cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Handling handles. Part II. Stratification and data analysis
Creators: name: Bargheer, T.
name: Caetano, J.
name: Fleury, T.
name: Komatsu, S.
name: Vieira, P.
Publisher: name: Berlin : Springer
Year: 2018
Subjects: subject: 1/N Expansion
subject: AdS-CFT Correspondence
subject: Integrable Field Theories
subject: Supersymmetric Gauge Theory
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: In a previous work [1], we proposed an integrability setup for computing nonplanar corrections to correlation functions in N=4 super-Yang-Mills theory at any value of the coupling constant. The procedure consists of drawing all possible tree-level graphs on a Riemann surface of given genus, completing each graph to a triangulation, inserting a hexagon form factor into each face, and summing over a complete set of states on each edge of the triangulation. The summation over graphs can be interpreted as a quantization of the string moduli space integration. The quantization requires a careful treatment of the moduli space boundaries, which is realized by subtracting degenerate Riemann surfaces; this procedure is called stratification. In this work, we precisely formulate our proposal and perform several perturbative checks. These checks require hitherto unknown multi-particle mirror contributions at one loop, which we also compute.
Sonnenfleckenzeichnung Nr. 198.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 19.08.1991, 07:15, erstellt von Sergio Cortesi, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1991

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 3.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Crystal structure of (1S,2S,4S,5R)-2-hydroxymethyl-5-ethynyl-1-azabicyclo[ 2.2.2]octane, (HOCH2) (HC2)(C7H11N)
Creators: name: Wartchow, Rudolf
name: Schräke, O.
name: Braje, W.M.
name: Hoffmann, H.M.R.
Publisher: name: Berlin, Boston : De Gruyter
Year: 1999
Subjects: subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: [no abstract]
Theoretical formulation of Doppler redistribution in scattering polarization within the framework of the velocity-space density matrix formalism
Creators: name: Belluzzi, L.
name: Degl'Innocenti, E. Landi
name: Bueno, J. Trujillo
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Within the framework of the density matrix theory for the generation and transfer of polarized radiation, velocity density matrix correlations represent an important physical aspect that, however, is often neglected in practical applications by adopting the simplifying approximation of complete redistribution on velocity. In this paper, we present an application of the Non-LTE problem for polarized radiation taking such correlations into account through the velocity-space density matrix formalism. We consider a two-level atom with infinitely sharp upper and lower levels, and we derive the corresponding statistical equilibrium equations neglecting the contribution of velocity-changing collisions. Coupling such equations with the radiative transfer equations for polarized radiation, we derive a set of coupled equations for the velocity-dependent source function. This set of equations is then particularized to the case of a plane-parallel atmosphere. The equations presented in this paper provide a complete and solid description of the physics of pure Doppler redistribution, a phenomenon generally described within the framework of the redistribution matrix formalism. The redistribution matrix corresponding to this problem (generally referred to as R_I) is derived starting from the statistical equilibrium equations for the velocity-space density matrix and from the radiative transfer equations for polarized radiation, thus showing the equivalence of the two approaches.
description: Accepted for publication in Astronomy & Astrophysics
Fast and accurate sensitivity estimation for continuous-gravitational-wave searches
Creators: name: Dreissigacker, Christoph
name: Prix, Reinhard
name: Wette, Karl
Publisher: name: College Park : American Physical Society
Year: 2018
Subjects: subject: continuous-gravitational-wave detection
subject: gravitation
subject: binary-black-hole
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: This paper presents an efficient numerical sensitivity-estimation method and implementation for continuous-gravitational-wave searches, extending and generalizing an earlier analytic approach by Wette [1]. This estimation framework applies to a broad class of F-statistic-based search methods, namely (i) semi-coherent StackSlide F-statistic (single-stage and hierarchical multistage), (ii) Hough number count on F-statistics, as well as (iii) Bayesian upper limits on F-statistic search results (coherent or semi-coherent). We test this estimate against results from Monte-Carlo simulations assuming Gaussian noise. We find the agreement to be within a few % at high detection (i.e., low false-alarm) thresholds, with increasing deviations at decreasing detection (i.e., higher false-alarm) thresholds, which can be understood in terms of the approximations used in the estimate. We also provide an extensive summary of sensitivity depths achieved in past continuous-gravitational-wave searches (derived from the published upper limits). For the F-statistic-based searches where our sensitivity estimate is applicable, we find an average relative deviation to the published upper limits of less than 10%, which in most cases includes systematic uncertainty about the noise-floor estimate used in the published upper limits.
Sonnenfleckenzeichnung Nr. 240.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 08.10.1991, 09:00, erstellt von Sergio Cortesi, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1991

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 3.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Sonnenfleckenzeichnung Nr. 257.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 06.11.1991, 08:30, erstellt von Sergio Cortesi, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1991

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 3.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
title: Balneum, Horreum, Granarium – on the interpretation of a building in Rannersdorf (Styria)
Creators: name: Schrettle, Bernhard
Publisher: name: University Library Heidelberg
Year: 2016

description: Ausgrabungen im Südosten der Provinz Noricum erbrachten den außergewöhnlichen Grundriss eines axialsymmetrisch ausgerichteten Gebäudes mit zentralem Oktogon. Der Bau, der in seiner ersten Phase als Badeanlage zu deuten sein dürfte, wurde später zu einem Getreidespeicher umgebaut. Die Errichtung solcher Horrea in der Spätantike konnte bereits in mehreren Landgütern nachgewiesen werden, und eine Verbindung mit der annona militaris wurde vermutet. Für die Provinz Noricum stellt der Befund eine Besonderheit dar, da bisher noch keine vergleichbaren Anlagen bekannt waren – aber auch überregional gesehen stellt der Bau aufgrund des ungewöhnlichen Grundrisses ein bemerkenswertes Beispiel spätantiker Architektur in den Nordprovinzen dar.
description: An exceptional plan of a structure axially symmetrical with a central octagon was excavated in the South-East of the province Noricum. In its first phase the building can be interpreted most likely as a bath, later it was converted into a granary. For late Antiquity such horrea could be identified in several villas, and an association with the annona militaris was suggested. In Noricum this feature is special as no comparable structures are known so far. However, also supraregionally the unusual plan makes the building a remarkable example of late Roman architecture.
Role of noise and agents' convictions on opinion spreading in a three-state voter-like model
Creators: name: Crokidakis, Nuno
Publisher: name: arXiv
Year: 2013
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: In this work we study the opinion formation in a voter-like model defined on a square lattice of linear size $L$. The agents may be in three different states, representing any public debate with three choices (yes, no, undecided). We consider heterogeneous agents that have different convictions about their opinions. These convictions limit the capacity of persuasion of the individuals during the interactions. Moreover, there is a noise $p$ that represents the probability of an individual spontaneously change his opinion to the undecided state. Our simulations suggest that the system reaches stationary states for all values of $p$, with consensus states occurring only for the noiseless case $p=0$. In this case, the relaxation times are distributed according to a log-normal function, with the average value $τ$ growing with the lattice size as $τ\sim L^α$, where $α\approx$ 0.9. We found a threshold value $p^{*}\approx$ 0.9 above which the stationary fraction of undecided agents is greater than the fraction of decided ones. We also study the consequences of the presence of external effects in the system, which models the influence of mass media on opinion formation.
description: 15 pages, 6 figures, to appear in JSTAT
Measurement of the doubly-polarized He3→(γ→,n)pp reaction at 16.5 MeV and its implications for the GDH sum rule
Creators: name: Laskaris, G.
name: Yan, X.
name: Mueller, J.M.
name: Zimmerman, W.R.
name: Xiong, W.
name: Ahmed, M.W.
name: Averett, T.
name: Chu, P.-H.
name: Deltuva, A.
name: Flower, C.
name: Fonseca, A.C.
name: Gao, H.
name: Golak, J.
name: Heideman, J.N.
name: Karwowski, H.J.
name: Meziane, M.
name: Sauer, P.U.
name: Skibiński, R.
name: Strakovsky, I.I.
name: Weller, H.R.
name: Witała, H.
name: Wu, Y.K.
Publisher: name: Amsterdam : Elsevier
Year: 2015
Subjects: subject: GDH sum rule
subject: Polarized 3He
subject: Photoabsorption
subject: Polarization observables
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We report new measurements of the double-polarized photodisintegration of 3He at an incident photon energy of 16.5 MeV, carried out at the High Intensity γ-ray Source (HIγS) facility located at Triangle Universities Nuclear Laboratory (TUNL). The spin-dependent double-differential cross sections and the contribution from the three-body channel to the Gerasimov–Drell–Hearn (GDH) integrand were extracted and compared with the state-of-the-art three-body calculations. The calculations, which include the Coulomb interaction and are in good agreement with the results of previous measurements at 12.8 and 14.7 MeV, deviate from the new cross section results at 16.5 MeV. The GDH integrand was found to be about one standard deviation larger than the maximum value predicted by the theories.
Sonnenfleckenzeichnung Nr. 212.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 02.09.1991, 10:00, erstellt von Michele Bianda, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1991

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 3.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Sharp bounds in terms of the power of the contra-harmonic mean for Neuman-Sandor mean
Creators: name: Jiang, Wei-Dong
name: Qi, Feng
Publisher: name: arXiv
Year: 2013
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 26E60 (Primary), 26D05, 33B10 (Secondary)

description: In the paper, the authors obtain sharp bounds in terms of the power of the contra-harmonic mean for Neuman-Sándor mean.
description: 5 pages
Eriophorum latifolium L.
Creators: name: Becherer
Publisher: name: Zenodo
Year: 1956
Subjects: Biodiversity
Taxonomy

description: L. latifolium L. Cat. 32. BeiSittennoch1930 (Gyhr).
description: Published as part of Becherer, 1956, Florae Vallesiacae Supplementum, pp. 1-556 in Denkschriften der Schweizerischen Naturforschenden Gesellschaft 71 on pages 1-556
Sonnenfleckenzeichnung Nr. 266.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 18.11.1991, 08:00, erstellt von Sergio Cortesi, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1991

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 3.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
title: Einfluss von Informationskompetenz-Veranstaltungen auf die Qualität von Masterarbeiten
Creators: name: Seitz, Gary
name: Grossmann, Barbara
Publisher: name: University Library Heidelberg
Year: 2016

description: Am Geographischen Institut der Universität Zürich haben die Studierenden, welche als erster Jahrgang die IK-Veranstaltung als Pflichtmodul absolvierten, ihre Masterarbeit abgeschlossen. Mit einer quantitativen Auswertung wird untersucht, ob sich die Qualität der Quellen in den Masterarbeiten verbessert hat. Dazu werden die Literaturverzeichnisse einer bibliometrischen Analyse unterzogen. Anschliessend werden die erhaltenen Werte mit denjenigen verglichen, welche von Arbeiten ohne IK-Schulung erhoben wurden. Diese Methodik könnte ein Werkzeug darstellen, um Informationskompetenz-Veranstaltungen bezüglich ihrer Relevanz für wissenschaftliches Arbeiten evaluieren zu können.
description: Informationspraxis, Bd. 2, Nr. 1 (2016), Beginn und Erscheinungsfrequenz: Nummer: 1, Jahr: 2015, Ausgaben pro Band: 2, Bände pro Jahr: 1
Sonnenfleckenzeichnung Nr. 27.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 05.02.1991, 08:45, erstellt von Sergio Cortesi, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1991

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 2.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
High-Capacity, Dendrite-Free, and Ultrahigh-Rate Lithium-Metal Anodes Based on Monodisperse N-Doped Hollow Carbon Nanospheres
Creators: name: Liu, Yuping
name: Zhen, Yanzhong
name: Li, Taoran
name: Bettels, Frederik
name: He, Tao
name: Peng, Manhua
name: Liang, Yucang
name: Ding, Fei
name: Zhang, Lin
Publisher: name: Weinheim : Wiley-VCH
Year: 2020
Subjects: subject: Anodes
subject: Carbon
subject: Doping (additives)
subject: Hysteresis
subject: Iron compounds
subject: Lithium
subject: Lithium compounds
subject: Nanospheres
subject: Capacity retention
subject: Coulombic efficiency
subject: Critical challenges
subject: Electrode surfaces
subject: Hollow carbon nanospheres
subject: Lithium metal anode
subject: Rate capabilities
subject: Voltage hysteresis
subject: Lithium-ion batteries
subject: dendrite-free surface
subject: dense Li anode
subject: lithium metal anodes
subject: N-doped hollow carbon nanospheres
subject: ultrahigh rate
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: To unlock the great potential of lithium metal anodes for high-performance batteries, a number of critical challenges must be addressed. The uncontrolled dendrite growth and volume changes during cycling (especially, at high rates) will lead to short lifespan, low Coulombic efficiency (CE), and security risks of the batteries. Here it is reported that Li metal anodes, employing the monodisperse, lithiophilic, robust, and large-cavity N-doped hollow carbon nanospheres (NHCNSs) as the host, show remarkable performances—high areal capacity (10 mAh cm−2), high CE (up to 99.25% over 500 cycles), complete suppression of dendrite growth, dense packing of Li anode, and an extremely smooth electrode surface during repeated Li plating/stripping. In symmetric cells, a highly stable voltage hysteresis over a long cycling life >1200 h is achieved, and a low and stable voltage hysteresis can be realized even at an ultrahigh current density of 64 mA cm−2. Furthermore, the NHCNSs-based anodes, when paired with a LiFePO4 (LFP) cathode in full cells, give rise to highly improved rate capability (104 mAh g−1 at 10 C) and cycling stability (91.4% capacity retention for 200 cycles), enabling a promising candidate for the next-generation high energy/power density batteries.
Impact of Ag Pads on the Series Resistance of PERC Solar Cells
Creators: name: Schulte-Huxel, Henning
name: Witteck, Robert
name: Van Laak, Paula
name: Brendemühl, Till
name: Hinken, David
name: Bothe, Karsten
name: Brendel, Rolf
Publisher: name: London : Elsevier Ltd.
Year: 2016
Subjects: subject: laser fiered contacts
subject: laser welding
subject: module interconnection
subject: PERC solar cells
subject: Busbars
subject: Charge carriers
subject: Crystalline materials
subject: Electric resistance
subject: Finite element method
subject: Laser beam welding
subject: Screen printing
subject: Silicon
subject: Solar cells
subject: Charge carrier generation
subject: Dielectric layer
subject: Finite element simulations
subject: Majority charge carriers
subject: Module integration
subject: Series resistances
subject: Silver
subject: Konferenzschrift
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Screen-printed passivated emitter and rear cells (PERC) require Ag pads on the rear side to enable solderable connections for module integration. These Ag pads are separated from the silicon by a dielectric layer to avoid recombination of minority charge carriers. The drawback of this configuration is an elongated transport path for the majority charge carriers generated above the pads. This results in an increase in series resistance. The strength of this effect depends on charge carrier generation above the Ag pads that critically depends on shading of the cell's front side. Ag pads are usually wider than the busbars or the interconnector ribbons and thus are only partially shaded. We build PERC test structures with various rear side configurations of Ag and Al screen printing as well as with and without laser contact openings (LCO). Using experiments and finite element simulations we investigate the impact of shading the Ag pads by the busbars and other means. While fully shaded regions do not increase the lumped solar cell's series resistance, unshaded Ag pads lead to an increase of about 37%.
Sonnenfleckenzeichnung Nr. 31.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 09.02.1991, 08:45, erstellt von Sergio Cortesi, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1991

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 2.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
title: Zur Erwiderung Annegret Hobergs auf Berthold Hinz: »Vom Umgang mit den Spuren«
Creators: name: Bärnreuther, Andrea
Publisher: name: University Library Heidelberg
Year: 2016

description: kritische berichte - Zeitschrift für Kunst- und Kulturwissenschaften, Bd. 19, Nr. 4 (1991): kritische berichte, Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Multiple light scattering and near-field effects in a fractal tree-like ensamble of dielectric nanoparticles
Creators: name: Gerosa, Matteo
name: Bottani, Carlo Enrico
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We numerically study light scattering and absorption in self-similar aggregates of dielectric nanoparticles, as generated by simulated ballistic deposition upon a surface starting from a single seed particle. The resulting structure exhibits a complex tree-like shape, intended to mimic the morphologic properties of building blocks of real nanostructured thin films produced by means of fine controlled physical deposition processes employed in nanotechnology. The relationship of scattering and absorption cross sections to morphology is investigated within a computational scheme which thoroughly takes into account both multiple scattering and near-field effects. Numerical results are compared with a pre-existing single scattering limited analytical treatment of light scattering in fractal aggregates of small dielectric particles.
description: 10 pages, 9 figures. Accepted for publication in Physical Review B
Untitled
Creators: name: Nengudi, Senga, 1943-
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2019

description: Senga Nengudi's note affixed to Lillies of the Valley Unite!: Sample of my poetry as persona Lily Bea Moor, poetry references my way of working and my intallations Lilies of the Vally Unite! is a manifesto of sorts
A bright-rimmed cloud sculpted by the H ii region Sh2-48
Creators: name: Ortega, M. E.
name: Paron, S.
name: Giacani, E.
name: Rubio, M.
name: Dubner, G.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: To characterize a bright-rimmed cloud embedded in the HII region Sh2-48 searching for evidence of triggered star formation. We carried out observations towards a region of 2'x2' centered at RA=18h 22m 11.39s, dec.=-14deg 35m 24.81s (J2000) using the Atacama Submillimeter Telescope Experiment (ASTE; Chile) in the 12CO J=3-2,13CO J=3-2, HCO+ J=4-3, and CS J=7-6 lines with an angular resolution of about 22". We also present radio continuum observations at 5 GHz carried out with the Jansky Very Large Array (JVLA; EEUU) interferometer with a synthetized beam of 7"x5". The analysis of our molecular observations reveals the presence of a relatively dense clump with n(H_2)~3x10^3 cm^-3, located in projection onto the interior of the HII region Sh2-48. The emission distribution of the four observed molecular transitions has, at VLSR~38 kms^-1, morphological anti-correlation with the bright-rimmed cloud as seen in the optical emission. From the new radio continuum observations we identify a thin layer of ionized gas located at the border of the clump which is facing to the ionizing star. The ionized gas has an electron density of about 73 cm^-3 which supports the hypothesis that the clump is being photoionized by the nearby star, BD-14 5014. From the evaluation of the pressure balance between the ionized and molecular gas, we conclude that the clump would be in a pre-pressure balance state with the shocks being driven into the surface layer. Two YSO candidates (class I), are placed slightly beyond the bright rim suggesting that their formation could have been triggered via the radiation-driven implosion process.
description: Accepted for publication in Astronomy and Astrophysics
Identifying the location of recombination from voltage-dependent quantum efficiency measurements
Creators: name: Min, Byungsul
name: Kruse, Christian
name: Schinke, Carsten
name: Wolf, Martin
name: Müller, Matthias
name: Sträter, Hendrik
name: Wagner, Matthias
name: Bothe, Karsten
name: Brendel, Rolf
Publisher: name: London : Elsevier Ltd.
Year: 2017
Subjects: subject: open-circuit voltage
subject: PERC
subject: process monitoring
subject: quantum efficiency
subject: Efficiency
subject: Open circuit voltage
subject: Process monitoring
subject: Silicon wafers
subject: Solar cells
subject: Analysis method
subject: Czochralski wafers
subject: Device modelling
subject: Mass production
subject: Process-induced variation
subject: Quantum Efficiency measurements
subject: Short-circuit conditions
subject: Quantum efficiency
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie::330 | Wirtschaft::333 | Boden- und Energiewirtschaft::333,7 | Natürliche Ressourcen, Energie und Umwelt

description: This paper investigates process-induced variations of the open-circuit voltage (Voc) using voltage-dependent quantum efficiency measurements. By means of device modelling we show that this method is able to explain the Voc difference of two solar cells, even if they show identical electrical behaviour under short-circuit condition. This paper furthermore explains how the origin of Voc variations can be classified into emitter, base and rear of the solar cell. The simulation results have been experimentally verified with industrial-type passivated emitter and rear cells (PERC) cells made from p-type Czochralski wafers. The proposed analysis method is an attractive way for monitoring Voc variations of solar cells in industrial mass production since there is no need for specially prepared test structures. © 2017 The Authors. Published by Elsevier Ltd.
title: Überlegungen zum Spiegelmotiv im Narziss-Mythos
Creators: name: Gemmel, Mirko
Publisher: name: University Library Heidelberg
Year: 2016

description: kritische berichte - Zeitschrift für Kunst- und Kulturwissenschaften, Bd. 32, Nr. 2 (2004): kritische berichte, Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Sonnenfleckenzeichnung Nr. 5.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 06.01.1991, 10:00, erstellt von Andrea Manna, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1991

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 2.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Sonnenfleckenzeichnung Nr. 250.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 22.10.1991, 09:00, erstellt von Sergio Cortesi, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1991

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 3.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Lifetime Analysis for Defect Characterization in Kerfless Epitaxial Silicon from the Porous Silicon Process
Creators: name: Gemmel, Catherin
name: Hensen, Jan
name: Kajari-Schröder, Sarah
name: Brendel, Rolf
Publisher: name: London : Elsevier Ltd.
Year: 2016
Subjects: subject: kerfless
subject: lifetime
subject: mono-epitaxy
subject: Shockley-Read-Hall
subject: silicon
subject: symmetry factor
subject: Carrier lifetime
subject: Crystalline materials
subject: Defects
subject: Porous silicon
subject: Semiconducting silicon
subject: Defect characterization
subject: High-temperature processing
subject: Minority carrier lifetimes
subject: Shockley read halls
subject: Shockley-Read-Hall recombinations
subject: Symmetry factors
subject: Silicon wafers
subject: Konferenzschrift
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Kerfless epitaxial silicon from the porous silicon (PSI) process is a promising alternative for standard wafers. They allow the reduction of PV costs by combining high material quality at reduced production costs. We evaluate the minority carrier lifetime of p-type and n-type epitaxial silicon layers fabricated with the PSI process by means of photoconductance decay measurements. For p-type layers we observe a strong injection dependence of the lifetime that we attribute to bulk Shockley-Read-Hall (SRH) recombination. We determine two limiting defects K3.6 and K157 that describe the injection dependence of 9 samples grown in one batch. Defect K3.6 has a symmetry factor of k=3.6 and is similarly concentrated in all 9 investigated samples. Its concentration decreases upon high temperature processing with and without phosphorous diffusion. The defect K157 has a symmetry factor of k=157 and a higher concentration in samples with a higher porosity in the starting layer. As a consequence of the k-factors being larger than unity the identified defects are less detrimental in n-type silicon than p-type silicon. Accordingly, we fabricate n-type epitaxial layers for which we measure effective lifetimes up to 1330±130 μs at Δp = 1015 cm –3.
Unveiling the nature of the unidentified gamma-ray sources I: a new method for the association of gamma-ray blazars
Creators: name: D'Abrusco, R.
name: Massaro, F.
name: Paggi, A.
name: Masetti, N.
name: Tosti, G.
name: Giroletti, M.
name: Smith, H. A.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present a new method for identifying blazar candidates by examining the locus, i.e. the region occupied by the Fermi gamma-ray blazars in the three-dimensional color space defined by the WISE infrared colors. This method is a refinement of our previous approach that made use of the two-dimensional projection of the distribution of WISE gamma-ray emitting blazars (the Strip) in the three WISE color-color planes (Massaro et al. 2012a). In this paper, we define the three-dimensional locus by means of a Principal Component (PCs) analysis of the colors distribution of a large sample of blazars composed by all the ROMA-BZCAT sources with counterparts in the WISE All-Sky Catalog and associated to gamma-ray source in the second Fermi LAT catalog (the WISE Fermi Blazars sample, WFB). Our new procedure yields a total completeness of c~81% and total efficiency of e~97%. We also obtain local estimates of the efficiency and completeness as functions of the WISE colors and galactic coordinates of the candidate blazars. The catalog of all WISE candidate blazars associated to the WFB sample is also presented, complemented by archival multi-frequency information for the alternative associations. Finally, we apply the new association procedure to all gamma-ray blazars in the 2FGL and provide a catalog containing all the gamma-ray candidates blazars selected according to our procedure.
description: 24 pages, 10 figures, accepted for publication in ApJS, 2 tables
Transportation Planning in a Growing Community
Creators: name: Rhea, Carol
name: Stoogenke, Dana
name: Rhodes, Darren
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 2014

description: The Town of Red Cross - Past and Present: Red Cross was founded in the late 1700s and for nearly two hundred years life changed very little. Originally called “Red Crossing,” the Town owes its name to the rich red dirt of the Piedmont and the crossroads of what would eventually become N.C. 24/27 and N.C. 205. N.C. 24/27 remained unpaved until 1925, and N.C. 205 was not paved until 1941. Rolling farmland dotted by farmhouses dominated the landscape. A few small-scale farming-related businesses and industries served the area, and by the early 1900s, several small stores operated at the crossroads. Life and land use remained fairly constant until the latter part of the Twentieth Century.
The Politics of Planning: Where is North Carolina Heading?
Creators: name: Holman, Bill
Publisher: name: The University of North Carolina at Chapel Hill University Libraries
Year: 1990

description: In this article lobbyist Bill Holman argues for an expanded state role in land use planning and regulation. He provides an overview of statewide planning legislation adopted over the past decade in North Carolina and concludes that statewide planning is on the upsurge. Nevertheless, statewide planning issues are currently absent from North Carolina's political agenda. He charges environmentalists and planners to forge coalitions that will redress this situation.
Dancing Cubanía: aesthetics of elegance and cool in contemporary casino
Creators: name: Painter, Elizabeth Marie
Publisher: name: University of Limerick
Year: 2023
Subjects: Music

description: For more than 50 years the Cuban social dance casino has remained popular, and for many Cubans is an integral part of social life. My primary aim with this thesis is to examine the aesthetic differences embodied in contemporary Cuban casino across two dance venues as a way to gain some understanding of the multiplicity of Cuban cultural identities (Cubanía). This thesis focuses on themes of cultural identity, specifically Cubanía (Cubanness), aesthetic preferences, collective identities, and community creation. This thesis explores stylistic and aesthetic differences in casino across two different Havana dance communities. The analysis shows how casino can embody different elements of Cubanía, and despite the many differences across dance communities, shared core cultural values exist. An ethnochoreological approach is used and methods of both research and practice, observation and participation to analyze casino as danced by two distinct communities in Havana today. Ethnographic accounts of the two dance communities reveal distinct casino styles performed by individuals embodying differing habiti and culturally formed aesthetic preferences. The community at Casineando en Playa embodies a traditional style of casino and values an ‘aesthetic of elegance’. The working-class dancers at La Tropical embrace a fusion style of casino which incorporates Afro-Cuban popular dances and an ‘aesthetic of cool’. Despite aesthetic and stylistic differences across the two communities, shared values extend to include the importance of participation, competition, and an ideal state of flow in casino and in everyday life. Although these notions manifest in diverse ways across dance venues they simultaneously illustrate common core values in Cuban life thus forming an integrated understanding of the notion of Cubanía.This thesis is the first ethnographic account of Cuban casino. It captures a point in time in Havana social life from 2011-2014, just before the December 17, 2014 ‘thaw’ and initial steps towards a renewed relationship between Cuba and the United States after 54 years of hostility.
title: Das Atelier ist immer woanders. Über ein Paradox in Daniel Burens Praxis des in situ
Creators: name: Davidts, Wouter
Publisher: name: University Library Heidelberg
Year: 2016

description: kritische berichte - Zeitschrift für Kunst- und Kulturwissenschaften, Bd. 33, Nr. 3 (2005): kritische berichte, Beginn und Erscheinungsfrequenz: Ausgaben pro Band: 4
Recombination Behavior of Photolithography-free Back Junction Back Contact Solar Cells with Carrier-selective Polysilicon on Oxide Junctions for Both Polarities
Creators: name: Rienäcker, Michael
name: Merkle, Agnes
name: Römer, Udo
name: Kohlenberg, Heike
name: Krügener, Jan
name: Brendel, Rolf
name: Peibst, Robby
Publisher: name: London : Elsevier Ltd.
Year: 2016
Subjects: subject: back junction back contact solar cell
subject: pn junction
subject: POLO
subject: polysilicon on oxide junctions
subject: recombination
subject: trench isolation
subject: Crystalline materials
subject: Efficiency
subject: Ion implantation
subject: Open circuit voltage
subject: Photolithography
subject: Polycrystalline materials
subject: Polysilicon
subject: Silicon
subject: Solar cells
subject: Back contact
subject: Oxide junction
subject: Trench isolation
subject: Silicon solar cells
subject: Konferenzschrift
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We report on ion-implanted, inkjet patterned back junction back contact silicon solar cells with POLysilicon on Oxide (POLO) junctions for both polarities – n+ doped BSF and p+ doped emitter. The recombination behavior is investigated at two different processing stages: before and after trench separation of p+ and n+ regions within polysilicon (poly-Si). Before trench separation, we find a systematic dependence of the recombination behavior on the BSF index, i.e. the p+n+-junction meander length in the poly-Si. Obviously, recombination at the p+n+-junction in the poly-Si limits the implied open circuit voltage Voc,impl. at one sun illumination and the implied pseudo fill factor pFFimpl. to 695 mV and 80%, respectively. After trench isolation, however, Voc,impl (pFFimpl.) values increase up to 730 mV (85.5%), corresponding to a pseudo-efficiency of 26.2% for an assumed short circuit current density Jsc of 42 mA/cm2. We demonstrate a photolithography-free back junction back contacted solar cell with p-type and n-type POLO junctions with an in-house measured champion efficiency of 23.9% on a designated area of 3.97 cm2. This efficiency is mainly limited by the imperfect passivation in the undoped trench regions and at the undoped front side.
Comparison of force-free coronal magnetic field modeling using vector fields from Hinode and Solar Dynamics Observatory
Creators: name: Thalmann, J. K.
name: Tiwari, S. K.
name: Wiegelmann, T.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Photospheric magnetic vector maps from two different instruments are used to model the nonlinear force-free coronal magnetic field above an active region. We use vector maps inferred from polarization measurements of the Solar Dynamics Observatory/Helioseismic and Magnetic Imager (HMI) and the Solar Optical Telescope Spectropolarimeter (SP) aboard Hinode. Besides basing our model calculations on HMI data, we use both, SP data of original resolution and scaled down to the resolution of HMI. This allows us to compare the model results based on data from different instruments and to investigate how a binning of high-resolution data effects the model outcome. The resulting 3D magnetic fields are compared in terms of magnetic energy content and magnetic topology. We find stronger magnetic fields in the SP data, translating into a higher total magnetic energy of the SP models. The net Lorentz forces of the HMI and SP lower boundaries verify their force-free compatibility. We find substantial differences in the absolute estimates of the magnetic field energy but similar relative estimates, e.g., the fraction of excess energy and of the flux shared by distinct areas. The location and extension of neighboring connectivity domains differs and the SP model fields tend to be higher and more vertical. Hence, conclusions about the magnetic connectivity based on force-free field models are to be drawn with caution. We find that the deviations of the model solution when based on the lower-resolution SP data are small compared to the differences of the solutions based on data from different instruments.
description: 8 pages, 10 figures, APJ, accepted
Sonnenfleckenzeichnung Nr. 36.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 15.02.1991, 08:45, erstellt von Sergio Cortesi, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1991

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 3.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
A Joint Model of the X-ray And Infrared Extragalactic Backgrounds: I. Model Construction And First Results
Creators: name: Shi, Yong
name: Helou, George
name: Armus, Lee
name: Stierwalt, Sabrina
name: Dale, Daniel
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present an extragalactic population model of the cosmic background light to interpret the rich high-quality survey data in the X-ray and IR bands. The model incorporates star-formation and supermassive black hole (SMBH) accretion in a co-evolution scenario to fit simultaneously 617 data points of number counts, redshift distributions and local luminosity functions (LFs) with 19 free parameters. The model has four main components, the total IR LF, the SMBH accretion energy fraction in the IR band, the star-formation SED and the unobscured SMBH SED extinguished with a HI column density distribution. As a result of the observational uncertainties about the star-formation and SMBH SEDs, we present several variants of the model. The best-fit reduced chi^2 reaches as small as 2.7-2.9 of which a significant amount (>0.8) is contributed by cosmic variances or caveats associated with data. Compared to previous models, the unique result of this model is to constrain the SMBH energy fraction in the IR band that is found to increase with the IR luminosity but decrease with redshift up to z ~ 1.5; this result is separately verified using aromatic feature equivalent width data. The joint modelling of X-ray and mid-IR data allows for improved constraints on the obscured AGN, especially the Compton-thick AGN population. All variants of the model require that Compton-thick AGN fractions decrease with the SMBH luminosity but increase with redshift while the type-1 AGN fraction has the reverse trend.
description: 32 pages, 18 figures, ApJ in press. Online calculators are available at http://5muses.ipac.caltech.edu/5muses/EBL_model/index.html
Fecha de caducidad a los territorios indígenas en Brasil: un caso de ceguera ontológica
Creators: name: Gudynas, Eduardo
Publisher: name: Zenodo
Year: 2023
Subjects: política
indígenas
Brasil
territorios
ceguera ontológica

description: El proyecto de ley conocido como "marco temporal" considerado en Brasil, es un ejemplo de una ceguera ontológica. Conceptos propios de la política moderna empleados en ese debate, como reconocimiento o redistribución,no comprenden ni asumen que los pueblos indígenas también son sus territorios.