cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Trust Management Model for Cloud Computing Environment
Creators: name: Prajapati, Somesh Kumar
name: Changder, Suvamoy
name: Sarkar, Anirban
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: Software as a service or (SaaS) is a new software development and deployment paradigm over the cloud and offers Information Technology services dynamically as "on-demand" basis over the internet. Trust is one of the fundamental security concepts on storing and delivering such services. In general, trust factors are integrated into such existent security frameworks in order to add a security level to entities collaborations through the trust relationship. However, deploying trust factor in the secured cloud environment are more complex engineering task due to the existence of heterogeneous types of service providers and consumers. In this paper, a formal trust management model has been introduced to manage the trust and its properties for SaaS in cloud computing environment. The model is capable to represent the direct trust, recommended trust, reputation etc. formally. For the analysis of the trust properties in the cloud environment, the proposed approach estimates the trust value and uncertainty of each peer by computing decay function, number of positive interactions, reputation factor and satisfaction level for the collected information.
description: 5 Pages, 2 Figures, Conference
Kultivierung von humanen Nabelschnurzellen unter dynamischen Bedingungen im Bioreaktor mit dem Ziel der osteogenen Differenzierung
Creators: name: Marten, Dana Maria
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2010
Subjects: subject: Human umbilical cord-derived cells
subject: Z RP-bioreactors
subject: hypoxia
subject: osteogenic differentiation
subject: Humane umbilikale Zellen
subject: Z RP-Bioreaktoren
subject: Hypoxie
subject: osteogene Differenzierung
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: [no abstract]
Der Digitale Düsseldorfer Spielplan. Der Versuch, vergängliche Theaterkunst multimedial zu dokumentieren
Creators: name: Schild, Margret
Publisher: name: AKMB-news: Informationen zu Kunst, Museum und Bibliothek
Year: 2016

description: AKMB-news: Informationen zu Kunst, Museum und Bibliothek, Bd. 21, Nr. 2 (2015): AKMB-news
Das "Sehende Skalpell" : OCT-navigierte fs-Laser Mikrochirurgie
Creators: name: Massow, Ole
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2010
Subjects: subject: Seeing scalpel
subject: femtosecondlaser
subject: optical coherence tomography
subject: spectral broadening
subject: non-solitonic radiation
subject: Sehendes Skalpell
subject: Femtosekundenlaser
subject: optische Kohärenztomographie
subject: spektrale Verbreiterung
subject: nichtsolitonische Strahlung
subject: Dewey Decimal Classification::600 | Technik::610 | Medizin, Gesundheit

description: [no abstract]
Nitrogen and argon doping of niobium for superconducting radio frequency cavities: a pathway to highly efficient accelerating structures
Creators: name: Grassellino, A.
name: Romanenko, A.
name: Melnychuk, O.
name: Trenikhina, Y.
name: Crawford, A.
name: Rowe, A.
name: Wong, M.
name: Sergatskov, D.
name: Khabiboulline, T.
name: Barkov, F.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: We report a surface treatment that systematically improves the quality factor of niobium radio frequency cavities beyond the expected limit for niobium. A combination of annealing in a partial pressure of nitrogen or argon gas and subsequent electropolishing of the niobium cavity surface leads to unprecedented low values of the microwave surface resistance, and an improvement in the efficiency of the accelerating structures up to a factor of 3, reducing the cryogenic load of superconducting cavities for both pulsed and continuous duty cycles. The field dependence of the surface resistance is reversed compared to standardly treated niobium.
Optimierung der Dirhodium-Methode
Creators: name: Mattiza, Jens Torsten
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2010
Subjects: subject: Chiral dirhodium tetracarboxylate complexes
subject: enantiodifferentation
subject: magnetic anisotropy effects
subject: thioether
subject: sulfoxides
subject: ethers
subject: esters
subject: epoxides
subject: amides
subject: carbonates
subject: adamantanes
subject: absolute configuration
subject: Komplexierungsuntersuchungen von Ethern
subject: Thioethern
subject: Sulfoxiden
subject: Sulfonen
subject: Selektivitätsstudien von Rh*
subject: Nanosonden im anisotropen Feld von Rh*
subject: Optimierung des NMR-Auxiliars für die Enantiomerendifferenzierung
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: [no abstract]
title: Archäologischer Anzeiger, 1. Halbband 2023
title: 1. Halbband 2023
titleType: AlternativeTitle
Creators: name: Archäologischer Anzeiger
Publisher: name: Archäologischer Anzeiger
Year: 2023

description: Coverbild: Archive of the Archaeological Museum of Thessaloniki (Ο. Κοurakis) © Archaeological Museum of Thessaloniki, Hellenic Ministry of Culture & Sports – Hellenic Organization of Cultural Resources Development Die Druckausgabe ist erhältlich über https://reichert-verlag.de
description: Der Tempel des Apollo in circo in Rom und seine Bauherren...1–29 (§) The Non-athletic Ideal Die Ausgrabungen in Boğazköy-Ḫattuša 2022...1–210 (§) Architekturforschungen in Didyma II...1–110 (§) The Sculptures of the Archaeological Museum of Thessaloniki...1–100 (§) Eine verbrannte Statue des Odysseus...1–14 (§) The Hidden Cityscape of Vulci...1–68 (§) Zum Ares Borghese...1–31 (§) Zur Chronologie des antiken Thera...1–68 (§) Metallfunde aus den neuen Ausgrabungen des DAI in Olympia (2006–2017)...1–55 (§) Eros and Psyche...1–12 (§)
In vitro und in vivo Expressionsprofile von Zytokinen nach Infektion mit dem Virus der Klassischen Schweinepest
Creators: name: Lange, Anastasia
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2010
Subjects: subject: Classical swine fever
subject: gene expression analysis
subject: cytokines
subject: Klassische Schweinepest
subject: Genexpressionsanalyse
subject: mRNA
subject: Zytokine
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie

description: [no abstract]
Der Tempel des Apollo in circo in Rom und seine Bauherren
Creators: name: Hölscher, Tonio
Publisher: name: Archäologischer Anzeiger
Year: 2023

description: Der Neubau des Apollo-Tempels in circo in den Jahren um 30 v. Chr. ist archäologisch intensiv untersucht worden, dagegen ist die historische Zuordnung des Baues und seiner Bauphasen an bestimmte Bauherren noch nicht überzeugend geklärt. Der folgende Beitrag geht von der allgemeinen Baupraxis der Republik und der Baupolitik Octavians zu Beginn des Principats aus. Nach traditioneller Praxis muss der Neubau des Tempels zunächst von Octavian übernommen und begonnen worden sein. Nach dem Sieg bei Actium übertrug er, mit seiner neuen Strategie der Integration, die Fortsetzung und Fertigstellung an C. Sosius, der nach seinem Übertritt von Antonius zu Octavian die universelle Zustimmung zu dem neuen Machthaber bezeugen konnte. Die zwei Phasen der Fundamente lassen erkennen, dass Octavian zunächst einen Bau von programmatischer Schlichtheit geplant hatte, während Sosius den Tempel in einer ungleich reicheren Form zum Ruhm des Octavian-Augustus vollendete.
description: Archäologischer Anzeiger, 1. Halbband 2023
Verbascum lychnitis
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: V. Lychnitis X thapsiforme - 3: Saxon (Paiche).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
The Effects of radial inflow of gas and galactic fountains on the chemical evolution of M31
Creators: name: Spitoni, E.
name: Matteucci, F.
name: Marcon-Uchida, M. M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Galactic fountains and radial gas flows are very important ingredients in modeling the chemical evolution of galactic disks. Our aim here is to study the effects of galactic fountains and radial gas flows in the chemical evolution of the disk of M31. We adopt a ballistic method to study the effects of galactic fountains on the chemical enrichment of the M31 disk. We find that the landing coordinate for the fountains in M31 is no more than 1 kpc from the starting point, thus producing negligible effect on the chemical evolution of the disk. We find that the delay time in the enrichment process due to fountains is no longer than 100 Myr and this timescale also produces negligible effects on the results. Then, we compute the chemical evolution of the M31 disk with radial gas flows produced by the infall of extragalactic material and fountains. We find that a moderate inside-out formation of the disk coupled with radial flows of variable speed can very well reproduce the observed gradient. We discuss also the effects of other parameters such a threshold in the gas density for star formation and an efficiency of star formation varying with the galactic radius. We conclude that the most important physical processes in creating disk gradients are the inside-out formation and the radial gas flows. More data on abundance gradients both locally and at high redshift are necessary to confirm this conclusion.
description: Accepted by A&A
Die Verehrung des Heiligen Stephanus
Creators: name: Grom, Erwin
Publisher: name: Unser Münster / Die Informationsschrift des Münsterbauvereins Breisach e.V.
Year: 2016

description: Unser Münster / Die Informationsschrift des Münsterbauvereins Breisach e.V., Nr. 53 (2016): Unser Münster: Sankt Stephan
Derived Representation Schemes and Noncommutative Geometry
Creators: name: Berest, Yuri
name: Felder, Giovanni
name: Ramadoss, Ajay
Publisher: name: arXiv
Year: 2013
Subjects: subject: K-Theory and Homology (math.KT)
subject: FOS: Mathematics

description: Some 15 years ago M. Kontsevich and A. Rosenberg [KR] proposed a heuristic principle according to which the family of schemes ${Rep_n(A)}$ parametrizing the finite-dimensional represen- tations of a noncommutative algebra A should be thought of as a substitute or "approximation" for Spec(A). The idea is that every property or noncommutative geometric structure on A should induce a corresponding geometric property or structure on $Rep_n(A)$ for all n. In recent years, many interesting structures in noncommutative geometry have originated from this idea. In practice, however, if an associative algebra A possesses a property of geometric nature (e.g., A is a NC complete intersection, Cohen-Macaulay, Calabi-Yau, etc.), it often happens that, for some n, the scheme $Rep_n(A)$ fails to have the corresponding property in the usual algebro-geometric sense. The reason for this seems to be that the representation functor $Rep_n$ is not "exact" and should be replaced by its derived functor $DRep_n$ (in the sense of non-abelian homological algebra). The higher homology of $DRep_n(A)$, which we call representation homology, obstructs $Rep_n(A)$ from having the desired property and thus measures the failure of the Kontsevich-Rosenberg "approximation." In this paper, which is mostly a survey, we prove several results confirming this intuition. We also give a number of examples and explicit computations illustrating the theory developed in [BKR] and [BR].
description: 39 pages. Comments welcome. arXiv admin note: substantial text overlap with arXiv:1112.1449
Totalsynthese und Strukturaufklärung von Noricumazol A, B und Derivaten
Creators: name: Barbier, Jenny
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2012
Subjects: subject: total synthesis
subject: structure elucidation
subject: noricumazole
subject: zinc-mediated addition
subject: ion channel inhibition
subject: hepatitis C virus
subject: Totalsynthese
subject: Strukturaufklärung
subject: Noricumazol
subject: ortho-Lithiierung
subject: Zink-vermittelte Addition
subject: Ionenkanal-Inhibierung
subject: Hepatitis-C-Virus
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: [no abstract]
Ausgrabungen in Boğazköy-Ḫattuša 2022
Creators: name: Schachner, Andreas
Publisher: name: Archäologischer Anzeiger
Year: 2023

description: Die Kampagne 2022 markiert einen Übergang zu neuen Bereichen der Erforschung von Boğazköy. Einerseits konnten die Ausgrabungen in der nördlichen Unterstadt in den bronzezeitlichen Zusammenhängen weitestgehend abgeschlossen werden (Beitrag A. Schachner). Das gleiche gilt für die nördlichen Befestigungsanlage des römischen Militärlagers (Beitrag D. Krüger). Andererseits wurden neue Forschungsfragen mit Ausgrabungen auf dem mittleren Büyükkale-Nordwesthang (Beitrag A. Schachner), der Büyükkale (Beitrag J. Becker – A. Schachner) und dem Westhang der Oberstadt (Beitrag M. Gruber) in Angriff genommen. Eine unerwartete Überraschung war die Entdeckung von Inschriften anatolischer Hieroglyphen, die auf die Wände der Poterne unter Yerkapı gemalt waren (Beitrag L. Repola – M. Marazzi – N. Bolatti Guzzo – M. Alparslan – A. Schachner – B. Genç). Die Restaurierungsmaßnahmen konzentrierten sich auf den Abschluss der Arbeiten am südlichen Tor der Abschnittsmauer, die Wohnbebauung in der Unterstadt, die Pithoi in den nordwestlichen Depots des Großen Tempels und auf das Gebäude E auf Büyükkale.
description: Archäologischer Anzeiger, 1. Halbband 2023
Glockenstuhlsanierung
Creators: name: Hau, Martin
Publisher: name: Unser Münster / Die Informationsschrift des Münsterbauvereins Breisach e.V.
Year: 2016

description: Unser Münster / Die Informationsschrift des Münsterbauvereins Breisach e.V., Nr. 53 (2016): Unser Münster: Sankt Stephan
Identifizierung und Charakterisierung neuer an der Filopodienbildung beteiligter Proteine aus Dictyostelium discoideum
Creators: name: Linkner, Jörn
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2010
Subjects: subject: Actin
subject: Scar/WAVE-Complex
subject: filopodia
subject: lamellipodia
subject: cell-migration
subject: Aktin
subject: Scar/WAVE-Komplex
subject: Ena/VASP
subject: Filopodien
subject: Lamellipodien
subject: Zellmigration
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: [no abstract]
Further historical studies based on X-ray diffraction methods of the reagents employed in making opal and opaque glasses
Creators: name: Turner, W. E. S.
name: Rooksby, H. P.
Publisher: name: Verlag des Römisch-Germanischen Zentralmuseums Mainz
Year: 2016
Subjects: Glas; Technologie; Röntgendiffraktometrie; Materialkunde

description: [nicht vorhanden / not available]
description: Jahrbuch des Römisch-Germanischen Zentralmuseums Mainz, Bd. 8 (1961)
Architekturforschungen in Didyma II
Creators: name: Haselberger, Lothar
name: Koenigsaecker, Elea
name: Prignitz, Sebastian
Publisher: name: Archäologischer Anzeiger
Year: 2023

description: Die unfertig stehende Säule des Apollontempels von Didyma und ihr »so phantastisches flaschenfömiges« Schaftprofil (Knackfuß, 1941) bilden den Kernpunkt dieser Studie. Fast 20 m hoch zog die Säule durch die antiken Durchmesser-Notationen ihrer Trommeln bereits Ende des 19. Jhs. wissenschaftliche Aufmerksamkeit an. Ihr befremdlich konkaves Schaftprofil ließ es allerdings zunehmend zweifelhaft erscheinen, ob sie sich überhaupt in korrekter Form hätte fertigstellen lassen. Tatsächlich bestätigt die neue Dokumentation der Schaftdurchmesser wie auch der bis auf 1/32 Fuß genauen Durchmesserangaben, dass die Säule nicht einmal mit geradlinigem Schaftumriss fertigzustellen gewesen wäre – nicht zu reden von der Schwellung einer ›Entasis‹, deren Werkplanung uns ein ingeniöser Bauriss dieses Tempels überliefert. Die Säule steht nun als Dokument eines bereits in der Planung fehlgegangenen Bauprojekts der didymeischen Tempelbauhütte. Fast ein ganzer jährlicher Bauetat von umgerechnet knapp 4 Millionen Euro wurde vor aller Augen verschleudert. Der Grund für diese Fehlplanung bleibt unerklärlich.
description: Archäologischer Anzeiger, 1. Halbband 2023
Investigating $β$-decay properties of spherical nuclei along the possible r-process path
Creators: name: Fang, Dong-Liang
name: Brown, B. Alex
name: Suzuki, Toshio
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The spherical QRPA method is used for the calculations of the $β$-decay properties of the neutron-rich nuclei in the region near the neutron magic numbers N=82 and N=126 which are important for determination of the r-process path. Our calculations differ from previous works by the use of realistic forces for the proton-neutron interaction. Both the allowed and first-forbidden $β$-decays are included. Detailed comparisons with the experimental measurements and the previous shell-model calculations are performed. The results for half-lives and beta-delayed neutron emission probabilities will serve as input for the r-process nucleosynthesis simulations.
description: 10 pages, 12 figures
Adaptive Minimum BER Reduced-Rank Interference Suppression Algorithms Based on Joint and Iterative Optimization of Parameters
Creators: name: Cai, Yunlong
name: de Lamare, Rodrigo C.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: In this letter, we propose a novel adaptive reduced-rank strategy based on joint iterative optimization (JIO) of filters according to the minimization of the bit error rate (BER) cost function. The proposed optimization technique adjusts the weights of a subspace projection matrix and a reduced-rank filter jointly. We develop stochastic gradient (SG) algorithms for their adaptive implementation and introduce a novel automatic rank selection method based on the BER criterion. Simulation results for direct-sequence code-division-multiple-access (DS-CDMA) systems show that the proposed adaptive algorithms significantly outperform the existing schemes.
description: 3 figures
A Rational and Efficient Algorithm for View Revision in Databases
Creators: name: Delhibabu, Radhakrishnan
name: Lakemeyer, Gerhard
Publisher: name: arXiv
Year: 2013
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Artificial Intelligence (cs.AI)
subject: Databases (cs.DB)
subject: FOS: Computer and information sciences

description: The dynamics of belief and knowledge is one of the major components of any autonomous system that should be able to incorporate new pieces of information. In this paper, we argue that to apply rationality result of belief dynamics theory to various practical problems, it should be generalized in two respects: first of all, it should allow a certain part of belief to be declared as immutable; and second, the belief state need not be deductively closed. Such a generalization of belief dynamics, referred to as base dynamics, is presented, along with the concept of a generalized revision algorithm for Horn knowledge bases. We show that Horn knowledge base dynamics has interesting connection with kernel change and abduction. Finally, we also show that both variants are rational in the sense that they satisfy certain rationality postulates stemming from philosophical works on belief dynamics.
Agonisierung des PAC1-Rezeptors vermittelt antiinflammatorische Effekte in murinen Modellen für allergisches Asthma
Creators: name: Lauenstein, Hans-Dieter
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2010
Subjects: subject: Pituitary adenylate cyclase activating polypeptide receptor 1
subject: Allergie
subject: Neuropeptide
subject: Allergy
subject: FOS: Clinical medicine
subject: neuropeptides
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie

description: [no abstract]
Quality-Aware Coding and Relaying for 60 GHz Real-Time Wireless Video Broadcasting
Creators: name: Kim, Joongheon
name: Tian, Yafei
name: Mangold, Stefan
name: Molisch, Andreas F.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Wireless streaming of high-definition video is a promising application for 60 GHz links, since multi-Gigabit/s data rates are possible. In particular we consider a sports stadium broadcasting system where video signals from multiple cameras are transmitted to a central location. Due to the high pathloss of 60\,GHz radiation over the large distances encountered in this setting, the use of relays is required. This paper designs a quality-aware coding and relaying algorithm for maximization of the overall video quality. We consider the setting that the source can split its data stream into parallel streams, which can be transmitted via different relays to the destination. For this, we derive the related formulation and re-formulate it as convex programming, which can guarantee optimal solutions.
description: 5 pages, 8 figures, To appear in IEEE International Conference on Communications (ICC), 2013
Neunzehn Textilreste aus dem Dürrnberg in Hallen
Creators: name: Hundt, Hans-Jürgen
Publisher: name: Verlag des Römisch-Germanischen Zentralmuseums Mainz
Year: 2016
Subjects: Eisenzeit; Latènezeit; Mitteleuropa; Österreich; Hallein; Textilien; Salzbergbau

description: [nicht vorhanden / not available]
description: Jahrbuch des Römisch-Germanischen Zentralmuseums Mainz, Bd. 8 (1961)
Sculptures of the Archaeological Museum of Thessaloniki
Creators: name: Stefanidou-Tiveriou, Theodosia
name: Voutiras, Emmanuel
name: Tambakopoulos, Dimitris
name: Maniatis, Yannis
Publisher: name: Archäologischer Anzeiger
Year: 2023

description: This combined archaeometric and archaeological study complements the Catalogue of Sculptures of the Archaeological Museum of Thessaloniki. The systematic archaeometric analysis of 96 sculptures using a combination of optical, isotopic and spectroscopic techniques has shown that in Thessaloniki and in central Macedonia the marbles used in Antiquity for sculpture came predominantly either from quarries in Thasos Island and mainland Macedonia or from quarries in southern Greece, especially Mount Penteli and Paros; marbles from Asia Minor were also occasionally used. Based on these results we investigated the sculptural production of Macedonia from the beginning of the 5th century B.C. to the beginning of the 5th century A.D., taking into account a number of sculptures whose marble could be identified either macroscopically or using the results of earlier analyses. The stylistic analysis suggests that the local workshops could use not only local but also imported marbles. We have also been able to show that ready-made works of sculpture were imported to Macedonia and that immigrant artists produced sculptures using not only imported but also local Macedonian marbles as well as from the island from Thasos.
description: Archäologischer Anzeiger, 1. Halbband 2023
Eine verbrannte Statue des Odysseus
Creators: name: Wrede, Henning
Publisher: name: Archäologischer Anzeiger
Year: 2023

description: Ein Stich und Zeichnungen des 16. und 17. Jahrhunderts sowie eine Bronzestatuette Anticos überliefern eine ergänzte Statue der Uffizien, die 1762 verbrannt ist. Antik war nur der Torso mit Resten von Armen und Beinen. Die Kleidung identifiziert den Dargestellten mit Odysseus. Ikonographisch nahe verwandt sind Statuen des Odysseus in Baiae, Sperlonga und im Vatikanischen Museum, die ihn in den Szenen des Weinreichens und der Blendung mit Polyphem verbinden. Von beiden Möglichkeiten entscheiden die Reste der Arme, die verlorene Statue auf eine Gruppe zurückzuführen, welche die Blendung des Kyklopen wiedergab.
description: Archäologischer Anzeiger, 1. Halbband 2023
Funktion und Pharmakologie des Histamin H1- und H4-Rezeptors in der Maus
Creators: name: Beermann, Silke
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2012
Subjects: subject: Histamine
subject: histamine receptor signalling pathways
subject: Asthma
subject: Histamin
subject: Histaminrezeptor-Signalwege
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: [no abstract]
Ein unvollendetes Mumienporträt
Creators: name: Simon, Erika
Publisher: name: Verlag des Römisch-Germanischen Zentralmuseums Mainz
Year: 2016
Subjects: Römerzeit; Nordafrika; Ägypten; Grabfunde; Sarkophag; Bildliche Darstellungen

description: [nicht vorhanden / not available]
description: Jahrbuch des Römisch-Germanischen Zentralmuseums Mainz, Bd. 9 (1962)
Stochastic Löwner evolution as an approach to conformal field theory
Creators: name: Müller-Lohmann, Annekathrin
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2008
Subjects: subject: Schramm-Löwner evolution
subject: boundary conformal field theory
subject: critical phenomena
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: [no abstract]
Computing with Non-equilibrium Ratchets
Creators: name: Kabir, Mehdi
name: Unluer, Dincer
name: Li, Lijun
name: Ghosh, Avik W.
name: Stan, Mircea R.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Electronic ratchets transduce local spatial asymmetries into directed currents in the absence of a global drain bias, by rectifying temporal signals that reside far from thermal equilibrium. We show that the absence of a drain bias can provide distinct energy advantages for computation, specifically, reducing static dissipation in a logic circuit. Since the ratchet functions as a gate voltage-controlled current source, it also potentially reduces the dynamic dissipation associated with charging/discharging capacitors. In addition, the unique charging mechanism eliminates timing related constraints on logic inputs, in principle allowing for adiabatic charging. We calculate the ratchet currents in classical and quantum limits, and show how a sequence of ratchets can be cascaded to realize universal Boolean logic.
description: Accepted to Transactions on Nanotechnology
Structural constraints on Gondwana breakup along the East African margin
Creators: name: Klimke, Jennifer
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2017
Subjects: subject: Gondwana breakup
subject: Davie Ridge
subject: reflection seismic data
subject: Gondwana-Aufbruch
subject: Davie Rücken
subject: Reflexionsseismik
subject: Dewey Decimal Classification::500 | Naturwissenschaften::550 | Geowissenschaften

description: [no abstract]
Strategies for improved cancer virotherapy : in vivo migration and expansion of dendritic cells enhance cross-presentation of tumor antigens in virotherapy
Creators: name: Ramakrishna, Edukulla
Publisher: name: Hannover : Gottfried Wilhelm Leibniz Universität Hannover
Year: 2008
Subjects: subject: Virotherapy
subject: immune answer
subject: dendritic cell migration
subject: Dewey Decimal Classification::600 | Technik::610 | Medizin, Gesundheit

description: [no abstract]
Vlasov-Poisson simulations of electrostatic parametric instability for localized Langmuir wave packets in the solar wind
Creators: name: Henri, Pierre
name: Califano, Francesco
name: Briand, Carine
name: Mangeney, André
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Plasma Physics (physics.plasm-ph)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: Recent observation of large amplitude Langmuir waveforms during a Type III event in the solar wind have been interpreted as the signature of the electrostatic decay of beam-driven Langmuir waves. This mechanism is thought to be a first step to explain the generation of solar Type III radio emission. The threshold for this parametric instability in typical solar wind condition is investigated here by means of 1D-1V Vlasov-Poisson simulations. We show that the amplitude of the observed Langmuir beat-like waveforms is of the order of the effective threshold computed from the full kinetic simulations. The expected level of associated ion acoustic density fluctuations have also been computed for comparison with observations.
description: 20 pages, 8 figures, accepted for publication in Journal of Geophysical Research (Space Physics)
Hidden Cityscape of Vulci
Creators: name: Pasieka, Paul
name: Franceschini, Mariachiara
name: Ullrich, Burkart
name: Meyer, Jessica
Publisher: name: Archäologischer Anzeiger
Year: 2023

description: For a long time, Etruscan cities, their physical appearance, diachronic evolution and cultural and social figurations have largely been neglected in archaeological research. Only in recent years has this begun to change thanks to the systematic application of new methodological approaches. By using a combination of non-invasive, geophysical prospections and targeted excavations at neuralgic points, the Vulci Cityscape project aims to examine the cityscape of Vulci and its transformation over the longue durée. Geophysical surveys conducted in 2020 on 22.5 ha north of the so-called decumanus resulted in a new and more complete plan of this part of the city, identifying different functional areas, differentiating street systems and revealing the complex historical palimpsest of the urban structure. Among the functional areas, a new sacred district to the west of the tempio grande, including a new monumental, late Archaic temple stands out. Not only do the results improve our knowledge of the urban layout of Vulci, but they also shed new light on Etruscan urbanism in general.
description: Archäologischer Anzeiger, 1. Halbband 2023
The Impact of Surface Chemistry on Photoelectrochemical Device Characteristics
Creators: name: Rosenberg, Robert Alan
Publisher: name: California Institute of Technology
Year: 2011
Subjects: Solar Energy Conversion
Photoelectrochemistry
Methylation
Open-Circuit Voltage
Surface Chemistry
Silicon
Applied Physics

description: Varying degrees of partial methylation are performed on the (111) surface of p-type Si in order to investigate the role of mixed surface functionality on the device’s overall properties.  Current-voltage characteristics are acquired in nonaqueous regenerative photoelectrochemical cells with a variety of one-electron redox species.  P-type and p/n+ electrodes are evaluated, allowing comparisons between devices where the energy barrier is set by the semiconductor-liquid interface and devices where the energy barrier is set by the buried junction with the heavily doped emitter layer.  In contrast to fully methylated or entirely unprotected surfaces, the intermediately methylated devices exhibit mixed monolayers with a disparity in barrier height.  Charge transfer across these interfaces is studied, and effects such as pinch-off are considered in the search for a threshold surface composition for acceptable device performance.
Structural analysis of biological membranes and proteins by atomic force microscopy
Creators: name: Enders, Oliver
Publisher: name: Hannover : Universität
Year: 2004
Subjects: subject: Scanning force microscopy
subject: biological membranes
subject: lipids
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie

description: [no abstract]
Photon statistics in the dynamical Casimir effect modified by a harmonic oscillator detector
Creators: name: Dodonov, A. V.
name: Dodonov, V. V.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: It was predicted some time ago that the cavity dynamical Casimir effect (generation of photons from the initial vacuum state in a cavity with moving walls) might be observed if a boundary vibrates at the double frequency of some selected cavity mode. However, to register the created photons one has to couple the cavity mode with some detector. Considering the harmonic oscillator model of a detector, we analyze how different coupling regimes can affect the statistics of the created quanta.
description: 10 pages, 2 figures, to appear in the Topical Issue of Physica Scripta: Proceedings of CEWQO-2012
Lampenbilder und Terra sigillata
Creators: name: Klumbach, Hans
Publisher: name: Verlag des Römisch-Germanischen Zentralmuseums Mainz
Year: 2016
Subjects: Römerzeit; Mitteleuropa; Lampen; Keramik; Bildliche Darstellungen

description: [nicht vorhanden / not available]
description: Jahrbuch des Römisch-Germanischen Zentralmuseums Mainz, Bd. 8 (1961)
Hindering the formation and promoting the dispersion of medical biofilms: Non-lethal effects of seagrass extracts
Creators: name: De Vincenti, Luca
name: Glasenapp, Yvana
name: Cattò, Cristina
name: Villa, Federica
name: Cappitelli, Francesca
name: Papenbrock, Jutta
Publisher: name: London : BioMed Central Ltd.
Year: 2018
Subjects: subject: Antibiofilm activity
subject: Candida albicans
subject: Escherichia coli
subject: Non-lethal concentrations
subject: Seagrass extracts
subject: Dewey Decimal Classification::600 | Technik::610 | Medizin, Gesundheit

description: Background: Biofilms have great significance in healthcare-associated infections owing to their inherent tolerance and resistance to antimicrobial therapies. New approaches to prevent and treat unwanted biofilms are urgently required. To this end, three seagrass species (Enhalus acoroides, Halophila ovalis and Halodule pinifolia) collected in Vietnam and in India were investigated for their effects in mediating non-lethal interactions on sessile bacterial (Escherichia coli) and fungal (Candida albicans) cultures. The present study was focused on anti-biofilm activities of seagrass extracts, without killing cells. Methods: Methanolic extracts were characterized, and major compounds were identified by MS/MS analysis. The antibiofilm properties of the seagrass extracts were tested at sub-lethal concentrations by using microtiter plate adhesion assay. The performance of the most promising extract was further investigated in elegant bioreactors to reproduce mature biofilms both at the solid/liquid and the solid/air interfaces. Dispersion and bioluminescent assays were carried out to decipher the mode of action of the bioactive extract. Results: It was shown that up to 100 ppm of crude extracts did not adversely affect microbial growth, nor do they act as a carbon and energy source for the selected microorganisms. Seagrass extracts appear to be more effective in deterring microbial adhesion on hydrophobic surfaces than on hydrophilic. The results revealed that non-lethal concentrations of E. acoroides leaf extract: i) reduce bacterial and fungal coverage by 60.9 and 73.9%, respectively; ii) affect bacterial biofilm maturation and promote dispersion, up to 70%, in fungal biofilm; iii) increase luminescence in Vibrio harveyi by 25.8%. The characterization of methanolic extracts showed the unique profile of the E. acoroides leaf extract. Conclusions:E. acoroides leaf extract proved to be the most promising extract among those tested. Indeed, the selected non-lethal concentrations of E. acoroides leaf extract were found to exert an antibiofilm effect on C. albicans and E. coli biofilm in the first phase of biofilm genesis, opening up the possibility of developing preventive strategies to hinder the adhesion of microbial cells to surfaces. The leaf extract also affected the dispersion and maturation steps in C. albicans and E. coli respectively, suggesting an important role in cell signaling processes. © 2018 The Author(s).
Environmental factors affecting soil metals near outlet roads in Poznan, Poland: impact of grain size, soil depth, and wind dispersal
Creators: name: Ciazela, Jakub
name: Siepak, Marcin
Publisher: name: Dordrecht : Springer
Year: 2016
Subjects: subject: Soil pollution
subject: Soil metal
subject: Road transport
subject: Grain size
subject: Dewey Decimal Classification::500 | Naturwissenschaften
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: We determined the Cd, Cr, Cu, Ni, Pb, and Zn concentrations in soil samples collected along the eight main outlet roads of Poznan. Samples were collected at distances of 1, 5, and 10 m from the roadway edges at depth intervals of 0-20 and 40-60 cm. The metal content was determined in seven grain size fractions. The highest metal concentrations were observed in the smallest fraction (<0.063 mm), which were up to four times higher than those in sand fractions. Soil Pb, Cu, and Zn (and to a lesser extent Ni, Cr, and Cd) all increased in relation to the geochemical background. At most sampling sites, metal concentrations decreased with increasing distance from roadway edges and increasing depth. In some locations, the accumulation of metals in soils appears to be strongly influenced by wind direction. Our survey findings should contribute in predicting the behavior of metals along outlet road, which is important by assessing sources for further migration of heavy metals into the groundwater, plants, and humans.
K model for designing Data Driven Test Automation Frameworks and its Design Architecture Snow Leopard
Creators: name: Kachewar, Rohan R.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Automated testing improves the efficiency of testing practice at various levels of projects in the organization. Unfortunately, we do not have a common architecture or common standards for designing frameworks across different test levels, projects and test tools which can assist developers, testers and business analysts. To address the above problem, in this paper, I have first proposed a unique reference model and then a design architecture using the proposed model for designing any Data Driven Automation Frameworks. The reference model is K model which can be used for modeling any data-driven automation framework. The unique Design architecture, based on above model is Snow Leopard.
Zum Ares Borghese
Creators: name: Deterling, Jörg
Publisher: name: Archäologischer Anzeiger
Year: 2023

description: Gegenstand des Artikels ist der statuarische Typus des Ares Borghese, der auf ein klassisch-griechisches Vorbild zurückgeht und in zahlreichen römisch-kaiserzeitlichen Kopien bekannt ist. Eine genaue Beschreibung des Erhaltungszustands der namengebenden und am besten erhaltenen Kopie sowie ein eingehender Vergleich der bekannten Repliken geben eine bessere Vorstellung des verlorenen Originals. Stilistische Vergleiche verhelfen zu einer Datierung ins Jahrzehnt 430/420 v. Chr. Die alte Zuschreibung an Alkamenes kann nicht untermauert werden; dennoch ist zu beachten, dass der Ares Borghese die einzige Statue dieses Gottes aus dem 5. Jh. ist, die auf einer breiten Kopienbasis rekonstruiert werden kann, und dass er der am häufigsten kopierte nicht-polykletische Typus dieser Zeit ist. Hinsichtlich der Rezeption des Typus in der römischen Kaiserzeit existiert eine ganze Reihe von Umdeutungen, als Bildnisträger (von Kaisern und Privatpersonen) sowie als Herakles und Asklepios.
description: Archäologischer Anzeiger, 1. Halbband 2023
Cymbalaria
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: L. Cymbalaria (L.) Miller (Cymbalaria muralis G. M. Sch.) Cat. 269. l: Vionnaz (J.); Choex (Marietan); Val d'Illiez (idem). - 2:Saillon (Gams).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Zur Chronologie des antiken Thera
Creators: name: Kose, Arno
name: Engels, Benjamin
name: Trümper, Monika
Publisher: name: Archäologischer Anzeiger
Year: 2023

description: Die antike Stadt Thera wurde zwischen 1896 und 1902 unter der Leitung von Friedrich Hiller von Gaertringen umfassend freigelegt, aber systematische archäologische Untersuchungen zur Erforschung der Stadtgeschichte fanden erst unter der Leitung von Wolfram Hoepfner in den 1990ern statt. Hoepfners Team führte Bauforschungen durch und legte erstmals stratigraphische Sondagen in verschiedenen Bereichen der Stadt an, die aber nicht alle publiziert wurden. Ziel dieses Beitrags ist es, anhand der alten Grabungsdokumentation die Sondagen an zwei Stellen zu publizieren, die exemplarisch Aufschluss über die Entwicklung der Stadt von der archaischen Zeit bis in die römische Kaiserzeit liefern. Die 1994 durchgeführte Sondage am Apollon Karneios-Heiligtum belegt erstmals, dass für den Komplex zwei große Bauphasen zu rekonstruieren sind. Das Heiligtum wurde vermutlich in der archaischen Zeit als Oikos-Tempel mit Vorhof errichtet und in der hellenistischen Zeit um einen großen Hof mit Zisterne und Nebenräumen erweitert. Die 1991 und 1992 angelegten Sondagen in der Straße 11 zeigen, dass diese Straße und ihre Randbebauung nicht vor der hellenistischen Zeit zu datieren sind. In dieser Sondage wurde erstmals eine mächtige Schicht aus Bimssteinen in vollem Umfang freigelegt, die direkt über dem anstehenden Felsen aufgeschüttet wurde und zur Unterfütterung der Straße diente. Solche Nivellierungsschichten aus Bimssteinen wurden seit den frühesten Grabungen an verschiedenen Stellen in der Stadt angetroffen, aber gewöhnlich nicht bis zu ihrer Unterkante ausgegraben und bislang auch nicht systematisch im Hinblick auf ihre Datierung und Funktion ausgewertet. In diesem Beitrag wird abschließend argumentiert, dass selbst punktuelle Untersuchungen wertvolle Ergebnisse und Erkenntnisse liefern und dass solche Sondagen im antiken Thera dringend fortgesetzt werden sollten, um zahlreiche nach wie vor offene Fragen zu klären.
description: Archäologischer Anzeiger, 1. Halbband 2023
Metallfunde aus den neuen Ausgrabungen des DAI in Olympia (2006–2017)
Creators: name: Scarci, Azzurra
Publisher: name: Archäologischer Anzeiger
Year: 2023

description: In den Ausgrabungen südlich des Stadions zwischen 2006 und 2012 und der anschließenden Grabung südlich der Südhalle in den Jahren 2016 und 2017 wurde eine Vielzahl an Metallobjekten in vollständigem oder fragmentiertem Zustand gefunden. Die meisten konnten inzwischen restauriert werden. Die vorliegende Studie konzentriert sich auf die Materialgattung der Waffen und Rüstungsstücke, da von ihnen eine größere Anzahl in teilweise gutem Zustand erhalten ist und sie weiterführende Überlegungen zum Anlass und Vorgehen bei der Weihung im Heiligtum zulassen.
description: Archäologischer Anzeiger, 1. Halbband 2023
Eros and Psyche
Creators: name: Meintani, Anastasia
Publisher: name: Archäologischer Anzeiger
Year: 2023

description: A unicum in the corpus of coroplastic production – a terracotta group from Egypt – is exhibited in a case in the Benaki Museum in Athens. Whereas what is depicted is quite straightforward, a distorted version of Eros and Psyche, the actual identity of the figures represented is less so. Semeli Pingiatoglou in thoroughly publishing the piece identifies them as mime actors. In this paper, a different interpretation is offered: it is based, on the one hand, on the characteristics of the Eros iconography, and on the other, on what is (un-)known about mimes.
description: Archäologischer Anzeiger, 1. Halbband 2023
High temperature and vapor pressure deficit aggravate architectural effects but ameliorate non-architectural effects of salinity on dry mass production of tomato
Creators: name: Chen, Tsu-Wei
name: Nguyen, Thi M.N.
name: Kahlen, Katrin
name: Stützel, Hartmut
Publisher: name: Lausanne : Frontiers Media S.A.
Year: 2015
Subjects: subject: dynamicfunctional-structuralplantmodel
subject: canopyarchitecture
subject: canopyphotosynthesis
subject: allometric relationship
subject: tomato
subject: hightemperature
subject: salinity
subject: stresscombination
subject: Dewey Decimal Classification::500 | Naturwissenschaften

description: Tomato (Solanum lycopersicum L.) is an important vegetable crop and often cultivated in regions exposed to salinity and high temperatures (HT) which change plant architecture, decrease canopy light interception and disturb physiological functions. However, the long-term effects of salinity and HT combination (S+HT) on plant growth are still unclear. A dynamic functional-structural plant model (FSPM) of tomato was parameterized and evaluated for different levels of S+HT combinations. The evaluated model was used to quantify the contributions of morphological changes (architectural effects) and physiological disturbances (non-architectural effects) on the reduction of shoot dry mass under S+HT. The model predicted architectural variables with high accuracy (>85%), which ensured the reliability of the model analyses. HT enhanced architectural effects but reduced non-architectural effects of salinity on dry mass production. The stronger architectural effects of salinity under HT could not be counterbalanced by the smaller non-architectural effects. Therefore, long-term influences of HT on shoot dry mass under salinity were negative at the whole plant level. Our model analysis highlights the importance of plant architecture at canopy level in studying the plant responses to the environments and shows the merits of dynamic FSPMs as heuristic tools.
Regulatory coiled-coil domains promote head-to-head assemblies of AAA+ chaperones essential for tunable activity control
Creators: name: Carroni, Marta
name: Franke, Kamila B.
name: Maurer, Michael
name: Jäger, Jasmin
name: Hantke, Ingo
name: Gloge, Felix
name: Linder, Daniela
name: Gremer, Sebastian
name: Turgay, Kürsad
name: Bukau, Bernd
name: Mogk, Axel
Publisher: name: Cambridge : eLife Sciences Publications
Year: 2017
Subjects: subject: chaperone
subject: anisotropy
subject: ATPase activity assay
subject: cell viability
subject: cross linking
subject: cryoelectron microscopy
subject: cytotoxicity
subject: enzyme specificity
subject: image processing
subject: light scattering
subject: nonhuman
subject: polyacrylamide gel electrophoresis
subject: polymerase chain reaction
subject: protein degradation
subject: size exclusion chromatography
subject: stress
subject: Western blotting
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie

description: Ring-forming AAA+ chaperones exert ATP-fueled substrate unfolding by threading through a central pore. This activity is potentially harmful requiring mechanisms for tight repression and substrate-specific activation. The AAA+ chaperone ClpC with the peptidase ClpP forms a bacterial protease essential to virulence and stress resistance. The adaptor MecA activates ClpC by targeting substrates and stimulating ClpC ATPase activity. We show how ClpC is repressed in its ground state by determining ClpC cryo-EM structures with and without MecA. ClpC forms large two-helical assemblies that associate via head-to-head contacts between coiled-coil middle domains (MDs). MecA converts this resting state to an active planar ring structure by binding to MD interaction sites. Loss of ClpC repression in MD mutants causes constitutive activation and severe cellular toxicity. These findings unravel an unexpected regulatory concept executed by coiled-coil MDs to tightly control AAA+ chaperone activity.