cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: From data to knowledge: integrating observational data to trace phytoplankton dynamics in a changing world
Creators: name: Longobardi, Lorenzo
Publisher: name: The Open University
Year: 2022

description: Phytoplankton are a fundamental component of marine systems. They are involved in the global regulation and functioning of biogeochemical and trophic processes and are strictly connected to human health and well-being through the provision of essential ecosystem services. Despite their fundamental importance, there is still no broad consensus on the mechanisms underlying their seasonal and interannual variability, while even less is known about the ecology of individual species and their response to climate variability given the scarcity of comprehensive long-term observation sets. Here, by taking advantage of high- frequency oceanographic and biological data collected over more than 25 years in a coastal pelagic Mediterranean site, I applied a set of statistical methods in order to investigate different aspects of community and individual species’ ecology, with a particular emphasis on the environmental factors and the mechanisms underlying phytoplankton phenology. Further, I analyzed long-term meteorological variations in the area and their relationships to large-scale climatic oscillation in order to address their impact on the planktonic system during the different seasons of the year. Finally, I integrated the data from 10 worldwide- distributed coastal time-series and investigated the adaptive potential of ubiquitous phytoplankton species to local conditions using a niche-based approach. The results of these analyses highlighted an impressive regularity in the annual occurrence of phytoplankton community and individual taxa despite a highly variable environment. Light was the predominant factor regulating species turnover and replacement and seemed to regulate endogenous biological processes associated with species-specific phenological patterns. Over the time series, a considerable stability was shown by individual species and the whole community, while the effects of climate fluctuation on the abiotic and biotic components revealed a strong dependence on the season. The comparison of phytoplankton niches across diverse biogeographical regions supported the idea of evolutionary adaptation, further emphasizing the importance of long-term ecological observations in the context of climate change. Overall, the results of these studies highlight the considerable resilience and the active role that phytoplankton plays under different environmental constraints, which contrasts the view of these organisms as passively undergoing external changes that occur at different temporal scales in their habitat, and show how, under certain conditions, endogenous biological processes prevail over environmental forcing.
Widerstandsverhalten von holzigen Auenpflanzen: Konzept zur Etablierung von Weichholzauen an Fließgewässern
Creators: name: Schneider, Sandra
Publisher: name: Karlsruhe
Year: 2010
Subjects: Widerstand
Vegetation
Auen
Hydraulik
Gewässerunterhaltung

description: Die Arbeit zeigt ein nachhaltiges Konzept zur Identifizierung von Weichholzauenstandorten an Fließgewässern auf. Die durchgeführten physikalischen Modelluntersuchungen und Geländeerhebungen hatten zum Ziel, den Einfluss unterschiedlicher Arten, Anordnungen und Besatzdichten für durch- und überströmte Auenbestände zu quantifizieren. Die Arbeit liefert umfangreiche Empfehlungen zur geeigneten Bestimmung der Widerstandsbeiwerte von Auenvegetation für unterschiedliche Sukzessionsstadien.
Approximate Assertional Reasoning Over Expressive Ontologies
Creators: name: Tserendorj, Tuvshintur
Publisher: name: Karlsruhe
Year: 2010
Subjects: ontology
reasoning
evaluation
approximation

description: In this thesis, approximate reasoning methods for scalable assertional reasoning are provided whose computational properties can be established in a well-understood way, namely in terms of soundness and completeness, and whose quality can be analyzed in terms of statistical measurements, namely recall and precision. The basic idea of these approximate reasoning methods is to speed up reasoning by trading off the quality of reasoning results against increased speed.
title: sarcophage_2
Creators: name: Théa Poullain
name: Galinand, Cyrille
name: Université Paris1 Panthéon-Sorbonne
Publisher: name: Archeovision
Year: 2022
Subjects: subject: sarcophage

description: sarcophage
description: 1 fichier 3D (ply), 1 fichier image (jpg)
The VMC Survey - I. Strategy and First Data
Creators: name: Cioni, M. -R. L.
name: Clementini, G.
name: Girardi, L.
name: Guandalini, R.
name: Gullieuszik, M.
name: Miszalski, B.
name: Moretti, M. -I.
name: Ripepi, V.
name: Rubele, S.
name: Bagheri, G.
name: Bekki, K.
name: Cross, N.
name: de Blok, W. J. G.
name: de Grijs, R.
name: Emerson, J. P.
name: Evans, C. J.
name: Gibson, B.
name: Gonzales-Solares, E.
name: Groenewegen, M. A. T.
name: Irwin, M.
name: Ivanov, V. D.
name: Lewis, J.
name: Marconi, M.
name: Marquette, J. -B.
name: Mastropietro, C.
name: Moore, B.
name: Napiwotzki, R.
name: Naylor, T.
name: Oliveira, J. M.
name: Read, M.
name: Sutorius, E.
name: van Loon, J. Th.
name: Wilkinson, M. I.
name: Wood, P. R.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The new VISual and Infrared Telescope for Astronomy (VISTA) has started operations. Over its first five years it will be collecting data for six public surveys, one of these is the near-infrared YJKsVISTA survey of the Magellanic Clouds system (VMC). This survey comprises the LMC, the SMC, the Bridge connecting the two galaxies and two fields in the Stream. This paper provides an overview of the VMC survey strategy and presents first science results. The main goals of the VMC survey are the determination of the spatially resolved SFH and 3D structure of the Magellanic system. Therefore, the VMC survey is designed to reach stars as faint as the oldest main sequence turn-off point and to constrain the mean magnitude of pulsating variable stars such as RR Lyrae stars and Cepheids. This paper focuses on observations of VMC fields in the LMC obtained between November 2009 and March 2010. These observations correspond to a 7% completeness of the LMC fields. The VMC observations consist of multi-epoch measurements organised following a specific structure. The data were reduced using the VISTA Data Flow System pipeline whose source catalogues were produced and made available via the VISTA Science Archive. The analysis of the data shows that the sensitivity in each wave band agrees with expectations. Uncertainties and completeness of the data are also derived. The first science results, aimed at assessing the science quality of the VMC data, include an overview of the distribution of stars in colour-magnitude and colour-colour diagrams, the detection of planetary nebulae and of stellar clusters, and the Ks band light-curve of variable stars. The VMC survey represents a tremendous improvement, in spatial resolution and sensitivity, on previous panoramic observations of the Magellanic system in the near-infrared and complements nicely the deep observations at other wavelengths. (Abridged)
description: 25 pages, 20 figures, accepted for publication by Astronomy & Astrophysics, high resolution version available at http://star.herts.ac.uk/~mcioni/vmc/
Beiträge zum Fail Safe Design
Creators: name: Wissner, Christian
Publisher: name: Karlsruhe
Year: 2010
Subjects: Fail Safe Design
Gestalt von Muschelschalen
Riss-Stopp
Rissumlenkung
Methode der Zugdreiecke

description: Risse sind als Vorboten oft katastrophalen Versagens gefürchtet.
Eine Rissbildung lässt sich, z. B. Kerbformoptimierung, vermeiden.
In dieser Arbeit wird eine weitere Möglichkeit vorgestellt: längs zur Belastungsrichtung angebrachte, formoptimierte Wülste.
Bestehende Risse können durch eine gezielte Umlenkung mit Querschlitzen, die mit der Methode der Zugdreiecke optimiert sind, gestoppt werden.
Vergleichende Analysen zeigen rechnerisch und experimentell einen deutlichen Vorteil.
title: Vase_31
Creators: name: Théa Poullain
name: Galinand, Cyrille
name: Université Paris1 Panthéon-Sorbonne
Publisher: name: Archeovision
Year: 2022
Subjects: subject: expérimentation
subject: poterie
subject: Vase

description: Vase céramique expérimental
description: 1 fichier 3D (ply), 1 fichier image (jpg)
Extrudate swell of high density polyethylene in capillary and slit dies
Creators: name: Konaganti, Vinod Kumar
Publisher: name: University of British Columbia
Year: 2017

description: The analysis of extrudate swell in polymer melts is of great importance in many polymer processing operations and has been the subject of interest both experimentally and numerically. The main objectives of this research work are to obtain systematic and reliable extrudate swell data of a high molecular weight HDPE, to identify a suitable constitutive model that can precisely represent extrudate swell phenomena and to predict extrudate swell accurately under various processing and operating conditions. A novel extrudate swell measuring system with an online data acquisition system is designed for the present work. This system allows one to measure extrudate swell profile under different conditions such as steady state or transient, gravity free, isothermal and non-isothermal conditions. Further, the set-up is suitable for both capillary and slit extrudates. A comprehensive analysis on the applicability and validity of various rheological (integral and differential/molecular) models in describing extrudate swell of a highly viscoelastic HDPE polymer over a broad range of shear rates (5 to 100s-¹) is carried out using FEM based ANSYS POLYFLOW®. The simulation results indicated that the integral constitutive equations of K-BKZ type can account for the significant memory effects of viscoelastic polymer melts such as HDPE. Overprediction of extrudate swell by the integral K-BKZ model invoked the importance of obtaining non-linear viscoelastic properties for a broader range of deformations/deformation rates. The newly available CPP fixture from AntonPaar is used to procure such non-linear viscoelastic data and thus to determine the accurate damping function. The simulation results of extrudate swell in capillary and slit dies are in good agreement with the experimental measurements using the newly determined damping function. In addition, non-isothermal extrudate swell of the HDPE polymer is studied using the pseudo-time integral K-BKZ Wagner (i.e., the non-isothermal form) model with the differential Nakamura equation for the crystallization kinetics. The model is implemented in ANSYS POLYFLOW®. Extrudate swell measurements are obtained by extruding the polymer melt at 200ºC through long capillary and slit dies to ambient air at 25ºC and 110ºC. The numerical results are found to be in very good agreement with the experimental observations.
Self-optimizing Machine Management
Creators: name: Kautzmann, Timo
name: Wünsche, Micaela
name: Geimer, Marcus
name: Schmeck, Hartmut
name: Mostaghim, Sanaz
Publisher: name: Karlsruhe
Year: 2010

description: Today’s machine management systems in off-highway machines are designed to optimize with respect to a target function without integrating the entire machine or considering environmental interactions. For that reason the interdisciplinary project OCOM – “Organic Computing in Off-highway Machines” started in February 2009 to design an architecture for an off-highway machine in order to close that gap. Optimization of fuel consumption is exemplarily chosen even though many other goals are reachable. This paper will introduce the generic architecture; first results will be presented.
Nonabelian Faddeev-Niemi Decomposition of the SU(3) Yang-Mills Theory
Creators: name: Evslin, Jarah
name: Giacomelli, Simone
name: Konishi, Kenichi
name: Michelini, Alberto
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Faddeev and Niemi (FN) have introduced an abelian gauge theory which simulates dynamical abelianization in Yang-Mills theory (YM). It contains both YM instantons and Wu-Yang monopoles and appears to be able to describe the confining phase. Motivated by the meson degeneracy problem in dynamical abelianization models, in this note we present a generalization of the FN theory. We first generalize the Cho connection to dynamical symmetry breaking pattern SU(N+1) -> U(N), and subsequently try to complete the Faddeev-Niemi decomposition by keeping the missing degrees of freedom. While it is not possible to write an on-shell complete FN decomposition, in the case of SU(3) theory of physical interest we find an off-shell complete decomposition for SU(3) -> U(2) which amounts to partial gauge fixing, generalizing naturally the result found by Faddeev and Niemi for the abelian scenario SU(N+1) -> U(1)^N. We discuss general topological aspects of these breakings, demonstrating for example that the FN knot solitons never exist when the unbroken gauge symmetry is nonabelian, and recovering the usual no-go theorems for colored dyons.
description: Latex 30 pages
title: platre_chapiteau
Creators: name: Théa Poullain
name: Galinand, Cyrille
name: Université Paris1 Panthéon-Sorbonne
Publisher: name: Archeovision
Year: 2022
Subjects: subject: chapiteau

description: chapiteau reproduction
description: 1 fichier 3D (ply), 1 fichier image (jpg)
Decomposition results for Gram matrix determinants
Creators: name: Banica, Teodor
name: Curran, Stephen
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics

description: We study the Gram matrix determinants for the groups $S_n,O_n,B_n,H_n$, for their free versions $S_n^+,O_n^+,B_n^+,H_n^+$, and for the half-liberated versions $O_n^*,H_n^*$. We first collect all the known computations of such determinants, along with complete and simplified proofs, and with generalizations where needed. We conjecture that all these determinants decompose as $D=\prod_πϕ(π)$, with product over all associated partitions.
description: 18 pages
title: sarcophage_1
Creators: name: Théa Poullain
name: Galinand, Cyrille
name: Université Paris1 Panthéon-Sorbonne
Publisher: name: Archeovision
Year: 2022
Subjects: subject: sarcophage

description: sarcophage
description: 1 fichier 3D (ply), 1 fichier image (jpg)
Economics of Distributed Storage Systems: An economic analysis of arbitrage-maximizing storage systems at the end consumer level
Creators: name: Ahlert, Klaus-Henning
Publisher: name: Karlsruhe
Year: 2010
Subjects: distributed storage systems
economic analysis
load and price forecasting
demand response
batteries

description: Increasing the shares of Renewable Energy Sources (RES) and Distributed Energy Resources (DER) is one of the most important levers in many countries to cope with the environmental, political, and economic challenges of future energy supply. The underlying research question of this thesis is whether Distributed Storage Systems (DSS) at the end consumer level can economically foster the integration of intermittent and non-dispatchable resources by providing demand-side flexibility.
The Last Neutrino Mixing angle theta13
Creators: name: Balantekin, A. B.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Among the still unmeasured neutrino properties, the third neutrino mixing angle, theta13, is likely to be the one we will next find out. In this contribution, first a brief summary of the limits and the preliminary measurements of this angle is given. Second a critical assessment of a widely used formula connecting two- and three-flavor evolution is provided.
description: Proceedings of "Nuclear Physics in Astrophysics V, April 2011", Eliat, Israel
title: Simulation of the nodal flow of mutant embryos with a small number of cilia
title: comparison of mechanosensing and vesicle transport hypotheses
titleType: Subtitle
Creators: name: Omori, Toshihiro
name: Winter, Katja
name: Shinohara, Kyosuke
name: Hamada, Hiroshi
name: Ishikawa, Takuji
Publisher: name: Universität Potsdam
Year: 2020
Subjects: subject: 500 Naturwissenschaften und Mathematik
subject: 600 Technik, Technologie

description: Left-right (L-R) asymmetry in the body plan is determined by nodal flow in vertebrate embryos. Shinohara et al. (Shinohara K et al. 2012 Nat. Commun. 3, 622 (doi:10.1038/ncomms1624)) used Dpcd and Rfx3 mutant mouse embryos and showed that only a few cilia were sufficient to achieve L-R asymmetry. However, the mechanism underlying the breaking of symmetry by such weak ciliary flow is unclear. Flow-mediated signals associated with the L-R asymmetric organogenesis have not been clarified, and two different hypotheses-vesicle transport and mechanosensing-are now debated in the research field of developmental biology. In this study, we developed a computational model of the node system reported by Shinohara et al. and examined the feasibilities of the two hypotheses with a small number of cilia. With the small number of rotating cilia, flow was induced locally and global strong flow was not observed in the node. Particles were then effectively transported only when they were close to the cilia, and particle transport was strongly dependent on the ciliary positions. Although the maximum wall shear rate was also influenced by ciliary position, the mean wall shear rate at the perinodal wall increased monotonically with the number of cilia. We also investigated the membrane tension of immotile cilia, which is relevant to the regulation of mechanotransduction. The results indicated that tension of about 0.1 mu Nm(-1) was exerted at the base even when the fluid shear rate was applied at about 0.1 s(-1). The area of high tension was also localized at the upstream side, and negative tension appeared at the downstream side. Such localization may be useful to sense the flow direction at the periphery, as time-averaged anticlockwise circulation was induced in the node by rotation of a few cilia. Our numerical results support the mechanosensing hypothesis, and we expect that our study will stimulate further experimental investigations of mechanotransduction in the near future.
description: Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe; 1056
Theoretical prediction of rotating magnon wavepacket in ferromagnets
Creators: name: Matsumoto, Ryo
name: Murakami, Shuichi
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We theoretically show that the magnon wavepacket has a rotational motion in two ways; a self-rotation and a motion along the boundary of the sample (edge current). They are similar to cyclotron motion of electrons, but unlike electrons the magnons have no charge and the rotation is not due to Lorenz force. These rotational motions are caused by the Berry phase in momentum space from magnon band structure. Furthermore, these rotational motions of the magnon give an additional correction term to the magnon Hall effect. We also discuss the Berry curvature effect in the classical limit of long-wavelength magnetostatic spin waves having macroscopic coherence length.
description: 4pages, 2figures, accepted for publication in Phys. Rev. Lett
New Model for VDT Associated Visual Comfort in Office Spaces
Creators: name: Moghbel, Niloofar
Publisher: name: Karlsruhe
Year: 2012
Subjects: Office space
Visual display
Veiling glare

description: In office rooms a significant aspect of visual discomfort is related to visual quality of computer screens and it's necessary to consider this visual quality as an important subject in quality of design. In this study a new method was developed to predict the visual quality of computer screen which is based on contrast reduction due to reflection. The new developed contrast model which is the basis of the new developed evaluation method is named the model of minimum required contrast.
title: Co-deposition of a hydrogel/calcium phosphate hybrid layer on 3D printed poly(lactic acid) scaffolds via dip coating
title: Towards automated biomaterials fabrication
titleType: Subtitle
Creators: name: Schneider, Matthias
name: Günter, Christina
name: Taubert, Andreas
Publisher: name: Universität Potsdam
Year: 2020
Subjects: subject: 540 Chemie und zugeordnete Wissenschaften

description: The article describes the surface modification of 3D printed poly(lactic acid) (PLA) scaffolds with calcium phosphate (CP)/gelatin and CP/chitosan hybrid coating layers. The presence of gelatin or chitosan significantly enhances CP co-deposition and adhesion of the mineral layer on the PLA scaffolds. The hydrogel/CP coating layers are fairly thick and the mineral is a mixture of brushite, octacalcium phosphate, and hydroxyapatite. Mineral formation is uniform throughout the printed architectures and all steps (printing, hydrogel deposition, and mineralization) are in principle amenable to automatization. Overall, the process reported here therefore has a high application potential for the controlled synthesis of biomimetic coatings on polymeric biomaterials.
description: Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe; 1057
On leaders and condensates in a growing network
Creators: name: Godreche, C.
name: Luck, J. M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The Bianconi-Barabasi model of a growing network is revisited. This model, defined by a preferential attachment rule involving both the degrees of the nodes and their intrinsic fitnesses, has the fundamental property to undergo a phase transition to a condensed phase below some finite critical temperature, for an appropriate choice of the distribution of fitnesses. At high temperature it exhibits a crossover to the Barabasi-Albert model, and at low temperature, where the fitness landscape becomes very rugged, a crossover to the recently introduced record-driven growth process. We first present an analysis of the history of leaders, the leader being defined as the node with largest degree at a given time. In the generic finite-temperature regime, new leaders appear endlessly, albeit on a doubly logarithmic time scale, i.e., extremely slowly. We then give a novel picture for the dynamics in the condensed phase. The latter is characterized by an infinite hierarchy of condensates, whose sizes are non-self-averaging and keep fluctuating forever.
description: 29 pages, 13 figures, 3 tables. A few minor changes
title: pierre_poteterie
Creators: name: Pauline VANDENBROUCK
name: Galinand, Cyrille
name: Université Paris1 Panthéon-Sorbonne
Publisher: name: Archeovision
Year: 2022
Subjects: subject: nucleus

description: nucléus
description: 1 fichier 3D (ply), 1 fichier image (jpg)
title: Ionic liquids 2014 and selected papers from ILMAT 2013
title: Highlighting the ever-growing potential of Ionic Liquids
titleType: Subtitle
Creators: name: Vioux, André
name: Taubert, Andreas
Publisher: name: Universität Potsdam
Year: 2020
Subjects: subject: 540 Chemie und zugeordnete Wissenschaften
subject: 570 Biowissenschaften; Biologie

description: Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe; 1055
Tensor mesons produced in tau lepton decays
Creators: name: Castro, G. Lopez
name: Munoz, J. H.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Light tensor mesons (T = a_2, f_2 and K_2^*) can be produced in decays of tau leptons. In this paper we compute the branching ratios of tau --> T pi nu decays by assuming the dominance of intermediate virtual states to model the form factors involved in the relevant hadronic matrix element. The exclusive f_2(1270) pi^- decay mode turns out to have the largest branching ratio, of O(10^-4) . Our results indicate that the contributions of tensor meson intermediate states to the three-pseudoscalar channels of tau decays are rather small.
description: 10 pages, 1 figure. Version accepted for publication in PRD, some typos are corrected and comments are added in section 4. Conclusions remain unchanged
Is spiral modulation really useful?
Creators: name: Chu, Haobing
Publisher: name: University of British Columbia
Year: 2017

description: The performance analysis of modulation techniques has been studied extensively. In this thesis, we investigate the performance of a new modulation technique called spiral modulation. Spiral modulation uses complex spirals in the complex plane to modulate data and form complex signals. Spiral modulation was proposed by Astrapi Corporation and the company claimed that spiral modulation is better than the conventional modulations and can exceed the Shannon limit. In this thesis, we explore the potential of spiral modulation and verify the claims by using MATLAB simulation according to the Astrapi's spiral modulation patents. We first present the system structure and the concept of spiral modulation. Then, we focus on the bit-error rate (BER) performance analysis and the spectral efficiency analysis by using MATLAB simulation. In the BER performance analysis, our simulation results reveal that the BER performance of spiral modulation can be better than some conventional modulations when the constellation size is equal or larger than eight if the bandwidth is not taken into consideration. In the spectral efficiency analysis, we estimate the bandwidth of spiral modulation signals by using the periodogram method. The results show that the bandwidth of spiral modulation signal is not strictly limited. A spectral efficiency plane is plotted, and it shows that the spectral efficiency of spiral modulation is worse than the conventional modulation techniques. We conclude that, contrary to the claim made by Astrapi, the spiral modulation can not exceed Shannon capacity boundary on the spectral efficiency plane.
Probing the tidal disruption flares of massive black holes with high-energy neutrinos
Creators: name: Wang, Xiang-Yu
name: Liu, Ruo-Yu
name: Dai, Zi-Gao
name: Cheng, K. S.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The recently discovered high-energy transient Swift J164449.3+573451 (Sw J1644+57) is thought to arise from the tidal disruption of a passing star by a dormant massive black hole. Modeling of the broadband emission suggests the presence of a powerful relativistic jet, which contributes dominantly to the observed X-ray emission. Here we suggest that protons can be accelerated to ultra-high energies by internal shocks occurring in the jets, but their flux is insufficient to account for the observed flux of ultra-high energy cosmic rays. High energy protons can produce ~0.1-10 PeV neutrinos through photomeson interactions with X-ray photons. The large X-ray fluence (7x10^-4 erg cm^-2) and high photopion efficiency, together with the insignificant cooling of secondary mesons, result in bright neutrino emission expected from Sw J1644+57 if the jet composition is matter-dominated. One to several neutrinos may be detected by a Km^3-scale detector from one tidal disruption event similar to Sw J1644+57, thereby providing a powerful probe of the composition of the jets.
description: 5 pages, 2 figures, accepted for publication as a Rapid Communication in Physical Review D, abstract slightly extended
Undersampled differential phase shift on-off keying for optical camera communications with phase error detection
Creators: name: Liu, Niu
Publisher: name: University of British Columbia
Year: 2017

description: This thesis introduces the design and implementation of an optical camera communication (OCC) system. Phase uncertainty and phase slipping caused by camera sampling are the two major challenges for OCC. In this thesis, we propose a novel modulation scheme to overcome these problems. The undersampled differential phase shift on-off keying is capable of encoding binary data bits without exhibiting any flicker to human eyes. The phase difference between two consecutive samples conveys one-bit information which can be decoded by a low frame rate camera receiver. Error detection techniques are also introduced in the thesis to enhance the reliability of the system. Furthermore, we present the hardware and software design of the proposed system. This low-cost communication system has been implemented with a Xilinx FPGA and a Logitech commercial camera. Experimental results demonstrate that a bit-error rate of 10-⁵ can be achieved with 7.15 microwatts received signal power over a link distance of 15 centimeters.
Potentiale der Schallemissionsanalyse zur Charakterisierung von trockenlaufenden Friktionssystemen. Potentials of acoustic emission analysis for characterization of dry running friction systems
Creators: name: Kelemen, Simon Gábor
Publisher: name: Karlsruhe
Year: 2012

description: Körperschallanalysen von tribologischen Systemen bieten große technische und ökonomische Potentiale. Sie hat das Potential, andere meist aufwendigere und teurere Online-Verfahren zu ergänzen oder gar zu ersetzen. Diese Arbeit beschäftigt sich mit der Applikation der Körperschallemissionsanalyse im Ultraschallbereich an tribologischen Systemen, insbesondere an der aus Sicht der industriellen Anwendung bedeutenden Analyse von organischen Reibbelägen.
CFD-Simulationen turbulenter konvektiver Strömungen bei überkritischen Drücken
Creators: name: Kunik, Claus
Publisher: name: Karlsruhe
Year: 2012
Subjects: Kerntechnik
überkritische Drücke
RANS
LES

description: Fluide bei Drücken um den thermodynamisch kritischen Punkt unterliegen starken Änderungen der Stoffeigenschaften. Diese interagieren mit der Turbulenzproduktion in direkter Wandnähe, was lokal zu einer Verschlechterung des Wärmeübergangs führen kann. Ziel dieser Untersuchung ist die Entwicklung einer an überkritische Druckbedingungen angepassten numerischen Methode, welche auf der Approximation für niedrige Mach-Zahlen und der Kopplung des temperaturabhängigen Gleichungssystems beruht.
title: HiN : Alexander von Humboldt im Netz
Creators: name: Tylus, Piotr
name: Böttcher, Hendrik
name: Ette, Ottmar
name: Krumpel, Heinz
name: Seemann, Jörn
name: Stottmeister, Ulrich Karl Bernd
name: Fiedler, Horst
Publisher: name: Universitätsverlag Potsdam
Year: 2020
Subjects: subject: 509 Histor., geogr., personenbezogene Behandlung
subject: 911 Historische Geografie

description: -Piotr Tylus: Considérations sur l’atmosphère des tropiques … – un mémoire inédit d’Alexander von Humboldt -Hendrik Böttcher: Humboldts Eskorte. Kontrolle und Sicherheit auf Alexander von Humboldts Russlandreise 1829 -Ottmar Ette: Die Listen Alexander von Humboldts. Zur Epistemologie einer Wissenschaftspraxis -Heinz Krumpel: Erinnerungen an Dr. Antonio Michaeler Trampedeller – Ein Humboldtianer in Kolumbien -Jörn Seemann: Alexander von Humboldt’s Search for the Casiquiare Canal: Movements, Measurements, Maps -Ulrich Karl Bernd Stottmeister: Alexander von Humboldt zur „Weberei der Alten“: „Ich habe die Entdekkung gemacht …!“ Zeit- und technikgeschichtliche Betrachtungen über sein verschollenes Manuskript -Horst Fiedler: Alexander von Humboldt und Georg Forster (mit einer Vorbemerkung von Ingo Schwarz)
description: HiN : Alexander von Humboldt im Netz ; International Review for Humboldtian Studies; XXI. 2020, 41
title: nucleus_eclats_levalloise_recurrent
Creators: name: Pauline VANDENBROUCK
name: Galinand, Cyrille
name: Université Paris1 Panthéon-Sorbonne
Publisher: name: Archeovision
Year: 2022
Subjects: subject: éclat
subject: débitage Levallois
subject: nucleus

description: éclat
description: 1 fichier 3D (ply), 10 fichiers image (jpg)
A note about a partial no-go theorem for quantum PCP
Creators: name: Arad, Itai
Publisher: name: arXiv
Year: 2010
Subjects: subject: Computational Complexity (cs.CC)
subject: Quantum Physics (quant-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: This is not a disproof of the quantum PCP conjecture! In this note we use perturbation on the commuting Hamiltonian problem on a graph, based on results by Bravyi and Vyalyi, to provide a partial no-go theorem for quantum PCP. Specifically, we derive an upper bound on how large the promise gap can be for the quantum PCP still to hold, as a function of the non-commuteness of the system. As the system becomes more and more commuting, the maximal promise gap shrinks. We view these results as possibly a preliminary step towards disproving the quantum PCP conjecture. A different way to view these results is actually as indications that a critical point exists, beyond which quantum PCP indeed holds; in any case, we hope that these results will lead to progress on this important open problem.
description: 7 pages, comments are welcome! revised version with very minor corrections
Efficiency Improvement of a Constant Pressure System using an Intermediate Pressure Line
Creators: name: Dengler, Peter
name: Geimer, Marcus
name: Baum, Heiko
name: Schuster, Gerhard
name: Wessing, Christoph
Publisher: name: Karlsruhe
Year: 2012

description: The paper introduces a new hydraulic system based on a constant pressure system with the aim to increase the efficiency of actuation of hydraulic cylinders in mobile machines. Using a third pressure level located between high pressure and tank pressure called intermediate pressure the system enables additional pressure potentials from high pressure to intermediate pressure and from intermediate pressure to tank pressure. This reduces throttle losses at hydraulic cylinders when driven at low or medium loads. An accumulator connected to the intermediate pressure line is being charged or discharged in function of which pressure potential is currently used. Using the example of a typical duty cycle of a wheel loader the paper describes how the accumulator can be applied in order to reach best efficiency results for the new system and it reveals a theoretical efficiency improvement of 20% compared to a conventional Load Sensing system. Furthermore it proposes an online control strategy using Model Predictive Control with an optimization algorithm created with the Dynamic Programming method.
Interpretation of HINODE SOT/SP asymmetric Stokes profiles observed in quiet Sun network and internetwork
Creators: name: Viticchié, B.
name: J.
name: Almeida, Sánchez
name: Del Moro, D.
name: Berrilli, F.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present the first interpretation of the Stokes profile asymmetries measured in the FeI 630 nm lines by SOT/SP, in both quiet Sun internetwork (IN) and network regions. The inversion is carried out under the hypothesis of MISMA, where the unresolved structure is assumed to be optically thin. We analyze a 29.52"x31.70" subfield carefully selected to be representative of the properties of a 302"x162" quiet Sun field-of-view at disk center. The inversion code is able to reproduce the observed asymmetries in a very satisfactory way. The inversion code interprets 25% of inverted profiles as emerging from pixels in which both positive and negative polarities coexist. kG field strengths are found at the base of the photosphere in both network and IN; in the case of the latter, both kG fields and hG fields are admixed. When considering the magnetic properties at the mid photosphere most kG fields are gone, and the statistics is dominated by hG fields. We constrain the magnetic field of only 4.5% of the analyzed photosphere (and this percentage reduces to 1.3% when referred to all pixels, including those with low polarization not analyzed). The rest of the plasma is consistent with the presence of weak fields not contributing to the detected polarization signals. The average flux densities derived in the full subfield and in IN regions are higher than the ones derived from the same dataset by Milne-Eddington inversion. The existence of large asymmetries in SOT/SP polarization profiles is uncovered. These are not negligible in quiet Sun data. The MISMA inversion code reproduces them in a satisfactory way, and provides a statistical description of the magnetized IN and network which partly differs and complements the results obtained so far. From this it follows the importance of having a complete interpretation of the line profile shapes.
description: 11 pages, 9 figures, 1 table - Accepted for publication on A&A
The Evolved Organ Project
Creators: name: Armour, Maria
Publisher: name: QUBES Educational Resources
Year: 2025

description: This project was designed as a week-long activity in a 200-level Anatomy and Physiology course or a semester-long activity in a non-majors' Human Biology course. The Evolved Organ Project integrates students' newly gained knowledge of the human body, their personal creativity, and Generative Artificial Intelligence. Students are asked to choose an organ found in the human body and hypothesize how that organ may evolve over the next 10,000 years, factoring in potential environmental and societal changes.

Students are then assigned a Project Form and a Video Presentation to showcase their results to the class, where they are required to describe the current organ’s structure and function, create their own version of the evolved organ using any medium other than AI, and use prompt words for AI to generate a version of their evolved organ. The Project Form asks students to describe their evolved organ’s structure and function.

In their final video presentations, which should be shared with their class, students are instructed to show both human-created and AI-generated versions of their organ and talk about the functionality of both versions in the human body based on the resulting structures. Students who apply themselves to this project often find it to be a beneficial assignment that offers exposure to the possibilities of using AI in the classroom.

Specific objectives and goals
1. Student will integrate Artificial Intelligence and their own creativity to build how their predicted organ will evolve.
2. Through the integration of generative artificial intelligence (GAI), students will acquire an applicable, in-depth understanding of two core principals in biology: evolutionary mechanisms and the relationship between anatomical structure and physiological function.
3. To develop a higher level of critical thinking skills, students will analyze and evaluate two organs, one that is human-produced and the other generated with AI.
4. This assignment will expose students to the value of using AI in the science and medicine.
title: lame
Creators: name: Pauline VANDENBROUCK
name: Galinand, Cyrille
name: Université Paris1 Panthéon-Sorbonne
Publisher: name: Archeovision
Year: 2022
Subjects: subject: lame
subject: silex

description: lame silex
description: 1 fichier 3D (ply), 1 fichier image (jpg)
title: lithique
Creators: name: Pauline VANDENBROUCK
name: Galinand, Cyrille
name: Université Paris1 Panthéon-Sorbonne
Publisher: name: Archeovision
Year: 2022
Subjects: subject: trace d'utilisation
subject: lithique

description: litihique
description: 1 fichier 3D (ply), 1 fichier image (jpg)
The VLT-FLAMES Tarantula Survey I: Introduction and observational overview
Creators: name: Evans, C. J.
name: Taylor, W. D.
name: Henault-Brunet, V.
name: Sana, H.
name: de Koter, A.
name: Simon-Diaz, S.
name: Carraro, G.
name: Bagnoli, T.
name: Bastian, N.
name: Bestenlehner, J. M.
name: Bonanos, A. Z.
name: Bressert, E.
name: Brott, I.
name: Campbell, M. A.
name: Cantiello, M.
name: Clark, J. S.
name: Costa, E.
name: Crowther, P. A.
name: de Mink, S. E.
name: Doran, E.
name: Dufton, P. L.
name: Dunstall, P. R.
name: Friedrich, K.
name: Garcia, M.
name: Gieles, M.
name: Graefener, G.
name: Herrero, A.
name: Howarth, I. D.
name: Izzard, R. G.
name: Langer, N.
name: Lennon, D. J.
name: Apellaniz, J. Maiz
name: Markova, N.
name: Najarro, F.
name: Puls, J.
name: Ramirez, O. H.
name: Sabin-Sanjulian, C.
name: Smartt, S. J.
name: Stroud, V. E.
name: van Loon, J. Th.
name: Vink, J. S.
name: Walborn, N. R.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The VLT-FLAMES Tarantula Survey (VFTS) is an ESO Large Programme that has obtained multi-epoch optical spectroscopy of over 800 massive stars in the 30 Doradus region of the Large Magellanic Cloud (LMC). Here we introduce our scientific motivations and give an overview of the survey targets, including optical and near-infrared photometry and comprehensive details of the data reduction. One of the principal objectives was to detect massive binary systems via variations in their radial velocities, thus shaping the multi-epoch observing strategy. Spectral classifications are given for the massive emission-line stars observed by the survey, including the discovery of a new Wolf-Rayet star (VFTS 682, classified as WN5h), 2' to the northeast of R136. To illustrate the diversity of objects encompassed by the survey, we investigate the spectral properties of sixteen targets identified by Gruendl & Chu from Spitzer photometry as candidate young stellar objects or stars with notable mid-infrared excesses. Detailed spectral classification and quantitative analysis of the O- and B-type stars in the VFTS sample, paying particular attention to the effects of rotational mixing and binarity, will be presented in a series of future articles to address fundamental questions in both stellar and cluster evolution.
description: Accepted by A&A, 52 pages (main body: 19 pages, supplementary tables: 33 pages), v3: two classifications updated to match a parallel paper
The high energy neutrino cross-section in the Standard Model and its uncertainty
Creators: name: Cooper-Sarkar, Amanda
name: Mertsch, Philipp
name: Sarkar, Subir
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Updated predictions are presented for high energy neutrino and antineutrino charged and neutral current cross-sections within the conventional DGLAP formalism of NLO QCD using modern PDF fits. PDF uncertainties from model assumptions and parametrization bias are considered in addition to the experimental uncertainties. Particular attention is paid to assumptions and biases which could signal the need for extension of the conventional formalism to include effects such as ln(1/x) resummation or non-linear effects of high gluon density.
description: 15 pages, 13 figures, 2 tables (REVTeX4); clarifying comments and link to tabulated cross sections at http://www-pnp.physics.ox.ac.uk/~cooper/neutrino/ added; to appear in JHEP
title: hache_polie
Creators: name: Théa Poullain
name: Galinand, Cyrille
name: Université Paris1 Panthéon-Sorbonne
Publisher: name: Archeovision
Year: 2022
Subjects: subject: hache polie

description: hache polie
description: 1 fichier 3D (ply), 1 fichier image (jpg)
Lie crossed modules and gauge-invariant actions for 2-BF theories
Creators: name: Martins, Joao Faria
name: Mikovic, Aleksandar
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We generalize the BF theory action to the case of a general Lie crossed module $(H \to G)$, where $G$ and $H$ are non-abelian Lie groups. Our construction requires the existence of $G$-invariant non-degenerate bilinear forms on the Lie algebras of $G$ and $H$ and we show that there are many examples of such Lie crossed modules by using the construction of crossed modules provided by short chain complexes of vector spaces. We also generalize this construction to an arbitrary chain complex of vector spaces, of finite type. We construct two gauge-invariant actions for 2-flat and fake-flat 2-connections with auxiliary fields. The first action is of the same type as the BFCG action introduced by Girelli, Pfeiffer and Popescu for a special class of Lie crossed modules, where $H$ is abelian. The second action is an extended BFCG action which contains an additional auxiliary field. However, these two actions are related by a field redefinition. We also construct a three-parameter deformation of the extended BFCG action, which we believe to be relevant for the construction of non-trivial invariants of knotted surfaces embedded in the four-sphere.
description: 22 pages. A three-parameter deformation of the extended BFCG action is included. Minor corrections
Efficiency Optimization of a Hydrostatic System Using an Intermediate Pressure Line
Creators: name: Dengler, Peter
name: Dombrowski, René Von
Publisher: name: Karlsruhe
Year: 2012

description: The paper introduces a new hydraulic system based on a constant pressure system with the aim to increase the efficiency of actuation of hydraulic cylinders in mobile machines. Using a third pressure level located between high pressure and tank pressure called intermediate pressure the system enables additional pressure potentials from high pressure to intermediate pressure and from intermediate pressure to tank pressure. This reduces throttle losses at hydraulic cylinders when driven at low or medium loads. An accumulator connected to the intermediate pressure line is being charged or discharged in function of which pressure potential is currently used. Using the example of a typical duty cycle of a wheel loader the paper describes how the accumulator can be applied in order to reach best efficiency results for the new system. A simulation shows that the demand of hydraulic energy of the new system is 13% lower than of a conventional Load Sensing system.
title: CHAPITEAU_TETE_CHIEN
Creators: name: Théa Poullain
name: Galinand, Cyrille
name: Université Paris1 Panthéon-Sorbonne
Publisher: name: Archeovision
Year: 2022
Subjects: subject: chapiteau
subject: chien

description: chapiteau
description: 1 fichier 3D (ply), 2 fichiers image (jpg)
Menschzentrierte Modellierung von Produktentstehungssystemen unter besonderer Berücksichtigung der Synthese und Analyse dynamischer Zielsysteme
Creators: name: Lohmeyer, Quentin
Publisher: name: Karlsruhe
Year: 2013
Subjects: Produktentwicklung
Systemtechnik
Menschzentrierung
Unsicherheit
Iteration

description: In dieser Arbeit wird mit dem erweiterten ZHO-Modell ein menschzentriertes Erklärungsmodell entwickelt, das den Entwickler als denkenden und handelnden Menschen im Mittelpunkt eines unsicherheitsbehafteten und iterativ verlaufenden Produktentstehungsprozesses beschreibt.
Entwicklung eines Smoothed Particle Hydrodynamics (SPH) Codes zur numerischen Vorhersage des Primärzerfalls an Brennstoffeinspritzdüsen
Creators: name: Höfler, Corina
Publisher: name: Karlsruhe
Year: 2013
Subjects: Smoothed Particle Hydrodynamics
Primärzerfall
Zweiphasenströmung
Zerstäubung
Flugtriebwerk

description: Aufgrund der strengen Schadstoffemissionsrestriktionen zukünftiger Triebwerke bedarf es der Entwicklung effizienter Triebwerkskonzepte. Eine Optimierung des Zerstäubersystems ist unerlässlich. Daher ist es wünschenswert, den Primärzerfall bei der Kraftstoffaufbereitung numerisch vorhersagen zu können. In diesem Forschungsbericht wird systematisch untersucht, ob und inwiefern die gitterfreie Lagrange'sche Smoothed Particle Hydrodynamics Methode in diesem Kontext anwendbar ist.