cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Properties of young star cluster systems: the age signature from near-infrared integrated colours
Creators: name: Santos, J. F. C.
name: Dottori, H.
name: Grosbøl, P.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: A recent JHKs study of several grand-design spiral galaxies shows a bimodal distribution of their system of star clusters and star forming complexes in colour-magnitude and colour-colour diagrams. In a comparison with stellar population models including gas, the (J-H) vs (H-Ks) diagram reveals that embedded clusters, still immersed in their parental clouds of gas and dust, generally have a redder (H-Ks) colour than older clusters, whose gas and dust have already been ejected. This bimodal behaviour is also evident in the colour-magnitude diagram MK vs (J-Ks), where the brightest clusters split into two sequences separating younger from older clusters. In addition, the reddening-free index Qd = (H-Ks) - 0.884 (J-H) has been shown to correlate with age for the young clusters and thus provided an effective way to differentiate the embedded clusters from the older ones. We aim to study the behaviour of these photometric indices for star cluster systems in the Local Group. We investigate the effectiveness of the Qd index in sorting out clusters of different ages at their early evolutionary stages. Surface photometry was carried out for 2MASS images of populous clusters younger than ~100Myr whose ages were available. Some clusters, particularly the embedded ones, were studied for the first time using this method. The integrated magnitudes and colours extracted from the surface photometry of the most populous clusters/complexes in the Local Group shows the expected bimodal distribution in the colour-colour and colour-magnitude diagrams. In particular, we confirm the index Qd as a powerful tool for distinguishing clusters younger than about 7Myr from older clusters. (abridged)
description: 10 pages, 11 figures; accepted for publication in A&A
title: Interkulturelle Kompetenz in Beratungsberufen
title: Stefan Schmid: Beratungskompetenz für eine globalisierte Gesellschaft – Kultur, Globalisierung, Migration. Göttingen: Vandenhoeck & Ruprecht, 2021, 108 S., 15,00 €.
Creators: name: Bertram, Sabine
Publisher: name: Universität Kassel
Year: 2022
Subjects: subject: 300
subject: Coaching
subject: Beratung
subject: Interkulturelle Kompetenz
subject: Rezension

description: Gefördert im Rahmen des Projekts DEAL
The idea of Slavic reciprocity in Czech nationalist thinking in the 1860s and early 1870s (a case study of the Sokol movement) (Rusin. 2022. № 69)
Creators: name: Kotov, Viktor
Publisher: name: figshare
Year: 2023
Subjects: European history (excl. British, classical Greek and Roman)
History of empires, imperialism and colonialism
International history

description: The author uses the case of the Sokol (Czech for a “falcon”) movement in the 1860s - early 1870s to examine the ideas of the Slavic origin of the Czech nation and its kind of “kinship” with the other Slavs as an important component of Czech nationalist thinking. The first Sokol was founded at the turn of 1862 in Prague and followed the model of the German “Turnvereins”, combining nationalism with physical exercises. Analysing the print media that played a vital role in Czech nationalist culture, the author shows that Czech nationalists constantly sought to emphasize their belonging to the Slavs through verbal, visual, and musical representaions. Among the main principles of Czech nationalist thinking was totalism, which meant conceiving the nation as the highest value. Putting Czech national interests over everything else led Czech nationalists to take the idea of Slavic reciprocity as their subsidiary identity used as an instrument to define and achieve their goals. One of the manifestations of this approach was the Czech commitment to the concept of Austro-Slavism - the cooperation of Slavic nations to make the policy of the Habsburg monarchy serve their joint interests. This concept can be associated with the stable interest in the issues of Galician Poles, Slovenes, and Croats. The attention of Czech nationalists to the rest of the Slavs had a wave-like character. During the period under study, such waves were caused by one of the regular Montenegrin-Turkish military conflicts in 1862 (the popularity of the so-called Junak or heroic discourse), the January Uprising in 1863 (PoLonophiLia and Russophobia) and the Austro-Hungarian Compromise of 1867, which made Czech nationalists seek the external support (Russophilia). These trends have influenced the formation of the Sokol culture and the activities of the Sokol societies.
Resonant optical excitation of longitudinal-optical phonons and intermixing in InAsAlAs single quantum dots
Creators: name: Sarkar, D.
name: Van Der Meulen, H.P.
name: Calleja, J.M.
name: Meyer, J.M.
name: Haug, Rolf J.
name: Pierz, Klaus
Publisher: name: College Park, MD : American Institute of Physics
Year: 2008
Subjects: subject: Absorption spectra
subject: Excited states
subject: Phonons
subject: Photoexcitation
subject: Photoluminescence spectroscopy
subject: Resonance
subject: Semiconducting indium compounds
subject: Intermixing
subject: Photoluminescence excitation spectroscopy
subject: Resonant absorption
subject: Resonant optical excitation
subject: Single quantum dots
subject: Semiconductor quantum dots
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Excitations of a single InAsAlAs self-assembled quantum dot were investigated by photoluminescence excitation spectroscopy. Resonant absorption by longitudinal-optical (LO) phonons of the quantum dot and the barriers is observed. In particular, a resonance at 41 meV is attributed to the AlAs-like mode of InAlAs with low Al content. Our results represent a direct optical measure of the intermixing (estimated below 10%) in a single quantum dot. They also demonstrate that all LO phonons of this mixed quantum dot system couple to the exciton states. © 2008 American Institute of Physics.
Bildung bioaktiver Alkenale und Oxylipide durch eine immobilisierte Hydroperoxid-Lyase sowie Enzyme des Lipoxygenase-Weges aus Mungbohnen (Phaseolus radiatus L.)
Creators: name: Rehbock, Bettina
Publisher: name: Hannover : Universität
Year: 1998
Subjects: subject: Hydroperoxide iyase
subject: enzyme immobilization
subject: lipoxygenase pathway
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: [no abstract]
O projecto Pintasilgo: para uma cultura política do cuidado
Creators: name: Borges-Duarte, Irene
name: Braga, Joaquim
Publisher: name: Instituto de Estudos Filosóficos
Year: 2022
Subjects: Cuidado
Maria de Lourdes Pintasilgo
Política

description: Conferência ministrada por Irene Borges-Duarte e presidida por Joaquim Braga no âmbito do evento organizado pelo Instituto de Estudos Filosóficos da Faculdade de Letras da Universidade de Coimbra intitulado "Para uma ética e uma política do cuidado: Em torno dos paradigmas de Maria de Lourdes Pintasilgo", coordenado por João Maria André. Este evento contou também com apresentações de Isabel Allegro de Magalhães, Maria Fernanda Henriques e Marília Rosado Carrilho.
Quantum confinement effects in Si/Ge heterostructures with spatially ordered arrays of self-assembled quantum dots
Creators: name: Agafonov, Oleksiy B.
name: Dais, Christian
name: Grützmacher, Detlev
name: Haug, Rolf J.
Publisher: name: College Park, MD : American Institute of Physics
Year: 2010
Subjects: subject: Confinement potential
subject: Double barriers
subject: Ge quantum dot
subject: Heterostructures
subject: Hole state
subject: Magnetotunneling
subject: Ordered array
subject: Parabolic confinements
subject: Quantum confinement effects
subject: Quantum Dot
subject: Self assembled quantum dots
subject: Si/Ge
subject: Zero bias
subject: Germanium
subject: Resonant tunneling
subject: Resonant tunneling diodes
subject: Semiconductor diodes
subject: Semiconductor quantum dots
subject: Current voltage characteristics
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Magnetotunneling spectroscopy was employed to probe the confinement in vertical Si/Ge double-barrier resonant tunneling diodes with regularly distributed Ge quantum dots. Their current-voltage characteristics reveal a steplike behavior in the vicinity of zero bias, indicating resonant tunneling of heavy-holes via three-dimensionally confined unoccupied hole states in Ge quantum dots. Assuming parabolic confinement, we extract the strength of the confinement potential of quantum dots. © 2010 American Institute of Physics.
Dirichlet-Neumann inverse spectral problem for a star graph of Stieltjes strings
Creators: name: Pivovarchik, Vyacheslav
name: Rozhenko, Natalia
name: Tretter, Christiane
Publisher: name: arXiv
Year: 2013
Subjects: subject: Spectral Theory (math.SP)
subject: FOS: Mathematics
subject: 34A55, 39A70, 70F17, 70J30

description: We solve two inverse spectral problems for star graphs of Stieltjes strings with Dirichlet and Neumann boundary conditions, respectively, at a selected vertex called root. The root is either the central vertex or, in the more challenging problem, a pendant vertex of the star graph. At all other pendant vertices Dirichlet conditions are imposed; at the central vertex, at which a mass may be placed, continuity and Kirchhoff conditions are assumed. We derive conditions on two sets of real numbers to be the spectra of the above Dirichlet and Neumann problems. Our solution for the inverse problems is constructive: we establish algorithms to recover the mass distribution on the star graph (i.e. the point masses and lengths of subintervals between them) from these two spectra and from the lengths of the separate strings. If the root is a pendant vertex, the two spectra uniquely determine the parameters on the main string (i.e. the string incident to the root) if the length of the main string is known. The mass distribution on the other edges need not be unique; the reason for this is the non-uniqueness caused by the non-strict interlacing of the given data in the case when the root is the central vertex. Finally, we relate of our results to tree-patterned matrix inverse problems.
description: 32 pages, 3 figures
Quantum dots formed in a GaAsAlGaAs quantum ring
Creators: name: Mühle, A.
name: Wegscheider, W.
name: Haug, Rolf J.
Publisher: name: College Park, MD : American Institute of Physics
Year: 2008
Subjects: subject: Coulomb blockade
subject: Electric charge measurement
subject: Quantum chemistry
subject: Semiconducting gallium compounds
subject: Voltage measurement
subject: Aharonov Bohm oscillations
subject: Gate voltage regimes
subject: Quantum rings
subject: Spatial configuration
subject: Semiconductor quantum dots
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We demonstrate the tunability of a GaAsAlGaAs quantum ring showing coherent Aharonov-Bohm oscillations up to a gate voltage regime where the ring splits into three quantum dots. This is explained based on the structure's special confinement potential. We characterized the dots by analyzing the corresponding sets of Coulomb blockade lines. Additionally, the spatial configuration of the dots was confirmed by charge measurements using an adjacent quantum point contact. © 2008 American Institute of Physics.
title: Primary afferent input to neurons in laminae III and IV of the rat spinal cord which possess the neurokinin-1 (NK-1) receptor
Creators: name: Naim, Magda Mohamed
Publisher: name: University of Glasgow
Year: 1998
Subjects: subject: Neurosciences.

description: Neurokinin-1 receptor-immunoreactivity is present on many neurons in the spinal cord. A population of cells which possess the receptor is located in laminae III and IV and these cells have dorsal dendrites that penetrate the superficial laminae (I and II) of the dorsal horn. Since the dendrites of these neurons traverse several laminae, it has been suggested that they might receive input from different classes of primary afferents that terminate in these laminae. The present study investigated the input which these cells receive from two types of primary afferents: those which contain substance P (and are thought to function as nociceptors) and those with myelinated axons that terminate in laminae III-V (most of which are low-threshold mechanoreceptors). With the immunofluorescence technique and confocal microscopy, all neurons of this type were found to receive contacts from substance P-immunoreactive varicosities and in most cases the contacts onto dorsal dendrites were very numerous. The great majority of substance P-immunoreactive varicosities which formed contacts were also calcitonin gene- related peptide-immunoreactive, indicating that they were of primary afferent origin. Combined confocal and electron microscopy revealed that synapses were present at sites of contacts between substance P-immunoreactive primary afferent boutons and the dendrites of the NK-1 receptor-immunoreactive cells. Some neurons of this type belong to the spinothalamic tract and cells retrogradely-labelled after thalamic injection of cholera toxin B subunit, were therefore examined for the presence of contacts from substance P-immunoreactive axon terminals. The results indicated that the spinothalamic tract neurons which possess the NK-1 receptor and have dorsally directed dendrites also receive contacts from substance P-immunoreactive axonal varicosities onto their dorsal dendrites. By using the transganglionic transport technique, input from myelinated primary afferents which were labelled by injection of cholera toxin B subunit into the sciatic nerve were also examined. Dual-immunofluorescence and confocal microscopy revealed the presence of contacts between labelled primary afferent terminals and all of the NK-1 receptor-immunoreactive cells examined, however these contacts were much less numerous than those which the cells received from substance P-containing primary afferents. Electron microscopy revealed that synapses were present at some of the contacts between the myelinated afferents and the NK-1 receptor-immunoreactive neurons. Since cells of this type were found to receive monosynaptic input from two different classes of primary afferents, (a major input from substance P-containing afferents and a less dense input from myelinated primary afferents) it can be concluded that they are likely to have wide-dynamic-range receptive fields but with a relatively strong nociceptive component.
Ultrafast photodoping and effective Fermi-Dirac distribution of the Dirac particles in Bi2Se3
Creators: name: Crepaldi, A.
name: Ressel, B.
name: Cilento, F.
name: Zacchigna, M.
name: Grazioli, C.
name: Berger, H.
name: Bugnon, Ph.
name: Kern, K.
name: Grioni, M.
name: Parmigiani, F.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We exploit time- and angle- resolved photoemission spectroscopy to determine the evolution of the out-of-equilibrium electronic structure of the topological insulator Bi2Se. The response of the Fermi-Dirac distribution to ultrashort IR laser pulses has been studied by modelling the dynamics of the hot electrons after optical excitation. We disentangle a large increase of the effective temperature T* from a shift of the chemical potential mu*, which is consequence of the ultrafast photodoping of the conduction band. The relaxation dynamics of T* and mu* are k-independent and these two quantities uniquely define the evolution of the excited charge population. We observe that the energy dependence of the non-equilibrium charge population is solely determined by the analytical form of the effective Fermi-Dirac distribution.
description: 5 Pages, 3 Figures
Exciton fine structure and biexciton binding energy in single self-assembled InAs/AIAs quantum dots
Creators: name: Sarkar, D.
name: Van Der Meulen, H.P.
name: Calleja, J.M.
name: Becker, J.M.
name: Haug, Rolf J.
name: Pierz, Klaus
Publisher: name: College Park, MD : American Institute of Physics
Year: 2006
Subjects: subject: Binding energy
subject: Self assembly
subject: Semiconducting aluminum compounds
subject: Semiconducting indium compounds
subject: Semiconductor quantum dots
subject: Antibinding regime
subject: Biexciton binding energy
subject: Exciton fine structure
subject: Excitons
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: The exciton and biexciton emissions of a series of single quantum dots of InAs in an AlAs matrix have been studied. These emissions consist of linear cross polarized doublets showing large values of both the biexciton binding energy and the fine-structure splitting. At increasing exciton emission energy, corresponding to decreasing dot size, the biexciton binding energy of 9 meV decreases down to zero, reflecting a possible crossover to an antibinding regime. Simultaneously the fine-structure splitting diminishes from a value of 0.3 meV down to zero, at the same energy, suggesting a common origin for the two effects. © 2006 American Institute of Physics.
Phonons in InAs/AlAs single quantum dots observed by optical emission
Creators: name: Sarkar, D.
name: Van Der Meulen, H.P.
name: Calleja, J.M.
name: Becker, J.M.
name: Haug, Rolf J.
name: Pierz, Klaus
Publisher: name: College Park, MD : American Physical Society
Year: 2005
Subjects: subject: arsenic
subject: indium
subject: article
subject: conductance
subject: electron transport
subject: elementary particle
subject: energy
subject: excitation
subject: optics
subject: phonon
subject: photoluminescence
subject: quantum dot
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Photoluminescence emission spectra of self-assembled single InAs/AlAs quantum dots with variable size reveal typical sharp lines below 1.8 eV, corresponding to transitions between fully confined states. Above this energy the sharp peaks disappear due to the Γ-X scattering of conduction electrons. Excitation spectra of the biexciton line in single quantum dots show marked maxima at the optical-phonon frequency of the quantum dot and at its first overtone. The quantum dot phonon energy observed is 31 meV. Our results indicate an efficient polaron coupling in these quantum dots. © 2005 The American Physical Society.
MnSb2O6: A polar magnet with a chiral crystal structure
Creators: name: Johnson, R. D.
name: Cao, K.
name: Chapon, L. C.
name: Fabrizi, F.
name: Perks, N.
name: Manuel, P.
name: Yang, J. J.
name: Oh, Y. S.
name: Cheong, S-W.
name: Radaelli, P. G.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Structural and magnetic chiralities are found to coexist in a small group of materials in which they produce intriguing phenomenologies such as the recently discovered skyrmion phases. Here, we describe a previously unknown manifestation of this interplay in MnSb2O6, a trigonal oxide with a chiral crystal structure. Unlike all other known cases, the MnSb2O6 magnetic structure is based on co-rotating cycloids rather than helices. The coupling to the structural chirality is provided by a magnetic axial vector, related to the so-called vector chirality. We show that this unique arrangement is the magnetic ground state of the symmetric-exchange Hamiltonian, based on ab-initio theoretical calculations of the Heisenberg exchange interactions, and is stabilised by out-of-plane anisotropy. MnSb2O6 is predicted to be multiferroic with a unique ferroelectric switching mechanism.
description: Accepted for publication in Physical Review Letters
Antiprotons from dark matter annihilation in the Galaxy: Astrophysical uncertainties
Creators: name: Evoli, C.
name: Cholis, I.
name: Grasso, D.
name: Maccione, L.
name: Ullio, P.
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2012
Subjects: subject: 530
subject: dark matter: annihilation
subject: WIMP: dark matter
subject: dark matter: galaxy: halo
subject: anti-p: cosmic radiation
subject: AMS
subject: anti-p: energy spectrum
subject: cosmic radiation: flux
subject: cosmic radiation: propagation
subject: cosmic radiation: energy spectrum
subject: WIMP: mass
subject: dark matter: density
subject: cross section: annihilation
subject: p: flux
subject: anti-p: flux
subject: Wino: dark matter
subject: PAMELA
subject: dark matter: mass
subject: 95.35.+d
subject: cosmic rays
subject: elementary particles
subject: dark matter
subject: antiprotons

description: The latest years have seen steady progresses in WIMP dark matter (DM) searches, with hints of possible signals suggested by both direct and indirect detection experiments. Antiprotons can play a key role validating those interpretations since they are copiously produced by WIMP annihilations in the Galactic halo, and the secondary antiproton background produced by Cosmic Ray (CR) interactions is predicted with fair accuracy and matches the observed spectrum very well. Using the publicly available numerical DRAGON code, we reconsider antiprotons as a tool to constrain DM models discussing its power and limitations. We provide updated constraints on a wide class of annihilating DM models by comparing our predictions against the most up-to-date ap measurements, taking also into account the latest spectral information on the p, He and other CR nuclei fluxes. Doing that, we probe carefully the uncertainties associated to both secondary and DM originated antiprotons, by using a variety of distinctively different assumptions for the propagation of CRs and for the DM distribution in the Galaxy. We find that the impact of the astrophysical uncertainties on constraining the DM properties can be much stronger, up to a factor of ~50, than the one due to uncertainties on the DM distribution (~2-6). Remarkably, even reducing the uncertainties on the propagation parameters derived by local observables, non-local effects can still change DM model constraints even by 50%. Nevertheless, current ap data place tight constraints on DM models, excluding some of those suggested in connection with indirect and direct searches. Finally we discuss the power of upcoming CR spectral data from the AMS-02 observatory to drastically reduce the uncertainties discussed in this paper and estimate the expected sensitivity of this instrument to some sets of DM models.
Deliberate control over facial expressions in motherhood
Creators: name: Recio, Guillermo
name: Surdzhiyska, Yoanna
name: Bagherzadeh-Azbari, Shadi
name: Hilpert, Peter
name: Nowparast Rostami, Hadiseh
name: Xu, Qiang
name: Sommer, Werner
Publisher: name: Humboldt-Universität zu Berlin
Year: 2022
Subjects: subject: Facial expression
subject: Deliberate control
subject: Infant faces
subject: Motherhood
subject: Caretaking
subject: 150 Psychologie

description: The deliberate control of facial expressions is an important ability in human interactions, in particular for mothers with prelinguistic infants. Because research on this topic is still scarce, we investigated the control over facial expressions in a Stroop-like paradigm. Mothers of 2–6 months old infants and nullipara women produced smiles and frowns in response to verbal commands written on distractor faces of adults or infants showing expressions of happiness or anger/distress. Analyses of video recordings with a machine classifier for facial expression revealed pronounced effects of congruency between the expressions required by the participants and those displayed by the face stimuli on the onset latencies of the deliberate facial expressions. With adult distractor faces this Stroop effect was similar whether participants smiled or frowned. With infant distractor faces mothers and non-mothers showed indistinguishable Stroop effects on smile responses; however, for frown responses, the Stroop effect in mothers was smaller than in non-mothers. We suggest that for frown responses in mothers when facing infants, the effect of mimicry or stimulus response compatibility, leading to the Stroop effect, is offset by a caregiving response or empathy.
⚘ Navigating the Cybersemiotic Experience: From Deely to Brier ☀ Claudia Jacques
Creators: name: Jacques, Claudia
name: Vidales, Carlos
name: Berisha, Elma
Publisher: name: Instituto de Estudos Filosóficos
Year: 2022
Subjects: Art
Cybersemiotics
Experience
John Deely
Meta-environment
‪Søren Brier
Technoetics
Creativity

description: Step in... and you will walk through the transdisciplinary paths drawn from the fields of information, cognition, and communication.

This event, commented by Carlos Vidales (University of Guadalajara) and chaired by Elma Berisha (Lyceum Institute), is part of the activities of the 2022 International Open Seminar on Semiotics: a Tribute to John Deely on the Fifth Anniversary of His Passing, cooperatively organized by the Institute for Philosophical Studies of the Faculty of Arts and Humanities of the University of Coimbra, the Lyceum Institute, the Deely Project, Saint Vincent College, the Iranian Society for Phenomenology at the Iranian Political Science Association, the International Association for Semiotics of Space and Time, the Institute for Scientific Information on Social Sciences of the Russian Academy of Sciences, the Semiotic Society of America, the American Maritain Association, the International Association for Semiotic Studies, the International Society for Biosemiotic Studies, the International Center for Semiotics and Intercultural Dialogue, Moscow State Academic University for the Humanities and the Mansarda Acesa with the support of the FCT - Foundation for Science and Technology, I.P., of the Ministry of Science, Technology and Higher Education of the Government of Portugal under the UID/FIL/00010/2020 project.

***

Claudia Jacques de Moraes Cardoso (PhD, MFA) is a Brazilian-American interdisciplinary technoetic artist, designer, educator and researcher, based in New York. Her art and research focus is on Information in Human-Computer Interactions through the lens of Cybersemiotics. She teaches art and design, is a principal at Knowledge Art Studios, and serves as an academic editor for Technoetic Arts Journal and as art/web editor for Cybernetics & Human Knowing Journal.

***

Carlos Vidales is a Faculty Member of the Department of Social Communication Studies at the University of Guadalajara in Mexico. He is the author of several books, articles, and book chapters all related to semiotics and communication theory. He is a scholar of the International Communicology Institute, and the general coordinator of the undergraduate program in Public Communication at the University of Guadalajara. He is a member of the National Research System of the Mexican Council of Science and Technology. Managing Editor of the Journal Cybernetics and Human Knowing.

***

Homepage: https://www.uc.pt/fluc/uidief/act/io2s
Auditorium: https://www.uc.pt/fluc/uidief/act/io2s/auditorium

***

Technical support assured by Robert Junqueira.
The cover image for the video was designed by Zahra Soltani.
New Cosmological Solutions in Nonlocal Modified Gravity
Creators: name: Dimitrijevic, I.
name: Dragovich, B.
name: Grujic, J.
name: Rakic, Z.
Publisher: name: arXiv
Year: 2013
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider some cosmological aspects of nonlocal modified gravity with $Λ$ term, where nonlocality is of the type $R \mathcal{F}(\Box) R$. Using ansatz of the form $\Box R = r R +s,$ we find a few a(t) nonsingular bounce cosmological solutions for all three values of spatial curvature parameter k. We also discuss this modified gravity model from F(R) theory point of view.
description: 12 pages
Dark matter Search and the Scalar Quark Contents of the Nucleon.
Creators: name: Dinter, S.
name: Drach, V.
name: Jansen, K.
name: DESY
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2011
Subjects: subject: 530
subject: quark: mass: twist
subject: mass: twist
subject: quark: scalar
subject: fermion: mass: twist
subject: fermion: mass
subject: nucleon
subject: lattice field theory
subject: dark matter
subject: charm
subject: WIMP
subject: Lattice QCD
subject: Dark Matter
subject: Quark Content of the Nucleon

description: Singapore [u.a.] : World Scientific (2011).
description: We present lattice QCD simulation results from the European Twisted Mass Collaboration (ETMC) for the light, strange and charm quark contents of the nucleon. These quantities are important ingredients to estimate the cross-section for the detection of WIMPs as Dark Matter candidates. By employing a particular lattice QCD formulation, i.e. twisted mass fermions, accurate results of the light and strange scalar contents of the nucleon can be obtained. In addition, we provide a bound for the charm quark content of the nucleon.
description: Published by World Scientific, Singapore [u.a.]
Fueling conflict? (De)escalation and bilateral aid
Creators: name: Bluhm, Richard
name: Gassebner, Martin
name: Langlotz, Sarah
name: Schaudt, Paul
Publisher: name: Chichester [u.a.] : Wiley
Year: 2020
Subjects: subject: bilateral aid flows
subject: foreign aid
subject: fuel
subject: civil
subject: trade
subject: ethnicity
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie::330 | Wirtschaft

description: This paper studies the effects of bilateral foreign aid on conflict escalation and deescalation. First, we develop a new ordinal measure capturing the two-sided and multifaceted nature of conflict. Second, we propose a dynamic ordered probit estimator that allows for unobserved heterogeneity and corrects for endogeneity. Third, we identify the causal effect of foreign aid on conflict by predicting bilateral aid flows based on electoral outcomes of donor countries which are exogenous to recipients. Receiving bilateral aid raises the chances of escalating from small conflict to armed conflict, but we find little evidence that aid ignites conflict in truly peaceful countries. ¬© 2020 The Authors. Journal of Applied Econometrics published by John Wiley & Sons Ltd
Gate-tuned Differentiation of Surface-conducting States in Bi1.5Sb0.5Te1.7Se1.3 Topological-insulator Thin Crystals
Creators: name: Lee, Janghee
name: Park, Joonbum
name: Lee, Jae-Hyeong
name: Kim, Jun Sung
name: Lee, Hu-Jong
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Using field-angle, temperature, and back-gate-voltage dependence of the weak anti-localization (WAL) and universal conductance fluctuations of thin Bi1.5Sb0.5Te1.7Se1.3 topological-insulator single crystals, in combination with gate-tuned Hall resistivity measurements, we reliably separated the surface conduction of the topological nature from both the bulk conduction and topologically trivial surface conduction. We minimized the bulk conduction in the crystals and back-gate tuned the Fermi level to the topological bottom-surface band while keeping the top surface insensitive to back-gating with the optimal crystal thickness of ~?100 nm. We argue that the WAL effect occurring by the coherent diffusive motion of carriers in relatively low magnetic fields is more essential than other transport tools such as the Shubnikov-de Hass oscillations for confirming the conduction by the topologically protected surface state. Our approach provides a highly coherent picture of the surface transport properties of TIs and a reliable means of investigating the fundamental topological nature of surface conduction and possible quantum-device applications related to momentum-locked spin polarization in surface states.
description: 11 pages, 8 figures, accepted in PRB
title: Lust und Last - Leipziger Kunst seit 1945. Zum Konzept der Ausstellung im Germanischen Nationalmuseum Nürnberg vom 15.05.1997 bis 07.09.1997
Creators: name: Großmann, G. Ulrich
Publisher: name: University Library Heidelberg
Year: 2016

description: [nicht vorhanden / not available]
title: New Yorker Einkaufstüten zwischen Chinaporzellan und rheinischem Steinzeug. Paper Bags. Papierarbeiten von Annette Blocher vom 24. Juli bis 5. Oktober im Rittersaal des Germanischen Nationalmuseums
Creators: name: Eser, Thomas
Publisher: name: University Library Heidelberg
Year: 2016

description: [nicht vorhanden / not available]
Numerical simulations of the possible origin of the two sub-parsec scale and counter-rotating stellar disks around SgrA*
Creators: name: Alig, C.
name: Schartmann, M.
name: Burkert, A.
name: Dolag, K.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a high resolution simulation of an idealized model to explain the origin of the two young, counter-rotating, sub-parsec scale stellar disks around the supermassive black hole SgrA* at the Center of the Milky Way. In our model, the collision of a single molecular cloud with a circum-nuclear gas disk (similar to the one observed presently) leads to multiple streams of gas flowing towards the black hole and creating accretion disks with angular momentum depending on the ratio of cloud and circum-nuclear disk material. The infalling gas creates two inclined, counter-rotating sub-parsec scale accretion disks around the supermassive black hole with the first disk forming roughly 1 Myr earlier, allowing it to fragment into stars and get dispersed before the second, counter-rotating disk forms. Fragmentation of the second disk would lead to the two inclined, counter-rotating stellar disks which are observed at the Galactic Center. A similar event might be happening again right now at the Milky Way Galactic Center. Our model predicts that the collision event generates spiral-like filaments of gas, feeding the Galactic Center prior to disk formation with a geometry and inflow pattern that is in agreement with the structure of the so called mini-spiral that has been detected in the Galactic Center.
description: 14 pages, 12 figures, submitted to ApJ
Impurity effects in quantum dots: Toward quantitative modeling
Creators: name: Räsänen, E.
name: Könemann, J.
name: Haug, Rolf J.
name: Puska, M.J.
name: Nieminen, R.M.
Publisher: name: College Park, MD : American Physical Society
Year: 2004
Subjects: subject: aluminum derivative
subject: arsenic derivative
subject: gallium
subject: gallium arsenide
subject: acceleration
subject: article
subject: calculation
subject: density
subject: density functional theory
subject: device
subject: electron
subject: electron transport
subject: energy
subject: magnetic field
subject: mathematical analysis
subject: mathematical model
subject: measurement
subject: parameter
subject: quantitative analysis
subject: quantum mechanics
subject: spectrum
subject: technique
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We have studied the single-electron transport spectrum of a quantum dot in GaAs/AlGaAs resonant tunneling device. The measured spectrum has irregularities indicating a broken circular symmetry. We model the system with an external potential consisting of a parabolic confinement and a negatively charged Coulombic impurity placed in the vicinity of the quantum dot. The model leads to good agreement between the calculated single-electron eigenenergies and the experimental spectrum. Furthermore, we use the spin-density-functional theory to study the energies and angular momenta when the system contains many interacting electrons. In the high magnetic field regime the increasing electron number is shown to reduce the distortion induced by the impurity.
Energy dependence of quasiparticle relaxation in a disordered Fermi liquid
Creators: name: Schmidt, T.
name: König, P.
name: McCann, E.
name: Fal'ko, V.I.
name: Haug, Rolf J.
Publisher: name: College Park, MD : American Physical Society
Year: 2001
Subjects: subject: Current voltage characteristics
subject: Electron spectroscopy
subject: Fermi level
subject: Heterojunctions
subject: Magnetic fields
subject: Relaxation processes
subject: Semiconducting gallium compounds
subject: Statistical methods
subject: Temperature
subject: Alshuler-Aronov theory
subject: Excitation energy
subject: Local density of states
subject: Temperature dependence
subject: Fermi liquids
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Direct measurement of the energy dependence of the inelastic decay rate τ(E) of a quasiparticle state in a disordered conductor was performed using resonant tunneling spectroscopy. Decay rate was obtained from the analysis of the magnitude of disorder-induced fluctuations in the local density of states. Quantitative comparison with the standard theory was achieved.
title: Langer Blick empfohlen. Wertsachen. Eine Ausstellung der Klasse für Gold- und Silberschmiede der Akademie der Bildenden Künste Nürnberg vom 26. 06. bis 31. 08. 1997 im Germanischen Nationalmuseum
Creators: name: Eser, Thomas
Publisher: name: University Library Heidelberg
Year: 2016

description: [nicht vorhanden / not available]
Unitary equivalence of automorphisms of separable C*-algebras
Creators: name: Lupini, Martino
Publisher: name: arXiv
Year: 2013
Subjects: subject: Operator Algebras (math.OA)
subject: FOS: Mathematics

description: We prove that the automorphisms of any separable C*-algebra that does not have continuous trace are not classifiable by countable structures up to unitary equivalence. This implies a dichotomy for the Borel complexity of the relation of unitary equivalence of automorphisms of a separable unital C*-algebra: Such relation is either smooth or not even classifiable by countable structures.
description: Submitted for publication
Magnetoresistance anisotropy in Si/SiGe in tilted magnetic fields: Experimental evidence for a stripe-phase formation
Creators: name: Zeitler, U.
name: Schumacher, Hans W.
name: Jansen, A.G.M.
name: Haug, Rolf J.
Publisher: name: College Park, MD : American Physical Society
Year: 2001
Subjects: subject: Band structure
subject: Carrier mobility
subject: Electron transport properties
subject: Fermi level
subject: Magnetic anisotropy
subject: Magnetoresistance
subject: Molecular orientation
subject: Morphology
subject: Semiconducting silicon
subject: Semiconducting silicon compounds
subject: Landau levels
subject: Stripe-phase formation
subject: Heterojunctions
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: The anisotropies induced by an in-plane field in the magnetotransport properties of coinciding Landau levels in the two dimensional electron system of a silicon/silicon germanium (Si/SiGe) heterostructure were investigated. The anisotropies were caused by the formation of a unidirectional stripe phase from two Landau levels with opposite spin of electrons.
⚘The Semiosis of Boethius's Prosimetric Style in "De consolatione philosophiae" ☀ Wesley Chihyung Yu
Creators: name: Yu, Wesley Chihyung
name: Passarini, William
Publisher: name: Instituto de Estudos Filosóficos
Year: 2022
Subjects: De consolatione philosophiae
John Deely
Participation
Perception
Prosimetrum
Relations
Semiotics
Severinus Boethius
Summum bonum

description: Break forth... and jump into the interplay of triadic links found in the notable work bequeathed to us all by the progenitor of the Latin Aristotle.

This event, chaired by William Passarini (Mansarda Acesa), is part of the activities of the 2022 International Open Seminar on Semiotics: a Tribute to John Deely on the Fifth Anniversary of His Passing, cooperatively organized by the Institute for Philosophical Studies of the Faculty of Arts and Humanities of the University of Coimbra, the Lyceum Institute, the Deely Project, Saint Vincent College, the Iranian Society for Phenomenology at the Iranian Political Science Association, the International Association for Semiotics of Space and Time, the Institute for Scientific Information on Social Sciences of the Russian Academy of Sciences, the Semiotic Society of America, the American Maritain Association, the International Association for Semiotic Studies, the International Society for Biosemiotic Studies, the International Center for Semiotics and Intercultural Dialogue, Moscow State Academic University for the Humanities and the Mansarda Acesa with the support of the FCT - Foundation for Science and Technology, I.P., of the Ministry of Science, Technology and Higher Education of the Government of Portugal under the UID/FIL/00010/2020 project.

***

Wesley Chihyung Yu is Associate Professor of English at Mount Holyoke College. His interdisciplinary research on medieval poetics concentrates on literature’s relationship to the medieval language arts. Yu has focused in particular on rhetoric and logic, through which he considers medieval poetry’s place within the scope of intellectual history. He has written on early treatments of allegory and on literary uses of argumentation in the Middle Ages. Aside from teaching regular courses on medieval literary genres and authors, he writes and teaches on medieval perception and epistemology, poetic traditions, and reasoning in Old and Middle English literature.

***

Homepage: https://www.uc.pt/fluc/uidief/act/io2s
Auditorium: https://www.uc.pt/fluc/uidief/act/io2s/auditorium

***

Technical support assured by Robert Junqueira.
The cover image for the video was designed by Zahra Soltani.
Cosmic ray anisotropies to 5 PeV
Creators: name: Erlykin, A. D.
name: Wolfendale, A. W.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Several large cosmic ray (CR) detectors have recently provided data on the arrival directions of CR, which taken together with previous data recorded over many decades allow the amplitgude and phase of the first harmonic to be derived with reasonable precision and up to higher energies. We find a high degree of consistency amongst the various measurements. The new data indicate that at an energy above ~0.1 PeV a change of the CR anisotropy sets in. The amplitude of the first harmonic, which rises to 3 TeV, then diminishes and begins to rise again. The direction of the phase also changes to the opposite one. A measure of understanding follows from the use of two-dimensional maps of CR excesses over the mean background. When the energy of CR approaches the PeV region, the excess of CR moves from the Galactic Anti-Centre to the opposite direction of the Galactic Centre. The possible role of such potential CR sources as the supernovae Monogem Ring and Vela, which could help to explain some of the observed results, is discussed.
description: 16 pages, 5 figures, accepted for publication in JCAP
Parallel grid library for rapid and flexible simulation development
Creators: name: Honkonen, I.
name: von Alfthan, S.
name: Sandroos, A.
name: Janhunen, P.
name: Palmroth, M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Computational Physics (physics.comp-ph)
subject: Space Physics (physics.space-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: We present an easy to use and flexible grid library for developing highly scalable parallel simulations. The distributed cartesian cell-refinable grid (dccrg) supports adaptive mesh refinement and allows an arbitrary C++ class to be used as cell data. The amount of data in grid cells can vary both in space and time allowing dccrg to be used in very different types of simulations, for example in fluid and particle codes. Dccrg transfers the data between neighboring cells on different processes transparently and asynchronously allowing one to overlap computation and communication. This enables excellent scalability at least up to 32 k cores in magnetohydrodynamic tests depending on the problem and hardware. In the version of dccrg presented here part of the mesh metadata is replicated between MPI processes reducing the scalability of adaptive mesh refinement (AMR) to between 200 and 600 processes. Dccrg is free software that anyone can use, study and modify and is available at [https://gitorious.org/dccrg]. Users are also kindly requested to cite this work when publishing results obtained with dccrg.
description: Accepted to Computer Physics Communications, 36 pages, 13 figures
Fractures in complex fluids: the case of transient networks
Creators: name: Ligoure, Christian
name: Mora, Serge
Publisher: name: arXiv
Year: 2013
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We present a comprehensive review of the current state of fracture phenomena in transient networks, a wide class of viscoelastic fluids. We will first define what is a fracture in a complex fluid, and recall the main structural and rheological properties of transient networks. Secondly, we review experimental reports on fractures of transient networks in several configurations: shear-induced fractures, fractures in Hele-Shaw cells and fracture in extensional geometries (filament stretching rheometry and pendant drop experiments), including fracture propagation. The tentative extension of the concepts of brittleness and ductility to the fracture mechanisms in transient networks is also discussed. Finally, the different and apparently contradictory theoretical approaches developed to interpret fracture nucleation will be addressed and confronted to experimental results. Rationalized criteria to discriminate the relevance of these different models will be proposed.
description: Review; Rheologica Acta 2013 published on line
Ranunculus flammula
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: R. Flammula L. (R. Flammula ssp. eu-Flammula Syme, R. F. ssp. Flammula Hooker f., R. F. ssp. gemdmis [Buchenau] Rikli) Cat. 8 und 420. l: Plan du Sourd (Coquoz); Les Marecottes (J.). - 3: Champex (Miller).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Fabrication of a single-electron transistor by current-controlled local oxidation of a two-dimensional electron system
Creators: name: Keyser, U.F.
name: Schumacher, Hans W.
name: Zeitler, U.
name: Haug, Rolf J.
name: Eberl, K.
Publisher: name: College Park, MD : American Institute of Physics
Year: 2000
Subjects: subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: The surface layers of a GaAs/AlGaAs heterostructure are locally oxidized using an atomic force microscope. The local anodic oxidation depletes the underlying two-dimensional electron gas leading to the formation of tunneling barriers. The height of the barriers is determined by measuring the thermally activated current. By varying the oxidation current, the barrier heights can be tuned between a few meV and more than 100 meV. Using these barriers as tunneling elements, a side gated single-electron transistor is fabricated. © 2000 American Institute of Physics.