used random graphs from vertices of small size to up to tens of thousands of vertices in order to solve efficiently graph isomorphism for large graphs. The experimental results show that the proposed approach brings a considerable improvement in performance and efficiency comparing to the CPU-based results. Our result also shows high performance, especially on large graphs.
Maria Chiara Pievatolo
2012-02-01
Full Text Available Ricopio, per chi non segue il nostro servizio Twitter, la notizia uscita ieri su Ciber Newsletter, su PLEIADI e altrove. I mostruosi margini di profitto delle multinazionali dell’editoria scientifica sono riportati qui. Aggiornamento 2/2/2012: la risposta di Springer è visibile qui; quella di Elsevier qui. Qui c’è un’analisi dei loro argomenti. Aggiornamento 3/2/2012: l’Economist si [...
The Weisfeiler-Lehman Method and Graph Isomorphism Testing
Douglas, B L
2011-01-01
Properties of the `$k$-equivalent' graph families constructed in Cai, F\\"{u}rer and Immerman, and Evdokimov and Ponomarenko are analysed relative the the recursive $k$-dim WL method. An extension to the recursive $k$-dim WL method is presented that is shown to efficiently characterise all such types of `counterexample' graphs, under certain assumptions. These assumptions are shown to hold in all known cases.
Валентность и изоморфизм(Valency and isomorphism
Lennart Lönngren
2008-01-01
Full Text Available Valency relations in a paraphrase should match those of the source expres- sion. This kind of isomorphism is investigated in the present article.In the passive sentence The plant was visited by Putin the relation between Putin and plant is the same as in the corresponding active sentence. It is not equally easy to see how isomorphism can be preserved in, for example, Who is the author of these lines?, derived from Who wrote these lines? This is achieved by introducing a new concept of basic semantic unit. Obviously, the predicate write, which is explicit in the source expression, must somehow be introduced in the semantic representation of the para- phrase. There are two ways of accounting for this "missing" predicate. It can either be extracted (computed from the words author and lines and assume the form of an implicit predicate, or the corresponding meaning can be car- ried by an agreement morpheme attached to the noun author (in the Russian paraphrase this noun is marked with the so-called agreement case. The first actant of write needs to be represented only once - through the word who - and therefore the noun author is assigned syntactic status, which means that it does not occupy a node of its own in the semantic graph.A number of further examples - not only sentences, but also phrases and words - are analysed in order to illustrate different cases of isomor- phism.
Marcelo Pedro Vieira
2013-03-01
Full Text Available This study aims to investigate the existence of institutional isomorphism in administration courses of two universities of the ACAFE system, as well as clarify the isomorphisms found. For that purpose it was taken as research question how the process of institutionalization of management courses generated isomorphisms? Thus, it was assumed that at one moment the courses institutionalized themselves and similar characteristic were presented. Data was collected through semiestructered interviews realized with the courses coordinators searching for evidences showing the existence of isomorphisms. The interviews were conducted and recorded in loco observing a semi-structured model based on the guidelines used by Morandi, Mascia and Cicchetti (2009. Thus, we seek to perceive organizational isomorphism with questions to trace sign of categories verifying behaviors, attitudes and norms related to the assumptions of Dimaggio and Powell (1983. The courses of administration are shaped by a minimum knowledge curriculum required by organs such as the category’s council and the state regulatory agency of higher education. It was also found the existence of similarities arising from organizational techniques, thus evidencing coercive, mimetic and normative isomorphisms.Este estudo tem como objetivo averiguar a existência do isomorfismo institucional nos cursos de administração de duas universidades do sistema ACAFE, bem como explicitar os tipos de isomorfismos encontrados. Para isso, partiu-se da pergunta de pesquisa como o processo de institucionalização dos cursos de administração gerou isomorfismos? Desta forma, partiu-se do pressuposto que em algum momento os cursos se institucionalizaram de forma a apresentar características similares. Os dados foram coletados por meio de entrevistas semiestruturadas realizadas com os coordenadores dos cursos e buscaram-se evidências que mostrassem a existência de isomorfismos. As entrevistas direcionadas
苏敏
2007-01-01
文章对电子图书的特点以及SpringerLink、金图图书、Netlibrary外文电子图书数据库的相同点、内容、浏览功能、检索功能以及使用功能等进行了较详尽的比较,为电子图书系统的引进以及学习提供了有益参考.
Hoover, Jerome D; Healy, Alice F
2017-02-14
The classic bat-and-ball problem is used widely to measure biased and correct reasoning in decision-making. University students overwhelmingly tend to provide the biased answer to this problem. To what extent might reasoners be led to modify their judgement, and, more specifically, is it possible to facilitate problem solution by prompting participants to consider the problem from an algebraic perspective? One hundred ninety-seven participants were recruited to investigate the effect of algebraic cueing as a debiasing strategy on variants of the bat-and-ball problem. Participants who were cued to consider the problem algebraically were significantly more likely to answer correctly relative to control participants. Most of this cueing effect was confined to a condition that required participants to solve isomorphic algebra equations corresponding to the structure of bat-and-ball question types. On a subsequent critical question with differing item and dollar amounts presented without a cue, participants were able to generalize the learned information to significantly reduce overall bias. Math anxiety was also found to be significantly related to bat-and-ball problem accuracy. These results suggest that, under specific conditions, algebraic reasoning is an effective debiasing strategy on bat-and-ball problem variants, and provide the first documented evidence for the influence of math anxiety on Cognitive Reflection Test performance.
Solving Problem of Graph Isomorphism by Membrane-Quantum Hybrid Model
Artiom Alhazov
2015-10-01
Full Text Available This work presents the application of new parallelization methods based on membrane-quantum hybrid computing to graph isomorphism problem solving. Applied membrane-quantum hybrid computational model was developed by authors. Massive parallelism of unconventional computing is used to implement classic brute force algorithm efficiently. This approach does not suppose any restrictions of considered graphs types. The estimated performance of the model is less then quadratic that makes a very good result for the problem of \\textbf{NP} complexity.
Moore, Cristopher; Moore, Cristopher; Russell, Alexander
2005-01-01
We establish a general method for proving bounds on the information that can be extracted via arbitrary entangled measurements on tensor products of hidden subgroup coset states. When applied to the symmetric group, the method yields an Omega(n log n) lower bound on the number of coset states over which we must perform an entangled measurement in order to obtain non-negligible information about a hidden involution. These results are tight to within a multiplicative constant and apply, in particular, to the case relevant for the Graph Isomorphism problem. Part of our proof was obtained after learning from Hallgren, Roetteler, and Sen that they had obtained similar results.
Isomorphs in the phase diagram of a model liquid without inverse power law repulsion
Veldhorst, Arnold Adriaan; Bøhling, Lasse; Dyre, J. C.;
2012-01-01
It is demonstrated by molecular dynamics simulations that liquids interacting via the Buckingham potential are strongly correlating, i.e., have regions of their phase diagram where constant-volume equilibrium fluctuations in the virial and potential energy are strongly correlated. A binary...... Buckingham liquid is cooled to a viscous phase and shown to have isomorphs, which are curves in the phase diagram along which structure and dynamics in appropriate units are invariant to a good approximation. To test this, the radial distribution function, and both the incoherent and coherent intermediate...
Ayça İnce
2017-01-01
Full Text Available Regardless of the diminishing budgets for investment in the cultural sphere, especially at the municipality level. Since 2000, 61 cultural centers have been opened in Istanbul alone. In spite of the growing cultural and artistic diversity and Turkish society's various demands in cultural services, of Turkish cultural policies on a local, city, and national level serves as a starting point for investigating how isomorphism transpires to the provision of cultural services on the level of Istanbul's district municipalities. This study not only explains the role of district municipalities in the cultural field of Istanbul, but also argues that three interconnected concepts—democratization, professionalization, and marketization—promote cultural convergence.
Þorlákur Axel Jónsson
2016-03-01
Full Text Available Book review of: Blossing, G. Imsen & L. Moos (eds, The Nordic Education Model: ´A School for All´ Encounters Noe-Liberal Policy (Dordrecht: Springer, Policy Implications of Research in Education 1, 2014
Carlo Penco
2013-03-01
Full Text Available A discussion of The Vienna Circle and the Nordic Countries. Networks and Transformations of Logical Empiricism, edited by Juha Manninen and Friedrich Stadtler, Vienna Circle Institute Yearbook vol.14, Springer, 2010.
Giuseppe Vitiello
2014-05-01
Full Text Available In electrodynamics there is a mutual exchange of energy and momentum between the matter field and the electromagnetic field and the total energy and momentum are conserved. For a constant magnetic field and harmonic scalar potential, electrodynamics is shown to be isomorph to a system of damped/amplified harmonic oscillators. These can be described by squeezed coherent states which in turn are isomorph to self-similar fractal structures. Under the said conditions of constant magnetic field and harmonic scalar potential, electrodynamics is thus isomorph to fractal self-similar structures and squeezed coherent states. At a quantum level, dissipation induces noncommutative geometry with the squeezing parameter playing a relevant role. Ubiquity of fractals in Nature and relevance of coherent states and electromagnetic interaction point to a unified, integrated vision of Nature.
News from the Library: Trial access to Springer Engineering e-books - test it and let us know!
CERN Library
2012-01-01
The ambition of a state-of-the-art research library is obviously to shape its collections to meet the needs of the different communities of readers that it serves. To this end, we try to expand our (e-)book collections to provide better coverage of subject areas where such a development is needed. The good news is that the CERN community now has the opportunity to access the whole collection of engineering e-books published by Springer between 2005 and 2012. The trial period ends on 30 November 2012 and will help us to monitor usage and better shape our collections accordingly. This valuable collection is available and searchable here. Please send questions and feedback to library.desk@cern.ch.
Barniol, Pablo; Zavala, Genaro
2014-01-01
In this article we compare students' understanding of vector concepts in problems with no physical context, and with three mechanics contexts: force, velocity, and work. Based on our "Test of Understanding of Vectors," a multiple-choice test presented elsewhere, we designed two isomorphic shorter versions of 12 items each: a test with no…
Ordered and isomorphic mapping of periodic structures in the parametrically forced logistic map
Maranhão, Dariel M.
2016-09-01
We investigate the periodic domains found in the parametrically forced logistic map, the classical logistic map when its control parameter changes dynamically. Phase diagrams in two-parameter spaces reveal intricate periodic structures composed of patterns of intersecting superstable orbits curves, defining the cell of a periodic window. Cells appear multifoliated and ordered, and they are isomorphically mapped when one changes the map parameters. Also, we identify the characteristics of simplest cell and apply them to other more complex, discussing how the topography on parameter space is affected. By use of the winding number as defined in periodically forced oscillators, we show that the hierarchical organization of the periodic domains is manifested in global and local scales.
Bufalo, Rodrigo; Pimentel, Bruto Max
2010-01-01
We have performed a nonperturbative quantization of the two-dimensional gauged Thirring model by using the path-integral approach. First, we have studied the constraint structure via the Dirac's formalism for constrained systems and by using the Faddeev-Senjanovic method we have calculated the vacuum--vacuum transition amplitude, then have computed the correlation functions in a nonperturbative framework, and the Ward-Takahashi identities of model as well. Afterwards, we have established at quantum level the isomorphisms between gauged Thirring model with the Schwinger and Thirring models by analyzing the respective Green's functions in the strong limit of the coupling constants $g $ and $e$, respectively. A special attention is necessary to perform the quantum analysis in the limit $e\\rightarrow \\infty $.
Declarative Combinatorics: Isomorphisms, Hylomorphisms and Hereditarily Finite Data Types in Haskell
Tarau, Paul
2008-01-01
This paper is an exploration in a functional programming framework of isomorphisms between elementary data types (natural numbers, sets, finite functions, permutations binary decision diagrams, graphs, hypergraphs, parenthesis languages, dyadic rationals etc.) and their extension to hereditarily finite universes through hylomorphisms derived from ranking/unranking and pairing/unpairing operations. An embedded higher order combinator language provides any-to-any encodings automatically. A few examples of "free algorithms" obtained by transferring operations between data types are shown. Other applications range from stream iterators on combinatorial objects to succinct data representations and generation of random instances. The paper is part of a larger effort to cover in a declarative programming paradigm some fundamental combinatorial generation algorithms along the lines of Knuth's recent work \\cite{knuth06draft}. In 440 lines of Haskell code we cover 20 data types and, through the use of the embedded comb...
Decoherence-enhanced performance of quantum walks applied to graph isomorphism testing
Bruderer, M.; Plenio, M. B.
2016-12-01
Computational advantages gained by quantum algorithms rely largely on the coherence of quantum devices and are generally compromised by decoherence. As an exception, we present a quantum algorithm for graph isomorphism testing whose performance is optimal when operating in the partially coherent regime, as opposed to the extremes of fully coherent or classical regimes. The algorithm builds on continuous-time quantum stochastic walks (QSWs) on graphs and the algorithmic performance is quantified by the distinguishing power between nonisomorphic graphs. The QSW explores the entire graph and acquires information about the underlying structure, which is extracted by monitoring stochastic jumps across an auxiliary edge. The resulting counting statistics of stochastic jumps is used to identify the spectrum of the dynamical generator of the QSW, serving as a novel graph invariant, based on which nonisomorphic graphs are distinguished. We provide specific examples of nonisomorphic graphs that are only distinguishable by QSWs in the presence of decoherence.
Double synthetic thorium phosphates with monazite structure and isomorphic substitutions in them
Shabalin, B.; Krassilshchykova, O. [Inst. of Environmental Geochemistry, Kyiv (Ukraine)
2003-07-01
The double thorium orthophosphates with a formula BTh(PO{sub 4}){sub 2}, where B = Ca, Sr, Cd, REE synthesized by a sol-gel method with subsequent thermal treatment. The samples were studied by methods of XRD and IR-spectroscopy, they were also irradiated. Diffraction powder patterns and IR spectra have shown that all the obtained compounds are structural analogues and belong to monazite structural type. The present type of structure remains constant in a temperature interval from 20 to 1300 C. The mentioned compounds by their immobilizations properties (isomorphic capacity, radiation stability and low solubility) have been compared with the other phosphate compounds and also with complex zirconium-titanium oxides and silicates are proposed as crystal matrices aimed for radioactive waste long-term storage and disposal. (orig.)
Quantum field theory and the linguistic Minimalist Program: a remarkable isomorphism
Piattelli-Palmarini, M.; Vitiello, G.
2017-08-01
By resorting to recent results, we show that an isomorphism exist between linguistic features of the Minimalist Program and the quantum field theory formalism of condensed matter physics. Specific linguistic features which admit a representation in terms of the many-body algebraic formalism are the unconstrained nature of recursive Merge, the operation of the Labeling Algorithm, the difference between pronounced and un-pronounced copies of elements in a sentence and the build-up of the Fibonacci sequence in the syntactic derivation of sentence structures. The collective dynamical nature of the formation process of Logical Forms leading to the individuation of the manifold of concepts and the computational self-consistency of languages are also discussed.
Kauffmann, Steven Kenneth
2013-01-01
The historical Klein-Gordon transformation of complex-valued first-order in time Schroedinger equations iterates these in a naively straightforward way which changes them into complex-valued second-order in time equations that have a plethora of extraneous solutions -- the transformation is an operator-calculus analogue of the squaring of both sides of an algebraic equation. The real and imaginary parts of a Schroedinger equation, however, are well known to be precisely the dynamical equation pair of the real-valued classical Hamiltonian functional which is numerically equal to the expectation value of that Schroedinger equation's Hermitian Hamiltonian operator. The purely real-valued second-order in time Euler-Lagrange equation of the corresponding classical Lagrangian functional is also isomorphic to that Schroedinger equation, and for symmetric Hamiltonians has exactly the same formal appearance as the corresponding naive complex-valued Klein-Gordon equation, but none of the latter's extraneous solutions. ...
Conjecture of Li and Praeger concerning the isomorphisms of Cayley graphs of A5
无
2001-01-01
Let G be a finite group, and S a subset of G1 with S=S-1. We use X=Cay(G,S) to denote the Cayley graph of G with respect to S. We call S a CI-subset of G, if for any isomorphism Cay(G,S)Cay(G,T) there is an α∈Aut(G) such that Sα=T. Assume that m is a positive integer. G is called an m-CI-group if every subset S of G with S=S-1 and |S|≤m is CI. In this paper we prove that the alternating group A5 is a 4-CI-group, which was a conjecture posed by Li and Praeger.
Emery, Jonathan D; Schlepütz, Christian M; Guo, Peijun; Riha, Shannon C; Chang, Robert P H; Martinson, Alex B F
2014-12-24
We report the growth and photoelectrochemical (PEC) characterization of the uncommon bibyite phase of iron(III) oxide (β-Fe2O3) epitaxially stabilized via atomic layer deposition on an conductive, transparent, and isomorphic template (Sn-doped In2O3). As a photoanode, unoptimized β-Fe2O3 ultrathin films perform similarly to their ubiquitous α-phase (hematite) counterpart, but reveal a more ideal bandgap (1.8 eV), a ∼0.1 V improved photocurrent onset potential, and longer wavelength (>600 nm) spectral response. Stable operation under basic water oxidation justifies further exploration of this atypical phase and motivates the investigation of other unexplored metastable phases as new PEC materials.
Ranade, K S; Ali, Mazhar; Ranade, Kedar S.
2007-01-01
Positive maps which are not completely positive are used in quantum information theory as witnesses for convex sets of states, in particular as entanglement witnesses and more generally as witnesses for states having Schmidt number not greater than k. It is known that such witnesses are related to k-positive maps. In this article we propose a new proof for the correspondence between vectors having Schmidt number k and k-positive maps using Jamiolkowski's criterion for positivity of linear maps; to this aim, we also investigate the precise notion of the term "Jamiolkowski isomorphism". As consequences of our proof we get the Jamiolkowski criterion for complete positivity, and we find a special case of a result by Choi, namely that k-positivity implies complete positivity, if k is the dimension of the smaller one of the Hilbert spaces on which the operators act.
Guðmundur Heiðar Frímannsson
2012-03-01
Full Text Available Care ethics is a relatively recent development in ethics, originating in Carol Gilligan´s book In a Different Voice, published in 1982 and pointing out flaws in Kohlberg´s theory of moral development, specifically in choosing only boys for the experiments, in using moral dilemmas to measure moral development, and in his idea that morality only consisted in universal rules.
Header for SpringerLink: Imaging (Section Editors, Thomas Lang and Felix Wehrli)
Seifert, Alan C.; Wehrli, Felix W.
2016-01-01
Magnetic resonance imaging (MRI) plays a pivotal role for assessment of the musculoskeletal system. It is currently the clinical modality of choice for evaluation of soft tissues including cartilage, ligaments, tendons, muscle, and bone marrow. By comparison, the study of calcified tissue by MRI is still in its infancy. In this article we review the potential of the modality for assessment of cortical bone properties known to be affected in degenerative bone disease, with focus on parameters related to matrix and mineral densities, and porosity, by means of emerging solid-state 1H and 31P MRI techniques. In contrast to soft tissues, the MRI signal in calcified tissues has very short lifetime, on the order of 100 μs to a few milliseconds, demanding customized imaging approaches that allow capture of the signal almost immediately after excitation. The technologies described are suited for quantitatively imaging human cortical bone in specimens as well as in vivo in patients on standard clinical imagers, yielding either concentrations in absolute units when measured against a reference standard, or more simply, in the form of surrogate biomarkers. The two major water fractions in cortical bone are those of collagen-bound and pore water occurring at an approximately 3:1 ratio. Collagen-bound water density provides a direct quantitative measure of osteoid density. While at an earlier stage of development, quantification of mineral phosphorus by 31P MRI yields mineral density, and together with knowledge of matrix density, should allow quantification of the degree of bone mineralization. PMID:27048472
Li Metal Anodes and Rechargeable Lithium Metal Batteries. Springer Series in Materials Science
Zhang, Jiguang; Xu, Wu; Henderson, Wesley A.
2017-01-03
Lithium (Li) metal is an ideal anode material for rechargeable batteries. With the urgent need for the “next generation” rechargeable batteries, such as Li-S, Li-air batteries as well as rechargeable Li metal batteries using Li intercalation compounds as the cathode, the use of Li metal anode has attracted significant interests in recent years. Unfortunately, rechargeable batteries based on Li metal anode have not yet been commercialized mainly due to two barriers: one is the growth of Li dendrites and associated safety hazard, and another is the low Coulombic efficiency (CE) of Li cycling and associated early battery failure due to Li powdering and increasing cell impedance. To have a high CE, minimum side reactions between freshly/native deposited Li and electrolyte has to be minimized. These reactions are proportional to the chemical and electrochemical activity of native Li when they are in direct contact with surrounding electrolyte. They are also proportional to the surface area of deposited Li. This means that high CE of Li deposition/stripping always related to a low surface area Li deposition and suppressed Li dendrite growth. Therefore, the enhancement of CE is a more fundamental factors controlling long term, stable cycling of Li metal anode. In this book, we will first review the general models of the dendrite growth mechanism. The effect of SEI layer on the modeling of Li dendrite growth will also be discussed. Then we will discuss various instruments/tools that are critical for the investigation of Li dendrite growth. In the Chapter 3, various factors which affect CE of Li cycling and dendrite growth will be discussed together with an emphasize on enhancement of CE. Chapter 4 of the book will discuss the specific application of Li metal anode in several key rechargeable Li metal batteries, including Li-air batteries, Li-S batteries and Li metal batteries using intercalation compounds as cathode. At last, the perspective on the future development
Xiaolin Ding
Full Text Available Stathmin 1 (STMN1 is a neuronal growth-associated protein that is involved in microtubule dynamics and plays an important role in synaptic outgrowth and plasticity. Given that STMN1 affects fear behavior, we hypothesized that genetic variations in the STMN1 transcriptional regulatory region affect gene transcription activity and control fear behavior. In this study, two single nucleotide polymorphisms (SNPs, g. -327 A>G and g. -125 C>T, were identified in 317 English Springer Spaniels. A bioinformatics analysis revealed that both were loci located in the canine STMN1 putative promoter region and affected transcription factor binding. A statistical analysis revealed that the TT genotype at g.-125 C>T produced a significantly greater fear level than that of the CC genotype (P < 0.05. Furthermore, the H4H4 (GTGT haplotype combination was significantly associated with canine fear behavior (P < 0.01. Using serially truncated constructs of the STMN1 promoters and the luciferase reporter, we found that a 395 bp (-312 nt to +83 nt fragment constituted the core promoter region. The luciferase assay also revealed that the H4 (GT haplotype promoter had higher activity than that of other haplotypes. Overall, our results suggest that the two SNPs in the canine STMN1 promoter region could affect canine fear behavior by altering STMN1 transcriptional activity.
Annus, Taavi, 1977-
2004-01-01
Arvustus: Thiele, Carmen. Selbstbestimmungsrecht und Minderheitenschutz in Estland. Berlin : Springer, 1999 ; Das Recht der nationalen Minderheiten in Osteuropa. Berlin : Berlin Verlag Arno Spitz, 1999
Annus, Taavi, 1977-
2004-01-01
Arvustus: Thiele, Carmen. Selbstbestimmungsrecht und Minderheitenschutz in Estland. Berlin : Springer, 1999 ; Das Recht der nationalen Minderheiten in Osteuropa. Berlin : Berlin Verlag Arno Spitz, 1999
Singh, Chandralekha
2016-01-01
In this companion paper, we explore the use of isomorphic problem pairs (IPPs) to assess introductory physics students' ability to solve and successfully transfer problem-solving knowledge from one context to another in mechanics. We call the paired problems "isomorphic" because they require the same physics principle to solve them. We analyze written responses and individual discussions to a range of isomorphic problems. We examine potential factors that may help or hinder transfer of problem-solving skills from one problem in a pair to the other. For some paired isomorphic problems, one context often turned out to be easier for students in that it was more often correctly solved than the other. When quantitative and conceptual questions were paired and given back to back, students who answered both questions in the IPP often performed better on the conceptual questions than those who answered the corresponding conceptual questions only. Although students often took advantage of the quantitative counterpart ...
On Counting the Number of Non-isomorphic Bipartite Graphs%非同构二部图的计数
徐尚进; 吴正飞; 朱雁
2006-01-01
该文研究的是[m,n]型二部图的计数问题,利用这类图连接矩阵的分类导出了一种组合计数方法.%A combinatoric method which counts the number of non-isomorphic bi-partite graphs with type[m,n]is obtained by classifying their connection matrices.
Graphics Isomorphism in Brand Image Advertising%品牌形象广告中的图形同构
雷鸣
2012-01-01
分析了品牌形象广告中图形创意的价值，结合品牌形象广告的设计实例，论述了品牌形象广告图形的几种类型，从认知心理学角度探讨了图形创造的实质是以图形同构形式存在的提问，进而分析了图形创造的内容是制造图形同构，阐述了制造图形同构的意义。在此基础上，提出了图形内部结构和图形与环境的同构是品牌形象广告创意的一种重要方法，指出了典型素材选取的要点。%It analyzed the value of graphic originality in brand image advertising. Combined with design examples of the brand image advertisement, it discussed the several types of brand image advertising graphic. From the cognitive psychology, it talked over the essence of graphic creation, which was the questions that existed in the form of graphic isomorphism, and analyzed the content of graphic creation, which was manufacturing the graphic isomorphism, and expounded the significance of manufacturing graphic isomorphism. Based on this, it put forward it was a important method that the isomorphism between graphics internal structure and graphics and environment, and pointed out the main points of the selection of typical material.
Isomorphic coalescence of aster cores formed in vitro from microtubules and kinesin motors
Kim, K.; Sikora, A.; Nakazawa, H.; Umetsu, M.; Hwang, W.; Teizer, W.
2016-10-01
We report fluorescence microscopy studies of the formation of aster-like structures emerging from a cellular element-based active system and a novel analysis of the aster condensation. The system consists of rhodamine labeled microtubules which are dynamically coupled by functionalized kinesin motor proteins cross-linked via streptavidin-coated quantum dots (QDs). The aster-shaped objects contain core structures. The cores are aggregates of the QD-motor protein complexes, and result from the dynamic condensation of sub-clusters that are connected to each other randomly. The structural specificity of the aster core reflects a configuration of the initial connectivity between sub-clusters. Detailed image analysis allows us to extract a novel correlation between the condensation speed and the sub-cluster separation. The size of the core is scaled down during the condensation process, following a power law dependence on the distance between sub-clusters. The exponent of the power law is close to two, as expected from a geometric model. This single exponent common to all the contractile lines implies that there exists a time regime during which an isomorphic contraction of the aster core continues during the condensation process. We analyze the observed contraction by using a model system with potential applicability in a wide range of emergent phenomena in randomly coupled active networks, which are prevalent in the cellular environment.
Effect of Isomorphous Substitution on the Thermal Decomposition Mechanism of Hydrotalcites
Sergio Crosby
2014-10-01
Full Text Available Hydrotalcites have many important applications in catalysis, wastewater treatment, gene delivery and polymer stabilization, all depending on preparation history and treatment scenarios. In catalysis and polymer stabilization, thermal decomposition is of great importance. Hydrotalcites form easily with atmospheric carbon dioxide and often interfere with the study of other anion containing systems, particularly if formed at room temperature. The dehydroxylation and decomposition of carbonate occurs simultaneously, making it difficult to distinguish the dehydroxylation mechanisms directly. To date, the majority of work on understanding the decomposition mechanism has utilized hydrotalcite precipitated at room temperature. In this study, evolved gas analysis combined with thermal analysis has been used to show that CO2 contamination is problematic in materials being formed at RT that are poorly crystalline. This has led to some dispute as to the nature of the dehydroxylation mechanism. In this paper, data for the thermal decomposition of the chloride form of hydrotalcite are reported. In addition, carbonate-free hydrotalcites have been synthesized with different charge densities and at different growth temperatures. This combination of parameters has allowed a better understanding of the mechanism of dehydroxylation and the role that isomorphous substitution plays in these mechanisms to be delineated. In addition, the effect of anion type on thermal stability is also reported. A stepwise dehydroxylation model is proposed that is mediated by the level of aluminum substitution.
Wang, Fei; Wang, Liming; Han, Yan; Liu, Bin; Wang, Jian; Su, Xinyan
2014-01-01
Nowadays, there is a greater need for energy efficient and stable underwater sensor networks (UWSNs). Underwater sensors usually do not have enough power, so the goal of underwater sensor networks is to make the network have a long lifetime. An underwater heterogeneous sensor network (UWHSN) is one way to cluster the sensors, and the application of UWHSNs is simple and fast, but robots, lifetime and energy-partition are all drawbacks of UWHSNs. In this paper we propose the underwater isomorphic sensor network (UWISN) clustering technology. By analyzing the characteristics of UWISNs, we determine that an UWISN has strong expansibility, mobility, energy-efficiency and long lifetime. An UWISN adopts normal sensor nodes to be cluster heads, and these cluster heads communicate with each other. This paper seeks the optimal number of clusters and uses FCM to elect cluster heads and establish the network. In addition, an idea of real cluster heads and the method to elect them have been proposed. Finally, the simulation results show that the solution is effective and UWISNs can improve the energy consumption of an UWSN.
Challenging the time complexity of exact subgraph isomorphism for huge and dense graphs with VF3.
Carletti, Vincenzo; Foggia, Pasquale; Saggese, Alessia; Vento, Mario
2017-04-24
Graph matching is essential in several fields that use structured information, such as biology, chemistry, social networks, knowledge management, document analysis and others. Except for special classes of graphs, graph matching has in the worst-case an exponential complexity; however, there are algorithms that show an acceptable execution time, as long as the graphs are not too large and not too dense. In this paper we introduce a novel subgraph isomorphism algorithm, VF3, particularly efficient in the challenging case of graphs with thousands of nodes and a high edge density. Its performance, both in terms of time and memory, has been assessed on a large dataset of 12700 random graphs with a size up to 10000 nodes, made publicly available. VF3 has been compared with four other state-of-the-art algorithms, and the huge experimentation required more than two years of processing time. The results confirm that VF3 definitely outperforms the other algorithms when the graphs become huge and dense, but also has a very good performance on smaller or sparser graphs.
Chia-Yu Chou
2014-09-01
Full Text Available In a previous study we provided analytical and experimental evidence that some materials are able to store entropy-flow, of which the heat-conduction behaves as standing waves in a bounded region small enough in practice. In this paper we continue to develop distributed control of heat conduction in these thermal-inductive materials. The control objective is to achieve subtle temperature distribution in space and simultaneously to suppress its transient overshoots in time. This technology concerns safe and accurate heating/cooling treatments in medical operations, polymer processing, and other prevailing modern day practices. Serving for distributed feedback, spatiotemporal H ∞ /μ control is developed by expansion of the conventional 1D-H ∞ /μ control to a 2D version. Therein 2D geometrical isomorphism is constructed with the Laplace-Galerkin transform, which extends the small-gain theorem into the mode-frequency domain, wherein 2D transfer-function controllers are synthesized with graphical methods. Finally, 2D digital-signal processing is programmed to implement 2D transfer-function controllers, possibly of spatial fraction-orders, into DSP-engine embedded microcontrollers.
Isomorphous Crystals from Diynes and Bromodiynes Involved in Hydrogen and Halogen Bonds
Pierre Baillargeon
2016-04-01
Full Text Available Isomorphous crystals of two diacetylene derivatives with carbamate functionality (BocNH-CH2-diyne-X, where X = H or Br have been obtained. The main feature of these structures is the original 2D arrangement (as supramolecular sheets or walls in which the H bond and halogen bond have a prominent effect on the whole architecture. The two diacetylene compounds harbor neighboring carbamate (Boc protected amine and conjugated alkyne functionalities. They differ only by the nature of the atom located at the penultimate position of the diyne moiety, either a hydrogen atom or a bromine atom. Both of them adopt very similar 2D wall organizations with antiparallel carbamates (as in antiparallel beta pleated sheets. Additional weak interactions inside the same walls between molecular bricks are H bond interactions (diyne-H···O=C or halogen bond interactions (diyne-Br···O=C, respectively. Based on crystallographic atom coordinates, DFT (B3LYP/6-31++G(d,p and DFT (M06-2X/6-31++G(d,p calculations were performed on these isostructural crystals to gain insight into the intermolecular interactions.
Koberda, Thomas
2010-01-01
Consider the mapping class group $\\Mod_{g,n}$ of a surface of finite type and a finite collection $F$ of mapping classes. In this paper we prove that there are positive exponents such that after replacing the elements of $F$ by the corresponding powers, they generate a right-angled Artin group. Under some further suitable hypotheses, these mapping classes are the vertex generators of the underlying graph, or form a right-angled Artin system in the terminology which we shall develop. We prove an analogous result for a finite volume real and complex hyperbolic $n$-manifolds, thus establishing the primary result as a rank one type phenomenon for the mapping class group. We also show the unsolvability of the isomorphism problem for finitely generated subgroups of $\\Mod_{g,n}$, and prove a homological rigidity result for right-angled Artin groups which implies a solution to the isomorphism problem for right-angled Artin groups. We thus solve a generalized isomorphism problem for finitely generated subgroups of $\\M...
施普林格数字出版之路——SpringerLink,技术与内容结合的一种范式
于成; 张大伟
2014-01-01
文章认为SpringerLink平台在施普林格的数字化转型中占有非常重要的地位.施普林格在信息技术革命带来的挑战下,正确选择了XML及其相关技术作为网络平台的技术基础,生成了成熟的STM数字出版模式.SpringerLink的不断发展和完善,为创造新的盈利模式提供了载体,为建立新的网络平台积累了经验.围绕SpringerLink展开的数字出版实践表明,以XML及其相关技术为手段建立数字出版平台、提供内容服务,实现了内容与技术的完美结合,是STM出版实现数字化转型的有效路径.
Equivalence Relations of -Algebra Extensions
Changguo Wei
2010-04-01
In this paper, we consider equivalence relations of *-algebra extensions and describe the relationship between the isomorphism equivalence and the unitary equivalence. We also show that a certain group homomorphism is the obstruction for these equivalence relations to be the same.
Abel-Jacobi isomorphism for one cycles on Kirwan's resolution of the moduli space SU_C(2,O_C)
Iyer, Jaya NN
2010-01-01
In this paper, we consider the moduli space $\\cSU_C(r,\\cO_C)$ of rank $r$ semistable vector bundles with trivial determinant on a smooth projective curve $C$ of genus $g$. When the rank $r=2$, F. Kirwan constructed a smooth log resolution $\\ov{X}\\rar \\cSU_C(2,\\cO_C)$. Based on earlier work of M. Kerr and J. Lewis, Lewis explains in the Appendix the notion of a relative Chow group (w.r.to the normal crossing divisor), and a subsequent Abel-Jacobi map on the relative Chow group of null-homologous one cycles (tensored with $\\Q$). This map takes values in the intermediate Jacobian of the compactly supported cohomology of the stable locus. We show that this is an isomorphism and since the intermediate Jacobian is identified with the Jacobian $Jac(C)\\otimes \\Q$, this can be thought of as a weak-representability result for open smooth varieties. A Hard Lefschetz theorem is also proved for the odd degree bottom weight cohomology of the moduli space $\\cSU_C^s(2,\\cO_C)$. When the rank $r\\geq 2$, we compute the codimens...
Representations of a Noncommutative Associative Algebra Related to Quantum Torus of Rank Three
Shang Yuan LIN; Bin XIN
2005-01-01
In this paper, we present some modules over the rank-three quantized Weyl algebra, which are closely related to modules over some vertex algebras. The isomorphism classes among these modules are also determined.
On the continuity of the map square root of nonnegative isomorphisms in Hilbert spaces
Jeovanny de Jesus Muentes Acevedo
2015-06-01
Full Text Available Let H be a real (or complex Hilbert space. Every nonnegative operator L ∈ L(H admits a unique nonnegative square root R ∈ L(H, i.e., a nonnegative operator R ∈ L(H such that R2 = L. Let GL+ S (H be the set of nonnegative isomorphisms in L(H. First we will show that GL+ S (H is a convex (real Banach manifold. Denoting by L1/2 the nonnegative square root of L. In [3], Richard Bouldin proves that L1/2 depends continuously on L (this proof is non-trivial. This result has several applications. For example, it is used to find the polar decomposition of a bounded operator. This polar decomposition allows us to determine the positive and negative spectral subespaces of any self-adjoint operator, and moreover, allows us to define the Maslov index. The autor of the paper under review provides an alternative proof (and a little more simplified that L1/2 depends continuously on L, and moreover, he shows that the map is a homeomorphism. Resumen. Sea H un espacio de Hilbert real (o complejo. Todo operador no negativo L ∈ L(H admite una única raíz cuadrada no negativa R ∈ L(H, esto es, un operador no negativo R ∈ L(H tal que R2 = L. Sea GL+ S (H el conjunto de los isomorfismos no negativos en L(H. Primero probaremos que GL+ S (H es una variedad de Banach (real. Denotando como L1/2 la raíz cuadrada no negativa de L, en [3] Richard Bouldin prueba que L1/2 depende continuamente de L (esta prueba es no trivial. Este resultado tiene varias aplicaciones. Por ejemplo, es usado para encontrar la descomposición polar de un operador limitado. Esta descomposición polar nos lleva a determinar los subespacios espectrales positivos y negativos de cualquier operador autoadjunto, y además, lleva a definir el índice de Máslov. El autor de este artículo da una prueba alternativa (y un poco más simplificada de que L1/2 depende continuamente de L, y además, prueba que la aplicación es un homeomorfismo
解析同构在座椅设计中的应用%The Application of Isomorphism in Chair Design
钱宇; 蔡文明
2012-01-01
分析了同构原理的内涵,并结合实例论述了同构原理对座椅设计的指导价值。通过分析座椅形态、结构、色彩、质感和肌理设计中同构原理的运用,从功能性、审美性和整体性等方面阐述了运用同构原理进行座椅设计的基本原则。对同构表现手法和座椅设计结合点的深入研究和探讨,有助于寻找座椅形态设计的方法,进而为产品的开发和创新铺路。%It analyzed the connotation of isomorphism,combined with examples,it elaborated the guidance value of isomorphism to chair design.Starting from the application of isomorphism to forms,structures,colors and textures in chair design,it explicated the guiding principles from the perspective of aesthetics and integrity.A profound study of the combination of isomorphism and chair design helps to find out ways to design chair shapes.Isomorphic principles are also conducive to breakthroughs and innovation in production.
Wang, Jimin; Askerka, Mikhail; Brudvig, Gary W; Batista, Victor S
2017-02-10
Understanding structure-function relations in photosystem II (PSII) is important for the development of biomimetic photocatalytic systems. X-ray crystallography, computational modeling, and spectroscopy have played central roles in elucidating the structure and function of PSII. Recent breakthroughs in femtosecond X-ray crystallography offer the possibility of collecting diffraction data from the X-ray free electron laser (XFEL) before radiation damage of the sample, thereby overcoming the main challenge of conventional X-ray diffraction methods. However, the interpretation of XFEL data from PSII intermediates is challenging because of the issues regarding data-processing, uncertainty on the precise positions of light oxygen atoms next to heavy metal centers, and different kinetics of the S-state transition in microcrystals compared to solution. Here, we summarize recent advances and outstanding challenges in PSII structure-function determination with emphasis on the implementation of quantum mechanics/molecular mechanics techniques combined with isomorphous difference Fourier maps, direct methods, and high-resolution spectroscopy.
Lin, Shih-Yin
2016-01-01
In this study, we examine introductory physics students' ability to perform analogical reasoning between two isomorphic problems which employ the same underlying physics principles but have different surface features. Three hundred and eighty two students from a calculus-based and an algebra-based introductory physics course were asked to learn from a solved problem provided and take advantage of what they learned from it to solve another isomorphic problem (which we call the quiz problem). The solved problem provided has two sub-problems while the quiz problem has three sub-problems, which is known to be challenging for introductory students from previous research. In addition to the solved problem, students also received extra scaffolding supports that were intended to help them discern and exploit the underlying similarities of the isomorphic solved and quiz problems. The results suggest that students had great difficulty in transferring what they learned from a 2-step problem to a 3-step problem. Although...
Baird, James K; Baker, Jonathan D; Hu, Baichuan; Lang, Joshua R; Joyce, Karen E; Sides, Alison K; Richey, Randi D
2015-03-12
Binary liquid mixtures having a consolute point can be used as solvents for chemical reactions. When excess cerium(IV) oxide is brought into equilibrium with a mixture of isobutyric acid + water, and the concentration of cerium in the liquid phase is plotted in van't Hoff form, a straight line results for temperatures sufficiently in excess of the critical solution temperature. Within 1 K of the critical temperature, however, the concentration becomes substantially suppressed, and the van't Hoff slope diverges toward negative infinity. According to the phase rule, one mole fraction can be fixed. Given this restriction, the temperature behavior of the data is in exact agreement with the predictions of both the principle of critical point isomorphism and the Gibbs-Helmholtz equation. In addition, we have determined the concentration of lead in the liquid phase when crystalline lead(II) sulfate reacts with potassium iodide in isobutyric acid + water. When plotted in van't Hoff form, the data lie on a straight line for all temperatures including the critical region. The phase rule indicates that two mole fractions can be fixed. With this restriction, the data are in exact agreement with the principle of critical point isomorphism.
Tröger, Beate
1997-01-01
Rezension von: Johann Heinrich Pestalozzi: Sämtliche Werke und Briefe auf CD-ROM. Konzeption und Bearbeitung: Leonhard Friedrich und Sylvia Springer. Hrsg. v. Pestalozzianum Zürich. Retrievalsoftware: CDIS (Fa. Makrolog Wiesbaden) 1994.
Virtual Amalgamation of Relatively Quasiconvex Subgroups
Martinez-Pedroza, Eduardo
2012-01-01
For relatively hyperbolic groups, we investigate conditions guaranteeing that the subgroup generated by two relatively quasiconvex subgroups $Q_1$ and $Q_2$ is relatively quasiconvex and isomorphic to $Q_1 \\ast_{Q_1 \\cap Q_2} Q_2$. The main theorem extends results for quasiconvex subgroups of word-hyperbolic groups, and results for discrete subgroups of isometries of hyperbolic spaces.
A Model of Egoistical Relative Deprivation
Crosby, Faye
1976-01-01
Examines the theory of relative deprivation. This theory states, basically, that objective and subjective well-being are not isomorphically related, so that sometimes the better-off one is, the worse-off one feels subjectively. After a brief review of work in the area of relative deprivation, a formal model is developed. (Editor/RK)
周启海
2003-01-01
In this paper, the new viewpoint about the objectized (i. e. object-oriented) program design in all kinds of computer languages, hich should and could be isomorphized, is advanced, and the new direction of isomorphized teaching reform and blazing new trails of education for objectized program design.
曹红兵
2004-01-01
文章从期刊收录情况、检索能力、文献提供能力三方面,对两大西文电子期刊全文检索系统--Elsevier SDOS和SpringerLink进行了对比和研究,旨在帮助人们更好地了解和利用这两大检索系统,提高系统的使用效率.
G. Galán Marín
2002-05-01
Full Text Available Un problema de importancia primordial en el diseño mecánico es identificar los mecanismos isomorfos, puesto que los isomorfismos nodetectados generan soluciones duplicadas y por tanto suponen un esfuerzo innecesario en el proceso de diseño. Desde 1960, una grancantidad de métodos han sido propuestos para la detección de mecanismos isomorfos. Sin embargo, diversos trabajos han mostrado queaunque pueden existir algoritmos eficaces para casos particulares, en el caso general los métodos tradicionales para la detección deisomorfismos en cadenas cinemáticas no proporcionan usualmente soluciones eficientes para este problema, que ha sido clasificado comoNP-duro. Un eficaz método alternativo para la resolución de problemas NP-duros ha surgido recientemente con las redes neuronales. Eneste trabajo proponemos un nuevo modelo de red neuronal binaria diseñado para la resolución del problema de detección de mecanismosisomorfos. El modelo propuesto se halla basado en unas dinámicas discretas que garantizan una rápida y correcta convergencia de la redhacia soluciones aceptables. Las simulaciones numéricas muestran en los mecanismos analizados que la red neuronal propuestaproporciona excelentes resultados, mostrándose además muy superior a la red de Hopfield continua tradicional en lo que respecta al tiempode computación y en la facilidad de su implementación.Palabras claves: Mecanismos isomorfos, síntesis de mecanismos, isomorfismo de grafos, red neuronal binaria,redes de Hopfield.____________________________________________________________________________AbstractAn important step in the kinematic mechanism synthesis process is to identify graph isomorphism whilegenerating new mechanisms. Undetected isomorphisms result in duplicate solutions and unnecessary effort.Since 1960, a lot of methods have been proposed for the graph isomorphism identification. Some authors haveconcluded that, in the general case, the traditional methods of
Statistical Analysis on Chinese Journals Published by Springer-Verlag of Germany%Springer出版中国期刊的统计分析
何建新
2007-01-01
本文对德国Springer出版公司近年来出版的中国期刊的情况进行了简要的介绍,对目前SpringerLink在线的47种中国期刊(包括Springer公司独立出版及与中国出版公司合作出版)和10000多篇文献在所属学科、在线时间年限及出版类型等方面的进行了统计分析.结果表明,出版的期刊以工程学、物理天文学、地球环境科学及数学统计学为主,收录的在线文献以数学、工程学及物理学居多.
论“物感”说中的“同型论”内涵%On the Connotation of Isomorphism in the Theory of Substance Emotionalism
李晨
2016-01-01
“物感”说是中国古代文论当中的一个重要概念。该文运用格式塔的“同型论”理论对“物感”说进行探讨，主要从力的结构和异质同构两个方面展开分析，以期对“物感”说的理解能够达到一个新的高度。%The Theory of Substance Emotionalism is an important concept in ancient Chinese literary theory.The paper attempts to discuss the Theory of Substance Emotionalism by means of the theory of iso-morphism and to improve the understanding of the Theory of Substance Emotionalism through the analysis of the structure of force and heterogeneous isomorphism.
Isomorphic series of double sulfites of the Cu2SO3.MSO3.2H2O (M = Cu, Fe, Mn, and Cd Type: a review
Silva Luciana A. da
2004-01-01
Full Text Available Although the first mixed valence double sulfite, Cu2SO3.CuSO3.2H2O, was prepared in the early 19th century by M. Chevreul, interest in this type of compound was only rekindled in the mid-1960s, when the crystalline structure of Chevreul's salt was determined and its infrared spectrum characterized. Studies of this type of compound have been intensified in recent years, especially after the discovery that the isomorphic Cu(II in Chrevreul's salt could be replaced by a divalent metal ion, forming an isomorphic series whose properties are strongly dependent on the nature of the M(II cation. Because of their interesting properties, these mixed valence systems can be used as models to identify intermediates in atmospheric corrosion processes, and to evaluate the role of transition metals as catalysts of S(IV autoxidation in the conversion of SO2 in the atmosphere.
Barniol, Pablo; Zavala, Genaro
2014-12-01
In this article we compare students' understanding of vector concepts in problems with no physical context, and with three mechanics contexts: force, velocity, and work. Based on our "Test of Understanding of Vectors," a multiple-choice test presented elsewhere, we designed two isomorphic shorter versions of 12 items each: a test with no physical context, and a test with mechanics contexts. For this study, we administered the items twice to students who were finishing an introductory mechanics course at a large private university in Mexico. The first time, we administered the two 12-item tests to 608 students. In the second, we only tested the items for which we had found differences in students' performances that were difficult to explain, and in this case, we asked them to show their reasoning in written form. In the first administration, we detected no significant difference between the medians obtained in the tests; however, we did identify significant differences in some of the items. For each item we analyze the type of difference found between the tests in the selection of the correct answer, the most common error on each of the tests, and the differences in the selection of incorrect answers. We also investigate the causes of the different context effects. Based on these analyses, we establish specific recommendations for the instruction of vector concepts in an introductory mechanics course. In the Supplemental Material we include both tests for other researchers studying vector learning, and for physics teachers who teach this material.
Manoj K Lohumi; Aas Mohammad; Irshad A Khan
2015-04-01
Some new invariants like chain string, link identiﬁcation string, loop participation of joint frequency string and loop size frequency string of simple jointed kinematic chains are presented. The ﬁrst step of the proposed method is to identify all possible loops of a kinematic chain and then these new invariants are developed. A modiﬁed loop-joint approach is proposed in this work as compared to the previous work in literature where loop-link matrix is formulated to search all the loops present in a kinematic chain. A computer program has been developed for formulating loop-joint matrix of kinematic chain and its all invariants. This method takes into consideration all the loops present, associated joints and links and is able to test isomorphism among kinematic chains and their inversions and also to detect type of mobility of multi degree of freedom kinematic chains. The proposed method is successfully tested for all kinematic chains upto ﬁve independent loops having any number of degree of freedom and no counter example is found. The detailed results of 9-link, M = 2 (mobility) and 10 link, M = 3 kinematic chains are provided with ﬁve types of mobility and results are in accordance with the results published in literature. The method is also explained with the help of some complex examples and presented in this paper.
Springer handbook of ocean engineering
Xiros, Nikolaos
2016-01-01
The handbook is the definitive reference for the interdisciplinary field that is ocean engineering. It integrates the coverage of fundamental and applied material and encompasses a diverse spectrum of systems, concepts and operations in the maritime environment, as well as providing a comprehensive update on contemporary, leading-edge ocean technologies. Coverage includes but is not limited to; an overview of ocean science, ocean signals and instrumentation, coastal structures, developments in ocean energy technologies, and ocean vehicles and automation. The handbook will be of interest to practitioners in a range of offshore industries and naval establishments as well as academic researchers and graduate students in ocean, coastal, offshore, and marine engineering and naval architecture.
Springer handbook of computational intelligence
Pedrycz, Witold
2015-01-01
This is the first book covering the basics and the state of the art and important applications of the complete growing discipline of computational intelligence. This comprehensive handbook presents a unique synergy of various approaches and new qualities to be gained by using hybrid approaches, incl. inspirations from biology and living organisms and animate systems. The text is organized in 7 main parts foundations, fuzzy sets, rough sets, evolutionary computation, neural networks, swarm intelligence and hybrid computational intelligence systems.
Is There Release from Masking from Isomorphism between Perception and Action?
Tara C. Dennehy
2014-03-01
Full Text Available The phenomenon of “entry into awareness” is one of the most challenging puzzles in neuroscience. Research has shown how entry is influenced by processes that are “bottom-up” (e.g., stimulus salience, motion, novelty, incentive and emotional quality and associated with working memory. Although consciousness is intimately related to action, action-based entry remains under-explored. We review research showing that action-related processing influences the nature of percepts already in conscious awareness and present three experiments that, using a “release-from-masking” technique, examine whether action plans can also influence that which enters awareness in the first place. The present data, though intriguing and consistent with previous research, are not definitive. The limitations and theoretical implications of the findings are discussed. We hope that these experiments will spur further investigation of this understudied topic.
Shafia, Ehsan [Politecnico di Torino, Department of Applied Science and Technology and INSTM Unit of Torino-Politecnico (Italy); Esposito, Serena [Università degli Studi di Cassino e del Lazio Meridionale, Department of Civil and Mechanical Engineering (Italy); Manzoli, Maela; Chiesa, Mario [Università di Torino, Dipartimento di Chimica and Centro Interdipartimentale NIS (Italy); Tiberto, Paola [Electromagnetism, I.N.Ri.M. (Italy); Barrera, Gabriele [Università di Torino, Dipartimento di Chimica and Centro Interdipartimentale NIS (Italy); Menard, Gabriel [Harvard University, Department of Chemistry and Chemical Biology (United States); Allia, Paolo, E-mail: paolo.allia@polito.it [Politecnico di Torino, Department of Applied Science and Technology and INSTM Unit of Torino-Politecnico (Italy); Freyria, Francesca S. [Massachusetts Institute of Technology, Department of Chemistry (United States); Garrone, Edoardo; Bonelli, Barbara, E-mail: barbara.bonelli@polito.it [Politecnico di Torino, Department of Applied Science and Technology and INSTM Unit of Torino-Politecnico (Italy)
2015-08-15
Textural, magnetic and spectroscopic properties are reported of Fe-doped aluminosilicate nanotubes (NTs) of the imogolite type, IMO, with nominal composition (OH){sub 3}Al{sub 2−x}Fe{sub x}O{sub 3}SiOH (x = 0, 0.025, 0.050). Samples were obtained by either direct synthesis (Fe-0.025-IMO, Fe-0.050-IMO) or post-synthesis loading (Fe-L-IMO). The Fe content was either 1.4 wt% (both Fe-0.050-IMO and Fe-L-IMO) or 0.7 wt% (Fe-0.025-IMO). Textural properties were characterized by High-Resolution Transmission Electron Microscopy, X-ray diffraction and N{sub 2} adsorption/desorption isotherms at 77 K. The presence of different iron species was studied by magnetic moment measurements and three spectroscopies: Mössbauer, UV–Vis and electron paramagnetic resonance, respectively. Fe{sup 3+}/Al{sup 3+} isomorphic substitution (IS) at octahedral sites at the external surface of NTs is the main process occurring by direct synthesis at low Fe loadings, giving rise to the formation of isolated high-spin Fe{sup 3+} sites. Higher loadings give rise, besides IS, to the formation of Fe{sub 2}O{sub 3} clusters. IS occurs up to a limit of Al/Fe atomic ratio of ca. 60 (corresponding to x = 0.032). A fraction of the magnetism related to NCs is pinned by the surface anisotropy; also, clusters are magnetically interacting with each other. Post-synthesis loading leads to a system rather close to that obtained by direct synthesis, involving both IS and cluster formations. Slightly larger clusters than with direct synthesis samples, however, are formed. The occurrence of IS indicates a facile cleavage/sealing of Al–O–Al bonds: this opens the possibility to exchange Al{sup 3+} ions in pre-formed IMO NTs, a much simpler procedure compared with direct synthesis.
Application of Isomorphic Ca-Si Rocks for the Synthesis of α-C2S Hydrate
Raimundas ŠIAUČIŪNAS
2014-09-01
Full Text Available There are approximately 35 million t of carbonate opoka and 21 million t of chalk marl in Lithuania. These materials are suitable for the production of various hydraulic binders. In this work, the influence of burning temperature (700 °C – 950 °C and duration (0.5 h – 2 h on the calcination of isomorphic Ca-Si rocks was investigated. The goal was to prepare a mixture of opoka and chalk marl that would be reactive enough for the hydrothermal synthesis of various calcium silicate hydrates, as this would suggest another potential use of these stocks. It was determined that the largest amount of free CaO (59.09 % is obtained after burning opoka for 2 h at 750 °C and after burning chalk marl for 2 h at 800 °C (84.22 %. The remaining CaO is bound to the structure of poorly crystalline pseudowollastonite, which transforms to wollastonite when the temperature of the thermal treatment is increased. Because the calcination temperature of both materials is similar, they can be burned simultaneously; this would significantly simplify the preparation procedure of these mixtures. The optimal temperature for burning the opoka – chalk marl mixture with a molar ratio of CaO/SiO2 = 2 (62.8 % chalk marl and 37.2 % opoka was determined to be 825 °C for 2 h. In this case, the amount of free CaO is the largest and the crystals of formed wollastonite are poorly crystalline. This blend was treated hydrothermally at 200 °C for 24 h. The dominant product of the synthesis was α-C2S hydrate, which in literature was reported to be the main constituent in the production of new hydraulic binder. DOI: http://dx.doi.org/10.5755/j01.ms.20.3.4426
Thakur, Amitha; Kumar, Dinesh; Thipparaboina, Rajesh; Shastri, Nalini R.
2014-11-01
Control of crystal morphology during crystallization is a paramount challenge in pharmaceutical processing. Hence, there is need to introduce computational methods for morphology prediction to manage production cost of drugs and improve related pharmaceutical and biopharmaceutical properties. Layer docking approach with molecular dynamics opens a new avenue for crystal habit prediction in presence of solvent. In the present study, attempts were made to correlate predicted and experimental crystal habits of fluconazole considering solvent interactions using layer docking approach. Simulated results from layer docking approach with methanol as solvent gave two dominant facets (0 1 1) and (1 0 1) with a surface area 22.43% and 19.82% respectively, which were in agreement with the experimental results. Experimentally grown modified crystal habit of fluconazole in methanol showed enhanced dissolution rate (pfluconazole recrystallized in methanol was significantly improved when compared to plain drug. This study demonstrates a methodical approach using computational tools for prediction and modification of crystal habit, to enhance dissolution of poorly soluble drugs, for future pharmaceutical applications.
YANG Jiaxi; LIU Liang
2004-01-01
Dissolution of pyroxene in garnet at ultrahigh pressures produces supersilicic garnet with the coupled substitutions of SiⅥ + MⅥ= AlⅥ + AlⅥ and SiⅥ + NaⅧ=AlⅥ + MⅧ, which are enhanced by rising pressure. The supersilicic garnet and exsolution of pyroxene, rutile, apatite and quartz in garnet during decompression were found in natural rocks, pointing to the importance in studying mantle-derived rocks and ultrahigh pressure metamorphism related to plate deep subduction. Ti, P, K and H2O enters garnet via the substitutions of Ti = Si, PⅣ+NaⅧ = SiⅣ+ CaⅧ, SiⅥ+KⅧ = AlⅥ+MⅧ, and [(OH)4]4- = [SiO4]4- or [4H]4+ = Si4+ respectively. The possible entering of Eskola pyroxene component M0.5AlSi2O6 in clinopyroxene, together with the common pyroxene component M2Si2O6, into garnet can lead to the presence of the substitution of SiⅥ + 0.5□Ⅷ= AlⅥ + 0.5MⅧ in garnet structure, which plays a key role in the exsolution of rutile, apatite and quartz in garnet. Two new breakdown reactions are thus proposed on the basis of the new coupled substitution, which can be regarded as a theoretical model for the exsolution of the 3 minerals in garnet. The real exsolution may be a combination of several breakdown reactions.
张红燕
2011-01-01
CNKI和SpringerLink是查找经济与管理科学期刊的重要全文数据库.本文在在线调查的基础上,对这2种数据库从收录范围、全文期刊种数、在线帮助、浏览方式、检索途径、检索结果排序、引文格式下载方式、在线预先发行期刊、数据库内外文献链接以及个性化服务等方面进行了对比分析,为检索经济与管理科学期刊文献提供帮助和参考.
高燕红
2011-01-01
数字化环境下,外文全文电子数据库反映了各个学科领域的最新研究和进展,对于本学科领域内的科研起着重要的指导作用,受到越来越多科研人员的追捧.文章以中国国家图书馆购买的国际知名产品SpringerLink(德国施普林格电子期刊)网络平台为例,论述了基于数字出版的外文期刊全文数据库服务模式的特点,并提出了图书馆对于数字资源强势发展下的思考.参考文献5.
Pablo Forni
2006-12-01
Full Text Available En este artículo, buscamos brindar elementos para un marco analítico para abordar las organizaciones del tercer sector en los países periféricos, observando principalmente sus idiosincrasias. Para ello, realizamos un análisis de la literatura producida en la Argentina en los años 90 a la luz del enfoque neoinstitucional en los estudios organizacionales, mostrando la existencia de fuerzas isomórficas resultantes de los diferentes actores involucrados en el proceso de conformación del tercer sector. Éstas pueden ser englobadas en un isomorfismo periférico que moldea las estructuras, procedimientos, relaciones externas y temáticas abordadas por las organizaciones del tercer sector.In this article we intend to offer elements for an analytical framing to study third-sector organizations in peripheral countries, particularly by observing their idiosyncrasies. In order to do that, we have carried out a review of literature produced in Argentina in the 1990s in the light of isomorphic forces resulting from distinct actors involved in the process of constitution of the third sector. Those forces can be seen within a peripheral isomorphism that shapes structures, procedures, external relations, and themes approached by third-sector organizations.
Takacs, Christopher J; Sun, Yanming; Welch, Gregory C; Perez, Louis A; Liu, Xiaofeng; Wen, Wen; Bazan, Guillermo C; Heeger, Alan J
2012-10-10
We examine the correlations of the dipole moment and conformational stability to the self-assembly and solar cell performance within a series of isomorphic, solution-processable molecules. These charge-transfer chromophores are described by a D(1)-A-D-A-D(1) structure comprising electron-rich 2-hexylbithiophene and 3,3'-di-2-ethylhexylsilylene-2,2'-bithiophene moieties as the donor units D(1) and D, respectively. The building blocks 2,1,3-benzothiadiazole (BT) and [1,2,5]thiadiazolo[3,4-c]pyridine (PT) were used as the electron-deficient acceptor units A. Using a combination of UV-visible spectroscopy, field-effect transistors, solar cell devices, grazing incident wide-angle X-ray scattering, and transmission electron microscopy, three PT-containing compounds (1-3) with varying regiochemistry and symmetry, together with the BT-based compound 5,5'-bis{(4-(7-hexylthiophen-2-yl)thiophen-2-yl)-[1,2,5]thiadiazolobenzene}-3,3'-di-2-ethylhexylsilylene-2,2'-bithiophene (4), are compared and contrasted in solution, in thin films, and as blends with the electron acceptor [6,6]-phenyl-C(70)-butyric acid methyl ester. The molecules with symmetric orientations of the PT acceptor, 1 and 2, yield highly ordered blended thin films. The best films, processed with the solvent additive 1,8-diiodooctane, show donor "crystallite" length scales on the order of 15-35 nm and photovoltaic power conversion efficiencies (PCEs) of 7.0 and 5.6%, respectively. Compound 3, with an unsymmetrical orientation of PT heterocycles, shows subtle differences in the crystallization behavior and a best PCE of 3.2%. In contrast, blends of the BT-containing donor 4 are highly disordered and give PCEs below 0.2%. We speculate that the differences in self-assembly arise from the strong influence of the BT acceptor and its orientation on the net dipole moment and geometric description of the chromophore.
高瑞梅; 孙艳
2015-01-01
The Orlik-Solomon algebra is the quotient of the exterior algebra E based on A by a homogeneous ideal I. The relations between a quadratic arrangement and a quadratic Gröbner basis are studied.And the proof of the conclu-sion that a central arrangement is a quadratic arrangement if and only if I has a quadratic Gröbner basis is given.We do some research on the Orlik-Solomon algebras for central and affine arrangements,and give the isomorphism theorems for the top dimensional parts of Orlik-Solomon algebras.%Orlik-Solomon 代数是基于构形 A 的外代数 E 模去一个齐次理想 I 的商代数。研究了二次构形与二次Gröbner 基之间的关系，得到了中心构形 A 是一个二次构形当且仅当 I 具有二次 Gröbner 基，给出了直接证明。对于构形的 Orlik-Solomon 代数，分别针对中心构形和仿射构形给出了其最高次分支的同构定理。
Nicholas H Bexfield
Full Text Available Chronic hepatitis (CH is common in dogs in the United Kingdom. An increased prevalence of the disease is seen in the English Springer spaniel (ESS, and this breed suffer from a severe form with young to middle aged female dogs being predisposed. The disease shares histological features with those of human viral hepatitis, although the specific aetiological agent has not yet been identified. The aim of the current study was to investigate whether dog leucocyte antigen (DLA class II alleles and haplotypes are associated with susceptibility/resistance to CH in the ESS. Sequence-based genotyping of the polymorphic exon 2 from DLA-DRB1, -DQA1 and -DQB1 class II loci were performed in 66 ESSs with CH and 84 healthy controls. There was a significant difference in the distribution of the protective alleles DRB1*00501 (3.0% vs. 12.0%, odds ratio [OR] = 0.23, 95% confidence interval [CI] = 0.06-0.74 and DQB1*00501 (3.8% vs. 12.0%, OR = 0.29, 95% CI = 0.09-0.85 between cases and controls. The haplotype DLA-DRB1*00501/DQA1*00301/DQB1*00501 was present in 11.9% of controls and 3.0% of cases and was significantly associated with protection against disease development (OR = 0.26, 95% CI = 0.08-0.80. There was a significant difference in the distribution of the risk alleles DRB1*00601 (14.4% vs. 6.5%, OR = 2.40, 95% CI = 1.10-5.63 and DQB1*00701 (14.4% vs. 6.5%, OR = 2.40, 95% CI = 1.10-5.63 between cases and controls. A risk haplotype (DLA-DRB1*00601/DQA1*005011/DQB1*00701 was present in 14.4% of cases and 6.5% of controls and conferred an elevated risk of developing CH with an OR of 3.13 (95% CI = 1.20-8.26. These results demonstrate that DLA class II is significantly associated with risk and protection from developing CH in ESSs.
Bahmann, Klaus; Gemmel, Peter; Lex, Angelika; Bauer, Bruno
2010-01-01
In the past years electronic books were booming at scientific libraries. E-books have established especially at medical libraries as an important part of the document supply in particular for students. The current interview with Klaus Bahmann (Springer), Peter Gemmel (Thieme) and Angelika Lex (Elsevier) informs about development, situation and outlook of e-books of three big scientific publishers. They spoke about the focal points in the supply and the diverse business models and the diff...
龙旭梅; 祝业; 马明慧
2013-01-01
从单篇文献下载成本、月全文下载量、高下载量期刊等方面统计分析了ScienceDirect OnLine,SpringerLINK,Wiley Interscience等3种全文电子期刊数据库的使用情况,评估了电子期刊资源建设.
SpringerLink 和 ProQuest 外文数据库的检索和利用--以河南科技学院图书馆电子资源为例
赵海红; 王晓静
2013-01-01
以河南科技学院图书馆电子资源为例，介绍了SpringerLink和ProQuest两个外文数据库的功能特点及检索方法，目的在于帮助和引导用户准确、高效地搜索到需要的文献，提高数据库的利用率。
V Umamaheswari; C Kannan; Banumathi Arabindoo; M Palanichamy; V Murugesan
2000-08-01
Isomorphously substituted molecular sieves, MAPO-31, NAPO-31 and ZAPO-31, were prepared under mild hydrothermal conditions from gels containing sources of aluminium, phosphorus, appropriate metal and dipropylamine (DPA), presumably acting as a structure-directing template. They were characterized by XRD, FTIR, TGA, inductively coupled plasma (ICP), ESR, Brunauer, Emmett, Teller (BET) and diffusion reflectance spectroscopy (DRS) techniques. In the XRD, the peak at 2 = 16 7° of the metal substituted AlPO-31 is more intense than that of pure AlPO-31 suggesting preferential occupation of the plane corresponding to it as compared to other planes. The O-H stretch in the IR spectra of the metal-substituted molecular sieves is blue-shifted with respect to the parent AlPO-31 molecular sieves possibly due to metal substitution. The g values obtained from the ESR spectra of MAPO-31 and NAPO-31 also substantiate framework substitution. Ethylation of toluene was carried out between 300 and 450°C over the above catalysts as a model test reaction. The high toluene conversion over metal-substituted molecular sieves proves the isomorphic substitution of metal ions in the AlPO-31 framework.
Hierarchical Spectral Analysis Isomorphism Testing Algorithm for Undirected Graph%无向图的层次化谱分析同构判定算法
谢敏; 杨帆; 曾璇
2015-01-01
In this paper, a hierarchical isomorphism testing algorithm based on spectral analysis is proposed for undirected graphs. The proposed algorithm firstly checks the vertices number, edge number and degree sequence of the two graphs. Afterwards, a hierarchical spectral algorithm is employed to further test the isomorphism of the graphs. The proposed algorithm can achieve higher efficiency for graphs of regular grid or fixed degrees compared with the state-of-the-art Nauty algorithm.%针对无向图同构的判定问题, 一种层次化的基于谱分析的同构判定算法. 比较两图的顶点数、边数以及度数序列对图进行预同构判定; 然后对具有唯一 Fiedler 向量的图通过层次化的谱分析算法进行再次同构判定. 与最具代表性的同构判定算法 Nauty 相比, 随着判定图的规模增大, 该算法对于规则网格图和固定度数图具有更高的同构判定效率.
Vaddypally Shivaiah; Tanmay Chatterjee; Samar K Das
2014-09-01
One-dimensional isomorphous inorganic polymers containing Anderson type heteropoly anion as a basic building unit, namely [La(H2O)7Cr(OH)6Mo6O18]·4nH2O (1), [Gd(H2O)7Cr(OH)6Mo6O18]·4nH2O (2), [Gd(H2O)7Al(OH)6Mo6O18]·4nH2O (3), and [Eu(H2O)7Al(OH)6Mo6O18]·4nH2O (4) have been synthesized and studied by the powdered X-ray diffraction, TGA, IR, electronic and ESR spectroscopy, and unambiguously by single crystal X-ray crystallography. Isomorphous compounds 1-4 are crystallized in orthorhombic system with 21 space group. The crystal structure analysis reveals a one-dimensional extended chain in which the Anderson type heteropolyanion, acting as the building unit, is linked by rare earth metal ions in a zig-zag fashion. In the crystal structure, all types of oxygens of the heteropolyanion, lattice waters, lanthanum coordinated waters are extensively involved in O—H…O hydrogen bonding interactions. Compounds are additionally characterized by UV-visible and ESR spectroscopy.
Lex, Angelika; Gemmel, Peter; Bahmann, Klaus; Bauer, Bruno
2010-01-01
In the past years electronic books were booming at scientific libraries. E-books have established especially at medical libraries as an important part of the document supply in particular for students.The current interview with Klaus Bahmann (Springer), Peter Gemmel (Thieme) and Angelika Lex (Elsevier) informs about development, situation and outlook of e-books of three big scientific publishers. They spoke about the focal points in the supply and the diverse business models and the different...
Soft Congruence Relations over Rings
Xiaolong Xin
2014-01-01
Full Text Available Molodtsov introduced the concept of soft sets, which can be seen as a new mathematical tool for dealing with uncertainty. In this paper, we initiate the study of soft congruence relations by using the soft set theory. The notions of soft quotient rings, generalized soft ideals and generalized soft quotient rings, are introduced, and several related properties are investigated. Also, we obtain a one-to-one correspondence between soft congruence relations and idealistic soft rings and a one-to-one correspondence between soft congruence relations and soft ideals. In particular, the first, second, and third soft isomorphism theorems are established, respectively.
Soft congruence relations over rings.
Xin, Xiaolong; Li, Wenting
2014-01-01
Molodtsov introduced the concept of soft sets, which can be seen as a new mathematical tool for dealing with uncertainty. In this paper, we initiate the study of soft congruence relations by using the soft set theory. The notions of soft quotient rings, generalized soft ideals and generalized soft quotient rings, are introduced, and several related properties are investigated. Also, we obtain a one-to-one correspondence between soft congruence relations and idealistic soft rings and a one-to-one correspondence between soft congruence relations and soft ideals. In particular, the first, second, and third soft isomorphism theorems are established, respectively.
Liu, Jian
2017-01-01
We introduce the isomorphism between an multi-state Hamiltonian and the second-quantized many-electron Hamiltonian (with only 1-electron interactions). This suggests that all methods developed for the former can be employed for the latter, and vice versa. The resonant level (Landauer) model for nonequilibrium quantum transport is used as a proof-of-concept example. Such as the classical mapping models for the multi-state Hamiltonian proposed in our previous work [J. Liu, J. Chem. Phys. 145, 204105 (2016)] lead to exact results for this model problem. We further demonstrate how these methods can also be applied to the second-quantized many-electron Hamiltonian even when 2-electron interactions are included.
Liu, Jian
2016-01-01
We introduce the isomorphism between the multi-state Hamiltonian and the second-quantized many-electron Hamiltonian (with only 1-electron interactions). This suggests that all methods developed for the former can be employed for the latter, and vice versa. The resonant level (Landauer) model for nonequilibrium quantum transport is used as a proof-of-concept example. Such as the classical mapping models for the multi-state Hamiltonian proposed in our previous work [J. Chem. Phys. (submitted)] lead to exact results for this model problem. We further demonstrate how these methods can also be applied to the second-quantized many-electron Hamiltonian even when 2-electron interactions are included.
Bruce, Iain P; Karaman, M Muge; Rowe, Daniel B
2012-10-01
The acquisition of sub-sampled data from an array of receiver coils has become a common means of reducing data acquisition time in MRI. Of the various techniques used in parallel MRI, SENSitivity Encoding (SENSE) is one of the most common, making use of a complex-valued weighted least squares estimation to unfold the aliased images. It was recently shown in Bruce et al. [Magn. Reson. Imag. 29(2011):1267-1287] that when the SENSE model is represented in terms of a real-valued isomorphism,it assumes a skew-symmetric covariance between receiver coils, as well as an identity covariance structure between voxels. In this manuscript, we show that not only is the skew-symmetric coil covariance unlike that of real data, but the estimated covariance structure between voxels over a time series of experimental data is not an identity matrix. As such, a new model, entitled SENSE-ITIVE, is described with both revised coil and voxel covariance structures. Both the SENSE and SENSE-ITIVE models are represented in terms of real-valued isomorphisms, allowing for a statistical analysis of reconstructed voxel means, variances, and correlations resulting from the use of different coil and voxel covariance structures used in the reconstruction processes to be conducted. It is shown through both theoretical and experimental illustrations that the miss-specification of the coil and voxel covariance structures in the SENSE model results in a lower standard deviation in each voxel of the reconstructed images, and thus an artificial increase in SNR, compared to the standard deviation and SNR of the SENSE-ITIVE model where both the coil and voxel covariances are appropriately accounted for. It is also shown that there are differences in the correlations induced by the reconstruction operations of both models, and consequently there are differences in the correlations estimated throughout the course of reconstructed time series. These differences in correlations could result in meaningful
张玲
2013-01-01
从编辑功能、校对出版流程及数字化盈利模式等3方面,对中华医学会信息管理平台及Springer Link学术期刊数字化平台进行了比较,以期发现我国科技期刊数字化转型进程中存在的不足与问题,为进一步加快转型提供参考.
Lex, Angelika
2010-05-01
Full Text Available In the past years electronic books were booming at scientific libraries. E-books have established especially at medical libraries as an important part of the document supply in particular for students.The current interview with Klaus Bahmann (Springer, Peter Gemmel (Thieme and Angelika Lex (Elsevier informs about development, situation and outlook of e-books of three big scientific publishers. They spoke about the focal points in the supply and the diverse business models and the different estimation for the future development of electronic books.
Mikhailov, M. A., E-mail: mikmik@igc.irk.ru [Russian Academy of Sciences, Institute of Geochemistry, Siberian Branch (Russian Federation); Rozhdestvenskaya, I. V.; Bannova, I. I. [St. Petersburg State University (Russian Federation)
2011-11-15
An X-ray diffraction study of isostructural V-containing beryl (V-Iz) and V-containing beryllian indialite (V-BI) (the general formula M{sub 2}{sup VI}T2{sub 3}{sup IV}T1{sub 6}{sup IV}O{sub 18}){sup 1} synthesized in the Al{sub 2}Be{sub 3}Si{sub 6}O{sub 18}-Mg,Ca/F,Cl flux system with V{sub 2}O{sub 5} impurity has been performed. It is shown for V-Iz that the isomorphic replacement of some part of Al{sup 3+} in the octahedron with larger V{sup 3+} and Mg{sup 2+} cations and a small fraction of Be{sup 2+} ions with Al{sup 3+} in the interring tetrahedron T2, as well as the introduction of alkaline ions into R voids, leads to an increase in the average bonds lengths in the M position and increases the unit-cell parameter a at an insignificant increase in the parameter c. In V-Bi, the heterovalent replacement of some part of Mg{sup 2+} ions by V{sup 3+} ions, with complex isomorphism in all structural positions, is accompanied by the isovalent Mg{sup 2+} {yields} Fe{sup 2+} scheme. These substitutions cause some decrease in the parameter c of V-Bi with the preservation of its parameter a. It is found that T1 tetrahedra in V-BI are much closer to ideal than in V-Iz, T2 tetrahedra are distorted much more weakly, and M octahedra are distorted somewhat more strongly. However, the degree of distortion of the ring tetrahedron T1 in V-BI reaches 0.9 rel. %. This fact indicates that V-BI and Cr-BI have a similar disposition to congruent melting, which significantly inferior that of 'pure' species.
Sasai, Kenzo; Kofu, Maiko; Yamaura, Jun-ichi; Hiroi, Zenji; Yamamuro, Osamu [Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581 (Japan); Ibberson, Richard M [ISIS Facility, STFC-Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX (United Kingdom); Hirota, Kazuma, E-mail: yamamuro@issp.u-tokyo.ac.j [Department of Earth and Space Science, Faculty of Science, Osaka University, Toyonaka, Osaka 560-0043 (Japan)
2010-01-13
We have carried out adiabatic calorimetric and neutron powder diffraction experiments on the beta-pyrochlore oxide KOs{sub 2}O{sub 6}, which has a superconducting transition at T{sub c} = 9.6 K and another novel transition at T{sub p} = 7.6 K. A characteristic feature of this compound is that the K ions exhibit rattling vibrations in the cages formed by O atoms even at very low temperatures. The temperature and entropy of the T{sub p} transition is in good agreement with previous data measured using a heat relaxation method, indicating that the present sample is of high purity and the transition entropy, 0.296 J K{sup -1} mol{sup -1}, does not depend on the calorimetric method used. The neutron powder diffraction data show no peak splitting nor extra peaks over the temperature range between 2 and 295 K, suggesting that the T{sub p} transition is a rather unusual isomorphic transition. Rietveld analysis revealed an anomalous expansion of the lattice and a deformation of the O atom cage below 7.6 K. In the low-temperature phase, the distribution of scattering density corresponding to the K ions becomes broader whilst maintaining its maximum at the cage center. Based on these findings, we suggest that the T{sub p} transition is due to the expansion of the cage volume and cooperative condensation of the K ions into the ground state of the rattling motion.
Sasai, Kenzo; Kofu, Maiko; Ibberson, Richard M; Hirota, Kazuma; Yamaura, Jun-ichi; Hiroi, Zenji; Yamamuro, Osamu
2010-01-13
We have carried out adiabatic calorimetric and neutron powder diffraction experiments on the β-pyrochlore oxide KOs(2)O(6), which has a superconducting transition at T(c) = 9.6 K and another novel transition at T(p) = 7.6 K. A characteristic feature of this compound is that the K ions exhibit rattling vibrations in the cages formed by O atoms even at very low temperatures. The temperature and entropy of the T(p) transition is in good agreement with previous data measured using a heat relaxation method, indicating that the present sample is of high purity and the transition entropy, 0.296 J K(-1) mol(-1), does not depend on the calorimetric method used. The neutron powder diffraction data show no peak splitting nor extra peaks over the temperature range between 2 and 295 K, suggesting that the T(p) transition is a rather unusual isomorphic transition. Rietveld analysis revealed an anomalous expansion of the lattice and a deformation of the O atom cage below 7.6 K. In the low-temperature phase, the distribution of scattering density corresponding to the K ions becomes broader whilst maintaining its maximum at the cage center. Based on these findings, we suggest that the T(p) transition is due to the expansion of the cage volume and cooperative condensation of the K ions into the ground state of the rattling motion.
Li, Xue-Fei; Wang, Xiao; Lun, Hui-Jie; Jin, Lin-Yu; Li, Ya-Min; Yang, Jing-He
2017-02-01
The compounds [Co(e,a-cis-1,4-chdc)(phdat)]n (1) and [Cd(e,a-cis-1,4-chdc)(phdat)]n (2) have been synthesized under hydrothermal method by using 1,4-cyclohexanedicarboxylic acid (1,4-H2chdc), 2,4-diamino-6-phenyl-1,3,5-triazine (phdat) as well as CoCl2·6H2O, CdCl2·2.5H2O respectively and characterized by IR spectra, X-ray single-crystal diffraction, powder X-ray single-crystal diffraction (PXRD), elemental analyses and thermogravimetric analyses (TGA). The results show the compounds 1 and 2 are isomorphous and exhibit paddle-wheel dinuclear Co2(CO2)4/Cd2(CO2)4 units, which are further connected to 1D chain structures by μ4:η1:η1:η1:η1 1,4-chdc2- ligands and extended into a 3D structures via different hydrogen bonding and π…π stacking interactions. Furthermore, compound 1 exhibits antiferromagnetic behavior and compound 2 displays luminescent behavior at solid state.
论多恩诗歌中的“灵”意象%Three Patterns of “Soul” Image in Donne's Love Isomorphism
熊毅; 贾琳
2015-01-01
John Donne is the leader of the English metaphysical poets , his works include plentiful images . Among these images ,“soul” image is rather peculiar . From the perspective of heterogeneous isomorphism , the essential theory of Gestalt psychological aesthetics , this thesis aims at giving an interpretation of the multiple expression patterns of “soul” image in Donne's poem , and studying the substance of Donne's love .%约翰·多恩（John Donne ，1572～1631），是英国玄学派诗歌的领军人物，他的诗歌意象丰富，其中“灵”意象颇为奇特。本篇论文基于格式塔心理美学的核心理论———“异质同构”，阐释多恩诗歌中“灵”意象的多重表现样式，探讨该意象描述下多恩爱情的实质所在。
Anitha, R; Athimoolam, S; Gunasekaran, M
2015-03-05
A needle shaped transparent light brown crystals of 2-nitroanilinium bromide were successfully synthesized and crystallized from an aqueous mixture by slow evaporation technique. Single crystal XRD studies confirm the crystalline phase of this isomorphous compound which contains a positively charge 2-nitroanilinium cation and a negatively charged bromide anion. The solid phase FT-IR and FT-Raman spectra of the compound have been recorded in the range of 4000-400cm(-1). The observed modes are correlated by the factor group theory analysis and different IR and Raman active species were identified. Geometrical optimisations were carried out and harmonic vibrational wave numbers were computed for the minimum energy molecular structure at RHF level invoking 6-311++G(d,p) and SDD basis sets. Optimised molecular geometry was compared with the crystallographic data. The calculated wavenumbers were compared with the experimental values. The NH vibrational bands are shifted from its normal range and the shifting is associated with the influence of the intermolecular hydrogen bonds in the crystal. A strong intensity peak in theoretical and corresponding band in experimental confirms the presence of NH…Br interaction as predicted in crystalline state.
无
2010-01-01
Cobalt catalysts supported on a series of mesoporous SBA-15 materials isomorphically substituted with zirconium (Zr/Si atomic ratio=1/20) with different pore sizes (5.7 nm,7.8 nm,11.6 nm,17.6 nm) have been synthesized.The catalysts were characterized by transmission electron microscopy,29 Si solid state magic angle spinning (MAS)NMR,N2 adsorption-desorption measurements,X-ray powder diffraction,X-ray photoelectron spectroscopy,H2-temperature programmed reduction,H2-temperature programmed desorption and O2 titrations.The results indicated that larger pore size led to weaker interactions between cobalt and the supports which lowered the temperature of both reduction steps (Co3O4 → CoO and CoO→ Co0).The catalytic performances of the catalysts in Fischer-Tropsch synthesis (FTS) were tested in a fixed bed reactor.It was found that the FTS catalytic activity and product selectivity depended strongly on the pore size of the catalysts.The catalyst with a pore size of 7.8 nm showed the best FTS activity,and the catalyst with a pore size of 17.6 nm showed the highest selectivity to C12-C20 and C20+ hydrocarbons.
Bignell, D E; Jones, D T
2014-01-01
Biology of Termites: A Modern Synthesis (Bignell DE, Roisin Y, Lo N, (Editors), Springer, Dordrecht, 576pp, ISBN 978-90-481-3976-7, e-ISBN 978-90-481-3977-4, DOI 10.1007/978-90-481-3977-4) was published in 2011. With the agreement of the publishers, we give a taxonomic index of the book comprising 494 termite entries, 103 entries of other multicellular animal species mentioned as associates or predators of termites, with 9 fungal, 60 protist, and 64 prokaryote identities, which are listed as termite symbionts (sensu stricto). In addition, we add descriptive authorities for living (and some fossil) termite genera and species. Higher taxonomic groupings for termites are indicated by 25 code numbers. Microorganisms (prokaryotes, protists, and fungi) are listed separately, using broad modern taxonomic affiliations from the contemporary literature of bacteriology, protozoology, and mycology.
Cohen, Andrew G; Glashow, Sheldon L
2006-07-14
By very special relativity (VSR) we mean descriptions of nature whose space-time symmetries are certain proper subgroups of the Poincaré group. These subgroups contain space-time translations together with at least a two-parameter subgroup of the Lorentz group isomorphic to that generated by K(x) + J(y) and K(y)- J(x). We find that VSR implies special relativity (SR) in the context of local quantum field theory or of conservation. Absent both of these added hypotheses, VSR provides a simulacrum of SR for which most of the consequences of Lorentz invariance remain wholly or essentially intact, and for which many sensitive searches for departures from Lorentz invariance must fail. Several feasible experiments are discussed for which Lorentz-violating effects in VSR may be detectable.
对称算子空间上的Jordan环同构%Jordan Ring Isomorphism on the Space of Symmetric Operators
安润玲; 侯晋川
2012-01-01
设H为无限维的复Hilbert空间,J（H）是H上全体对称算子构成的Jordan代数,Φ：J（H）→J（H）为双射且Φ（I）=I.证明下列条件等价：（1）Φ（ABA）=Φ（A）Φ（B）Φ（A）,A,B∈J（H）;（2）Φ（1/2（AB＋BA））=1/2Φ（A）Φ（B）＋1/2Φ（B）Φ（A）,A,B∈J（H）;（3）Φ（ABC＋CBA）=Φ（A）Φ（B）Φ（C）＋Φ（C）Φ（B）Φ（A）,A,B,C∈J（H）;（4）Φ（1/2（ABC＋CBA））=1/2Φ（A）Φ（B）Φ（C）＋1/2Φ（C）Φ（B）Φ（A）,A,B,C∈J（H）;（5）Φ是J（H）上的Jordan环同构;（6）存在有界可逆的线性或共轭线性算子A：H→H,A~t=A~（-1）,使得Φ（X）=AXA~t,X∈J（H）.得到了J（H）上Jordan环同构的新刻画.%Let H be an infinite dimensional complex Hilbert space and I(H) bethe Jordan algebra of all symmetric operators in B(H).We show that if bijectivemapsΦ:I(H)→I(H) withΦ(I) = I,then the following conditions are equivalent:(1)Φ(ABA) =Φ(A)Φ(B)Φ(A),A,B∈I(H);(2)Φ((1/2)(AB + BA)) =(1/2)Φ(A)Φ(B) +(1/2)(B)Φ(A),A,B∈I(H);(3)Φ(ABC + CBA) =Φ(A)Φ(B)Φ(C) +Φ(C)Φ(B)Φ(A),A,B,C∈I(H);(4)Φ((1/2)(ABC + CBA)) =(1/2)Φ(A)Φ(B)Φ(C) +(1/2)Φ(C)Φ(B)Φ(A),A,B,C∈I(H);(5)Φis a Jordan ring isomorphism on I(H);(6) there exists a bounded invertible linear or conjugate linear operator A:H→Hwith A~t = A~(-1) such thatΦ(X) = AX A~t for every X∈I(H).New characterizationsof Jordan ring isomorphism on I(H) were got.
一种同构式主从液压机械手的设计%Design of an Isomorphism Type Master-slave Hydraulic Manipulator
张丽
2015-01-01
提出一种同构式主从液压机械手, 应用直线型光栅作为主手位置的检测装置、 应用步进式电动推杆驱动从手,设计了新型液压传动装置并用此液压装置传递动力, 主手的直线型光栅发出的脉冲经硬件电路处理后, 直接作为步进式电动推杆的驱动与控制脉冲, 步进式电动推杆经液压传动装置把运动传递给机械手的从手, 从手可完全、 实时重复主手的动作.%An isomorphism type master-slave hydraulic manipulator was presented. Applying linear grating as the main hand posi-tion detecting device, applying stepping type electric push rod to drive the slave hand, a new type of hydraulic transmission was designed and the hydraulic device was used to transfer power. The pulses generated by master hand linear grating were processed by the hardware circuit, then they were directly as the control pulses of the stepping electric push rod. Through hydraulic transmission device, the stepping electric push rod transferred the motion to the slave hand, so the slave hand could completely repeat the movements of the main hand real-time.
张谋贵
2012-01-01
Although the degree has not deteriorated,Wanjiang demonstration area has a certain degree of convergence in industrial structure from the analysis with the industrial structure similarity coefficient and the advantages industry analogue method,which is a normal phenomenon in the process of regional development.At present,the excessive competition for attracting investment in the process of industry transferring in Wan-jiang demonstration area is not caused by industry isomorphism,but caused by government industry policy.Promoting the harmonious development of Wan-jiang demonstration area needs to develop and implement good regional planning,enlarge superior industry,extend industrial chain,change government function,and reduce government intervening in microeconomics.%通过产业结构相似系数和优势产业相似法分析发现皖江示范区有一定程度的产业结构趋同现象,但没有达到严重的程度,是区域发展过程的一种正常现象。当前皖江示范区承接产业转移过程的所表现出来招商引资过度竞争,并非是产业同构所引起的,而是政府行为所致。促进皖江示范区产业协调发展要制定好和落实好区域规划;做大优势产业,延伸产业链;转变政府职能,减少政府干预微观经济行为。
Brewster, Hilary D
2009-01-01
The theory of relativity has become a cornerstone of modern physics. Over the course of time it has been scrutinized in a multitude of experiments and has always been verified with high accuracy. The correctness of this theory can no longer be called into question. Right after its discovery by Albert Einstein in 1905, special relativity was only gradually accepted because it made numerous predictions contradicting common sense, fervently castigated by Einstein, and also defied experiment for too long a time. It was only with the advent of particle or high energy physics that matter could be ac
Einstein, Albert
2013-01-01
Time magazine's ""Man of the Century"", Albert Einstein is the founder of modern physics and his theory of relativity is the most important scientific idea of the modern era. In this short book, Einstein explains, using the minimum of mathematical terms, the basic ideas and principles of the theory that has shaped the world we live in today. Unsurpassed by any subsequent books on relativity, this remains the most popular and useful exposition of Einstein's immense contribution to human knowledge.With a new foreword by Derek Raine.
Relational Learning via Collective Matrix Factorization
2008-06-01
random variables. J. Multi. Anal ., 11(4):581– 598, 1981. [3] D. J. Aldous. Exchangeability and related topics, chapter 1. Springer, 1985. 14 [4] K. S...administration of its programs or activities on the basis of race, color, national origin, sex or handicap in violation of Title VI of the Civil Rights...pursue," excludes openly gay , lesbian and bisexual students from receiving ROTC scholarships or serving in the military. Nevertheless, all ROTC classes at
Kragh-Müller, Grethe
2010-01-01
artiklen omhandler "rummet som den tredje pædagog". Her beskrives, hvordan man i det pædagogiske arbejde i Reggio Emilia i Italien lægger vægt på indrette gode læringsmiljøer for børn. Der er en beskrivelse af, hvordan læring tænkes og tilrettelægges ud fra et konstruktivistisk grundlag, hvor der...
史晓影
2012-01-01
The topological isomorphism is an important factor that affects the mechanism synthesis and optimiza-tion. Based on the matrix determination method the pole pair mechanism combining with the characteristic of the dis-crete topology, a new method of the topology microfilm transform to solve the problem of topological isomorphism is pro-posed. Finally, the detailed determine methods are given by the example from, and the automated decision by the computer is achieved.The examples show that this new method is precise, simple, effective and easy to implement by computer. The new method has the advantages of automatic topographical synthesis and isomorphism identification by computer, thus the topology inversion can be automated, intelligent, networked and visualization in the future.%拓扑同构问题是机构的结构类型综合及优选的重要影响因素,根据杆副机构采用的矩阵判定方法并结合离散型拓扑模型的特点,提出了用拓扑缩微变换解决拓扑同构判定的新方法,最后以算例的形式给出了此方法的具体判定过程,并实现了计算机自动判定.实例证明该方法准确、简单、高效且能在计算机上实现.新算法的优点是便于计算机的拓扑自动综合和同构识别,从而为拓扑反演的自动化、智能化、网络化和可视化创造了条件.
Shielding Idiosyncrasy from Isomorphic Pressures
Alvarez, José Luis; Mazza, Carmelo; Strandgaard Pedersen, Jesper;
2003-01-01
with legitimacyin the field. Our theory of creative actionfor optimal distinctiveness suggests thatfilm directors increase their control bypersonally consolidating artistic andproduction roles, by forming closepartnership with committed producer, andby establishing own production company.Ironically, to escape...
Optimization of inhibitory decision rules relative to length and coverage
Alsolami, Fawaz
2012-01-01
The paper is devoted to the study of algorithms for optimization of inhibitory rules relative to the length and coverage. In contrast with usual rules that have on the right-hand side a relation "attribute ≠ value", inhibitory rules have a relation "attribute = value" on the right-hand side. The considered algorithms are based on extensions of dynamic programming. © 2012 Springer-Verlag.
2011-10-19
... join the conference, submit inquiries to Ms. Yvette Springer at Yvette.Springer@bis.doc.gov no later... suggests that presenters forward the public presentation materials to Yvette Springer. For more information contact Ms. Springer on (202) 482-2813. Dated: October 13, 2011. Yvette Springer, Committee Liaison...
2013-10-23
... basis. To join the conference, submit inquiries to Ms. Yvette Springer at Yvette.Springer@bis.doc.gov no... meeting to Ms. Springer via email. For more information, call Yvette Springer at (202) 482-2813. Dated: October 18, 2013. Yvette Springer, Committee Liaison Officer. BILLING CODE P ...
2012-10-31
... basis. To join the conference, submit inquiries to Ms. Yvette Springer at Yvette.Springer@bis.doc.gov no... meeting to Ms. Springer via email. For more information, call Yvette Springer at (202) 482 2813. Dated: October 25, 2012. Yvette Springer, Committee Liaison Officer. BILLING CODE P ...
2011-08-22
... Ms. Yvette Springer at Yvette.Springer@bis.doc.gov no later than September 7, 2011. A limited number... forward the public presentation materials prior to the meeting to Ms. Springer via e-mail. The Assistant... Yvette Springer at (202) 482-2813. Dated: August 15, 2011. Yvette Springer, Committee Liaison...
Extensive expression of craniofacial related homeobox genes in canine mammary sarcomas
Wensman, H.; Goransson, H.; Leuchowius, K.J.; Stromberg, S.; Ponten, F.; Isaksson, A.; Rutteman, G.R.; Heldin, N.; Pejler, G.; Hellmen, E.
2009-01-01
Extensive expression of craniofacial related homeobox genes in canine mammary sarcomas Journal Breast Cancer Research and Treatment Publisher Springer Netherlands ISSN 0167-6806 (Print) 1573-7217 (Online) Issue Volume 118, Number 2 / November, 2009 Category Preclinical Study DOI 10.1007/s10549-008-0
Alsolami, Fawaz
2013-01-01
This paper is devoted to the study of algorithms for sequential optimization of approximate inhibitory rules relative to the length, coverage and number of misclassifications. Theses algorithms are based on extensions of dynamic programming approach. The results of experiments for decision tables from UCI Machine Learning Repository are discussed. © 2013 Springer-Verlag.
Quel mode de liaison dans les corrélatives isomorphes « plus...plus » et « autant...autant » ?
Roig Audrey
2014-07-01
Full Text Available Le débat sur l’identification du mode de liaison de prédications dans les structures corrélatives isomorphes (CI du type plus…plus et autant…autant a fait couler beaucoup d’encre ces vingt à trente dernières années. La question, semblerait-il, a aujourd’hui trouvé autant de réponses qu’il existe de solutions sensées : ainsi, si la liaison prédicationnelle est de nature subordonnante selon Riegel et alii (2004, Den Dikken (2005 et Stage (2009, elle a plus volontiers trait à la coordination pour Melis (1994, Muller (2008, Grevisse & Goosse (2011 ou Mouret (2013. Ces constructions témoigneraient plutôt de la possibilité de dissocier les composantes sémantique et syntaxique des structures langagières de l’avis d’Allaire (1982 ou Culicover & Jackendoff (1997, 1999, dans la mesure où elles se caractériseraient par la présentation d’une coordination syntaxique doublée d’une subordination sémantique. Ces trois options, contraires mais relayées chacune par une série d’arguments, conduisent notamment Abeillé & Borsley (2006 à admettre la coexistence de deux analyses en français, quand seule l’option de la liaison par subordination doit être retenue pour les CI en anglais. La complexité de trancher la question de l’identification du mode de liaison à l’œuvre dans les CI si l’on s’en tient à une typologie traditionnelle des jonctions prédicationnelles, a déjà été mise en évidence par des auteurs comme Abeillé & Borsley (2006 ou Hadermann et alii (2010, notamment. La résolution du problème de catégorisation des CI dans une appréhension plus classique des modes de liaison (subordination vs coordination reste pourtant possible, selon nous, mais elle suppose la réponse préalable, en amont, à un autre débat qui anime depuis longtemps les syntacticiens, à savoir celui de la définition du système organisant les jonctions prédicationnelles (section 2 : par exemple, qu’est-ce que la
2006-01-01
Book review of Context: Nature, Impact, and Role; 5th International Conference on Conceptions of Library and Information Science, CoLIS 2005, Glasgow 2005; Proceedings. Eds.: Fabio Crestani, Ian Ruthven. Berlin: Springer, 2005. xiii+250p., ISBN 3-540-26178-8 (pbk). This is volume 3507 of "Lecture Notes in Computer Science" (LNCS). It contains the papers of the 5th CoLIS meeting, most of them rather sophisticated, and makes an interesting reading.
Zhang, B; Du, S Z; Lu, X M; Wang, G; Fen, J
2013-08-19
Two new crystal isomorphs consisting of complexes [(CH3CH2)3NH)]2[MoO2(C14H6O4)2] (1) and [(CH3CH2)3NH)]2[WO2(C14H6O4)2] (2) have been synthesized, respectively, and from which Mo-based flexible and durable nanopipes with diameters of 16 nm and lengths of hundreds of micrometers and W-based rigid and fragile nanotubules with ununiform diameters ranging from 30 to 100 nm and lengths in tens of micrometers have been prepared separately, which revealed that the change of the metal in the coordination center of the isomorphs can result in obvious variation to their nanostructures. The crystals both exhibited multilayered structures by the piling of lamellar repeating motifs through van der Waals forces, which are formed by the parallel alignment of 1D chains through hydrogen bonds, and the 1D chains are assembled by complexes 1 and 2, respectively, through geometrical intercalation and π-π packing. However, under grinding and ultrasonication, crystal 1 disassembled uniformly into longer and narrower nanostrips, whereas crystal 2 were broken at random into shorter and wider nanoribbons; therefore, the two lamellar nanostructures curled into different cylindrical nanospecies. The differences caused by Mo and W are the following: the Mo complex prefers to assemble into more durable one-dimensional structures along Mo-O bonds than W isomorphs; since Mo-O bonds are weaker than Mo═O and W-O bonds, then the weakest Mo-O bonds can be supported by the adjacent molecules through intercalation and π-π packing, which resulted in that the linkages among the Mo complexes are stronger along the Mo-O direction and hence the longer Mo-based cylindrical structure. Moreover, the flexibility of Mo-based nanopipes and the rigidity of W-based nanotubules might be attributed to that Mo possesses a lower melting point than W; therefore, Mo is softer and W is harsher.
A Geographical Extension to the Relational Datamodel
1989-08-14
relational algebra . In CG, International Workshop on Computational Geometry, pages 85-89, March 1988. [ChFu8O] N.S. Chang and K.S. Fu. A Relational...Number 337 in Lecture Notes in Computer Science. Springer-Verlag, Berlin, 1988. [Giati88] R.H. G(iting. Geo-relational algebra : A model and query...index structure for spatial searching. ACM SIGMOD, 13:47-57, 1984. [JoCa88] Thomas Joseph and Alfonso F. Cardenas . PICQUERY: A high level query
吴为善
2012-01-01
Based on the theory of construction grammar,this paper has proved and explained the phenomenon that the three patterns with different meanings of the construction ＂NPpatient＋VPt＋QM＂ in modern Chinese are isomorphic in nature,i.e.the entity metering（Pattern A）,the event metering（Pattern B） and the time interval metering（Pattern C） share the same constructional motivation.In the construction,the function of individualization of the entity,event or time into units of measurement is realized by different measure words,and that of specification of the quantum state is accomplished by numerals.On the basis of the above analyses,the paper focuses on discussing the syntactic explanation of this isomorphism of this construction and revealing its identity of discourse function.%本文立足认知功能语法观,指出现代汉语＂NP受＋VPt＋QM＂所包含的三类句式虽然在语义上有差异,但具有同构性,并对此进行了论证和解释。本文认为实体计量（A式）、事件计量（B式）、时段计量（C式）具有共同的构式理据,不同类型的量词实现了同一个功能,即将实体、事件、时间＂个体化＂以成为计量单位,并以数词完成对量化状态的描述。在此基础上本文集中讨论了这种同构性的句法解释,并揭示了该构式话语功能的同一性。
邱紫华
2015-01-01
Gilles Deleuze created the concept of "rhizome"to describe the pluralistic mode thinking in post-modern philosophy.The thought pattern of "rhizome"possesses the function of pluralistic and heterogeneous connection.It is an open, free and pluralistic generating structure.This mode of thinking shows both original perspectives and unique logic .This paper reveals the "family resemblance"or "heterogeneous isomorphism"between "rhizome"and Zen through.The comparison between their mode of thinking indirectly proves that certain "isomorphism"between Western philosophy and Oriental Zen has taken shape through their mutual influence since the 20th century.%德勒兹创造了“根茎”概念来表达他心目中的后现代主义哲学多元化的思维模式。“根茎”思维模式具有多元化的异质连接功能，是一个开放的、自由的、多元化的生成结构，这种思维模式具有独创性的视角和独特的逻辑。文章通过“根茎”同禅宗思维特点的比较，揭示了两者之间具有“家族相似性”或者说“异质同构性”，间接地证明了20世纪以来，西方哲学同东方禅学之间相互影响而形成的某些“同构性”。
Sequential optimization of matrix chain multiplication relative to different cost functions
Chikalov, Igor
2011-01-01
In this paper, we present a methodology to optimize matrix chain multiplication sequentially relative to different cost functions such as total number of scalar multiplications, communication overhead in a multiprocessor environment, etc. For n matrices our optimization procedure requires O(n 3) arithmetic operations per one cost function. This work is done in the framework of a dynamic programming extension that allows sequential optimization relative to different criteria. © 2011 Springer-Verlag Berlin Heidelberg.
2013-08-27
... Ms. Yvette Springer at Yvette.Springer@bis.doc.gov no later than September 4, 2013. A limited number... forward the public presentation materials prior to the meeting to Ms. Springer via email. The Assistant... portions of the meeting will be open to the public. For more information, call Yvette Springer at (202)...
2013-04-24
... Ms. Yvette Springer at ] Yvette.Springer@bis.doc.gov no later than May 1, 2013. A limited number of... public presentation materials prior to the meeting to Ms. Springer via email. The Assistant Secretary for... open to the public. For more information, call Yvette Springer at (202) 482-2813. Dated: April 18,...
2012-04-23
... Ms. Yvette Springer at Yvette.Springer@bis.doc.gov no later than May 3, 2012. A limited number of... public presentation materials prior to the meeting to Ms. Springer via email. The Assistant Secretary for... open to the public. For more information, call Yvette Springer at (202) 482 2813. Dated: April 14,...
2012-02-15
.... Yvette Springer at Yvette.Springer@bis.doc.gov no later than February 23, 2012. A limited number of seats... public presentation materials prior to the meeting to Ms. Springer via email. The Assistant Secretary for... the public. For more information, call Yvette Springer at (202) 482 2813. Dated: February 9, 2012...
2010-08-20
... first come, first serve basis. To join the conference, submit inquiries to Ms. Yvette Springer at... materials prior to the meeting to Ms. Springer via e-mail. The Assistant Secretary for Administration, with... Yvette Springer at (202) 482-2813. Dated: August 16, 2010. Yvette Springer, Committee Liaison Officer...
孙玉伟; 严新平; 袁成清; 汤旭晶; 徐立
2013-01-01
技术进步极大地促进着技术体系的不断发展和完善,智能电网技术以其所具备自愈、兼容和集成等技术优势和潜力在构建面向未来的船舶电网过程中将起到决定性的主导作用.首先针对船舶综合电力系统和智能电网进行简要论述；以两者在技术本质上的一致性和相似性为出发点进行同构分析,并解析船舶电网智能化即“船舶智能电网”的技术内涵；最后,从理论模型、技术组成、关键技术和“绿色”评价体系四个方面构建并完善船舶智能电网理论体系.%The technical progress greatly promotes the persistent development of the technological system. Smart Grid (SG), which emphasizes the typical characteristics of self-healing, compatibility and integration, is being regarded as the primary factor on the establishment of advanced ship power system facing to the future. The technology systems of Integrated Power System (IPS) and SG are firstly and briefly introduced. Then, the considerable consistency is set as the foundation for the isomorphism analysis that aims at the intellectualization of ship power system, also named Ship Smart Grid (SSG). Finally, the theoretical system of SSG is discussed and consummated from four aspects such as theoretical model, technical composition, key technology and "Green" evaluation system.
Andreea-Oana IACOBUŢĂ
2011-12-01
Full Text Available Each enlargement of the EU was a step forward to Central and Eastern Europe, so that the enlargements in 2004 and 2007 led to significant changes in the geopolitical context and to an increased role of the EU at a regional level and worldwide. At the same time the new realities have changed the research focus from the process of EU integration of Central and Eastern European Countries (CEE to the relationship between EU and its Eastern neighbors.The book EU Eastern Neighborhood. Economic Potential and Future Development is a collective work, resulting from the joint efforts of a group of researchers under the research project on “EU Eastern Neighborhood: Economic Potential and Future Development (ENEPO”, funded by the EU Sixth Framework Program.As stated by the two editors in the Preface, the paper follows the research objectives of the above mentioned research project. With a clearly stated intention to fill an existing gap in the literature coming from the fact that few studies “have investigated the adoption of European economic, legal and political institutions by CIS countries, the appropriateness of these institutions to CIS development needs, and their potential to speed up the transition and modernization process in this region” (p. vi, the present book provides useful insights into several pressing and challenging issues related to the economic, social and institutional development of CIS and the relations between this region and the EU.
Huang, Qiu Ying; Zhao, Yang; Meng, Xiang Ru
2017-08-01
Careful choice of the organic ligands is one of the most important parameters in the rational design and synthesis of coordination polymers. Aromatic polycarboxylates have been widely used in the preparation of metal-organic polymers since they can utilize various coordination modes to form diverse structures and can act as hydrogen-bond acceptors and donors in the assembly of supramolecular structures. Nitrogen-heterocyclic organic compounds have also been used extensively as ligands for the construction of polymers with interesting structures. In the polymers catena-poly[[[diaquabis{2-[(1H-imidazol-1-yl)methyl]-6-methyl-1H-benzimidazole-κN(3)}cobalt(II)]-μ2-benzene-1,4-dicarboxylato-κ(2)O(1):O(4)] dihydrate], {[Co(C8H4O4)(C12H11N4)2(H2O)2]·2H2O}n, (I), and catena-poly[[[diaquabis{2-[(1H-imidazol-1-yl)methyl]-6-methyl-1H-benzimidazole-κN(3)}nickel(II)]-μ2-benzene-1,4-dicarboxylato-κ(2)O(1):O(4)] dihydrate], {[Ni(C8H4O4)(C12H11N4)2(H2O)2]·2H2O}n, (II), the Co(II) or Ni(II) ion lies on an inversion centre and exhibits a slightly distorted octahedral coordination geometry, coordinated by two N atoms from two imidazole rings and four O atoms from two monodentate carboxylate groups and two water molecules. The dicarboxylate ligands bridge metal ions forming a polymeric chain. The 2-[(1H-imidazol-1-yl)methyl]-6-methyl-1H-benzimidazole ligands coordinate to the Co(II) or Ni(II) centres in monodentate modes through an imidazole N atom and are pendant on opposite sides of the main chain. The two structures are isomorphous. In the crystal, the one-dimensional chains are further connected through O-H...O, O-H...N and N-H...O hydrogen bonds, leading to a three-dimensional supramolecular architecture. In addition, the IR spectroscopic properties, PXRD patterns, thermogravimetric behaviours and fluorescence properties of both polymers have been investigated.
Lattice isomorphisms of bisimple monogenic orthodox semigroups
Goberstein, Simon M
2011-01-01
Using the classification and description of the structure of bisimple monogenic orthodox semigroups obtained in \\cite{key10}, we prove that every bisimple orthodox semigroup generated by a pair of mutually inverse elements of infinite order is strongly determined by the lattice of its subsemigroups in the class of all semigroups. This theorem substantially extends an earlier result of \\cite{key25} stating that the bicyclic semigroup is strongly lattice determined.
曾纯
2003-01-01
@@ 随着互联网在我国的飞速发展和普及,网上的电子期刊及全文数据库得到了广泛的使用.虽然这类网上的服务大部分是有偿服务,但它的投入相对于订购印刷版期刊要便宜很多,特别是与原版的外文科技期刊比较而言其价格优势则更加明显.
王琦; 吴雅静; 王军; 林晓
2012-01-01
An organotemplate-free hydrothermal route was investigated for synthesizing isomorphously Co-substituted mordenite molecular sieve using only the inorganic raw materials such as sodium silicate,aluminum sulfate,cobalt nitrate,and sodium hydroxide.Textural properties and Co ion states for the obtained solid products were characterized by powder X-ray diffraction (XRD),scanning electron microscope (SEM),inductively coupled plasma (ICP),nitrogen adsorption,ultraviolet-visible (UV-Vis)spectra,and thermogravimetric (TG) analysis.The results showed that Co ions were incorporated into the framework structure of the mordenite without the presence of extra-framework Co species.Typical synthesis conditions were n(Co)/n(SiO2)=0.01-0.04,n(SiO2)/n(Al2O3)=20-50,n(H2O)/n(SiO2)=40,n(Na2O)/n(SiO2)=0.4,crystallization temperature 170 °C,and crystallization time 3-7 d.The structure-directing function of Na+ ions in the absence of an organic template was discussed.Products obtained by the present allinorganic systems possess open micropores and do not require traditional high-temperature calcination.Thus,we demonstrate a low cost,low energy consumption,and environmentally benign synthesis of Co-mordenite.%在硅酸钠、硫酸铝、硝酸钴和氢氧化钠的全无机体系条件下,采用无有机模板剂水热法合成了Co同晶取代的丝光沸石分子筛.通过粉末X射线衍射(XRD)、扫描电子显微镜(SEM)、电感耦合等离子体(ICP)光谱、氮气吸附、紫外-可见(UV-Vis)光谱、热重(TG)分析等手段对所得固体产物的织构性质以及钴在分子筛中的存在状态进行了表征.结果表明,该方法成功地将Co离子引入到丝光沸石分子筛的骨架结构中,未发现骨架外Co物种.典型的合成条件为n(Co)/n(SiO2) =0.01-0.04,n(SiO2)/n(AI2O3)=20-50,n(H2O)/n(SiO2) =40,n(Na2O)/n(SiO2)=0.4,晶化温度170°C,晶化时间3-7 d.讨论了Na+离子在无有机模板剂合成中的结构导向作用.全无机体系合成得到的产
Ethylene is a plant hormone that regulates many aspects of plant growth and development, germination, fruit ripening, senescence, sex determination, abscission, defense, gravitropism, epinasty, and more. For experimental purposes, one needs to treat plant material with ethylene and its inhibitors t...
Green's Relation R on the Monoid of Clone Endomorphisms
Thawhat Changphas; Klaus Denecke
2005-01-01
A hypersubstitution is a map which takes n-ary operation symbols to n-ary terms. Any such map can be uniquely extended to a map defined on the set Wτ(X)of all terms of type τ, and any two such extensions can be composed in a natural way.Thus, the set Hyp(τ) of all hypersubstitutions of type τ forms a monoid. In this paper,we characterize Green's relation R on the monoid Hyp(τ) for the type τ = (n, n). In this case, the monoid of all hypersubstitutions is isomorphic with the monoid of all clone endomorphisms. The results can be applied to mutually derived varieties.
Relation entre l’entropie physique et l’énergie de simulation
Bigerelle, Maxence; IOST, Alain
2007-01-01
International audience; It is shown that an isomorphism exists between the mixing entropy and the size of a computer program that simulates the physical system. This isomorphism must be constructed with respect to some theorems, and it is shown that the composition of two isomorphisms, one based on a run length encoding and another by encoding sequences in a dictionary allows us to quantify the entropy of binary and ternary systems at the equilibrium. Finally, it is shown that the energy cons...
2010-10-20
... Ms. Yvette Springer at Yspringer@bis.doc.gov no later than October 26, 2010. A limited number of... public presentation materials prior to the meeting to Ms. Springer via email. The Assistant Secretary for... portions of the meeting will be open to the public. For more information, call Yvette Springer at (202)...
2012-08-21
... distribution of public presentation materials to Committee members, the Committee suggests that presenters forward the public presentation materials prior to the meeting to Ms. Springer via email. The Assistant... Ms. Yvette Springer at Yvette.Springer@bis.doc.gov no later than September 6, 2012. A limited...
2013-02-15
... distribution of public presentation materials to Committee members, the Committee suggests that presenters forward the public presentation materials prior to the meeting to Ms. Springer via email. The Assistant... Ms. Yvette Springer at Yvette.Springer@bis.doc.gov no later than February 28, 2013. A limited...
Two Patterns of Race Relations.
Bonilla, Eduardo Seda
What North Americans term "race" is not structurally isomorphic to and, thus, not synonymous with what Latin Americans apply the term to. The social identities determined by "race", and consequently the expected behavior ascribed to these identities, are so dissimilar that meetings between persons of both cultures produce uncertainty and discord.…
Optimization of β-decision rules relative to number of misclassifications
Zielosko, Beata
2012-01-01
In the paper, we present an algorithm for optimization of approximate decision rules relative to the number of misclassifications. The considered algorithm is based on extensions of dynamic programming and constructs a directed acyclic graph Δ β (T). Based on this graph we can describe the whole set of so-called irredundant β-decision rules. We can optimize rules from this set according to the number of misclassifications. Results of experiments with decision tables from the UCI Machine Learning Repository are presented. © 2012 Springer-Verlag.
Relative gut lengths of coral reef butterflyfishes (Pisces: Chaetodontidae)
Berumen, Michael L.
2011-06-17
Variation in gut length of closely related animals is known to generally be a good predictor of dietary habits. We examined gut length in 28 species of butterflyfishes (Chaetodontidae), which encompass a wide range of dietary types (planktivores, omnivores, and corallivores). We found general dietary patterns to be a good predictor of relative gut length, although we found high variation among groups and covariance with body size. The longest gut lengths are found in species that exclusively feed on the living tissue of corals, while the shortest gut length is found in a planktivorous species. Although we tried to control for phylogeny, corallivory has arisen multiple times in this family, confounding our analyses. The butterflyfishes, a speciose family with a wide range of dietary habits, may nonetheless provide an ideal system for future work studying gut physiology associated with specialization and foraging behaviors. © 2011 Springer-Verlag.
A Faster-than Relation for Asynchronous Processes
2001-01-01
Lecture Notes in Computer Science , Lisbon, Portugal, June 1998, Springer... Lecture Notes in Computer Science , Warsaw, Poland, July 1997, Springer-Verlag, pp. 166{180. [12] R. Cleaveland and S. Sims, The NCSU Concurrency...Workbench, in Computer Aided Veri cation (CAV ), R. Alur and T. Henzinger, eds., Vol. 1102 of Lecture Notes in Computer Science , New Brunswick, NJ,
Amin, Talha
2013-01-01
In the paper, we present a comparison of dynamic programming and greedy approaches for construction and optimization of approximate decision rules relative to the number of misclassifications. We use an uncertainty measure that is a difference between the number of rows in a decision table T and the number of rows with the most common decision for T. For a nonnegative real number γ, we consider γ-decision rules that localize rows in subtables of T with uncertainty at most γ. Experimental results with decision tables from the UCI Machine Learning Repository are also presented. © 2013 Springer-Verlag.
A note on the correspondence between qubit quantum operations and special relativity
Arrighi, Pablo [Computer Laboratory, University of Cambridge, 15 JJ Thomson Avenue, Cambridge CB3 0FD (United Kingdom); Patricot, Christophe [DAMTP, Centre for Mathematical Sciences, University of Cambridge, Wilberforce Road, Cambridge CB3 0WA (United Kingdom)
2003-05-23
We exploit a well-known isomorphism between complex Hermitian 2 x 2 matrices and R{sup 4}, which yields a convenient real vector representation of qubit states. Because these do not need to be normalized we find that they map onto a Minkowskian future cone in E{sup 1,3}, whose vertical cross-sections are nothing but Bloch spheres. Pure states are represented by light-like vectors, unitary operations correspond to special orthogonal transforms about the axis of the cone, positive operations correspond to pure Lorentz boosts. We formalize the equivalence between the generalized measurement formalism on qubit states and the Lorentz transformations of special relativity, or more precisely elements of the restricted Lorentz group together with future-directed null boosts. The note ends with a discussion of the equivalence and some of its possible consequences. (letter to the editor)
A Note on the correspondence between Qubit Quantum Operations and Special Relativity
Arrighi, P; Arrighi, Pablo; Patricot, Christophe
2003-01-01
We exploit a well-known isomorphism between complex hermitian $2\\times 2$ matrices and $\\mathbb{R}^4$, which yields a convenient real vector representation of qubit states. Because these do not need to be normalized we find that they map into a Minkowskian cone in $\\mathbb{E}^{(3,1)}$, whose vertical cross-sections are nothing but Bloch spheres. Pure states are represented by light-like vectors, unitary operations correspond to special orthogonal transforms about the axis of the cone, positive operations correspond to pure Lorentz boosts. We formalize the equivalence between the generalized measurement formalism on qubit states and the Lorentz transformations of special relativity, or more precisely elements of the restricted Lorentz group together with future-directed null boosts. The note ends with an informal discussion of the equivalence and some of its possible consequences.
Relativity made relatively easy
Steane, Andrew M
2012-01-01
Relativity Made Relatively Easy presents an extensive study of Special Relativity and a gentle (but exact) introduction to General Relativity for undergraduate students of physics. Assuming almost no prior knowledge, it allows the student to handle all the Relativity needed for a university course, with explanations as simple, thorough, and engaging as possible.The aim is to make manageable what would otherwise be regarded as hard; to make derivations as simple as possible and physical ideas as transparent as possible. Lorentz invariants and four-vectors are introduced early on, but tensor not
On the relative importance of excluded minors
Hall, R.; Mayhew, D.; Zwam, S.H.M. van
2011-01-01
If EE is a set of matroids, then ex(EE) denotes the set of matroids that have no minor isomorphic to a member of EE. If EE' is a subset of EE, we say that EE' is /superfluous/ if ex(EE - EE') - ex(EE) contains only finitely many 3-connected matroids. We characterize the superfluous subsets of six we
VUKADIN M. LEOVAC
2006-06-01
Full Text Available The template reaction of a warm methanolic solution of Ni(OAc2·4H2O, S-n-propylisothiosemicarbazide hydroiodide and acetylacetone yielded the needle- like, brown, diamagnetic complex [Ni(L–H]I·MeOH, and in the presence of an excess of NH 4NCS, brown, prismatic crystals of the complex [Ni(L–H]NCS (1, both compounds involving the monoanionic form of the ligand, acetylacetone bis(S-n-propylisothiosemicarbazone, L. Slow recrystallization fromMeOH, EtOH, iPrOH and Me2CO gave the corresponding monosolvent complexes [Ni(L–H]I·solvent, of which only those involving EtOH and iPrOH were suitable for structural analysis. The crystallographic parameters of [Ni(L–H]I·EtOH (2 and [Ni(L–H]I·iPrOH (3 are very similar to each other, showing their structures are isomorphic. The crystal structures of the title compounds consist of the independent ions: NCS-, or I-, and the chemically identical cation [Ni(L–H]+, where L–H is the monoanion resulting from deprotonation of the acetylacetone moiety, a tetradentate N4 ligand forming a square-planar coordination around a Ni(II ion. It was found that the isothiosemicarbazide fragment of the ligand has an imido form. The complex cations of the compounds [Ni(L–H]NCS and [Ni(L–H]I·EtOH exhibit significant difference only in the conformation of their propyl groups.
李爱国
2014-01-01
基于需要动机理论和择业动机理论，突破“生存型创业只受生存动机的驱动，机会型创业只受机会动机驱动”的传统创业动机理论的局限，提出“大学生机会型创业及生存型创业的动机均由生存动机和机会动机共同驱动，两种类型的创业动机在组成上呈现同构性，在结构上存在显著差异性”的研究假设，并构建出6因子创业动机测量模型。利用问卷调查数据进行验证性因子分析和独立样本t检验，证实了两种类型大学生创业动机的同构性及差异性。%The paper breaks through the limitation in traditional entrepreneurship motivation theory which indicates that "necessity-based entrepreneurship is only driven by necessity motivation, while opportunity-based entrepreneurship is only driven by entrepreneurship motivation", and puts forward hypotheses that "both undergraduates' necessity entrepreneurship and opportunity entrepreneurship are driven by necessity motivation and opportunity motivation, and these two types of entrepreneurial motivation display isomorphism in composition and significant differences in structure " based on Hierarchy of Needs Theory and Expectation Theory of Motivation. In addition, the paper establishes a model applying six components to measure undergraduates' entrepreneurial motivation. The paper finally authenticate the hypotheses through confirmatory factor analysis and independent sample T test.
B.G. Jacob
2013-12-01
Full Text Available In this research,prevalence values based on Monthly Biting Rates (MBR were employed as aresponse variable in a Poisson probability model framework for quantitativelyregressing multiple georefernced explanatory environmental-related explanatorycovariates of seasonally-sampled larval habitat of Similium damnosum s.l.ablack fly vector of Onchocerciasis in ariverine study site in Burkina Faso. Results from both a Poisson and then anegative binomial (i.e., a Poisson random variable with a gamma distrustedmean revealed that the covariates rendered from the model were significant,but furnished virtually no predictive power for mapping endemic transmissionzones. Inclusion of indicator variables denoting the time sequence and thelocational spatial structure was then articulated with Thiessen polygons whichalso failed to reveal meaningful covariates. Thereafter, a spatiotemporalautocorrelation analyses was performed and an Autoregressive Integrated MovingAverage (ARIMA model was constructed which revealed a prominent first-ordertemporal autoregressive structure in the sampled covariate coefficients. Arandom effects term was then specified which included a specific intercept termthat was a random deviation from the overall intercept term based on a drawfrom a normal frequency distribution. The specification revealed a non-constantmean across the riverine study site. This random intercept represented thecombined effect of all omitted covariates that caused the sampled georeferencedriverine –based villages at the study site to be more prone to onchocerciasisbased on regressed seasonal prevalence rates. Additionally, inclusion of arandom intercept assumed random heterogeneity in the propensity or, underlyingrisk of onchocerciasis which persisted throughout the entire duration of thetime sequence under study. This random effects term displayed serialcorrelation, and conformed closely to a bell-shaped curve. The model’s varianceimplied a substantial
Zwijnenburg, Martijn A; Corà, Furio; Bell, Robert G
2008-08-20
We employ periodic density functional theory calculations to compare the structural chemistry of silicon chalcogenides (silica, silicon sulfide) and anhydrous tetrahedral halides (beryllium fluoride, beryllium chloride). Despite the different formal oxidation states of the elements involved, the divalent halides are known experimentally to form crystal structures similar to known SiX2 frameworks; the rich polymorphic chemistry of SiO2 is however not matched by divalent halides, for which a very limited number of polymorphs are currently known. The calculated energy landscapes yield a quantitative match between the relative polymorphic stability in the SiO2/BeF2 pair, and a semiquantitative match for the SiS2/BeCl2 pair. The experimentally observed polymorphs are found to lie lowest in energy for each composition studied. For the two BeX2 compounds studied, polymorphs not yet synthesized are predicted to lie very low in energy, either slightly above or even in between the energy of the experimentally observed polymorphs. The experimental lack of polymorphism for tetrahedral halide materials thus does not appear to stem from a lack of low-energy polymorphs but more likely is the result of a lack of experimental exploration. Our calculations further indicate that the rich polymorphic chemistry of SiO2 can be potentially matched, if not extended, by BeF2, provided that milder synthetic conditions similar to those employed in zeolite synthesis are developed for BeF2. Finally, our work demonstrates that both classes of materials show the same behavior upon replacement of the 2p anion with the heavier 3p anion from the same group; the thermodynamic preference shifts from structures with large rings to structures with larger fractions of small two and three membered rings.
Carl, L.M.
2008-01-01
The objective of the study was to test the hypothesis that lake trout populations change in relation to cisco, lake whitefish, round whitefish and burbot populations in lakes in the Algonquin Highlands region of Ontario. Lake trout population change is greatest where cisco and lake whitefish are present. Lake trout populations in lakes without either coregonine tend to have small adults and many juveniles. Where cisco or lake whitefish are present, adult lake trout are large, juvenile abundance is low, and the stock-recruit relationship appears to be uncoupled likely due to a larval bottleneck. Lake trout populations in these lakes may be sensitive to overfishing and recruitment failure. Lake trout populations do not appear to change in relation to round whitefish. There appears to be an indirect positive change on juvenile lake trout abundance through reductions in the density of benthic coregonines in the presence of large, hypolimnetic burbot. ?? 2007 Springer Science+Business Media B.V.
Global Isomorphism and Governance Reform in Chinese Higher Education
Cai, Yuzhuo
2010-01-01
In the past three decades, higher education reforms have taken place almost everywhere in the world, and governance or the way that higher education is or should be coordinated has become a global topic. The governance reform in Chinese higher education emerged against such a background. The current studies on Chinese higher education reforms…
Mutation on Knots and Whitney's 2-Isomorphism Theorem
Zhi Yun CHENG; Hong Zhu GAO
2013-01-01
Whitney's 2-switching theorem states that any two embeddings of a 2-connected planar graph in S2 can be connected via a sequence of simple operations,named 2-switching.In this paper,we obtain two operations on planar graphs from the view point of knot theory,which we will term "twisting" and "2-switching" respectively.With the twisting operation,we give a pure geometrical proof of Whitney's 2-switching theorem.As an application,we obtain some relationships between two knots which correspond to the same signed planar graph.Besides,we also give a necessary and sufficient condition to test whether a pair of reduced alternating diagrams are mutants of each other by their signed planar graphs.
Characterizing ξ-Lie Multiplicative Isomorphisms on Von Neumann Algebras
Yamin Song
2014-01-01
Full Text Available Let ℳ and be von Neumann algebras without central summands of type I1. Assume that ξ∈ℂ with ξ≠1. In this paper, all maps Φ:ℳ→ satisfying ΦAB-ξBA=ΦAΦB-ξΦBΦ(A are characterized.
JavaScript Theft Detection using Birthmark and Subgraph Isomorphism
Nayakoji, Snehal N; Sonavane, S P
2014-01-01
In the web community, JavaScript has become one of the widely used languages. The facility of view source code, provided by many browsers, made easy to copy the JavaScript source code of any webpage. It leads to a serious threat of IPR law infringement. This problem of JavaScript theft can be addressed effectively with the help of novel scheme of deriving a birthmark which is the signature drawn from the program. As software birthmark represents unique characteristics of the program, this can...
Approximate Subgraph Isomorphism for Image Localization (Author’s Manuscript)
2016-02-18
In Intelligent Robots and Systems (IROS), 2010 IEEE/RSJ International Conference on, pages 3816–3823. IEEE, 2010. 1 [16] G. Schindler, M. Brown , and...Clements, R. Townshend, and A. Za- khor. User-driven geolocation of untagged desert imagery using digital elevation models. In Computer Vision and Pat
Type II1 factors satisfying the spatial isomorphism conjecture
Cameron, Jan; Christensen, Erik; Sinclair, Allan M.;
2012-01-01
Det vises at hvis et par af von Neumann algebraer er tilstrækkeligt tæt på hinanden i Hausdorff-metrikken, og den ene er en II1 faktor, som er et krydset produkt af en abelsk von Neumann algebra med en gruuppvirkning af en gruppe men triviel begrænset kohomologi, så er de to algebraer unitært...
Isomorphism and disorder in o-chlorohalobenzenes studied by NQR.
Pérez, Silvina C; Wolfenson, Alberto; Zuriaga, Mariano
2014-01-01
In this work we present experimental results that allow to characterize different solid modifications found in o-chlorohalobenzenes. Three disordered phases have been found in o-chlorobromobenzene. The stable phase at high temperature (phase I) is also obtained by quenching the sample at 77 K. Slow cooling allow to obtain the low temperature phase III which, on heating, transforms to phase II at 183 K and this, in turns, transforms to phase I at T~210 K. The disorder evidenced through the Nuclear Quadrupole Resonance spectra, is attributed to a random occupation of chlorine and bromine sites. In all phases there is evidence of molecular reorientations out of the benzene ring plane around the pseudo-symmetry axis between the atoms of Cl and Br. In o-chlorofluorobenzene two phases have been found depending on the cooling rate. One phase is disordered due to the random exchange of the occupation of Cl and F sites. In this case, there is also evidence of molecular reorientations out of the benzene ring plane, but in this case the reorientation is around the pseudo-symmetry axis that pass through the C-Cl bonds. Comparisons with the behavior of o-dichlorobenzene are also made.
2011-04-14
... presentation materials to Committee members, the Committee suggests that presenters forward the ] public presentation materials prior to the meeting to Ms. Springer via e-mail. The Assistant Secretary for... Springer at Yspringer@bis.doc.gov no later than April 28, 2011. A limited number of seats will be...
2011-01-20
... public presentation materials to Committee members, the Committee suggests that presenters forward the public presentation materials prior to the meeting to Ms. Springer via e-mail. The Assistant Secretary... Ms. Yvette Springer at Yspringer@bis.doc.gov no later than February 3, 2011. A limited number...
International relations; Relations internationales
Anon
2009-02-15
Concerning the european community, two meetings occurred during october 2008, the group on the nuclear safety and the waste management at Brussels and the meeting of W.E.N.R.A. (Western european nuclear regulator association). At the international level, the commission on safety standards took place in september 2008 at Vienna, a general conference of IAEA and the senor regulator meeting in september at Vienna. The worldwide conference of radiation protection (International radiation protection association -I.R.P.A.) took place under IAEA aegis at Buenos Aires in october 2008. Bilateral relations between France and South Africa, Germany, China, United States and Japan took place in october 2008 and were about information exchanges. (N.C.)
Barbour, J C; Murchadha, N O; Barbour, Julian; Foster, Brendan; Murchadha, Niall \\'O
2002-01-01
We give a new derivation of general relativity based entirely on three dimensional principles. We start with a parametrisation invariant, Jacobi-type action on superspace. This will be the product of a square root of a potential times the square root of a kinetic energy term. All we demand is that the action have nontrivial solutions. We find that the only viable action is the Baierlein, Sharp, Wheeler Lagrangian and thus we recover G.R. We impose no spacetime conditions whatsoever. We extend this to include scalar and vector fields. We recover causality (everything travels at the same speed), Maxwellian electrodynamics, and the gauge principle. Thus we derive a large part of modern physics from a purely three dimensional point of view.
International relations; Relations internationales
Anon
2009-07-15
The French nuclear safety authority (A.S.N.) has participated at different meeting in European Union as nuclear decommissioning assistance programme(N.D.A.P.), Regulatory assistance management group (R.A.M.G.) and Instrument for nuclear safety cooperation (I.N.S.C.). The members of Western European nuclear regulator association (W.E.N.R.A.) met and discussed about the future of W.E.N.R.A. and its representativeness and its cooperation with European nuclear safety regulator group (E.N.S.R.E.G.) and head of European radiation control authorities (H.E.R.C.A.). About International relations it is to noticed a meeting at the invitation of IAEA to discuss about the possibility to resort to the Ines scale for medical events. An audit mission under the IAEA aegis stood at Fessenheim, O.S.A.R.T. for operational safety review team. Two years and a half passed by between the audit mission Integrated regulatory review service (I.R.S.S.) welcome by A.S.N. in november 2006 and the audit mission follow up in 2009, 12 experts from 11 different countries and coordinated by three representatives of IAEA worked, the conclusions were that 90% of recommendations made to A.S.N. in 2006 were treated in a satisfying way; the evaluation gives three new recommendations, 7 new suggestions and 11 new correct practices. A meeting of the commission on safety standards (C.S.S.) stood in april 2009. Some others meeting are to be noticed: nuclear safety and security group (N.S.S.G.), expert group on nuclear and radiation safety (E.G.N.R.S.) instituted by the council of the Baltic sea states (C.B.S.S.) treats data exchange on the national networks of dose rates and surveillance of radioactivity in air. International nuclear regulator association (I.N.R.A.) held its first meeting in april 2009 at Seoul (Korea). Bilateral relations with Poland, Italy, Ukraine and Germany planed cooperation or information exchange in the field of nuclear safety. Participation to conference in Usa, meetings with United
Teresa Yurén
2006-10-01
Full Text Available Se analiza el caso de las licenciaturas para formar enseñantes del francés en México a fin de mostrar en qué y cómo las formas de mirar al otro y ser mirado por el otro condicionan los tipos de mediación y el tratamiento de las distancias culturales, lo que a su vez repercute en la apropiación de la lengua extranjera, la configuración del ethos profesional y la adquisición de competencias para la autoformación. Se obtuvieron datos cualitativos mediante entrevistas, observaciones y acopio de documentos y se trabajó combinando análisis estructural, analítica de las representaciones, analítica de la identidad, genealogía y análisis político del discurso. Como enfoque epistémico se adoptó la reconstrucción del dispositivo de formación, privilegiando la dimensión ético-política. Después de analizar las representaciones de los profesores sobre su tarea y su actividad como mediadores, así como sus identificaciones socioculturales, se identificaron cinco tipos de mediación y cuatro formas de tratamiento de la alteridad: la alteridad conjurada, la alteridad confiscada, la apertura aculturante y la apertura polivalente. Se encontró que esas formas de mirar al otro están también presentes en el ámbito de la cooperación educativa y cultural entre los países involucrados, así como en las estrategias y políticas de uso y difusión de la lengua desplegadas en la historia de dichos países. Se concluye que sólo una mirada no confiscatoria y con apertura polivalente contribuye a la apropiación de la lengua meta, la conformación de un ethos profesional autónomo y la adquisición de disposiciones para la autoformación. "The look of the other in the devices of foreign languages formation. Isomorphisms of linguistic policy and mediation". The case of the bachelor degrees for French teachers in Mexico is analyzed in order to show how the ways of looking at the other and be looked by the other can impact the mediation types and
Relating groundwater to seasonal wetlands in southeastern Wisconsin, USA
Skalbeck, J.D.; Reed, D.M.; Hunt, R.J.; Lambert, J.D.
2009-01-01
Historically, drier types of wetlands have been difficult to characterize and are not well researched. Nonetheless, they are considered to reflect the precipitation history with little, if any, regard for possible relation to groundwater. Two seasonal coastal wetland types (wet prairie, sedge meadow) were investigated during three growing seasons at three sites in the Lake Michigan Basin, Wisconsin, USA. The six seasonal wetlands were characterized using standard soil and vegetation techniques and groundwater measurements from the shallow and deep systems. They all met wetland hydrology criteria (e.g., water within 30 cm of land surface for 5% of the growing season) during the early portion of the growing season despite the lack of appreciable regional groundwater discharge into the wetland root zones. Although root-zone duration analyses did not fit a lognormal distribution previously noted in groundwater-dominated wetlands, they were able to discriminate between the plant communities and showed that wet prairie communities had shorter durations of continuous soil saturation than sedge meadow communities. These results demonstrate that the relative rates of groundwater outflows can be important for wetland hydrology and resulting wetland type. Thus, regional stresses to the shallow groundwater system such as pumping or low Great Lake levels can be expected to affect even drier wetland types. ?? Springer-Verlag 2008.
Bell, D A
1986-01-01
Relational Databases explores the major advances in relational databases and provides a balanced analysis of the state of the art in relational databases. Topics covered include capture and analysis of data placement requirements; distributed relational database systems; data dependency manipulation in database schemata; and relational database support for computer graphics and computer aided design. This book is divided into three sections and begins with an overview of the theory and practice of distributed systems, using the example of INGRES from Relational Technology as illustration. The
Viktor Ya.Tsvetkov
2015-12-01
Full Text Available The article organizes information relations. The article explores the implicative, quantitative, qualitative, logical and situational information relations. The article introduces the concept of implicative and situational relations. Article clarifies the definition of information relations. The article describes examples of information relations. The article shows the difference between the information field and information space. The article uses the concept of Aristotle "logical square" to explain the logic of information relations. This work combines scientific fields of linguistics, philosophy, logic, computer science, artificial intelligence.
Bräuner, E.V.; Andersen, Claus Erik; Andersen, H.P.;
2010-01-01
Background: In a recent population-based case-control study using 2,400 cases of childhood cancer, we found a statistically significant association between residential radon and acute lymphoblastic leukemia risk. Hypothesis: Traffic exhaust in the air enhances the risk association between radon...... risk within different strata of air pollution and traffic density. Results: The relative risk for childhood leukemia in association with a 103 Bq/m3-years increase in radon was 1.77 (1.11, 2.82) among those exposed to high levels of NOx and 1.23 (0.79, 1.91) for those exposed to low levels of NOx...... pollution from traffic may enhance the effect of radon on the risk of childhood leukemia. The observed tendency may also be attributed to chance. © 2010 Springer Science+Business Media B.V....
Theoretical aspects related to plasma flows observed in solar flares
Somov, Boris
I review the current state of affairs in the magnetohydrodynamic theories and models for large-scale high-speed plasma flows in solar flares. Main attension is payed to the coronal signatures and their relation to the photosphere and the heliosphere.The large-scale structure and dynamics of coronal plasma flows, as seen in EUV and soft X-rays, can be explained in terms of the three-dimensional reconnection at magnetic separators in the corona. More specifically, this reconnection is determined by the large-scale photospheric flows mainly of two types. First, the shear flows, which are parallel to the photospheric neutral line, increase the length of field lines in the corona an excess of magnetic energy. Second, the converging flows, directed to the neutral line, create the preflare slowly-reconnecting current layers in the corona and provide an excess of energy sufficient to produce a large flare. During the flare, both excesses of energy are released mainly as fast flows of coronal plasma as well as powerful heat fluxes and accelerated particles. The impulsive heating of the upper chromosphere creates a fast expansion of high-temperature plasma upwards into the corona, called the chromospheric `evaporation'. Basic properties of such flows are also reviewed together with draining with cooling. Ref.: Somov B.V., Plasma Astrophysics, Part II, Reconnection and Flares. Second Edition. Springer SBM, New York, 2013.
Due, P; Holstein, B; Lund, R
1999-01-01
We introduce a conceptual framework with social relations as the main concept and the structure and the function of social relations as subconcepts. The structure of social relations covers aspects of formal relations and social network. The function of social relations covers social support......, social anchorage and relational strain. We use this conceptual framework to describe social relations in the Danish population, with questionnaire data from the Danish Longitudinal Health Behaviour Study including a random sample of each of the age groups 25-, 50-, 60-and 70-year olds, N = 2......,011. The postal questionnaires were answered by a random sample in each of the age groups. The results show marked age and gender differences in both the structure and the function of social relations. The social network, measured as weekly contacts, weakens with age and so does instrumental support. Emotional...
Book Review on Bifurcation and Chaos in Engineering (Springer-Verlag, London, 1998)
Yushu Chen; Andrew Y.T.Leung
2000-01-01
@@ The discovery of Lorenz strange attractor in deterministic dynamical system in the 1960s has greatly promoted the development of nonlinear science covered over the theory and application fields of natural science, engineering science and sociology, and also brought about new vigor of the development of nonlinear oscillations.
Edgard Pisani (dir., 2007, Une politique mondiale pour nourrir le monde, Ed. Springer.
Benoît Lallau
2008-09-01
Full Text Available Voilà un ouvrage, qui, si j’ose dire, tombe bien. Ces derniers mois, les mauvaises nouvelles s’accumulent en effet sur la question alimentaire : renchérissement des denrées de base, grogne au Nord, émeutes de la faim au Sud. Des mauvaises nouvelles qui conduisent, il n’est que temps, à de nouveau débattre sérieusement de cette question. Et cet ouvrage apporte une contribution précieuse à ces débats, en avançant, dès son titre, une proposition essentielle : les tensions actuelles ne se résoudr...
van Wormer, Katherine
This books considers the many aspects of how the criminal justice system can be reshaped to address the needs of victims of violence and offenders who themselves are often the victims of abuse. It presents a new model that offers an integrated framework to combine tenets of social work's strengths framework with the restorative justice model. It…
Springer Autopsy of measurements with the ATLAS detector at the LHC
Beauchemin, Pierre-Hugues
2017-01-01
A lot of attention has been devoted to the study of discoveries in high energy physics (HEP), but less on measurements aiming at improving an existing theory like the standard model of particle physics, getting more precise values for the parameters of the theory or establishing relationships between them. This paper provides a detailed and critical study of how measurements are performed in recent HEP experiments, taking examples from differential cross section measurements with the ATLAS detector at the LHC. This study will be used to provide an elucidation of the concept of event used in HEP, in order to determine what constitutes an observation and what does not. It will highlight the essential place taken by theory-ladenness in order to produce observational facts, and will show how uncertainty and sensitivity estimates constitute an operational approach to robustness, inside the practice of science, avoiding potential circularity problem traditionally implied by theory-ladenness. This is in contrast to ...
Nina Blasse
2014-03-01
Full Text Available Zur Fragestellung, inwiefern Fachdidaktik(en und Geschlechterforschung zusammenhängen und wie sie zueinander in Beziehung gesetzt werden können, legen Marita Kampshoff und Claudia Wiepcke mit dem von ihnen herausgegebenen Handbuch in gebündelter Form allgemeine sowie fachspezifische Antworten vor. Es bietet somit eine notwendige Zusammenführung von bestehenden Erkenntnissen in einem Großteil der (Schul-Fachdidaktiken sowie einer kleinen Auswahl von Wissenschafts- und Querschnittsdisziplinen. Für Wissenschaftler*innen und Praktiker*innen wird damit erstmals in diesem Umfang ein Überblick über den diesbezüglichen Stand der Forschung bereitgestellt, auch wenn der Bezug zu den im ersten Teil des Bandes dargestellten theoretischen Grundlagen nicht immer gegeben ist.
van Wormer, Katherine
This books considers the many aspects of how the criminal justice system can be reshaped to address the needs of victims of violence and offenders who themselves are often the victims of abuse. It presents a new model that offers an integrated framework to combine tenets of social work's strengths framework with the restorative justice model. It…
When "Jerry Springer" Visits Your Classroom: Teaching Latina Literature in a Contested Ground.
Medina, Carmen
2001-01-01
Demonstrates how drama can highlight the complex process of readers' interpretations of texts, describing a study of Latina literature in a diverse fifth grade classroom. Results show how the Latina teacher-researcher read her students' interpretations of Latina cultural perspectives while also reading her as a Latina teacher-researcher. Results…
Molina, Juan Manuel; Lopez Cazorla, Andrea
2015-01-01
Chondrichthyans play an important role in structuring marine communities. Myliobatis goodie is an eagle ray reported from South Carolina in the USA (35°N) to Santa Cuz, Argentina (44°S), however little is known about this species, which is considered data deficient by the IUCN. In order to create adequate management strategies for this species, biological information is sorely needed. The objective of this study was to describe the biology of the population of M. goodei and its relationships with season, sex and the geographic features of Anegada Bay, Argentina (from 39.96°S to 40.60°S and from 62.10°W to 62.46°W) in 2008. Specifically, the population structure of M. goodie was studied by sex, seasons and sites, its food habits by seasons and sites, and the reproductive biology by seasons and sex. The results show that M. goodei exhibits seasonal migrations. Young-of-the-year remain in the bay all year long, while adults enter during spring and summer. Juveniles in spring are likely to become first-time mating individuals that migrate into open sea at the end of summer. These individuals would return to give birth for the first time and mate for the second time during the next year at summer. Anegada Bay would then be a mating and nursery area for the species. M. goodei behave as a generalist feeder with a uniform diet composed mainly of bivalves. Seasonal differences in the diet found arise from differences in prey diversity between summer and spring. Spatial differences, however, arise from the different abundances of caprellids and bivalves. Trophic level was 3.2 and it constitutes the first reference for this species, characterizing it as a secondary consumer.
2015-01-01
In this chapter, we emphasise what we have outlined as interesting areas of relational leadership and present some ideas on how to facilitate a broader understanding of relational leadership practice. This involves the interpretations that create connections between practice and ontology. We...... elaborate on how leadership in everyday situations can be understood from a relational perspective. The chapter will focus on outlining and inspiring the reader to co-operate with other people to develop further relational understandings of leading....
Weaver, Nik
2010-01-01
We define a "quantum relation" on a von Neumann algebra M \\subset B(H) to be a weak* closed operator bimodule over its commutant M'. Although this definition is framed in terms of a particular representation of M, it is effectively representation independent. Quantum relations on l^\\infty(X) exactly correspond to subsets of X^2, i.e., relations on X. There is also a good definition of a "measurable relation" on a measure space, to which quantum relations partially reduce in the general abelian case. By analogy with the classical setting, we can identify structures such as quantum equivalence relations, quantum partial orders, and quantum graphs, and we can generalize Arveson's fundamental work on weak* closed operator algebras containing a masa to these cases. We are also able to intrinsically characterize the quantum relations on M in terms of families of projections in M \\otimes B(l^2).
External symmetry in general relativity
Cotaescu, I I
2000-01-01
We propose a generalization of the isometry transformations to the geometric context of the field theories with spin where the local frames are explicitly involved. We define the external symmetry transformations as isometries combined with suitable tetrad gauge transformations and we show that these form a group which is locally isomorphic with the isometry one. We point out that the symmetry transformations that leave invariant the equations of the fields with spin have generators with specific spin terms which represent new physical observables. The examples we present are the generators of the central symmetry and those of the maximal symmetries of the de Sitter and anti-de Sitter spacetimes derived in different tetrad gauge fixings. Pacs: 04.20.Cv, 04.62.+v, 11.30.-j
Baker, John G.
2009-01-01
Recent advances in numerical relativity have fueled an explosion of progress in understanding the predictions of Einstein's theory of gravity, General Relativity, for the strong field dynamics, the gravitational radiation wave forms, and consequently the state of the remnant produced from the merger of compact binary objects. I will review recent results from the field, focusing on mergers of two black holes.
Baker, John G.
2009-01-01
Recent advances in numerical relativity have fueled an explosion of progress in understanding the predictions of Einstein's theory of gravity, General Relativity, for the strong field dynamics, the gravitational radiation wave forms, and consequently the state of the remnant produced from the merger of compact binary objects. I will review recent results from the field, focusing on mergers of two black holes.
Knudsen, Søren; Carpendale, Sheelagh
2016-01-01
In this paper, we explore the potential of using visual representations to support people in managing, organizing, and understanding relations between multiple visualization views. Multiple views can help people understand different facets of data and data processing, and are a crucial part of data...... analysis particularly when it is done collaboratively. Both the growing use of multiple views and the increasing display sizes have amplified the need to explore how to better help people to understand the relations between many views. To improve our understanding of how to visualize view relations, we...... invited visualization and interaction designers to critique and sketch representations of view relations. The participants provided design critiques, and sketched their own relation representations. Our findings expand the range and palette of ways of visually linking visualization views and suggest new...
RELATIVE PARAMETRIZATION OF LINEAR MULTIDIMENSIONAL SYSTEMS
Pommaret, Jean-François
2012-01-01
Presented for publication in the Springer journal MSSP:Multidimensional Systems and Signal Processing; In the last chapter of his book "The Algebraic Theory of Modular Systems " published in 1916, F. S. Macaulay developped specific techniques for dealing with " unmixed polynomial ideals " by introducing what he called " inverse systems ". The purpose of this paper is to extend such a point of view to differential modules defined by linear multidimensional systems, that is by linear systems of...
2012-09-11
The Relational Blackboard (RBB) is an extension of the H2 Relational Database to support discrete events and timeseries data. The original motivation for RBB is as a knowledge base for cognitive systems and simulations. It is useful wherever there is a need for persistent storage of timeseries (i.e. samples of a continuous process generating numerical data) and semantic labels for the data. The RBB is an extension to the H2 Relational Database, which is open-source. RBB is a set of stored procedures for H2 allowing data to be labeled, queried, and resampled.
Discourses of relations and relational
Hosking, D.M.
2006-01-01
This is a story of relations and relating. There is no wolf, no Little Red Riding Hood; there are no bears, nor little piggies. It is not a heroic tale of how one particular discourse proves its superiority by vanquishing other discourses; it is not a tale told from behind the wings, the modernist a
2015-01-01
This first chapter presents the exploratory and curious approach to leading as relational processes – an approach that pervades the entire book. We explore leading from a perspective that emphasises the unpredictable challenges and triviality of everyday life, which we consider an interesting......, relevant and realistic way to examine leading. The chapter brings up a number of concepts and contexts as formulated by researchers within the field, and in this way seeks to construct a first understanding of relational leading....
The use of discontinuities and functional groups to assess relative resilience in complex systems
Allen, C.R.; Gunderson, Lance; Johnson, A.R.
2005-01-01
It is evident when the resilience of a system has been exceeded and the system qualitatively changed. However, it is not clear how to measure resilience in a system prior to the demonstration that the capacity for resilient response has been exceeded. We argue that self-organizing human and natural systems are structured by a relatively small set of processes operating across scales in time and space. These structuring processes should generate a discontinuous distribution of structures and frequencies, where discontinuities mark the transition from one scale to another. Resilience is not driven by the identity of elements of a system, but rather by the functions those elements provide, and their distribution within and across scales. A self-organizing system that is resilient should maintain patterns of function within and across scales despite the turnover of specific elements (for example, species, cities). However, the loss of functions, or a decrease in functional representation at certain scales will decrease system resilience. It follows that some distributions of function should be more resilient than others. We propose that the determination of discontinuities, and the quantification of function both within and across scales, produce relative measures of resilience in ecological and other systems. We describe a set of methods to assess the relative resilience of a system based upon the determination of discontinuities and the quantification of the distribution of functions in relation to those discontinuities. ?? 2005 Springer Science+Business Media, Inc.
Family Risk Factors Among Women With Addiction-Related Problems: An Integrative Review
Abasi
2016-02-01
Full Text Available Context Recent years have produced many articles about women’s addiction and its risk factors and the consequences of substance use and misuse in the emotional, social, psychological, and economic domains of life. Family vulnerabilities are one of the most important variables contributing to addiction among women. Thus, the purpose of this article is to investigate areas of family life that lead to women’s taking up and maintaining drug and alcohol abuse. Evidence Acquisition A database search of PubMed, ScienceDirect, Springer, and Google Scholar was conducted using the following keywords: “women and addiction”, “women addiction and family”, “addiction”, “substance abuse” and “family”. For the first step, we chose studies that were conducted between 2000 and 2015, and for the second step, studies conducted before 2000. We categorized all search results into three main groups: processes related to family disturbances, factors related to parenting styles, and variables related to partners. Results Partners, parenting styles, and family disturbances are three main factors affecting children growing up in a family and their inclination toward addiction. Some of these pathways are complicated and indirect, and some are straightforward. Conclusions Future research should pay more attention to the mechanisms and pathways mediating or moderating the relationship between family risk factors and addiction in women. Clinicians and researchers should keep in mind these vulnerabilities and take into consideration factors special to processes related to addiction in women.
Wolff, Phillip; Holmes, Kevin J
2011-05-01
The central question in research on linguistic relativity, or the Whorfian hypothesis, is whether people who speak different languages think differently. The recent resurgence of research on this question can be attributed, in part, to new insights about the ways in which language might impact thought. We identify seven categories of hypotheses about the possible effects of language on thought across a wide range of domains, including motion, color, spatial relations, number, and false belief understanding. While we do not find support for the idea that language determines the basic categories of thought or that it overwrites preexisting conceptual distinctions, we do find support for the proposal that language can make some distinctions difficult to avoid, as well as for the proposal that language can augment certain types of thinking. Further, we highlight recent evidence suggesting that language may induce a relatively schematic mode of thinking. Although the literature on linguistic relativity remains contentious, there is growing support for the view that language has a profound effect on thought. WIREs Cogni Sci 2011 2 253-265 DOI: 10.1002/wcs.104 For further resources related to this article, please visit the WIREs website. Copyright © 2010 John Wiley & Sons, Ltd.
On Super (a, d-H-Antimagic Total Covering of Star Related Graphs
Kathiresan K.M.
2015-11-01
Full Text Available Let G = (V (G,E(G be a simple graph and H be a subgraph of G. G admits an H-covering, if every edge in E(G belongs to at least one subgraph of G that is isomorphic to H. An (a, d-H-antimagic total labeling of G is a bijection λ: V (G ∪ E(G → {1, 2, 3, . . . , |V (G| + |E(G|} such that for all subgraphs H′ isomorphic to H, the H′ weights
Demann, Eric T K; Stein, Pamela S; Levitt, Christine; Shelton, Keith E
2008-07-01
This review highlights some of the more important employee relation aspects involved in starting, establishing, or expanding an existing dental practice. Despite a competitive compensation package, staff-related conflicts can sometimes hamper the progress of a dental practice. Such conflicts can be reduced by having policies and procedures in place for each employee that set expectations concerning the hours of operation, professional manner, dress code, job tasks, performance evaluations, disciplinary actions, and termination if violations occur. Understanding the legal requirements set by various governmental agencies such as OSHA can help ensure that the rights and well-being of every employee are protected.
Selleri, Franco
2015-01-01
Weak Relativity is an equivalent theory to Special Relativity according to Reichenbach’s definition, where the parameter epsilon equals to 0. It formulates a Neo-Lorentzian approach by replacing the Lorentz transformations with a new set named “Inertial Transformations”, thus explaining the Sagnac effect, the twin paradox and the trip from the future to the past in an easy and elegant way. The cosmic microwave background is suggested as a possible privileged reference system. Most importantly, being a theory based on experimental proofs, rather than mutual consensus, it offers a physical description of reality independent of the human observation.
Durell, Clement V
2003-01-01
Concise and practical, this text by a renowned teacher sketches the mathematical background essential to understanding the fundamentals of relativity theory. Subjects include the velocity of light, measurement of time and distance, and properties of mass and momentum, with numerous diagrams, formulas, and examples, plus exercises and solutions. 1960 edition.
Søndergaard, Morten
2011-01-01
contribute to and learn from entrepreneurship research. In a number of workshops sponsored by the Knowledge Foundation and the Bank of Sweden Tercentenary Foundation, a group of international scholars, practicing artists, and representatives of funding organizations have addressed issues such as opportunity......) Entrepreneurship on the art arena - An ecological perspective (Mikael Scherdin and Ivo Zander) Distant relations - Art practice in a global culture (Morten Søndergaard) Art entrepreneurship - A commentary (Daved Barry) Summary and policy implications (Mikael Scherdin and Ivo Zander)...
Social Relations and Relational Incentives
A.J. Dur (Robert); J. Tichem (Jan)
2012-01-01
textabstractThis paper studies how social relationships between managers and employees affect relational incentive contracts. To this end we develop a simple dynamic principal-agent model where both players may have feelings of altruism or spite toward each other. The contract may contain two types
Supercharacters, symmetric functions in noncommuting variables, and related Hopf algebras
Aguiar, Marcelo; Benedetti, Carolina; Bergeron, Nantel; Chen, Zhi; Diaconis, Persi; Hendrickson, Anders; Hsiao, Samuel; Isaacs, I Martin; Jedwab, Andrea; Johnson, Kenneth; Karaali, Gizem; Lauve, Aaron; Le, Tung; Lewis, Stephen; Li, Huilan; Magaard, Kay; Marberg, Eric; Novelli, Jean-Christophe; Pang, Amy; Saliola, Franco; Tevlin, Lenny; Thibon, Jean-Yves; Thiem, Nathaniel; Venkateswaran, Vidya; Vinroot, C Ryan; Yan, Ning; Zabrocki, Mike
2010-01-01
We identify two seemingly disparate structures: supercharacters, a useful way of doing Fourier analysis on the group of unipotent uppertriangular matrices with coefficients in a finite field, and the ring of symmetric functions in noncommuting variables. Each is a Hopf algebra and the two are isomorphic as such. This allows developments in each to be transferred. The identification suggests a rich class of examples for the emerging field of combinatorial Hopf algebras.
Mould, Richard A
1994-01-01
This comprehensive textbook develops in a logical and coherent way both the formalism and the physical ideas of special and general relativity. Part one focuses on the special theory and begins with the study of relativistic kinematics from three points of view. Part two begins with a chapter introducing differential geometry. Subsequent chapters cover: rotation, the electromagnetic field, and material media. A second chapter on differential geometry provides the background for Einstein's gravitational-field equation and Schwarzschild's solution. The book is aimed at advanced undergraduates and beginning graduate students in physics or astrophysics.
Søndergaard, Morten
2011-01-01
Art EntrepreneurshipIvo Zander Mikael Scherdin This project is funded and sponsored by the Knowledge Foundation, the Bank of Sweden Tercentenary Foundation, and the Department of Business Studies, Uppsala University2008-2009This cutting edge project asks what art and artistic processes can contri......) Entrepreneurship on the art arena - An ecological perspective (Mikael Scherdin and Ivo Zander) Distant relations - Art practice in a global culture (Morten Søndergaard) Art entrepreneurship - A commentary (Daved Barry) Summary and policy implications (Mikael Scherdin and Ivo Zander)...
Canuto, V
2015-01-01
This is an English translation of the Italian version of an encyclopedia chapter that appeared in the Italian Encyclopedia of the Physical Sciences, edited by Bruno Bertotti (1994). Following requests from colleagues we have decided to make it available to a more general readership. We present the motivation for constructing General Relativity, provide a short discussion of tensor algebra, and follow the set up of Einstein equations. We discuss briefly the initial value problem, the linear approximation and how should non gravitational physics be described in curved spacetime.
赵柳
2011-01-01
The group G of general coordinate transformations on the thermodynamic configuration space ε spanned by all the extensive variables keeps the first law of thermodynamics invariant. One can introduce a metric with Lorentzian signature on the space ε, with the corresponding line element also being invariant under the action of G. This line element is identi6ed as the square of the proper entropy. Thus the second law of thermodynamics is also formulated invariantly and this lays down the foundation for the principle of thermal relativity.
Khriplovich, I. B
2005-01-01
This book offers an alternative to other textbooks on the subject, providing a more specific discussion of numerous general relativistic effects for readers who have knowledge of classical mechanics and electrodynamics, including special relativity. Coverage includes gravitational lensing, signal retardation in the gravitational field of the Sun, the Reissner-Nordström solution, selected spin effects, the resonance transformation of an electromagnetic wave into a gravitational one, and the entropy and temperature of black holes. The book includes numerous problems at various levels of difficulty, making it ideal also for independent study by a broad readership of advanced students and researchers. I.B. Khriplovich is Chief Researcher, Budker Institute of Nuclear Physics, Novosibirsk, and Chair of Theoretical Physics at Novosibirsk University. Dr. Khriplovich is a Corresponding Member of the Russian Academy of Sciences. He has been awarded the Dirac Medal ``For the advancement of theoretical physics'' by Univ...
This is the textbook for the Open University module International Relations: Continuity and Change in Global Politics. Instead of leading with a succession of theoretical 'isms', the module structures its presentation of the subject around six teaching ‘blocks’, each of which explores a dilemma......: Flat or uneven? Change and transformation in the international system • Block 3: Just or unjust? Intervention and inequality in the international system • Block 4: Top-down or bottom-up? Governance in the international system • Block 5: Secure or insecure? Pursuing security in the international system...... • Block 6: Continuity or change in global politics? Each block introduces new IR theories through discussions of the substantive dilemmas and adds in a layered way levels of analysis and conceptual complexity....
Faraoni, Valerio
2013-01-01
This book offers an essential bridge between college-level introductions and advanced graduate-level books on special relativity. It begins at an elementary level, presenting and discussing the basic concepts normally covered in college-level works, including the Lorentz transformation. Subsequent chapters introduce the four-dimensional worldview implied by the Lorentz transformations, mixing time and space coordinates, before continuing on to the formalism of tensors, a topic usually avoided in lower-level courses. The book’s second half addresses a number of essential points, including the concept of causality; the equivalence between mass and energy, including applications; relativistic optics; and measurements and matter in Minkowski spacetime. The closing chapters focus on the energy-momentum tensor of a continuous distribution of mass-energy and its covariant conservation; angular momentum; a discussion of the scalar field of perfect fluids and the Maxwell field; and general coordinates. Every chapter...
Estimating material parameters of a structurally based constitutive relation for skin mechanics
Jor, Jessica W. Y.
2010-11-25
This paper presents a structurally based modeling framework to characterize the structure-function relation in skin tissues, based upon biaxial tensile experiments performed in vitro on porcine skin. Equi-axial deformations were imposed by stretching circular skin specimens uniformly along twelve directions, and the resultant loads at the membrane attachment points were measured. Displacement fields at each deformation step were tracked using an image 2D cross-correlation technique. A modeling framework was developed to simulate the experiments, whereby measured forces were applied to finite element models that were created to represent the geometry and structure of the tissue samples. Parameters of a structurally based constitutive relation were then identified using nonlinear optimization. Results showed that the ground matrix stiffness ranged from 5 to 32 kPa, fiber orientation mean from 2 to 13. from the torso midline, fiber undulation mean from 1.04 to 1.34 and collagen fiber stiffness from 48 to 366 MPa. It was concluded that the objective function was highly sensitive to the mean orientation and that a priori information about fiber orientation mean was important for the reliable identification of constitutive parameters. © Springer-Verlag 2010.
Nashiro, Kaoru; Sakaki, Michiko; Mather, Mara
2012-01-01
Despite the fact that physical health and cognitive abilities decline with aging, the ability to regulate emotion remains stable and in some aspects improves across the adult life span. Older adults also show a positivity effect in their attention and memory, with diminished processing of negative stimuli relative to positive stimuli compared with younger adults. The current paper reviews functional magnetic resonance imaging studies investigating age-related differences in emotional processing and discusses how this evidence relates to two opposing theoretical accounts of older adults' positivity effect. The aging-brain model [Cacioppo et al. in: Social Neuroscience: Toward Understanding the Underpinnings of the Social Mind. New York, Oxford University Press, 2011] proposes that older adults' positivity effect is a consequence of age-related decline in the amygdala, whereas the cognitive control hypothesis [Kryla-Lighthall and Mather in: Handbook of Theories of Aging, ed 2. New York, Springer, 2009; Mather and Carstensen: Trends Cogn Sci 2005;9:496-502; Mather and Knight: Psychol Aging 2005;20:554-570] argues that the positivity effect is a result of older adults' greater focus on regulating emotion. Based on evidence for structural and functional preservation of the amygdala in older adults and findings that older adults show greater prefrontal cortex activity than younger adults while engaging in emotion-processing tasks, we argue that the cognitive control hypothesis is a more likely explanation for older adults' positivity effect than the aging-brain model.
海图语言语法及其隐喻关系综述%Overview on the Grammatical and Metaphorical Relations of the Nautical Chart Language
郭立新; 刘灿由
2012-01-01
There are some metaphorical mapping relations between the nautical chart language and natural language from their syntaxes to semantics and pragmatics. In this paper, the principles of the universal grammatical rules and the transformational-generative grammatical rules for the nautical chart language are focused on, and two types of grammatical metaphorical relations are discussed ty several modern linguistic theories. It is proposed that the grammatical isomorphism is the basis of the semantic interpretation consistency, which is the necessary condition of establishing the system for the general nautical chart language.%海图语言和自然语言在语法、语义、语用等方面都具有隐喻映射关系.以现代语言学理论为指导,研究了普遍语法原则、转换生成规则等海图语言的语法规则,探讨了海图语言语法的两类隐喻关系,提出了语法同构性是语义解释一致性的基础,并以其作为构建通用海图语言系统的前提条件.
Park, J.-M.; Manen, J.-F.; Colwell, A.E.; Schneeweiss, G.M.
2008-01-01
The phylogenetic relationships of the non-photosynthetic Orobanche sensu lato (Orobanchaceae), which includes some of the economically most important parasitic weeds, remain insufficiently understood and controversial. This concerns both the phylogenetic relationships within the genus, in particular its monophyly or lack thereof, and the relationships to other holoparasitic genera such as Cistanche or Conopholis. Here we present the first comprehensive phylogenetic study of this group based on a region from the plastid genome (rps2 gene). Although substitution rates appear to be elevated compared to the photosynthetic members of Orobanchaceae, relationships among the major lineages Cistanche, Conopholis plus Epifagus, Boschniakia rossica (Cham. & Schltdl.) B. Fedtsch., B. himalaica Hook. f. & Thomson, B. hookeri Walp. plus B. strobilacea A. Gray, and Orobanche s. l. remain unresolved. Resolution within Orobanche, however, is much better. In agreement with morphological, cytological and other molecular phylogenetic evidence, five lineages, corresponding to the four traditionally recognised sections (Gymnocaulis, Myzorrhiza, Orobanche, Trionychon) and O. latisquama Reut. ex Boiss. (of sect. Orobanche), can be distinguished. A combined analysis of plastid rps2 and nuclear ITS sequences of the holoparasitic genera results in more resolved and better supported trees, although the relationships among Orobanche s. l., Cistanche, and the clade including the remaining genera is unresolved. Therefore, rps2 is a marker from the plastid genome that is well-suited to be used in combination with other already established nuclear markers for resolving generic relationships of Orobanche and related genera. ?? 2008 The Botanical Society of Japan and Springer.
Krauss, K.W.; Doyle, T.W.; Twilley, R.R.; Rivera-Monroy, V. H.; Sullivan, J.K.
2006-01-01
Low and high water periods create contrasting challenges for trees inhabiting periodically flooded wetlands. Low to moderate flood durations and frequencies may bring nutrient subsidies, while greater hydroperiods can be energetically stressful because of oxygen deficiency. We tested the hypothesis that hydroperiod affects the growth of mangrove seedlings and saplings in a greenhouse experiment by varying flood duration while keeping salinity and soil fertility constant. We measured the growth of mangrove trees along a hydroperiod gradient over a two-year period by tracking fine-scale diameter increment. Greenhouse growth studies indicated that under a full range of annual flood durations (0-8760 h/year), hydroperiod alone exerted a significant influence on growth for one species, Laguncularia racemosa, when flooding was imposed for two growing seasons. Field evaluations, on the other hand, indicated that increased flood duration may provide nutrient subsidies for tree growth. Diameter growth was related curvilinearly to site hydroperiod, including flood duration and frequency, as well as to salinity and soil fertility. An analysis of soil physico-chemical parameters suggests that phosphorus fertility, which was also linked directly to hydroperiod, is likely to influence growth on south Florida mangrove sites. The physical removal of phosphorus by greater flood frequencies from upland sources and/or addition of phosphorus from tidal flooding balanced against increased soil aeration and reduced water deficits may be an extremely important growth determinant for south Florida mangroves. ?? Springer 2006.
Villadsen, Anders Ryom
2013-01-01
While the organizational structures and strategies of public organizations have attracted substantial research attention among public management scholars, little research has explored how these organizational core dimensions are interconnected and influenced by pressures for similarity....... In this paper I address this topic by exploring the relation between expenditure strategy isomorphism and structure isomorphism in Danish municipalities. Different literatures suggest that organizations exist in concurrent pressures for being similar to and different from other organizations in their field......-shaped relation exists between expenditure strategy isomorphism and structure isomorphism in a longitudinal quantitative study of Danish municipalities....
Relations between asymptotic and Fredholm representations
Manuilov, V M
1997-01-01
We prove that for matrix algebras $M_n$ there exists a monomorphism $(\\prod_n M_n/\\oplus_n M_n)\\otimes C(S^1) \\to {\\cal Q} $ into the Calkin algebra which induces an isomorphism of the $K_1$-groups. As a consequence we show that every vector bundle over a classifying space $B\\pi$ which can be obtained from an asymptotic representation of a discrete group $\\pi$ can be obtained also from a representation of the group $\\pi\\times Z$ into the Calkin algebra. We give also a generalization of the notion of Fredholm representation and show that asymptotic representations can be viewed as asymptotic Fredholm representations.
Experimental constraints on phase relations in subducted continental crust
Hermann, Jörg
2002-01-01
crust. The observed phase relations and phase compositions demonstrate that at pressures >3.0 GPa and temperatures >800 °C continental crust can retain significant amounts of H2O (>1 wt%), whereas K-free mafic or ultramafic rocks are dry at these conditions. UHP parageneses are only preserved if the whole exhumation path is situated within the stability field of phengite, i.e. if there is cooling during exhumation or if the whole exhumation occurred at T Springer LINK server located at http://dx.doi.org/10.1007/s00410-001-0336-3.
Structure of associative subalgebras of Jordan operator algebras
Hamhalter, J
2011-01-01
We show that any order isomorphism between ordered structures of associative unital JB-subalgebras of JBW algebras is implemented naturally by a Jordan isomorphism. Consequently, JBW algebras are determined by the structure of their associative unital JB subalgebras. Further we show that in a similar way it is possible to reconstruct Jordan structure from the order structure of associative subalgebras endowed with an orthogonality relation. In case of abelian subalgebras of von Neuman algebra it is we shown that order isomorphisms of the structure of abelian C*-subalgebras that are well behaved with respect to the structure of two by two matrices over original algebra are implemented by *-isomorphisms.
Martin, B.A.; Saiki, M.K.
2005-01-01
We assessed the relation between abundance of desert pupfish, Cyprinodon macularius, and selected biological and physicochemical variables in natural and manmade habitats within the Salton Sea Basin. Field sampling in a natural tributary, Salt Creek, and three agricultural drains captured eight species including pupfish (1.1% of the total catch), the only native species encountered. According to Bray-Curtis resemblance functions, fish species assemblages differed mostly between Salt Creek and the drains (i.e., the three drains had relatively similar species assemblages). Pupfish numbers and environmental variables varied among sites and sample periods. Canonical correlation showed that pupfish abundance was positively correlated with abundance of western mosquitofish, Gambusia affinis, and negatively correlated with abundance of porthole livebearers, Poeciliopsis gracilis, tilapias (Sarotherodon mossambica and Tilapia zillii), longjaw mudsuckers, Gillichthys mirabilis, and mollies (Poecilia latipinnaandPoecilia mexicana). In addition, pupfish abundance was positively correlated with cover, pH, and salinity, and negatively correlated with sediment factor (a measure of sediment grain size) and dissolved oxygen. Pupfish abundance was generally highest in habitats where water quality extremes (especially high pH and salinity, and low dissolved oxygen) seemingly limited the occurrence of nonnative fishes. This study also documented evidence of predation by mudsuckers on pupfish. These findings support the contention of many resource managers that pupfish populations are adversely influenced by ecological interactions with nonnative fishes. ?? Springer 2005.
On the Computation of the Relative Entropy of Probabilistic Automata
2007-01-17
other applications such as computa- tional biology [ Durbin et al., 1998] and image processing [Culik II and Kari, 1997]. The output of a large...the algebraic structure of a semiring [Kuich and Salomaa, 1986]. A semiring is a ring that may lack negation. Definition 1. A semiring is a system (K...Formal Languages, volume 3, pages 599–616. Springer, 1997. R. Durbin , S.R. Eddy, A. Krogh, and G.J. Mitchison. Biological Sequence Analy- sis
Cost Reduction in Vertically Related Industries: Integration versus Nonlinear Pricing,
1983-05-01
span/chord) 1.7-2.6 1.0-2.2 Ample evidence of these effects exists in the Turning angle (degrees) 68-110 70-111 open literature. For example, Hebbel ...posium Transsonicum II, Ed. Oswatitsch, K. and Rues, D., Springer-Verlag New York Inc., 1976. 0 18.5 Hebbel , H. The Influence of the Mach Number and the
Lagrange Theorem for polygroups
alireza sedighi
2014-12-01
Full Text Available So far?, ?isomorphism theorems in hyperstructure were proved for different structures of polygroups?, ?hyperrings and etc?. ?In this paper?, ?the polygroups properties is studied with the introduction of a suitable equivalence relation?. ?We show that the above relation is strongly regular?. ?Our main purpose in the paper is investigating Lagrang theorem and other expressing of isomorphism theorems for polygroups?.
Spatial Relation Resolution and Spatial Relation Abstraction
AI Tinghua; LIU Yaolin
2003-01-01
This paper attempts toregard spatial relation transformationas an important process in map gener-alization. The spatial relation generali-zation can be divided into the compo-nents of abstraction: topology, dis-tance and orientation. The concept‘ spatial relation resolution' is intro-duced to describe the constraints ofrelative spatial relation. On the basisof nine intersection models, the cardi-nal direction models and the iso-dis-tance-relation models, this paper givesthree sorts of relation resolution repre-sentations for topological, distance andorientation relation, respectively. Twomapping implementations in map gen-eralization is discussed.
Relative Derived Equivalences and Relative Homological Dimensions
Sheng Yong PAN
2016-01-01
Let A be a small abelian category. For a closed subbifunctor F of Ext1A (−,−), Buan has generalized the construction of Verdier’s quotient category to get a relative derived category, where he localized with respect to F-acyclic complexes. In this paper, the homological properties of relative derived categories are discussed, and the relation with derived categories is given. For Artin algebras, using relative derived categories, we give a relative version on derived equivalences induced by F-tilting complexes. We discuss the relationships between relative homological dimensions and relative derived equivalences.
Regina Weber
2014-03-01
Full Text Available Ina E. Bieber untersucht in ihrer Dissertation die Einflussfaktoren für erfolgreiche Bundestagskandidaturen von Frauen. Anhand von Längsschnitt- und Querschnittsdaten analysiert sie Faktoren auf der Mikroebene wie individuelle Eigenschaften und Dispositionen sowie Faktoren auf der Makroebene wie Partei- und Wahlsystemeinflüsse. Vor allem letztere wirken sich signifikant auf die Wahlchancen von Frauen aus. Allein das Geschlecht ist kein signifikanter Faktor für den Wahlerfolg zum Bundestag – vor allem die Zugehörigkeit zu Parteien des linken Spektrums und Kandidaturen auf Listenplätzen zeitigen für Frauen größere Chancen, erfolgreich zu kandidieren. Bei den individuellen Faktoren sind erwartete geschlechterspezifische Effekte, zum Beispiel durch Familienstand etc., nicht aufgetreten.
Sahra Dornick
2013-05-01
Full Text Available Ausgehend von Judith Butlers subjekt- und gesellschaftstheoretischen Interventionen beleuchten die Autor/-innen des erziehungswissenschaftlich orientierten Sammelbandes unterschiedliche Verhältnisse von Bildung und Geschlecht. In dem klar strukturierten Buch berücksichtigen sie dabei sowohl allgemeine Verflechtungsbeziehungen, theoretische Zusammenhänge als auch empirische Studien und interdiskursive Lektüren. Der solchermaßen umfassend herausgearbeitete Einblick in das erziehungswissenschaftliche Potential von Judith Butlers Theorie rahmt ihren hier erstmalig veröffentlichten Aufsatz „Gender and Education“ überzeugend ein.Based on Judith Butler’s subject- and social-theoretical interventions, the authors of this pedagogy-oriented anthology investigate various relationships of education and gender. This clearly structured book considers general complex interrelationships, theoretical connections, as well as empirical studies and interdiscursive readings. The comprehensive and elaborate insights into the pedagogical potential of Judith Butler’s theory convincingly frame her essay “Gender and Education,” which is published for the first time in this work.
Sahra Dornick
2013-10-01
Full Text Available In dieser spannenden Dissertation werden Männlichkeitskonstruktionen von zehn Erziehern, die in der außerhäuslichen Kinderbetreuung tätig sind, empirisch analysiert. Die qualitativ orientierte Studie wird durch einen umfassenden Überblick über die theoretischen Annahmen der sozialkonstruktivistischen Geschlechterforschung eingeleitet, welcher einen Schwerpunkt auf interaktionistische Akzentuierungen des ‚doing gender/doing masculinity‘ legt. Aufgrund dessen ist das Buch auch besonders für Leser/-innen geeignet, die über geringe soziologische Vorkenntnisse der Geschlechterforschung verfügen. Eine ausführlichere Analyse und Interpretation des Untersuchungsmaterials hätte allerdings den kritischen Blick auf aktuelle Maßnahmen der Familien- und Arbeitsmarktpolitik im Feld der außerhäuslichen frühkindlichen Betreuung schärfen können.This exciting dissertation empirically analyzes the constructions of masculinity of ten pre-school teachers, who work in external childcare. This qualitatively oriented study is prefaced by a comprehensive overview of the theoretical assumptions of social constructionist gender studies, which emphasizes interactionist accentuations of ‘doing gender/ doing masculinity.’ Therefore, the book is also particularly suitable for readers, who possess little prior knowledge in the field of sociological gender studies. However, a more detailed analysis and interpretation of the material could have led to a more critical look at current measures of family and labor market policy in the field of external early childhood education.
The National Environmental Observatory Network (NEON) has recently released a series of protocols presented with apparently broad community support for studies of small mammals and parasites. Sampling designs were outlined outlined, collectively aimed at understanding how changing environmental cond...
Cox, Carole B.
Noting that grandparents in the parenting role are often overwhelmed by the problems of their children, grandchildren, and the social milieu in which they live, this manual presents a 14-session workshop series designed to empower grandparents who are raising their grandchildren alone. Designed to complement "To Grandmother's House We Go and…
Fernanda Gabriela Elías
2015-08-01
Full Text Available Abstract: The paired oviducal glands of immature and mature females of Mustelus schmitti were examined macro and microscopically. Findings indicate that these glands possessed the same zonation as in most chondrichthyans from anterior to posterior: club, papillary, baffle and terminal zones. The whole gland is composed by simple tubular glands that connect with transverse grooves all along the organ. The club zone presents a typical indian club shape with a simple columnar and ciliated epithelium including secretory cells PAS (+ and AB (+. The papillary zone is characterized by lamella forming small and long cones in numbers of three. The epithelium of this zone contains ciliated cells with apical nuclei and secretory cells with basal nuclei that stain AB (+The baffle zone consists of apically flattened lamellae alternating with spinnerets which are small projections disposed by both sides of the plateau. This whole structure is present in number of 8 or 9 units. A simple columnar ciliated epithelium covers the plateau and spinnerets and no AB or PAS staining is observed. The epithelium of the terminal zone is PAS (- and AB (+, and elongated tubules, that run adjacent to the baffle zone are the site where groups of spermatozoa are clearly observed in the lumen. The epithelium of the sperm storage tubules do not stain with any of the dyes tested. Sperm was also observed in the baffle zone, presumably in its way to the fecundation in the oviduct because it displays no aggregation pattern and was between the folds of the epithelium. By scanning electron microscopy sperm was observed in the club and baffle zones in a gland which belonged to a pregnant female.
Tanglewood度假会议中心选择PAR Springer-Miller的酒店解决方案
无
2011-01-01
PAR Springer—Miller系统公司（PSMS）是PAR科技公司的全资子公司，同时也是领先的以顾客为中心的酒店管理系统提供商。今天PAR Springer—Miller系统公司宣布达拉斯附近Texoma湖的Tanglewood度假会议中心选择其SMSIHost酒店管理系统。
无
2010-01-01
Submission of a manuscript implies: that the work described has not been published before (except in the form of an abstract or as part of a published lecture, review, or thesis); that it is not under consideration for publication elsewhere; that its publication has been approved by all
J. A. Moreto
2007-06-01
characterized through X-ray diffraction, Rietveld structural refinement and Mössbauer spectroscopy. The determination and identification of crystallographic phases, lattice parameters and unit cell volume in as-milled and annealed samples allowed verifying structural parameters change, the spinel phase formation and possible relative deformations due to the high-energy ball milling process.
Alexandra Narcisa CIOBAN (LUCAN
2016-12-01
Full Text Available Through this paper we propose to identify and present the latest trends in valuing the corporate governance and audit features in relation to the company performance, measured in financial terms. Our research is qualitative, as it covers a wide range of approache from the perspective of academics and practitioners in the field. In this regard, we consulted the most important resources in the world scientific electronic documentation, such as: Thomson Reuters Web of Science, SpringerLink platform, PROQUEST Central, Oxford Journals, Emerald Journals and other research platforms. The contribution of this research it is valuable both for researchers in the area of financial accounting and practitioners, and aims to identify the recent challenges of the corporate governance and audit in influencing the financial performance of major companies around the world. We analyzed a variety of scientific publications on this subject, more than 70 empirical studies conducted in the US, China, Russia, Japan, India, Malaysia, the Arab countries, UK, Germany, Spain, Romania, etc. After having conducted the research, we carried out a platform with representative variables for corporate governance, audit and financial performance which will serve for future studies in the field. This will facilitate the researchers’ choice for building econometric analysis models since we also surprised existing limitations.
RELATIONAL ASPECTS OF RELATIONAL DATABASE DEPENDENCIES
Okuma, Hitomi; Kawahara, Yasuo
2000-01-01
This paper presents a relational treatment of inference rules for functional and multivalued dependencies in relational databases, to show the soundness and the completeness of the inference rules in Dedekind categories, which also cover the fuzzy case.
Social relations: network, support and relational strain
Due, P; Holstein, B; Lund, Rikke
1999-01-01
,011. The postal questionnaires were answered by a random sample in each of the age groups. The results show marked age and gender differences in both the structure and the function of social relations. The social network, measured as weekly contacts, weakens with age and so does instrumental support. Emotional......We introduce a conceptual framework with social relations as the main concept and the structure and the function of social relations as subconcepts. The structure of social relations covers aspects of formal relations and social network. The function of social relations covers social support......, social anchorage and relational strain. We use this conceptual framework to describe social relations in the Danish population, with questionnaire data from the Danish Longitudinal Health Behaviour Study including a random sample of each of the age groups 25-, 50-, 60-and 70-year olds, N = 2...
Incorporating Relation Paths in Neural Relation Extraction
Zeng, Wenyuan; Lin, Yankai; Liu, Zhiyuan; Sun, Maosong
2016-01-01
Distantly supervised relation extraction has been widely used to find novel relational facts from plain text. To predict the relation between a pair of two target entities, existing methods solely rely on those direct sentences containing both entities. In fact, there are also many sentences containing only one of the target entities, which provide rich and useful information for relation extraction. To address this issue, we build inference chains between two target entities via intermediate...
Visualizing relativity: The OpenRelativity project
Sherin, Zachary W.; Cheu, Ryan; Tan, Philip; Kortemeyer, Gerd
2016-05-01
We present OpenRelativity, an open-source toolkit to simulate effects of special relativity within the popular Unity game engine. Intended for game developers, educators, and anyone interested in physics, OpenRelativity can help people create, test, and share experiments to explore the effects of special relativity. We describe the underlying physics and some of the implementation details of this toolset with the hope that engaging games and interactive relativistic "laboratory" experiments might be implemented.
Neutrosophic Relational Database Decomposition
Meena Arora; Ranjit Biswas; Dr. U.S.Pandey
2011-01-01
In this paper we present a method of decomposing a neutrosophic database relation with Neutrosophic attributes into basic relational form. Our objective is capable of manipulating incomplete as well as inconsistent information. Fuzzy relation or vague relation can only handle incomplete information. Authors are taking the Neutrosophic Relational database [8],[2] to show how imprecise data can be handled in relational schema.
2010-04-21
... presentation materials to Committee members, the Committee suggests that presenters forward the public presentation materials prior to the meeting to Ms. Springer via email. The Assistant Secretary for... on a first come, first serve basis. To join the conference, submit inquiries to Ms. Yvette...
Creative Design of Digital Cognitive Games: Application of Cognitive Toys and Isomorphism
Sedig, Kamran; Haworth, Robert
2012-01-01
Digital cognitive games (DCGs) are games whose primary purpose is to mediate (i.e., support, develop, and enhance) cognitive activities such as problem solving, decision making, planning, and critical reasoning. As these games increase in popularity and usage, more attention should be paid to their design. Currently, there is a lack of design…
Tay, L.; Woo, S.E.; Vermunt, J.K.
2014-01-01
The conceptual and methodological framework for measurement equivalence procedures has been well established and widely used. Although multilevel theories and methods have been widely used in organizational research, there is no comparable framework for measurement equivalence of multilevel
Non-isomorphic nucleation pathways arising from morphological transitions of liquid channels
Kusumaatmaja, Halim; Jin, Chenyu; Mutihac, Radu-Cristian; Riegler, Hans
2012-01-01
Motivated by unexpected morphologies of the emerging liquid phase (channels, bulges, droplets) at the edge of thin, melting alkane terraces, we propose a new heterogeneous nucleation pathway. The competition between bulk and interfacial energies and the boundary conditions determine the growth and shape of the liquid phase at the edge of the solid alkane terraces. Calculations and experiments reveal a "pre-critical" shape transition (channel-to-bulges) of the liquid before reaching its critical volume along a putative shape-conserving path. Bulk liquid emerges from the new shape, and depending on the degree of supersaturation, the new pathway may have two, one, or zero energy barriers. The findings are broadly relevant for many heterogeneous nucleation processes because the novel pathway is induced by common, widespread surface topologies (scratches, steps, etc.).
汤涌; 江涛; 张季平; 樊蓉; 吴骋; 梁栋材; 常文瑞
2003-01-01
Earthworm fibrinolytic enzyme component A (EFEa) from Eisenia fetida, a protein functioning not only as a direct fibrinolytic enzyme, but also as a plasminogen activator, has been crystallized in P212121 space group with 3 proteinmolecules per asymmetric unit. Four heavy atom derivatives were prepared using a mother liquor containing 1.4 mol@L-1 Li2SO4 and 0.1 mol@L-1 MOPS buffer (pH7.2) and used to solve the protein's diffraction phase. The heavy atom binding sites in the derivative crystals were determined using difference Patterson and difference Fourier methods and were refined in combination to yield the initial protein's structure phase at 0.25 nm resolution. The non-crystallographic symmetryrelationship of the three independent protein molecules in the asymmetric unit was determined using the correlative heavy atom sites and used for the averagingof the initial electron density. As a result, the electron density was significantly improved, providing a solid foundation for subsequent structure determination.
Are National and Organizational Cultures Isomorphic? Evidence from a Four Country Comparative Study
Rune Ellemose Gulev
2009-09-01
Full Text Available This pilot study investigates whether organizational practices as observed through differing organizational cultures systematically replicate or reject national values. It is among the first to project delineated, narrow national cultural portrayals of Germany, Austria, Slovenia and Denmark against pattern-specific organizational cultures. Through country cluster analysis and correlation tests, the results achieve significance along all three dimensions. Trust allocations, authority perceptions and independence assertions were significant predictors for organizational traits of knowledge sharing practices, structure and control utilization, respectively. This demonstrates the value of assessing national values in conjunction with organizational culture in order to further understand the origins of corporate behaviour and the mechanisms that can help promote organizational effectiveness.
A Generative Approach to the Modeling of Isomorphic Hidden-Figure Items.
Bejar, Isaac I.; Yocom, Peter
1991-01-01
An approach to test modeling is illustrated that encompasses both response consistency and response difficulty. This generative approach makes validation an ongoing process. An analysis of hidden figure items with 60 high school students supports the feasibility of the method. (SLD)
Mapping Out the Territory: Beyond Isomorphs and Metaphors in Adventure Based Programmes.
Pinkard, John
1996-01-01
Custom mapping, an experiential learning strategy used in adventure education, provides a general metaphoric activity and then requires the group to customize it into their own "meta-map." This approach encourages collaboration, gives the group a high degree of autonomy in developing creative solutions, and has the potential to generate…
Synthesis and Characterization of Th2N2(NH) Isomorphous to Th2N3
Silva, G W Chinthaka M [ORNL; Yeamans, Charles B. [University of California, Berkeley; Hunn, John D [ORNL; Sattelberger, Alfred P [Argonne National Laboratory (ANL); Czerwinski, Ken R. [University of Nevada, Las Vegas; Weck, Dr. Phil F [University of Nevada, Las Vegas
2012-01-01
Using a new, low-temperature, fluoride-based process, thorium nitride imide of the chemical formula Th{sub 2}N{sub 2}(NH) was synthesized from thorium dioxide via an ammonium thorium fluoride intermediate. The resulting product phase was characterized by powder X-ray diffraction (XRD) analysis and was found to be crystallographically similar to Th{sub 2}N{sub 3}. Its unit cell was hexagonal with a space group of P3m{bar 1} and lattice parameters of a = b = 3.886(1) and c = 6.185(2) {angstrom}. The presence of -NH in the nitride phase was verified by Fourier transform infrared spectroscopy (FTIR). Total energy calculations performed using all-electron scalar relativistic density functional theory (DFT) showed that the hydrogen atom in the Th{sub 2}N{sub 2}(NH) prefers to bond with nitrogen atoms occupying 1a Wyckoff positions of the unit cell. Lattice fringe disruptions observed in nanoparticle areas of the nitride species by high-resolution transmission electron microscopic (HRTEM) images also displayed some evidence for the presence of -NH group. As ThO{sub 2} was identified as an impurity, possible reaction mechanisms involving its formation are discussed.
The proposal of improved inexact isomorphic graph algorithm to detect design patterns
Ba-Brahem, Afnan Salem; Qureshi, M. Rizwan Jameel
2014-01-01
Design patterns being applied more and more to solve the software engineering difficulties in the object oriented software design procedures. So, the design pattern detection is widely used by software industries. Currently, many solutions presented to detect the design pattern in the system design. In this paper, we will propose a new one which first; we will use the graph implementation to implement both the system design UML diagram and the design pattern UML diagram. Second, we will imple...
Kochman, Michał A; Pola, Martina; Miller, R J Dwayne
2016-08-11
Paving the way for the application of the algebraic-diagrammatic construction scheme of second-order (ADC(2)) to systems based on the guanine chromophore, we demonstrate the this excited-state electronic structure method provides a realistic description of the photochemistry of 9H-guanine, in close agreement with the benchmark provided by the CASPT2 method. We then proceed to apply the ADC(2) method to the photochemistry of 8-vinylguanine (8vG), a minimally modified analogue of guanine which, unlike the naturally occurring nucleobase, displays intense fluorescence, indicative of a much longer-lived excited electronic state. The emissive electronic state of 8vG is identified as an ππ*-type intramolecular charge transfer (ICT) state, in which a charge of roughly -0.2 e is transferred from the guanine moiety onto the vinyl substituent. The main radiationless deactivation pathway competing with fluorescence is predicted to involve the molecule leaving the minimum on the ICT ππ* state, and reaching a region of the S1 adiabatic state where it resembles the La ππ* state of unmodified 9H-guanine. The topology of the La ππ* region of the S1 state favors subsequent internal conversion at a crossing seam with the ground electronic state. The sensitivity of this process to environment polarity may explain the experimentally observed fluorescence quenching of 8vG upon incorporation in single- and double-stranded DNA.
A rapid and rational approach to generating isomorphous heavy-atom phasing derivatives.
Lu, Jinghua; Sun, Peter D
2014-09-01
In attempts to replace the conventional trial-and-error heavy-atom derivative search method with a rational approach, we previously defined heavy metal compound reactivity against peptide ligands. Here, we assembled a composite pH- and buffer-dependent peptide reactivity profile for each heavy metal compound to guide rational heavy-atom derivative search. When knowledge of the best-reacting heavy-atom compound is combined with mass spectrometry assisted derivatization, and with a quick-soak method to optimize phasing, it is likely that the traditional heavy-atom compounds could meet the demand of modern high-throughput X-ray crystallography. As an example, we applied this rational heavy-atom phasing approach to determine a previously unknown mouse serum amyloid A2 crystal structure.
Isomorphism and solid solution as shown by an accurate high-resolution diffraction experiment.
Poulain, Agnieszka; Kubicki, Maciej; Lecomte, Claude
2014-12-01
High-resolution crystal structure determination and spherical and multipolar refinement enabled an organic solid solution of 1-(4'-chlorophenyl)-2-methyl-4-nitro-1H-imidazole-5-carbonitrile and 5-bromo-1-(4'-chlorophenyl)-2-methyl-4-nitro-1H-imidazole to be found, which would not normally be revealed using only standard resolution data (ca 0.8 Å), as the disordered part is only visible at high resolution. Therefore, this new structure would have been reported as just another polymorphic form, even more reasonably as isostructural with other derivatives. To the best of our knowledge this is the first example of organic solid solution modelled via charge density Hansen-Coppens formalism and analysed by means of quantum theory of atoms in molecules (QTAIM) theory.
The role of isomorphous substitutions in natural selenides belonging to the pyrite group
Bindi, Luca [Museo di Storia Naturale, sez. di Mineralogia e Litologia, Universita degli Studi di Firenze, via La Pira 4, I-50121 Firenze (Italy)], E-mail: luca.bindi@unifi.it; Cipriani, Curzio [Museo di Storia Naturale, sez. di Mineralogia e Litologia, Universita degli Studi di Firenze, via La Pira 4, I-50121 Firenze (Italy); Pratesi, Giovanni [Museo di Storia Naturale, sez. di Mineralogia e Litologia, Universita degli Studi di Firenze, via La Pira 4, I-50121 Firenze (Italy); Dipartimento di Scienze della Terra, Universita degli Studi di Firenze, via La Pira 4, I-50121 Firenze (Italy); Trosti-Ferroni, Renza [Dipartimento di Scienze della Terra, Universita degli Studi di Firenze, via La Pira 4, I-50121 Firenze (Italy)
2008-07-14
The present paper reports chemical and structural data of selenide minerals belonging to the pyrite group. Eighteen samples of minerals in this group with variable chemical composition (7 samples of penroseite, NiSe{sub 2}; 10 samples of krutaite, CuSe{sub 2}; 1 sample of trogtalite, CoSe{sub 2}) were studied by means of X-ray single-crystal diffraction and electron microprobe. On the basis of information gained from the chemical characterization, we can conclude that a complete solid solution between NiSe{sub 2} and CuSe{sub 2} exists in nature with the absence of pure end-members. Although verified only for the Ni-rich members, we also infer a solid solution between NiSe{sub 2} and CoSe{sub 2}. The unit-cell parameters were modeled using a multiple regression method as a function of the Co, Ni, and Cu contents.
Vasung, L; Jovanov-Milošević, N; Pletikos, M; Mori, S; Judaš, M; Kostović, Ivica
2011-01-01
Periventricular pathway (PVP) system of the developing human cerebrum is situated medial to the intermediate zone in the close proximity to proliferative cell compartments. In order to elucidate chemical properties and developing trajectories of the PVP we used DTI in combination with acetylcholinesterase histochemistry, SNAP-25 immunocytochemistry and axonal cytoskeletal markers (SMI312, MAP1b) immunocytochemistry on postmortem paraformaldehyde-fixed brains of 30 human fetuses ranging in age from 10 to 38 postconceptional weeks (PCW), 2 infants (age 1-3 months) and 1 adult brain. The PVP appears in the early fetal period (10-13 PCW) as two defined fibre bundles: the corpus callosum (CC) and the fetal fronto-occipital fascicle (FOF). In the midfetal period (15-18 PCW), all four components of the PVP can be identified: (1) the CC, which at rostral levels forms a voluminous callosal plate; (2) the FOF, with SNAP-25-positive fibers; (3) the fronto-pontine pathway (FPP) which for a short distance runs within the PVP; and (4) the subcallosal fascicle of Muratoff (SFM) which contains cortico-caudate projections. The PVPs are situated medial to the internal capsule at the level of the cortico-striatal junction; they remain prominent during the late fetal and early preterm period (19-28 PCW) and represent a portion of the wider periventricular crossroad of growing associative, callosal and projection pathways. In the perinatal period, the PVPs change their topographical relationships, decrease in size and the FOF looses its SNAP-25-reactivity. In conclusion, the hitherto undescribed PVP of the human fetal cerebrum contains forerunners of adult associative and projection pathways. Its transient chemical properties and relative exuberance suggest that the PVP may exert influence on the development of cortical connectivity (intermediate targeting) and other neurogenetic events such as neuronal proliferation. The PVP's topographical position also indicates that it is a major
... to learn. Search form Search Tests related to pregnancy You are here Home Testing & Services Testing for ... to Genetic Counseling . What Are Tests Related to Pregnancy? Pregnancy related testing is done before or during ...
Neutrosophic Relational Database Decomposition
Meena Arora
2011-08-01
Full Text Available In this paper we present a method of decomposing a neutrosophic database relation with Neutrosophic attributes into basic relational form. Our objective is capable of manipulating incomplete as well as inconsistent information. Fuzzy relation or vague relation can only handle incomplete information. Authors are taking the Neutrosophic Relational database [8],[2] to show how imprecise data can be handled in relational schema.
Relative entropy equals bulk relative entropy
Jafferis, Daniel L; Maldacena, Juan; Suh, S Josephine
2015-01-01
We consider the gravity dual of the modular Hamiltonian associated to a general subregion of a boundary theory. We use it to argue that the relative entropy of nearby states is given by the relative entropy in the bulk, to leading order in the bulk gravitational coupling. We also argue that the boundary modular flow is dual to the bulk modular flow in the entanglement wedge, with implications for entanglement wedge reconstruction.
Understanding Causal Coherence Relations
Mulder, G.
2008-01-01
The research reported in this dissertation focuses on the cognitive processes and representations involved in understanding causal coherence relations in text. Coherence relations are the meaning relations between the information units in the text, such as Cause-Consequence. These relations can be m
Lancaster, Jeanette Elizabeth
2013-01-01
A central feature of complexity is that it is based on non-linear, recursive relations. However, in most current accounts of complexity such relations, while non-linear, are based on the reductive relations of a Newtonian onto-epistemological framework. This means that the systems that are emergent from the workings of such relations are a…
Public Relations and Marketing.
Savage, Daniel D.
1987-01-01
Urges community colleges to adopt pro-active public relations strategies. Examines the role of the public information officer in such areas as coordination of public relations and marketing activities, relations with media, and the development of a comprehensive public relations plan. (AYC)
Smith, T. J.; Whelan, K.R.T.
2006-01-01
Mathematical relations that use easily measured variables to predict difficult-to-measure variables are important to resource managers. In this paper we develop allometric relations to predict total aboveground biomass and individual components of biomass (e.g., leaves, stems, branches) for three species of mangroves for Everglades National Park, Florida, USA. The Greater Everglades Ecosystem is currently the subject of a 7.8-billion-dollar restoration program sponsored by federal, state, and local agencies. Biomass and production of mangroves are being used as a measure of restoration success. A technique for rapid determination of biomass over large areas is required. We felled 32 mangrove trees and separated each plant into leaves, stems, branches, and for Rhizophora mangle L., prop roots. Wet weights were measured in the field and subsamples returned to the laboratory for determination of wet-to-dry weight conversion factors. The diameter at breast height (DBH) and stem height were also measured. Allometric equations were developed for each species for total biomass and components of biomass. We compared our equations with those from the same, or similar, species from elsewhere in the world. Our equations explained ???93% of the variance in total dry weight using DBH. DBH is a better predictor of dry weight than is stem height and DBH is much easier to measure. Furthermore, our results indicate that there are biogeographic differences in allometric relations between regions. For a given DBH, stems of all three species have less mass in Florida than stems from elsewhere in the world. ?? Springer 2006.
丁南庆
1994-01-01
The aim of this paper is to investigate relatively flat envelopes. A necessary and sufficient condition is given for a relatively-finitely presented module to have a (mono-morphic or epic) relatively flat envelope. Then those rings are characterized whose every relatively-finitely presented module has a relatively flat envelope which coincides with its in-jective envelope. Some known results are obtained as corollaries.
Introduction to relation algebras relation algebras
Givant, Steven
2017-01-01
The first volume of a pair that charts relation algebras from novice to expert level, this text offers a comprehensive grounding for readers new to the topic. Upon completing this introduction, mathematics students may delve into areas of active research by progressing to the second volume, Advanced Topics in Relation Algebras; computer scientists, philosophers, and beyond will be equipped to apply these tools in their own field. The careful presentation establishes first the arithmetic of relation algebras, providing ample motivation and examples, then proceeds primarily on the basis of algebraic constructions: subalgebras, homomorphisms, quotient algebras, and direct products. Each chapter ends with a historical section and a substantial number of exercises. The only formal prerequisite is a background in abstract algebra and some mathematical maturity, though the reader will also benefit from familiarity with Boolean algebra and naïve set theory. The measured pace and outstanding clarity are particularly ...
Probability and Relative Frequency
Drieschner, Michael
2016-01-01
The concept of probability seems to have been inexplicable since its invention in the seventeenth century. In its use in science, probability is closely related with relative frequency. So the task seems to be interpreting that relation. In this paper, we start with predicted relative frequency and show that its structure is the same as that of probability. I propose to call that the `prediction interpretation' of probability. The consequences of that definition are discussed. The "ladder"-structure of the probability calculus is analyzed. The expectation of the relative frequency is shown to be equal to the predicted relative frequency. Probability is shown to be the most general empirically testable prediction.
Big data related technologies, challenges and future prospects
Chen, Min; Zhang, Yin; Leung, Victor CM
2014-01-01
This Springer Brief provides a comprehensive overview of the background and recent developments of big data. The value chain of big data is divided into four phases: data generation, data acquisition, data storage and data analysis. For each phase, the book introduces the general background, discusses technical challenges and reviews the latest advances. Technologies under discussion include cloud computing, Internet of Things, data centers, Hadoop and more. The authors also explore several representative applications of big data such as enterprise management, online social networks, healthcar
Zhu, Junqing; Zhou, Yi; Chen, Xiaoguang; Li, Juan
2014-07-01
An inconsistent association has been reported between the serum anticitrullinated protein antibodies (ACPA) level and rheumatoid arthritis (RA)-related pulmonary disease risk. We conducted a metaanalysis to reveal the association between them. An electronic search was performed in PubMed, ScienceDirect, and SpringerLink databases for studies published up to August 2013. The distributions of the serum ACPA level in cases and controls were obtained from eligible studies. The risk of RA-related pulmonary disease associated with serum ACPA positivity was estimated by OR and 95% CI. According to the heterogeneity results, a fixed-effects model or a random-effects model was used to calculate the pooled OR. Publication bias and sensitivity analyses were conducted. Overall, 243 patients with RA-related pulmonary disease and 1442 RA controls were included in the metaanalysis. The results showed that the pooled OR was 2.621 (95% CI, 1.561-4.403, p < 0.001) for the increased risk of RA-related pulmonary disease due to the serum ACPA positivity. In the white population subgroup, an increased OR was 3.453 (95% CI 1.798-6.630, p < 0.001), whereas no association was found in the Asian population subgroup. Additionally, we further revealed that serum ACPA positivity indicated a higher risk for interstitial lung disease (ILD) and interstitial pulmonary fibrosis (IPF) among patients with RA (OR 4.679, 95% CI 2.071-10.572, p < 0.001). The heterogeneity, publication bias, and sensitivity analyses had no statistical significance in any group. To our knowledge, this is the first metaanalysis to reveal that serum ACPA positivity is highly associated with the risk of RA-related pulmonary disease, particularly in RA-related ILD and IPF.
Pinkham, Chester A.; Barrett, Kristin Burrows
1992-01-01
Describes four experiments that enable students to explore the phenomena of evaporation and condensation and determine the relative humidity by measuring air temperature and dew point on warm September days. Provides tables to calculate saturation points and relative humidity. (MDH)
Gardner, Martin
2012-01-01
Since the publication of Einstein's Special Theory of Relativity in 1905, the discovery of such astronomical phenomena as quasars, pulsars, and black holes - all intimately connected to relativity - has provoked a tremendous upsurge of interest in the subject. This volume, a revised version of Martin Gardner's earlier Relativity for the Million, brings this fascinating topic up to date. Witty, perceptive, and easily accessible to the general reader, it is one of the clearest and most entertaining introductions to relativity ever written.
Molecular nanomagnets and related phenomena
Gao, Song (ed.) [Peking Univ., Beijing (China). College of Chemistry and Molecular Engineering
2015-07-01
the individual volumes are invited by the volume editors. Readership: research scientists at universities or in industry, graduate students Special offer for all customers who have a standing order to the print version of Structure and Bonding, we offer free access to the electronic volumes of the Series published in the current year via SpringerLink.
Kersting, Kristian; van Otterlo, M.; De Raedt, Luc; Greiner, R.; Schuurmans, D.
2004-01-01
Motivated by the interest in relational reinforcement learning, we introduce a novel relational Bellman update operator called ReBel. It employs a constraint logic programming language to compactly represent Markov decision processes over relational domains. Using ReBel, a novel value iteration
Kaufmann, William J
1973-01-01
The foundations of gravitational theory ; the birth of relativity theory ; the foundations of general relativity ; experimental tests of relativity ; the meaning of the redshift ; the black hole ; wormholes and white holes ; galaxies and quasars ; gravitational waves ; the shape of the Universe ; the creation of the Universe.
Beauquier, Maxime; Schürmann, Carsten
2011-01-01
In this paper, we present a model based on relations for bigraphical reactive system [Milner09]. Its defining characteristics are that validity and reaction relations are captured as traces in a multi-set rewriting system. The relational model is derived from Milner's graphical definition...
Geometry of Müntz spaces and related questions
Gurariy, Vladimir
2005-01-01
Starting point and motivation for this volume is the classical Muentz theorem which states that the space of all polynomials on the unit interval, whose exponents have too many gaps, is no longer dense in the space of all continuous functions. The resulting spaces of Muentz polynomials are largely unexplored as far as the Banach space geometry is concerned and deserve the attention that the authors arouse. They present the known theorems and prove new results concerning, for example, the isomorphic and isometric classification and the existence of bases in these spaces. Moreover they state many open problems. Although the viewpoint is that of the geometry of Banach spaces they only assume that the reader is familiar with basic functional analysis. In the first part of the book the Banach spaces notions are systematically introduced and are later on applied for Muentz spaces. They include the opening and inclination of subspaces, bases and bounded approximation properties and versions of universality.
Decreasing Relative Risk Premium
Hansen, Frank
We consider the risk premium demanded by a decision maker with wealth x in order to be indifferent between obtaining a new level of wealth y1 with certainty, or to participate in a lottery which either results in unchanged present wealth or a level of wealth y2 > y1. We define the relative risk...... premium as the quotient between the risk premium and the increase in wealth y1–x which the decision maker puts on the line by choosing the lottery in place of receiving y1 with certainty. We study preferences such that the relative risk premium is a decreasing function of present wealth, and we determine...... relative risk premium in the small implies decreasing relative risk premium in the large, and decreasing relative risk premium everywhere implies risk aversion. We finally show that preferences with decreasing relative risk premium may be equivalently expressed in terms of certain preferences on risky...
Decreasing relative risk premium
Hansen, Frank
2007-01-01
such that the corresponding relative risk premium is a decreasing function of present wealth, and we determine the set of associated utility functions. We find a new characterization of risk vulnerability and determine a large set of utility functions, closed under summation and composition, which are both risk vulnerable...... and have decreasing relative risk premium. We finally introduce the notion of partial risk neutral preferences on binary lotteries and show that partial risk neutrality is equivalent to preferences with decreasing relative risk premium...
Gaining Relational Competitive Advantages
Hu, Yimei; Zhang, Si; Li, Jizhen
2015-01-01
Establishing strategic technological partnerships (STPs) with foreign partners is an increasingly studied topic within the innovation management literature. Partnering firms can jointly create sources of relational competitive advantage. Chinese firms often lack research and development (R......&D) capabilities but are increasingly becoming preferred technological partners for transnational corporations. We investigate an STP between a Scandinavian and a Chinese firm and try to explore how to gain relational competitive advantage by focusing on its two essential stages: relational rent generation...
T. (A)LVAREZ
2012-01-01
For a closed linear relation in a Banach space the concept of regularity is introduced and studied.It is shown that many of the results of Mbekhta and other authors for operators remain valid in the context of multivalued linear operators.We also extend the punctured neighbourhood theorem for operators to linear relations and as an application we obtain a characterization of semiFredholm linear relations which are regular.
Akehurst, David H.
2004-01-01
OCL is proposed as a query language within the QVT framework. The main QVT submission bases the specification of transformations on the concept of relations. Relations are not first class entities within the OCL. By extending OCL with the concept of Relations it can better serve the needs of the QVT framework. In particular this enables OCL to be used as a semantic interpretation of a QVT transformation language and may even facilitate the use of OCL as a transformation specification language.
Relative Smooth Topological Spaces
B. Ghazanfari
2009-01-01
Full Text Available In 1992, Ramadan introduced the concept of a smooth topological space and relativeness between smooth topological space and fuzzy topological space in Chang's (1968 view points. In this paper we give a new definition of smooth topological space. This definition can be considered as a generalization of the smooth topological space which was given by Ramadan. Some general properties such as relative smooth continuity and relative smooth compactness are studied.
Observing power blackouts from space - A disaster related study
Aubrecht, C.; Elvidge, C. D.; Ziskin, D.; Baugh, K. E.; Tuttle, B.; Erwin, E.; Kerle, N.
2009-04-01
world. Elvidge et al. (1998) first demonstrated that under certain conditions a detection of power outages is possible using OLS data. A standard procedure for visual detection of power outages has been developed. The procedure is based on identifying locations where consistently observed lighting is missing or reduced following a disaster event. Visible and thermal spectral bands of the event-related OLS data are compared to a recent cloud-free composite of nighttime lights by producing a color (RGB) composite image. For the cloud-free nighttime lights composite serving as reference information both monthly and annual composites can be used, depending on the respective availability and suitability of OLS data. The RGB color composite uses the reference lights as red (R), the current visible band as green (G) and the current thermal band as blue (B). The thermal band is typically inverted to make clouds appear bright. As clouds are typically colder than the surface of the Earth, in the thermal band higher values are observed on cloud-free areas, which thus appear brighter in standard visualization modes. The resulting color composite is visually interpreted to identify power outages, which show up as red lights on a dark (cloud-free) background. Red color stands for high values in the reference data (red band of the RGB composite) compared to low values in the event data (green and blue bands of the RGB composite), thus showing the disaster-related absence or reduction of lighting. Heavy cloud cover also obscures lights, resulting in red lights on a blue background. Yellow color in the RGB composite indicates areas where the lights are on, i.e. both red and green band (reference composite and visible band of the event image) feature high values with no cloud cover present (low values in the blue band). Under ideal conditions the presented procedure detects individual cities and towns where power has been lost or has been reduced. Conditions reducing or eliminating the
Optimal Universal Uncertainty Relations
Li, Tao; Xiao, Yunlong; Ma, Teng; Fei, Shao-Ming; Jing, Naihuan; Li-Jost, Xianqing; Wang, Zhi-Xi
2016-01-01
We study universal uncertainty relations and present a method called joint probability distribution diagram to improve the majorization bounds constructed independently in [Phys. Rev. Lett. 111, 230401 (2013)] and [J. Phys. A. 46, 272002 (2013)]. The results give rise to state independent uncertainty relations satisfied by any nonnegative Schur-concave functions. On the other hand, a remarkable recent result of entropic uncertainty relation is the direct-sum majorization relation. In this paper, we illustrate our bounds by showing how they provide a complement to that in [Phys. Rev. A. 89, 052115 (2014)]. PMID:27775010
Booth, Alan; Edwards, John N.
1976-01-01
The effect of household and neighborhood crowding on the relations between spouses, those between parents and children, and the relations among children are examined; a sample of urban families residing in conditions ranging from open to highly compressed provided the data for the investigation and multiple regression was used to analyze the…
Relational Perspectives on Leading
Larsen, Mette Vinther; Rasmussen, Jørgen Gulddahl
2015-01-01
Relational Perspectives on Leading discusses leadership from a relational and social constructionism perspective as practiced on an everyday basis between people. The book pursues a fast growing, practice-based approach - particularly within the Anglo-Saxon parts of the world - to organization...... studies and organizational phenomena....
Ridgely, Charles T.
2010-01-01
Many textbooks dealing with general relativity do not demonstrate the derivation of forces in enough detail. The analyses presented herein demonstrate straightforward methods for computing forces by way of general relativity. Covariant divergence of the stress-energy-momentum tensor is used to derive a general expression of the force experienced…
Braeken, Johan; Mulder, Joris; Wood, Stephen
2015-01-01
Assessing the relative importance of predictors has been of historical importance in a variety of disciplines including management, medicine, economics, and psychology. When approaching hypotheses on the relative ordering of the magnitude of predicted effects (e.g., the effects of discrimination
Relational Processing Following Stroke
Andrews, Glenda; Halford, Graeme S.; Shum, David; Maujean, Annick; Chappell, Mark; Birney, Damian
2013-01-01
The research examined relational processing following stroke. Stroke patients (14 with frontal, 30 with non-frontal lesions) and 41 matched controls completed four relational processing tasks: sentence comprehension, Latin square matrix completion, modified Dimensional Change Card Sorting, and n-back. Each task included items at two or three…
Measuring Relational Reasoning
Alexander, Patricia A.; Dumas, Denis; Grossnickle, Emily M.; List, Alexandra; Firetto, Carla M.
2016-01-01
Relational reasoning is the foundational cognitive ability to discern meaningful patterns within an informational stream, but its reliable and valid measurement remains problematic. In this investigation, the measurement of relational reasoning unfolded in three stages. Stage 1 entailed the establishment of a research-based conceptualization of…
Teaching Mediated Public Relations.
Kent, Michael L.
2001-01-01
Discusses approaches to teaching a mediated public relations course, emphasizing the World Wide Web. Outlines five course objectives, assignments and activities, evaluation, texts, and lecture topics. Argues that students mastering these course objectives will understand ethical issues relating to media use, using mediated technology in public…
Ridgely, Charles T.
2010-01-01
Many textbooks dealing with general relativity do not demonstrate the derivation of forces in enough detail. The analyses presented herein demonstrate straightforward methods for computing forces by way of general relativity. Covariant divergence of the stress-energy-momentum tensor is used to derive a general expression of the force experienced…
Singh, Satya Pal; Singh, Apoorva; Hareet, Prabhav
2011-01-01
The progress of modern cosmology took off in 1917 when A. Einstein published his paper on general theory of relativity extending his work of special theory of relativity (1905). In 1922 Alexander Friedmann constructed a mathematical model for expanding Universe that had a big bang in remote past. The experimental evidences could come in 1929 by…
Proctor and Gamble Co., Cincinnati, OH.
This guide was especially designed for home economists and includes 50 pages of practical ideas and examples on how to set public relations objectives, determine target audiences, work with the media, write releases' and prepare for broadcast interviews. The guide includes definitions of basic terms used in public relations, establishes guidelines…
Shelby, Annette N.
Public relations as strategic communication is one possible theme for an introductory course in public relations. This perspective focuses attention on messages (their content, timing, media, and so forth) as strategic responses to the audience and the situation. It provides a defensible rationale for including certain relevant topics in the…
Jensen de López, Kristine M.; Sundahl Olsen, Lone; Chondrigianni, V.
2014-01-01
This study examines the comprehension and production of subject and object relative clauses (SRCs, ORCs) by children with Specific Language Impairment (SLI) and their typically developing (TD) peers. The purpose is to investigate whether relative clauses are problematic for Danish children with SLI...
Elaborating Public Relations Roles.
Leichty, Greg; Springston, Jeff
1996-01-01
Investigates the structure of public relations roles. Factor analyzes G. Broom and G. Smith's role questionnaire in conjunction with items used in organizational boundary spanning. Extracts eight activity factors. Identifies four primary practitioner roles and one minor role. Refines previous public relations roles concepts. Shows by validation…
Nakamori, Takayuki
2002-01-01
Discusses the advantages and disadvantages of what has become the standard approach to teaching relative clauses. To overcome the disadvantages, proposes a hierarchical teaching method that begins by introducing noun phrases that contain relative clauses before comparing them with similar structures in the learner's first language. Shows an…
Korneliussen, Thorfinn Sand; Moltke, Ida
2015-01-01
. Using both simulated and real data, we show that NgsRelate provides markedly better estimates for low-depth NGS data than two state-of-the-art genotype-based methods. AVAILABILITY: NgsRelate is implemented in C++ and is available under the GNU license at www.pop gen.dk/software. CONTACT: ida...
Blaagaard, Bolette
of the self-other relation which is simultaneously personal and political. Secondly, the dissertation relates the phenomenological ‘race’ and gender debates to the societal and productive context of contemporary European and ‘western’ globalised and mediated culture and politics. Journalism is re...... accountability and relation from journalistic training and practices whereby a ‘white’ and homogeneous social imaginary is reproduced. I make a call for thinking about journalism as relation – in terms of technological mediations, but also in terms of subjectivities. In order to allow for this, a shift is needed...... of cosmopolitanism from universal reproductions of sameness into creative productions of singular self-other relations based on the practiced and productive journalism. This is substantiated through case study analyses. The aim is to challenge the modern, rational journalistic subject referring back to the unified...
Relative Lyapunov Center Bifurcations
Wulff, Claudia; Schilder, Frank
2014-01-01
Relative equilibria (REs) and relative periodic orbits (RPOs) are ubiquitous in symmetric Hamiltonian systems and occur, for example, in celestial mechanics, molecular dynamics, and rigid body motion. REs are equilibria, and RPOs are periodic orbits of the symmetry reduced system. Relative Lyapunov...... center bifurcations are bifurcations of RPOs from REs corresponding to Lyapunov center bifurcations of the symmetry reduced dynamics. In this paper we first prove a relative Lyapunov center theorem by combining recent results on the persistence of RPOs in Hamiltonian systems with a symmetric Lyapunov...... center theorem of Montaldi, Roberts, and Stewart. We then develop numerical methods for the detection of relative Lyapunov center bifurcations along branches of RPOs and for their computation. We apply our methods to Lagrangian REs of the N-body problem....
Bojowald, Martin
2013-01-01
Deformed special relativity is embedded in deformed general relativity using the methods of canonical relativity and loop quantum gravity. Phase-space dependent deformations of symmetry algebras then appear, which in some regimes can be rewritten as non-linear Poincare algebras with momentum-dependent deformations of commutators between boosts and time translations. In contrast to deformed special relativity, the deformations are derived for generators with an unambiguous physical role, following from the relationship between canonical constraints of gravity with stress-energy components. The original deformation does not appear in momentum space and does not give rise to non-locality issues or problems with macroscopic objects. Contact with deformed special relativity may help to test loop quantum gravity or restrict its quantization ambiguities.
Scheuer, Steen
2014-01-01
Human Relations-skolen er en samlebetegnelse for to forskningsretninger, som tilsammen bidrog som nogle af de første til at indkredse og belyse de mellemmenneskelige relationers betydning for motivation og trivsel i arbejdslivet, og som skulle få stor ind"ydelse ikke bare på organisationsteorien......, som formulerede en række teorier og modeller om menneskets motivation, trivsel og behov i arbejdslivet. Selvom de ikke nødvendigvis relaterede sig til hinandens arbejde, er de forskellige bidragsydere i dag kendt som repræsentanter for den paradigmatiske betegnelse Human Relations. Undertiden skelnes...... der mellem Human Relations (Hawthorne-eksperimenter ne) og Neo-Human Relations (behovsteorierne), men i denne fremstilling bruges Human Relations som en samlebetegnelse for begge disse – noget forskellige – forskningstraditioner. De har i dag opnået stor udbredelse og er praktisk talt obligatorisk...
Holographic Special Relativity
Wise, Derek K
2013-01-01
We reinterpret special relativity, or more precisely its de Sitter deformation, in terms of 3d conformal geometry, as opposed to (3+1)d spacetime geometry. An inertial observer, usually described by a geodesic in spacetime, becomes instead a choice of ways to reverse the conformal compactification of a Euclidean vector space up to scale. The observer's "current time," usually given by a point along the geodesic, corresponds to the choice of scale in the decompactification. We also show how arbitrary conformal 3-geometries give rise to "observer space geometries," as defined in recent work, from which spacetime can be reconstructed under certain integrability conditions. We conjecture a relationship between this kind of "holographic relativity" and the "shape dynamics" proposal of Barbour and collaborators, in which conformal space takes the place of spacetime in general relativity. We also briefly survey related pictures of observer space, including the AdS analog and a representation related to twistor theor...
General relativity and cosmology
Bucher, Martin
2015-01-01
This year marks the hundredth anniversary of Einstein's 1915 landmark paper "Die Feldgleichungen der Gravitation" in which the field equations of general relativity were correctly formulated for the first time, thus rendering general relativity a complete theory. Over the subsequent hundred years physicists and astronomers have struggled with uncovering the consequences and applications of these equations. This contribution, which was written as an introduction to six chapters dealing with the connection between general relativity and cosmology that will appear in the two-volume book "One Hundred Years of General Relativity: From Genesis and Empirical Foundations to Gravitational Waves, Cosmology and Quantum Gravity," endeavors to provide a historical overview of the connection between general relativity and cosmology, two areas whose development has been closely intertwined.
Non-Invasive Ultrasonic Diagnosing and Monitoring of Intracranial Pressure/Volume
2001-10-01
related to cardiovascular parameters. ICP VI, Eds. Miller JD, Teasdale GM, Rowan JO, Galbraith SL, Mendelow AD. Springer-Verlag Berlin Heidelberg, 290...Galbraith AD Mendelow (Springer Berlin Heidelberg) 305-309 43. Hayashi M, Handa Y, Kobayashi H, Kawano H, Ishii H, Hirose S (1991). Plateau-wave...Galbraith SL, Mendelow AD Springer-Verlag Berlin Heidelberg. 151-155 72. Maeda M, Tanaka K, Nishimur S, Matsuura S (1986). Pressure wave-like changes in
Modernization of credit relations
S.V. Volosovich
2015-03-01
Full Text Available Nowadays it is essential to modernize credit relations in the conditions of global economy transformations. This is due to the influence of integration processes on credit relations and transformation of the risks inherent in the credit field. The purpose of this article is to develop measures that help to improve the efficiency of interaction of credit relations’ participants. Modernization of credit relations is based on the interaction of its main and indirect subjects who belong to the subsystems of loans granting, deposits attraction and provision of related services. Its goal is to pass from extensive to intensive model of interaction between the subjects of credit relations. Components of the credit relations modernization are the following: institutional modernization, which is based on the interaction of credit relations’ subjects, and ensures the development of competition in all credit market’s segments, the creation of its corresponding infrastructure, qualitative change in the approaches of regulation and supervision; technological modernization, which involves the formation of joint products on the credit market and the formation of an integrated informational and analytical system. In the result of the credit relations’ modernization it is expected to achieve synergies between the subjects of credit relations, that will lead to changes in the business architecture of the financial market.
Hyper-Raman spectroscopy of Earth related materials
Hellwig, H.
2004-12-01
conventional Raman and hyper-Raman are complimentary. In many cases the combined information of both techniques can reveal all the vibrational information of a material. This information can be used to calculate thermodynamic properties, to identify mineral phases ('finger-printing'), or to investigate the dynamics related to phase transitions ('soft-modes'). First results on planetary materials will be presented, including MgO and stichovite. Corundum as another possible high pressure transmitting material is characterized as well. Further measurements are underway, including MgSiO3 and CaSiO3 perovskite. [1] A. M. Hofmeister, in: Infrared Spectroscopy in Geochemistry, Exploration Geochemistry, and Remote Sensing, Vol. 33 (ed. P. K. King, M. S. Ramsey, and G. A. Swayze), Mineralogical Society of Canada (2004) [2] P. F. McMillan, R. J. Hemley, and P. Gillet, in : Mineral Spectroscopy: A Tribute to Roger G. Burns, Vol. 5 (ed. D. Dyar, C. McCammon, and M. W. Schaefer), The Geochemical Society Special Publication (1996). [3] H. Vogt, in: Topics in Applied Physics, Vol. 50, Light scattering in solids II (ed. M. Cardonna and G. Guentherodt), Springer-Verlag, Heidelberg, New York (1982).
Bibliography of Documents Related to the Theory, Operation and Performance of Coaxial Plasma Guns
1988-09-01
J. and Rodriguez- Trelles , "Recent Plasma Focus Research," in Proceedings of the Seventh International Conference on Plasma Physics and Controlled...pp. 512-525, Howard, R. (editor), Springer-Verlag, New York, NY, 1971. 29 Bostick, W. H., Nardi, V., Prior, W. J. and Rodriguez- Trelles , F., "On the...Physics, Vol. 8, Part 1, August 1972, pp. 7-20. Bostick, W. H., Nardi, V., Prior, W. and Rodriquez- Trelles , F., "Intensity Anisotropy and Fine Structure
Kilmister, Clive William
1970-01-01
Special Theory of Relativity provides a discussion of the special theory of relativity. Special relativity is not, like other scientific theories, a statement about the matter that forms the physical world, but has the form of a condition that the explicit physical theories must satisfy. It is thus a form of description, playing to some extent the role of the grammar of physics, prescribing which combinations of theoretical statements are admissible as descriptions of the physical world. Thus, to describe it, one needs also to describe those specific theories and to say how much they are limit
Korneliussen, Thorfinn Sand; Moltke, Ida
2015-01-01
be called with high certainty. RESULTS: We present a software tool, NgsRelate, for estimating pairwise relatedness from NGS data. It provides maximum likelihood estimates that are based on genotype likelihoods instead of genotypes and thereby takes the inherent uncertainty of the genotypes into account....... Using both simulated and real data, we show that NgsRelate provides markedly better estimates for low-depth NGS data than two state-of-the-art genotype-based methods. AVAILABILITY: NgsRelate is implemented in C++ and is available under the GNU license at www.pop gen.dk/software. CONTACT: ida...
Chou, C. W.; Hume, D. B.; Rosenband, T.; Wineland, D. J.
2010-09-01
Observers in relative motion or at different gravitational potentials measure disparate clock rates. These predictions of relativity have previously been observed with atomic clocks at high velocities and with large changes in elevation. We observed time dilation from relative speeds of less than 10 meters per second by comparing two optical atomic clocks connected by a 75-meter length of optical fiber. We can now also detect time dilation due to a change in height near Earth’s surface of less than 1 meter. This technique may be extended to the field of geodesy, with applications in geophysics and hydrology as well as in space-based tests of fundamental physics.
Coriolan PĂUNESCU
2006-10-01
Full Text Available Research has an important role in public relations (PR being necessary in developing strategies in this area. Therefore, we can speak oftwo types of research, the applied research and theoretical research, both being successfully used in the work of public relations. Applied research,can be strategic (used in programs in order to identify attitudes and opinions of the target public, to develop strategies for formulating andtransmitting messages, to establish the criteria for evaluating the work and evaluative by which it determines the communication efficiency, incarrying out the program of public relations (in fact it is the comparison between the established and achieved objectives.
Hoffmann, William F
1964-01-01
Remarks on the observational basis of general relativity ; Riemannian geometry ; gravitation as geometry ; gravitational waves ; Mach's principle and experiments on mass anisotropy ; the many faces of Mach ; the significance for the solar system of time-varying gravitation ; relativity principles and the role of coordinates in physics ; the superdense star and the critical nucleon number ; gravitation and light ; possible effects on the solar system of φ waves if they exist ; the Lyttleton-Bondi universe and charge equality ; quantization of general relativity ; Mach's principle as boundary condition for Einstein's equations.