cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Decoherence-free linear quantum subsystems
Creators: name: Yamamoto, Naoki
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: This paper provides a general theory for characterizing and constructing a decoherence-free (DF) subsystem for an infinite dimensional linear open quantum system. The main idea is that, based on the Heisenberg picture of the dynamics rather than the commonly-taken Schrodinger picture, the notions of controllability and observability in control theory are employed to characterize a DF subsystem. A particularly useful result is a general if and only if condition for a linear system to have a DF component; this condition is used to demonstrate how to actually construct a DF dynamics in some specific examples. It is also shown that, as in the finite dimensional case, we are able to do coherent manipulation and preservation of a state of a DF subsystem.
description: 12 pages, 3 figures. To appear in IEEE Transactions on Automatic Control
Grohne, Ernst: Alte Kostbarkeiten aus dem bremischen Kulturbereich
Creators: name: Jacob-Friesen, Karl Hermann
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Rezensionen zu: Grohne, Ernst: Alte Kostbarkeiten aus dem bremischen Kulturbereich. Bremen (Carl Schünemann Verlag) 1956. 183 S. mit zahlreichen Tafeln und Textabb. Leinen
description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 26 (1957): Nachrichten aus Niedersachsens Urgeschichte
Computing symmetry groups of polyhedra
Creators: name: Bremner, David
name: Sikiric, Mathieu Dutour
name: Pasechnik, Dmitrii V.
name: Rehn, Thomas
name: Schürmann, Achill
Publisher: name: arXiv
Year: 2012
Subjects: subject: Combinatorics (math.CO)
subject: Group Theory (math.GR)
subject: Metric Geometry (math.MG)
subject: FOS: Mathematics
subject: 52B15, 20B25

description: Knowing the symmetries of a polyhedron can be very useful for the analysis of its structure as well as for practical polyhedral computations. In this note, we study symmetry groups preserving the linear, projective and combinatorial structure of a polyhedron. In each case we give algorithmic methods to compute the corresponding group and discuss some practical experiences. For practical purposes the linear symmetry group is the most important, as its computation can be directly translated into a graph automorphism problem. We indicate how to compute integral subgroups of the linear symmetry group that are used for instance in integer linear programming.
description: 20 pages, 1 figure; containing a corrected and improved revision
Klaus-Dietmar Schmidt, Denkmalschutz und Denkmalpflege in Niedersachsen
Creators: name: Heine, Hans-Wilhelm
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Rezension zu: Klaus-Dietmar Schmidt, Denkmalschutz und Denkmalpflege in Niedersachsen. Darstellung. Praxis der Kommunalverwaltung. Wiesbaden: Kommunal- und Schul-Verlag GmbH & Co, 2000. IV und 108 Seiten. Kartoniert. ISBN 3-8293-0454-4
description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 69 (2000): Nachrichten aus Niedersachsens Urgeschichte
Box-counting fractal strings, zeta functions, and equivalent forms of Minkowski dimension
Creators: name: Lapidus, Michel L.
name: Rock, John A.
name: Žubrinić, Darko
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: Number Theory (math.NT)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: Primary: 11M41, 28A12, 28A75, 28A80. Secondary: 28B15, 37F35, 40A05, 40A10

description: We discuss a number of techniques for determining the Minkowski dimension of bounded subsets of some Euclidean space of any dimension, including: the box-counting dimension and equivalent definitions based on various box-counting functions; the similarity dimension via the Moran equation (at least in the case of self-similar sets); the order of the (box-)counting function; the classic result on compact subsets of the real line due to Besicovitch and Taylor, as adapted to the theory of fractal strings; and the abscissae of convergence of new classes of zeta functions. Specifically, we define box-counting zeta functions of infinite bounded subsets of Euclidean space and discuss results pertaining to distance and tube zeta functions. Appealing to an analysis of these zeta functions allows for the development of theories of complex dimensions for bounded sets in Euclidean space, extending techniques and results regarding (ordinary) fractal strings obtained by the first author and van Frankenhuijsen.
description: 33 pages, 1 figure
Untersuchungen zur Organisation der Archäologischen Denkmalpflege in Niedersachsen nach Inkrafttreten des Niedersächsischen Denkmalschutzgesetzes von 1978
Creators: name: Glitz, Uwe
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 69 (2000): Nachrichten aus Niedersachsens Urgeschichte
Finiteness properties of cubulated groups
Creators: name: Hruska, G. Christopher
name: Wise, Daniel T.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Group Theory (math.GR)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 20F65 (Primary) 20F67 (Secondary)

description: We give a generalized and self-contained account of Haglund-Paulin's wallspaces and Sageev's construction of the CAT(0) cube complex dual to a wallspace. We examine criteria on a wallspace leading to finiteness properties of its dual cube complex. Our discussion is aimed at readers wishing to apply these methods to produce actions of groups on cube complexes and understand their nature. We develop the wallspace ideas in a level of generality that facilitates their application. Our main result describes the structure of dual cube complexes arising from relatively hyperbolic groups. Let H_1,...,H_s be relatively quasiconvex codimension-1 subgroups of a group G that is hyperbolic relative to P_1,...,P_r. We prove that G acts relatively cocompactly on the associated dual CAT(0) cube complex C. This generalizes Sageev's result that C is cocompact when G is hyperbolic. When P_1,...,P_r are abelian, we show that the dual CAT(0) cube complex C has a G-cocompact CAT(0) truncation.
description: 58 pages, 12 figures. Version 3: Revisions and slightly improved results in Sections 7 and 8. Several theorem numbers have changed from the previous version
Variance bounding and geometric ergodicity of Markov chain Monte Carlo kernels for approximate Bayesian computation
Creators: name: Lee, Anthony
name: Latuszynski, Krzysztof
Publisher: name: arXiv
Year: 2012
Subjects: subject: Methodology (stat.ME)
subject: Computation (stat.CO)
subject: FOS: Computer and information sciences

description: Approximate Bayesian computation has emerged as a standard computational tool when dealing with the increasingly common scenario of completely intractable likelihood functions in Bayesian inference. We show that many common Markov chain Monte Carlo kernels used to facilitate inference in this setting can fail to be variance bounding, and hence geometrically ergodic, which can have consequences for the reliability of estimates in practice. This phenomenon is typically independent of the choice of tolerance in the approximation. We then prove that a recently introduced Markov kernel in this setting can inherit variance bounding and geometric ergodicity from its intractable Metropolis--Hastings counterpart, under reasonably weak and manageable conditions. We show that the computational cost of this alternative kernel is bounded whenever the prior is proper, and present indicative results on an example where spectral gaps and asymptotic variances can be computed, as well as an example involving inference for a partially and discretely observed, time-homogeneous, pure jump Markov process. We also supply two general theorems, one of which provides a simple sufficient condition for lack of variance bounding for reversible kernels and the other provides a positive result concerning inheritance of variance bounding and geometric ergodicity for mixtures of reversible kernels.
description: 26 pages, 10 figures
Modules that detect finite homological dimensions
Creators: name: Celikbas, Olgur
name: Dao, Hailong
name: Takahashi, Ryo
Publisher: name: arXiv
Year: 2012
Subjects: subject: Commutative Algebra (math.AC)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: We study homological properties of test modules that are, in principle, modules that detect finite homological dimensions. The main outcome of our results is a generalization of a classical theorem of Auslander and Bridger: we prove that, if a commutative Noetherian complete local ring R admits a test module of finite Gorenstein dimension, then R is Gorenstein.
description: to appear in Kyoto Journal of Mathematics
Non-stationary patterns of isolation-by-distance: inferring measures of local genetic differentiation with Bayesian kriging
Creators: name: Duforet-Frebourg, Nicolas
name: Blum, Michael G. B.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Applications (stat.AP)
subject: FOS: Biological sciences
subject: FOS: Computer and information sciences
subject: 62P10

description: Patterns of isolation-by-distance arise when population differentiation increases with increasing geographic distances. Patterns of isolation-by-distance are usually caused by local spatial dispersal, which explains why differences of allele frequencies between populations accumulate with distance. However, spatial variations of demographic parameters such as migration rate or population density can generate non-stationary patterns of isolation-by-distance where the rate at which genetic differentiation accumulates varies across space. To characterize non-stationary patterns of isolation-by-distance, we infer local genetic differentiation based on Bayesian kriging. Local genetic differentiation for a sampled population is defined as the average genetic differentiation between the sampled population and fictive neighboring populations. To avoid defining populations in advance, the method can also be applied at the scale of individuals making it relevant for landscape genetics. Inference of local genetic differentiation relies on a matrix of pairwise similarity or dissimilarity between populations or individuals such as matrices of FST between pairs of populations. Simulation studies show that maps of local genetic differentiation can reveal barriers to gene flow but also other patterns such as continuous variations of gene flow across habitat. The potential of the method is illustrated with 2 data sets: genome-wide SNP data for human Swedish populations and AFLP markers for alpine plant species. The software LocalDiff implementing the method is available at http://membres-timc.imag.fr/Michael.Blum/LocalDiff.html
description: In press, Evolution 2014
Die mittelalterliche Keramik der Posteburg bei Schmarrie, Ldkr. Schaumburg
Creators: name: König, Sonja M. A.
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 71 (2002): Nachrichten aus Niedersachsens Urgeschichte
Dieter Buck, Burgen und Ruinen im nördlichen Schwarzwald
Creators: name: Heine, Hans-Wilhelm
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Rezension zu: Dieter Buck, Burgen und Ruinen im nördlichen Schwarzwald. 33 Ausflüge auf den Spuren der Ritter. Stuttgart: Konrad Theiss Verlag GmbH 2002. 144 Seiten mit 43 Farbfotos und 34 Karten. Kartoniert. 1SBN 3-8062-1601-0
description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 71 (2002): Nachrichten aus Niedersachsens Urgeschichte
Finite Morphisms between Projective Varieties and Skeleta
Creators: name: Welliaveetil, John
Publisher: name: arXiv
Year: 2012
Subjects: subject: Algebraic Geometry (math.AG)
subject: Logic (math.LO)
subject: FOS: Mathematics
subject: 03C98, 14G22 (Primary), 14T05 (Secondary)

description: In this paper we study finite morphisms between irreducible projective varieties in terms of the morphisms they induce between the respective analytifications. The background for the principal result is as follows. Let $V'$ and $V$ be irreducible, projective varieties over an algebraically closed, non- archimedean valued field $k$ and $ϕ$ be a finite morphism $ϕ: V' \to V$. Let $x \in V^{an}(L)$, where $L/k$ is an algebraically closed complete non-archimedean valued field extension. We associate canonically to $x$ an $L$-point of the space $(V \times_k L)^{an}$ which lies on the fiber over $x$ and denote this point $x_L$. The embedding of $V$ into some $n$-dimensional projective space defines in a natural way a family of open neighbourhoods $\mathcal{O}_{x_L}$ in $(V \times_k L)^{an}$ of $x_L$. Each element of this family is parametrized by an $(n + 1)^2$-tuple which quantifies its size. Of particular interest to us will be those elements $O$ of the set $\mathcal{O}_{x_L}$ whose preimage for the morphism $(ϕ\times id_L)^{an}$ decomposes into the disjoint union of homeomorphic copies of $O$ via $(ϕ\times id_L)^{an}$. Let $\mathcal{G}_{x_L} \subset \mathcal{O}_{x_L}$ denote the sub collection of elements of this form. Theorem 1.3 shows that there exists a deformation retraction of the space $V$ onto a finite simplicial complex such that along the fibers of the retraction the size of the largest element belonging to $\mathcal{G}_{x_L}$ is constant.
Private Higgs at the LHC
Creators: name: BenTov, Yoni
name: Zee, A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the LHC phenomenology of a general class of "Private Higgs" (PH) models, in which fermions obtain their masses from their own Higgs doublets with $\op(1)$ Yukawa couplings, and the mass hierarchy is translated into a dynamical chain of vacuum expectation values. This is accomplished by introducing a number of light gauge-singlet scalars, the "darkons," some of which could play the role of dark matter. These models allow for substantial modifications to the decays of the lightest Higgs boson, for instance through mixing with TeV-scale PH fields and light darkons: the simplest version of the model predicts the ratios of partial widths to satisfy $\G(h \to VV^*)_{\text{PH}}/\G(h \to VV^*)_{\text{SM}} \approx \G(h \to \g\g)_{\text{PH}}/\G(h \to \g\g)_{\text{SM}} \leq 1$ and $\G(h \to b\bar b)_{\text{PH}}/\G(h \to b\bar b)_{\text{SM}} \sim \op(1)$, where the inequalities are saturated only in the absence of Higgs mixing with light darkons. An extension of the model proposed previously for generating nonzero neutrino masses can also contribute substantially to $h \to \g\g$ without violating electroweak precision constraints. If the Higgs coupling to fermions is found to deviate from the Standard Model (SM) expectation, then the PH model may be a viable candidate for extending the SM.
description: 19 pages; added discussion of h->2photons
Einblicke in eine neolithische - vorwiegend bandkeramische - Siedlung bei Dassensen, Stadt Einbeck, Ldkr. Northeim.
Creators: name: Werben, Ursula
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 73 (2004): Nachrichten aus Niedersachsens Urgeschichte
Similarity and bisimilarity notions appropriate for characterizing indistinguishability in fragments of the calculus of relations
Creators: name: Fletcher, George H. L.
name: Gyssens, Marc
name: Leinders, Dirk
name: Bussche, Jan Van den
name: Van Gucht, Dirk
name: Vansummeren, Stijn
Publisher: name: arXiv
Year: 2012
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Databases (cs.DB)
subject: FOS: Computer and information sciences

description: Motivated by applications in databases, this paper considers various fragments of the calculus of binary relations. The fragments are obtained by leaving out, or keeping in, some of the standard operators, along with some derived operators such as set difference, projection, coprojection, and residuation. For each considered fragment, a characterization is obtained for when two given binary relational structures are indistinguishable by expressions in that fragment. The characterizations are based on appropriately adapted notions of simulation and bisimulation.
description: 36 pages, Journal of Logic and Computation 2014
Neolithische Besiedlung der Gebirgslandschaften: Fallstudie Harz
Creators: name: Valde-Nowak, Pawel
name: Klappauf, Lothar
name: Linke, Friedrich-Albert
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 73 (2004): Nachrichten aus Niedersachsens Urgeschichte
Towards a realistic transport modeling in a superconducting nanowire with Majorana fermions
Creators: name: Rainis, Diego
name: Trifunovic, Luka
name: Klinovaja, Jelena
name: Loss, Daniel
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Motivated by recent experiments searching for Majorana fermions (MFs) in hybrid semiconducting-superconducting nanostructures, we consider a realistic tight-binding model and analyze its transport behavior numerically. In particular, we take into account the presence of a superconducting contact, used in real experiments to extract the current, which is usually not included in theoretical calculations. We show that important features emerge that are absent in simpler models, such as the shift in energy of the proximity gap signal, and the enhanced visibility of the topological gap for increased spin-orbit interaction. We find oscillations of the zero bias peak as a function of the magnetic field and study them analytically. We argue that many of the experimentally observed features hint at an actual spin-orbit interaction larger than the one typically assumed. However, even taking into account all the known ingredients of the experiments and exploring many parameter regimes for MFs, we are not able to reach full agreement with the reported data. Thus, a different physical origin for the observed zero-bias peak cannot be excluded.
description: 7 pages, 7 figures; Published version
A New Continuous-Time Equality-Constrained Optimization Method to Avoid Singularity
Creators: name: Quan, Quan
name: Cai, Kai-Yuan
Publisher: name: arXiv
Year: 2012
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences

description: In equality-constrained optimization, a standard regularity assumption is often associated with feasible point methods, namely the gradients of constraints are linearly independent. In practice, the regularity assumption may be violated. To avoid such a singularity, we propose a new projection matrix, based on which a feasible point method for the continuous-time, equality-constrained optimization problem is developed. First, the equality constraint is transformed into a continuous-time dynamical system with solutions that always satisfy the equality constraint. Then, the singularity is explained in detail and a new projection matrix is proposed to avoid singularity. An update (or say a controller) is subsequently designed to decrease the objective function along the solutions of the transformed system. The invariance principle is applied to analyze the behavior of the solution. We also propose a modified approach for addressing cases in which solutions do not satisfy the equality constraint. Finally, the proposed optimization approaches are applied to two examples to demonstrate its effectiveness.
description: 23 pages. Optimization; equality constraints; control theoretic approaches; continuous-time dynamical systems
Pilot Quantum Error Correction for Global-Scale Quantum Communications
Creators: name: Gyongyosi, Laszlo
name: Imre, Sandor
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: Information Theory (cs.IT)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Real global-scale quantum communications and quantum key distribution systems cannot be implemented by the current fiber and free-space links. These links have high attenuation, low polarization-preserving capability or extreme sensitivity to the environment. A potential solution to the problem is the space-earth quantum channels. These channels have no absorption since the signal states are propagated in empty space, however a small fraction of these channels is in the atmosphere, which causes slight depolarizing effect. Furthermore, the relative motion of the ground station and the satellite causes a rotation in the polarization of the quantum states. In the current approaches to compensate for these types of polarization errors, high computational costs and extra physical apparatuses are required. Here we introduce a novel approach which breaks with the traditional views of currently developed quantum-error correction schemes. The proposed quantum error-correction technique can be applied to fix the polarization errors which are critical in space-earth quantum communication systems. Moreover, the channel coding scheme provides capacity-achieving communication over slightly depolarizing space-earth channels.
description: 50 pages, 2 tables, 17 figures, minor improvements. Journal-ref: IEEE Symposium on Quantum Computing and Computational Intelligence 2013 (IEEE QCCI 2013)
Noise-enhanced quantum transport on a closed loop using quantum walks
Creators: name: Chandrashekar, C. M.
name: Busch, Th.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the effect of noise on the transport of a quantum state from a closed loop of $n-$sites with one of the sites as a sink. Using a discrete-time quantum walk dynamics, we demonstrate that the transport efficiency can be enhanced with noise when the number of sites in the loop is small and reduced when the number of sites in the loop grows. By using the concept of measurement induced disturbance we identify the regimes in which genuine quantum effects are responsible for the enhanced transport.
description: 13 pages, 13 figures. To appear in Quantum Information Processing (2014)
Binary Darboux Transformations in Bidifferential Calculus and Integrable Reductions of Vacuum Einstein Equations
Creators: name: Dimakis, Aristophanes
name: Müller-Hoissen, Folkert
Publisher: name: arXiv
Year: 2012
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 37K10, 70H06

description: We present a general solution-generating result within the bidifferential calculus approach to integrable partial differential and difference equations, based on a binary Darboux-type transformation. This is then applied to the non-autonomous chiral model, a certain reduction of which is known to appear in the case of the D-dimensional vacuum Einstein equations with D-2 commuting Killing vector fields. A large class of exact solutions is obtained, and the aforementioned reduction is implemented. This results in an alternative to the well-known Belinski-Zakharov formalism. We recover relevant examples of space-times in dimensions four (Kerr-NUT, Tomimatsu-Sato) and five (single and double Myers-Perry black holes, black saturn, bicycling black rings).
Plateau angle conditions for the vector-valued Allen-Cahn equation
Creators: name: Alikakos, Nicholas D.
name: Antonopoulos, Panagiotis
name: Damialis, Apostolos
Publisher: name: arXiv
Year: 2012
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35J47, 35J50, 53A10

description: Under proper hypotheses, we rigorously derive the Plateau angle conditions at triple junctions of diffused interfaces in three dimensions, starting from the vector-valued Allen-Cahn equation with a triple-well potential. Our derivation is based on an application of the divergence theorem using the divergence-free form of the equation via an associated stress tensor.
description: 15 pages, 1 figure; minor revision, added proofs
B_c meson enhancement and the momentum dependence in Pb+Pb collisions at LHC energy
Creators: name: Liu, Yunpeng
name: Greiner, Carsten
name: Kostyuk, Andriy
Publisher: name: arXiv
Year: 2012
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: B_c meson production in Pb+Pb collisions at sqrt{s}=2.76 A TeV is surveyed in both a statistical coalescence model and a transport model. The nuclear modification factor R_{AA} is predicted to be between 2 and 18 in the most central collisions, which can help to confirm the regeneration mechanism. In addition, the momentum dependence is also investigated as given by the transport model. A strong suppression of the transverse momentum is found in central collisions accompanying the enhancement in yield. The spectrum and elliptic flow of B_c are also discussed.
description: 17 pages, 7 figures, 1 table
Estimating the historical and future probabilities of large terrorist events
Creators: name: Clauset, Aaron
name: Woodard, Ryan
Publisher: name: arXiv
Year: 2012
Subjects: subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Machine Learning (cs.LG)
subject: Physics and Society (physics.soc-ph)
subject: Applications (stat.AP)
subject: Methodology (stat.ME)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Quantities with right-skewed distributions are ubiquitous in complex social systems, including political conflict, economics and social networks, and these systems sometimes produce extremely large events. For instance, the 9/11 terrorist events produced nearly 3000 fatalities, nearly six times more than the next largest event. But, was this enormous loss of life statistically unlikely given modern terrorism's historical record? Accurately estimating the probability of such an event is complicated by the large fluctuations in the empirical distribution's upper tail. We present a generic statistical algorithm for making such estimates, which combines semi-parametric models of tail behavior and a nonparametric bootstrap. Applied to a global database of terrorist events, we estimate the worldwide historical probability of observing at least one 9/11-sized or larger event since 1968 to be 11-35%. These results are robust to conditioning on global variations in economic development, domestic versus international events, the type of weapon used and a truncated history that stops at 1998. We then use this procedure to make a data-driven statistical forecast of at least one similar event over the next decade.
description: Published in at http://dx.doi.org/10.1214/12-AOAS614 the Annals of Applied Statistics (http://www.imstat.org/aoas/) by the Institute of Mathematical Statistics (http://www.imstat.org)
The field of definition of affine invariant submanifolds of the moduli space of abelian differentials
Creators: name: Wright, Alex
Publisher: name: arXiv
Year: 2012
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: The field of definition of an affine invariant submanifold M is the smallest subfield of the reals such that M can be defined in local period coordinates by linear equations with coefficients in this field. We show that the field of definition is equal to the intersection of the holonomy fields of translation surfaces in M, and is a real number field of degree at most the genus. We show that the projection of the tangent bundle of M to absolute cohomology H^1 is simple, and give a direct sum decomposition of H^1. Applications include explicit full measure sets of translation surfaces whose orbit closures are as large as possible, and evidence for finiteness of algebraically primitive Teichmüller curves. The proofs use recent results of Artur Avila, Alex Eskin, Maryam Mirzakhani, Amir Mohammadi, and Martin Möller.
description: minor revision; 19 pages
An Algorithm to Solve Polyhedral Convex Set Optimization Problems
Creators: name: Löhne, Andreas
name: Schrage, Carola
Publisher: name: arXiv
Year: 2012
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 65K05, 90C99

description: An algorithm which computes a solution of a set optimization problem is provided. The graph of the objective map is assumed to be given by finitely many linear inequalities. A solution is understood to be a set of points in the domain satisfying two conditions: the attainment of the infimum and minimality with respect to a set relation. In the first phase of the algorithm, a linear vector optimization problem, called the vectorial relaxation, is solved. The resulting pre-solution yields the attainment of the infimum but, in general, not minimality. In the second phase of the algorithm, minimality is established by solving certain linear programs in combination with vertex enumeration of some values of the objective map.
description: Changes in comparison to the original version: Deleted: "Of course, every solution is also a pre-solution." first sentence after Definition 3.1 (is not true) Added: Example 3.3, Proposition 3.4, Proposition 4.6
A higher quantum bound for the Vértesi-Bene-Bell-inequality and the role of POVMs regarding its threshold detection efficiency
Creators: name: Barra, J. F.
name: Gómez, E. S.
name: Cañas, G.
name: Nogueira, W. A. T.
name: Neves, L.
name: Lima, G.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Recently, Vértesi and Bene [Phys. Rev. A. {\bf 82}, 062115 (2010)] derived a two-qubit Bell inequality, $I_{CH3}$, which they show to be maximally violated only when more general positive operator valued measures (POVMs) are used instead of the usual von Neumann measurements. Here we consider a general parametrization for the three-element-POVM involved in the Bell test and obtain a higher quantum bound for the $I_{CH3}$-inequality. With a higher quantum bound for $I_{CH3}$, we investigate if there is an experimental setup that can be used for observing that POVMs give higher violations in Bell tests based on this inequality. We analyze the maximum errors supported by the inequality to identify a source of entangled photons that can be used for the test. Then, we study if POVMs are also relevant in the more realistic case that partially entangled states are used in the experiment. Finally, we investigate which are the required efficiencies of the $I_{CH3}$-inequality, and the type of measurements involved, for closing the detection loophole. We obtain that POVMs allow for the lowest threshold detection efficiency, and that it is comparable to the minimal (in the case of two-qubits) required detection efficiency of the Clauser-Horne-Bell-inequality.
description: 11 Pages, 16 Figures
Two Extensions of Topological Feedback Entropy
Creators: name: Hagihara, Rika
name: Nair, Girish N.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: Topological feedback entropy (TFE) was introduced in 2004 to measure the intrinsic rate at which a continuous, fully observed, deterministic control system generates information for controlled set-invariance. In this paper, we generalise this notion in two directions, first to continuous, partially observed systems and then to discontinuous, fully observed systems. In each case, we show that the corresponding generalised TFE coincides with the the smallest feedback bit rate that allows a form of controlled invariance to be achieved.
description: The final publication is available at link.springer.com
Hermann Haiduck, Die Mauritiuskirche von Reepsholt
Creators: name: Bärenfänger, Rolf
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Rezension zu: Hermann Haiduck, Die Mauritiuskirche von Reepsholt. Bau, Geschichte und Umfeld eines bedeutenden mittelalterlichen Sakralbaues in Ostfriesland. Archäologische Mitteilungen aus Nordwestdeutschland, Beiheft 23. Oldenburg: Verlag Isensee 1998. 146 Seiten mit 112 Abbildungen. Broschiert. ISBN 3-89598-577-5
description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 69 (2000): Nachrichten aus Niedersachsens Urgeschichte
Simple, Fast and Deterministic Gossip and Rumor Spreading
Creators: name: Haeupler, Bernhard
Publisher: name: arXiv
Year: 2012
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Combinatorics (math.CO)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: We study gossip algorithms for the rumor spreading problem which asks each node to deliver a rumor to all nodes in an unknown network. Gossip algorithms allow nodes only to call one neighbor per round and have recently attracted attention as message efficient, simple and robust solutions to the rumor spreading problem. Recently, non-uniform random gossip schemes were devised to allow efficient rumor spreading in networks with bottlenecks. In particular, [Censor-Hillel et al., STOC'12] gave an O(log^3 n) algorithm to solve the 1-local broadcast problem in which each node wants to exchange rumors locally with its 1-neighborhood. By repeatedly applying this protocol one can solve the global rumor spreading quickly for all networks with small diameter, independently of the conductance. This and all prior gossip algorithms for the rumor spreading problem have been inherently randomized in their design and analysis. This resulted in a parallel research direction trying to reduce and determine the amount of randomness needed for efficient rumor spreading. This has been done via lower bounds for restricted models and by designing gossip algorithms with a reduced need for randomness. The general intuition and consensus of these results has been that randomization plays a important role in effectively spreading rumors. In this paper we improves over this state of the art in several ways by presenting a deterministic gossip algorithm that solves the the k-local broadcast problem in 2(k+log n)log n rounds. Besides being the first efficient deterministic solution to the rumor spreading problem this algorithm is interesting in many aspects: It is simpler, more natural, more robust and faster than its randomized pendant and guarantees success with certainty instead of with high probability. Its analysis is furthermore simple, self-contained and fundamentally different from prior works.
title: An approach to re-designing leaving care interactions
Creators: name: Rice, Gayle
Publisher: name: Strathprints - University of Strathclyde
Year: 2016

description: Due to the high instances of young people in care becoming homeless after leaving care, the study I undertook for my PhD in design research explored how an intervention could be co-designed to support young people and leaving care workers (LCWs) to share and elicit views about where a young person could live when they leave care. This article describes the methodology I worked through to re-design this interaction and why I think this approach resulted in positive outcomes for the people who tested the new interaction.
Stefan Thörle, Gleicharmige Bügelfibeln des frühen Mittelalters
Creators: name: Blaich, Markus C.
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Rezension zu: Stefan Thörle, Gleicharmige Bügelfibeln des frühen Mittelalters. Universitätsforschungen zur prähistorischen Archäologie 81. Bonn: Habelt 2001.394 Seiten mit zahlreichen Textabbildungen, 61 Tafeln und 38 Karten. Kartoniert. ISBN 3-7749-3085-6
description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 72 (2003): Nachrichten aus Niedersachsens Urgeschichte
Classification Study of WISE Infrared Sources: Identification of Candidate Asymptotic Giant Branch Stars
Creators: name: Tu, Xun
name: Wang, Zhongxiang
Publisher: name: arXiv
Year: 2012
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: In the WISE all-sky source catalogue there are 76 million mid-infrared (MIR) point sources that were detected at the first three WISE bands and have association with only one 2MASS near-IR source within 3 arcsec. We search for their identifications in the SIMBAD database and find 3.2 million identified sources. Based on these known sources, we establish three criteria for selecting candidate AGB stars in the Galaxy, which are three defined occupation zones in a color-color diagram, Galactic latitude |gb|< 20 deg, and "corrected" WISE third-band W3c < 11. Applying these criteria to the WISE+2MASS sources, 1.37 million of them are selected. We analyze the WISE third-band W3 distribution of the selected sources, and further establish that W3 < 8 is required in order to exclude a large fraction of normal stars in them. We therefore find 0.47 million candidate AGB stars in our Galaxy from the WISE source catalogue. Using W3c, we estimate their distances and derive their Galactic distributions. The candidates are generally located around the Galactic center uniformly, with 68% (1-sigma) of them within approximately 8 kpc. We discuss that optical spectroscopy can be used to verify the C-rich AGB stars in our candidates, and they will be good targets for the LAMOST survey that is planned to start from fall of 2012.
description: 11 pages, 6 figures, accepted for publication in Research in Astron. and Astrophys
Control of the magnetism and magnetic anisotropy of a single-molecule magnet with an electric field
Creators: name: Hu, Jun
name: Wu, Ruqian
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Through systematics density functional calculations, the mechanism of the substrate induced spin reorientation transition in FePc/O-Cu(110) was explained in terms of charge transfer and rearrangement of Fe-d orbitals. Moreover, we found giant magnetoelectric effects in this system, manifested by the sensitive dependences of its magnetic moment and magnetic anisotropy energy on external electric field. In particular, the direction of magnetization of FePc/O-Cu(110) is switchable between in-plane and perpendicular axes, simply by applying an external electric field of 0.5 eV/Å along the surface normal.
description: 18 pages, 5 figures
Die Kartierung des Kraftstoffverbrauchs - Zusätzliche Informationsgrundlage für den präzisen Ackerbau
Creators: name: Schutte, Benjamin
name: Herrmann, Ludger
name: Schreiber, Matthias
name: Kutzbach, Heinz Dieter
Publisher: name: LANDTECHNIK
Year: 2004

description: Mapping fuel consumption can be a precision farming method, in order to gather information on soil variability. Without additional sensors, data about real fuel consumption can be collected from the communication system of modern tractors (CAN Bus). In the measurements presented, the mapping was evaluated in terms of the tillage draught force needed and soil type differences. In additional experiments fuel consumption from the CAN bus was compared with the measured data consumption data.
description: LANDTECHNIK, Bd. 59 Nr. 3 (2004)
Yoric Schleef, Natacha Helas (éd.), Cartulaire de l’abbaye de Saint-Pierremont (1095–1297). Édition d’après le manuscrit de la Bibliothèque nationale de France, nouvelles acquisitions latines, 1608, Turnhout (Brepols) 2019
Creators: name: Tock, Benoît-Michel
Publisher: name: Francia-Recensio
Year: 2019

description: Yoric Schleef, Natacha Helas (éd.), Cartulaire de l’abbaye de Saint-Pierremont (1095–1297). Édition d’après le manuscrit de la Bibliothèque nationale de France, nouvelles acquisitions latines, 1608, Turnhout (Brepols) 2019, 375 p., 2 ill. (Atelier de recherche sur les textes médiévaux, 25), ISBN 978-2-503-58084-5, EUR 85,00.
description: Francia-Recensio, 2019/3
Oriented Euler Complexes and Signed Perfect Matchings
Creators: name: Végh, László A.
name: von Stengel, Bernhard
Publisher: name: arXiv
Year: 2012
Subjects: subject: Discrete Mathematics (cs.DM)
subject: Computer Science and Game Theory (cs.GT)
subject: FOS: Computer and information sciences
subject: G.2.2
subject: 90C33

description: This paper presents "oriented pivoting systems" as an abstract framework for complementary pivoting. It gives a unified simple proof that the endpoints of complementary pivoting paths have opposite sign. A special case are the Nash equilibria of a bimatrix game at the ends of Lemke-Howson paths, which have opposite index. For Euler complexes or "oiks", an orientation is defined which extends the known concept of oriented abstract simplicial manifolds. Ordered "room partitions" for a family of oriented oiks come in pairs of opposite sign. For an oriented oik of even dimension, this sign property holds also for unordered room partitions. In the case of a two-dimensional oik, these are perfect matchings of an Euler graph, with the sign as defined for Pfaffian orientations of graphs. A near-linear time algorithm is given for the following problem: given a graph with an Eulerian orientation with a perfect matching, find another perfect matching of opposite sign. In contrast, the complementary pivoting algorithm for this problem may be exponential.
description: 43 pages, journal version for Mathematical Programming Series B plus 2 Appendices
Second-Order Slepian-Wolf Coding Theorems for Non-Mixed and Mixed Sources
Creators: name: Nomura, Ryo
name: Han, Te Sun
Publisher: name: arXiv
Year: 2012
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: The second-order achievable rate region in Slepian-Wolf source coding systems is investigated. The concept of second-order achievable rates, which enables us to make a finer evaluation of achievable rates, has already been introduced and analyzed for general sources in the single-user source coding problem. Analogously, in this paper, we first define the second-order achievable rate region for the Slepian-Wolf coding system to establish the source coding theorem in the second- order sense. The Slepian-Wolf coding problem for correlated sources is one of typical problems in the multi-terminal information theory. In particular, Miyake and Kanaya, and Han have established the first-order source coding theorems for general correlated sources. On the other hand, in general, the second-order achievable rate problem for the Slepian-Wolf coding system with general sources remains still open up to present. In this paper we present the analysis concerning the second- order achievable rates for general sources which are based on the information spectrum methods developed by Han and Verdu. Moreover, we establish the explicit second-order achievable rate region for i.i.d. correlated sources with countably infinite alphabets and mixed correlated sources, respectively, using the relevant asymptotic normality.
description: Title was changed
Carina L. Johnson, David M. Luebke, Marjorie E. Plummer, Jesse Spohnholz (ed.), Archeologies of Confession. Writing the German Reformation, 1517–2017, New York, Oxford (Berghahn) 2017
Creators: name: Chaix, Gérald
Publisher: name: Francia-Recensio
Year: 2019

description: Carina L. Johnson, David M. Luebke, Marjorie E. Plummer, Jesse Spohnholz (ed.), Archeologies of Confession. Writing the German Reformation, 1517–2017, New York, Oxford (Berghahn) 2017, VI–345 p. (Spektrum. Publications of the German Studies Association, 16), ISBN 978-1-78533-540-2, USD 130,00.
description: Francia-Recensio, 2019/3
title: The microeconometrics of household behaviour: building the foundations, 1920-1960
Creators: name: Cheng, Chung-Tang
Publisher: name: London School of Economics and Political Science (LSE)
Year: 2021

description: This thesis explores the early history of microeconometrics of household behaviour from the interwar period to the 1960s. The analytical framework relies on a model of empirical knowledge production that captures the scientific progress in terms of its materialistic supplies and intellectual demands. Under this framework, the thesis traces how microdata at the household level first appeared in the econometrician’s research agenda and how the discipline was consolidated by communities of econometricians. This study contains four substantive chapters. The first three chapters are selective case-studies charting three important approaches in the development of microeconometric practices. The first chapter reviews the interwar literature. Among those decentralised practices, Arthur Bowley’s analysis on family expenditure stands out as one of the earliest exemplars. The second and third chapters explore the formation of two communities in the post-war period: Richard Stone’s Department of Applied Economics (DAE) at Cambridge, and Guy Orcutt’s Social Systems Research Institute (SSRI) at Wisconsin. With the benefit of the new microdata and the introduction of computer-based calculation, Stone and his crew created a cooperative group that produced the first series of microeconometric publications driven by intellectual problems and economic questions. By contrast, Orcutt came to the analysis of microdata driven by his dream of microsimulation, a bottom-up method of microeconometric modelling, more heavily dependent on computing power and designed for revising public policies. After frustration at the SSRI, he finally finished a household simulation model at the Urban Institute. Taking the DAE and SSRI as examples, the fourth chapter assesses both the internal academic relationships of these groups, and the consolidation of both literatures using bibliometric data and network analysis. The results demonstrate the ways in which the DAE was a more interconnected network than the SSRI. The citation analysis offers an alternative way in understanding the formation of econometric knowledge based on community relations rather than the supply of materials or intellectual demands.
Nicolaas Rupke, Gerhard Lauer (ed.), Johann Friedrich Blumenbach. Race and natural history, 1750–1850, London, New York (Routledge) 2018
Creators: name: Schlicht, Laurens
Publisher: name: Francia-Recensio
Year: 2019

description: Nicolaas Rupke, Gerhard Lauer (ed.), Johann Friedrich Blumenbach. Race and natural history, 1750–1850, London, New York (Routledge) 2018, XVI–263 p., 25 fig., 3 tabl. (Routledge Studies in the History of Science, Technology and Medicine, 33), ISBN 978-113-87384-23, GBP 115,00.
description: Francia-Recensio, 2019/3