cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Lembit Põlma välipäevik nr 18
Creators: name: Põlma, Lembit
Publisher: name: Tallinna Tehnikaülikooli Geoloogia Instituut
Year: 1970
Subjects: Ordoviitsium
Eesti
puuraugud
geoloogilised kirjeldused
Ordovician
drill cores
Estonia
geological descriptions

description: Field notebook with descriptions of Ordovician drill cores from Estonia.
Relational Quadrilateralland. I. The Classical Theory
Creators: name: Anderson, Edward
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Relational particle mechanics models bolster the relational side of the absolute versus relational motion debate, and are additionally toy models for the dynamical formulation of General Relativity and its Problem of Time. They cover two aspects that the more commonly studied minisuperspace General Relativity models do not: 1) by having a nontrivial notion of structure and thus of cosmological structure formation and of localized records. 2) They have linear as well as quadratic constraints, which is crucial as regards modelling many Problem of Time facets. I previously solved relational triangleland classically, quantum mechanically and as regards a local resolution of the Problem of Time. This rested on triangleland's shape space being S^2 with isometry group SO(3), allowing for use of widely-known Geometry, Methods and Atomic/Molecular Physics analogies. I now extend this work to the relational quadrilateral, which is far more typical of the general N-a-gon, represents a `diagonal to nondiagonal Bianchi IX minisuperspace' step-up in complexity, and encodes further Problem of Time subtleties. The shape space now being CP^2 with isometry group SU(3)/Z_3, I now need to draw on Geometry, Shape Statistics and Particle Physics to solve this model; this is therefore an interdisciplinary paper. This Paper treats quadrilateralland at the classical level, and then Paper II provides a quantum treatment.
description: 43 pages and 18 figures. Replaced with version Accepted by Int. J. Mod. Phys. D
Spectral gaps for a Metropolis-Hastings algorithm in infinite dimensions
Creators: name: Hairer, Martin
name: Stuart, Andrew M.
name: Vollmer, Sebastian J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Probability (math.PR)
subject: Statistics Theory (math.ST)
subject: FOS: Mathematics

description: We study the problem of sampling high and infinite dimensional target measures arising in applications such as conditioned diffusions and inverse problems. We focus on those that arise from approximating measures on Hilbert spaces defined via a density with respect to a Gaussian reference measure. We consider the Metropolis-Hastings algorithm that adds an accept-reject mechanism to a Markov chain proposal in order to make the chain reversible with respect to the target measure. We focus on cases where the proposal is either a Gaussian random walk (RWM) with covariance equal to that of the reference measure or an Ornstein-Uhlenbeck proposal (pCN) for which the reference measure is invariant. Previous results in terms of scaling and diffusion limits suggested that the pCN has a convergence rate that is independent of the dimension while the RWM method has undesirable dimension-dependent behaviour. We confirm this claim by exhibiting a dimension-independent Wasserstein spectral gap for pCN algorithm for a large class of target measures. In our setting this Wasserstein spectral gap implies an $L^2$-spectral gap. We use both spectral gaps to show that the ergodic average satisfies a strong law of large numbers, the central limit theorem and nonasymptotic bounds on the mean square error, all dimension independent. In contrast we show that the spectral gap of the RWM algorithm applied to the reference measures degenerates as the dimension tends to infinity.
description: Published in at http://dx.doi.org/10.1214/13-AAP982 the Annals of Applied Probability (http://www.imstat.org/aap/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Portfolio choice, behavioral preferences and equity home bias
Creators: name: Magi, Alessandro
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2007
Subjects: SECS-P/01 Economia politica
SECS-S/06 Metodi matematici dell'economia e delle scienze attuariali e finanziarie

description: We provide a plausible explanation of aggregate portfolio behavior, in a framework where economic agents have behavioral (narrow framing) preferences. The representative agent derives utility not only from consumption (standard models) but also from risky financial wealth fluctuations. Moreover, the investor frames the stock market risk narrowly and has loss averse preferences. We numerically solve, for the foreign equity share, a simple model of international portfolio choice, providing a possible explanation for the equity home bias puzzle. Only economic agents able to process correctly information deriving from stock markets exploit the diversification opportunities provided by international financial markets.
Weak Specification Properties and Large Deviations for Non-additive Potentials
Creators: name: Varandas, Paulo
name: Zhao, Yun
Publisher: name: arXiv
Year: 2012
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37A30, 37D35, 37H15, 60F10

description: We obtain large deviation bounds for the measure of deviation sets associated to asymptotically additive and sub-additive potentials under some weak specification properties. In particular a large deviation principle is obtained in the case of uniformly hyperbolic dynamical systems. Some examples in connection with the convergence of Lyapunov exponents are given.
description: 25 pages; accepted by Ergodic Theory and Dynamical Systems
Cluster Structure on Generalized Weyl Algebras
Creators: name: Saleh, Ibrahim
Publisher: name: arXiv
Year: 2011
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 13F60, 17B10

description: We introduce a class of non-commutative algebras that carry a non-commutative (geometric) cluster structure which are generated by identical copies of generalized Weyl algebras. Equivalent conditions for the finiteness of the set of the cluster variables of these cluster structures are provided. Some combinatorial data, called \textit{cluster strands,} arising from the cluster structure are used to construct irreducible representations of generalized Weyl algebras.
description: in Algebras and Representation Theory, Volume 19, No1, Feb. 2016
Efficient Bayesian Multivariate Surface Regression
Creators: name: Li, Feng
name: Villani, Mattias
Publisher: name: arXiv
Year: 2011
Subjects: subject: Computation (stat.CO)
subject: Applications (stat.AP)
subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences

description: Methods for choosing a fixed set of knot locations in additive spline models are fairly well established in the statistical literature. While most of these methods are in principle directly extendable to non-additive surface models, they are less likely to be successful in that setting because of the curse of dimensionality, especially when there are more than a couple of covariates. We propose a regression model for a multivariate Gaussian response that combines both additive splines and interactive splines, and a highly efficient MCMC algorithm that updates all the knot locations jointly. We use shrinkage priors to avoid overfitting with different estimated shrinkage factors for the additive and surface part of the model, and also different shrinkage parameters for the different response variables. This makes it possible for the model to adapt to varying degrees of nonlinearity in different parts of the data in a parsimonious way. Simulated data and an application to firm leverage data show that the approach is computationally efficient, and that allowing for freely estimated knot locations can offer a substantial improvement in out-of-sample predictive performance.
title: Zwei-Freiheitsgrade-Regelung linearer Systeme mit Stellgrößen- und Stellratenbegrenzungen
Creators: name: Kefferpütz, Klaus
name: Ackermann, Carlo
name: Adamy, Jürgen
Publisher: name: De Gruyter
Year: 2021

description: In diesem Artikel wird eine schnelle Führungsregelung für lineare Regelstrecken unter Stellgrößenund Stellratenbeschränkungen vorgestellt. Dazu wird ein auch für nichtlineare Systeme anwendbarer inversionsbasierter Vorsteuerungsentwurf mit einem weich-strukturvariablen Regler kombiniert. Die Formulierung eines konvexen Optimierungsproblems erlaubt den effizienten Reglerentwurf.
Nudged Elastic Band in Topological Data Analysis
Creators: name: Adams, Henry
name: Atanasov, Atanas
name: Carlsson, Gunnar
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Topology (math.GN)
subject: FOS: Mathematics

description: We use the nudged elastic band method from computational chemistry to analyze high-dimensional data. Our approach is inspired by Morse theory, and as output we produce an increasing sequence of small cell complexes modeling the dense regions of the data. We test the method on data sets arising in social networks and in image processing. Furthermore, we apply the method to identify new topological structure in a data set of optical flow patches.
Constraining primordial non-Gaussianity with CMB-21cm cross-correlations?
Creators: name: Tashiro, Hiroyuki
name: Ho, Shirley
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We investigate the effect of primordial non-Gaussianity on the cross-correlation between the CMB anisotropies and the 21 cm fluctuations from the epoch of reionization. We assume an analytic reionization model and an ionization fraction with $f_{\rm NL}$ induced scale dependent bias. We estimate the angular power spectrum of the cross-correlation of the CMB and 21 cm. In order to evaluate the detectability, the signal-to-noise (S/N) ratio for only a single redshift slice is also calculated for current and future observations, such as CMB observations by Planck satellite and 21 cm observations by Omniscope. The existence of the $f_{\rm NL}$ increases the signal of the cross-correlation at large scales and the amplification does not depend on the reionization parameters in our reionization model. However the cosmic variance is significant on such scales and the S/N ratio is suppressed. The obtained S/N ratio is 2.8 (2.4) for $f_{\rm NL}=10$ (100) in our fiducial reionization model. Our work suggests in the absence of significant foregrounds and systematics, the auto-correlations of 21 cm is a better probe of $f_{\rm NL}$ than the cross-correlations (as expected since it depends on $b^2$), while the cross-correlations contain only one factor of $b$. Nevertheless, it is interesting to examine the cross-correlations between 21 cm and CMB, as the signal-to-noise ratio is not negligible and it is more likely we can rid ourselves of systematics and foregrounds that are common to both CMB and 21 cm experiments than completely clean 21 cm of all of the possible foregrounds and systematics in large scales.
description: 9 pages, 5 figures, Accepted for publication in MNRAS
title: Eine L2-optimale Beobachtertechnik zur Vermeidung von Regler-Windup
Creators: name: Ortseifen, Andreas
name: Adamy, Jürgen
Publisher: name: De Gruyter
Year: 2021

description: Dieser Beitrag stellt eine neue Entwurfsmethodik für Hippes Regler-Antiwindup, das auch als Beobachtertechnik bezeichnet wird, vor. Die Beobachtertechnik basiert auf einer geeigneten Zerlegung des Reglers. Um eine akzeptable Regelgüte sicherzustellen, wurden bislang alle zulässigen Zerlegungen mittels Simulationen evaluiert. Die neu eingeführte Methode bestimmt mittels konvexer Optimierung für jede Zerlegung einen Kennwert, der die Abweichung von dem erwünschten linearen Verhalten des Regelkreises im Sinne der L₂-Norm charakterisiert. Anhand der Kennwerte wird dann eine Zerlegung gewählt.
Propagation of chaos in neural fields
Creators: name: Touboul, Jonathan
Publisher: name: arXiv
Year: 2011
Subjects: subject: Probability (math.PR)
subject: Neurons and Cognition (q-bio.NC)
subject: FOS: Mathematics
subject: FOS: Biological sciences

description: We consider the problem of the limit of bio-inspired spatially extended neuronal networks including an infinite number of neuronal types (space locations), with space-dependent propagation delays modeling neural fields. The propagation of chaos property is proved in this setting under mild assumptions on the neuronal dynamics, valid for most models used in neuroscience, in a mesoscopic limit, the neural-field limit, in which we can resolve the quite fine structure of the neuron's activity in space and where averaging effects occur. The mean-field equations obtained are of a new type: they take the form of well-posed infinite-dimensional delayed integro-differential equations with a nonlocal mean-field term and a singular spatio-temporal Brownian motion. We also show how these intricate equations can be used in practice to uncover mathematically the precise mesoscopic dynamics of the neural field in a particular model where the mean-field equations exactly reduce to deterministic nonlinear delayed integro-differential equations. These results have several theoretical implications in neuroscience we review in the discussion.
description: Updated to correct an erroneous suggestion of extension of the results in Appendix B, and to clarify some measurability questions in the proof of Theorem 2
title: Vereinfachte schnelle Regelung von linearen Systemen mit Stellgrößenbeschränkungen
Creators: name: Jasniewicz, Boris
name: Adamy, Jürgen
name: Domont-Yankulova, Dilyana
Publisher: name: De Gruyter
Year: 2021

description: Sättigende, weiche strukturvariable Regelungen mittels impliziter Lyapunov-Funktionen eignen sich zur schnellen Regelung von linearen Systemen mit Stellgrößenbeschränkungen. Der vorliegende Beitrag stellt eine Vereinfachung dieses Regelungstyps bei gleichzeitiger Verbesserung des Regelverhaltens vor. Die Vereinfachung führt auf weniger restriktive Stabilitätsbedingungen. Hierdurch vergrößert sich die Menge regelbarer Strecken, und die Anwendung dieses Regelungstyps auf bestimmte instabile Strecken ist erstmals möglich. Des Weiteren wird ein LMI-basiertes Verfahren zur effizienten Bestimmung von Reglerparametern vorgestellt. Damit werden Entwürfe von schnellen Regelungen für zwei Benchmarkstrecken vorgenommen. Eine Nachoptimierung der Reglerparameter mittels Suchverfahren führt zu fast zeitoptimalem Verhalten.
Lembit Põlma välipäevik nr 19
Creators: name: Põlma, Lembit
Publisher: name: Tallinna Tehnikaülikooli Geoloogia Instituut
Year: 1966
Subjects: Ordoviitsium
Eesti
Läti
venemaa
puuraugud
geoloogilised kirjeldused
Ordovician
drill cores
Estonia
Latvia
Russia
geological descriptions

description: Field notebook with descriptions of Ordovician drill cores from Estonia, Latvia and Russia.
Continuous variable quantum key distribution with two-mode squeezed states
Creators: name: Madsen, Lars S.
name: Usenko, Vladyslav C.
name: Lassen, Mikael
name: Filip, Radim
name: Andersen, Ulrik L.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum key distribution (QKD) enables two remote parties to grow a shared key which they can use for unconditionally secure communication [1]. The applicable distance of a QKD protocol depends on the loss and the excess noise of the connecting quantum channel [2-10]. Several QKD schemes based on coherent states and continuous variable (CV) measurements are resilient to high loss in the channel, but strongly affected by small amounts of channel excess noise [2-6]. Here we propose and experimentally address a CV QKD protocol which uses fragile squeezed states combined with a large coherent modulation to greatly enhance the robustness to channel noise. As a proof of principle we experimentally demonstrate that the resulting QKD protocol can tolerate more noise than the benchmark set by the ideal CV coherent state protocol. Our scheme represents a very promising avenue for extending the distance for which secure communication is possible.
description: 8 pages, 5 figures
Interaction-induced conducting-nonconducting transition of ultra-cold atoms in 1D optical lattices
Creators: name: Chien, Chih-Chun
name: Gruss, Daniel
name: Di Ventra, Massimiliano
name: Zwolak, Michael
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The study of time-dependent, many-body transport phenomena is increasingly within reach of ultra-cold atom experiments. We show that the introduction of spatially inhomogeneous interactions, e.g., generated by optically-controlled collisions, induce negative differential conductance in the transport of atoms in 1D optical lattices. Specifically, we simulate the dynamics of interacting fermionic atoms via a micro-canonical transport formalism within both mean-field and a higher-order approximation, as well as with time-dependent DMRG. For weakly repulsive interactions, a quasi steady-state atomic current develops that is similar to the situation occurring for electronic systems subject to an external voltage bias. At the mean-field level, we find that this atomic current is robust against the details of how the interaction is switched on. Further, a conducting-to-nonconducting transition exists when the interaction imbalance exceeds some threshold from both our approximate and time-dependent DMRG simulations. This transition is preceded by the atomic equivalent of negative differential conductivity observed in transport across solid-state structures.
description: 10 pages, 8 figures
An elementary method of calculating an explicit form of Young measures in some special cases
Creators: name: Puchała, Piotr
Publisher: name: arXiv
Year: 2011
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 46N10 (Primary), 49M30, 74N15(Secondary)

description: We present an elementary method of explicit calculation of Young measures for certain class of functions. This class contains in particular functions of a highly oscillatory nature which appear in optimization problems and homogenization theory. In engineering such situation occurs for instance in nonlinear elasticity (solid-solid phase transition in certain elastic crystals). Young measures associated with oscillating minimizing sequences gather information about their oscillatory nature and therefore about underlying microstructure. The method presented in the paper makes no use of functional analytic tools. There is no need to use generalized version of the Riemann {Lebesgue lemma and to calculate weak* limits of functions. The main tool is the change of variable theorem. The method applies both to sequences of periodic and nonperiodic functions.
description: 11 pages, no figures An article in its new version due to the reviewers' remarks. All the results stated and proved in multidimensional version; corrected innacuracies
The regulation of mitotic spindle orientation by BRCA1 controls the proliferation, polarization and growth arrest of human mammary epithelia
Creators: name: Nemirovsky, Oksana
Publisher: name: University of British Columbia
Year: 2016

description: Carriers of mutations in the Breast Cancer 1 (BRCA1) gene have an increased risk to develop breast cancer, which tend to be early-onset, lack expression of estrogen receptor, progesterone receptor and human epidermal growth factor receptor 2, and resemble basal epithelia by gene expression. The phenotypic resemblance of these tumours to normal stem/progenitor cells suggests that the loss of BRCA1 function may dysregulate stem cell maintenance and differentiation. In model organisms, a mechanism that promotes the generation of daughter cells different from a mother stem cell is the asymmetric segregation of non-genetic factors through mitotic spindle orientation. BRCA1 regulates mitotic spindle assembly through the post-transcriptional degradation of the low-penetrance breast cancer susceptibility gene product RHAMM and the abundance of RHAMM influences mitotic spindle orientation by regulating its movement along the cell cortex. This led to the hypothesis that BRCA1 is necessary for the correct orientation of the mitotic spindle in mammary epithelial cells, which controls their proliferation, polarization and growth arrest. To address this hypothesis, I studied non-malignant human mammary cell-lines and primary human progenitor cell-enriched populations. BRCA1 was silenced by shRNA introduced through lentiviral transduction. Silencing of BRCA1 in cell-lines increased both mitotic and post-mitotic abnormalities, including the loss of spindle orientation with subsequent lagging chromosomes and micronucleus formation in 2D cultures. The consequence of these defects included a significant decrease in colony-forming capacity. I then enquired whether BRCA1 is necessary for MCF10A cells to proliferate, form polarized acini, and growth arrest in 3D cultures. Control cells underwent planar division to form polarized, growth arrested acini, while BRCA1 silenced structures were larger, less polarized and more proliferative. Loss of correct spindle orientation was also observed. These results indicate that BRCA1 plays a role in maintaining the integrity of human mammary cell division. Loss of BRCA1 induces mitotic and post-mitotic consequences that impair cellular proliferative capacity and abolish ability to undergo directional division, polarization and arrest growth. These findings thus raise the possibility that breast cancer treatments aimed at counteracting the BRCA1-mediated loss of polarity may complement drugs that combat the diminished DNA repair characteristic of BRCA1-associated tumours.
Probing the low-redshift star formation rate as a function of metallicity through the local environments of type II supernovae
Creators: name: Stoll, R.
name: Prieto, J. L.
name: Stanek, K. Z.
name: Pogge, R. W.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Type II SNe can trace star formation to probe its global metallicity distribution at low-redshift. We present oxygen and iron abundance distributions of SN II progenitor regions that avoid many previous sources of bias. Because Fe (rather than O) abundance drives the late stage evolution of the massive stars that are the progenitors of CCSNe, and because Fe enrichment lags O enrichment, we find a general conversion from O abundance to Fe abundance. The distributions we present here are the best yet standard of comparison for evaluating how rare classes of SNe depend on progenitor metallicity. We measure the gas-phase O abundance of a representative subsample of the hosts of SNe II from the first-year PTF SN search, using a combination of SDSS spectra near the SN location (9) and new long slit spectroscopy (25). The median metallicity of these 34 hosts is 12+log(O/H) = 8.65, with a median error of 0.09. The median host galaxy stellar mass from fits to SDSS photometry is 10^9.9 solar masses. They do not show a systematic offset in metallicity or mass from a redshift-matched sample of the MPA/JHU value-added catalog. In contrast to previous SN host metallicity studies, this sample is drawn from a single, areal survey. SNe in the lowest-mass galaxies are not systematically excluded. The metallicity distribution we find is statistically indistinguishable from the metallicity distribution of SN II hosts found by targeted surveys and by samples from multiple surveys with different selection functions. Using the relationship between Fe and O abundances found for Milky Way disk, bulge, and halo stars, we translate our O abundance distribution of SN II environments into Fe abundance estimates. We find that though this sample spans only 0.65 dex in O abundance, the gap between the Fe and O abundance is 50% wider at the low-metallicity end of our sample than at the high-metallicity end. (abridged)
description: 22 pages, 14 figures, 7 tables, ApJ accepted
Comparing continuous treatment matching methods in policy evaluation
Creators: name: Adorno, Valentina
name: Bernini, Cristina
name: Pellegrini, Guido
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2007
Subjects: SECS-S/01 Statistica
SECS-S/03 Statistica economica

description: The paper evaluates the statistical properties of two different matching estimators in the case of continuous treatment, using a Montecarlo experiment. The traditional generalized propensity score matching estimator is compared whit a new two steps matching estimator for the continuous treatment case, recently developed (Adorno, Bernini, Pellegrini, 2007). It compares treatment and control units similar in terms of their observable characteristics in both selection processes (the participation decision and the treatment level assignment), where the generalized propensity score matching estimator collapses the two processes into one single step matching. The results show that the two steps estimator has better finite sample properties if some institutional rules define the level of treatment with respect to the characteristics of treated units.
Sharp bounds for the intersection of nodal lines with certain curves
Creators: name: Jung, Junehyuk
Publisher: name: arXiv
Year: 2011
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: Let $Y$ be a hyperbolic surface and let $ϕ$ be a Laplacian eigenfunction having eigenvalue $-1/4-τ^2$ with $τ>0$. Let $N(ϕ)$ be the set of nodal lines of $ϕ$. For a fixed analytic curve $γ$ of finite length, we study the number of intersections between $N(ϕ)$ and $γ$ in terms of $τ$. When $Y$ is compact and $γ$ a geodesic circle, or when $Y$ has finite volume and $γ$ is a closed horocycle, we prove that $γ$ is "good" in the sense of [TZ]. As a result, we obtain that the number of intersections between $N(ϕ)$ and $γ$ is $O(τ)$. This bound is sharp.
description: 19 pages
The isometric deformability question for constant mean curvature surfaces with topology
Creators: name: Smyth, Brian
name: Tinaglia, Giuseppe
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2008
Subjects: MAT/03 Geometria

description: The paper treats the isometric deformability of non-simply-connected constant mean curvature surfaces which are neither assumed embedded nor complete. We prove that if a smooth oriented surface M immersed in R^3 admits a nontrivial isometric deformation with constant mean curvature H then every cycle in M has vanishing ﬂux and, when H is not zero, also vanishing torque. The vanishing of all ﬂuxes implies the existence of such an isometric deformation when H = 0. Our work generalizes to constant mean curvature surfaces a well-known rigidity result for minimal surfaces.
The CMC Dynamics Theorem in homogeneous n-manifolds
Creators: name: Meeks, William H.
name: Tinaglia, Giuseppe
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2008
Subjects: MAT/03 Geometria

description: In this paper we generalize the Dynamics Theorem for nonzero CMC surfaces in R^3 to a new Dynamics Theorem for nonzero CMC hyper-surfaces in a homogeneous manifold. In this case, the role of translations of R^3 is played by a subgroup, G, of the isometry group of N which acts transitively on N.
title: Synchronisierung identischer linearer Systeme - ein Zugang über LMIs
Creators: name: Listmann, Kim Daniel
name: Adamy, Jürgen
name: Scardovi, Luca
Publisher: name: De Gruyter
Year: 2021

description: Dieser Beitrag stellt ein neues Verfahren zur Synchronisierung identischer linearer Systeme vor, die über statische Kommunikationsnetzwerke verbunden sind. Dazu wird das Entwurfsproblem auf ein simultanes Stabilisierungsproblem zurückgeführt. Aus diesem werden dann neue notwendige und hinreichende Bedingungen für den Entwurf abgeleitet. Diese sind konstruktiv, so dass auf Basis linearer Matrixungleichungen, geeignete Rückführungen für Multi-Agenten-Systeme mit stabilisierbarer Dynamik und zusammenhängendem Kommunikationsnetzwerk entworfen werden können. Es wird gezeigt, dass dies sogar dann möglich ist, wenn die Agenten nur einen Teil ihrer Zustandsinformation austauschen dürfen.
Salient win-paired cues mediate decision making on a rodent gambling task
Creators: name: Barrus, Michael Macfarlane
Publisher: name: University of British Columbia
Year: 2014

description: Background: Pathological gambling is a pervasive and destructive behavioral disorder in which individuals lose control over their gambling behavior, leading to severe personal, social and financial consequences. Current animal models of gambling behavior such as the rodent gambling task (rGT) are useful tools with which to evaluate choice behavior. However, they are limited in their insights into gambling behavior in that they mostly model dimensions of economic decision-making, but not the salient cues intrinsic to human gambling paradigms. Here, we developed a task called the cued rGT to examine the potential influence of salient win-associated cues on decision-making. Methods: 16 male Long-Evans rats were tested on either the traditional or a cued version of the rGT. Once trained, they were treated with a number of dopaminergic compounds to delineate the role of this neurotransmitter in guiding choice behavior in both cued and uncued tasks. Results: Animals on the cued task showed a more disadvantageous choice preference at baseline than animals on the uncued task. Amphetamine caused a significant increase of a safe, certain option in both versions of the task, a result that is somewhat consistent with past findings. Quinpirole, a D2-like agonist, increased disadvantageous choice in the cued group but not the uncued group. There were no effects of eticlopride, a D₂-like antagonist, or selective D4 drugs on choice performance. Conclusions: Salient win-associated cues are sufficient to drive a shift towards disadvantageous choice preference. This effect appears to be mediated, at least in part, by D2-like receptors. These finding suggest the cued rGT is a valuable model with which to study how salient cues can invigorate maladaptive decision making, an important and understudied component of pathological gambling and substance use disorders.
title: Anwendung zeitdiskreter rekurrenter Fuzzy-Systeme zur Fehlerdiagnose
Creators: name: Schwung, Andreas
name: Ortseifen, Andreas
name: Adamy, Jürgen
Publisher: name: De Gruyter
Year: 2021

description: Dieser Beitrag beschreibt die Anwendung zeitdiskreter rekurrenter Fuzzy-Systeme (DRFS) zur Fehlerdetektion und Fehlerisolation. Zum einen wird gezeigt, wie auf Basis datengestützt entworfener DRFS geeignete Residuen gebildet werden können. Zum anderen wird ein Ansatz zur Mehrfehlerisolation mit DRFS präsentiert. Dieser Ansatz basiert auf der Erweiterung klassischer statischer Fuzzy-Systeme zu DRFS. Die Anwendungsmöglichkeiten des Ansatzes werden anhand des Dreitank-Benchmarksystems illustriert.
Official Environmental Statistical Information in Italy
Creators: name: Cocchi, Daniela
name: Alfò, Marco
Publisher: name: Dep. of Statistical Sciences "Paolo Fortunati", Università di Bologna
Year: 2013
Subjects: Official environmental statistics; ISTAT environmental statistics; ISPRA environmental statistics; Italian official statistics on soil; Italian official statistics on water

description: In this paper, we provide descriptions of the official statistical information sources regarding the environment with a focus on soil and water. The discussion focuses on two major contributors of official statistical information in the field, ISTAT and ISPRA, describing their internal structures and links to corresponding EU institutions. We further review their latest production of statistical information on soil and water and provide several suggestions for the potential development of the field.
description: Statistica, Vol 73, No 1 (2013)
Identification of the targets of HbEIN3/EILs in genomic wide in Hevea brasiliensis
Creators: name: Wang, Qichao
name: Xu, Gang
name: Zhai, Jinling
name: Yuan, Hongmei
name: Huang, Xi
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biophysics
subject: Biochemistry
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Biotechnology
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Biological Sciences not elsewhere classified
subject: Cancer
subject: Mental Health
subject: Plant Biology
subject: Computational Biology

description: EIN3/EILs are key regulators in ET signaling pathway. In this work, 4 members of EIN3/EILs of Hevea brasiliensis (HbEIN3/EILs) showed interaction with two F box proteins, HbEBF1 and HbEBF2. HbEIN3 located in nucleus and exhibited strong transcriptional activity. HbEIN3 was induced by ET treatment in C-serum, but not in B-serum of latex. HbEIN3/EILs bound to G-box cis-element. To globally search the potential targets of HbEIN3/EILs, genomic sequences of H. brasiliensis was re-annotated and an HCES (Hevea Cis-Elements Scanning) program was developed (www.h-brasiliensis.com). HCES scanning results showed that ET- and JA- responsive cis-elements distribute overlapping in gene promoters. 3146 genes containing G-box in promoters are potential targets of HbEIN3, including 41 genes involved in biosynthesis and drainage of latex, of which 7 rate-limiting genes of latex production were regulated by both ET and JA, suggesting that ET and JA signaling pathways coordinated the latex biosynthesis and drainage in H. brasiliensis. Abbreviations: ABRE: ABA responsive elements; bHLH: basic helix-loop-helix; COG: Orthologous Groups; DRE: dehydration response element; ERE: ethylene responsive element; ET: Ethylene; GO: Gene Ontology; HCES: Hevea Cis-Elements Scanning; JA: jasmonates; JRE: Jasmonate-responsive element; KEGG: Kyoto Encyclopedia of Genes and Genomes; NR: non-redundant database; PLACE: Plant Cis-acting Regulatory DNA Elements; qRT-PCR: quantitative real-time RT-PCR. HCES program (www.h-brasiliensis.com) was released online, which enable to search any cis-elemnet in genomic wide of Hevea brasiliensis.
Spherical Functions Associated With the Three Dimensional Sphere
Creators: name: Pacharoni, Inés
name: Tirao, Juan
name: Zurrián, Ignacio
Publisher: name: arXiv
Year: 2012
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 22E45 (Primary) 33C45 (Secondary) 33C47

description: In this paper, we determine all irreducible spherical functions Φof any K -type associated to the pair (G,K)=(\SO(4),\SO(3)). This is accomplished by associating to Φa vector valued function H=H(u) of a real variable u, which is analytic at u=0 and whose components are solutions of two coupled systems of ordinary differential equations. By an appropriate conjugation involving Hahn polynomials we uncouple one of the systems. Then this is taken to an uncoupled system of hypergeometric equations, leading to a vector valued solution P=P(u) whose entries are Gegenbauer's polynomials. Afterward, we identify those simultaneous solutions and use the representation theory of \SO(4) to characterize all irreducible spherical functions. The functions P=P(u) corresponding to the irreducible spherical functions of a fixed K-type π_\ell are appropriately packaged into a sequence of matrix valued polynomials (P_w)_{w\ge0} of size (\ell+1)\times(\ell+1). Finally we proved that \widetilde P_w={P_0}^{-1}P_w is a sequence of matrix orthogonal polynomials with respect to a weight matrix W. Moreover we showed that W admits a second order symmetric hypergeometric operator \widetilde D and a first order symmetric differential operator \widetilde E.
description: 49 pages, 2 figures
Assessing, valuing and protecting our environment- is there a statistical challenge to be
Creators: name: Scott, E. Marian
name: Gemmell, J. Campbell
Publisher: name: Dep. of Statistical Sciences "Paolo Fortunati", Università di Bologna
Year: 2013

description: This short article describes some of the evolution in environmental regulation, management and monitoring and the information needs, closely aligned to the statistical challenges to deliver the evidence base for change and effect.
description: Statistica, Vol 73, No 1 (2013)
title: Evaluation of different lesion SDNR definitions in case of breast tomosynthesis and 2D digital mammography
Creators: name: Bara, Stavroula
Publisher: name: European Congress of Radiology
Year: 2019
Subjects: subject: Quality assurance
subject: Acceptance testing
subject: Mammography
subject: Radiation physics

description: Aims and objectives Methods and materials Results Conclusion Personal information References
description: Aims and objectives: This study focuses on the investigation of the effect of different Signal-Difference-to-Noise-Ratio (SDNR) definitions, suggested in the literature when analyzing phantom object images simulating breast lesions [1-4]. Specifically, two (2) SDNR...
Spatial Growth Regressions for the convergence analysis of renewable energy consumption in Europe
Creators: name: Fontanella, Lara
name: Ippoliti, Luigi
name: Sarra, Annalina
name: Valentini, Pasquale
Publisher: name: Dep. of Statistical Sciences "Paolo Fortunati", Università di Bologna
Year: 2013
Subjects: renewable energy consumption; convergence analysis; β-convergence model; Spatial Growth Regressions; conditional autoregressive processes

description: In recent years there has been an increasing awareness on problems related to the economic growth and on the conditions under which some socio-economic variables measured on European countries tend to converge over time towards a common level. This paper is concerned with the use of energy from renewable sources and considers the extent to which EU countries meet the binding commitment to reach a fifth of energy consumption from renewable sources by 2020. By discussing empirical results on the economic growth pattern of 28 countries in the period 1995-2010, we make use of several spatial growth regression models. We show that the proposed models are able to capture the complexity of the phenomenon including the possibility of estimating sitespecific convergence parameters and the identification of convergence clubs.
description: Statistica, Vol 73, No 1 (2013)
Chronic hepatitis B virus infection and risk of stroke types: A prospective cohort study of 500 000 Chinese adults.
Creators: name: Hamilton, Elizabeth M
name: Yang, Ling
name: Wright, Neil
name: Turnbull, Iain
name: Mentzer, Alexander J
name: Matthews, Philippa C
name: Chen, Yiping
name: Du, Huaidong
name: Kartsonaki, Christiana
name: Pang, Yuanjie
name: Pei, Pei
name: Tian, Huizi
name: Yang, Xiaoming
name: Avery, Daniel
name: Yu, Canqing
name: Lv, Jun
name: Clarke, Robert
name: Li, Liming
name: Millwood, Iona Y
name: Chen, Zhengming
Publisher: name: The Francis Crick Institute
Year: 2023
Subjects: classificationCode: Infectious Disease
subject: Infectious Disease
classificationCode: Immunology
subject: Immunology
subject: FOS: Clinical medicine
classificationCode: Genetics & Genomics
subject: Genetics & Genomics

description: BACKGROUND: Stroke is a leading cause of mortality and permanent disability in China, with large and unexplained geographic variations in rates of different stroke types. Chronic hepatitis B virus infection is prevalent among Chinese adults and may play a role in stroke cause. METHODS: The prospective China Kadoorie Biobank included >500 000 adults aged 30 to 79 years who were recruited from 10 (5 urban and 5 rural) geographically diverse areas of China from 2004 to 2008, with determination of hepatitis B surface antigen (HBsAg) positivity at baseline. During 11 years of follow-up, a total of 59 117 incident stroke cases occurred, including 11 318 intracerebral hemorrhage (ICH), 49 971 ischemic stroke, 995 subarachnoid hemorrhage, and 3036 other/unspecified stroke. Cox regression models were used to estimate adjusted hazard ratios (HRs) for risk of stroke types associated with HBsAg positivity. In a subset of 17 833 participants, liver enzymes and lipids levels were measured and compared by HBsAg status. RESULTS: Overall, 3.0% of participants were positive for HBsAg. HBsAg positivity was associated with an increased risk of ICH (adjusted HR, 1.29 [95% CI, 1.16-1.44]), similarly for fatal (n=5982; adjusted HR, 1.36 [95% CI, 1.16-1.59]) and nonfatal (n=5336; adjusted HR, 1.23 [95% CI, 1.06-1.44]) ICH. There were no significant associations of HBsAg positivity with risks of ischemic stroke (adjusted HR, 0.97 [95% CI, 0.92-1.03]), subarachnoid hemorrhage (adjusted HR, 0.87 [95% CI, 0.57-1.33]), or other/unspecified stroke (adjusted HR, 1.12 [95% CI, 0.89-1.42]). Compared with HBsAg-negative counterparts, HBsAg-positive individuals had lower lipid and albumin levels and higher liver enzyme levels. After adjustment for liver enzymes and albumin, the association with ICH from HBsAg positivity attenuated to 1.15 (0.90-1.48), suggesting possible mediation by abnormal liver function. CONCLUSIONS: Among Chinese adults, chronic hepatitis B virus infection is associated with an increased risk of ICH but not other stroke types, which may be mediated through liver dysfunction and altered lipid metabolism.
Quantification of annual wildfire risk; A spatio-temporal point process approach.
Creators: name: Pereira, Paula
name: Turkman, Kamil Feridun
name: Amaral Turkman, Maria Antónia
name: Sá, Ana
name: Pereira, José M.C.
Publisher: name: Dep. of Statistical Sciences "Paolo Fortunati", Università di Bologna
Year: 2013

description: Policy responses for local and global firemanagement depend heavily on the proper understanding of the fire extent as well as its spatio-temporal variation across any given study area. Annual fire risk maps are important tools for such policy responses, supporting strategic decisions such as location-allocation of equipment and human resources. Here, we define risk of fire in the narrow sense as the probability of its occurrence without addressing the loss component. In this paper, we study the spatio-temporal point patterns of wildfires and model them by a log Gaussian Cox processes. Themean of predictive distribution of randomintensity function is used in the narrow sense, as the annual fire risk map for next year.
description: Statistica, Vol 73, No 1 (2013)
A proof of Reidemeister-Singer's theorem by Cerf's methods
Creators: name: Laudenbach, Francois
Publisher: name: arXiv
Year: 2012
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: Heegaard splittings and Heegaard diagrams of a closed 3-manifold M are translated into the language of Morse functions with Morse-Smale pseudo-gradients defined on M. We make use in a very simple setting of techniques which Jean Cerf developed for solving a famous pseudo-isotopy problem. In passing, we show how to cancel the supernumerary local extrema in a generic path of functions when dim M>2. The main tool that we introduce is an elementary swallow tail lemma which could be useful elsewhere.
Assessing biodiversity profile through FDA
Creators: name: Di Battista, Tonio
name: Fortuna, Francesca
Publisher: name: Dep. of Statistical Sciences "Paolo Fortunati", Università di Bologna
Year: 2013
Subjects: renewable energy consumption; convergence analysis; beta-convergence model; Spatial Growth Regressions; conditional autoregressive processes

description: The past few years have highlighted the need to protect diversity in its broader concept and, in particular, with reference to the ecological context for environmental protection. In this context, the problem of the definition and the measurement of diversity becomes fundamental. This paper provides a general picture of the main biodiversity indices proposed in literature and shows their limits in favor of diversity profiles. Since the diversity profile is a curve which expresses the diversity as a function of the relative abundance vector, it may be studied through the functional approach. In particular,we point out the advantages of the parametric FDA which, under suitable assumptions, allow us to obtain summary statistics of the same functional form of the observed data. Diversity profiles and parametric FDA approach have been applied to evaluate the diversity of epiphytic lichens in the province of Florence, providing an alternative way of understanding the biological diversity.
description: Statistica, Vol 73, No 1 (2013)
Innovative care in Latin America: definition, justification and ethical principles
Creators: name: Holzer, Felicitas
name: Mastroleo, Ignacio
Publisher: name: Zenodo
Year: 2019

description: The term “innovation” or “innovative care” has recently gained attention in the context of the use of novel and not yet fully validated medical interventions and technologies. Most notably, there have been various incidences of medical activities insufficiently validated for its regular use in healthcare that fall into this category, such as stem cell treatments, genome sequencing for diagnostic purposes, or novel reproductive technologies. Latin American countries are among the places where new and non-validated medical activities take place, notably due to a lack of clear regulations and the poor support of authorities of existent legal and ethical guidelines, which is driven by “hidden battles” on the moral status of certain interventions. The increasing importance of innovative care underlines the importance of developing a general framework for these practices. Therefore, the present chapter scrutinizes this nascent field of inquiry in Latin America and offers a conceptual framework for innovation as well as its ethical justification. As we will argue, an important use of the term “innovation” or “innovative care” is best interpreted as “new non-validated practice” and not a research activity. Then, we will defend that responsible innovation understood as responsible new non-validated practice is ethically permissible and poses an acceptable medical option if done in exceptional circumstances –where no reasonable alternatives can be provided to an individual patient– and following special ethical principles. Finally, we focus on the peculiarities and specific difficulties the concept of new non-validated practice poses to the Latin American context. We will conclude the chapter by some remarks and recommendations we draw from our analysis for individual patients, doctors, and societies in Latin America.
Lembit Põlma välipäevik nr 20
Creators: name: Põlma, Lembit
Publisher: name: Tallinna Tehnikaülikooli Geoloogia Instituut
Year: 1985
Subjects: Ordoviitsium
Eesti
puuraugud
geoloogilised kirjeldused
Ordovician
drill cores
Estonia
geological descriptions

description: Field notebook with descriptions of Ordovician drill cores from Estonia.
title: Ludendorff, Erich
title: Ludendorff, Erich
Creators: name: Chickering, Roger
Publisher: name: BSB - Bavarian State Library
Year: 2017
Subjects: subject: o.P. Ludendorff, Erich
subject: Ludendorff, Erich, 1865-1937

description: Erich Ludendorff was the effective commander of the German armed forces during the war. He also became a quasi-dictatorial figure, the ruthless symbol of the army’s political power. After the war he became the new republican government’s most bitter public antagonist, challenging its moral legitimacy and conspiring with the Nazis and others to overthrow it.
description: 1914-1918-Online International Encyclopedia of the First World War
description: 1914-1918-Online International Encyclopedia of the First World War