cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Audio Watermarking with Error Correction
Creators: name: Chadha, Aman
name: Gangundi, Sandeep
name: Goel, Rishabh
name: Dave, Hiren
name: Roja, M. Mani
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cryptography and Security (cs.CR)
subject: Information Theory (cs.IT)
subject: Multimedia (cs.MM)
subject: Audio and Speech Processing (eess.AS)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: In recent times, communication through the internet has tremendously facilitated the distribution of multimedia data. Although this is indubitably a boon, one of its repercussions is that it has also given impetus to the notorious issue of online music piracy. Unethical attempts can also be made to deliberately alter such copyrighted data and thus, misuse it. Copyright violation by means of unauthorized distribution, as well as unauthorized tampering of copyrighted audio data is an important technological and research issue. Audio watermarking has been proposed as a solution to tackle this issue. The main purpose of audio watermarking is to protect against possible threats to the audio data and in case of copyright violation or unauthorized tampering, authenticity of such data can be disputed by virtue of audio watermarking.
description: watermarking; audio watermarking; data hiding; data confidentiality
Fractals, coherent states and self-similarity induced noncommutative geometry
Creators: name: Vitiello, Giuseppe
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The self-similarity properties of fractals are studied in the framework of the theory of entire analytical functions and the $q$-deformed algebra of coherent states. Self-similar structures are related to dissipation and to noncommutative geometry in the plane. The examples of the Koch curve and logarithmic spiral are considered in detail. It is suggested that the dynamical formation of fractals originates from the coherent boson condensation induced by the generators of the squeezed coherent states, whose (fractal) geometrical properties thus become manifest. The macroscopic nature of fractals appears to emerge from microscopic coherent local deformation processes.
description: 2 figures
First-principles study of high conductance DNA sequencing with carbon nanotube electrodes
Creators: name: Chen, X.
name: Rungger, I.
name: Pemmaraju, C. D.
name: Schwingenschlogl, U.
name: Sanvito, S.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Rapid and cost-effective DNA sequencing at the single nucleotide level might be achieved by measuring a transverse electronic current as single-stranded DNA is pulled through a nano-sized pore. In order to enhance the electronic coupling between the nucleotides and the electrodes and hence the current signals, we employ a pair of single-walled close-ended (6,6) carbon nanotubes (CNTs) as electrodes. We then investigate the electron transport properties of nucleotides sandwiched between such electrodes by using first-principles quantum transport theory. In particular we consider the extreme case where the separation between the electrodes is the smallest possible that still allows the DNA translocation. The benzene-like ring at the end cap of the CNT can strongly couple with the nucleobases and therefore both reduce conformational fluctuations and significantly improve the conductance. The optimal molecular configurations, at which the nucleotides strongly couple to the CNTs, and which yield the largest transmission, are first identified. Then the electronic structures and the electron transport of these optimal configurations are analyzed. The typical tunneling currents are of the order of 50 nA for voltages up to 1 V. At higher bias, where resonant transport through the molecular states is possible, the current is of the order of several $μ$A. Below 1 V the currents associated to the different nucleotides are consistently distinguishable, with adenine having the largest current, guanine the second-largest, cytosine the third and finally thymine the smallest. We further calculate the transmission coefficient profiles as the nucleotides are dragged along the DNA translocation path and investigate the effects of configurational variations. Based on these results we propose a DNA sequencing protocol combining three possible data analysis strategies.
description: 12 pages, 17 figures, 3 tables
Zur Wahl der Balancefläche von Rudern im Propellerstrahl
Creators: name: Romahn, Karl
name: Thieme, Hans
Publisher: name: TUHH Universitätsbibliothek
Year: 1957
Subjects: classificationCode: 52.00
subject: Maschinenbau, Energietechnik, Fertigungstechnik: Allgemeines

description: Zur Wahl der Balancefläche von Rudern im Propellerstrahl
Central Counterparty Risk
Creators: name: Arnsdorf, Matthias
Publisher: name: arXiv
Year: 2012
Subjects: subject: Risk Management (q-fin.RM)
subject: Pricing of Securities (q-fin.PR)
subject: FOS: Economics and business

description: A clearing member of a Central Counterparty (CCP) is exposed to losses on their default fund and initial margin contributions. Such losses can be incurred whenever the CCP has insufficient funds to unwind the portfolio of a defaulting clearing member. This does not necessarily require the default of the CCP itself. In this note we aim to quantify the risk a financial institution has when facing a CCP. We show that a clearing member's CCP risk is given by a sum of exposures to each of the other clearing members. This arises because of the implicit default insurance that each member has provided in the form of mutualised, loss sharing collateral. We calculate the exposures by explicitly modeling the capital structure of a CCP as well as the loss distributions of the individual member portfolios. An important consideration in designing the model is the limited transparency with respect to the portfolio composition and collateral levels of individual clearing members. To overcome this we leverage the fact that, for a typical CCP, margin levels are risk-based. In particular, we parameterise the portfolio loss tail as a Pareto distribution and we calibrate this to the CCP defined probability of losses exceeding the posted initial margin levels. A key aspect of the model is that we explicitly take into account wrong-way risk, i.e. the fact that member defaults are more likely to occur in stressed market conditions, as well as potential contagion between a member's default and the losses on his portfolio.
Dispersion relation for water waves with non-constant vorticity
Creators: name: Karageorgis, Paschalis
Publisher: name: arXiv
Year: 2012
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We derive the dispersion relation for linearized small-amplitude gravity waves for various choices of non-constant vorticity. To the best of our knowledge, this relation is only known explicitly in the case of constant vorticity. We provide a wide range of examples including polynomial, exponential, trigonometric and hyperbolic vorticity functions.
Gestion des données de recherche et Data Management Plan : développer une offre de service pour accompagner les chercheurs et les chercheuses
Creators: name: Santos, Anouk
name: Muller, Floriane
Publisher: name: Zenodo
Year: 2022
Subjects: données de recherche
services en bibliothèques
Data Management Plan (DMP)

description: Support de présentation de la formation BiblioSuisse donnée le 11 octobre 2022 à Lausanne (Suisse).
A Aplicação da Logística Baseada em Desempenho como Estratégia de Redução de Risco Associado aos Processos de Manutenção de Equipamentos
Creators: name: Barros, Felipe
Publisher: name: figshare
Year: 2021
Subjects: subject: 160604 Defence Studies
subject: FOS: Political science
subject: 150309 Logistics and Supply Chain Management
subject: FOS: Economics and business

description: O conceito de Logística Baseada em Desempenho (em inglês, Performance Based Logistics - PBL) emergiu no final do século XX como proposta para reduzir os gastos militares. À luz deste sistema, realizou-se uma análise dos processos de aquisição voltados à manutenção de equipamentos de engenharia do Exército, buscando pontos que poderiam ser aperfeiçoados pela PBL. Para tanto, realizou-se uma pesquisa com ordenadores de despesa, a fim de entender o impacto do sistema de aquisições atual sobre a disponibilidade do material e seus principais gargalos. Com isso, foram observados problemas ligados à carga burocrática, além dos riscos ligados à dissociação de interesses entre a administração e os fornecedores. Comparando os resultados com os princípios da PBL, observa-se como a adoção deste sistema pode auxiliar os gestores a reduzir encargos burocráticos, realizar transferência de risco da contratante para a contratada, além de promover uma convergência de
interesses entre administração e empresários.
Frustration of the isotropic-columnar phase transition of colloidal hard platelets by a transient cubatic phase
Creators: name: Marechal, Matthieu
name: Patti, Alessandro
name: Dennison, Matthew
name: Dijkstra, Marjolein
Publisher: name: arXiv
Year: 2011
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Using simulations and theory, we show that the cubatic phase is metastable for three model hard platelets. The locally favored structures of perpendicular particle stacks in the fluid prevent the formation of the columnar phase through geometric frustration resulting in vitrification. Also, we find a direct link between structure and dynamic heterogeneities in the cooperative rotation of particle stacks, which is crucial for the devitrification process. Finally, we show that the life time of the glassy cubatic phase can be tuned by surprisingly small differences in particle shape.
description: Submitted to Phys. Rev. Lett
Composite Higgs under LHC Experimental Scrutiny
Creators: name: Espinosa, J. R.
name: Grojean, C.
name: Muehlleitner, M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The LHC has been built to understand the dynamics at the origin of the breaking of the electroweak symmetry. Weakly coupled models with a fundamental Higgs boson have focused most of the attention of the experimental searches. We will discuss here how to reinterpret these searches in the context of strongly coupled models where the Higgs boson emerges as a composite particle. In particular, we use LHC data to constrain the compositeness scale. We also briefly review the prospects to observe other bosonic and fermionic resonances of the strong sector.
description: 6 pages. Contribution to the proceedings of Hadron Collider Physics Symposium 2011, Paris Nov. 14-18
High-throughput discovery of novel small-molecule inhibitors of acid Ceramidase
Creators: name: Aseeri, Mazen
name: Abad, José Luis
name: Delgado, Antonio
name: Fabriàs, Gemma
name: Triola, Gemma
name: Casas, Josefina
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biochemistry
subject: Cell Biology
subject: Molecular Biology
subject: Pharmacology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Cancer
subject: Inorganic Chemistry

description: Ceramide has a key role in the regulation of cellular senescence and apoptosis. As Ceramide levels are lowered by the action of acid ceramidase (AC), abnormally expressed in various cancers, the identification of AC inhibitors has attracted increasing interest. However, this finding has been mainly hampered by the lack of formats suitable for the screening of large libraries. We have overcome this drawback by adapting a fluorogenic assay to a 384-well plate format. The performance of this optimised platform has been proven by the screening a library of 4100 compounds. Our results show that the miniaturised platform is well suited for screening purposes and it led to the identification of several hits, that belong to different chemical classes and display potency ranges of 2–25 µM. The inhibitors also show selectivity over neutral ceramidase and retain activity in cells and can therefore serve as a basis for further chemical optimisation.
DISTAL informa Newsletter Settembre 2021
Creators: name: Braschi, Ilaria
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2021
Subjects: AGR/01 Economia ed estimo rurale
AGR/02 Agronomia e coltivazioni erbacee
AGR/03 Arboricoltura generale e coltivazioni arboree
AGR/04 Orticoltura e floricoltura
AGR/05 Assestamento forestale e selvicoltura
AGR/07 Genetica agraria
AGR/08 Idraulica agraria e sistemazioni idraulico-forestali
AGR/09 Meccanica agraria
AGR/10 Costruzioni rurali e territorio agroforestale
AGR/11 Entomologia generale e applicata
AGR/12 Patologia vegetale
AGR/13 Chimica agraria
AGR/14 Pedologia
AGR/15 Scienze e tecnologie alimentari
AGR/16 Microbiologia agraria
AGR/17 Zootecnica generale e miglioramento genetico
AGR/18 Nutrizione e alimentazione animale
AGR/19 Zootecnica speciale
AGR/20 Zoocolture
BIO/01 Botanica generale
BIO/10 Biochimica
CHIM/03 Chimica generale e inorganica
CHIM/06 Chimica organica
IUS/03 Diritto agrario
VET/04 Ispezione degli alimenti di origine animale

description: Bollettino mensile di informazione che raccoglie eventi, notizie, articoli e attività del DISTAL. A cura dell'Area Comunicazione DISTAL
The baryonic Tully-Fisher relation and galactic outflows
Creators: name: Dutton, Aaron A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Most of the baryons in the Universe are not in the form of stars and cold gas in galaxies. Galactic outflows driven by supernovae/stellar winds are the leading mechanism for explaining this fact. The scaling relation between galaxy mass and outer rotation velocity (also known as the baryonic Tully-Fisher relation, BTF) has recently been used as evidence against this viewpoint. We use a LCDM based semi-analytic disk galaxy formation model to investigate these claims. In our model, galaxies with less efficient star formation and higher gas fractions are more efficient at ejecting gas from galaxies. This is due to the fact that galaxies with less efficient star formation and higher gas fractions tend to live in dark matter haloes with lower circular velocities, from which less energy is required to escape the potential well. In our model the intrinsic scatter in the BTF is 0.15 dex, and mostly reflects scatter in dark halo concentration. The observed scatter, equal to 0.24 dex, is dominated by measurement errors. The best estimate for the intrinsic scatter is that it is less than 0.15 dex, and thus our LCDM based model (which does not include all possible sources of scatter) is only just consistent with this. In our model, gas rich galaxies, at fixed virial velocity (V_vir), with lower stellar masses have lower baryonic masses. This is consistent with the expectation that galaxies with lower stellar masses have had less energy available to drive an outflow. However, when the outer rotation velocity (V_flat) is used the correlation has the opposite sign, with a slope in agreement with observations. This is due to scatter in the relation between V_flat and V_vir. In summary, contrary to some previous claims, we show that basic features of the BTF are consistent with a LCDM based model in which the low efficiency of galaxy formation is determined by galactic outflows.
description: 7 pages, 4 figures, accepted to MNRAS
Cooperative Jamming for Secure Communications in MIMO Relay Networks
Creators: name: Huang, Jing
name: Swindlehurst, A. Lee
Publisher: name: arXiv
Year: 2011
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: Secure communications can be impeded by eavesdroppers in conventional relay systems. This paper proposes cooperative jamming strategies for two-hop relay networks where the eavesdropper can wiretap the relay channels in both hops. In these approaches, the normally inactive nodes in the relay network can be used as cooperative jamming sources to confuse the eavesdropper. Linear precoding schemes are investigated for two scenarios where single or multiple data streams are transmitted via a decode-and-forward (DF) relay, under the assumption that global channel state information (CSI) is available. For the case of single data stream transmission, we derive closed-form jamming beamformers and the corresponding optimal power allocation. Generalized singular value decomposition (GSVD)-based secure relaying schemes are proposed for the transmission of multiple data streams. The optimal power allocation is found for the GSVD relaying scheme via geometric programming. Based on this result, a GSVD-based cooperative jamming scheme is proposed that shows significant improvement in terms of secrecy rate compared to the approach without jamming. Furthermore, the case involving an eavesdropper with unknown CSI is also investigated in this paper. Simulation results show that the secrecy rate is dramatically increased when inactive nodes in the relay network participate in cooperative jamming.
description: 30 pages, 7 figures, to appear in IEEE Transactions on Signal Processing
title: Defining altruism
Creators: name: Clarke, John
Publisher: name: The University of Edinburgh
Year: 2023
Subjects: subject: altruism
subject: decision making
subject: utility theory

description: The meaning of altruism has changed over time and varies across academic disciplines. I review the history of its meaning and report the results of a structured review that identifies the current controversies, specifically the need for cost or risk to a potential altruist and the need for benefits to the recipient to be realized or just intended. I propose a meaning of altruism that addresses the controversies: an intentional decision, by an individual, to act based on what is best from a social, rather than personal, perspective. I defend it from both a decision-analytics perspective and a philosophical perspective. I argue that the decision of a potential altruist to act for the benefit of others instead of self is to act as if the decision maker is just one of many in a society rather than a privileged person. I argue that the decision is best judged as altruistic or not by an independent arbiter representing the largest community of those affected directly and indirectly, rather than by the potential altruist. Even judged by others, altruism is achievable, under this meaning, by everyone.
Die Musikverlagsdatenbank der HMT Leipzig und SLUB Dresden bei der SaxFDM Digital Kitchen vom 13.04.23
Creators: name: Rosenthal, Maximilian
Publisher: name: Zenodo
Year: 2023
Subjects: SaxFDM
HMT Leipzig
Music Publishers
Musikverlagsforschung
Musikwissenschaft
Musicology
SLUB Dresden

description: Um Aspekte einer Alltags-Kulturgeschichte näher zu kommen, erfasst das DFG-geförderte Projekt „Geschmacksbildung und Verlagspolitik. Repertoireentwicklung und Kanonisierung im Spiegel der Absatzentwicklung Leipziger Musikverlage (ca. 1830–1930)“ überlieferte Wirtschaftsdaten dreier Musikverlage (C. F. Peters, Friedrich Hofmeister, Rieter-Biedermann). Auf der Grundlage dieser Daten werden neue Fragen zum Musikalienmarkt des späten 19. und frühen 20. Jahrhunderts jenseits persönlicher Vorlieben einzelner Akteure gestellt. Dieser Foliensatz wurde bei der SaxFDM Digital Kitchen am 13.04.2023 benutzt.
Block-Orthogonal Space-Time Code Structure and Its Impact on QRDM Decoding Complexity Reduction
Creators: name: Ren, Tian Peng
name: Guan, Yong Liang
name: Yuen, Chau
name: Zhang, Er Yang
Publisher: name: arXiv
Year: 2011
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: Full-rate space time codes (STC) with rate = number of transmit antennas have high multiplexing gain, but high decoding complexity even when decoded using reduced-complexity decoders such as sphere or QRDM decoders. In this paper, we introduce a new code property of STC called block-orthogonal property, which can be exploited by QR-decomposition-based decoders to achieve significant decoding complexity reduction without performance loss. We show that such complexity reduction principle can benefit the existing algebraic codes such as Perfect and DjABBA codes due to their inherent (but previously undiscovered) block-orthogonal property. In addition, we construct and optimize new full-rate BOSTC (Block-Orthogonal STC) that further maximize the QRDM complexity reduction potential. Simulation results of bit error rate (BER) performance against decoding complexity show that the new BOSTC outperforms all previously known codes as long as the QRDM decoder operates in reduced-complexity mode, and the code exhibits a desirable complexity saturation property.
description: IEEE Journal of Selected Topics in Signal Processing, Vol. 5, No. 8, December 2011
Complex problem solving in search for complexity
Creators: name: Funke, Joachim
Publisher: name: Journal of Dynamic Decision Making
Year: 2019

description: Research on complex problem solving (CPS) has reached a stage where certain standards have been achieved, whereas the future development is quite ambiguous. In this situation, the editors of the Journal of Dynamic Decision Making asked a number of representative authors to share their point of view with respect to seven questions about the relevance of (complex) problem solving as a research area, about the contribution of laboratory-based CPS research to solving real life problems, about the roles of knowledge, strategies, and intuition in CPS, and about the existence of expertise in CPS.
description: Journal of Dynamic Decision Making, Vol 5 (2019)
Una Trasformata di Legendre su un modello non standard
Creators: name: Martino, Vittorio
Publisher: name: Dipartimento di Matematica, Università di Bologna
Year: 2010

description: We consider an exotic contact form on the three-dimensional sphere and we establish explicitly the existence of a non singular vector field in its kernel such that the dual form is still a contact form with the same orientation than the given one. In particular this means that a Legendre transform can be completed.
description: Bruno Pini Mathematical Analysis Seminar, Seminars 2010
The RBS1 domain of Gemin5 is intrinsically unstructured and interacts with RNA through conserved Arg and aromatic residues
Creators: name: Embarc-Buh, Azman
name: Franscisco-Velilla, Rosario
name: Camero, Sergio
name: Pérez-Cañadillas, José Manuel
name: Martínez-Salas, Encarnación
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Biophysics
subject: Biochemistry
subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: Developmental Biology
subject: 60506 Virology
subject: Computational Biology

description: Gemin5 is a multifaceted RNA-binding protein that comprises distinct structural domains, including a WD40 and TPR-like for which the X-ray structure is known. In addition, the protein contains a non-canonical RNA-binding domain (RBS1) towards the C-terminus. To understand the RNA binding features of the RBS1 domain, we have characterized its structural characteristics by solution NMR linked to RNA-binding activity. Here we show that a short version of the RBS1 domain that retains the ability to interact with RNA is predominantly unfolded even in the presence of RNA. Furthermore, an exhaustive mutational analysis indicates the presence of an evolutionarily conserved motif enriched in R, S, W, and H residues, necessary to promote RNA-binding via π-π interactions. The combined results of NMR and RNA-binding on wild-type and mutant proteins highlight the importance of aromatic and arginine residues for RNA recognition by RBS1, revealing that the net charge and the π-amino acid density of this region of Gemin5 are key factors for RNA recognition.
Risultati di regolarità per il problema dell'ostacolo relativo ad equazioni di Kolmogorov degeneri
Creators: name: Polidoro, Sergio
Publisher: name: Dipartimento di Matematica, Università di Bologna
Year: 2010

description: We prove optimal regularity for solutions to the obstacle problem for a class of second order differential operators of Kolmogorov type. We treat smooth obstacles as well as non-smooth obstacles. All our proofs follow the same line of thought and are based on blow-ups, compactness, barriers and arguments by contradiction. This problem arises in nancial mathematics, when considering path-dependent derivative contracts with the early exercise feature.
description: Bruno Pini Mathematical Analysis Seminar, Seminars 2010
Vector valued Fourier multipliers and applications
Creators: name: Guidetti, Davide
Publisher: name: Dipartimento di Matematica, Università di Bologna
Year: 2010

description: In questo seminario sono illustrati alcuni recenti sviluppi della teoria dei moltiplicatori di Fourier negli spazi L^p a valori in spazi di Banach. Seguono alcune applicazioni a problemi al contorno di tipo ellittico e a problemi misti di tipo parabolico.
description: Bruno Pini Mathematical Analysis Seminar, Seminars 2010
A First-principles Prediction of Two-Dimensional Superconductivity in Pristine B2C Single layer
Creators: name: Dai, Jun
name: Li, Zhenyu
name: Yang, Jinlong
name: Hou, Jianguo
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Superconductivity (cond-mat.supr-con)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Based on first-principles lattice dynamics and electron-phonon coupling calculations, B2C sheet is predicted to be a two-dimensional (2D) phonon-mediated superconductor with a relatively high transition temperature (Tc). The electron-phonon coupling parameter calculated is 0.92, and it is mainly contributed by low frequency out-of-plane phonon modes and electronic states with a π character. When the Coulomb pseudopotential is set to 0.10, the estimated temperature Tc is 19.2 K. To be best of our knowledge, B2C is the first pristine 2D superconductor with a Tc higher than the boiling point of liquid helium.
description: accepted by Nanoscale
Hochschulen und Forschungsinstitute
Creators: name: Redaktion, Die
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2020

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 39 Nr. 8 (1986): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Phantom Behavior Bounce with Tachyon and Non-minimal Derivative Coupling
Creators: name: Banijamali, A.
name: Fazlpour, B.
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The bouncing cosmology provides a successful solution of the cosmological singularity problem. In this paper, we study the bouncing behavior of a single scalar field model with tachyon field non-minimally coupled to itself, its derivative and to the curvature. By utilizing the numerical calculations we will show that the bouncing solution can appear in the universe dominated by such a quintom matter with equation of state crossing the phantom divide line. We also investigate the classical stability of our model using the phase velocity of the homogeneous perturbations of the tachyon scalar field.
description: 15 pages, 8 figures, Accepted for publication in JCAP. arXiv admin note: substantial text overlap with arXiv:1105.4967
Barock in Dresden. Kunst und Kunstsammlungen unter der Regierung des Kurfürsten Friedrich August I. von Sachsen und König August II. von Polen genannt August der Starke 1694-1733 und des Kurfürsten Friedrich August III. von Sachsen und Königs August III. von Polen 1735-1763
Creators: name: Börsch-Supan, Helmut
Publisher: name: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Year: 2020

description: Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege, Bd. 39 Nr. 9 (1986): Kunstchronik. Monatsschrift für Kunstwissenschaft, Museumswesen und Denkmalpflege
Entropy balance in holographic superconductors
Creators: name: Hartnoll, Sean A.
name: Pourhasan, Razieh
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In systems undergoing second order phase transitions, the temperature integral of the specific heat over temperature from zero to the critical temperature is the same in both the normal and ordered phases. This entropy balance relates the critical temperature to the distribution of degrees of freedom in the normal and ordered states. Quantum criticality and fractionalization can imply an increased number of low energy degrees of freedom in both the normal and ordered states. We explore the role of entropy balance in holographic models of superconductivity, focussing on the interplay between quantum criticality and superconductivity. We consider models with and without a ground state entropy density in the normal phase; the latter models are a new class of holographic superconductors. We explain how a normal phase entropy density manifests itself in the stable superconducting phase.
description: 1+24 pages. 5 figures
Sulla simmetria delle soluzioni stabili di alcune equazioni semilineari
Creators: name: Ferrari, Fausto
Publisher: name: Dipartimento di Matematica, Università di Bologna
Year: 2010

description: Con particolare riferimento alle proprietà di simmetria, si discuterà del comportamento delle soluzioni stabili di alcune equazioni a derivate parziali semilineari ellittiche. Verranno inoltre presentate alcune disuguaglianze pesate di tipo Poincaré; ottenute a partire da campi vettoriali che commutano con l'operatore.
description: Bruno Pini Mathematical Analysis Seminar, Seminars 2010
X-ray colour-colour selection for heavily absorbed AGN
Creators: name: Brightman, Murray
name: Nandra, Kirpal
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present a method for the identification of heavily absorbed AGN (NH>10^23 cm^-2) from X-ray photometric data. We do this using a set of XMM-Newton reference spectra of local galaxies for which we have accurate NH information, as described in Brightman & Nandra. The technique uses two rest-frame hardness ratios which are optimised for this task, which we designate HR1 (2-4/1-2 keV) and HR2 (4-16/2-4 keV). The selection method exploits the fact that while obscured AGN appear hard in HR2 due to absorption of the intrinsic source flux below ~4 keV, they appear soft in HR1 due to excess emission originating from scattered source light, thermal emission, or host galaxy emission. Such emission is ubiquitous in low redshift samples. The technique offers a very simple and straight forward way of estimating the fraction of obscured AGN in samples with relatively low signal-to-noise ratio in the X-ray band. We apply this technique to a moderate redshift (z~1) sample of AGN from the Chandra Deep Field North, finding that 61% of this sample has NH> 10^23 cm^-2. A clear and robust conclusion from our analysis, is that in deep surveys the vast majority of sources do not show hardness ratios consistent with a simple absorbed power-law. The ubiquity of complex spectra in turn shows that simple hardness ratio analysis will not yield reliable obscuration estimates, justifying the more complex colour-colour analysis described in this paper. While this method does very well at separating sources with NH> 10^23 cm^-2 from sources with lower NH, only X-ray spectroscopy can identify Compton thick sources, through the detection of the Fe Ka line. This will be made possible with the high throughput X-ray spectral capabilities of ATHENA.
description: 5 pages, 4 figures, accepted for publication by MNRAS
PIFSC report on the logbook program for the American Samoa longline fishery, January-March 2014.
Creators: name: Pacific Islands Fisheries Science Center (U.S.)
Publisher: name: U.S. Department of Commerce, National Oceanic and Atmospheric Administration, Pacific Islands Fisheries Science Center
Year: 2014
Subjects: subject: Longlining (Fisheries)--Monitoring--American Samoa.

description: This report provides a summary of the American Samoa longline fishery's catch and effort statistics for the first quarter of 2014. The fishery continues to experience challenges. Most important, catch and catch per unit effort (CPUE) of the primary target species albacore tuna are both well below long term averages. Catches of many other marketable species have also remained low during the first quarter of 2014, as they were throughout the previous year. Table 1 provides summary statistics by date of haul. This table was derived from all logbook data submitted to the American Samoa Department of Marine and Wildlife Resources and posted at the Pacific Islands Fisheries Science Center (PIFSC) by August 19, 2014. Although very long trips (60-90 days) are typical for the American Samoa longline fishery, causing delays, all logbooks recording fishing activity during the first quarter of 2014 should have been submitted by this report date.
Sharp constants in the classical weak form of the John--Nirenberg inequality
Creators: name: Vasyunin, Vasily
name: Volberg, Alexander
Publisher: name: arXiv
Year: 2012
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: F.2.2
subject: 28A80, 60D05

description: The sharp constants in the classical John--Nirenberg inequality are found by using Bellman function approach.
description: 19 pages
Novel thiadiazole-thiazole hybrids: synthesis, molecular docking, and cytotoxicity evaluation against liver cancer cell lines
Creators: name: Aljohani, Ghadah F.
name: Abolibda, Tariq Z.
name: Alhilal, Mohammad
name: Al-Humaidi, Jehan Y.
name: Alhilal, Suzan
name: Ahmed, Hoda A.
name: Gomha, Sobhi M.
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biochemistry
subject: Medicine
subject: Pharmacology
subject: Biotechnology
classificationCode: 39999
subject: Chemical Sciences not elsewhere classified
classificationCode: 69999
subject: Biological Sciences not elsewhere classified

description: One of the worst diseases, cancer claims millions of lives each year throughout the world, necessitating the creation of novel treatments. In this study, we designed a novel series of 1,3,4-thiadiazoles through the reaction of 2-(4-methyl-2-(2-(1-phenylethylidene)hydrazineyl)thiazole-5-carbonyl)-N-phenylhydrazine-1-carbothioamide (3) with the proper hydrazonoyl halides. Using the MTT assay, the newly synthesized thiadiazoles' growth-inhibitory potential against the liver cancer cell line HepG2-1 was assessed. In comparison to the standard drug doxorubicin (IC50 = 0.72 ± 0.52 µM), the results showed that two compounds, 16b and 21 (IC50 = 0.69 ± 0.41 and 1.82 ± 0.94 µM, respectively) had promising anticancer activity. The structural activity relationship (SAR) was investigated. In addition, molecular docking analysis onto quinone oxidoreductase2 (NQO2) receptor (PDB: 4ZVM) was investigated against the potent compounds to examine the reliability of the in vitro results. The newly prepared thiadiazole-thiazole hybrids are therefore regarded as potent anticancer drugs.
Silent Listeners: The Evolution of Privacy and Disclosure on Facebook
Creators: name: Stutzman, Fred
name: Gross, Ralph
name: Acquisti, Alessandro
Publisher: name: Carnegie Mellon University
Year: 2021
Subjects: subject: 80703 Human Information Behaviour
subject: FOS: Media and communications

description: Over the past decade, social network sites have experienced dramatic growth in popularity, reaching most demographics and providing new opportunities for interaction and socialization. Through this growth, users have been challenged to manage novel privacy concerns and balance nuanced trade-offs between disclosing and withholding personal information. To date, however, no study has documented how privacy and disclosure evolved on social network sites over an extended period of time. In this manuscript we use profile data from a longitudinal panel of 5,076 Facebook users to understand how their privacy and disclosure behavior changed between 2005---the early days of the network---and 2011. Our analysis highlights three contrasting trends. First, over time Facebook users in our dataset exhibited increasingly privacy-seeking behavior, progressively decreasing the amount of personal data shared publicly with unconnected profiles in the same network. However, and second, changes implemented by Facebook near the end of the period of time under our observation arrested or in some cases inverted that trend. Third, the amount and scope of personal information that Facebook users revealed privately to other connected profiles actually increased over time---and because of that, so did disclosures to ``silent listeners'' on the network: Facebook itself, third-party apps, and (indirectly) advertisers. These findings highlight the tension between privacy choices as expressions of individual subjective preferences, and the role of the environment in shaping those choices.
phi-meson production in proton-antiproton annihilation
Creators: name: Srisuphaphon, S.
name: Yan, Y.
name: Gutsche, Thomas
name: Lyubovitskij, Valery E.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Apparent channel-dependent violations of the OZI rule in nucleon-antinucleon annihilation reactions are discussed in the presence of an intrinsic strangeness component in the nucleon. Admixture of strange-antistrange quark pairs in the nucleon wave function enables the direct coupling to the phi-meson in the annihilation channel without violating the OZI rule. Three forms are considered in this work for the strangeness content of the proton wave function, namely, the uud cluster with a strange-antistrange sea quark component, kaon-hyperon clusters based on a simple chiral quark model, and the pentaquark picture. Nonrelativistic quark model calculations reveal that the strangeness magnetic moment and the strangeness contribution to the proton spin from the first two models are consistent with recent experimental data. For the third model, the uuds subsystem with the configurations FS[31]F[211]S[22] and FS[31]F[31]S[22] leads to negative values for the strangeness magnetic moment and the strangeness contribution to the proton spin. With effective quark line diagrams incorporating the 3P0 quark model we give estimates for the branching ratios of the proton-antiproton annihilation reactions at rest to two mesons. Results for the branching ratios of phi-meson production from atomic proton-antiproton s-wave states are for the first and third model found to be strongly channel dependent, in good agreement with measured rates.
description: 12 pages, 1 figure
I Teoremi di Campbell, Baker, Hausdorff e Dynkin. Storia, Prove, Problemi Aperti
Creators: name: Bonfiglioli, Andrea
Publisher: name: Dipartimento di Matematica, Università di Bologna
Year: 2010

description: The aim of this lecture is to provide an overview of facts and references about past and recent results on the Theorem of Campbell, Baker, Hausdorff and Dynkin (shortcut as the CBHD Theorem), following the recent preprint monograph [13]. In particular, we shall give sketches of the following facts: A historical précis of the early proofs (see also [1]); the statement of the CBHD Theorem as usually given in Algebra and that employed
in the Analysis of linear PDE’s; a review of proofs of the CBHD Theorem (as given by: Bourbaki; Hausdorff; Dynkin; Varadarajan) together with a unifying demonstrational approach; an application to the Third Theorem of Lie (in local form). Some new results
will be also commented: The intertwinement of the CBHD Theorem with the Theorem of Poincaré-Birkhoff-Witt and with the free Lie algebras (see [12]); recent results on optimal domains of convergence.
description: Bruno Pini Mathematical Analysis Seminar, Seminars 2010
Capacità d'insiemi su alberi, grafi e spazi metrici Ahlfors-regolari
Creators: name: Arcozzi, Nicola
Publisher: name: Dipartimento di Matematica, Università di Bologna
Year: 2010

description: Work in collaboration with R. Rochberg E. Sawyer and B. Wick [ARSW]. We show that the potential theory of Bessel-type kernels on Ahlfors-regular metric spaces is equivalent, in a precise sense, to potential theory on trees. The basis of this work was in [ARS2], where the relationship between discrete potential theory and some classical function theory was considered. Some applications [Ar] to estimation of sets' and condenser's capacity are discussed.
description: Bruno Pini Mathematical Analysis Seminar, Seminars 2010
Sull’equazione det Du = f senza ipotesi di segno
Creators: name: Cupini, Giovanni
Publisher: name: Dipartimento di Matematica, Università di Bologna
Year: 2010

description: We consider the nonlinear problem

det?u (x) = f (x) x ?

u (x) = x x ? ?

where k ? 1 is an integer,
 is a bounded smooth domain in Rn and f ? Ck ????
 satisfies
Z

f (x) dx = meas
.
The positivity of f is a standard assumption in the literature. In a recent joint paper with
B.Dacorogna and O.Kneuss (EPFL) we prove the existence of a solution u ? Ck ????
;Rn with no assumptions on the sign of f. Here we state this theorem together with some
related results and we outline the main features of the problem.
description: Bruno Pini Mathematical Analysis Seminar, Seminars 2010
Hydrogel films of methanolic Mentha piperita extract and silver nanoparticles enhance wound healing in rats with diabetes Type I
Creators: name: Mojally, Mariam
name: Sharmin, Eram
name: Alhindi, Yosra
name: Obaid, Najla A.
name: Almaimani, Riyad
name: Althubiti, Mohammad
name: Idris, Shakir
name: Abdelghany, Abdelghany H.
name: Refaat, Bassem
name: Al-Amodi, Hiba S.
name: Abdalla, Ashraf N.
name: Kamel, Hala F. M.
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biochemistry
subject: Space Science
subject: Medicine
subject: Biotechnology
classificationCode: 39999
subject: Chemical Sciences not elsewhere classified
classificationCode: 69999
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Science Policy
classificationCode: 110309
subject: Infectious Diseases
subject: FOS: Health sciences

description: Poor wound healing is considered an obstacle in diabetics, which requires effective therapy. Our goal was to investigate the combined effect of mint and silver nanoparticle hydrogel films as wound-healing agents in diabetic rats. Thirty rats were arranged into five groups. The hydrogel films were prepared through an eco-friendly method, excluding toxic solvents and diluents. Gel 1 and fucidin showed complete wound-healing effect on the 22nd day, while Gel 2 showed a faster effect on the 16th day, all compared to group 1 which healed in 25 days. Diabetic rats in group 2 healed beyond 25 days. Moreover, Gel 1 and Gel 2 decreased the fasting blood glucose. Gel 2 enhances wound healing in diabetic rats via multiple mechanisms of action, possibly due to the ability of mint and silver nanoparticles to sustain their concentration at the wound site with limited toxicity. Abbreviations: CO: castor oil; CS: corn starch; DIW: deionized water; H: hydrogel film; H-MME: hydrogel film developed with CS, PVA, CO and MME; H-SMME: hydrogel film developed with CS, PVA, CO and MME/ SNP; MME: methanolic mint extract; PVA: polyvinyl alcohol; SNP: silver nanoparticles; STZ: streptozotocin
Decadimento uniforme per equazioni integro-differenziali lineari di Volterra
Creators: name: Gatti, Stefania
Publisher: name: Dipartimento di Matematica, Università di Bologna
Year: 2011

description: This talk is devoted to some recent results concerning the exponential and the polynomial decays of the energy associated with a linear Volterra integro-differential equation of hyperbolic type in a Hilbert space, which is an abstract version of the equation describing the motion of a linearly viscoelastic solid occupying a (bounded) volume at rest.
We provide sufficient conditions for the decay to hold, without invoking differential inequalities involving the convolution kernel. A similar analysis is carried on in the whole N-dimensional real space, although both the polynomial and the exponential decay of the memory kernel lead to a polynomial decay of the energy, with a rate influenced by the space dimension N. These results are contained in two joint papers with Monica Conti and Vittorino Pata (Politecnico di Milano).
description: Bruno Pini Mathematical Analysis Seminar, Seminars 2011
Bertotti-Robinson and Melvin Spacetimes
Creators: name: Garfinkle, David
name: Glass, E. N.
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Similarities between the Melvin and Bertotti-Robinson spacetimes are discussed and a uniqueness conjecture is formulated.