bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Behaviour of Elastic Fields and Boundary Integral Mellin Techniques Near Conical Points
Authors: Kozlov V. , Wendland W. L. , Goldberg H. 
Published: July 2010

AbstractFor the computation of the local singular behaviour of an homogeneous anisotropic clastic field near the three‐dimensional vertex subjected to displacement boundary conditions, one can use a boundary integral equation of the first kind whose unkown is the boundary stress. Mellin transformation yields a one ‐ dimensional integral equation on the intersection curve 7 of the cone with the unit sphere. The Mellin transformed operator defines the singular exponents and Jordan chains, which provide via inverse Mellin transformation a local expansion of the solution near the vertex. Based on Kondratiev's technique which yields a holomorphic operator pencil of elliptic boundary value problems on the cross ‐ sectional interior and exterior intersection of the unit sphere with the conical interior and exterior original cones, respectively, and using results by Maz'ya and Kozlov, it can be shown how the Jordan chains of the one‐dimensional boundary integral equation are related to the corresponding Jordan chains of the operator pencil and their jumps across γ. This allows a new and detailed analysis of the asymptotic behaviour of the boundary integral equation solutions near the vertex of the cone. In particular, the integral equation method developed by Schmitz, Volk and Wendland for the special case of the elastic Dirichlet problem in isotropic homogeneous materials could be completed and generalized to the anisotropic case.
Continuous Linear Right Inverses for Partial Differential Operators on Non ‐ Quasianalytic Classes and on Ultradistributions
Authors: Meise Reinhold , Taylor B. Alan , Vogt Dietmar 
Published: July 2010

AbstractCharacterizations are given of those linear partial differential operators with constant coefficients which admit a continuous linear right inverse on ε(ω()ω) )resp. ε[ω](Ω) and/or D′(ω)(Ω) (resp. D′[ω](Ω), where Ω is an open set in ℝn. The characterisations are in the same spirit as in the previous results of the authors on the existence of right inverses on C∞ and/or D′(Ω).
On Iterations of the Green Integrals and their Applications to Elliptic Differential Complexes
Authors: Nacinovich Mauro , Shlapunov Alexandre 
Published: July 2010

AbstractConvergence of iterations of special Green integrals for overdetermined elliptic linear partial differential operatorsPof order p ≥ 1 is proved. Using this result we obtain necessary and sufficient conditions for the solvability of the equationPu=fin the Sobolev space Wp,2(D) and, as a corollary, necessary and sufficient conditions for the vanishing of the first cohomology group of elliptic differential complexes. Also a criterion for the solvability of aP‐Neumann problem for elliptic differential operators is proved.
Discretization of a Random Dynamical System near a Hyperbolic Point
Authors: Arnold Ludwig , Kloeden Peter 
Published: July 2010

AbstractA result of Beyn on the replication of the phase portrait of an ordinary differential equation in the neighborhood of a hyperbolic steady state by a one‐step numerical method is generalized under appropriate assumptions to random differential equations with hyperbolicity defined in terms of the multiplicative ergodic theorem of Oseledets. The proof is complicated by the need to compare cocycles rather than underlying vector fields and the use of random norms to obtain uniform estimates. As an example we consider small random perturbations of a linear ordinary differential equation with a hyperbolic null solution.
Necessary and Sufficient Convexity Conditions for the Ranges of Vector Measures
Authors: Herschbach Rudolf 
Published: July 2010

AbstractThe absence of atoms in Lyapunov's Convexity Theorem is a sufficient, but not a necessary condition for the convexity of the range of an n ‐ dimensional vector measure. In this paper algebraic and topological convexity conditions generalizing Lyapunov's Theorem are developed which are sufficient and necessary as well. From these results the converse of Lyapunov's Theorem is derived in the form of a nonconvexity statement which gives insight into the geometric structure of the ranges of vector measures with atoms. Further, a characterization of the one‐dimensional faces of a zonoid Zμ, is given with respect to the generating spherical Borel measure μ. As an application, it is shown that the absence of μ ‐ atoms is a necessary and sufficient convexity condition for the range of the indefinite integral ∫ x dμ where x denotes the identical function on Sn‐1.
Fréchet Spaces of Holomorphic Functions without Copies of l1
Authors: Valdivia Manuel 
Published: July 2010

AbstractLet X be a Banach space. Let Hw*(X*) the Fréchet space whose elements are the holomorphic functions defined on X* whose restrictions to each multiple mB(X*), m = 1,2, …, of the closed unit ball B(X*) of X* are continuous for the weak‐star topology. A fundamental system of norms for this space is the supremum of the absolute value of each element of Hw*(X*) in mB(X*), m = 1,2,…. In this paper we construct the bidual of l1 when this space contains no copy of l1. We also show that if X is an Asplund space, then Hw*(X*) can be represented as the projective limit of a sequence of Banach spaces that are Asplund.
On the Titchmarsh‐Weyl Coefficients for Singular S‐Hermitian Systems II
Authors: Hinton D. B. , Schneider A. 
Published: July 2010

AbstractIn part I of this work we defined a Titchmarsh‐Weyl‐coefficient M(λ) for singular 8 hermitian systems of arbitrary deficiency index. This construction proceeded by the method of von Noumann for selfadjoint extensions of symmetric operators. In this part we show how a Titchmarsh‐Weyl coefficient M(λ) defined by a limit of Titchmarsh‐Weyl coefficients on compact intervals is related to our M(λ). Examples are given in the intermediate deficiency index case which show that put all limits of Titchmarsh ‐ Weyl coefficients on compact intervals give rise to a singular selfadjoint problem.
A Nonlinear Drift ‐ Diffusion System with Electric Convection Arising in Electrophoretic and Semiconductor Modeling
Authors: Jüngel Ansgar 
Published: July 2010

AbstractA multi‐dimensional transient drift‐diffusion model for (at most) three charged particles, consisting of the continuity equations for the concentrations of the species and the Poisson equation for the electric potential, is considered. The diffusion terms depend on the concentrations. Such a system arises in electrophoretic modeling of three species (neutrally, positively and negatively charged) and in semiconductor theory for two species (positively charged holes and negatively charged electrons). Diffusion terms of degenerate type are also possible in semiconductor modeling. For the initial boundary value problem with mixed Dirichlet ‐ Neumann boundary conditions and general reaction rates, a global existence result is proved. Uniqueness of solutions follows in the Dirichlet boundary case if the diffusion terms are uniformly parabolic or if the initial and boundary densities are strictly positive. Finally, we prove that solutions exist which are positive uniformly in time and globally bounded if the reaction rates satisfy appropriate growth conditions.
Recurrence of Ancestral Lines and Offspring Trees in Time Stationary Branching Populations
Authors: Matthes Klaus , Siegmund‐Schultze Rainer , Wakolbinger Anton 
Published: July 2010

AbstractFor time stationary Galton‐ Watson‐branching populations on a general type space, the structure of the “individually positive recurrent part” of the system is described: its building blocks consist of finitely many “clans” with positive recurrent trunks. Conditions are given when this nubsystem is void, and when it equals the full system. In addition, positive recurrence on the clan level is characterized. Whereas individual positive recurrence turns out to be a symmetric concept with respect to forward and backward time direction (i. e., with respect to anceatral lines and offspring trees), with individual null recurrence this symmetry can fail even in the absence of branching, i.e., for independently migrating particle systems (Example 13.1). For discrete type spaces a classification of types as to the various individual recurrence concepts (positive, null, forward and backward in time) is proposed and illustrated by a couple of results and examples. For finite type spaces conditiom on the branching dynamics and its mean matrix for the existence of nontrivial equilibria are given.
Operator‐Valued Fourier Multipliers, Vector ‐ Valued Besov Spaces, and Applications
Authors: Amann Herbert 
Published: July 2010

AbstractIt is shown that translation‐invariant operation, with operator‐valued symbols act continuously on Bcsov spaces of Band‐space‐valued distributions. This result is then used to extend and complement the known theory of vector‐valued Bcsov spaces. In addition, its power is demonstrated by giving applications to a variety of problems from elliptic and parabolic differential and integro‐differential equations.
On Some Convexity Properties of Orlicz Sequence Spaces Equipped with the Luxemburg Norm
Authors: Hudzik Henryk , Pallaschke Diethard 
Published: July 2010

AbstractRotundity of finite ‐dimensional Orlicz spaces lϕn equipped with the Luxemburg norm is considered. It is proved that criteria for rotundity of lϕnfor n ≥ 3 does not depend on n and are the same as the criteria for rotundity of the inhite‐dimensional subspace hϕ of an Orlicz sequence spacelϕ. Criteria for rotundity of lϕ2 are different. Next, criteria for exposed points, (H)‐ points, strongly exposed points and LUR‐ points of the unit sphere of lϕ and of its subspace hϕ are given.
Aberrant striatal plasticity is specifically associated with dyskinesia following levodopa treatment
Authors: Belujon Pauline , Lodge Daniel J. , Grace Anthony A. 
Published: July 2010

AbstractChronic levodopa treatment for Parkinson's disease often results in the development of abnormal involuntary movement, known as L‐dopa‐induced dyskinesia (LIDs). Studies suggest that LIDs may be associated with aberrant corticostriatal plasticity. Using in vivo extracellular recordings from identified Type I and Type II medium spiny striatal neurons, chronic L‐dopa treatment was found to produce abnormal corticostriatal information processing. Specifically, after chronic L‐dopa treatment in dopamine‐depleted rats, there was a transition from a cortically evoked long‐term depression (LTD) to a complementary but opposing form of plasticity, long‐term potentiation, in Type II “indirect” pathway neurons. In contrast, LTD could still be induced in Type I neurons. Interestingly, the one parameter that correlated best with dyskinesias was the inability to de‐depress established LTD in Type I medium spiny striatal neurons. Taken as a whole, we propose that the induction of LIDs is due, at least in part, to an aberrant induction of plasticity within the Type II indirect pathway neurons combined with an inability to de‐depress established plastic responses in Type I neurons. Such information is critical for understanding the cellular mechanisms underlying one of the major caveats to L‐dopa therapy. © 2010 Movement Disorder Society
Challenges assessing clinical endpoints in early Huntington disease
Authors: Paulsen Jane S. , Wang Chiachi , Duff Kevin , Barker Roger , Nance Martha , Beglinger Leigh , Moser David , Williams Janet K. , Simpson Sheila , Langbehn Douglas , van Kammen Daniel P. ,   the PREDICT‐HD Investigators of the Huntington Study Group
Published: July 2010

AbstractThe basic aim of this study was to evaluate the current accepted standard clinical endpoint for the earliest‐studied HD participants likely to be recruited into clinical trials. As the advent of genetic testing for HD, it is possible to identify gene carriers before the diagnosis of disease, which opens up the possibility of clinical trials of disease‐modifying treatments in clinically asymptomatic persons. Current accepted standard clinical endpoints were examined as part of a multinational, 32‐site, longitudinal, observational study of 786 research participants currently in the HD prodrome (gene‐positive but not clinically diagnosed). Clinical signs and symptoms were used to prospectively predict functional loss as assessed by current accepted standard endpoints over 8 years of follow‐up. Functional capacity measures were not sensitive for HD in the prodrome; over 88% scored at ceiling. Prospective evaluation revealed that the first functional loss was in their accustomed work. In a survival analysis, motor, cognitive, and psychiatric measures were all predictors of job change. To our knowledge, this is the first prospective study ever conducted on the emergence of functional loss secondary to brain disease. We conclude that future clinical trials designed for very early disease will require the development of new and more sensitive measures of real‐life function. © 2010 Movement Disorder Society
Zur staphylinidenfauna der Umgebung von Waren/MüRitz (Mecklenburg)
Authors: Uhlig Manfred , Vogel Jürgen 
Published: July 2010

AbstractFrom Waren/Müritz (GDR, Mecklenburg) and surroundings, 556 staphylinid species are recorded. 4 species (Philonthus coprophilus JARR., Heterothops stiglundbergi ISRAELSON, Gyrophaena williamsi STRAND and Aloconota pfefferi (ROUBAL)) are new for the GDR and 72 species new for Mecklenburg. The paper presents data on phenology, occurence in different habitats and distribution in the area investigated. The nature reservations “Ostufer der Müritz” (406 species), “Ostufer des Feisnecksees” (58 species) and “Wienpietschseen” (99 species) have been investigated particularly thoroughly. After a revision of the HAINMÜLLER collection 13 species previously recorded have to be deleted from the species list of Mecklenburg and further 10 species from the species list of Waren.
Die bedeutung hirnmorphologischer Merkmale für die taxonomie der placentalen säucer
Authors: Hackethal Hans 
Published: July 2010

AbstractTraits of the central nervous system have up to now played only a minor role in taxonomic practice. Based on the macromorphology of the brain in several mammalian orders, the present paper gives the methodological assumptions that should be taken in account when characteristics of the brain are used taxonomically. The conclusions that may be drawn from an analysis of such traits for a taxonomic division of certain orders are discussed. The extent to which some clearly anagenetic processes are taxonomically significant in the development of the central nervous system, as well as how the concepts of evolutionary and consequent genealogical systematics have impinged upon the taxonomic utilization of cerebral traits are also analysed.
Stand und Interesse der Erforschung der Collembolenfauna (Insecta, Apterygota) der Mongolischen Volksrepublik
Authors: Dunger Wolfram 
Published: July 2010

Level and Importance of Investigation of the Fauna of Collembola (Insecta, Apterygota) in the Mongolian People's RepublikThe actual knowledge of the springtail fauna (Collembola) of the Mongolian People's Republic is outlined. Ecological adaptions of some species and some zoogeographical aspects are discussed.
Die Libellenfauna der westlichen und nördlichen Mongolei und einige Phänomene ihrer intrakontinentalen Isolation
Authors: Peters Günther 
Published: July 2010

The Dragonfly Fauna of the Western and Northern Parts of Mongolia and Some Phenomena of Their Intracontinental IsolationBased on 2100 specimens, mostly collected during the II. Mongol‐German Biological Expedition of 1964, a brief survey of the dragonfly fauna of Mongolia is given, including special remarks on those species the author met with in the western and northern districts of the country. 12 species are mentioned for the first time as components of the Mongolian fauna. Comparisons of several morphometrical characters (body length, relative length of the abdomen, absolute and relative body weight) between anisopteran species and between the population groups from north, west and south‐west Mongolia as well as from central Europe have led to some remarkable results: (1) According to the proportions of the body and the differences between males and females in relative length of the abdomen the species can be grouped into separate constitutional types (Aeshna type, Libellula type, Sympetrum type and others). These types seem to represent special evolutionary strategies to perfect the dragonfly body as a “flying machine”. (2) In the different parts of western Mongolia (northern mountain steppes and woodlands, western desert plains, Dzungarian deserts), the majority of the species is represented by populations differing from each other in measurements and/or body proportions. These differences may be as large as or even larger than the distinction rate between each of the Mongolian and the Central European populations. (3) The differences in body length and proportions between the population groups are expressions of different genotypes; it seems impossible to interprete them as results of diverse conditions for larval growth. (4) Some species of dragonflies in western Mongolia occur as geographically isolated populations; the Altai and other mountain ridges lying to the north and southwest separate them from populations in eastern Kazakhstan (Lestes macrostigma, Libellula quadrimaculata and, may be, some more).
Über den Erforschungsstand der mongolischen Mallophagenfauna
Authors: Mey Eberhard 
Published: July 2010

On the Status of Investigation of the Mongolian Mallophaga FaunaSome remarks are given on the history of investigation of the Mongolian Mallophaga fauna. An example is added to illustrate how studies of Mallophaga infestation can be documented. 154 forms of Mallophaga (42 Amblycera, 112 Ischnocera) from Mongolia are listed together with their host species in two lists.
Bemerkungen zu Verbreitung und Systematik der aus der Mongolischen Volksrepublik bekannten laparosticten Scarabaeoidea (Coleoptera)
Authors: Grebenščikov Igor 
Published: July 2010

Remarks on Distribution and Systematics of Laparostict Scarabaeoidea (Coleoptera) Known from the Mongolian People's RepublicAbout 70 species are included in the list of laparostict Lamellicornia, with remarks on taxonomy and distribution for the several districts (aimaks) of the Mongolian People's Republic. It also contains the localities of the beetles collected by the “Mongolian‐German Biological Expeditions since 1962” (up to 1982), also for the few — only 12 — pleurostict species.On the basis of the author's materials from 1962, for several localities all the beetles are recorded which had been collected within one hour, thus showing which species exist together in a certain biotope. Among them a good number of dung‐beetles (e.g., nearly 900 individuals of several Aphodius species) from different localities are noted.
Wasserkäfer (Coleoptera: Hydradephaga & Palpicornia) aus der Mongolischen Volksrepublik
Authors: Bellstedt Ronald 
Published: July 2010

Water‐Beetles (Coleoptera: Hydradephaga & Palpicornia) from the Mongolian People's RepublicFaunistic locality data of 263 water‐beetles in 43 species from Mongolia are listed. Four species of them, Potamonectes formaster (ZAITZ.), Limnebius crinifer REY, Sphaeridium lunatum F. and Berosus spinosus (STEV.), are new to the fauna of Mongolia.
Arbeitsschlüssel zur Bestimmung der Polychaeten der Ostsee
Authors: Bick Andreas , Gosselck Fritz 
Published: July 2010

Identification Key for the Polychaetes of the Baltic SeaAn identification key for the polychaetes of the Baltic Sea is presented in this contribution. It comprises all species (a total of 117) that have been mentioned in the available literature as having been found in the region from Kiel Bight to the northern and eastern parts of the Baltic. The most important taxonomical characters of these polychaetes are illustrated (393 figures on 45 plates). An attempt has also been made to take into account the meristic features of the polychaetes occurring under brackish water conditions in the Baltic. A brief diagnosis is given for all Baltic species, together with an outline of their distribution and ecology.
Zum Strongylus tetracanthus‐Problem und zur Systematik der Cyathostominea (Nematoda: Strongyloidea)
Authors: Hartwich Gerhard 
Published: July 2010

On the Strongylus tetracanthus Problem and the Systematics of the Cyathostominea (Nematoda: Strongyloidea)The original specimens of the much debated cyathostomine Strongylus tetracanthus MEHLIS, 1831, the type species of Cyathostomum MOLIN, 1861, have been recovered in the Zoological Museum, Berlin. These specimens, collected from horses in Germany, could be shown to belong to 10 of the actually known cyathostomine species. Because none of the species hitherto proposed to be the ‘true’ S. tetracanthus is present in this material, the former Cyathostomum catinatum LOOSS, 1900 is decided to represent this species and a lectotype is selected for C. tetracanthum (MEHLIS, 1831) sensu novo. – Furthermore, the cephalic structures of all Central European cyathostomines have been studied comparatively. Basing on the results, a revised classification of the tribe Cyathostominea is given in form of an annotated key to the genera. Coronocyclus n. gen. is erected for Cyathostomum coronatum LOOSS, 1900 and for 3 further species formerly included in Cyathostomum MOLIN (in the sense of LICHTENFELS 1975); the latter genus is redefined. Parapoteriostomum n. gen. is erected for Cyathostoma mettami LEIPER, 1913 (= Cylicodoniophorus mettami) and for 2 further species formerly included in Cylicodontophorus IHLE (in the sense of LICHTENFELS 1975). Petrovinema ERSOV, 1943 is considered a valid genus. In addition, the identity of one genus as well as of three species and one variety with other taxa is pointed out.
Die Typen der Arachniden‐Sammlung des Zoologischen Museums Berlin. VII. Araneae: Araneidae und Tetragnathidae
Authors: Moritz Manfred , Fischer Sophie‐Charlotte 
Published: July 2010

The Types of the Arachnida Collection in the Zoological Museum Berlin VII. Araneae: Araneidae and TetragnathidaeThe 7th part of the type‐catalogue of Arachnida includes 164 species of the family Araneidae and 44 species of the family Tetragnathidae (including Metinae) which are represented in the Zoological Museum Berlin by type‐specimens.
Die Bienen der Gattung Andrena Fabricius (Hymenoptera, Apidae) aus Ägypten und den angrenzenden Gebieten
Authors: Moustafa Mohamed A. 
Published: July 2010

The Bees of the Genus Andrena Fabricius (Hymenoptera, Apidae) from Egypt and Adjacent AreasTo provide a basis for further investigations on occurrence, distribution, and biology of wild bees of the genus Andrena FABRICIUS, 1775 in Egypt, nearly 2150 specimens collected by the author or stored in various collections have been examined. Furthermore, all literary statements concerning Andrena species from Egypt, Libya, the Sudan, Palestine, and Saudi Arabia have been analysed critically. In this study, a total of 196 species and subspecies, respectively, could be found out to occur in that area. A list of these taxa is given, including the data known for the individual species (or subspecies) with regard to its general distribution, occurrence in Egypt and in the adjacent regions, ecology, and seasonal activity. Remarks on the taxonomic status of some species are added.
Bestimmungsschlüssel für die Gehäuseschnecken und Muscheln der Ostsee
Authors: Jagnow Bert , Gosselck Fritz 
Published: July 2010

AbstractAn identification key for the valved marine gastropods (Prosobranchia and Euthyneura) and bivalves of the Baltic Sea (Kiel Bight to Gulf of Bothnia) is presented. The principal taxonomic characters of the 89 species involved are shown in 217 figures on 15 plates. The most important meristic features of the species are described in brief diagnoses which draw attention to deviations from the normal type under brackish water condition. Distribution data and important ecological data are also presented.