cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: How positioning inaccuracies influence the spatial upsampling of sparse head-related transfer function sets
Creators: name: Pörschmann, Christoph
name: Arend, Johannes
Publisher: name: TU Ilmenau
Year: 2019
Subjects: subject: 620

description: Determining full-spherical individual sets of head-related transfer functions (HRTFs) based on sparse measurements is a prerequisite for various applications in virtual acoustics. To obtain dense sets from sparse measurements, spatial upsampling of sparse HRTF sets in the spatially continuous spherical harmonics (SH) domain can be performed by an inverse SH transform. However, this involves artifacts caused by spatial aliasing and order truncation. In a previous publication we presented the SUpDEq method (Spatial Upsampling by Directional Equalization), which reduces these artifacts by a directional equalization prior to the SH transform. Generally, apart from the spatial resolution of the HRTF set, measurement inaccuracies, for example caused by displacements of the head during the measurement, can influence the spatial upsampling as well. By this direction-depending temporal and spectral deviations are added to the dataset, which in the process of spatial upsampling can cause artifacts comparable to spatial aliasing errors. To reduce the influence of the distance inaccuracies, we present a method for distance error compensation that performs an appropriate distance-shifting of the measured HRTFs. Determining the required values for the shift benefits from the directional equalization performed by SUpDEq and results in time-aligning the directionally equalized HRTFs. We analyze the influence of the angular and distance displacements on spectrum, on interaural cues and on modeled localization performance. While limited angular inaccuracies only have a low impact, already small random distance displacements cause strong impairments, which can be significantly reduced applying the proposed distance error compensation method.
description: Audio for Virtual, Augmented and Mixed Realities: Proceedings of ICSA 2019 ; 5th International Conference on Spatial Audio ; September 26th to 28th, 2019, Ilmenau, Germany, p. 47
Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 81 Nr. 1 (2003)
Creators: name: Germania : Anzeiger Der Römisch-Germanischen Kommission Des Deutschen Archäologischen Instituts
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2019

description: Titelei
Inhalt
Die bronzene Ringkopfnadel aus Hofsta∂ir, Island...289-295
Petra Kieselbach/Claus-Joachim Kind/Ann M. Miller/Daniel Richter, Siebenlinden 2...297-299
Nils Müller-Scheeßel, Die Hallstattkultur und ihre räumliche Differenzierung...307-312
Bernard Dedet, Tombes et pratiques funéraires protohistoriques des Grands Causses du Gévaudan (Aveyron, Gard, Lozère)...312-316
Patrice Brun/Bruno Chaume (Dir.), Vix et les éphèmères principautés celtiques...318-322
Karl Heinz Lenz, Siedlungen der Römischen Kaiserzeit auf der Aldenhovener Platte...343-347
Lázaro Lagóstena Barrios, La producción de salsas y conservas de pescado en la Hispania romana (II a.C. – VI d.C.)...354-357
Bernd Steidl, Die Wetterau vom 3. bis 5. Jahrhundert n. Chr...358-363
Stefan Franz Pfahl, Die römische und frühalamannische Besiedlung zwischen Donau, Brenz und Nau...369-374
Ultrafast collinear scattering and carrier multiplication in graphene
Creators: name: Brida, D.
name: Tomadin, A.
name: Manzoni, C.
name: Kim, Y. J.
name: Lombardo, A.
name: Milana, S.
name: Nair, R. R.
name: Novoselov, K. S.
name: Ferrari, A. C.
name: Cerullo, G.
name: Polini, M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Graphene is emerging as a viable alternative to conventional optoelectronic, plasmonic, and nanophotonic materials. The interaction of light with carriers creates an out-of-equilibrium distribution, which relaxes on an ultrafast timescale to a hot Fermi-Dirac distribution, that subsequently cools via phonon emission. Here we combine pump-probe spectroscopy, featuring extreme temporal resolution and broad spectral coverage, with a microscopic theory based on the quantum Boltzmann equation, to investigate electron-electron collisions in graphene during the very early stages of relaxation. We identify the fundamental physical mechanisms controlling the ultrafast dynamics in graphene, in particular the significant role of ultrafast collinear scattering, enabling Auger processes, including charge multiplication, key to improving photovoltage generation and photodetectors.
description: 11 pages, 5 figures
title: Listening Tests with Individual versus Generic Head-Related Transfer Functions in Six-Degrees-of-Freedom Virtual Reality
Creators: name: Rummukainen, Olli
name: Robotham, Thomas
name: Plinge, Axel
name: Wefers, Frank
name: Herre, Jürgen
name: Habets, Emanuël
Publisher: name: TU Ilmenau
Year: 2019
Subjects: subject: 620

description: Individual head-related transfer functions (HRTFs) improve localization accuracy and externalization in binaural audio reproduction compared to generic HRTFs. Listening tests are often conducted using generic HRTFs due to the difficulty of obtaining individual HRTFs for all participants. This study explores the ramifications of the choice of HRTFs for critical listening in a six-degrees-of-freedom audio-visual virtual environment, when participants are presented with an overall audio quality evaluation task. The study consists of two sessions using either individual or generic HRTFs. A small effect between the sessions is observed in a condition where elevation cues are impaired. Other conditions are rated similarly between individual and generic HRTFs.
description: Audio for Virtual, Augmented and Mixed Realities: Proceedings of ICSA 2019 ; 5th International Conference on Spatial Audio ; September 26th to 28th, 2019, Ilmenau, Germany, p. 55
Katie Boyle/Colin Renfrew/Marsha Levine (Eds), Ancient interactions: East and West in Eurasia
Creators: name: Kaiser, Elke
Publisher: name: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts
Year: 2019

description: Rezension zu: Katie Boyle/Colin Renfrew/Marsha Levine (Eds), Ancient interactions: East and West
in Eurasia. McDonald Institute Monographs, Cambridge 2002. Distributed by Oxbow
Books, Oxford. ISBN 1-902937-19-8; ISSN 1363-1349. xii, 344 Seiten mit zahlreichen
Abbildungen.
description: Germania : Anzeiger der Römisch-Germanischen Kommission des Deutschen Archäologischen Instituts, Bd. 83 Nr. 2 (2005)
Best Practices Document, Version 3.1
Creators: name: Fry, Jane
name: Cooper, Alexandra
name: Mowers, Susan
name: Carrington, Carys
Publisher: name: Zenodo
Year: 2019
Subjects: DDI

description: Ontario Data Documentation, Extraction Service and Infrastructure () was a jointly funded project between the
 Ontario Council of University Libraries (OCUL) and OntarioBuys. It provides researchers with access to datasets in a
 web-based data extraction system delivered through Scholars Portal (http://www.scholarsportal.info/
 (http://www.scholarsportal.info/)). Primarily,  contains survey microdata. It also includes other data, such as
 aggregate data.
 The goal of this document is to share our mark-up knowledge with other academic institutions. It is also to include the
 best practices for DDI so there will be consistency in marking up the surveys.
A new eddy-viscosity model for large eddy simulation in helical turbulence
Creators: name: Yu, Changping
Publisher: name: arXiv
Year: 2012
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences
subject: 76F65

description: In isotropic helical turbulence, a new single helical model is suggested for large eddy simulation. Based on the Kolmogrov's hypotheses, the helical model is proposed according to the balance of helicity dissipation and the average of helicity flux across the inertial range, and the helical model is a kind of eddy viscosity model. The coefficient of the helical model is constant and can be also determined dynamically. Numerical simulations of forced and decaying isotropic helical turbulence demonstrate that the helical model predicts the energy and helicity evolution well. The statistical character of the helical model is closer to the DNS results.In a priori test, the energy and helicity dissipations of the helical model also show a good results. In general, the helical model has the advantage contrast with the dynamic Smogorinsky and mixed models.
description: 7 pages, 10 figures
Specific shear viscosity in hot rotating systems of paired fermions
Creators: name: Hung, N. Quang
name: Dang, N. Dinh
Publisher: name: arXiv
Year: 2012
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The specific shear viscosity $\barη$ of a classically rotating system of nucleons that interact via a monopole pairing interaction is calculated including the effects of thermal fluctuations and coupling to pair vibrations within the selfconsistent quasiparticle random-phase approximation. It is found that $\barη$ increases with angular momentum $M$ at a given temperature $T$. In medium and heavy systems, $\barη$ decreases with increasing $T$ at $T\geq$ 2 MeV and this feature is not affected much by angular momentum. But in lighter systems (with the mass number $A\leq$ 20), $\barη$ increases with $T$ at a value of $M$ close to the maximal value $M_{max}$, which is defined as the limiting angular momentum for each system. The values of $\barη$ obtained within the schematic model as well as for systems with realistic single-particle energies are always larger than the universal lower-bound conjecture $\hbar/(4πk_B)$ up to $T$=5 MeV.
description: 19 pages, 7 figures, accepted for publication in Phys. Rev. C
The early early type: discovery of a passive galaxy at z=3
Creators: name: Gobat, Raphaël
name: Strazzullo, Veronica
name: Daddi, Emanuele
name: Onodera, Masato
name: Renzini, Alvio
name: Béthermin, Matthieu
name: Dickinson, Mark
name: Carollo, Marcella
name: Cimatti, Andrea
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present the discovery of a massive, quiescent galaxy at z=2.99. We have obtained a HST/WFC3 spectrum of this object and measured its redshift from the detection of a deep 4000A break consistent with an old population and a high metallicity. By stellar population modeling of both its grism spectrum and broad-band photometry, we derive an age of ~0.7 Gyr, implying a formation redshift of z>4, and a mass >10^11 Msun. Although this passive galaxy is the most distant confirmed so far, we find that it is slightly less compact than other z>2 early-types of similar mass, being overall more analogous to those z~1.6 field early-type galaxies. The discovery of this object shows that early-type galaxies are detectable to at least z=3 and suggests that the diversity of structural properties found in z=1.4-2 ellipticals to earlier epochs could have its origin in a variety of formation histories among their progenitors.
description: 6 pages, 4 figures, 1 table. Accepted for publication in The Astrophysical Journal Letters
title: Accreted Globular Clusters in External Galaxies: Why Adaptive Dynamics won’t work
Creators: name: Lilleengen, Sophia
Publisher: name: Heidelberg University Library
Year: 2019

description: Many astrophysical and galaxy-scale cosmological problems require a well-determined gravitational potential. Globular clusters (GCs) surrounding galaxies can be used as dynamical tracers of the luminous and dark matter distribution at large (kpc) scales. This M.Sc. project investigates - by means of the Auriga galaxy simulations and in anticipation of high-resolution IFU data of external galaxies - whether a novel action-based approach could provide a constraint for an axisymmetric approximation of the gravitational potential.
In an axisymmetric potential, actions (radial JR, vertical Jz and angular momentum Lz) are integrals of motion and can be used to characterize and label orbits. In the Milky Way (MW), the assumption that stars in cold streams are on similar orbits was found to be a useful first-order constraint of its gravitational potential. In external galaxies, no individual stars but only GCs can be resolved. One could expect GCs from the same dwarf galaxy (DG) merger event to move at the present time on similar orbits in the host galaxy, analogously to stellar streams in the MW, and should therefore have similar actions in the true (axisymmetric) potential.
We investigate this idea in one galaxy of the cosmological N-body simulation suite Auriga (Grand et al., 2017). As a first step, we present an effective strategy to fit analytic, axisymmetric, time-dependent potential models with slowly varying parameters to the simulation that are good enough to estimate actions. 
Then, we select stellar particles born in dwarf galaxies as proxies for GCs and follow the evolution of their orbital actions during the process of merging with a more massive galaxy. These actions show a significant variation over time. As a result, at z = 0, the stellar particles accreted in the same merger event show a very extended distribution in action space. We find that minimizing this distribution, however, cannot constrain the true potential since actions and their evolution are affected by complex physical processes during mergers.
In local observations, we confirm this result in the stars of Gaia-Enceladus, one of the few DG mergers of our MW that we know of. Their action distribution is smeared out extensively. Based on these results, we propose that modellers need to find and develop more realistic distribution functions for GCs of a single DG merger event in simulations before being able to constrain the gravitational potential of external galaxies using action-based dynamical modelling of GCs.
Extreme-mass-ratio bursts from the Galactic Centre
Creators: name: Berry, Christopher P. L.
name: Gair, Jonathan R.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: An extreme-mass-ratio burst (EMRB) is a gravitational wave signal emitted when a compact object passes through periapsis on a highly eccentric orbit about a much more massive body, in our case a stellar mass object about the 4.31 \times 10^6 M_sol massive black hole (MBH) in the Galactic Centre. We investigate how EMRBs could constrain the parameters of the Galaxy's MBH. EMRBs should be detectable if the periapsis is r_p < 65 r_g for a μ= 10 M_sol orbiting object, where r_g = GM/c^2 is the gravitational radius. The signal-to-noise ratio ρscales like log(ρ) = -2.7 log(r_p/r_g) + log(μ/M_sol) + 4.9. For periapses smaller than ~ 10 r_g, EMRBs can be informative, providing good constraints on both the MBH's mass and spin.
description: Submitted to the Proceedings of the 9th LISA Symposium, Paris
title: Identifying the Ranking of Focal Points in Coordination Games on the Individual Level
Creators: name: Schmidt, Robert J.
Publisher: name: Heidelberg University Library
Year: 2019

description: We propose a method to identify the ranking of focal points (Schelling, 1960) on the individual level. By contrast to conventional coordination, where subjects bet on only one alternative, subjects coordinate by the distribution of points. This allows them to invest in multiple alternatives and to weigh their choices. As a result, subjects not only reveal which alternative appears most focal to them, but the ranking of the available alternatives with regard to the degree of focality. In an experiment on the elicitation of social norms (Krupka and Weber, 2013), we compare the proposed mechanism with conventional coordination. The data confirms the theoretical predictions regarding coordination behavior and demonstrates that the proposed technique is suited to identify the heterogeneity of focal points on the individual level. Moreover, using Monte Carlo simulations, we find that the proposed mechanism identifies focal points on the group level significantly more efficiently than ordinary coordination. Finally, we point to the possibility to use the mechanism as a simple and direct tool to measure the degree of strategic uncertainty on the individual level.
Inhalt
Creators: name: Redaktion, Die
Publisher: name: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege
Year: 2019

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 48 Nr. 1 (2019)
Supplementary data for BDV-syndrome: an emerging syndrome with profound obesity and neurodevelopmental delay resembling Prader-Willi syndrome
Creators: name: Bosch, Elisabeth
name: Hebebrand, Moritz
name: Popp, Bernt
name: Penger, Theresa
name: Behring, Bettina
name: Cox, Helen
name: Towner, Shelley
name: Kraus, Cornelia
name: Wilson, William G.
name: Khan, Shagufta
name: Krumbiegel, Mandy
name: Ekici, Arif B.
name: Uebe, Steffen
name: Trollmann, Regina
name: Woelfle, Joachim
name: Reis, André
name: Vasileiou, Georgia
Publisher: name: Zenodo
Year: 2021
Subjects: BDV syndrome
carboxypeptidase E
CPE
obesity
neurodevelopmental disorder
hypogonadotropic hypogonadism

description: Bosch_Supplemental_Legends.docx: Legends for supplementary data files relating to https://doi.org/10.1210/clinem/dgab592. Bosch_supp_table_1.xlsx: Detailed description of clinical, molecular findings in eight thus far reported individuals with BDV syndrome. Bosch_supp_table_2.docx: Laboratory values of individuals described in https://doi.org/10.1210/clinem/dgab592. Bosch_supp_table_3.xlsx: Summary of CPE variants and underlying data for Fig 2 in https://doi.org/10.1210/clinem/dgab592.
title: Enhanced Immersion for Binaural Audio Reproduction of Ambisonics in Six-Degrees-of-Freedom: The Effect of Added Distance Information
Creators: name: Plinge, Axel
name: Schlecht, Sebastian
name: Rummukainen, Olli
name: Habets, Emanuël
Publisher: name: TU Ilmenau
Year: 2019
Subjects: subject: 620

description: The immersion of the user is of key interest in the reproduction of acoustic scenes in virtual reality. It is enhanced when movement is possible in six degrees-of-freedom, i.e., three rotational plus three translational degrees. Further enhancement of immersion can be achieved when the user is not only able to move between distant sound sources, but can also move towards and behind close sources. In this paper, we employ a reproduction method for Ambisonics recordings from a single position that uses meta information on the distance of the sound sources in the recorded acoustic scene. A subjective study investigates the benefit of said distance information. Different spatial audio reproduction methods are compared with a multi-stimulus test. Two synthetic scenes are contrasted, one with close sources the user can walk around, and one with far away sources that can not be reached. We found that for close or distant sources, loudness changing with the distance enhances the experience. In case of close sources, the use of correct distance information was found to be important.
description: Audio for Virtual, Augmented and Mixed Realities: Proceedings of ICSA 2019 ; 5th International Conference on Spatial Audio ; September 26th to 28th, 2019, Ilmenau, Germany, p. 63
Measurement of the Bottom-Strange Meson Mixing Phase in the Full CDF Data Set
Creators: name: CDF Collaboration
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We report a measurement of the bottom-strange meson mixing phase β_s using the time evolution of B0_s -> J/ψ(->μ+μ-) ϕ(-> K+ K-) decays in which the quark-flavor content of the bottom-strange meson is identified at production. This measurement uses the full data set of proton-antiproton collisions at sqrt(s)= 1.96 TeV collected by the Collider Detector experiment at the Fermilab Tevatron, corresponding to 9.6 fb-1 of integrated luminosity. We report confidence regions in the two-dimensional space of β_s and the B0_s decay-width difference ΔΓ_s, and measure β_s in [-π/2, -1.51] U [-0.06, 0.30] U [1.26, π/2] at the 68% confidence level, in agreement with the standard model expectation. Assuming the standard model value of β_s, we also determine ΔΓ_s = 0.068 +- 0.026 (stat) +- 0.009 (syst) ps-1 and the mean B0_s lifetime, τ_s = 1.528 +- 0.019 (stat) +- 0.009 (syst) ps, which are consistent and competitive with determinations by other experiments.
description: 8 pages, 2 figures, Phys. Rev. Lett 109, 171802 (2012)
title: Towards the Perception of Sound Source Directivity Inside Six-Degrees-of-Freedom Virtual Reality
Creators: name: Robotham, Thomas
name: Rummukainen, Olli
name: Habets, Emanuël
Publisher: name: TU Ilmenau
Year: 2019
Subjects: subject: 620

description: Sound source directivity is a measure of the distribution of sound, propagating from a source object. It is an essential component of how we perceive acoustic environments, interactions and events. For six-degrees-of-freedom (6-DoF) virtual reality (VR), the combination of binaural audio and complete freedom of movement introduces new influencing elements into how we perceive source directivity. This preliminary study aims to explore if factors attributed to 6- DoF VR have an impact on the way we perceive changes of simple sound source directivity. The study is divided into two parts. Part I comprises of a control experiment in a non-VR monaural listening environment. The task is to ascertain difference limen between reference and test signals using a method of adjustment test. Based on the findings in Part I, Part II implements maximum attenuation thresholds on the same sound source directivity patterns using the same stimuli in 6-DoF VR. Results indicate that for critical steady-state signals, factors introduced by 6-DoF VR potentially mask our ability to detect loudness differences. Further analysis of the behavioral data acquired during Part II provides more insight into how subjects assess sound source directivity in 6-DoF VR.
description: Audio for Virtual, Augmented and Mixed Realities: Proceedings of ICSA 2019 ; 5th International Conference on Spatial Audio ; September 26th to 28th, 2019, Ilmenau, Germany, p. 71
title: Deep Neural Network Approaches for Selective Hearing based on Spatial Data Simulation
Creators: name: Hestermann, Simon
name: Lukashevich, Hanna
name: Sladeczek, Christoph
Publisher: name: TU Ilmenau
Year: 2019
Subjects: subject: 620

description: Selective Hearing (SH) refers to the listener’s attention to specific sound sources of interest in their auditory scene. Achieving SH through computational means involves detection, classification, separation, localization and enhancement of sound sources. Deep neural networks (DNNs) have been shown to perform these tasks in a robust and time-efficient manner. A promising application of SH are intelligent noise-cancelling headphones, where sound sources of interest, such as warning signals, sirens or speech, are extracted from a given auditory scene and conveyed to the user, whilst the rest of the auditory scene remains inaudible. For this purpose, existing noise cancellation approaches need to be combined with machine learning techniques. In this context, we evaluate a convolutional neural network (CNN) architecture and a long short-term memory (LSTM) architecture for the detection and separation of sirens. In addition, we propose a data simulation approach for generating different sound environments for a virtual pair of headphone microphones. The Fraunhofer SpatialSound Wave technology is used for a realistic evaluation of the trained models. For the evaluation, a three-dimensional acoustic scene is simulated via the object-based audio approach.
description: Audio for Virtual, Augmented and Mixed Realities: Proceedings of ICSA 2019 ; 5th International Conference on Spatial Audio ; September 26th to 28th, 2019, Ilmenau, Germany, p. 79
Pläne mit Wert
Creators: name: Hahn, Martin
Publisher: name: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege
Year: 2019

description: Denkmalpflege in Baden-Württemberg – Nachrichtenblatt der Landesdenkmalpflege, Bd. 48 Nr. 1 (2019)
Der gemischtsbelegte Friedhof bei Liebenau, Kr. Nienburg (Weser)
Creators: name: Genrich, Albert
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: -
description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 38 (1969): Nachrichten aus Niedersachsens Urgeschichte
First measurement of the top quark pair production cross section at $\sqrt{s} = 13.6 \, \mathrm{TeV}$ at the CMS experiment
Creators: name: Jeppe, Laurids
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2023
Subjects: p p: scattering
p p: colliding beams
top: pair production
CMS
CERN LHC Coll
final state: ((n)jet dilepton)
final state: ((n)jet lepton)
channel cross section: measured
experimental results
13600 GeV-cms

description: 15th International Workshop on Top Quark Physics, TOP2022, Durham, UK, 4 Sep 2022 - 9 Sep 2022; 4 pp. (2023).
description: We present the first measurement of the top quark pair production cross section at the new LHC center-of-mass energy of $\sqrt{s} = 13.6 \, \mathrm{TeV}$, using $1.20 \, \mathrm{fb}^{-1}$ of data recorded at the CMS detector. We use a new method combining dilepton and lepton+jets decay channels, constraining several experimental uncertainties in situ. A cross section of $887^{+43}_{-41}(\mathrm{stat+syst}) \pm 53 (\mathrm{lumi}) \, \mathrm{pb}$ is measured, in agreement with the standard model. This result constitutes a first validation of the new data taken by CMS in LHC Run 3.
title: Η δυναμική του περιβάλλοντος λειτουργίας του σχολείου και ο ρόλος του διευθυντή στη διαχείριση, ανάδειξη και προαγωγή του ανθρώπινου δυναμικού. Μελέτη περίπτωσης σχολικού συγκροτήματος Νέας Σμύρνης
title: The dynamic of the school environment and the role of the headmaster in managing, bringing forward and promoting human resources. Case study of a Nea Smyrni school complex
titleType: AlternativeTitle
Creators: name: Γάτσιου, Ιωάννα
name: Καρασκούτη, Κυριακή
Publisher: name: Πανεπιστήμιο Δυτικής Αττικής
Year: 2021
Subjects: Σχολική κουλτούρα
Ανθρώπινοι πόροι
Διευθυντές σχολικών μονάδων
Ηγέτης
Διοίκηση ανθρωπίνων πόρων
Οργανωσιακή συμπεριφορά
Οργανωσιακή κουλτούρα
Ηγεσία
Σχολικό συγκρότημα

description: Το σχολείο λειτουργεί ως ανοιχτό σύστημα που βρίσκεται σε αλληλεξάρτηση και αλληλεπίδραση με το εσωτερικό και εξωτερικό περιβάλλον. Κατά τη διαδικασία αυτή ο διευθυντής της σχολικής μονάδας καλείται να ανακαλύψει έναν κοινό τόπο οράματος και στόχων του σχολείου με τους συντελεστές επίτευξης( εκπαιδευτικούς, μαθητές, γονείς, τοπική κοινωνία, σύλλογοι, σχολικές επιτροπές).Σημαντική είναι όμως και η διαχείριση ,ανάδειξη, προαγωγή του ανθρώπινου δυναμικού και ο εκπαιδευτικός σχεδιασμός. Όλα όσα προαναφέρθηκαν αποτελούν σημαντικό άξονα ανάδειξης της αποτελεσματικότητας και της ποιότητας της σχολικής μονάδας. Η αποτελεσματική διαχείριση του ανθρώπινου δυναμικού είναι μια από τις σημαντικότερες προκλήσεις που αντιμετωπίζει ο διευθυντής για την απόκτηση και διατήρηση του ανταγωνιστικού πλεονεκτήματος του σχολείου του. Η διοίκηση στην εκπαίδευση, παρέχει στους εκπαιδευτικούς-διοικητικούς ηγέτες τις δυνατότητες για ν΄ αφήσουν το στίγμα τους, προκειμένου να επιτύχουν , τόσο τους στόχους της εκάστοτε σχολικής μονάδας, όσο και να βελτιώνουν την απόδοση των ίδιων και των συναδέλφων τους.
title: Exploring Audiovisual Support Systems for In-Car Multiparty Conferencing
Creators: name: Weidner, Florian
name: Fiedler, Bernhard
name: Redlich, Johannes
name: Broll, Wolfgang
Publisher: name: TU Ilmenau
Year: 2019
Subjects: subject: 620

description: Calling while driving poses a severe safety risk. When more than two people are involved in a call - a conference call - this risk increases even more. Intelligent vehicles could offer support systems that ease the cognitive burden of such a multiparty calls. We explore the possibilities of such advanced driving assistant systems (ADAS) in two ways: first, we investigate object-based spatial audio where each remote caller is modeled as a distinct audio source. Second, we apply a non-intrusive ambient stereoscopic 3D (S3D) visualization that indicates the current speaker and its location. In a between-subject design driving simulator study (n=56), we assess workload, user experience and driving performance. Surprisingly, we found no positive effect of object-based audio. However, we present evidence how a supporting visualization might lower situational stress and increase the system’s dependability. We conclude that a supportive and intelligent stereoscopic visualization is a promising candidate for enhancing multiparty conference calls while driving.
description: Audio for Virtual, Augmented and Mixed Realities: Proceedings of ICSA 2019 ; 5th International Conference on Spatial Audio ; September 26th to 28th, 2019, Ilmenau, Germany, p. 85
title: New potential for portable spatial audio with MEMS based speakers
Creators: name: Beer, Daniel
name: Brocks, Tobias
name: Küller, Jan
name: Strehle, Steffen
name: Koch, Tilman
Publisher: name: TU Ilmenau
Year: 2019
Subjects: subject: 620

description: There is a high demand for portable audio on the market. Hence, manufactures of headphones and hearing aids have to deal with miniaturization of electroacoustic transducers (micro speakers) but maintain sound quality and energy efficiency (battery life time) at the same time. Different techniques are known for downsizing transducers. A very successful method is provided by the semiconductor industry. The use of the so-called MEMS technology (Micro- Electro-Mechanical-System) has already led to great success in microelectronics and MEMS applications such as microphones and accelerometers. This success has triggered a high interest in implementing MEMS technology also for speaker manufacturing. Based on patents, the initial approaches of MEMS loudspeakers will be presented. An outlook of the arising new potentials for portable spatial audio with MEMS based speakers will be given.
description: Audio for Virtual, Augmented and Mixed Realities: Proceedings of ICSA 2019 ; 5th International Conference on Spatial Audio ; September 26th to 28th, 2019, Ilmenau, Germany, p. 93
Finite-size effect of antiferromagnetic transition and electronic structure in LiFePO4
Creators: name: Shu, G. J.
name: Wu, M. W.
name: Chou, F. C.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The finite-size effect on the antiferromagnetic (AF) transition and electronic configuration of iron has been observed in LiFePO4. Determination of the scaling behavior of the AF transition temperature (TN) versus the particle-size dimension (L) in the critical regime 1-TN(L)/TN(XTL)\simL^-1 reveals that the activation nature of the AF ordering strongly depends on the surface energy. In addition, the effective magnetic moment that reflects the electronic configuration of iron in LiFePO4 is found to be sensitive to the particle size. An alternative structural view based on the polyatomic ion groups of (PO4)3- is proposed.
description: To be published in Phys. Rev. B - Rapid Communication
Eine jungbronzezeitliche „Lanzette" von Barchel, Kr. Bremervörde
Creators: name: Deichmüller, Jürgen
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: -
description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 38 (1969): Nachrichten aus Niedersachsens Urgeschichte
title: Switched Spatial Impulse Response Convolution as an Ambisonic Distance-Panning Function
Creators: name: Cairns, Patrick
name: Moore, David
Publisher: name: TU Ilmenau
Year: 2019
Subjects: subject: 620

description: Ambisonics offers a robust and effective approach to the recording, processing and delivery of Spatial Audio. The Ambisonic system is often considered to provide a perceptually and computationally advantageous Spatial Audio experience in comparison to typical Binaural systems. This is true even when an end-step Binaural render is required, as is typical in Virtual or Augmented Reality systems which naturally imply audio delivery via headphones. Standard Ambisonic processing allows for the rotation of a sound field around an origin position. There is not, however, a strongly established means of modulating the radial distance of a virtual sound source from the origin. This paper presents a potential solution to an Ambisonic distance-panning function for both static and dynamic virtual sources in the form of a FOA (First Order Ambisonics) Switched-SIR (Spatial Impulse Response) Convolution Reverberator. This includes a presentation of the framework for such a function, and an analysis of audio rendered using prototype scripts.
description: Audio for Virtual, Augmented and Mixed Realities: Proceedings of ICSA 2019 ; 5th International Conference on Spatial Audio ; September 26th to 28th, 2019, Ilmenau, Germany, p. 99
Strangeness Balance in HADES Experiments and the Xi- Enhancement
Creators: name: Kolomeitsev, E. E.
name: Tomasik, B.
name: Voskresensky, D. N.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: HADES data on a strangeness production in Ar+KCl collisions at 1.76A GeV are analyzed within a minimal statistical model. The total negative strangeness content is fixed by the observed K^+ multiplicities on event-by-event basis. Particles with negative strangeness are assumed to remain in chemical equilibrium with themselves and in thermal equilibrium with the environment until a common freeze-out. Exact strangeness conservation in each collision event is explicitly preserved. This implies that Xi baryons can be released only in events where two or more kaons are produced. An increase of the fireball volume due to application of a centrality trigger in HADES experiments is taken into account. We find that experimental ratios of K-/K+, Lambda/K+ and Sigma/K+ can be satisfactorily described provided in-medium potentials are taken into account. However, the calculated Xi-/Lambda/K+ ratio proves to be significantly smaller compared to the measured value (8 times lower than the experimental median value and 3 times lower than the lower error bar). Various scenarios to explain observed Xi enhancement are discussed. Arguments are given in favor of the Xi production in direct reactions. The rates of the possible production processes are estimated and compared.
description: 13 pages, 3 figures
title: The Virtual Acoustic Spaces Unity Spatializer with custom head tracker
Creators: name: Resch, Thomas
name: Hädrich, Markus
Publisher: name: TU Ilmenau
Year: 2019
Subjects: subject: 620

description: The virtual acoustic spaces (VAS) unity spatializer is a plugin for dynamic binaural synthesis for Unity. It can handle impulse responses (IRs) of arbitrary length (limited only by hardware resources). Hence, it is possible to calculate the binaural synthesis not only with head related transfer functions (HRTFs), but also on the basis of binaural room impulse responses (BRIRs). The plugin can also virtualize reflections calculated by raytracing and it is possible to load an individual IR set for each instance. In addition to being compatible with off-the-shelf cross reality (XR) hardware it features a Bluetooth binding for an easily built, custom-made head tracker based on an ESP32 board. It is therefore predestined for audio augmented reality applications.
description: Audio for Virtual, Augmented and Mixed Realities: Proceedings of ICSA 2019 ; 5th International Conference on Spatial Audio ; September 26th to 28th, 2019, Ilmenau, Germany, p. 107
title: Room geometry inference using sources and receivers on a uniform linear array
Creators: name: El Baba, Youssef
name: Walther, Andreas
name: Habets, Emanuël
Publisher: name: TU Ilmenau
Year: 2019
Subjects: subject: 620

description: State-of-the-art room geometry inference algorithms estimate the shape of a room by analyzing peaks in room impulse responses. These algorithms typically require the position of the source wrt the receiver array; this position is often estimated with sound source localization, which is susceptible to high errors under common sampling frequencies. This paper proposes a new approach, namely using an array with a known geometry and consisting of both sources and receivers. When these transducers constitute a uniform linear array, new challenges and opportunities arise for performing room geometry inference. We propose solutions designed to address these challenges, but also designed to leverage the opportunities for better results.
description: Audio for Virtual, Augmented and Mixed Realities: Proceedings of ICSA 2019 ; 5th International Conference on Spatial Audio ; September 26th to 28th, 2019, Ilmenau, Germany, p. 115
A Unified Microscopic-Macroscopic Monte Carlo Simulation of Gas-Grain Chemistry in Cold Dense Interstellar Clouds
Creators: name: Chang, Qiang
name: Herbst, Eric
Publisher: name: arXiv
Year: 2012
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: For the first time, we report a unified microscopic-macroscopic Monte Carlo simulation of gas-grain chemistry in cold interstellar clouds in which both the gas-phase and the grain surface chemistry are simulated by a stochastic technique. The surface chemistry is simulated with a microscopic Monte Carlo method in which the chemistry occurs on an initially flat surface. The surface chemical network consists of 29 reactions initiated by the accreting species H, O, C, and CO. Four different models are run with diverse but homogeneous physical conditions including temperature, gas density, and diffusion-barrier-to-desorption energy ratio. As time increases, icy interstellar mantles begin to grow. Our approach allows us to determine the morphology of the ice, layer by layer, as a function of time, and to ascertain the environment or environments for individual molecules. Our calculated abundances can be compared with observations of ices and gas-phase species, as well as the results of other models.
description: ApJ accepted. 37 pages, 9 figures
Coping responses in anxious and depressed youth: the mediating role of rumination and cognitive reappraisal in CBT treatment effects
Creators: name: Rosenblatt, Atara
Publisher: name: No Publisher Supplied
Year: 2022

description: Ineffective coping responses are strongly related to the development of anxiety and depression in youth (Betis, et al 2016). A more nuanced understanding of the differences in cognitive coping between anxious and depressed youth is important in order to improve efficacy of existing treatments and improve future treatment development. The literature points to a specific link between rumination and depression in youth, and a specific link between the use of cognitive reappraisal and anxious youth. This study aims to confirm these differences in cognitive coping styles. Furthermore, a small amount of research thus far has established treatment mediators and mechanisms of change in CBT for anxious and depressed youth (Prins and Ollendick, 2003). However, several studies have found cognitive change to mediate CBT treatment success in anxious and depressed youth. This study will look to 1) Confirm differences in cognitive coping between anxious and depressed youth; specifically, the unique relationship between rumination and depression and cognitive reappraisal and anxiety 2) Establish rumination as a mediator of CBT treatment success in depressed youth and changes in cognitive reappraisal as a mediator of CBT treatment success in anxious youth. Participants include 239 youth between the ages of 6-17 who received cognitive behavioral therapy to treat a primary DSM-IV diagnosis of Depression or Anxiety. A series of Analyses of Covariance (ANCOVA) was conducted to assess between group differences (anxiety/depression) in rumination and cognitive reappraisal while covarying for sex and age of youth at pre-treatment. Additionally, a series of moderated mediation analyses were used to assess for the roles of rumination and cognitive reappraisal in the respective change processes. Differences in rumination and cognitive reappraisal between anxious and depressed youth, were mostly non-significant. Rumination was found to significantly mediate treatment results in anxious and depressed youth. This mediation was not significantly moderated by a diagnosis of anxiety versus depression. Implications for future research are discussed, including continuing to look at various forms of cognitive coping as potential treatment mediators. Continuing to establish such treatment mediators can help maximize treatment focus and efficacy.
title: Detection of Constant Phase Shifts in Filters for Sound Field Synthesis
Creators: name: Schultz, Frank
name: Hahn, Nara
name: Spors, Sascha
Publisher: name: TU Ilmenau
Year: 2019
Subjects: subject: 620

description: Filters with constant phase shift in conjunction with 3/6 dB amplitude decay per octave frequently occur in sound field synthesis and sound reinforcement applications. These ideal filters, known as (half) differentiators, exhibit zero group delay and 45/90 degree phase shift. It is well known that certain group delay distortions in electro-acoustic systems are audible for trained listeners and critical audio stimuli, such as transient, impulse-like and square wave signals. It is of interest if linear distortion by a constant phase shift is audible as well. For that, we conducted a series of ABX listening tests, diotically presenting non-phase shifted references against their treatments with different phase shifts. The experiments revealed that for the critical square waves, this can be clearly detected, which generally depends on the amount of constant phase. Here, -90 degree (Hilbert transform) is comparably easier to detect than other phase shifts. For castanets, lowpass filtered pink-noise and percussion the detection rate tends to guessing for most listeners, although trained listeners were able to discriminate treatments in the first two cases based on changed pitch, attack and roughness cues. Our results motivate to apply constant phase shift filters to ensure that also the most critical signals are technically reproduced as best as possible. In the paper, we furthermore give analytical expressions for discrete-time infinite impulse response of an arbitrary constant phase shifter and for practical filter design.
description: Audio for Virtual, Augmented and Mixed Realities: Proceedings of ICSA 2019 ; 5th International Conference on Spatial Audio ; September 26th to 28th, 2019, Ilmenau, Germany, p. 123
Frühe Menschheit und Umwelt. Festschrift für Alfred Rust. Teil II. Naturwissenschaftliche Beiträge
Creators: name: Raddatz, Klaus
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: Rezension zu: Frühe Menschheit und Umwelt. Festschrift für Alfred Rust. Teil II. Naturwissenschaftliche Beiträge. Hrsg, von Karl Gripp, Rudolf Schütrumpf und Hermann Schwabedissen. Köln, Graz (Böhlau) 1967. (Fundamenta. B. 2.) 329 S., 61 Taf., 28 Tabellen und 42 Abb. im Text
description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 38 (1969): Nachrichten aus Niedersachsens Urgeschichte
A computational method for the Helmholtz equation in unbounded domains based on the minimization of an integral functional
Creators: name: Ciraolo, Giulio
name: Gargano, Francesco
name: Sciacca, Vincenzo
Publisher: name: arXiv
Year: 2012
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We study a new approach to the problem of transparent boundary conditions for the Helmholtz equation in unbounded domains. Our approach is based on the minimization of an integral functional arising from a volume integral formulation of the radiation condition. The index of refraction does not need to be constant at infinity and may have some angular dependency as well as perturbations. We prove analytical results on the convergence of the approximate solution. Numerical examples for different shapes of the artificial boundary and for non-constant indexes of refraction will be presented.
title: Prediction of User Temporal Interactions with Online Course Platforms Using Deep Learning Algorithms (accepted)
Creators: name: Ren, Junru
name: Wu, Shaomin
Publisher: name: Elsevier
Year: 2023

description: The analysis of learning interactions during online studying is a necessary task for designing online courses and sequencing key interactions, which enables online learning platforms to provide users with more efficient and personalized service. However, the research on predicting the interaction itself is not sufficient and the temporal information of interaction sequences hasn’t been fully investigated. To fill in this gap, based on the interaction data collected from Massive Open Online Courses (MOOCs), this paper aims to simultaneously predict a user’s next interaction and the occurrence time to that interaction. Three different neural network models: the long short-term memory, the recurrent marked temporal point process, and the event recurrent point process, are applied on the MOOC interaction dataset. It concludes that taking the correlation between the user action and its occurrence time into consideration can greatly improve the model performance, and that the prediction results are conducive to exploring dropout rates or online learning habits and performances.
description: Author's Accepted Manuscript
title: Perceptual Evaluation of Spatial Resolution in Directivity Patterns 2: coincident source/listener positions
Creators: name: Frank, Matthias
name: Brandner, Manuel
Publisher: name: TU Ilmenau
Year: 2019
Subjects: subject: 620

description: The incorporation of source directivity is important for a plausible and authentic auralization. While high-resolution measurement setups and data exist, it is yet not clear how detailed the directivity information has to be measured and reproduced with regard to perception. In particular, when source and listener are at the same location, resulting in a high direct-to-reverberant energy ratio, the precise shape of the directivity pattern might not yield perceptual differences. The paper approaches this question by a listening experiment in a virtual environment with generic directivity patterns and coincident position of listener and source. The experiment compares different spatial resolutions (spherical harmonic orders) of the directivity patterns for multiple virtual listener/source positions/orientations and levels of direct sound for speech and noise. The virtual environment employs a higher-order image-source model and binaural, dynamic Ambisonic playback. The results show that the exact shape of the directivity pattern is often perceptually irrelevant, while the preservation of the direct-to-reverberant energy ratio is more important.
description: Audio for Virtual, Augmented and Mixed Realities: Proceedings of ICSA 2019 ; 5th International Conference on Spatial Audio ; September 26th to 28th, 2019, Ilmenau, Germany, p. 131
Bibliographie zur Ur- und Frühgeschichte Niedersachsens 1969
Creators: name: Schirnig, Heinz
name: Claus, Martin
Publisher: name: Nachrichten aus Niedersachsens Urgeschichte
Year: 2019

description: -
description: Nachrichten aus Niedersachsens Urgeschichte, Bd. 39 (1970): Nachrichten aus Niedersachsens Urgeschichte