cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Performance Analysis of Optimized VANET Protocols in Real World Tests
Creators: name: Toutouh, Jamal
name: Alba, Enrique
Publisher: name: arXiv
Year: 2025
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Vehicular ad hoc networks (VANETs) provide the communications required to deploy Intelligent Transportation Systems (ITS). In the current state of the art in this field there is a lack of studies on real outdoor experiments to validate thenew VANETs protocols and applications proposed by designers. In this work we have addressed the definition of a testbed in order to study the performance of the Vehicular Data Transfer Protocol (VDTP) in a real urban VANET. The VDTP protocol has been tested by employing six different parameter settings: one defined by human experts and five automatically optimized by means of metaheuristic algorithms (PSO, DE, GA, ES, and SA). As a result, we have been able to confirm the performance improvements when optimized VDTP configurations are used, validating the results previously obtained through simulation.
description: 2011 7th International Wireless Communications and Mobile Computing Conference
Enhanced acousto-optic properties in layered media
Creators: name: Smith, M. J. A.
name: Wolff, C.
name: Lapine, M.
name: Poulton, C. G.
name: de Sterke, C. Martijn
Publisher: name: arXiv
Year: 2017
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We present a rigorous procedure for evaluating the photoelastic coefficients of a layered medium where the periodicity is smaller than the wavelengths of all optical and acoustic fields. Analytical expressions are given for the coefficients of a composite material comprising thin layers of optically isotropic materials. These coefficients include artificial contributions that are unique to structured media and arise from the optical and mechanical contrast between the constituents. Using numerical examples, we demonstrate that the acousto-optic properties of layered structures can be enhanced beyond those of the constituent materials. Furthermore, we show that the acousto-optic response can be tuned as desired.
description: 9 pages, 4 figures
Evaluation of sequence hybridization for respiratory viruses using the Twist Bioscience Respiratory Virus Research panel and the OneCodex Respiratory Virus sequence analysis workflow.
Creators: name: Kapel, Natalia
name: Kalimeris, Elizabeth
name: Lumley, Sheila
name: Decano, Arun
name: Rodger, Gillian
name: Alves, Marcela Lopes
name: Dingle, Kate
name: Oakley, Sarah
name: Barrett, Lucinda
name: Barnett, Sophie
name: Crook, Derrick
name: Eyre, David W
name: Matthews, Philippa C
name: Street, Teresa
name: Stoesser, Nicole
Publisher: name: The Francis Crick Institute
Year: 2023
Subjects: classificationCode: Infectious Disease
subject: Infectious Disease
classificationCode: Immunology
subject: Immunology
subject: FOS: Clinical medicine
classificationCode: Genetics & Genomics
subject: Genetics & Genomics

description: Respiratory viral infections are a major global clinical problem, and rapid, cheap, scalable and agnostic diagnostic tests that capture genome-level information on viral variation are urgently needed. Metagenomic approaches would be ideal, but remain currently limited in that much of the genetic content in respiratory samples is human, and amplifying and sequencing the viral/pathogen component in an unbiased manner is challenging. PCR-based tests, including those which detect multiple pathogens, are already widely used, but do not capture information on strain-level variation; tests with larger viral repertoires are also expensive on a per-test basis. One intermediate approach is the use of large panels of viral probes or 'baits', which target or 'capture' sequences representing complete genomes amongst several different common viral pathogens; these are then amplified, sequenced and analysed with a sequence analysis workflow. Here we evaluate one such commercial bait capture method (the Twist Bioscience Respiratory Virus Research Panel) and sequence analysis workflow (OneCodex), using control (simulated) and patient samples head-to-head with a validated multiplex PCR clinical diagnostic test (BioFire FilmArray). We highlight the limited sensitivity and specificity of the joint Twist Bioscience/OneCodex approach, which are further reduced by shortening workflow times and increasing sample throughput to reduce per-sample costs. These issues with performance may be driven by aspects of both the laboratory (e.g. capacity to enrich for viruses present in low numbers), bioinformatics methods used (e.g. a limited viral reference database) and thresholds adopted for calling a virus as present or absent. As a result, this workflow would require further optimization prior to any implementation for respiratory virus characterization in a routine diagnostic healthcare setting.
Coherent $π$-pulse emitted by a dense relativistic cold electron beam
Creators: name: Arteaga, J. A.
name: Monteiro, L. F.
name: Serbeto, A.
name: Tsui, K. H.
name: Mendonça, J. T.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Starting from a three-wave interaction system of equations for free-electron lasers in the framework of a quantum fluid model, we show that these equations satisfy the Sine-Gordon equation. The full solution in space and in time of this set of equations are numerically obtained.
description: 9 pages, 7 figures
Deliverable D.1.2.3 Pilot PT on outbreak surveillance based on WGS data
Creators: name: Boel, Jeppe
name: Gyemose, Pernille
name: Hallam, Sally
name: Johnson, Paula
name: Torpdahl, Mia
Publisher: name: Zenodo
Year: 2022
Subjects: CARE
PT
surveillance

description: OHEJP Project: CARE
Prozessstrategien für das selektive Elektronenstrahlschmelzen
Creators: name: Breuning, C.
name: Renner, J.
name: Markl, M.
name: Körner, C.
Publisher: name: Zenodo
Year: 2023
Subjects: SFB 814 Additive Fertigung Abschlusskolloqium

description: Das Ziel dieses Teilprojekts besteht darin, die Entwicklung von Prozessstrategien für das selektive Elektronenstrahlschmelzen zu automatisieren. Hierfür soll die innovative elektronenoptische Bildgebung in den Prozessablauf integriert werden. Durch eine in situ Qualitätskontrolle, kombiniert mit den Erkenntnissen aus den ersten beiden Förderperioden, soll der Prozessablauf reguliert werden. Am Ende des Projekts soll ein selbstlernendes System entstehen, das auch für neue Legierungen eine zuverlässige Herstellung beliebiger Bauteile ermöglicht. Dies wird durch eine Prozessdatenbankoptimierung erreicht.
The shadow knows: using shadows to investigate the structure of the pretransitional disk of HD 100453
Creators: name: Long, Zachary C.
name: Fernandes, Rachel B.
name: Sitko, Michael
name: Wagner, Kevin
name: Muto, Takayuki
name: Hashimoto, Jun
name: Follette, Katherine
name: Grady, Carol A.
name: Fukagawa, Misato
name: Hasegawa, Yasuhiro
name: Kluska, Jacques
name: Kraus, Stefan
name: Mayama, Satoshi
name: McElwain, Michael W.
name: Oh, Daehyeon
name: Tamura, Motohide
name: Uyama, Taichi
name: Wisniewski, John P.
name: Yang, Yi
Publisher: name: arXiv
Year: 2017
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We present GPI polarized intensity imagery of HD 100453 in Y-, J-, and K1 bands which reveals an inner gap ($9 - 18$ au), an outer disk ($18-39$ au) with two prominent spiral arms, and two azimuthally-localized dark features also present in SPHERE total intensity images (Wagner 2015). SED fitting further suggests the radial gap extends to $1$ au. The narrow, wedge-like shape of the dark features appears similar to predictions of shadows cast by a inner disk which is misaligned with respect to the outer disk. Using the Monte Carlo radiative transfer code HOCHUNCK3D (Whitney 2013), we construct a model of the disk which allows us to determine its physical properties in more detail. From the angular separation of the features we measure the difference in inclination between the disks 45$^{\circ}$, and their major axes, PA = 140$^{\circ}$ east of north for the outer disk and 100$^{\circ}$for the inner disk. We find an outer disk inclination of $25 \pm 10^{\circ}$ from face-on in broad agreement with the Wagner 2015 measurement of 34$^{\circ}$. SPHERE data in J- and H-bands indicate a reddish disk which points to HD 100453 evolving into a young debris disk.
Neue Prozessstrategien für das Laserstrahlschmelzen von Kunststoffen
Creators: name: Greiner, Sandra
name: Schlicht, Samuel
name: Drummer, Dietmar
Publisher: name: Zenodo
Year: 2023
Subjects: SFB 814 Additive Fertigung Abschlusskolloqium

description: Im Teilprojekt B3 werden die grundlegenden Auswirkungen der Prozessführung beim Laserstrahlschmelzen von Kunststoffen auf die resultierenden Bauteileigenschaften analysiert. Dabei werden die komplexen Wechselwirkungen der Teilprozesse Pulverauftrag, Belichtung und Konsolidierung sowie die zugrundeliegende Temperaturführung wissenschaftlich untersucht. Das Ziel ist es, mithilfe neuer Prozessstrategien die Herstellung von Bauteilen mit reproduzierbaren und definierten Eigenschaften zu ermöglichen.
HI, CO, and Dust in the Perseus Cloud
Creators: name: Okamoto, Ryuji
name: Yamamoto, Hiroaki
name: Tachihara, Kengo
name: Hayakawa, Takahiro
name: Hayashi, Katsuhiro
name: Fukui, Yasuo
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Comparison analyses between the gas emission data (HI 21cm line and CO 2.6 mm line) and the Planck/IRAS dust emission data (optical depth at 353 GHz tau353 and dust temperature Td) allow us to estimate the amount and distribution of the hydrogen gas more accurately, and our previous studies revealed the existence of a large amount of optically-thick HI gas in the solar neighborhood. Referring to this, we discuss the neutral hydrogen gas around the Perseus cloud in the present paper. By using the J-band extinction data, we found that tau353 increases as a function of the 1.3-th power of column number density of the total hydrogen (NH), and this implies dust evolution in high density regions. This calibrated tau353-NH relationship shows that the amount of the HI gas can be underestimated to be ~60% if the optically-thin HI method is used. Based on this relationship, we calculated optical depth of the 21 cm line (tauHI), and found that ~ 0.92 around the molecular cloud. The effect of tauHI is still significant even if we take into account the dust evolution. We also estimated a spatial distribution of the CO-to-H2 conversion factor (XCO), and we found its average value is ~ 1.0x10^20 cm-2 K-1 km-1 s. Although these results are inconsistent with some previous studies, these discrepancies can be well explained by the difference of the data and analyses methods.
Additive und umformtechnische Fertigung hybrider Bauteile mit lokal angepassten Eigenschaften
Creators: name: Hafenecker, Jan
name: Rothfelder, Richard
name: Merklein, Marion
name: Schmidt, Michael
Publisher: name: Zenodo
Year: 2023
Subjects: SFB 814 Additive Fertigung Abschlusskolloqium

description: Das Teilprojekt B5 hat zum Ziel, die Kombination aus additiver Fertigung und Umformtechnik zur Herstellung von maßgeschneiderten, funktionalisierten und individualisierten Titan-Hybridbauteilen eingehend zu erforschen. Neben dem Blechgrundkörper werden die additiv gefertigten Elemente der Hybridbauteile umgeformt, um den Werkstoff gezielt zu verfestigen und lokale Unterschiede in den Eigenschaften einzustellen. Zusätzlich wird angestrebt, eine lokale Werkstoffmodifikation in den additiv gefertigten Elementen zu erreichen. Dies wird durch den ortsselektiven Eintrag von Zusatzstoffen in Kombination mit in situ Legierungsbildung während des Laserstrahlschmelzprozesses (LSS-M) ermöglicht. Diese Modifikation soll sowohl den Anforderungen der Umformung als auch den Anforderungen des Einsatzes der Bauteile gerecht werden und individuell angepasst werden können.
FedGES: A Federated Learning Approach for BN Structure Learning
Creators: name: Torrijos, Pablo
name: Gámez, José A.
name: Puerta, José M.
Publisher: name: arXiv
Year: 2025
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Bayesian Network (BN) structure learning traditionally centralizes data, raising privacy concerns when data is distributed across multiple entities. This research introduces Federated GES (FedGES), a novel Federated Learning approach tailored for BN structure learning in decentralized settings using the Greedy Equivalence Search (GES) algorithm. FedGES uniquely addresses privacy and security challenges by exchanging only evolving network structures, not parameters or data. It realizes collaborative model development, using structural fusion to combine the limited models generated by each client in successive iterations. A controlled structural fusion is also proposed to enhance client consensus when adding any edge. Experimental results on various BNs from {\sf bnlearn}'s BN Repository validate the effectiveness of FedGES, particularly in high-dimensional (a large number of variables) and sparse data scenarios, offering a practical and privacy-preserving solution for real-world BN structure learning.
Forschungsdatenmanagement entlang des Datenlebenszyklus
Creators: name: Buch, Susanne
name: Eilert, Eva
name: Fliegner, Angelika
Publisher: name: Zenodo
Year: 2022
Subjects: Forschungsdatenmanagement
Datenlebenszyklus

description: Forschungsdatenmanagement (FDM) nimmt im Forschungsalltag der Hochschulen für angewandte Wissenschaften (HAW) eine zunehmende größere Rolle ein und stellt an viele Forschende bisher unbekannte Anforderungen. So gilt es ein FAIRes und nachhaltiges Datenmanagement im Sinne des Kodex „Leitlinien zur Sicherung guter wissenschaftlicher Praxis“ der DFG zu betreiben – für sich selbst, für die eigene Forschungsgruppe und für die Forschungsgemeinschaft. In dieser Veranstaltung anlässlich des Tags der Forschungsdaten in NRW am 15.11.2022 wurden die wesentlichen Grundzüge des Forschungsdatenmanagements anhand des Forschungsdatenlebenszyklus nähergebracht und Praxisbeispiele und nützliche Links vorgestellt. Die Originalpräsentation ist über Conceptboard einsehbar: https://app.conceptboard.com/board/pd16-f504-imy3-hrz6-gtxu
Control methods for improved Fisher information with quantum sensing
Creators: name: Gefen, Tuvia
name: Jelezko, Fedor
name: Retzker, Alex
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Recently new approaches for sensing the frequency of time dependent Hamiltonians have been presented, and it was shown that the optimal Fisher information scales as $T^{4}.$ We present here our interpretation of this new scaling, where the relative phase is accumulated quadratically with time, and show that this can be produced by a variety of simple pulse sequences. Interestingly, this scaling has a limited duration, and we show that certain pulse sequences prolong the effect. The performance of these schemes is analyzed and we examine their relevance to state-of-the-art experiments. We analyze the $T^{3}$ scaling of the Fisher information which appears when multiple synchronized measurements are performed, and is the optimal scaling in the case of a finite coherence time.
Assessing distances and consistency of kinematics in Gaia/TGAS
Creators: name: Schönrich, Ralph
name: Aumer, Michael
Publisher: name: arXiv
Year: 2017
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We apply the statistical methods by Schoenrich, Binney & Asplund to assess the quality of distances and kinematics in the RAVE-TGAS and LAMOST-TGAS samples of Solar neighbourhood stars. These methods yield a nominal distance accuracy of 1-2%. Other than common tests on parallax accuracy, they directly test distance estimations including the effects of distance priors. We show how to construct these priors including the survey selection functions (SSFs) directly from the data. We demonstrate that neglecting the SSFs causes severe distance biases. Due to the decline of the SSFs in distance, the simple 1/parallax estimate only mildly underestimates distances. We test the accuracy of measured line-of-sight velocities (v_los) by binning the samples in the nominal v_los uncertainties. We find: a) the LAMOST v_los have a ~ -5 km/s offset; b) the average LAMOST measurement error for v_los is ~7 km/s, significantly smaller than, and nearly uncorrelated with the nominal LAMOST estimates. The RAVE sample shows either a moderate distance underestimate, or an unaccounted source of v_los dispersion (e_v) from measurement errors and binary stars. For a subsample of suspected binary stars in RAVE, our methods indicate significant distance underestimates. Separating a sample in metallicity or kinematics to select thick-disc/halo stars, discriminates between distance bias and e_v. For LAMOST, this separation yields consistency with pure v_los measurement errors. We find an anomaly near longitude l~(300+/-60)deg and distance s~(0.32+/-0.03)kpc on both sides of the galactic plane, which could be explained by either a localised distance error or a breathing mode.
description: 21 pages, 14 figures accepted by MNRAS; now also includes comparison to Astraatmadja & Bailer-Jones distances
Participant information sheet for online survey "The use of CFTR modulators and gut symptoms in Cystic Fibrosis"
Creators: name: Calthorpe, Rebecca
name: Smyth, Alan R
Publisher: name: figshare
Year: 2023
Subjects: Other health sciences not elsewhere classified

description: Participant information sheet (PIS) for the 2022 online survey "The use of CFTR modulators and gut symptoms in Cystic Fibrosis". Participants were given the link to the PIS as part of the consent process for the online survey.
FDM-"Schiffbrüche" aus dem Forschungsalltag und was Sie daraus lernen können
Creators: name: Fliegner, Angelika
name: Raatz, Philip
name: Schick, Elena
Publisher: name: Zenodo
Year: 2022
Subjects: Forschungsdatenmanagement
FAIR

description: In der Veranstaltung „FDM-‚Schiffbrüche‘ aus dem Forschungsalltag und was Sie daraus lernen können“ haben die Teilnehmer*innen Einblick bekommen in die Erfahrungen und Praxisbeispiele aus dem Projekt FDMScouts.nrw. Seit zwei Jahren unterstützen und beraten die FDMScouts Forschende bei ihrem Umgang mit Forschungsdaten. Die „Schiffbrüche“, die sie dabei erlebt haben, sind in diese Veranstaltung eingeflossen. Aber auch Informationen, wie diese zu retten waren, und wie durch planvolles Handeln künftigen FDM-Unglücksfällen vorgebeugt werden kann. Die Vortragenden gingen auf unterschiedliche Hürden und Herausforderungen im Bereich des Forschungsdatenmanagements ein, z. B. verlorene Daten, vergessene Einwilligungserklärungen oder verwirrende Ablagestrukturen. Der Vortrag richtete sich an Forschende an Hochschulen für angewandte Wissenschaften und Fachhochschulen sowie an Mitarbeiter*innen aus der Infrastruktur. Die Veranstaltung fand im Rahmen des Tags der Forschungsdaten 2022 am 15.11.2022 statt unter dem Motto „Leuchtturm FDM: Orientierung im Datenmeer“. Nachfolgend finden Sie die zur Veranstaltung erstellten Folien. Die Originalpräsentation ist über Conceptboard einsehbar: https://app.conceptboard.com/board/a8g8-kf7q-7dix-e38z-4h9x
Charged Lifshitz black hole and probed Lorentz-violation fermions from holography
Creators: name: Luo, Cheng-Jian
name: Kuang, Xiao-Mei
name: Shu, Fu-Wen
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We analytically obtain a new charged Lifshtitz solution by adding a non-relativistic Maxwell field in Horava-Lifshitz gravity. The black hole exhibits an anisotropic scaling between space and time (Lifshitz scaling) in the UV limit, while in the IR limit, the Lorentz invariance is recovered. We introduce the probed Lorentz-violation fermions into the background and holographically investigate the spectral properties of the dual fermionic operator. The Lorentz-violation of fermions will enhance the peak and corresponds larger fermi momentum, which compensates the non-relativistic bulk effect of the dynamical exponent. For a fixed $z$, when the Lorentz-violation of fermions increases to a critical value, the behavior of the low energy excitation goes from a non-Fermi liquid type to a fermi liquid type, which implies a kind of phase transition.
description: minor revisions, references added, published version
Dreidimensionale Multi-Material-Bauteile
Creators: name: Kopp, Sebastian-Paul
name: Roth, Stephan
Publisher: name: Zenodo
Year: 2023
Subjects: SFB 814 Additive Fertigung Abschlusskolloqium

description: Das Ziel des Projekts besteht darin, neue Fertigungsansätze zu erarbeiten, die das Laserstrahlschmelzen von Kunststoffen mit dem elektrophotographischen Pulverauftrag kombinieren, um thermoplastische Multi-Material-Bauteile herzustellen. Der Einsatz der Elektrophotographie ermöglicht eine schnelle und hochpräzise Präparation von Multi-Material-Pulverschichten. Dabei ist es wichtig, den Prozess und die Materialeigenschaften in Abstimmung miteinander zu berücksichtigen, unter Berücksichtigung der Randbedingungen der entwickelten (quasi-) simultanen, intensitätsselektiven Bestrahlungsstrategie. Diese Strategie erlaubt die gleichzeitige Konsolidierung von Werkstoffen mit deutlich unterschiedlichen thermischen Eigenschaftsprofilen.
Laserstrahlschmelzen von Kunststoffen mit reaktiven Flüssigsystemen
Creators: name: Setter, Robert
name: Wudy, Katrin
Publisher: name: Zenodo
Year: 2023
Subjects: SFB 814 Additive Fertigung Abschlusskolloqium

description: Das Ziel des Teilprojekts B7 besteht darin, durch die Integration von reaktiven Flüssigsystemen in einem kombinierten Laserstrahlschmelzprozess von Kunststoffen (KLSS-K) erstmals verschiedene Kunststoffklassen zu einem Multi-Material-Bauteil zu vereinen. Diese Klassen umfassen unter anderem teilkristalline Thermoplaste und vernetzende Systeme. Im Rahmen des Projekts wird die Wechselwirkung zwischen dem reaktiven Flüssigsystem und dem thermoplastischen Werkstoff, der durch Laserstrahlung geschmolzen wird, wissenschaftlich erforscht. Zudem werden verschiedene Prozessstrategien zur Herstellung von Hart/Weich-Verbindungen evaluiert.
Classifying initial conditions of long GRBs modeled with relativistic radiation hydrodynamics
Creators: name: Rivera-Paleo, F. J.
name: Núñez, C. E. López
name: Guzmán, F. S.
name: González, J. A
Publisher: name: arXiv
Year: 2017
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present a method to classify initial conditions of a long gamma ray bursts model sourced by a single relativistic shock. It is based on the use of artificial neural networks (ANNs) that are trained with light curves (LC) generated with radiation relativistic hydrodynamics simulations. The model we use consists in a single shock with a highly relativistic injected beam into a stratified surrounding medium with profile $1/r^2$. In the process we only consider the bremsstrahlung radiation and Thomson scattering process. The initial conditions we use to train the ANN are three: the rest mass density, Lorentz factor and radiation energy density of the beam that produces the relativistic shock, together with the LC generated during the process. The classification selects the location of a box in the 3d parameter space that better fits a given LC, and in order to decrease the uncertainty of the parameters this box is refined and the classification selects a new box of smaller size.
description: 9 pages, 4 figures, 8 tables. Accepted for publication in Physical Review D. V2 incorporates the proof check corrections
Some exact Bradlow vortex solutions
Creators: name: Gudnason, Sven Bjarke
name: Nitta, Muneto
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We consider the Bradlow equation for vortices which was recently found by Manton and find a two-parameter class of analytic solutions in closed form on nontrivial geometries with non-constant curvature. The general solution to our class of metrics is given by a hypergeometric function and the area of the vortex domain by the Gaussian hypergeometric function.
description: LaTeX: 16 pages, no figures; V2: references added, minor additions; V3 (published version): toy model added as section 3 and conjecture 1 added in section 4.1
Robuste Struktur-Prozess-Optimierung
Creators: name: Hübner, Daniel
name: Stingl, Michael
Publisher: name: Zenodo
Year: 2023
Subjects: SFB 814 Additive Fertigung Abschlusskolloqium

description: Teilprojekt C2 widmet sich der Topologie- und Materialoptimierung (MO) im Zusammenhang mit der additiven Fertigung (AF). Basierend auf den in der zweiten Phase entwickelten Konzepten zur Multimaterialoptimierung, die eine Berücksichtigung prozessabhängiger Materialeigenschaften ermöglichen, liegt der Fokus nun auf multifunktionalen Bauteilen. Durch die Integration graduierter Gitterstrukturen, die sich unter anderem für die Knickstabilität und die Umsetzung dynamischer Eigenschaften als nützlich erweisen, wird die Designfreiheit der additiven Fertigung bestmöglich ausgeschöpft.
A fractional reaction-diffusion description of supply and demand
Creators: name: Benzaquen, Michael
name: Bouchaud, Jean-Philippe
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mathematical Finance (q-fin.MF)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Economics and business
subject: FOS: Physical sciences

description: We suggest that the broad distribution of time scales in financial markets could be a crucial ingredient to reproduce realistic price dynamics in stylised Agent-Based Models. We propose a fractional reaction-diffusion model for the dynamics of latent liquidity in financial markets, where agents are very heterogeneous in terms of their characteristic frequencies. Several features of our model are amenable to an exact analytical treatment. We find in particular that the impact is a concave function of the transacted volume (aka the "square-root impact law"), as in the normal diffusion limit. However, the impact kernel decays as $t^{-β}$ with $β=1/2$ in the diffusive case, which is inconsistent with market efficiency. In the sub-diffusive case the decay exponent $β$ takes any value in $[0,1/2]$, and can be tuned to match the empirical value $β\approx 1/4$. Numerical simulations confirm our theoretical results. Several extensions of the model are suggested.
description: 7 pages, 2 figures
Makroskopische Modellierung, Simulation und Optimierung strahlbasierter Fertigungsprozesse mit pulverförmigen Ausgangswerkstoffen
Creators: name: Burkhardt, Christian
name: Soldner, Dominic
name: Mergheim, Julia
Publisher: name: Zenodo
Year: 2023
Subjects: SFB 814 Additive Fertigung Abschlusskolloqium

description: Das Ziel des Teilprojekts besteht darin, das Simulationswerkzeug für LSS-K, LSS-M und SEBM aus den ersten beiden Förderperioden zu einer hierarchischen Simulationsumgebung zu erweitern. Dadurch sollen bauteil- und problemangepasste Simulationsstrategien entwickelt und qualifiziert werden. Hierfür werden reduzierte physikalische Modelle, Kompensationsstrategien zur Fehlerreduktion und effiziente Algorithmen wie adaptive Multi-Raten-Zeitintegratoren angewendet. Die durchgeführten Prozesssimulationen, die Bauteile mit einem Volumen von bis zu 1000 cm³ umfassen, sollen die Prozesssteuerung unterstützen, um eine reproduzierbare Herstellung von Bauteilen mit definierten Eigenschaften zu ermöglichen.
Radiation Hydrodynamic Simulations of Dust-Driven Winds
Creators: name: Zhang, Dong
name: Davis, Shane W.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We study dusty winds driven by radiation pressure in the atmosphere of a rapidly star-forming environment. We apply the variable Eddington tensor algorithm to re-examine the two-dimensional radiation hydrodynamic problem of a column of gas that is accelerated by a constant infrared radiation flux. In the absence of gravity, the system is primarily characterized by the initial optical depth of the gas. We perform several runs with different initial optical depth and resolution. We find that the gas spreads out along the vertical direction, as its mean velocity and velocity dispersion increase. In contrast to previous work using flux-limited diffusion algorithm, we find little evolution in the trapping factor. The momentum coupling between radiation and gas in the absence of gravity is similar to that with gravity. For Eddington ratio increasing with the height in the system, the momentum transfer from the radiation to the gas is not merely $\sim L/c$, but amplified by a factor of $1+ητ_{\rm IR}$, where $τ_{\rm IR}$ is the integrated infrared optical depth through the system, and $η\sim0.5-0.9$, decreasing with the optical depth. We apply our results to the atmosphere of galaxies and conclude that radiation pressure may be an important mechanism for driving winds in the most rapidly star-forming galaxies and starbursts.
description: 12 pages, 10 figures, 1 table, Accepted for publication in ApJ
Integral Field Spectroscopy of the inner kpc of the elliptical galaxy NGC 5044
Creators: name: Diniz, Suzi I. F.
name: Pastoriza, Miriani G.
name: Hernandez-Jimenez, Jose A.
name: Riffel, Rogério
name: Ricci, Tiago V.
name: Steiner, João E.
name: Riffel, Rogemar A.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We used Gemini Multi-Object Spectrograph (GMOS) in the Integral Field Unit mode to map the stellar population, emission line flux distributions and gas kinematics in the inner kpc of NGC 5044. From the stellar populations synthesis we found that the continuum emission is dominated by old high metallicity stars ($\sim$13 Gyr, 2.5Z$\odot$). Also, its nuclear emission is diluted by a non thermal emission, which we attribute to the presence of a weak active galactic nuclei (AGN). In addition, we report for the first time a broad component (FWHM$\sim$ 3000km$s^{-1}$) in the H$α$ emission line in the nuclear region of NGC 5044. By using emission line ratio diagnostic diagrams we found that two dominant ionization processes coexist, while the nuclear region (inner 200 pc) is ionized by a low luminosity AGN, the filamentary structures are consistent with being excited by shocks. The H$α$ velocity field shows evidence of a rotating disk, which has a velocity amplitude of $\sim$240kms$^{-1}$ at $\sim$ 136 pc from the nucleus. Assuming a Keplerian approach we estimated that the mass inside this radius is $1.9\times10^9$ $M_{\odot}$, which is in agreement with the value obtained through the M-$σ$ relation, $ M_{SMBH}=1.8\pm1.6\times10^{9}M_{\odot}$. Modelling the ionized gas velocity field by a rotating disk component plus inflows towards the nucleus along filamentary structures, we obtain a mass inflow rate of $\sim$0.4 M$_\odot$. This inflow rate is enough to power the central AGN in NGC 5044.
description: 16 pages, 12 figures, accepted by MNRAS
Geometrische Bauteilprüfung
Creators: name: Baumgärtner, Benjamin
name: Hausotte, Tino
Publisher: name: Zenodo
Year: 2023
Subjects: SFB 814 Additive Fertigung Abschlusskolloqium

description: Im Rahmen dieses Projekts wird angestrebt, die metrologische Rückführung der geometrischen Porenmessung mittels Röntgen-Computertomografie (CT) zu realisieren. Das Ziel besteht darin, die Aussagekraft der CT bei der Bewertung von Fertigungsprozessfehlern zu erhöhen. Hierfür soll die Rückführung mithilfe hochauflösender optischer Referenzmessungen an transparenten Normalkörpern erreicht werden. Durch experimentelle und simulationsbasierte Untersuchungen wird sichergestellt, dass diese Rückführung auch auf additiv gefertigte Metall- und Kunststoffbauteile übertragbar ist, um eine genaue Angabe der Messunsicherheit zu ermöglichen.
Learning Proximal Operators: Using Denoising Networks for Regularizing Inverse Imaging Problems
Creators: name: Meinhardt, Tim
name: Moeller, Michael
name: Hazirbas, Caner
name: Cremers, Daniel
Publisher: name: arXiv
Year: 2017
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: While variational methods have been among the most powerful tools for solving linear inverse problems in imaging, deep (convolutional) neural networks have recently taken the lead in many challenging benchmarks. A remaining drawback of deep learning approaches is their requirement for an expensive retraining whenever the specific problem, the noise level, noise type, or desired measure of fidelity changes. On the contrary, variational methods have a plug-and-play nature as they usually consist of separate data fidelity and regularization terms. In this paper we study the possibility of replacing the proximal operator of the regularization used in many convex energy minimization algorithms by a denoising neural network. The latter therefore serves as an implicit natural image prior, while the data term can still be chosen independently. Using a fixed denoising neural network in exemplary problems of image deconvolution with different blur kernels and image demosaicking, we obtain state-of-the-art reconstruction results. These indicate the high generalizability of our approach and a reduction of the need for problem-specific training. Additionally, we discuss novel results on the analysis of possible optimization algorithms to incorporate the network into, as well as the choices of algorithm parameters and their relation to the noise level the neural network is trained on.
Spherical collapse and virialization in $f(T)$ gravities
Creators: name: Lin, Rui-hui
name: Zhai, Xiang-hua
name: Li, Xin-zhou
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Using the classical top-hat profile, we study the non-linear growth of spherically symmetric density perturbation and structure formation in $f(T)$ gravities. In particular, three concrete models, which have been tested against the observation of large-scale evolution and linear perturbation of the universe in the cosmological scenario, are investigated in this framework, covering both minimal and nonminimal coupling cases of $f(T)$ gravities. Moreover, we consider the virialization of the overdense region in the models after they detach from the background expanding universe and turn around to collapse. We find that there are constraints in the magnitude and occurring epoch of the initial perturbation. The existence of these constraints indicates that a perturbation that is too weak or occurs too late will not be able to stop the expanding of the overdense region. The illustration of the evolution of the perturbation shows that in $f(T)$ gravities, the initial perturbation within the constraints can eventually lead to clustering and form structure. The evolution also shows that nonminimal coupling models collapse slower than the minimal coupling one.
description: 19 pages,5 figures
Mesoskopische Modellierung und Simulation der Eigenschaften additiv gefertigter metallischer Bauteile
Creators: name: Herrnböck, Ludwig
name: Yang, Zerong
name: Markl, Matthias
name: Körner, Carolin
name: Steinmann, Paul
Publisher: name: Zenodo
Year: 2023
Subjects: SFB 814 Additive Fertigung Abschlusskolloqium

description: Das Hauptziel dieses Teilprojekts besteht darin, den Einfluss der Bauteilränder auf die resultierende Material- und Bauteil-Mesostruktur bei pulver- und strahlbasierten additiven Fertigungsverfahren für Metalle zu untersuchen. Dabei werden die meso- und makroskopischen mechanischen Eigenschaften dieser Strukturen modellbasiert bestimmt, unter Berücksichtigung der Erkenntnisse aus den bisherigen Teilprojekten B4 und C5. Besonderes Augenmerk wird auf zellulare Gitterstrukturen gelegt, bei denen das mechanische Verhalten dieser Mesostrukturen sowie der Einfluss fertigungsbedingter geometrischer Unsicherheiten numerisch modelliert, verifiziert, quantifiziert und validiert werden.
A geometric second-order-rectifiable stratification for closed subsets of Euclidean space
Creators: name: Menne, Ulrich
name: Santilli, Mario
Publisher: name: arXiv
Year: 2017
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 52A20 (Primary), 28A78, 49Q15 (Secondary)

description: Defining the $m$-th stratum of a closed subset of an $n$ dimensional Euclidean space to consist of those points, where it can be touched by a ball from at least $n-m$ linearly independent directions, we establish that the $m$-th stratum is second-order rectifiable of dimension $m$ and a Borel set. This was known for convex sets, but is new even for sets of positive reach. The result is based on a new criterion for second-order rectifiability.
description: 13 pages. v2: corrected a typographical error in the introduction, and updated the affiliation of the first author
Quasinormal modes as a distinguisher between general relativity and f(R) gravity
Creators: name: Bhattacharyya, Soham
name: Shankaranarayanan, S.
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Quasi-Normal Modes (QNM) or ringdown phase of gravitational waves provide critical information about the structure of compact objects like Black Holes. Thus, QNMs can be a tool to test General Relativity (GR) and possible deviations from it. In the case of GR, it is known for a long time that a relation between two types of Black Hole perturbations: scalar (Zerilli) and vector (Regge-Wheeler), leads to an equal share of emitted gravitational energy. With the direct detection of Gravitational waves, it is now natural to ask: whether the same relation (between scalar and vector perturbations) holds for modified gravity theories? If not, whether one can use this as a way to probe deviations from General Relativity. As a first step, we show explicitly that the above relation between Regge-Wheeler and Zerilli breaks down for a general f (R) model, and hence the two perturbations do not share equal amounts of emitted gravitational energy. We discuss the implication of this imbalance on observations and the no-hair conjecture.
description: 9 pages, 2 figures, version as accepted in Physical Review D
title: Контроллинг және логистикалық тәуекелдерді басқару
Creators: name: ELS IPR BOOKS
Publisher: name: EDP Hub (Идипи Хаб), Ай Пи Ар Медиа
Year: 2024

description: Оқу құралында дәрістердің конспектілері, оларды талқылауға арналған сұрақтар, оқу материалдарын меңгеру деңгейін тексеруге арналған бақылау сынақтары, ситуациялық тапсырмалар келтірілген. Құралда стратегиялық және жедел логистикалық контроллингтің мазмұны, кәсіпорындағы логистикалық үдерістерді ұйымдастыру, логистикалық жүйедегі қызмет аралық өзара байланыс, логистикалық тәуекелдер деңгейін төмендету мен талдау әдістемесі секілді сұрақтарға ерекше назар аударылады. «Контроллинг және логистикалық тәуекелдерді басқару» пәнін оқитын «Логистика» бағыты бойынша оқитын студенттерге арналған. Сонымен қатар, оқу құралының материалдары жоғары оқу орындарында сабақ беретін оқытушыларға да пайдалы.
Strong correlations between the exponent $α$ and the particle number for a Renyi-monoatomic gas in Gibbs' statistical mechanics
Creators: name: Plastino, A.
name: Rocca, M. C.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: Appealing to the 1902 Gibbs' formalism for classical statistical mechanics (SM), the first SM axiomatic theory ever that successfully explained equilibrium thermodynamics, we will here show that already at the classical level there is a strong correlation between the Renyi's exponent $α$ and the number of particles for very simple systems. No reference to heat baths is needed for such a purpose.
description: Title has changed. Text has changed. 1 figure added
The complete chloroplast genome sequence of the Korean maple tree (Acer pseudosieboldianum (Pax) Kom.)
Creators: name: Kim, Hyoung Tae
name: Kim, Jung Sung
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biochemistry
subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Molecular Biology
subject: Evolutionary Biology
classificationCode: 59999
subject: Environmental Sciences not elsewhere classified
subject: Ecology
classificationCode: 69999
subject: Biological Sciences not elsewhere classified
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
classificationCode: 110309
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Plant Biology
classificationCode: 60506
subject: Virology

description: The complete chloroplast genome sequence of Acer pseudosieboldianum (Sapindaceae) was determined. The chloroplast genome of A. pseudosieboldianum is 157,053 bp in length with two inverted repeats (26,747 bp) between a large single-copy (85,391 bp) and a small single-copy (18,168 bp). The GC content was 37.8% and it was composed of 86 coding genes, eight rRNA genes, 37 tRNA genes, and two pseudogenes, rps2, and ycf1. Molecular phylogenetic analysis based on the plastid genome sequences strongly supported the hypothesis that A. pseudosieboldianum was embedded in the series Palmata of section Palmata. However, the phylogenetic positions of A. ukurunduense and A. buergerianum, which are a members of the series Penninervia of sections Palmata and Pentaphylla, respectively, were incongruent with the recent sectional classification system.
The complete mitochondrial genome of Choristoneura metasequoiacola Liu,1983 (Lepidoptera: Tortricidae)
Creators: name: Liang, Yun
name: Fang, Xinyuan
name: Zheng, Lingzhi
name: Wu, Hongmin
name: He, Zewei
name: Xiong, Zhongwu
name: Hong, Jianfeng
name: Ai, Xunru
name: Liang, Guanghong
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Evolutionary Biology
classificationCode: 59999
subject: Environmental Sciences not elsewhere classified
subject: Ecology
classificationCode: 69999
subject: Biological Sciences not elsewhere classified
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Plant Biology

description: Choristoneura metasequoiacola Liu, 1983 is an important caterpillar species that specifically infests the leaves and branches of Metasequoia glyptostroboides Hu & W. C. Cheng 1948 with short larval infestations, long-term dormancy, and has a limited distribution in Lichuan, Hubei, China. The complete mitochondria genome of C. metasequoiacola was determined by using Illumina NovaSeq, and analyzed based on previously annotated sibling species. In total, we obtained mitochondria genome with 15,128 bp in length, circular in shape with a double-stranded closed ring structure, including 13 protein-coding genes, 2 rRNA genes, 22 tRNA genes, and an AT-rich region. Of which the nucleotide composition was highly A + T biased, accounting for 81.98% of the whole mitogenome. Thirteen protein-coding genes (PCGs) were 11,142 bp; Twenty-two tRNA genes and AT-rich region were 1,472 and 199 bp, respectively. Phylogenetically, the relationship between Choristoneura spp. (containing C. metasequoiacola) and Adoxophyes spp. was closer than any other two genera from Tortricidae, and the relationship between C. metasequoiacola and C.murinana was the closest among nine sibling species from that genus, which helps to explain species evolution within the family Tortricidae.
Complete mitochondrial genome of Hydrolagus mitsukurii (Jordan & Snyder, 1904)
Creators: name: Wang, Xiaogu
name: Fang, Chen
name: Wang, Chunsheng
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Biochemistry
subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Evolutionary Biology
classificationCode: 59999
subject: Environmental Sciences not elsewhere classified
subject: Ecology
classificationCode: 69999
subject: Biological Sciences not elsewhere classified
subject: Cancer
subject: Science Policy

description: Holocephali has foreseeable value to help our understanding of vertebrate genome evolution due to its phylogenetic position. In this study, we reported a complete mitochondrial genome of Hydrolagus mitsukurii, a species of holocephalans. The mitochondrial genome is 20,486 bp in length and comprised 13 PCGs, 2 rRNA, 22 tRNA, and 1 control region (D-loop), as well as a long noncoding insertion between tRNAThr and tRNAPro. A phylogenetic tree based on 13 PCGs showed that Hydrolagus mitsukurii was grouped with the members of the family Chimaeridae. Furthermore, the phylogenetic tree further supported the paraphyletic clades of Hydrolagus and Chimera.
Noise-induced stabilization of collective dynamics
Creators: name: Clusella, Pau
name: Politi, Antonio
Publisher: name: arXiv
Year: 2017
Subjects: subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences

description: We illustrate a counter-intuitive effect of an additive stochastic force, which acts independently on each element of an ensemble of globally coupled oscillators. We show numerically and semi-analytically that a very small white noise is able to stabilize an otherwise linearly unstable collective periodic regime. Microscopic simulations reveal two noise-induced bifurcations of different nature towards self-consistent partial synchrony. We develop a macroscopic treatment solving the corresponding nonlinear Fokker-Planck equation by means of a perturbative approach. The associated linear stability analysis confirms the results anticipated by the numerics. We also argue about the generality of the phenomenon.
title: Контроллинг және логистикалық тәуекелдерді басқару
Creators: name: ELS IPR BOOKS
Publisher: name: EDP Hub (Идипи Хаб), Профобразование
Year: 2024

description: Оқу құралында стратегиялық және жедел логистикалық бақылаудың мазмұны, кәсіпорындағы логистикалық процестерді ұйымдастыру, логистикалық жүйедегі сервисаралық қатынастар, логистикалық тәуекелдерді талдау және төмендету әдістемесі қарастырылған. Оқу құралы «Логистика» техникалық және кәсіптік білім беру мамандығы бойынша оқитын студенттерге арналған «Логистика» пәнін оқитын.