cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
On the existence of the Brillouin peaks in a simple dilute dissipative gas
Creators: name: Sandoval-Villalbazo, A.
name: Sagaceta-Mejía, A. R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Light scattering due to the interaction of photons and acoustic waves present in a dilute inert gas is analyzed through the use of irreversible thermodynamics. The dispersion relation, which governs the dynamics of the density fluctuation of the gas allows the establishment of a simple criterion for the corresponding Rayleigh-Brillouin spectrum to be observed. The criterion here proposed allows a clear physical interpretation and suggests generalizations for other interesting physical scenarios.
description: 7 pages, 1 figure
Family task sharing: a multivariate analysis
Creators: name: Price, Margaret I.
Publisher: name: University of Calgary
Year: 1985
Subjects: subject: HD 6060.65 C32 A53 1986
subject: Sexual division of labor - Alberta - Calgary
subject: Married people - Alberta - Calgary - Attitudes
subject: Married people - Employment - Alberta - Calgary

description: Bibliography: p. 154-164.
Reservoir origin and controls on hydrocarbon distributions interpreted with a computerized data base, lower cretaceous Mannville group, west-central Saskatchewan
Creators: name: Putnam, Peter E. (Peter Edward)
Publisher: name: University of Calgary
Year: 1985
Subjects: subject: TN 870.5 P86 1986
subject: Petroleum reserves - Data processing
subject: Petroleum - Geology - Saskatchewan
subject: Geology, Stratigraphic - Cretaceous
subject: Mannville Group (Sask.)

description: Bibliography: p. 190-198.
title: Designkonzept und daraus abgeleitete Prototypen für eine resthörerhaltende, minimal-invasive CI Operationsstrategie "RoboJig"
Creators: name: John, Samuel
name: Rau, Thomas
name: Kluge, Marcel
name: Lexow, Jakob
name: Gaa, Johannes
name: Müller, Samuel
name: Kahrs, Lüder
name: Majdani, Omid
name: Ortmaier, Tobias
name: Lenarz, Thomas
Publisher: name: German Medical Science GMS Publishing House
Year: 2016
Subjects: subject: 610 Medical sciences; Medicine

description: Das Cochlea Implantat (CI) ist eine Erfolgsgeschichte in der HNO. Der inzwischen routinemäßig durchgeführte Eingriff ist jedoch, da in der Nähe von kritischen anatomischen Strukturen, mit einem nicht zu unterschätzenden Restrisiko behaftet und erfordert daher größtes[zum vollständigen Text gelangen Sie über die oben angegebene URL]
description: 87. Jahresversammlung der Deutschen Gesellschaft für Hals-Nasen-Ohren-Heilkunde, Kopf- und Hals-Chirurgie
Estimate of the impact of background particles on the X-Ray Microcalorimeter Spectrometer on IXO
Creators: name: Lotti, S.
name: Perinati, E.
name: Natalucci, L.
name: Piro, L.
name: Mineo, T.
name: Colasanti, L.
name: Macculi, C.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We present the results of a study on the impact of particles of galactic (GCR) and solar origin for the X-ray Microcalorimeter Spectrometer (XMS) aboard an astronomical satellite flying in an orbit at the second Lagrangian point (L2). The detailed configuration presented in this paper is the one adopted for the International X-Ray Observatory (IXO) study, however the derived estimates can be considered a conservative limit for ATHENA, that is the IXO redefined mission proposed to ESA. This work is aimed at the estimate of the residual background level expected on the focal plane detector during the mission lifetime, a crucial information in the development of any instrumental configuration that optimizes the XMS scientific performances. We used the Geant4 toolkit, a Monte Carlo based simulator, to investigate the rejection efficiency of the anticoincidence system and assess the residual background on the detector.
description: 18 pages, 9 figures
Brunet-Derrida particle systems, free boundary problems and Wiener-Hopf equations
Creators: name: Durrett, Rick
name: Remenik, Daniel
Publisher: name: arXiv
Year: 2009
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: We consider a branching-selection system in $\mathbb {R}$ with $N$ particles which give birth independently at rate 1 and where after each birth the leftmost particle is erased, keeping the number of particles constant. We show that, as $N\to\infty$, the empirical measure process associated to the system converges in distribution to a deterministic measure-valued process whose densities solve a free boundary integro-differential equation. We also show that this equation has a unique traveling wave solution traveling at speed $c$ or no such solution depending on whether $c\geq a$ or $c
description: A mistake in one of the proofs was pointed out to us, but the gap in the argument has been addressed in a recent paper, see Remarks 1.1 and 2.10
All-optical link for direct comparison of distant optical clocks
Creators: name: Fujieda, Miho
name: Kumagai, Motohiro
name: Nagano, Shigeo
name: Yamaguchi, Atsushi
name: Hachisu, Hidekazu
name: Ido, Tetsuya
Publisher: name: arXiv
Year: 2011
Subjects: subject: Optics (physics.optics)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We developed an all-optical link system for making remote comparisons of two distant ultra-stable optical clocks. An optical carrier transfer system based on a fiber interferometer was employed to compensate the phase noise accumulated during the propagation through a fiber link. Transfer stabilities of $2\times10^{-15}$ at 1 second and $4\times10^{-18}$ at 1000 seconds were achieved in a 90-km link. An active polarization control system was additionally introduced to maintain the transmitted light in an adequate polarization, and consequently, a stable and reliable comparison was accomplished. The instabilities of the all-optical link system, including those of the erbium doped fiber amplifiers (EDFAs) which are free from phase-noise compensation, were below $2\times10^{-15}$ at 1 second and $7\times10^{-17}$ at 1000 seconds. The system was available for the direct comparison of two distant $^{87}$Sr lattice clocks via an urban fiber link of 60 km. This technique will be essential for the measuring the reproducibility of optical frequency standards.
title: Transorale Roboterchirurgie (TORS) mit dem Flex® Robotic System
Creators: name: Mattheis, Stefan
name: Haßkamp, Pia
name: Holtmann, Laura
name: Lang, Stephan
Publisher: name: German Medical Science GMS Publishing House
Year: 2016
Subjects: subject: 610 Medical sciences; Medicine

description: Einleitung: Beim Flex® Robotic System (Medrobotics, Raynham, MA, USA) handelt es sich um ein neues flexibles Endoskopiesystem zur transoralen Biopsie und Resektion von pharyngealen und laryngealen Raumforderungen.    Material und Methoden: Das Flex® System wird transoral mit Hilfe eines Joystick[zum vollständigen Text gelangen Sie über die oben angegebene URL]
description: 87. Jahresversammlung der Deutschen Gesellschaft für Hals-Nasen-Ohren-Heilkunde, Kopf- und Hals-Chirurgie
Art-games, meaning and style: an examination of artistic practice in the light of the later Wittgenstein
Creators: name: Rasmussen, Greig S. (Greig Stephen), 1957-
Publisher: name: University of Calgary
Year: 1984
Subjects: subject: B 3376 W564 R36 1986
subject: Wittgenstein, Ludwig, 1889-1951
subject: Art - Philosophy
subject: Meaning (Philosophy)

description: Bibliography: p. 132-137.
A Closed-Form Solution of the Multi-Period Portfolio Choice Problem for a Quadratic Utility Function
Creators: name: Bodnar, Taras
name: Parolya, Nestor
name: Schmid, Wolfgang
Publisher: name: arXiv
Year: 2012
Subjects: subject: Portfolio Management (q-fin.PM)
subject: Optimization and Control (math.OC)
subject: Probability (math.PR)
subject: FOS: Economics and business
subject: FOS: Mathematics

description: In the present paper, we derive a closed-form solution of the multi-period portfolio choice problem for a quadratic utility function with and without a riskless asset. All results are derived under weak conditions on the asset returns. No assumption on the correlation structure between different time points is needed and no assumption on the distribution is imposed. All expressions are presented in terms of the conditional mean vectors and the conditional covariance matrices. If the multivariate process of the asset returns is independent it is shown that in the case without a riskless asset the solution is presented as a sequence of optimal portfolio weights obtained by solving the single-period Markowitz optimization problem. The process dynamics are included only in the shape parameter of the utility function. If a riskless asset is present then the multi-period optimal portfolio weights are proportional to the single-period solutions multiplied by time-varying constants which are depending on the process dynamics. Remarkably, in the case of a portfolio selection with the tangency portfolio the multi-period solution coincides with the sequence of the simple-period solutions. Finally, we compare the suggested strategies with existing multi-period portfolio allocation methods for real data.
description: 38 pages, 9 figures, 3 tables, changes: VAR(1)-CCC-GARCH(1,1) process dynamics and the analysis of increasing horizon are included in the simulation study, under revision in Annals of Operations Research
The Scale-Invariant Vacuum (SIV) Theory: A Possible Origin of Dark Matter and Dark Energy
Creators: name: Maeder, Andre
name: Gueorguiev, Vesselin G.
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The Scale Invariant Vacuum (SIV) theory rests on the basic hypothesis that the macroscopic empty space is scale invariant. This hypothesis is applied in the context of the Integrable Weyl Geometry, where it leads to considerable simplifications in the scale covariant cosmological equations. After an initial explosion and a phase of braking, the cosmological models show a continuous acceleration of the expansion. Several observational tests of the SIV cosmology are performed: on the relation between $H_0$ and the age of the Universe, on the $m-z$ diagram for SNIa data and its extension to $z=7$ with quasars and GRBs, and on the $H(z)$ vs. $z$ relation. All comparisons show a very good agreement between SIV predictions and observations. Predictions for the future observations of the redshift drifts are also given. In the weak field approximation, the equation of motion contains, in addition to the classical Newtonian term, an acceleration term (usually very small) depending on the velocity. The two-body problem is studied, showing a slow expansion of the classical conics. The new equation has been applied to clusters of galaxies, to rotating galaxies (some proximities with Modifies Newtonian Dynamics, MOND, are noticed), to the velocity dispersion vs. the age of the stars in the Milky Way, and to the growth of the density fluctuations in the Universe. We point out the similarity of the mechanical effects of the SIV hypothesis in cosmology and in the Newtonian approximation. In both cases, it results in an additional acceleration in the direction of motions. In cosmology, these effects are currently interpreted in terms of the dark energy hypothesis, while in the Newtonian approximation they are accounted for in terms of the dark matter (DM) hypothesis. These hypotheses appear no longer necessary in the SIV context.
description: 33 pages, 11 figures, 1 table
Zero Sound Propagation in Femto-Scale Quantum Liquids
Creators: name: Iwata, Yoritaka
Publisher: name: arXiv
Year: 2012
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Charge equilibration has been recognized as a dominant process at the early stage of low-energy heavy-ion reactions. The production of exotic nuclei is suppressed under the appearance of charge equilibration, in which the proton-neutron ratios of the final reaction products are inevitably averaged. Therefore charge equilibration plays one of the most crucial roles in the synthesis of chemical elements. Focusing on how and when the charge equilibration takes place, the zero-sound propagation in femto-scale quantum liquids is explained.
description: Review Article to appear in J. Mod. Phys. (accepted). Some revisions are to be made on the publish version
On the Exact Solution of the Multi-Period Portfolio Choice Problem for an Exponential Utility under Return Predictability
Creators: name: Bodnar, Taras
name: Parolya, Nestor
name: Schmid, Wolfgang
Publisher: name: arXiv
Year: 2012
Subjects: subject: Portfolio Management (q-fin.PM)
subject: Optimization and Control (math.OC)
subject: Probability (math.PR)
subject: FOS: Economics and business
subject: FOS: Mathematics

description: In this paper we derive the exact solution of the multi-period portfolio choice problem for an exponential utility function under return predictability. It is assumed that the asset returns depend on predictable variables and that the joint random process of the asset returns and the predictable variables follow a vector autoregressive process. We prove that the optimal portfolio weights depend on the covariance matrices of the next two periods and the conditional mean vector of the next period. The case without predictable variables and the case of independent asset returns are partial cases of our solution. Furthermore, we provide an empirical study where the cumulative empirical distribution function of the investor's wealth is calculated using the exact solution. It is compared with the investment strategy obtained under the additional assumption that the asset returns are independently distributed.
description: 16 pages, 2 figures
On The Recovery Performance of Single- and Multipath OLSR in Wireless Multi-Hop Networks
Creators: name: Doghri, Inès
name: Reynaud, Laurent
name: Guérin-Lassous, Isabelle
Publisher: name: arXiv
Year: 2012
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: In this paper, we study and improve the recovery properties of single and multipath routing strategies when facing network failure situations. In particular, we focus our study on two MANET routing protocols: OLSR and its multipath extension MP-OLSR. In various wireless multi-hop network environments, especially in multiple chain topologies, we define and seek to evaluate the latency introduced by these protocols to find a new path after a link failure. Theoretical estimations and simulation results show that, under dual chain-topologies, this latency can be too long and incompatible with the needs of loss and delay constrained applications. As the source nodes cannot detect link failures immediately because of the delay incurred by the well-known nature of link state protocols in general, and of OLSR Topology Control (TC) messages in particular, these nodes keep sending packets along broken paths. We thus study the inconsistencies between the actual network topology and the nodes' own representation. After analyzing the consequences of this long latency, we seek to alleviate these problems with the introduction of adapted mechanisms. We propose three new different schemes and accordingly extend the original OLSR and MP-OLSR protocols in order to decrease the expected latency and improve the protocol performance. Simulation results show a steep decrease of the latency when using these new schemes in dual chain-topologies. We also discuss these results in terms of packet loss, end-to-end delay and overhead.
description: Third International ICST Conference on Ad Hoc Networks, ADHOCNETS 2011, Paris : France (2011)
title: Ein an den minimal-invasiven Zugang zum Innenohr angepasstes Insertionstool und zugehörige CI-Elektrode
Creators: name: Rau, Thomas S.
name: Kluge, Marcel
name: Dhanasingh, Anandhan
name: Sieber, Daniel
name: Lenarz, Thomas
name: Majdani, Omid
Publisher: name: German Medical Science GMS Publishing House
Year: 2016
Subjects: subject: 610 Medical sciences; Medicine

description: Einleitung: Beim minimal-invasiven Zugang zum Innenohr wird ein einzelner dünner Bohrkanal angelegt, um die Cochlea zu eröffnen. Für die anschließende Insertion der Elektrode eines Cochlea-Implantats (CI) sind miniaturisierte Instrumente erforderlich, die dafür geeignet sind.[zum vollständigen Text gelangen Sie über die oben angegebene URL]
description: 87. Jahresversammlung der Deutschen Gesellschaft für Hals-Nasen-Ohren-Heilkunde, Kopf- und Hals-Chirurgie
Homology and Bisimulation of Asynchronous Transition Systems and Petri Nets
Creators: name: Husainov, Ahmet A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Algebraic Topology (math.AT)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: 68Q85, 18G35, 18B20, 55U10, 55U15

description: Homology groups of labelled asynchronous transition systems and Petri nets are introduced. Examples of computing the homology groups are given. It is proved that if labelled asynchronous transition systems are bisimulation equivalent, then they have isomorphic homology groups. A method of constructing a Petri net with given homology groups is found.
description: 21 pages
ConstraintMatch for Semi-constrained Clustering
Creators: name: Goschenhofer, Jann
name: Bischl, Bernd
name: Kira, Zsolt
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Constrained clustering allows the training of classification models using pairwise constraints only, which are weak and relatively easy to mine, while still yielding full-supervision-level model performance. While they perform well even in the absence of the true underlying class labels, constrained clustering models still require large amounts of binary constraint annotations for training. In this paper, we propose a semi-supervised context whereby a large amount of \textit{unconstrained} data is available alongside a smaller set of constraints, and propose \textit{ConstraintMatch} to leverage such unconstrained data. While a great deal of progress has been made in semi-supervised learning using full labels, there are a number of challenges that prevent a naive application of the resulting methods in the constraint-based label setting. Therefore, we reason about and analyze these challenges, specifically 1) proposing a \textit{pseudo-constraining} mechanism to overcome the confirmation bias, a major weakness of pseudo-labeling, 2) developing new methods for pseudo-labeling towards the selection of \textit{informative} unconstrained samples, 3) showing that this also allows the use of pairwise loss functions for the initial and auxiliary losses which facilitates semi-constrained model training. In extensive experiments, we demonstrate the effectiveness of ConstraintMatch over relevant baselines in both the regular clustering and overclustering scenarios on five challenging benchmarks and provide analyses of its several components.
On the Constraints of Galaxy Assembly Bias in Velocity Space
Creators: name: McCarthy, Kevin S.
name: Zheng, Zheng
name: Guo, Hong
name: Luo, Wentao
name: Lin, Yen-Ting
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: If the formation of central galaxies in dark matter haloes traces the assembly history of their host haloes, in haloes of fixed mass, central galaxy clustering may show dependence on properties indicating their formation history. Such a galaxy assembly bias effect has been investigated by Lin et al. 2016, with samples of central galaxies constructed in haloes of similar mass and with mean halo mass verified by galaxy lensing measurements, and no significant evidence of assembly bias is found from the analysis of the projected two-point correlation functions of early- and late-forming central galaxies. In this work, we extend the the investigation of assembly bias effect from real space to redshift (velocity) space, with an extended construction of early- and late-forming galaxies. We carry out halo occupation distribution modelling to constrain the galaxy-halo connection to see whether there is any sign of the effect of assembly bias. We find largely consistent host halo mass for early- and late-forming central galaxies, corroborated by lensing measurements. The central velocity bias parameters, which are supposed to characterise the mutual relaxation between central galaxies and their host haloes, are inferred to overlap between early- and late-forming central galaxies. However, we find a large amplitude of velocity bias for early-forming central galaxies (e.g. with central galaxies moving at more than 50% that of dark matter velocity dispersion inside host haloes), which may signal an assembly bias effect. A large sample with two-point correlation functions and other clustering measurements and improved modelling will help reach a conclusive result.
description: 17 pages, 14 figures, 1 table, Published to MNRAS 13 Sept. 2021
The Language of Search
Creators: name: Darwiche, A.
name: Huang, J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: This paper is concerned with a class of algorithms that perform exhaustive search on propositional knowledge bases. We show that each of these algorithms defines and generates a propositional language. Specifically, we show that the trace of a search can be interpreted as a combinational circuit, and a search algorithm then defines a propositional language consisting of circuits that are generated across all possible executions of the algorithm. In particular, we show that several versions of exhaustive DPLL search correspond to such well-known languages as FBDD, OBDD, and a precisely-defined subset of d-DNNF. By thus mapping search algorithms to propositional languages, we provide a uniform and practical framework in which successful search techniques can be harnessed for compilation of knowledge into various languages of interest, and a new methodology whereby the power and limitations of search algorithms can be understood by looking up the tractability and succinctness of the corresponding propositional languages.
Perturbation theory without power series: iterative construction of non-analytic operator spectra
Creators: name: Smerlak, Matteo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: It is well known that quantum-mechanical perturbation theory often give rise to divergent series that require proper resummation. Here I discuss simple ways in which these divergences can be avoided in the first place. Using the elementary technique of relaxed fixed-point iteration, I obtain convergent expressions for various challenging ground states wavefunctions, including quartic, sextic and octic anharmonic oscillators, the hydrogenic Zeeman problem, and the Herbst-Simon Hamiltonian (with finite energy but vanishing Rayleigh-Schrödinger coefficients), all at arbitarily strong coupling. These results challenge the notion that non-analytic functions of coupling constants are intrinsically "non-perturbative". A possible application to exact diagonalization is briefly discussed.
description: 6 pages, 3 figures, 1 table + SI in source files
Natural selection. III. Selection versus transmission and the levels of selection
Creators: name: Frank, Steven A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: FOS: Biological sciences

description: George Williams defined an evolutionary unit as hereditary information for which the selection bias between competing units dominates the informational decay caused by imperfect transmission. In this article, I extend Williams' approach to show that the ratio of selection bias to transmission bias provides a unifying framework for diverse biological problems. Specific examples include Haldane and Lande's mutation-selection balance, Eigen's error threshold and quasispecies, Van Valen's clade selection, Price's multilevel formulation of group selection, Szathmary and Demeter's evolutionary origin of primitive cells, Levin and Bull's short-sighted evolution of HIV virulence, Frank's timescale analysis of microbial metabolism, and Maynard Smith and Szathmary's major transitions in evolution. The insights from these diverse applications lead to a deeper understanding of kin selection, group selection, multilevel evolutionary analysis, and the philosophical problems of evolutionary units and individuality.
Supercharged AdS${}_3$ Holography
Creators: name: Rawash, Sami
name: Turton, David
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Given an asymptotically Anti-de Sitter supergravity solution, one can obtain a microscopic interpretation by identifying the corresponding state in the holographically dual conformal field theory. This is of particular importance for heavy pure states that are candidate black hole microstates. Expectation values of light operators in such heavy CFT states are encoded in the asymptotic expansion of the dual bulk configuration. In the D1-D5 system, large families of heavy pure CFT states have been proposed to be holographically dual to smooth horizonless supergravity solutions. We derive the precision holographic dictionary in a new sector of light operators that are superdescendants of scalar chiral primaries of dimension (1,1). These operators involve the action of the supercharges of the chiral algebra, and they play a central role in the proposed holographic description of recently-constructed supergravity solutions known as "supercharged superstrata". We resolve the mixing of single-trace and multi-trace operators in the CFT to identify the combinations that are dual to single-particle states in the bulk. We identify the corresponding gauge-invariant combinations of supergravity fields. We use this expanded dictionary to probe the proposed holographic description of supercharged superstrata, finding precise agreement between gravity and CFT.
description: 50 pages, v3: typos fixed
title: Evidenzbasierte Analyse zum Nutzen eines Navigationssystemes bei Nasen und Nasennebenhöhleneingriffen
Creators: name: Stolle, Stefan R. O.
name: Limmer, K.
name: Lenarz, Thomas
name: Majdani, Omid
Publisher: name: German Medical Science GMS Publishing House
Year: 2016
Subjects: subject: 610 Medical sciences; Medicine

description: Einleitung: Evidenzbasierte Analysen zum tatsächlich resultierenden Nutzen der Navigationstechnologie sind bislang nur in Teilaspekten vorhanden.    Methoden: In der vorliegenden Studie wurden daher Patienten mit chronischer Polyposis der NNH untersucht. Gruppe A: OP unter Navigation. Gruppe B:[zum vollständigen Text gelangen Sie über die oben angegebene URL]
description: 87. Jahresversammlung der Deutschen Gesellschaft für Hals-Nasen-Ohren-Heilkunde, Kopf- und Hals-Chirurgie
Helping both ways in housing administration: Inuit middlemen in the Arctic
Creators: name: Redgrave, Robert C.
Publisher: name: University of Calgary
Year: 1985
Subjects: subject: E 92 H58 R43 1986
subject: Inuit - Northwest Territories - Housing
subject: Housing management - Northwest Territories
subject: Middle management - Northwest Territories

description: Bibliography: p. 148-156.
title: Transorale Laryngektomie unterstützt durch das ‚Flex-System‘ – eine Pilotstudie
Creators: name: Schuler, Patrick
name: Friedrich, Daniel
name: Veit, Johannes
name: Greve, Jens
name: Rotter, Nicole
name: Scheithauer, Marc
name: Hoffmann, Thomas
Publisher: name: German Medical Science GMS Publishing House
Year: 2016
Subjects: subject: 610 Medical sciences; Medicine

description: Einführung: Die Salvage-Laryngektomie nach erfolgloser Radio(chemo)therapie oder bei postradiogenem dysfunktionalen Larynx ist ein operatives Verfahren mit hohem Risiko der Wundheilungsstörung und langwieriger mukokutaner Fistelbildung. Neben der Insertion von nichtbestrahlten Gewebe, z.B.[zum vollständigen Text gelangen Sie über die oben angegebene URL]
description: 87. Jahresversammlung der Deutschen Gesellschaft für Hals-Nasen-Ohren-Heilkunde, Kopf- und Hals-Chirurgie
Optimal Linear Shrinkage Estimator for Large Dimensional Precision Matrix
Creators: name: Bodnar, Taras
name: Gupta, Arjun K.
name: Parolya, Nestor
Publisher: name: arXiv
Year: 2013
Subjects: subject: Statistics Theory (math.ST)
subject: Probability (math.PR)
subject: Statistical Finance (q-fin.ST)
subject: FOS: Mathematics
subject: FOS: Economics and business

description: In this work we construct an optimal shrinkage estimator for the precision matrix in high dimensions. We consider the general asymptotics when the number of variables $p\rightarrow\infty$ and the sample size $n\rightarrow\infty$ so that $p/n\rightarrow c\in (0, +\infty)$. The precision matrix is estimated directly, without inverting the corresponding estimator for the covariance matrix. The recent results from the random matrix theory allow us to find the asymptotic deterministic equivalents of the optimal shrinkage intensities and estimate them consistently. The resulting distribution-free estimator has almost surely the minimum Frobenius loss. Additionally, we prove that the Frobenius norms of the inverse and of the pseudo-inverse sample covariance matrices tend almost surely to deterministic quantities and estimate them consistently. At the end, a simulation is provided where the suggested estimator is compared with the estimators for the precision matrix proposed in the literature. The optimal shrinkage estimator shows significant improvement and robustness even for non-normally distributed data.
description: 26 pages, 5 figures. This version includes the case c>1 with the generalized inverse of the sample covariance matrix. The abstract was updated accordingly
Non-Markovian dynamics under time-translation symmetry
Creators: name: Dann, Roie
name: Megier, Nina
name: Kosloff, Ronnie
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: A dynamical symmetry is employed to determine the structure of the quantum non-Markovian time-local master equation. Such a structure is composed from two components: scalar kinetic coefficients and the standard quantum Markovian operator form. The kinetic coefficients are generally time-dependent and incorporate information on the kinematics and memory effects, while the operators manifest the dynamical symmetry. Specifically, we focus on time-translation symmetric dynamics, where the Lindblad jump operators constitute the eigenoperators of the free dynamics. This symmetry is motivated by thermodynamic microscopic considerations, where strict energy conservation between system and environment imposes the time-translation symmetry. The construction is generalized to other symmetries, and to driven quantum systems. The formalism is illustrated by three exactly solvable non-Markovian models, where the exact reduced description exhibits a dynamical symmetric structure. The formal structure of the master equation leads to a first principle calculation of the exact kinetic coefficients. This opens the possibility to simulate in a modular fashion non-Markovian dynamics.
GAN-Based LiDAR Intensity Simulation
Creators: name: Marcus, Richard
name: Gabel, Felix
name: Knoop, Niklas
name: Stamminger, Marc
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Image and Video Processing (eess.IV)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Realistic vehicle sensor simulation is an important element in developing autonomous driving. As physics-based implementations of visual sensors like LiDAR are complex in practice, data-based approaches promise solutions. Using pairs of camera images and LiDAR scans from real test drives, GANs can be trained to translate between them. For this process, we contribute two additions. First, we exploit the camera images, acquiring segmentation data and dense depth maps as additional input for training. Second, we test the performance of the LiDAR simulation by testing how well an object detection network generalizes between real and synthetic point clouds to enable evaluation without ground truth point clouds. Combining both, we simulate LiDAR point clouds and demonstrate their realism.
Structural reliability under uncertainty in moments: distributionally-robust reliability-based design optimization
Creators: name: Kanno, Yoshihiro
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: This paper considers structural optimization under a reliability constraint, where the input distribution is only partially known. Specifically, when we only know that the expected value vector and the variance-covariance matrix of the input distribution belong to a given convex set, we require that, for any realization of the input distribution, the failure probability of a structure should be no greater than a specified target value. We show that this distributionally-robust reliability constraint can be reduced equivalently to deterministic constraints. By using this reduction, we can treat a reliability-based design optimization problem under the distributionally-robust reliability constraint within the framework of deterministic optimization, specifically, nonlinear semidefinite programming. Two numerical examples are solved to show relation between the optimal value and either the target reliability or the uncertainty magnitude.
title: Tracheobronchopathia osteochondroplastica: a cause of difficulte intubation
Creators: name: Coric, Adi
name: Arslanagic, Rusmir
name: Arslanagic, Selma
name: Vele, Esved
Publisher: name: German Medical Science GMS Publishing House
Year: 2016
Subjects: subject: 610 Medical sciences; Medicine

description: Tracheobronchopathia osteochondroplastica (TPO) is a rare benign disorder of the lower part of the trachea and the upper part of the main bronchii. It was first described in the middle of the 19th century and since then, approximately 300 cases have been reported. A higher incidence on TPO was seen [for full text, please go to the a.m. URL]
description: 87. Jahresversammlung der Deutschen Gesellschaft für Hals-Nasen-Ohren-Heilkunde, Kopf- und Hals-Chirurgie
Quantifying Quantumness of Channels Without Entanglement
Creators: name: Ku, Huan-Yu
name: Kadlec, Josef
name: Černoch, Antonín
name: Quintino, Marco Túlio
name: Zhou, Wenbin
name: Lemr, Karel
name: Lambert, Neill
name: Miranowicz, Adam
name: Chen, Shin-Liang
name: Nori, Franco
name: Chen, Yueh-Nan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum channels breaking entanglement, incompatibility, or nonlocality are defined as such because they are not useful for entanglement-based, one-sided device-independent, or device-independent quantum information processing, respectively. Here, we show that such breaking channels are related to complementary tests of macrorealism i.e., temporal separability, channel unsteerability, temporal unsteerability, and the temporal Bell inequality. To demonstrate this we first define a steerability-breaking channel, which is conceptually similar to entanglement and nonlocality-breaking channels and prove that it is identical to an incompatibility-breaking channel. A hierarchy of quantum non-breaking channels is derived, akin to the existing hierarchy relations for temporal and spatial quantum correlations. We then introduce the concept of channels that break temporal correlations, explain how they are related to the standard breaking channels, and prove the following results: (1) A robustness-based measure for non-entanglement-breaking channels can be probed by temporal nonseparability. (2) A non-steerability-breaking channel can be quantified by channel steering. (3) Temporal steerability and non-macrorealism can be used for, respectively, distinguishing unital steerability-breaking channels and nonlocality-breaking channels for a maximally entangled state. Finally, a two-dimensional depolarizing channel is experimentally implemented as a proof-of-principle example to demonstrate the hierarchy relation of non-breaking channels using temporal quantum correlations
description: Comments welcome
Red backs and white burdens: a study of white attitudes towards Indians in Southern Alberta, 1896-1911
Creators: name: Regular, W. Keith, 1952-
Publisher: name: University of Calgary
Year: 1985
Subjects: subject: E 78 C2 R43 1986
subject: Indians of North America - Alberta, Southern - Cultural assimilation
subject: Indians, Treatment of - Alberta, Southern
subject: Indians of North America - Alberta, Southern - Government relations

description: Bibliography: p. 185-196.
On the impact of Performance Antipatterns in multi-objective software model refactoring optimization
Creators: name: Cortellessa, Vittorio
name: Di Pompeo, Daniele
name: Stoico, Vincenzo
name: Tucci, Michele
Publisher: name: arXiv
Year: 2021
Subjects: subject: Software Engineering (cs.SE)
subject: Performance (cs.PF)
subject: FOS: Computer and information sciences

description: Software quality estimation is a challenging and time-consuming activity, and models are crucial to face the complexity of such activity on modern software applications. One main challenge is that the improvement of distinctive quality attributes may require contrasting refactoring actions on an application, as for trade-off between performance and reliability. In such cases, multi-objective optimization can provide the designer with a wider view on these trade-offs and, consequently, can lead to identify suitable actions that take into account independent or even competing objectives. In this paper, we present an approach that exploits the NSGA-II multi-objective evolutionary algorithm to search optimal Pareto solution frontiers for software refactoring while considering as objectives: i) performance variation, ii) reliability, iii) amount of performance antipatterns, and iv) architectural distance. The algorithm combines randomly generated refactoring actions into solutions (i.e., sequences of actions) and compares them according to the objectives. We have applied our approach on a train ticket booking service case study, and we have focused the analysis on the impact of performance antipatterns on the quality of solutions. Indeed, we observe that the approach finds better solutions when antipatterns enter the multi-objective optimization. In particular, performance antipatterns objective leads to solutions improving the performance by up to 15% with respect to the case where antipatterns are not considered, without affecting the solution quality on other objectives.
CORS Baade-Wesselink distance to the LMC NGC 1866 blue populous cluster
Creators: name: Molinaro, R.
name: Ripepi, V.
name: Marconi, M.
name: Musella, I.
name: Brocato, E.
name: Mucciarelli, A.
name: Stetson, P. B.
name: Storm, J.
name: Walker, A. R.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We used Optical, Near Infrared photometry and radial velocity data for a sample of 11 Cepheids belonging to the young LMC blue populous cluster NGC 1866 to estimate their radii and distances on the basis of the CORS Baade-Wesselink method. This technique, based on an accurate calibration of the surface brightness as a function of (U-B), (V-K) colors, allows us to estimate, simultaneously, the linear radius and the angular diameter of Cepheid variables, and consequently to derive their distance. A rigorous error estimate on radius and distances was derived by using Monte Carlo simulations. Our analysis gives a distance modulus for NGC 1866 of 18.51+/-0.03 mag, which is in agreement with several independent results.
description: 21 pages, 10 figures, Accepted for publication in the Astrophysical Journal
Trike: design of a practical human powered vehicle
Creators: name: Van Engelen, Fernd
Publisher: name: Environmental Design
Year: 1986

description: Bibliography: p. 57-58.
description: Human powered vehicles powered by a single rider have reached speeds exceeding 100 km/h on level ground. Such vehicles are extremely aerodynamically efficient but are lacking in safety, maneuverability, visibility, ventilation and rider comfort. It has been the purpose of this Master's Degree Project to design a practical human powered vehicle, partly in response to the great accomplishments of these vehicles on the race track and partly in response to their failure on the city streets. Two full scale working prototypes were designed, constructed and tested. These led to a final design proposal which is presented in the form of a scale model. Recommendations have been made regarding further steps required for commercialization of the product.
title: Automatisierte Bewertung von auf konfokaler Laserendomikroskopie (CLE) basierten Bildern des Stimmlippenepithels mittels Mustererkennung
Creators: name: Dittberner, Andreas
name: Goncalves, Miguel
name: Bohr, Christopher
name: Iro, Heinrich
Publisher: name: German Medical Science GMS Publishing House
Year: 2016
Subjects: subject: 610 Medical sciences; Medicine

description: Einleitung: Goldstandard bei der Diagnostik von Läsionen des oberen ADT ist nach wie vor die Untersuchung mit Weißlicht und anschließender invasiver Gewebebiopsie. Zahlreiche optische Verfahren wurden in den letzten Jahren auf ihre Anwendbarkeit und Aussagekraft getestet, die Sicherheit[zum vollständigen Text gelangen Sie über die oben angegebene URL]
description: 87. Jahresversammlung der Deutschen Gesellschaft für Hals-Nasen-Ohren-Heilkunde, Kopf- und Hals-Chirurgie
Estimation of the Global Minimum Variance Portfolio in High Dimensions
Creators: name: Bodnar, Taras
name: Parolya, Nestor
name: Schmid, Wolfgang
Publisher: name: arXiv
Year: 2014
Subjects: subject: Statistical Finance (q-fin.ST)
subject: Statistics Theory (math.ST)
subject: Portfolio Management (q-fin.PM)
subject: FOS: Economics and business
subject: FOS: Mathematics

description: We estimate the global minimum variance (GMV) portfolio in the high-dimensional case using results from random matrix theory. This approach leads to a shrinkage-type estimator which is distribution-free and it is optimal in the sense of minimizing the out-of-sample variance. Its asymptotic properties are investigated assuming that the number of assets $p$ depends on the sample size $n$ such that $\frac{p}{n}\rightarrow c\in (0,+\infty)$ as $n$ tends to infinity. The results are obtained under weak assumptions imposed on the distribution of the asset returns, namely it is only required the fourth moments existence. Furthermore, we make no assumption on the upper bound of the spectrum of the covariance matrix. As a result, the theoretical findings are also valid if the dependencies between the asset returns are described by a factor model which appears to be very popular in financial literature nowadays. This is also well-documented in a numerical study where the small- and large-sample behavior of the derived estimator are compared with existing estimators of the GMV portfolio. The resulting estimator shows significant improvements and it turns out to be robust to the deviations from normality.
description: 38 pages inc. 16 figures. Revised and corrected version
Decoherence in the three-state quantum walk
Creators: name: Tude, Luísa Toledo
name: de Oliveira, Marcos C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum walks are dynamic systems with a wide range of applications in quantum computation and quantum simulation of analog systems, therefore it is of common interest to understand what changes from an isolated process to one embedded in an environment. In the present work, we analyze the decoherence in a three-state uni-dimensional quantum walk. The approaches taken into consideration to account for the environment effects are phase and amplitude damping Kraus operators, unitary noise on the coin space, and broken links.
Constraining parameters of low mass merging compact binary systems with Einstein Telescope alone
Creators: name: Singh, Neha
name: Bulik, Tomasz
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The Einstein Telescope (ET), a future third-generation gravitational wave detector will have detection sensitivity for gravitational wave signals down to 1 Hz. This improved low-frequency sensitivity of the ET will allow the observation of low mass binaries for a longer period of time in the detection band before their merger. Because of an improved sensitivity as compared to current and advanced 2G detectors, the detection rate will also be greatly improved. Given the high detection rate of merging compact binaries with the ET, it will be a useful instrument to conduct population studies. In this paper we present an algorithm to estimate the parameters of the low mass merging compact binary systems such as localization, chirp mass, redshift, mass ratios and total mass of the source which are crucial in order to estimate the capability of the ET to study various compact binary populations. For the compact binary population distributed uniformly in comoving volume we find that with single ET, $\approx 1\%$ of binaries can be localized within 800 square degrees. The values of chirp mass and total mass can be constrained within $\lesssim 5\%$ error, while $z$ and $D_L$ can be estimated with an error of $\lesssim 15\%$ for effective SNR $\gtrsim 50$ using single ET.
description: 24 pages, 16 figures. Published in Physical Review D
Self-Consistent Approximations for Superconductivity beyond the Bardeen-Cooper-Schrieffer Theory
Creators: name: Kita, Takafumi
Publisher: name: arXiv
Year: 2011
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We develop a concise self-consistent perturbation expansion for superconductivity where all the pair processes are naturally incorporated without drawing "anomalous" Feynman diagrams. This simplification results from introducing an interaction vertex that is symmetric in the particle-hole indices besides the ordinary space-spin coordinates. The formalism automatically satisfies conservation laws, includes the Luttinger-Ward theory as the normal-state limit, and reproduces the Bardeen-Cooper-Schrieffer theory as the lowest-order approximation. It enables us to study the thermodynamic, single-particle, two-particle, and dynamical properties of superconductors with competing fluctuations based on a single functional $Φ[\hat{G}]$ of Green's function $\hat{G}$ in the Nambu space. Specifically, we derive closed equations in the FLEX-S approximation, i.e., the fluctuation exchange approximation for superconductivity with all the pair processes, which contains extra terms besides those in the standard FLEX approximation.
description: 14 pages, 6 figures