cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Responses of Magnetically Sub-Critical Cores to Shocks
Creators: name: Vaidya, B.
name: Hartquist, T. W.
name: Falle, S. A. E. G.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: An ideal magnetohydrodynamics (MHD) code with adaptive mesh refinement (AMR) was used to investigate the interactions of fast-mode shocks with self-gravitating, isothermal cores with mass-to-flux ratios that are somewhat below the minimum value required for gravitational collapse. We find that shock focussing produces colliding flows along the field lines that generate very high densities, even for relatively weak shocks. Self-gravity plays only a minor role in determining the highest density that is reached, but it does play a role in the subsequent evolution. The densities at comparable times differ by a factor of a few for shocks initially propagating perpendicularly or obliquely to the magnetic field in the ambient medium.
description: 5 pages, 3 figures, accepted for publication in MNRAS
Erratum: Revisiting coupling selection rules in heterotic orbifold models (Journal of High Energy Physics (2012) 05 (008))
Creators: name: Kobayashi, Tatsuo
name: Parameswaran, Susha L.
name: Ramos-Sánchez, Saul
name: Zavala, Ivonne
Publisher: name: Heidelberg : Springer Verlag
Year: 2012
Subjects: subject: Superstrings and Heterotic Strings
subject: Conformal Field Models in String Theory
subject: Global Symmetries
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Erratum to: Revisiting coupling selection rules in heterotic orbifold models in: Journal of High Energy Physics (2012) 05:8
title: Влияние брачно-семейных отношений на быт ленинградских партизан
Creators: name: Колотушкин, Валерий
Publisher: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Year: 2019

description: Рассматриваются брачно-семейные отношения участников партизанского движения на территории Ленинградской области. Для людей, воюющих за линией фронта, большое значение имело сохранение письменной связи с семьями, эвакуированными в советский тыл. Некоторые партизаны выезжали к семьям. Заработная плата народных мстителей перечислялась членам семьи как форма материальной поддержки. В этих условиях было важным подтверждение участия в партизанском движении. Если семья партизана оставалась на оккупированной территории, захватчики занимались ее поиском с целью уничтожения или шантажа. Ключевым фактором партизанского движения сопротивления стала месть, но партизаны также принимали активные меры к спасению своих семей и семей своих товарищей по борьбе.
A fast and reliable method to measure stellar differential rotation from photometric data
Creators: name: Reinhold, Timo
name: Reiners, Ansgar
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Co-rotating spots at different latitudes on the stellar surface generate periodic photometric variability and can be useful proxies to detect Differential Rotation (DR). DR is a major ingredient of the solar dynamo but observations of stellar DR are rather sparse. In view of the Kepler space telescope we are interested in the detection of DR using photometric information of the star, and to develop a fast method to determine stellar DR from photometric data. We ran a large Monte-Carlo simulation of differentially rotating spotted stars with very different properties to investigate the detectability of DR. For different noise levels the resulting light curves are prewhitened using Lomb-Scargle periodograms to derive parameters for a global sine fit to detect periodicities. We show under what conditions DR can successfully be detected from photometric data, and in which cases the light curve provides insufficient or even misleading information on the stellar rotation law. In our simulations, the most significant period P1_{out} could be detected in 96.2% of all light curves. Detection of a second period close to P1_{out} is the signature of DR in our model. For the noise-free case, in 64.2% of all stars such a period was found. Calculating the measured latitudinal shear of two distinct spots α_{out}, and comparing it to the known original spot rotation rates shows that the real value is on average 3.2% lower. Comparing the total equator-to-pole shear $α$ to $α_{out}$ we find that $α$ is underestimated by 8.8%, esp. the detection of DR for stars with $α$ < 6% is challenging. Finally, we apply our method to four differentially rotating Kepler stars and find close agreement with results from detailed modeling. Our method is capable of measuring stellar rotation periods and detecting DR with relatively high accuracy and is suitable for large data sets.
description: accepted by A&A
A Multi-objective Perspective for Operator Scheduling using Fine-grained DVS Architecture
Creators: name: Mukherjee, Rajdeep
name: Ghosh, Priyankar
name: Dasgupta, Pallab
name: Pal, Ajit
Publisher: name: arXiv
Year: 2013
Subjects: subject: Other Computer Science (cs.OH)
subject: FOS: Computer and information sciences
subject: B.5.2

description: The stringent power budget of fine grained power managed digital integrated circuits have driven chip designers to optimize power at the cost of area and delay, which were the traditional cost criteria for circuit optimization. The emerging scenario motivates us to revisit the classical operator scheduling problem under the availability of DVFS enabled functional units that can trade-off cycles with power. We study the design space defined due to this trade-off and present a branch-and-bound(B/B) algorithm to explore this state space and report the pareto-optimal front with respect to area and power. The scheduling also aims at maximum resource sharing and is able to attain sufficient area and power gains for complex benchmarks when timing constraints are relaxed by sufficient amount. Experimental results show that the algorithm that operates without any user constraint(area/power) is able to solve the problem for most available benchmarks, and the use of power budget or area budget constraints leads to significant performance gain.
description: 18 pages, 6 figures, International journal of VLSI design & Communication Systems (VLSICS)
Non-meager free sets for meager relations on Polish spaces
Creators: name: Banakh, Taras
name: Zdomskyy, Lyubomyr
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Topology (math.GN)
subject: FOS: Mathematics
subject: 54E52, 54E50, 54D80

description: We prove that for each meager relation $E\subset X\times X$ on a Polish space $X$ there is a nowhere meager subspace $F\subset X$ which is $E$-free in the sense that $(x,y)\notin E$ for any distinct points $x,y\in F$.
description: 4 pages
Mensch vs Computer: Bildverarbeitung zur Erkennung überlappender Pflanzen = Human vs computer: Image processing to detect overlapping plants
Creators: name: Rath, Thomas
name: Pastrana, Julio
Publisher: name: Darmstadt : Kuratorium für Technik und Bauwesen in der Landwirtschaft e. V. (KTBL)
Year: 2012
Subjects: subject: Active shape model
subject: Image processing
subject: Overlapping problem
subject: Plant production
subject: Nicotiana tabacum
subject: Dewey Decimal Classification::600 | Technik::630 | Landwirtschaft, Veterinärmedizin

description: In order to solve the overlapping problem that occurs when performing identification of single plants, a computer base pattern recognition system was implemented. The presented technique has 3 general steps: The recognition of overlapping or non-overlapping leaves using ellipse detection; an ellipse landmarking step that allows the creation of deformable models that define specific characteristics of the plants and the use of ASMs (Active Shape Models) that permit the identification of plantlets in complex situation without having to use the extracted color information. This method was tested using overlapping Nicotiana tabacum seedlings. Furthermore, a comparison between the recognition of the computer system and the human perception shows that in average the brain-eye system performs better. However, there are cases where the implemented algorithm has better identification results than the identification performed by student drop-outs. The presented methodology is being used is a Laser based weed control system.
description: Zur Lösung des Überlappungsproblems bei der computergestützten Bildanalyse von Pflanzenbeständen wurde ein dreistufiger generalisierter Lösungsansatz entwickelt, der auf der Erkennung von freien oder überlappenden Ellipsen aufbaut. Aus Passmarken („Landmarks“) dieser Ellipsen wurden Lerndatensätze entwickelt, die es ermöglichten, überlagernde Pflanzen in unbekannten Situationen mithilfe eines ASM-Verfahrens (Active Shape Model) aus komplexen Bildern ohne Nutzung der spezifischen Farbinformation herauszufiltern. Das Verfahren wurde an überlappenden Keimpflanzen von Nicotiana tabacum getestet. Ein Vergleich zwischen computerbildanalytischer Erkennung und menschlicher Kognition ergab im Durchschnitt bessere Ergebnisse für die mit „Auge und Gehirn“ durchgeführte Auswertung. In einigen Fällen waren die entwickelten Algorithmen jedoch den Erkennungsergebnissen von Schulabgängern überlegen. Das entwickelte Verfahren wurde bereits zur Steuerung von Lasern für die Unkrautbekämpfung erfolgreich eingesetzt.
Production of strangeness -1 and -2 hypernuclei within a field theoretic model
Creators: name: Shyam, R.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We present an overview of a fully covariant formulation for describing the production of strangeness -1 and -2 hypernuclei using probes of different kinds. This theory is based on an effective Lagrangian picture and it focuses on production amplitudes that are described via creation, propagation and decay into relevant channel of intermediate baryonic resonance states in the initial collision of the projectile with one of the target nucleons. The bound state nucleon and hyperon wave functions are obtained by solving the Dirac equation with appropriate scalar and vector potentials. Specific examples are discussed for reactions which are of interest to current and future experiments on the hypernuclear production.
description: 6 pages, 5 figures, Proc. of the International Conference on Recent Trends in Nuclear Physics, Chitkara University, Himachal Pradesh India, Nov. 19-21, 2012
Ultrafast Feed Drilling of Carbon Fiber-Reinforced Thermoplastics
Creators: name: Kakinuma, Yasuhiro
name: Ishida, Takuki
name: Koike, Ryo
name: Klemme, Heiner
name: Denkena, Berend
name: Aoyama, Tojiro
Publisher: name: Amsterdam : Elsevier
Year: 2015
Subjects: subject: CFRTP
subject: Drilling
subject: High-performance drilling
subject: Aerospace industry
subject: Fiber reinforced plastics
subject: Reinforcement
subject: Thermoplastics
subject: Carbon fiber reinforced
subject: Dry condition
subject: Feasibility studies
subject: Feed-rates
subject: Rotational drilling
subject: Through-hole drilling
subject: Ultra-fast
subject: Reinforced plastics
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik

description: Carbon fiber-reinforced thermoplastics (CFRTP) are just beginning to be utilized for various applications such as aerospace, automobiles, and sporting goods in place of CFRPs, and the demand for through-hole drilling of CFRTPs is increasing. In this study, the machinability in drilling of CFRTPs under various conditions was experimentally analyzed in terms of the material properties, and a feasibility study of ultrafast feed drilling was conducted. The results showed that delamination at the outlet surface can be significantly suppressed during high rotational drilling when the feed rate is set to more than 3000 mm/min. By providing appropriate drilling conditions to prevent polymers in CFRTPs from softening, ultra-fast drilling of CFRTPs was successfully achieved under dry conditions.
Pinus mugo Turra
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: P. Mugo Turra (P. montana Miller) ssp. uncinata (Ramond) Domin Cat. XLIX,406und433. Vgl. Garns Lit. 1929, S. 85. Bis 2340 m. l: Ob Muraz (Oberli). - 2: Ob dem Portail de Fully, 2320m (Garns). - 3: Chemin-Verbier, mehrfach (F.). - 3a: Zwischen Engeloch und Bernetsch; Kastelberg ob Simplon-Dorf, hier über dem Spielwang gegen die Kessikumme bis etwa 2100m, vereinzelt bis 2340m gehend; Bleike- Flaschen; ob dem Thälstafel; Laggintal: rechte Seite des Rothgrabens sowie linke Seite des Guggeligrabens; Abhang des Feerbergs ob Gabi; Gondoschlucht und Plateau von Alpien, vielfach; südlich der Doveria zwischen Gondo und der italienischen Grenze; Zwischbergental:Bielgraben, Abhänge gegen die Alp Vaira. (Alles: Becherer 1942 und 1943; vgl. Becherer Lit. 1943, S. 45-46 und 59.) - 4: Aletschreservat (E. Frey); Binntal, bis 2040 m (ob Kehlmatten: Binz). Var.rotiindata (Link) Zenari- l: Outre-Rhone (Garns).- 2:Lens (Garns). - 3:Val d'Entremont; Val d'Anniviers; Mattertal (alles: Garns).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
YCr6Ge6 as a Candidate Compound for a Kagome Metal
Creators: name: Ishii, Yui
name: Harima, Hisatomo
name: Okamoto, Yoshihiko
name: Yamaura, Jun-ichi
name: Hiroi, Zenji
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: We show that YCr6Ge6, comprising a kagome lattice made up of Cr atoms, is a plausible candidate compound for a kagome metal that is expected to exhibit anomalous phenomena such as flat-band ferromagnetism. Resistivity, magnetization, and heat capacity are measured on single crystals of YCr6Ge6, and band structure calculations are performed to investigate the electronic structure. Curie-Weiss-like behavior in magnetic susceptibility, T2 dependence in resistivity, and a Sommerfeld coefficient doubly enhanced from a calculated value indicate a moderately strong electron correlation. Interestingly, the in-plane resistivity is twice as large as the interplane resistivity, which is contrary to the simple expectation from the layered structure. Band structure calculations demonstrate that there are partially flat bands slightly below the Fermi level near the Γ point, which is ascribed to Cr 3d3z2-r2 bands and may govern the properties of this compound.
description: 14 pages
‘Rewilding’ Later Prehistory: using palaeoenvironmental evidence to reveal the ‘wonder and enchantment’ of past wildlife, and to showcase archaeology’s central role in future nature recovery
Creators: name: Cooper, Anwen
name: Roushannafas, Tina
Publisher: name: The Archaeologist
Year: 2023

description: The Archaeologist, Vol. 119 (2023): The Archeologists
Temperature Dependence of Light Absorption by Water
Creators: name: Cumming, J. B.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: A model is described that relates the temperature coefficient of the optical absorption spectrum of pure water to the frequency derivative of that spectrum and two parameters that quantify the dependence of a peak's amplitude and its position on temperature. When applied to experimental temperature coefficients, it provides a better understanding of the process than the analysis currently in use.
First targeted search for gravitational-wave bursts from core-collapse supernovae in data of first-generation laser interferometer detectors
Creators: name: Abbott, B.P.
name: Allen, Bruce
name: Aufmuth, Peter
name: Bisht, A.
name: Danzmann, Karsten
name: Denker, T.
name: Heurs, M.
name: Kaufer, S.
name: Krueger, C.
name: Lough, J.D.
name: Lück, Harald
name: Sawadsky, A.
name: Schütte, D.
name: Steinmeyer, D.
name: Vahlbruch, H.
name: Willke, Benno
name: Wimmer, M.H.
name: Wittel, H.
name: Et Al.
name: LIGO Scientific Collaboration
name: Collaboration, Virgo
Publisher: name: College Park, MD : American Physical Society
Year: 2016
Subjects: subject: Gravitational waves
subject: Core-Collapse Supernovae
subject: Gravitationswelle
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We present results from a search for gravitational-wave bursts coincident with two core-collapse supernovae observed optically in 2007 and 2011. We employ data from the Laser Interferometer Gravitational-wave Observatory (LIGO), the Virgo gravitational-wave observatory, and the GEO 600 gravitational-wave observatory. The targeted core-collapse supernovae were selected on the basis of (1) proximity (within approximately 15 Mpc), (2) tightness of observational constraints on the time of core collapse that defines the gravitational-wave search window, and (3) coincident operation of at least two interferometers at the time of core collapse. We find no plausible gravitational-wave candidates. We present the probability of detecting signals from both astrophysically well-motivated and more speculative gravitational-wave emission mechanisms as a function of distance from Earth, and discuss the implications for the detection of gravitational waves from core-collapse supernovae by the upgraded Advanced LIGO and Virgo detectors. © 2016 The American Physical Society
The effect of planet-planet scattering on the survival of exomoons
Creators: name: Gong, Yan-Xiang
name: Zhou, Ji-Lin
name: Xie, Ji-Wei
name: Wu, Xiao-Mei
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Compared to the giant planets in the solar system, exoplanets have many remarkable properties such as the prevalence of giant planets on eccentric orbits and the presence of hot Jupiters. Planet-planet scattering (PPS) between giant planets is a possible mechanism in interpreting above and other observed properties. If the observed giant planet architectures are indeed the outcomes of PPS, such drastic dynamical process must affect their primordial moon systems. In this Letter, we discuss the effect of the PPS on the survival of their regular moons. From the viewpoint of observations, some preliminary conclusions are drawn from the simulations. 1. PPS is a destructive process to the moon systems, single planets on eccentric orbits are not the ideal moon-search targets. 2. If hot Jupiters formed through PPS, their original moons have little chance to survive. 3. Planets in multiple systems with small eccentricities are more likely holding their primordial moons. 4. Compared to the lower-mass planets, the massive ones in multiple systems may not be the preferred moon-search targets if the system underwent a PPS history.
description: published at ApJL
title: Una topografia della memoria: Praga e i suoi luoghi negli scritti autobiografici di alcuni emigrati russi
Creators: name: Tria, Massimo
Publisher: name: AvtobiografiЯ
Year: 2013

description: Relationships between Russian and Czech culture developed in a particularly strong way in the interwar period, after the arrival in Czechoslovakia of a large group of émigrés opposed to the Bolshevik regime. A major role was played by the autobiographical reflections written by the members of the intelligentsia, who were forced to operate in a new and different world from the one they were used to. One of the aims of the paper is to highlight some recurrent and distinctive features in the representation and evaluation of Prague in these autobiographical writings.
By taking into consideration some renowned writers (Mark Slonim, Marina Tsvetaeva), but also lesser known authors (Konstantin Chkheidze and Nikolai Terletskii) we come to the conclusion that they shared feelings of gratitude for a country they found to be, to different extents, a new homeland and that was praised for its ethnic and political open-­mindedness and for its capability of promoting intercultural dialogue.
Giant phase modulation in a Mach-Zehnder exciton-polariton interferometer
Creators: name: Sturm, C.
name: Tanese, D.
name: Nguyen, H. S.
name: Flayac, H.
name: Gallopin, E.
name: Lemaître, A.
name: Sagnes, I.
name: Solnyshkov, D.
name: Amo, A.
name: Malpuech, G.
name: Bloch, J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We report on a new mechanism of giant phase modulation. The phenomenon arises when a dispersed photonic mode (slow light) strongly couples to an excitonic resonance. In such a case, even a small amount of optically injected carriers creates a potential barrier for the propagating exciton-polariton which provokes a considerable phase shift. We evidence this effect by fabricating an exciton-polariton Mach-Zehnder interferometer, modulating the output intensity by constructive or destructive interferences controlled by optical pumping of a micrometric size area. The figure of merit for a π phase shift, defined by the control power times length of the modulated region, is found at least one order of magnitude smaller than slow light photonic crystal waveguides.
description: 18 pages, 6 figures
Simulation of Spalling with a Non-planar Bi-layered Interface Due to the Reuse of the Substrate
Creators: name: Berardone, Irene
name: Hensen, Jan
name: Steckenreiter, Verena
name: Kajari-Schröder, Sarah
name: Paggi, Marco
Publisher: name: London : Elsevier Ltd.
Year: 2016
Subjects: subject: Finite element modelling
subject: Fracture mechanics
subject: Kerfless wafering
subject: Thermomechanical spallation
subject: Aluminum
subject: Brittle fracture
subject: Crystalline materials
subject: Fracture
subject: Interfaces (materials)
subject: Numerical methods
subject: Silicon
subject: Silicon wafers
subject: Solar cells
subject: Spalling
subject: Substrates
subject: Thin film solar cells
subject: Crystalline silicons
subject: Experimental test
subject: Industrial context
subject: Layered interfaces
subject: Linear-elastic fracture mechanics
subject: Thermo-mechanical
subject: Finite element method
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: Kerfless wafering techniques have the potential to reduce the cost of crystalline silicon (Si) in photovoltaics by saving material and production costs. Thermomechanical spallation from thick wafers with aluminium (Al) in the double function as stressor layer and contacting layer in the final solar cell is one attractive option. In principle this technique might allow to produce multiple thin film solar cells via thermo-mechanical exfoliation, which is essential to be ascertaining for the technique in an industrial context. The aim of this study concerns the feasibility to reuse the parental Si substrate in the presence of non-planar Si-Al interface originated by the first exfoliation. A numerical method based on the Finite Element Method (FEM) and Linear Elastic Fracture Mechanics (LEFM) is used to simulate the evolution of the non-planar Si-Al interface after successive exfoliations. We find a partial reduction in the amplitude of the transferred groove on the Si-Al interface for grooves having typical realistic dimension. The numerical results are confirmed by the reduction of the amplitude of the groove observed in the experimental tests. These results are promising for the repeated exfoliation from one substrate, inasmuch as the possible roughness on the parental substrate after the first use does not significantly affect the subsequent exfoliations.
Exact Fourier Spectrum Recovery
Creators: name: Andrecut, M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: Discrete Fourier Transform (DFT) is widely used in signal processing to analyze the frequencies in a discrete signal. However, DFT fails to recover the exact Fourier spectrum, when the signal contains frequencies that do not correspond to the sampling grid. Here, we present an exact Fourier spectrum recovery method and we provide an implementation algorithm. Also, we show numerically that the proposed method is robust to noise perturbations.
description: 11 pages, 4 figures
A Framework for Semi-Automated Co-Evolution of Security Knowledge and System Models (Summary)
Creators: name: Burger, Jens
name: Strüber, Daniel
name: Gartner, Stefan
name: Ruhroth, Thomas
name: Jürjens, Jan
name: Schneider, Kurt
Publisher: name: Bonn : Gesellschaft fur Informatik (GI)
Year: 2019
Subjects: subject: Co-Evolution
subject: security knowledge
subject: system models
subject: Konferenzschrift
subject: Dewey Decimal Classification::000 | Allgemeines, Wissenschaft::000 | Informatik, Wissen, Systeme::004 | Informatik

description: We present a summary of our article published in Elsevier’s Journal of Systems and Software in 2018 [Bü18]. The presented approach has been developed in context of the SecVolution project, being part of the DFG SPP1593 Design For Future.
Sensitivity Analysis of a Simulation Model for the Determination of the Utilization of a Production Environment with the LPBF-Process
Creators: name: Ghannouchi, Aziz
name: Stittgen, Tobias
name: Schleifenbaum, Johannes Henrich
Publisher: name: Hannover : publish-Ing.
Year: 2021
Subjects: subject: Monte Carlo Method
subject: Latin Hypercube Sampling
subject: Variance Based Sensitivity Analysis
subject: Regional Sensitivity Analysis
subject: PAWN
subject: Additive Manufacturing
subject: Laser Powder Bed Fusion
subject: Production Logistics
subject: LPBF
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: Additive Manufacturing is on the brink of industrialization. In addition to the technical aspect, the aspect of production planning and optimization is continuously gaining importance with the technology being introduced into production environments. In order to allow a production logistics positioning for a production environment equipped with Laser Powder Bed Fusion machines, a simulation model has been developed at the RWTH Aachen University Chair for Digital Additive Production DAP. By means of this simulation model, production logistics key performance indicators (KPIs) such as the utilization are calculated as a function of nine parameters describing the production environment. To demonstrate the validity of the simulation model and allow a better understanding of its behaviour, the influence of each input on the utilization is investigated. In this study, a Global Sensitivity Analysis (GSA) based on the Monte Carlo method is performed to quantify the importance of the parameters. For this purpose, a Variance Based Sensitivity Analysis (VBSA) is conducted, followed by a Regional Sensitivity Analysis (RSA), and a GSA based on the PAWN method, allowing to perform all three settings of GSA, namely Factor Prioritization, Factor Fixing, and Factor Mapping. Finally, the knowledge brought by the sensitivity analysis allows for a user-friendly simplification of the production environment model, thus permitting a prioritized increase of the utilization.
Grains and grain boundaries in highly crystalline monolayer molybdenum disulfide
Creators: name: van der Zande, Arend M.
name: Huang, Pinshane Y.
name: Chenet, Daniel A.
name: Berkelbach, Timothy C.
name: You, Youmeng
name: Lee, Gwan-Hyoung
name: Heinz, Tony F.
name: Reichman, David R.
name: Muller, David A.
name: Hone, James C.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Recent progress in large-area synthesis of monolayer molybdenum disulfide, a new two-dimensional direct-bandgap semiconductor, is paving the way for applications in atomically thin electronics. Little is known, however, about the microstructure of this material. Here we have refined chemical vapor deposition synthesis to grow highly crystalline islands of monolayer molybdenum disulfide up to 120 um in size with optical and electrical properties comparable or superior to exfoliated samples. Using transmission electron microscopy, we correlate lattice orientation, edge morphology, and crystallinity with island shape to demonstrate that triangular islands are single crystals. The crystals merge to form faceted tilt and mirror boundaries that are stitched together by lines of 8- and 4- membered rings. Density functional theory reveals localized mid-gap states arising from these 8-4 defects. We find that mirror boundaries cause strong photoluminescence quenching while tilt boundaries cause strong enhancement. In contrast, the boundaries only slightly increase the measured in-plane electrical conductivity.
Potential Analysis Of Flexible Small Series Production Of Spare Parts By Direct Polymer Additive Tooling
Creators: name: Schuh, Günther
name: Bergweiler, Georg
name: Fiedler, Falko
name: Neumann, Daniel
name: Heetfeld, Lennart
name: Bickendorf, Philipp
Publisher: name: Hannover : publish-Ing.
Year: 2021
Subjects: subject: Additive Tooling
subject: Rapid Tooling
subject: Spare Parts
subject: Classic Cars
subject: Small Series Production
subject: Production System
subject: Production Concept
subject: Production Equipment
subject: Automotive Production
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: In recent decades, there has been an increasing creation of vehicle model variants and product individualization for customer needs. There is a need for a greater variety of spare parts which is leading to high requirements on their logistics. As a result of this trend, automotive production companies have to ensure the provision of many different spare parts as part of their post-fulfillment obligations. However, the surplus spare parts stock will increase the operation cost of the company. This implies the need for a more flexible approach to spare parts production and provision to improve profitability compared to existing process chains. In this research paper, the potential of flexible spare parts production and provision is discussed. For this purpose, the state of spare part production technologies and existing approaches for spare part service are analyzed regarding their technological characteristics, flexibility as well as cost structure. Following this, an approach for flexible production for spare parts with regard to its potential is analyzed and demonstrated based on three exemplary automotive use cases using additively manufactured production resources. In the casting use case, a Fused Filament Fabricated (FFF) additively manufactured speedometer screw model will be used as a sand casting form. The production of deep-drawn car body parts using polymer-based FFF forming tools is investigated in the second use case. Lastly, the production of ignition distributor caps by PolyJet Modelling (PJM) manufactured Injection Molding (PUR-RIM) molds is presented.
Use Of A Robot For Parts Provision In Manual Small Parts Assembly
Creators: name: Krampe, Michael
name: Penczek, Lars Niklas
name: Kuhlenkötter, Bernd
Publisher: name: Hannover : publish-Ing.
Year: 2021
Subjects: subject: assistant robotics
subject: assembly
subject: Logistics
subject: Ergonomics
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: Despite the growing popularity of automation, many companies still use manual assembly within their production. Especially when small deviations in product series are involved, automation is usually not flexible enough and does not add value. This paper describes a new robotic assistance system with the aim to support the worker by separating him from logistics and the choice of the next component. The robot should be the interface between manual assembly and logistics, it will grip the required component and deliver it to the worker. This results in a constellation where the assembly worker can focus on value-added assembly activities and work in a more ergonomic workspace, as there are no complex and overwhelming Kanban shelfs. The consistent use of storage containers means that the robot has no workplace where it must be flexible due to varying products. Furthermore, the logistics area does not have to be adapted to the assembly worker. This enables more efficient logistics solutions that would not be used in a normal manual assembly, such as shelves filled to the ground. In this context, the main challenge is to develop an efficient relationship between the worker and the robot. Here, communication possibilities between the worker and the robot must be investigated, in particular regarding the process flow and error management. Before we focus on new logistic software tools to automate the whole logistic process and to generate the code for the robot, we first want to show the efficiency of our concept by implementing it in form of a demonstrator and testing it on a selected industrial product. Afterwards we want to compare the efficiency and ergonomics of this new approach with the usual manual assembly process.
Identification of Cyber Security Risks in Subscription-based Business Models for Manufacturing Companies and Derivation of Suitable Measures
Creators: name: Schuh, Günther
name: Stich, Volker
name: Hicking, Jan
name: Kaminski, Lars
name: Engländer, Jacques
name: Majchrzak, Anna
Publisher: name: Hannover : publish-Ing.
Year: 2021
Subjects: subject: Cyber Security
subject: Subscription Business
subject: Manufacturing Companies
subject: Digital Transformation
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: In the age of digitalization, manufacturing companies are under increased pressure to change due to product complexity, growing customer requirements and digital business models. The increasing digitization of processes and products is opening up numerous opportunities for mechanical engineering companies to exploit the resulting potential for value creation. Subscription business is a new form of business model in the mechanical engineering industry, which aims to continuously increase customer benefit to align the interests of both companies and customers. Characterized by a permanent data exchange, databased learning about customer behavior, and the transfer into continuous innovations to increase customer value, subscription business helps to make Industry 4.0 profitable. The fact that machines and plants are connected to the internet and exchange large amounts of data results in critical information security risks. In addition, the loss of knowledge and control, data misuse and espionage, as well as the manipulation of transaction or production data in the context of subscription transactions are particularly high risks. Complementary to direct and obvious consequences such as loss of production, the attacks are increasingly shifting to nontransparent and creeping impairments of production or product quality, which are only apparent at a late stage, or the influencing of payment flows. A transparent presentation of possible risks and their scope, as well as their interrelationships, does not exist. This paper shows a research approach in which the structure of subscription models and their different manifestations based on their risks and vulnerabilities are characterized. This allows suitable cyber security measures to be taken at an early stage. From this basis, companies can secure existing or planned subscription business models and thus strengthen the trust of business partners and customers.
Optimization approach for the combined planning and control of an agile assembly system for electric vehicles
Creators: name: Burggräf, Peter
name: Dannapfel, Matthias
name: Adlon, Tobias
name: Riegauf, Aaron
name: Schukat, Esben
name: Schuster, Felix
Publisher: name: Hannover : publish-Ing.
Year: 2020
Subjects: subject: Automotive assembly
subject: Agile assembly
subject: Assembly control
subject: E-mobility production
subject: Factory planning
subject: Assembly planning
subject: Konferenzschrift
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: For some years now, the automotive industry has been challenged by growing market dynamics, shorter product lifecycles and customers' increasing demands for individualization. In order to cope with this development, the automotive assembly needs to adapt quickly to changing demands with a low level of investment in the future. Under the current circumstances, the traditional line assembly for high volume production is reaching its limits in terms of adaptability and scalability. A promising solution to address the current challenges is the concept of the agile assembly. The concept of agile assembly breaks up the rigid linkage of assembly stations and, thus, enables full flexibility in the sequence of assembly operations only limited by the precedence graph. Therefore, the routing of electric vehicles in the agile assembly is based on the availability of resources such as assembly stations and automated guided vehicles that handle the material supply. Further, by transferring the transport function to the vehicle itself, investments for convey or systems are eliminated. This research work presents an optimization approach for the machine scheduling and transportation planning, which derives instructions for electric vehicles, assembly stations as well as automated guided vehicles. For each electric vehicle, an optimized route is calculated, taking into account product-specific precedence graphs and minimizing the overall makespan. In addition, the machine scheduling and transportation planning is integrated into a combined planning and control concept which covers the allocation of resources and the assignment of capabilities of the entire assembly system. The approach is implemented and applied to a practical case of a compact electric vehicle. Thus, the work contributes to the evaluation of agile assembly systems in automotive production.
Baseline drift effect on the performance of neutron and gamma ray discrimination using frequency gradient analysis
Creators: name: Liu, Guofu
name: Luo, Xiaoliang
name: Yang, Jun
name: Lin, Cunbao
name: Hu, Qingqing
name: Peng, Jinxian
Publisher: name: arXiv
Year: 2013
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Frequency gradient analysis (FGA) effectively discriminates neutrons and gamma rays by examining the frequency-domain features of the photomultiplier tube anode signal. This approach is insensitive to noise but is inevitably affected by the baseline drift, similar to other pulse shape discrimination methods. The baseline drift effect is attributed to the factors such as power line fluctuation, dark current, noise disturbances, hum, and pulse tail in front-end electronics. This effect needs to be elucidated and quantified before the baseline shift can be estimated and removed from the captured signal. Therefore, the effect of baseline shift on the discrimination performance of neutrons and gamma rays with organic scintillation detectors using FGA is investigated in this paper. The relationship between the baseline shift and discrimination parameters of FGA is derived and verified by an experimental system consisting of an americium-beryllium source, a BC501A liquid scintillator detector, and a 5 GSPS 8-bit oscilloscope. Both theoretical and experimental results show that the estimation of the baseline shift is necessary, and the removal of baseline drift from the pulse shapes can improve the discrimination performance of FGA.
description: 14 pages,6 figures
title: О разных смыслах автобиографичности у О.Э. Мандельштама: на примере Шума времени
Creators: name: Sal’man, Marina
Publisher: name: AvtobiografiЯ
Year: 2013

description: A paragraph in Mandel’shtam autobiographical book The Noise of Time (i.e. the chapter Sinani’s family) is usually treated as bona fide biographical information testifying that Mandel’shtam was a member of socialist-­revolutionaries’ party and had come to Raivola in order to enter the terrorist organization of the party. Some formal peculiarities of the paragraph in question (syntactic and lexical features) give rise to doubts of such interpretation, which is further refuted by close analysis of the chronology of the events described, as well as by some documentary evidences. The passage on Raivola has special artistic function that can be elucidated by comparing it with other Mandel’shtam’s works, with contemporaries’ memoirs and some events of the time.
New iron-based Heusler compounds Fe2YZ: Comparison with theoretical predictions of the crystal structure and magnetic properties
Creators: name: Gasi, T.
name: Ksenofontov, V.
name: Kiss, J.
name: Chadov, S.
name: Nayak, A. K.
name: Nicklas, M.
name: Winterlik, J.
name: Schwall, M.
name: Klaer, P.
name: Adler, P.
name: Felser, C.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The present work reports on the new soft ferromagnetic Heusler phases Fe2NiGe, Fe2CuGa, and Fe2CuAl, which in previous theoretical studies have been predicted to exist in a tetragonal regular Heusler structure. Together with the known phases Fe2CoGe and Fe2NiGa these materials have been synthesized and characterized by powder XRD, 57 Fe Mössbauer spectroscopy, SQUID and EDX measurements. In particular Mössbauer spectroscopy was used to monitor the degree of local atomic order/disorder and to estimate magnetic moments at the Fe sites from the hyperfine fields. It is shown that in contrast to the previous predictions all the materials except Fe2NiGa basically adopt the inverse cubic Heusler (X-) structure with differing degrees of disorder. The disorder is more enhanced in case of Fe2NiGa, which was predicted as an inverse Heusler phase. The experimental data are compared with results from ab-inito electronic structure calculations on LDA level incorporating the effects of atomic disorder by using the coherent potential approximation (CPA). A good agreement between calculated and experimental magnetic moments is found for the cubic inverse Heusler phases. Model calculations on various atomic configurations demonstrate that antisite disorder tends to enhance the stability of the X-structure. Given the fundamental scientific and technological importance of tetragonal Heusler phases the present results call for further investigations to unravel the factors stabilizing tetragonal Heusler materials.
title: Searching for a New Self: Truth-­Telling and Double Vision in Joseph Brodsky’s Essay In a Room and a Half (1985)
Creators: name: Smith, Alexandra
Publisher: name: AvtobiografiЯ
Year: 2013

description: This article discusses Joseph Brodsky’s 1985 autobiographical essay In a Room and a Half. It argues that the use of the exilic discourse in the essay enables Brodsky to subvert the genre of autobiography as it was defined during the Enlightenment. His life story does not aspire to universalise. It attempts to reconcile the truth-­telling mnemonic writing with the attainment of a new identity that recognises his place within the Russian and the English speaking traditions, and takes account of postmodernist theories related to historicity, ethnic identity and the decentred subject.
Directional Emission of Dielectric Disks with a Finite Scatterer in the THz Regime
Creators: name: Preu, Sascha
name: Schmid, Sandra I.
name: Sedlmeir, Florian
name: Evers, Jörg
name: Schwefel, Harald G. L.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: In the Terahertz (THz) domain, we investigate both numerically and experimentally the directional emission of whispering gallery mode resonators that are perturbed by a small scatterer in the vicinity of the resonators rim. We determine quality factor degradation, the modal structure and the emission direction for various geometries. We find that scatterers do allow for directional emission without destroying the resonator's quality factor. This finding allows for new geometries and outcoupling scenarios for active whispering gallery mode structures such as quantum cascade lasers and passive resonators such as evanescent sensors. The experimental results agree well with finite difference time domain simulations.
title: Discussions
Creators: name: Soeting, Monica
name: Gullotta, Andrea
name: Karpenko, Elena
Publisher: name: AvtobiografiЯ
Year: 2013

description: In this section, we propose three texts that are not explicitly written with the intention to provoke a discussion, but rather gathered here thanks to the common characteristics of some issues raised, which call for reflection on one of the founding points of «AvtobiografiЯ».
As renown in Western Europe and the United States, over the past years the autobiographical discourse is no longer limited to the community of literary scholars and theorists. It has now become a specific topic of different disciplines, such as anthropology, political science, history, psychology, visual art, cultural studies and sociology.
title: Reviews
Creators: name: Gullotta, Andrea
name: Lazzarin, Francesca
name: Paolini, Sara
name: Criveller, Claudia
name: De Giorgi, Roberta
Publisher: name: AvtobiografiЯ
Year: 2013

description: Andrea Gullotta: Ivan Čistjakov, Diario di un guardiano del Gulag, con un saggio di Marcello Flores; Aleksandr Wat, Il mio secolo. Memorie e discorsi con Czesław Miłosz.
Francesca Lazzarin: S.Savickij, Častnyj čelovek. L. Ja. Ginzburg v konce 1920-ch-načale 1930-ch godov.
Сара Паолини: С. Н. ЕФИМОВА, Записная книжка писателя: стенограмма жизни.
Клаудия Кривеллер: Автор и биография, письмо и чтение, ред. сост. Ю.П. Зарецкий, В.П. Лихачев, А.Ю. Зарецкая, Изд. Дом Высшей школы экономики.
Roberta De Giorgi: V.F. Bulgakov, Kak prožita žizn’. Vospominanija poslednego sekretarja L.N. Tolstogo.
Roberta De Giorgi: Uchod L’va Tolstogo.