cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
MPEC 2023-W137 : 2019 SB235
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2019 SB235

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Convergence behaviour of single stage flash calculations
Creators: name: Rijkers, M. P. W. (Marinus Petrus Wilhelmus), 1960-
Publisher: name: University of Calgary
Year: 1985
Subjects: subject: QA 295 R53 1986
subject: Convergence
subject: Fluid dynamics
subject: Thermodynamics
subject: Algorithms

description: Bibliography: p. 100-103.
description: In this dissertation the convergence behaviour of single stage phase split calculations is investigated to determine which factors cause a flash routine (1) to converge to the trivial solution and (2) to converge very slowly or not at all. For four different mixtures, approximately 50,000 independent flash calculations were executed at variable temperatures, pressures and initial guesses for the phase distribution coefficients. For all four mixtures, the conventional successive substitution algorithm as described by Null (1970) was implemented. For one mixture the calculations were repeated using an accelerated version of the successive substitution algorithm proposed by Mehra et al (1983). At low pressures, convergence to a correct solution can readily be achieved by applying Raoult's law initial guesses, independent of the temperature and the algorithm used to converge the flash calculation, at least for the mixtures studied here. At pressures above the mixture critical pressure the trivial solution was encountered only rarely with Raoult's law initial guesses when the conventional successive substitution method was used. If an accelerated method was used, however, no trivial solutions occured. In order to test the speed of convergence and the computational efficiency of flash calculations, a large number of flash calculations were performed within the two-phase region of a 7 component mixture. Three different but related first order methods and one second order method (Newton-Raphson iteration) were used to solve flash calculations throughout the two-phase region, starting with a Raoult's law initial guess. Both in the low and high pressure regions points of slow convergence were observed. At low pressures, retardation in the speed of convergence was caused by the appearance of trivial roots in the Peng-Robinson equation of state. At high pressures slow convergence was apparently related to the nature of the free energy surface. In terms of computational efficiency the accelerated methods performed best. The Newton- Raphson method exhibited numerical problems in the critical and isobaric regions, which resulted in occurences of the trivial solution and convergence failures. Convergence problems also occured when poor guesses were provided for the phase distribution coefficients. In some cases an oscillatory behaviour of the iteration variables between the correct solution and the trivial solution was observed.
Polarization of thermal molecular lines in the envelope of IK Tau
Creators: name: Vlemmings, W. H. T.
name: Ramstedt, S.
name: Rao, R.
name: Maercker, M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Molecular line polarization is a unique source of information about the magnetic fields and anisotropies in the circumstellar envelopes of evolved stars. Here we present the first detection of thermal CO(J=2-1) and SiO(J=5-4, v=0) polarization, in the envelope of the asymptotic giant branch star IK Tau. The observed polarization direction does not match predictions for circumstellar envelope polarization induced only by an anisotropic radiation field. Assuming that the polarization is purely due to the Goldreich-Kylafis effect, the linear polarization direction is defined by the magnetic field as even the small Zeeman splitting of CO and SiO dominates the molecular collisional and spontaneous emission rates. The polarization was mapped using the Submillimeter Array (SMA) and is predominantly north-south. There is close agreement between the CO and SiO observations, even though the CO polarization arises in the circumstellar envelope at ~800 AU and the SiO polarization at <250 AU. If the polarization indeed traces the magnetic field, we can thus conclude that it maintains a large-scale structure throughout the circumstellar envelope. We propose that the magnetic field, oriented either east-west or north-south is responsible for the east-west elongation of the CO distribution and asymmetries in the dust envelope. In the future, the Atacama Large Millimeter/submillimeter Array will be able to map the magnetic field using CO polarization for a large number of evolved stars.
description: 5 pages, 4 figures, accepted for publication in A&A Letters
An End-to-End Performance Comparison of Seven Permissioned Blockchain Systems
Creators: name: Geyer, Frank Christian
name: Jacobsen, Hans-Arno
name: Mayer, Ruben
name: Mandl, Peter
Publisher: name: arXiv
Year: 2023
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: The emergence of more and more blockchain solutions with innovative approaches to optimising performance, scalability, privacy and governance complicates performance analysis. Reasons for the difficulty of benchmarking blockchains include, for example, the high number of system parameters to configure and the effort to deploy a blockchain network. In addition, performance data, which mostly comes from system vendors, is often intransparent. We investigate and evaluate the performance of seven permissioned blockchain systems using different parameter settings in a reproducible manner. We employ an end-to-end approach, where the clients sending the transactions are fully involved in the data collection approach. Our results highlight the peculiarities and limitations of the systems under investigation. Due to the insights given, our work forms the basis for continued research to optimise the performance of blockchain systems.
description: 14 pages, 5 figures, 20 tables, Middleware Conference
Phonon Quasidiffusion in Cryogenic Dark Matter Search Large Germanium Detectors
Creators: name: Leman, S. W.
name: Cabrera, B.
name: McCarthy, K. A.
name: Pyle, M.
name: Resch, R.
name: Sadoulet, B.
name: Sundqvist, K. M.
name: Brink, P. L.
name: Cherry, M.
name: Silva, E. Do Couto E
name: Figueroa-Feliciano, E.
name: Mirabolfathi, N.
name: Serfass, B.
name: Tomada, A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Materials Science (cond-mat.mtrl-sci)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present results on quasidiffusion studies in large, 3 inch diameter, 1 inch thick [100] high purity germanium crystals, cooled to 50 mK in the vacuum of a dilution refrigerator, and exposed with 59.5 keV gamma-rays from an Am-241 calibration source. We compare data obtained in two different detector types, with different phonon sensor area coverage, with results from a Monte Carlo. The Monte Carlo includes phonon quasidiffusion and the generation of phonons created by charge carriers as they are drifted across the detector by ionization readout channels.
description: 13 pages, 12 figures, PHONONS201 conference proceedings; http://psroc.phys.ntu.edu.tw/cjp/download.php?d=4&pid=2718
The double sub-giant branch of NGC 6656 (M22): a chemical characterization
Creators: name: Marino, A. F.
name: Milone, A. P.
name: Sneden, C.
name: Bergemann, M.
name: Kraft, R. P.
name: Wallerstein, G.
name: Cassisi, S.
name: Aparicio, A.
name: Asplund, M.
name: Bedin, R. L.
name: Hilker, M.
name: Lind, K.
name: Momany, Y.
name: Piotto, G.
name: Roederer, I. U.
name: Stetson, P. B.
name: Zoccali, M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present an abundance analysis of 101 subgiant branch (SGB) stars in the globular cluster M22. Using low resolution FLAMES/GIRAFFE spectra we have determined abundances of the neutron-capture strontium and barium and the light element carbon. With these data we explore relationships between the observed SGB photometric split in this cluster and two stellar groups characterized by different contents of iron, slow neutron-capture process (s-process) elements, and the alpha element calcium, that we previously discovered in M22's red-giant stars. We show that the SGB stars correlate in chemical composition and color-magnitude diagram position: the stars with higher metallicity and relative s-process abundances define a fainter SGB, while stars with lower metallicity and s-process content reside on a relatively brighter SGB. This result has implications for the relative ages of the two stellar groups of M22. In particular, it is inconsistent with a large spread in ages of the two SGBs. By accounting for the chemical content of the two stellar groups, isochrone fitting of the double SGB suggests that their ages are not different by more than 300 Myr.
description: 21 pages, 12 figures, accepted for publication in A&A
The Circumferential vision: love and death in the poetry of Emily Dickinson
Creators: name: Robinson, Jacqueline Jill, 1955-
Publisher: name: University of Calgary
Year: 1985
Subjects: subject: PS 1541 Z5 R62 1986
subject: Dickinson, Emily, 1830-1886 - Poetic works
subject: Love in literature
subject: Death in literature

description: Bibliography: p. 127-132.
Centaurus A as a point source of Ultra-High Energy Cosmic Rays
Creators: name: Kim, Hang Bae
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We probe the possibility that Centaurus A (Cen A) is a point source of ultra-high energy cosmic rays (UHECR) observed by PAO, through the statistical analysis of the arrival direction distribution. For this purpose, we set up the Cen A dominance model for the UHECR sources, in which Cen A contributes the fraction $f_{\rm C}$ of the whole UHECR with energy above $5.5\times10^{19}\,{\rm eV}$ and the isotropic background contributes the remaining $1-f_{\rm C}$ fraction. The effect of the intergalactic magnetic fields on the bending of the trajectory of Cen A originated UHECR is parameterized by the gaussian smearing angle $θ_s$. Using the correlational angular distance distribution (CADD), we identify the excess of UHECR in the Cen A direction and fit the CADD of the observed PAO data by varying two parameters $f_{\rm C}$ and $θ_s$ of the Cen A dominance model. The best-fit parameter values are $f_{\rm C}\approx0.1$ (The corresponding Cen A fraction observed at PAO is $f_{\rm C,PAO}\approx0.15$, that is, about 10 out of 69 UHECR.) and $θ_s=5^\circ$ with the maximum probability $P_{\rm max}=0.29$. Considering the uncertainty concerning the assumption of isotropic background in the Cen A dominance model, we extend the viable parameter ranges to the $2σ$ band, $0.09\lesssim f_{\rm C,PAO}\lesssim 0.25$ and $0^\circ\lesssim θ_s\lesssim 20^\circ$. This result supports the existence of a point source extended by the intergalactic magnetic fields in the direction of Cen A. If Cen A is actually the source responsible for the observed excess of UHECR, the average deflection angle of the excess UHECR implies the order of $10\,{\rm nG}$ intergalactic magnetic field in the vicinity of Cen A.
description: 12 pages, 7 figures
Special MMP for log canonical generalised pairs
Creators: name: Lazić, Vladimir
name: Tsakanikas, Nikolaos
name: Jiang, with an appendix joint with Xiaowei
Publisher: name: arXiv
Year: 2021
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14E30

description: We show that minimal models of $\mathbb{Q}$-factorial NQC log canonical generalised pairs exist, assuming the existence of minimal models of smooth varieties. More generally, we prove that on a $\mathbb{Q}$-factorial NQC log canonical generalised pair $ (X,B+M) $ we can run an MMP with scaling of an ample divisor which terminates, assuming that it admits an NQC weak Zariski decomposition or that $K_X+B+M$ is not pseudoeffective. As a consequence, we establish several existence results for minimal models and Mori fibre spaces.
description: v5: minor changes in the appendix; to appear in Sel. Math. New Ser
title: Endoscopic repair of pharyngocutaneous fistula following laryngectomy
Creators: name: Iliev, Petar
name: Nikiforova, Lora
name: Sapundzhiev, Nikolai
name: Petrov, Petar
name: Ivanova, Darina
Publisher: name: German Medical Science GMS Publishing House
Year: 2016
Subjects: subject: 610 Medical sciences; Medicine

description: Introduction: Pharyngocutaneous fistula (PCF) is a typical complication after total laryngectomy, which is predominantly conservatively managed. A surgical treatment is required when the fistula has a large orifice and/or a substantial loss of surrounding soft tissue is present.     Objective: [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
Cosmic evolution of the logarithmic f(R) model and the dS swampland conjecture
Creators: name: Sadeghi, J.
name: Pourhassan, B.
name: Gashti, S. Noori
name: Mezerji, E. Naghd
name: Pasqua, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper, we study the inflationary scenario in logarithmic f(R) gravity, where the rate of inflation roll is constant. On the other hand, our gravitational f(R) model is a polynomial plus a logarithmic term. We take advantage of constant-roll conditions and investigate the cosmic evolution of the logarithmic f(R) gravity. Therefore, we plot some figures such as the scalar spectrum index $n_{s}$ and tensor-to-scaler ratio $r$ concerning $n$, $β$ and model's constant parameters, i.e., $α$, $θ$ and $γ$ respectively. Also, we obtain the potential by using the constant roll condition. We know that the potential value obtained with this condition has an exact value. Next, we challenge it with refined swampland conjecture with respect to the Planck data. Finally, we compare our results with the experimental data, especially Planck 2018.
description: 20pages, 5 figures
title: Laserchirurgie beim Zenker-Divertikel
Creators: name: Papaspyrou, Georgios
name: Schick, Bernhard
name: Al Kadah, Basel
Publisher: name: German Medical Science GMS Publishing House
Year: 2016
Subjects: subject: 610 Medical sciences; Medicine

description: Einleitung: Die Chirurgie gilt in der Behandlung des Zenker-Divertikels als Goldstandard. Ziel dieser Studie war, die Rolle der Laserchirurgie bei Patienten mit Zenker-Divertikel in den letzten 10 Jahren aus unserer Klinik zu untersuchen.    Methoden: Eine retrospektive Analyse erfolgte bei 49 Patienten,[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
Additive triples of bijections, or the toroidal semiqueens problem
Creators: name: Eberhard, Sean
name: Manners, Freddie
name: Mrazović, Rudi
Publisher: name: arXiv
Year: 2015
Subjects: subject: Combinatorics (math.CO)
subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: We prove an asymptotic for the number of additive triples of bijections $\{1,\dots,n\}\to\mathbb{Z}/n\mathbb{Z}$, that is, the number of pairs of bijections $π_1,π_2\colon \{1,\dots,n\}\to\mathbb{Z}/n\mathbb{Z}$ such that the pointwise sum $π_1+π_2$ is also a bijection. This problem is equivalent to counting the number of orthomorphisms or complete mappings of $\mathbb{Z}/n\mathbb{Z}$, to counting the number of arrangements of $n$ mutually nonattacking semiqueens on an $n\times n$ toroidal chessboard, and to counting the number of transversals in a cyclic Latin square. The method of proof is a version of the Hardy--Littlewood circle method from analytic number theory, adapted to the group $(\mathbb{Z}/n\mathbb{Z})^n$.
description: 22 pages
Learning C to x86 Translation: An Experiment in Neural Compilation
Creators: name: Armengol-Estapé, Jordi
name: O'Boyle, Michael F. P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Programming Languages (cs.PL)
subject: FOS: Computer and information sciences

description: Deep learning has had a significant impact on many fields. Recently, code-to-code neural models have been used in code translation, code refinement and decompilation. However, the question of whether these models can automate compilation has yet to be investigated. In this work, we explore neural compilation, building and evaluating Transformer models that learn how to produce x86 assembler from C code. Although preliminary results are relatively weak, we make our data, models and code publicly available to encourage further research in this area.
description: Published in AIPLANS 2021
Multi-Variant Execution at the Edge
Creators: name: Cabrera-Arteaga, Javier
name: Laperdrix, Pierre
name: Monperrus, Martin
name: Baudry, Benoit
Publisher: name: arXiv
Year: 2021
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Edge-cloud computing offloads parts of the computations that traditionally occurs in the cloud to edge nodes,e.g., CDN servers, in order to get closer to the users and reduce latency. To improve performance even further, WebAssembly is increasingly used in this context. Edge-cloud computing providers, such as Fastly or Cloudflare, let their clients deploy stateless services in the form of WebAssembly binaries, which are then translated to machine code and sandboxed for a safe execution at the edge. In this context, we propose a technique that (i) automatically diversifies WebAssembly binaries that are deployed to the edge and (ii) randomizes execution paths at runtime, turning the execution of the services into a moving target. Given a service tobe deployed at the edge, we automatically synthesize functionally equivalent variants for the functions that implement the service.All the variants are then wrapped into a single multivariant WebAssembly binary. When the service endpoint is executed,every time a function is invoked, one of its variants is randomly selected. We implement this technique in the MEWE tool and we validate it with 7 services for cryptography and QR encoding. MEWE generates multivariant binaries that embed hundreds of function variants. We execute the multivariant binaries on the worldwide edge platform provided by Fastly. We show that,at runtime, the multivariant exhibit a remarkable diversity ofexecution traces, across the whole edge platform.
Understanding Algorithm Performance on an Oversubscribed Scheduling Application
Creators: name: Barbulescu, L.
name: Howe, A. E.
name: Roberts, M.
name: Whitley, L. D.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: The best performing algorithms for a particular oversubscribed scheduling application, Air Force Satellite Control Network (AFSCN) scheduling, appear to have little in common. Yet, through careful experimentation and modeling of performance in real problem instances, we can relate characteristics of the best algorithms to characteristics of the application. In particular, we find that plateaus dominate the search spaces (thus favoring algorithms that make larger changes to solutions) and that some randomization in exploration is critical to good performance (due to the lack of gradient information on the plateaus). Based on our explanations of algorithm performance, we develop a new algorithm that combines characteristics of the best performers; the new algorithms performance is better than the previous best. We show how hypothesis driven experimentation and search modeling can both explain algorithm performance and motivate the design of a new algorithm.
Central limit theorems for functionals of large sample covariance matrix and mean vector in matrix-variate location mixture of normal distributions
Creators: name: Bodnar, Taras
name: Mazur, Stepan
name: Parolya, Nestor
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 62H10, 62E15, 62E20, 60F05, 60B20

description: In this paper we consider the asymptotic distributions of functionals of the sample covariance matrix and the sample mean vector obtained under the assumption that the matrix of observations has a matrix-variate location mixture of normal distributions. The central limit theorem is derived for the product of the sample covariance matrix and the sample mean vector. Moreover, we consider the product of the inverse sample covariance matrix and the mean vector for which the central limit theorem is established as well. All results are obtained under the large-dimensional asymptotic regime where the dimension $p$ and the sample size $n$ approach to infinity such that $p/n\to c\in[0 , +\infty)$ when the sample covariance matrix does not need to be invertible and $p/n\to c\in [0, 1)$ otherwise.
description: 30 pages, 8 figures, 1st revision
Optimal shrinkage-based portfolio selection in high dimensions
Creators: name: Bodnar, Taras
name: Okhrin, Yarema
name: Parolya, Nestor
Publisher: name: arXiv
Year: 2016
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: In this paper we estimate the mean-variance portfolio in the high-dimensional case using the recent results from the theory of random matrices. We construct a linear shrinkage estimator which is distribution-free and is optimal in the sense of maximizing with probability $1$ the asymptotic out-of-sample expected utility, i.e., mean-variance objective function for different values of risk aversion coefficient which in particular leads to the maximization of the out-of-sample expected utility and to the minimization of the out-of-sample variance. One of the main features of our estimator is the inclusion of the estimation risk related to the sample mean vector into the high-dimensional portfolio optimization. The asymptotic properties of the new estimator are investigated when the number of assets $p$ and the sample size $n$ tend simultaneously to infinity such that $p/n \rightarrow c\in (0,+\infty)$. The results are obtained under weak assumptions imposed on the distribution of the asset returns, namely the existence of the $4+\varepsilon$ moments is only required. Thereafter we perform numerical and empirical studies where the small- and large-sample behavior of the derived estimator is investigated. The suggested estimator shows significant improvements over the existent approaches including the nonlinear shrinkage estimator and the three-fund portfolio rule, especially when the portfolio dimension is larger than the sample size. Moreover, it is robust to deviations from normality.
description: 45 pages, UPDATE3: revised version of the manuscript accepted by Journal of Business and Economic Statistics. substantially revised: Ledoit-Wolf and Kan-Zhou estimators were added, conditions weakened, proofs revised, discussion on the Moore-Penrose approximation included, mistake in the shrinkage formula for c>1 corrected (big boost in performance as a result)
Partial Domain Adaptation without Domain Alignment
Creators: name: Li, Weikai
name: Chen, Songcan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Unsupervised domain adaptation (UDA) aims to transfer knowledge from a well-labeled source domain to a different but related unlabeled target domain with identical label space. Currently, the main workhorse for solving UDA is domain alignment, which has proven successful. However, it is often difficult to find an appropriate source domain with identical label space. A more practical scenario is so-called partial domain adaptation (PDA) in which the source label set or space subsumes the target one. Unfortunately, in PDA, due to the existence of the irrelevant categories in the source domain, it is quite hard to obtain a perfect alignment, thus resulting in mode collapse and negative transfer. Although several efforts have been made by down-weighting the irrelevant source categories, the strategies used tend to be burdensome and risky since exactly which irrelevant categories are unknown. These challenges motivate us to find a relatively simpler alternative to solve PDA. To achieve this, we first provide a thorough theoretical analysis, which illustrates that the target risk is bounded by both model smoothness and between-domain discrepancy. Considering the difficulty of perfect alignment in solving PDA, we turn to focus on the model smoothness while discard the riskier domain alignment to enhance the adaptability of the model. Specifically, we instantiate the model smoothness as a quite simple intra-domain structure preserving (IDSP). To our best knowledge, this is the first naive attempt to address the PDA without domain alignment. Finally, our empirical results on multiple benchmark datasets demonstrate that IDSP is not only superior to the PDA SOTAs by a significant margin on some benchmarks (e.g., +10% on Cl->Rw and +8% on Ar->Rw ), but also complementary to domain alignment in the standard UDA
description: 10 pages. IEEE Transactions on Pattern Analysis and Machine Intelligence,2022
Simple Numerical Model of Laminated Glass Beams
Creators: name: Zemanová, Alena
name: Zeman, Jan
name: Šejnoha, Michal
Publisher: name: arXiv
Year: 2012
Subjects: subject: Computational Engineering, Finance, and Science (cs.CE)
subject: FOS: Computer and information sciences

description: This contribution presents a simple Finite Element model aimed at efficient simulation of layered glass units. The adopted approach is based on considering independent kinematics of each layer, tied together via Lagrange multipliers. Validation and verification of the resulting model against independent data demonstrate its accuracy, showing its potential for generalization towards more complex problems.
description: 10 pages, 3 figures
title: Erste Erfahrungen mit dem NBI-System an der HNO-Klinik Erlangen
Creators: name: Scherl, Claudia
name: Ogadzanov, Anna
name: Agaimy, Abbas
name: Goncalves, Miguel
name: Dittberner, Andreas
name: Iro, Heinrich
name: Alexiou, Christoph
Publisher: name: German Medical Science GMS Publishing House
Year: 2016
Subjects: subject: 610 Medical sciences; Medicine

description: Einleitung: Das narrow band imaging (NBI) ist ein neues innovatives klinisches bildgebendes Verfahren, welches schmalbandiges Licht mit zwei Wellenlängen (415nm und 540nm) einsetzt. Es wird von Gefäßen absorbiert und von Schleimhaut reflektiert. Der dadurch entstandene Gefäßkontrast[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
`To Have What They are Having': Portfolio Choice for Mimicking Mean-Variance Savers
Creators: name: Golosnoy, Vasyl
name: Parolya, Nestor
Publisher: name: arXiv
Year: 2016
Subjects: subject: Portfolio Management (q-fin.PM)
subject: Mathematical Finance (q-fin.MF)
subject: FOS: Economics and business
subject: 91G10

description: We consider a group of mean-variance investors with mimicking desire such that each investor is willing to penalize deviations of his portfolio composition from compositions of other group members. Penalizing norm constraints are already applied for statistical improvement of Markowitz portfolio procedure in order to cope with estimation risk. We relate these penalties to individuals' wish of social learning and introduce a mutual fund (investment club) aggregating group member preferences unknown for individual savers. We derive the explicit analytical solution for the fund's optimal portfolio weights and show advantages to invest in such a fund for individuals willing to mimic.
description: 18 pages, 2 figures
ACCESS IV: The quenching of star formation in a cluster population of dusty S0s
Creators: name: Haines, C. P.
name: Merluzzi, P.
name: Busarello, G.
name: Dopita, M. A.
name: Smith, G. P.
name: La Barbera, F.
name: Gargiulo, A.
name: Raychaudhury, S.
name: Smith, R. J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present an analysis of the mid-infrared (MIR) colours of 165 70um-detected galaxies in the Shapley supercluster core (SSC) at z=0.048 using panoramic Spitzer/MIPS 24 and 70um imaging. While the bulk of galaxies show f70/f24 colours typical of local star-forming galaxies, we identify a significant sub-population of 23 70micron-excess galaxies, whose MIR colours (f70/f24>25) are much redder and cannot be reproduced by any of the standard model infrared SEDs. These galaxies are found to be strongly concentrated towards the cores of the five clusters that make up the SSC, and also appear rare among local field galaxies, confirming them as a cluster-specific phenomenon. Their optical spectra and lack of significant UV emission imply little or no ongoing star formation, while fits to their panchromatic SEDs require the far-IR emission to come mostly from a diffuse dust component heated by the general interstellar radiation field rather than ongoing star formation. Most of these 70micron-excess galaxies are identified as ~L* S0s with smooth profiles. We find that almost every cluster galaxy in the process of star-formation quenching is already either an S0 or Sa, while we find no passive galaxies of class Sb or later. Hence the formation of passive early-type galaxies in cluster cores must involve the prior morphological transformation of late-type spirals into Sa/S0s, perhaps via pre-processing or the impact of cluster tidal fields, before a subsequent quenching of star formation once the lenticular encounters the dense environment of the cluster core. In the cases of many cluster S0s, this phase of star-formation quenching is characterised by an excess of 70um emission, indicating that the cold dust content is declining at a slower rate than star formation.
description: 17 pages, 12 figures. Accepted for publication in MNRAS
title: Experimental setting for measurement and correction of optical distortion of rigid endoscopic systems
Creators: name: Shishkov, Savi
name: Stoyanov, Georgi
name: Sapundzhiev, Nikolay
name: Platikanov, Vilian
name: Kolev, Nikola
name: Mihov, Kalin
Publisher: name: German Medical Science GMS Publishing House
Year: 2016
Subjects: subject: 610 Medical sciences; Medicine

description: Aim: The endoscope armamentarium is a huge part of modern medicine. However, despite their wide applications, endoscopes are not without setbacks, the major one being image distortion caused by the nature of the lenses comprising the system. The aim of the current study is to present a methodology for[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
Nature of magnetic excitations in superconducting BaFe$_{1.9}$Ni$_{0.1}$As$_{2}$
Creators: name: Liu, Mengshu
name: Harriger, Leland W.
name: Luo, Huiqian
name: Wang, Meng
name: Ewings, R. A.
name: Guidi, T.
name: Park, Hyowon
name: Haule, Kristjan
name: Kotliar, Gabriel
name: Hayden, S. M.
name: Dai, Pengcheng
Publisher: name: arXiv
Year: 2012
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Since the discovery of the metallic antiferromagnetic (AF) ground state near superconductivity in iron-pnictide superconductors, a central question has been whether magnetism in these materials arises from weakly correlated electrons, as in the case of spin-density-wave in pure chromium, requires strong electron correlations, or can even be described in terms of localized electrons such as the AF insulating state of copper oxides. Here we use inelastic neutron scattering to determine the absolute intensity of the magnetic excitations throughout the Brillouin zone in electron-doped superconducting BaFe$_{1.9}$Ni$_{0.1}$As$_{2}$ ($T_c=20$ K), which allows us to obtain the size of the fluctuating magnetic moment $$, and its energy distribution. We find that superconducting BaFe$_{1.9}$Ni$_{0.1}$As$_{2}$ and AF BaFe$_2$As$_2$ both have fluctuating magnetic moments $\approx3.2\ μ_B^2$ per Fe(Ni), which are similar to those found in the AF insulating copper oxides. The common theme in both classes of high temperature superconductors is that magnetic excitations have partly localized character, thus showing the importance of strong correlations for high temperature superconductivity.
description: 10 pages, 6 figures, to be published in Nature Physics
title: Integrative Lehrkonzepte für die HNO-Heilkunde – Fördert eLearning das Interesse am Fach?
Creators: name: Dombrowski, Tobias
name: Minovi, Amir
name: Wrobel, Christian
name: Siedhoff, Alexander
name: Römer, Sabine
name: Dazert, Stefan
Publisher: name: German Medical Science GMS Publishing House
Year: 2016
Subjects: subject: 610 Medical sciences; Medicine

description: Die universitäre Lehre steht in kleinen Fächern wie der HNO-Heilkunde unter starken zeitlichen Limitationen. Durch integrative Lehrkonzepte nach dem „flipped-classroom“-Prinzip können Studierende sich, angepasst am eigenen Interesse, online auf Präsenzveranstaltungen[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
Tiny scale opacity fluctuations from VLBA, MERLIN and VLA observations of HI absorption toward 3C 138
Creators: name: Roy, Nirupam
name: Minter, Anthony H.
name: Goss, W. M.
name: Brogan, Crystal L.
name: Lazio, T. J. W.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The structure function of opacity fluctuations is a useful statistical tool to study tiny scale structures of neutral hydrogen. Here we present high resolution observation of HI absorption towards 3C 138, and estimate the structure function of opacity fluctuations from the combined VLA, MERLIN and VLBA data. The angular scales probed in this work are ~ 10-200 milliarcsec (about 5-100 AU). The structure function in this range is found to be well represented by a power law S_tau(x) ~ x^{beta} with index beta ~ 0.33 +/- 0.07 corresponding to a power spectrum P_tau(U) ~ U^{-2.33}. This is slightly shallower than the earlier reported power law index of ~ 2.5-3.0 at ~ 1000 AU to few pc scales. The amplitude of the derived structure function is a factor of ~ 20-60 times higher than the extrapolated amplitude from observation of Cas A at larger scales. On the other hand, extrapolating the AU scale structure function for 3C 138 predicts the observed structure function for Cas A at the pc scale correctly. These results clearly establish that the atomic gas has significantly more structures in AU scales than expected from earlier pc scale observations. Some plausible reasons are identified and discussed here to explain these results. The observational evidence of a shallower slope and the presence of rich small scale structures may have implications for the current understanding of the interstellar turbulence.
description: 6 pages, 5 figures. Accepted for publication in ApJ. The definitive version will be available at http://iopscience.iop.org/
Approximating tunneling rates in multi-dimensional field spaces
Creators: name: Masoumi, Ali
name: Olum, Ken D.
name: Wachter, Jeremy M.
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Quantum mechanics makes the otherwise stable vacua of a theory metastable through the nucleation of bubbles of the new vacuum. This in turn causes a first order phase transition. These cosmological phase transitions may have played an important role in settling our universe into its current vacuum, and they may also happen in future. The most important frameworks where vacuum decay happens contain a large number of fields. Unfortunately, calculating the tunneling rates in these models is very time-consuming. In this paper we present a simple approximation for the tunneling rate by reducing it to a one-field problem which is easy to calculate. We demonstrate the validity of this approximation using our recent code "Anybubble" for several classes of potentials.
description: 11 pages, 4 figures. v2: Replace right hand panel of figure 4 with a potential of the right form
Accelerating internal dimensions and nonzero positive cosmological constant
Creators: name: Park, Eun Kyung
name: Kwon, Pyung Seong
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present a new scenario for the moduli stabilization with a very small but nonzero positive cosmological constant $λ$. In this scenario the complex structure moduli are still stabilized by the three-form fluxes as in the usual flux compactifications, but the K$\ddot{\rm a}$hler modulus is not fixed by the KKLT scenario. In our case the scale factor (or the K$\ddot{\rm a}$hler modulus) of the internal dimensions is basically allowed to change with time. But at the supergravity level it is fixed by a set of dynamical (plus constraint) equations defined on the 4D spacetime, not by the nonperturbative corrections of KKLT. Also at the supergravity level it is shown that $λ$ is fine-tuned to zero, $λ=0$, by the same set of 4D equations. This result changes once we admit $α^{\prime}$-corrections of the string theory. The fine-tuning $λ=0$ changes into $λ= \frac{2}{3} Q$, where $Q$ is a constant representing quantum corrections of the brane and 6D action defined on the internal dimensions and its value is determined by the $α^{\prime}$-corrections. It is also shown that this nonzero $λ$ must be positive and at the same time the internal dimensions must evolve with time almost at the same rate as the external dimensions in the case of nonzero $λ$.
description: New sections have been added. Contents of the manuscript have been generally upgraded
Nasser's world view
Creators: name: Sabet, Amr G., 1957-
Publisher: name: University of Calgary
Year: 1985
Subjects: subject: DT 107.83 S32 1986
subject: Nasser, Gamal Abdel, 1918-1970 - Political and social views
subject: Egypt - Foreign relations

description: Bibliography: p. 188-191.
Regenerating WIMPs in the light of direct and indirect detection
Creators: name: Williams, Andrew J.
name: Boehm, Celine
name: West, Stephen M.
name: Vasquez, Daniel Albornoz
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: There are several ways to explain the dark matter relic density other than by the ordinary freeze-out scenario. For example, the freeze-in mechanism may constitute an alternative for generating the correct relic density for dark matter candidates whose predicted freeze-out abundance is too low due to a large total annihilation cross section. Here we show that although such a mechanism could explain why a dark matter candidate has the correct relic density, some candidates may still be ruled out because they would lead to a large gamma ray flux in dwarf spheroidal galaxies or a large elastic scattering rate in direct detection experiments. To investigate this scenario we examine neutralino dark matter in the MSSM. However our conclusions can be generalised to other types of annihilating DM candidates with a low relic density in the freeze-out scenario but which have their relic densities generated by some other mechanism.
description: 10 pages, 5 figures
A Modified "inside-out" algorithm for simulation of multistage multicomponent separation processes using the UNIFAC group-contribution method
Creators: name: Saeger, Roland B. (Roland Bernard), 1961-
Publisher: name: University of Calgary
Year: 1985
Subjects: subject: TP 156 S45 S25 1986
subject: Separation (Technology)
subject: Gases - Separation
subject: Algorithms

description: Bibliography: p. 99-100.
description: A computational procedure using Boston and Sullivan's "insideout" multistage multicomponent separation algorithm is proposed and implemented in this thesis. The multicomponent systems simulated with this computational procedure were polar systems in which the activity coefficients were calculated using the UNIQUAC model with parameters obtained from the UNIFAC group-contribution method. To improve convergence for multicomponent systems of this type, the "inside-out" procedure was modified by incorporating a local two-parameter liquid-phase compositional-dependence model within the component material balance calculations. The proposed algorithm was implemented in a FORTRAN 77 program and executed on the Honeywell DPS 8/70M computer at the University of Calgary. This program was tested for a wide variety of nonideal systems. The separation process units simulated were distillation columns (including azeotropic and extractive cases), absorption columns and reboiled absorption columns. In general, inclusion of the liquid-phase model resulted in improved convergence for systems in which the original Boston-and- Sullivan method failed to converge.
Initial Results from the Nobeyama Molecular Gas Observations of Distant Bright Galaxies
Creators: name: Iono, D.
name: Hatsukade, B.
name: Kohno, K.
name: Kawabe, R.
name: Ikarashi, S.
name: Ichikawa, K.
name: Kodama, T.
name: Motohara, K.
name: Nakajima, T.
name: Nakanishi, K.
name: Ohta, K.
name: Ota, K.
name: Saito, T.
name: Suzuki, K.
name: Tadaki, K.
name: Tamura, Y.
name: Ueda, J.
name: Umehata, H.
name: Yabe, K.
name: Yoshida, T.
name: Yuma, S.
name: Kuno, N.
name: Takano, S.
name: Iwashita, H.
name: Handa, K.
name: Higuchi, A.
name: Hirota, A.
name: Ishikawa, S.
name: Kimura, K.
name: Maekawa, J.
name: Mikoshiba, H.
name: Miyazawa, C.
name: Miyazawa, K.
name: Muraoka, K.
name: Ogawa, H.
name: Onodera, S.
name: Saito, Y.
name: Sakai, T.
name: Takahashi, S.
name: Yun, M. S.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present initial results from the CO survey toward high redshift galaxies using the Nobeyama 45m telescope. Using the new wide bandwidth spectrometer equipped with a two-beam SIS receiver, we have robust new detections of three high redshift (z=1.6-3.4) submillimeter galaxies (SXDF 1100.001, SDP9, and SDP17), one tentative detection (SDSS J160705+533558), and one non-detection (COSMOS-AzTEC1). The galaxies observed during the commissioning phase are sources with known spectroscopic redshifts from previous optical or from wide-band submm spectroscopy. The derived molecular gas mass and line widths from Gaussian fits are ~10^11 Msun and 430-530 km/s, which are consistent with previous CO observations of distant submm galaxies and quasars. The spectrometer that allows a maximum of 32 GHz instantaneous bandwidth will provide new science capabilities at the Nobeyama 45m telescope, allowing us to determine redshifts of bright submm selected galaxies without any prior redshift information.
description: 4 pages, 1 figure, PASJ Letter Accepted
title: Nutzung von e-Learning an den deutschen Universitäts-HNO-Kliniken 2015: Erhebung unter den medizinischen Fachschaften
Creators: name: Freiherr Von Saß, Peter
name: Klenzner, Thomas
name: Chaker, Adam
Publisher: name: German Medical Science GMS Publishing House
Year: 2016
Subjects: subject: 610 Medical sciences; Medicine

description: Einleitung: Hochwertige e-Learning Anwendungen haben das Potential, Lernerfolg und Zufriedenheit der Lernenden nachhaltig zu verbessern. Somit wird e-Learning in weiten Teilen der universitären Lehre mehr und mehr zum regulären Bestandteil der studentischen Ausbildung. Aktuell gibt es nur [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
title: Sambischer nationaler strategischer HNO Plan
Creators: name: Fröschl, Uta
Publisher: name: German Medical Science GMS Publishing House
Year: 2016
Subjects: subject: 610 Medical sciences; Medicine

description: Die Gesundheitssysteme in vielen Entwicklungsländern stehen unter starkem Druck um die Gesundheitsversorgung der Bevölkerung zu verbessern.
    Oft wird wegen Erkrankungen, die zu hoher Mortalität führen, kein Schwerpunkt auf die Versorgung von Hals-Nasen-Ohren-Erkrankungen gelegt.
[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
title: Prospektive Untersuchungen zur ambulanten Inanspruchnahme einer Klinik der Schwerpunktversorgung im ländlichen Bereich
Creators: name: Issing, Peter Rolf
name: Spreng, Martin
name: Atie, Hasan
Publisher: name: German Medical Science GMS Publishing House
Year: 2016
Subjects: subject: 610 Medical sciences; Medicine

description: Einleitung: In Deutschland beruht die medizinische Versorgung auf drei Säulen: die Hausärzte sind für die Primärdiagnostik und –therapie erste Anlaufstelle. Auf deren Veranlassung werden Patienten an niedergelassene Fachärzte überwiesen. Diese Reihenfolge ist auch[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
title: Objective structured clinical examination (OSCE) als Prüfungstool in der studentischen Lehre – Ergebnisse der Anwendung
Creators: name: Laskawi, Rainer
name: Gehrt, Anna
name: Canis, Martin
Publisher: name: German Medical Science GMS Publishing House
Year: 2016
Subjects: subject: 610 Medical sciences; Medicine

description: Zielsetzung: Die universitäre Lehre ist der erste offizielle Kontaktpunkt für Studierende der Medizin, um das Fach HNO-Heilkunde strukturiert kennenzulernen. Um objektive Resultate der Erfolgskontrolle von Lehrinhalten in der HNO-Heilkunde zu erhalten, wurden in jüngerer Zeit praktische[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
Application of ARMA models in multicomponent signal analysis
Creators: name: Salami, Momoh-Jimoh Eyiomika
Publisher: name: University of Calgary
Year: 1985
Subjects: subject: TK 5102.5 S24 1985
subject: Signal processing
subject: Autoregression (Statistics)
subject: Seismology - Data processing

description: Bibliography: p. 246-257.