cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
TU intern: die Hochschulzeitung der Technischen Universität Berlin
Creators: name: (:Unkn) Unknown
Publisher: name: Technische Universität Berlin
Year: 2020
Subjects: subject: 000 Informatik, Informationswissenschaft, allgemeine Werke
subject: Hochschulzeitung
subject: Technische Universität
subject: TU Berlin

description: Die Hochschulzeitung "TU intern" berichtet sowohl über Aktuelles aus der Universität als auch über landes- und bundesweite Themen. Sie wendet sich an Mitglieder und Alumni der Universität sowie an Politik, Wirtschaft und Medien. Mit einem Paukenschlag endete das ohnehin extreme Jahr 2020 für die TU Berlin: Der Nachrichtentechniker und Humboldt-Professor Giuseppe Caire erhielt für seine revolutionären Entwicklungen zur drahtlosen Kommunikation den höchstdotierten deutschen Forschungspreis, den Gottfried Wilhelm Leibniz-Preis 2021. Und trotz Shutdown, Homeoffice und digitaler Lehre konnte die Universität einiges auf den Weg bringen, zum Beispiel die neue Zentraleinrichtung „3D-Tech“, die die 3D-Technologie-Expertise an der TU Berlin für die Produkte der Zukunft bündeln und in den Forschungsneubau IMoS ziehen soll. Dass gute Lehre keinen Karriereknick, sondern einen Schub geben soll und es entsprechende Anreize geben muss, dafür plädiert im Interview Professor Henning Meyer, der die AG Anreizsysteme leitet. Ausführlich berichtet die neue Ausgabe außerdem über die Ergebnisse von Befragungen von Lehrenden, Student*innen und „Sonstigen Mitarbeiter*innen“ zur Online-Lehre und zur Arbeitssituation. Ein Schwerpunkt liegt dieses Mal auch auf den Aktivitäten der Gesellschaft von Freunden der TU Berlin und der Unterstützung von Student*innen durch Alumni-Spenden für das Deutschlandstipendium. Natürlich kommt auch die Forschung nicht zu kurz: Dieses Mal geht es um wohnungslose Geflüchtete, um ein Projekt, in dem Verstrickungen von Deutscher Reichsbahn und TH Berlin in die Deportationslogistik der Nazis untersucht wurden sowie um den Einsatz der TU-Biochemiker*innen gegen virale Infektionen.
Intermediate-energy inverse-kinematics one-proton pickup reactions on neutron-deficient $fp$-shell nuclei
Creators: name: McDaniel, S.
name: Gade, A.
name: Tostevin, J. A.
name: Baugher, T.
name: Bazin, D.
name: Brown, B. A.
name: Cook, J. M.
name: Glasmacher, T.
name: Grinyer, G. F.
name: Ratkiewicz, A.
name: Weisshaar, D.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Background: Thick-target-induced nucleon-adding transfer reactions onto energetic rare-isotope beams are an emerging spectroscopic tool. Their sensitivity to single-particle structure complements one-nucleon removal reaction capabilities in the quest to reveal the evolution of nuclear shell structure in very exotic nuclei. Purpose: To add intermediate-energy, carbon-target-induced one-proton pickup reactions to the arsenal of $γ$-ray tagged direct reactions applicable in the regime of low beam intensities and to apply these for the first time to $fp$-shell nuclei. Methods: Inclusive and partial cross sections were measured for the $\nuc{12}{C}(\nuc{48}{Cr},\nuc{49}{Mn}+γ)$X and $\nuc{12}{C}(\nuc{50}{Fe},\nuc{51}{Co}+γ)$X proton pickup reactions at 56.7 and 61.2 MeV/nucleon, respectively, using coincident particle-$γ$ spectroscopy at the NSCL. The results are compared to reaction theory calculations using $fp$-shell-model nuclear structure input. For comparison with our previous work, the same reactions were measured on \nuc{9}{Be} targets. Results: The measured partial cross sections confirm the specific population pattern predicted by theory, with pickup into high-$\ell$ orbitals being strongly favored; driven by linear and angular momentum matching. Conclusion: Carbon target-induced pickup reactions are well-suited, in the regime of modest beam intensity, to study the evolution of nuclear structure, with specific sensitivities that are well described by theory.
description: 9 pages, 5 figures, Physical Review C, Final accepted version
Frame-dragging effects on magnetic fields near a rotating black hole
Creators: name: Karas, V.
name: Kopacek, O.
name: Kunneriath, D.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We discuss the role of general relativity frame dragging acting on magnetic field lines near a rotating (Kerr) black hole. Near ergosphere the magnetic structure becomes strongly influenced and magnetic null points can develop. We consider aligned magnetic fields as well as fields inclined with respect to the rotation axis, and the two cases are shown to behave in profoundly different ways. Further, we construct surfaces of equal values of local electric and magnetic intensities, which have not yet been discussed in the full generality of a boosted rotating black hole.
description: to appear in the proceedings of "The Central Kiloparsec in Galactic Nuclei (AHAR 2011)", Journal of Physics: Conference Series (JPCS), IOP Publishing
best bridal makeup services in Ludhiana
Creators: name: Oyester
Publisher: name: Zenodo
Year: 2021

description: We are beauty professionals at Oyester. We provide all sorts of beauty services to our clients. Oyester is also one of the best permanent hair extension salon in Ludhiana and we also provide other beauty services like best bridal makeup Studio in Ludhiana. Check our other services out too:
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Identification of gamma-ray emission from 3C345 and NRAO512
Creators: name: Schinzel, F. K.
name: Sokolovsky, K. V.
name: D'Ammando, F.
name: Burnett, T. H.
name: Max-Moerbeck, W.
name: Cheung, C. C.
name: Fegan, S. J.
name: Casandjian, J. M.
name: Reyes, L. C.
name: Villata, M.
name: Raiteri, C. M.
name: Agudo, I.
name: Calle, O. J. A. Bravo
name: Carosati, D.
name: Casas, R.
name: Gomez, J. L.
name: Gurwell, M. A.
name: Hsiao, H. Y.
name: Jorstad, S. G.
name: Kimeridze, G.
name: Konstantinova, T. S.
name: Kopatskaya, E. N.
name: Koptelova, E.
name: Kurtanidze, O. M.
name: Kurtanidze, S. O.
name: Larionov, V. M.
name: Larionova, E. G.
name: Larionova, L. V.
name: Marscher, A. P.
name: Morozova, D. A.
name: Nikolashvili, M. G.
name: Roca-Sogorb, M.
name: Ros, J. A.
name: Sigua, L. A.
name: Spiridonova, O.
name: Troitsky, I. S.
name: Vlasyuk, V. V.
name: Lobanov, A. P.
name: Zensus, J. A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: For more than 15 years, since the days of the Energetic Gamma-Ray Experiment Telescope (EGRET) on board the Compton Gamma-Ray Observatory (CGRO; 1991-2000), it has remained an open question why the prominent blazar 3C 345 was not reliably detected at gamma-ray energies <=20 MeV. Recently a bright gamma-ray source (0FGL J1641.4+3939/1FGL J1642.5+3947), potentially associated with 3C 345, was detected by the Large Area Telescope (LAT) on Fermi. Multiwavelength observations from radio bands to X-rays (mainly GASP-WEBT and Swift) of possible counterparts (3C 345, NRAO 512, B3 1640+396) were combined with 20 months of Fermi-LAT monitoring data (August 2008 - April 2010) to associate and identify the dominating gamma-ray emitting counterpart of 1FGL J1642.5+3947. The source 3C 345 is identified as the main contributor for this gamma-ray emitting region. However, after November 2009 (15 months), a significant excess of photons from the nearby quasar NRAO 512 started to contribute and thereafter was detected with increasing gamma-ray activity, possibly adding flux to 1FGL J1642.5+3947. For the same time period and during the summer of 2010, an increase of radio, optical and X-ray activity of NRAO 512 was observed. No gamma-ray emission from B3 1640+396 was detected.
description: 11 pages, 5 figures, 5 tables, accepted for publication in A&A
Poncelet theorems
Creators: name: Barth, W.
name: Bauer, Th.
Publisher: name: arXiv
Year: 1995
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: If there is one polygon inscribed into some smooth conic and circumscribed about another one, then there are infinitely many such polygons. This is Poncelet's theorem. The aim of this note is to collect some (mostly classical) versions of this theorem, namely:
 - Weyr's Poncelet theorem in $P_3$ (1870),
 - Emch's theorem on circular series (1901),
 - Gerbaldi's formula for the number of Poncelet pairs (1919),
 - the Money-Coutts theorem on three circles (1971),
 - the zig-zag theorem (1974),
 - a (probably new) Poncelet theorem on three conics,
 - a Poncelet formula for quadrics of revolution.
description: 20 pages, LaTeX
Somos inmortales
Creators: name: Ortega Ortega, Jairo Hernán
Publisher: name: Universidad del Rosario
Year: 2015

description: Desde la primera vez que devoré la novela concluí que, en el fondo, se trataba de una historia de amor más allá de la muerte y sospeché que el conde Drácula padecía algún trastorno hematológico que lo llevaba a amenizarse, por lo cual requería sangre, o sea, una transfusión. Pero en la Inglaterra Victoriana de  fines  del  siglo  XIX  aún  no  se  conocían los  dispositivos que  hoy  utilizamos para transfundir sangre; por lo tanto, Drácula ideó un método propio, original y erótico. No  solo  de  vampiros  se  nutre  nuestro tema, también de santos como Cosme y Damián. Dos hermanos gemelos que ejercían la medicina en el siglo III d. C., sin cobrar. Fueron perseguidos, torturados y  decapitados por  orden del emperador Diocleciano.  Podemos observarlos, haciendo el  “trasplante” de  una  pierna, en  un famoso óleo del siglo XV denominado “El sueño de un sacristán”, atribuido al llamado Maestro de los Balbases.
The Role of Galaxy Interaction in Environmental Dependence of the Star Formation Activity at z~1.2
Creators: name: Ideue, Yuko
name: Taniguchi, Yoshiaki
name: Nagao, Tohru
name: Shioya, Yasuhiro
name: Kajisawa, Masaru
name: Trump, Jonathan R.
name: Vergani, Daniela
name: Iovino, Angela
name: Koekemoer, Anton M.
name: Fevre, Olivier Le
name: Ilbert, Olivier
name: Scoville, Nick
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: In order to understand environmental effects on star formation in high-redshift galaxies, we investigate the physical relationships between the star formation activity, stellar mass, and environment for z ~1.2 galaxies in the 2 deg^2 COSMOS field. We estimate star formation using the [OII] emission line and environment from the local galaxy density. Our analysis shows that for massive galaxies M_*>10^10 M_sun, the fraction of [OII] emitters in high-density environments is 1.7 times higher than in low-density environments, while the [OII] emitter fraction does not depend on environment for low-mass M_* < 10^10 M_sun galaxies. In order to understand what drives these trends, we investigate the role of companion galaxies in our sample. We find that the fraction of [OII] emitters in galaxies with companions is 2.4 times as high as that in galaxies without companions at M_* > 10^10 M_sun. In addition, massive galaxies are more likely to have companions in high-density environments. However, although the "number" of star forming galaxies increases for massive galaxies with close companions and in dense environments, the "average" star formation rate of star forming galaxies at a given mass is independent of environment and the presence/absence of a close companion. These results suggest that interactions and/or mergers in high-density environment could induce star formation in massive galaxies at z~1.2, increasing the fraction of star-forming galaxies with M_* > 10^10 M_sun.
description: 10 pages, 8 figures; accepted for publication in ApJ
Arnaud Fossier, Le bureau des âmes. Écritures et pratiques administratives de la Pénitencerie apostolique (XIIIe–XIVe siècle), Roma (École française de Rome) 2018
Creators: name: Doublier, Étienne
Publisher: name: Francia-Recensio
Year: 2020

description: Arnaud Fossier, Le bureau des âmes. Écritures et pratiques administratives de la Pénitencerie apostolique (XIIIe–XIVe siècle), Roma (École française de Rome) 2018, 648 p. (Bibliothèque des Écoles françaises d’Athènes et de Rome, 378), ISBN 978-2-7283-1286-3, EUR 39,00.
description: Francia-Recensio, 2020/2
Master actions for linearized massive gravity models in 3-D
Creators: name: Arias, Pio J.
name: Khoudeir, Adel
name: Stephany, J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present a unified analysis of the self-dual, second order, topologically massive and the recently introduced fourth order models of massive gravity in 3D. We show that there is a family of first order actions which interpolate between these different single excitation models. We show how the master actions are related by duality transformation. We construct by the same method the master action which relates the fourth order new massive model with two excitations and the usual second order model with Fierz-Pauli mass. We show that the more general model obtained by adding a Chern-Simons term to the new massive model is equivalent off shell to the second order spontaneously broken linearized massive gravity.
description: 16 pages, 2 figures
Karen Hagemann, Umkämpftes Gedächtnis. Die Antinapoleonischen Kriege in der deutschen Erinnerung, Paderborn (Ferdinand Schöningh) 2019
Creators: name: Eckert, Georg
Publisher: name: Francia-Recensio
Year: 2020

description: Karen Hagemann, Umkämpftes Gedächtnis. Die Antinapoleonischen Kriege in der deutschen Erinnerung, Paderborn (Ferdinand Schöningh) 2019, XVI–427 S., 3 farb. Abb. (Die Revolutions- und Napoleonischen Kriege in der Europäischen Erinnerung), ISBN 978-3-506-70748-2, EUR 99,00.
description: Francia-Recensio, 2020/2
Martina Steber, Die Hüter der Begriffe. Politische Sprachen des Konservativen in Großbritannien und der Bundesrepublik Deutschland, 1945–1980, München (De Gruyter Oldenbourg) 2017
Creators: name: Großmann, Johannes
Publisher: name: Francia-Recensio
Year: 2020

description: Martina Steber, Die Hüter der Begriffe. Politische Sprachen des Konservativen in Großbritannien und der Bundesrepublik Deutschland, 1945–1980, München (De Gruyter Oldenbourg) 2017, XII–522 S. (Veröffentlichungen des Deutschen Historischen Instituts London/Publications of the German Historical Institute London, 78), ISBN 978-3-11-046361-3, EUR 64,95.
description: Francia-Recensio, 2020/2
Gravitationally Induced Density Wake of a Circularly Orbiting Object As an Interpretative Framework of Ubiquitous Spirals and Arcs
Creators: name: Kim, Hyosun
Publisher: name: arXiv
Year: 2011
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: An orbiting object in a gas rich environment creates a gravitational density wake containing information about the object and its orbit. Using linear perturbation theory, we analyze the observable properties of the gravitational wake due to the object circularly moving in a static homogeneous gaseous medium, in order to derive the Bondi accretion radius $r_B$, the orbital distance $r_p$, and the Mach number of the object. Supersonic motion, producing a wake of spiral-onion shell structure, exhibits a single-armed Archimedes spiral and two-centered circular arcs with respect to the line of sight. The pitch angle, arm width, and spacing of the spiral pattern are entirely determined by the orbital distance $r_p$ and Mach number of the object. The arm-interarm density contrast is proportional to the Bondi accretion radius, decreasing as a function of distance with a power index of -1. The background density distribution is globally changed from initially uniform to centrally concentrated. The vertical structure of the wake is manifested as circular arcs with the center at the object location. The angular extent of the arcs is determined by the Mach number of the object motion. Diagnostic probes of nonlinear wakes such as a detached bow shock, an absence of the definite inner arm boundary, the presence of turbulent low density eddies, and elongated shapes of arcs are explained in the extension of the linear analysis. The density enhancement at the center is always $r_B/r_p$ independent of the nonlinearity, suggesting that massive objects can substantially modify the background distribution. These detailed understanding of the wake characteristics will provide an interpretative framework for both further theoretical works under more complicated situations and future observations to detect the gravitational wakes of hidden objects.
description: 28 pages, 8 figures, accepted for publication in Astrophysical Journal
Seshadri constants on algebraic surfaces
Creators: name: Bauer, Thomas
Publisher: name: arXiv
Year: 1999
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: Seshadri constants are local invariants, introduced by Demailly, which measure the local positivity of ample line bundles. Recent interest in Seshadri constants stems on the one hand from the fact that bounds on Seshadri constants yield, via vanishing theorems, bounds on the number of points and jets that adjoint linear series separate. On the other hand it has become increasingly clear by now that Seshadri constants are highly interesting invariants quite in their own right. Except in the simplest cases, however, they are already in the case of surfaces very hard to control or to compute explicitly---hardly any explicit values of Seshadri constants are known so far. The purpose of the present paper is to study these invariants on algebraic surfaces. On the one hand, we prove a number of explicit bounds for Seshadri constants and Seshadri submaximal curves, and on the other hand, we give complete results for abelian surfaces of Picard number one. A nice feature of this result is that it allows to explicitly compute the Seshadri constants---as well as the unique irreducible curve that accounts for it---for a whole class of surfaces. It also shows that Seshadri constants have an intriguing number-theoretic flavor in this case.
description: LaTeX2e, 35 pages. Math. Ann. (to appear)
Vorwort
Creators: name: Funke, Joachim
name: Wink, Michael
Publisher: name: Heidelberger Jahrbücher Online
Year: 2020

description: Wir schildern das Konzept der Reihe und geben einen kurzen Überblick über die einzelnen Kapitel.
description: Heidelberger Jahrbücher Online, Bd. 5 (2020): Entwicklung – Wie aus Prozessen Strukturen werden
Hitokiri
Creators: name: Quintero, Juan Pablo
Publisher: name: Universidad del Rosario
Year: 2015

description: Durante la  Edad Antigua (593  -  1185)  se consolidó en  Japón un  linaje  de  emperadores conocido como Mikado, el   Trono del Crisantemo, que  organizó a  la  población en clanes según el  código de  leyes del confucianismo. Para el siglo IX, varios clanes ya se habían consolidado como grupos guerreros que lograron permanecer relativamente independientes de Kioto, la capital, desde donde se  administraba el  imperio. Los  líderes guerreros, shogunes, adquirieron cada vez más fuerza hasta que, en 1185, el general Minamotono  Yoritomo, sacando de  contienda a  sus enemigos de otros clanes, logró hacerse con el control del  ejército imperial. Se  crea  así  el primer shogunato en Japón, un gobierno feudal, militar y político con sede en Kamakura. Desde entonces, los distintos clanes, a lo largo de gran parte  del  territorio nipón, comienzan a  fraguar todo tipo de estrategias y alianzas para llegar al poder y sus líderes luchan por obtener el preciado título de Shogun. Mientras tanto en Kioto, el linaje imperial quedaba relegado al ejercicio del poder espiritual.
Regularizing made-to-measure particle models of galaxies
Creators: name: Morganti, Lucia
name: Gerhard, Ortwin
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Made-to-measure methods such as the parallel code NMAGIC are powerful tools to build galaxy models reproducing observational data. They work by adapting the particle weights in an N-body system until the target observables are well matched. Here we introduce a moving prior regularization (MPR) method for such particle models. It is based on determining from the particles a distribution of priors in phase-space, which are updated in parallel with the weight adaptation. This method allows one to construct smooth models from noisy data without erasing global phase-space gradients. We first apply MPR to a spherical system for which the distribution function can in theory be uniquely recovered from idealized data. We show that NMAGIC with MPR indeed converges to the true solution with very good accuracy, independent of the initial particle model. Compared to the standard weight entropy regularization, biases in the anisotropy structure are removed and local fluctuations in the intrinsic distribution function are reduced. We then investigate how the uncertainties in the inferred dynamical structure increase with less complete and noisier kinematic data, and how the dependence on the initial particle model also increases. Finally, we apply the MPR technique to the two intermediate-luminosity elliptical galaxies NGC 4697 and NGC 3379, obtaining smoother dynamical models in luminous and dark matter potentials.
description: 16 pages, 15 figures, 2 tables. Accepted for publication in MNRAS
Lossless Digital Image Compression Method for Bitmap Images
Creators: name: Meyyappan, Dr. T.
name: Thamarai, SM.
name: Nachiaban, N. M. Jeya
Publisher: name: arXiv
Year: 2011
Subjects: subject: Multimedia (cs.MM)
subject: FOS: Computer and information sciences
subject: 65D18

description: In this research paper, the authors propose a new approach to digital image compression using crack coding This method starts with the original image and develop crack codes in a recursive manner, marking the pixels visited earlier and expanding the entropy in four directions. The proposed method is experimented with sample bitmap images and results are tabulated. The method is implemented in uni-processor machine using C language source code.
description: 10 pages, 7 figures, presented in First International Conference on Digital Image Processing and Pattern Recognition (DPPR-2011)In conjunction with (CCSEIT-2011), Manonmaniam Sundharanar University, September 23~25, 2011, Tirunelveli, Tamil Nadu, India
Fehlentwicklungen in der Bibelwissenschaft (Altes Testament): Eine sich kontinuierlich selbst falsifizierende Disziplin
Creators: name: Diebner, Bernd J.
Publisher: name: Heidelberger Jahrbücher Online
Year: 2020

description: Die Geschichte der historisch-kritischen Erforschung des Alten Testamentes in den letzten drei Jahrhunderten bewegt sich im Spannungsfeld von kirchenamtlichen und fundamentalistischen Gemeinde-Dogmen und für ,ohne Zweifel’ als ,sicher’ geltenden Forschungs-Dogmen, die seit Jahrhunderten von neuen und einander widersprechenden ,ohne Zweifel gesicherten’ Forschungsdogmen abgelöst werden. Es ist ein von Hypothesen geprägter circulus vitiosus academicus. Falsifizierungen sind kaum von häufigen Paradigmenwechseln zu unterscheiden. Oft tritt dabei der Sprachgestus an die Stelle von (fehlenden) Sach-Argumenten.
description: Heidelberger Jahrbücher Online, Bd. 5 (2020): Entwicklung – Wie aus Prozessen Strukturen werden
The Problem of Colliding Networks and its Relation to Cancer
Creators: name: Koulakov, Alexei A.
name: Lazebnik, Yuri
Publisher: name: arXiv
Year: 2012
Subjects: subject: Molecular Networks (q-bio.MN)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Complex systems, ranging from living cells to human societies, can be represented as attractor networks, whose basic property is to exist in one of allowed states, or attractors. We noted that merging two systems that are in distinct attractors creates uncertainty, as the hybrid system cannot assume two attractors at once. As a prototype of this problem, we explore cell fusion, whose ability to combine distinct cells into hybrids was proposed to cause cancer. By simulating cell types as attractors, we find that hybrids are prone to assume spurious attractors, which are emergent and sporadic states of networks, and propose that cell fusion can make a cell cancerous by placing it into normally inaccessible spurious states. We define basic features of hybrid networks and suggest that the problem of colliding networks has general significance in processes represented by attractor networks, including biological, social, and political phenomena.
El dilema del tritio
Creators: name: Guzmán Hennessey, Manuel
Publisher: name: Universidad del Rosario
Year: 2022

description: El físico neozelandés Ernest Rutherford descubrió el tritio, un material asaz raro entre la química, como que es isótopo del hidrógeno y como tal, ‘primo hermano’ del deuterio, otra rareza. Y como además es bastante escaso en la naturaleza, poco sabíamos de él hasta que Rutherford se lo encontró mientras estudiaba la radiactividad. Hizo entonces una carambola tan genial que descubrió dos cosas sobre las cuáles hoy podríamos cifrar la salvación de la vida sobre el planeta. La primera fue las propiedades del tritio y la segunda que los átomos podían desintegrarse. Entonces los físicos Atkinson y Houtermans descubrieron la energía nuclear de fusión. Que desde 1942 tomó impulso con E. Fermi y R, Oppenheimer, mas no para fines tan inocuos como aquel que encontró Frank Libby: saber la edad de los vinos. Pues bien, a propósito del tritio, yo tengo cuatro razones y un principio de legitimidad ética para abogar en favor de él. Y pedir que se forme, cuanto antes, un movimiento ambientalista global que considere la necesidad de acelerar la investigación científica sobre la energía nuclear de fusión
Entwicklungen in der Entwicklung – Fortwährende Veränderungen im Fluss der Organismenwelt
Creators: name: Erbar, Claudia
name: Leins, Peter
Publisher: name: Heidelberger Jahrbücher Online
Year: 2020

description: „Die reinste Anschauung der Dinge hat, wer sie vom Anbeginn her wachsen sieht“ (Aristoteles 384 v. Chr. – 322 v. Chr.). Dieser Erkenntnis folgend werden Beispiele aus dem Blütenbereich der Angiospermae (Blütenpflanzen) in dem vorliegenden Artikel vorgestellt. Ähnlich aussehende Strukturen, wie etwa die multistaminaten (aus vielen Staubgefäßen bestehenden) Androeceen in den Blüten unterschiedlicher Verwandtschaftsgruppen oder Blumenkronröhren, die insbesondere im oberen Stammbaumniveau zu finden sind, können sich auf vielfältige Weise entwickeln. Durch Vergleich verschieden alter Stadien machen sich die „individuellen“ Entwicklungsweisen beobachtbar; wir nennen sie Ontogenien. Demgegenüber sind Stammbäume nicht beobachtbare Rekonstruktionen der historischen Verwandtschaft von Lebewesen. Eine stammesgeschichtliche Entwicklung, die Phylogenie, ist also stets Theorie behaftet. Um die Plausibilität einer Stammbaumrekonstruktion zu erhöhen, bedient man sich der evolutionären Erkenntnis, d. h. wir können uns auf die (wiederum beobachtbaren) Faktoren der Evolution (Mutation, Rekombination, Migration, Isolation und Selektion) verlassen. Jede Veränderung in der Phylogenie macht sich in irgendeinem Entwicklungsstadium einer Ontogenie bemerkbar, letztlich durch eine genetische Veränderung verursacht. Zimmermann (1934) bringt in dem Begriff der Hologenie beide Entwicklungen zusammen: Hologenie ist eine Aneinanderreihung von (unzähligen) Ontogenien in einer Phylogenie. Entwicklungen bedeuten Veränderungen und Bewegungen in einer bestimmten Zeiteinheit. Zum Teil können Entwicklungen unmittelbar in eine Funktion verwickelt sein. Beispiele finden sich sehr häufig in der Pollenportionierung, einem außerordentlich wichtigen ökonomischen Verhalten der Blüten im Umgang mit den Pollenkörnern. Die Mechanismen sind unterschiedlich. Entwicklungen, Veränderungen, Bewegungen sowohl des Lebewesens als auch in demselben und außerhalb seines Körpers, nämlich in den Ökosystemen, halten Alles im Fluss; panta rhei, Heraklit von Ephesos, etwa 500 v. Chr.
description: Heidelberger Jahrbücher Online, Bd. 5 (2020): Entwicklung – Wie aus Prozessen Strukturen werden
Deep Absorption Line Studies of Quiescent Galaxies at z~2: The Dynamical Mass-Size Relation, and First Constraints on the Fundamental plane
Creators: name: Toft, S.
name: Gallazzi, A.
name: Zirm, A.
name: Wold, M.
name: Zibetti, S.
name: Grillo, C.
name: Man, A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present dynamical and structural scaling relations of quiescent galaxies at z=2, including the dynamical mass-size relation and the first constraints on the fundamental plane (FP). The backbone of the analysis is a new, very deep VLT/X-shooter spectrum of a massive, compact, quiescent galaxy at z=2.0389. We detect the continuum between 3700-22000A and several strong absorption features (Balmer series, Ca H+K, G-band), from which we derive a stellar velocity dispersion of 318 +/- 53 km/s. We perform detailed modeling of the continuum emission and line indices and derive strong simultaneous constraints on the age, metallicity, and stellar mass. The galaxy is a dusty (A_V=0.77 (+0.36,-0.32)) solar metallicity (log(Z/Zsun) = 0.02 (+0.20,-0.41)) post starburst galaxy, with a mean luminosity weighted log(age/yr) of 8.9 +/- 0.1. The galaxy formed the majority of its stars at z>3 and currently has little or no ongoing star formation. We compile a sample of three other z~2 quiescent galaxies with measured velocity dispersions, two of which are also post starburst like. Their dynamical mass-size relation is offset significantly less than the stellar mass-size relation from the local early type relations, which we attribute to a lower central dark matter fraction. Recent cosmological merger simulations qualitatively agree with the data, but can not fully account for the evolution in the dark matter fraction. The z~2 FP requires additional evolution beyond passive stellar aging, to be in agreement with the local FP. The structural evolution predicted by the cosmological simulations is insufficient, suggesting that additional, possibly non-homologous structural evolution is needed.
description: Re-submitted to ApJ after implementing the comments of the referee
Britain, Anti-German Propaganda, and Greece During the First World War
Creators: name: Giannakopoulos, Georgios
Publisher: name: Zenodo
Year: 2023
Subjects: Britain
Intellectuals
Propaganda
German Empire
Greece
First World War
'New Europe'

description: Abstract This working paper reconstructs the role of intellectuals and policymakers in shaping the anti-German component of British propaganda during the First World War in the context of the scholar and public debate in the country on the causes of the war and Britain’s war aims. Special emphasis is given to the formulation of their discursive strategies and to their conceptual tools. Territorial questions and questions of state-building in Central and Southeastern Europe represent an important axis in this respect as they contributed to the content of elite-oriented propaganda. The elite journal New Europe offers a revealing example of this trend. The writings of Ronald Burrows and his stance on the Greek case are here explored as aspects of British WWI propaganda. Funding The production of this working paper was funded by the German Federal Foreign Office through the German-Greek Future Fund, as part of the research project “Images of Germany in Greece During the Great War: Discourses, Perceptions, and Propaganda, 1914-1918”, implemented by the Institute for the Study of Greek-German Relations of the Department of Political Science and Public Administration (National and Kapodistrian University of Athens), in cooperation with the Center for Modern Greece (Centrum Modernes Griechenland/CeMoG) of the Freie Universität Berlin (FU Berlin).
Effects of semiclassical spiral fluctuations on hole dynamics
Creators: name: Hamad, I. J.
name: Manuel, L. O.
name: Trumper, A. E.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We investigate the dynamics of a single hole coupled to the spiral fluctuations related to the magnetic ground states of the antiferromagnetic J_1-J_2-J_3 Heisenberg model on a square lattice. Using exact diagonalization on finite size clusters and the self consistent Born approximation in the thermodynamic limit we find, as a general feature, a strong reduction of the quasiparticle weight along the spiral phases of the magnetic phase diagram. For an important region of the Brillouin Zone the hole spectral functions are completely incoherent, whereas at low energies the spectral weight is redistributed on several irregular peaks. We find a characteristic value of the spiral pitch, Q=(0.7,0.7)π, for which the available phase space for hole scattering is maximum. We argue that this behavior is due to the non trivial interference of the magnon assisted and the free hopping mechanism for hole motion, characteristic of a hole coupled to semiclassical spiral fluctuations.
description: 6 pages, 5 figures
Energía proveniente de combustión interna: el caso del Sistema Integral de Transporte Público (SITP) en Bogotá
Creators: name: De la Torre Paredes, Karen Patricia
Publisher: name: Universidad del Rosario
Year: 2015

description: Bogotá, D.C., es uno de los municipios más importantes de Colombia, con cerca de 8 983 134 habitantes (Secretaría Distrital de Bogotá, 2015). El crecimiento exponencial que la población ha mostrado en los últimos años implicó un cambio de uso de suelo; relacionado directamente con el dinamismo de la economía y el proceso de urbanización (DeFries & Pandey, 2010). Es por eso que, cuanto más crezca la ciudad, más necesidades tendrá, y para satisfacer una de esas exigencias es necesario tener un sistema de transporte público eficaz. Por ende, en Bogotá fue implementado un sistema de transporte masivo integrado de diferentes servicios (urbano, especial, complementario, troncal, alimentador) que actualmente opera en trece zonas de la ciudad, con una flota cuya vida útil unitaria es de 12 años (Alcaldía Mayor de Bogotá, 2015), conocido como Sistema Integral de Transporte Público (SITP). Los vehículos obtienen su energía a partir de motores de combustión interna. El reto para la sociedad consiste en la innovación de tecnologías para: 1) aumentar el rendimiento de los motores (pues el combustible es cada vez más escaso y costoso), y 2) disminuir la emisión de gases de efecto invernadero (GEI) (Ávila, et al. 2005). Es un reto porque, conforme la urbanización aumenta, la demanda de energía también lo hace como resultado de un desarrollo sustancial de beneficios para la población (DeFries & Pandey, 2010); además de que el consumo de energía tiene una relación sistemática con la economía de una región (Romani & Van Benthem, s.f.).
La diversidad en los objetos: reflexión en torno a la colección etnográfica del Museo Nacional de Colombia
Creators: name: Olarte, Alba Lucía
Publisher: name: Universidad del Rosario
Year: 2015

description: El Museo Nacional de Colombia posee una importante colección etnográfica que por ahora no está abierta al público, debido, entre otras cosas, a la renovación del guión museográfico que involucra un replanteamiento de la exhibición de los objetos que integran toda la colección del Museo, incluyendo los objetos de carácter etnográfico. Esta renovación, en varios sentidos, permite responder a algunas de las críticas hechas a la manera como el Museo, a lo largo de su historia, ha exhibido los objetos que integran su colección y a los discursos que han atravesado tal exhibición. En el discurso que plantea el nuevo guión del museo, la reivindicación de las diferentes etnias de nuestro país resulta un asunto de importancia. Representar la diversidad étnica del país se califica como una prioridad en los objetivos del proyecto de renovación del guión museográfico. En tal proyecto, uno de los objetivos específicos dice: “Incluir múltiples voces que den cuenta de su [la nación] diversidad cultural y natural” (Baukara, 2013: 11). Entonces, más allá de la exhibición de objetos, lo que el Museo Nacional busca ahora es que esos objetos representen la diversidad cultural del país, procurando que se dé un reconocimiento en el que la voz de los otros sea como la propia; es decir, un reconocimiento que dé cuenta de una diversidad que no nos es ajena, sino que hace parte de lo que cada uno es
Santafé ilustrada
Creators: name: Granados Vela, Laura Alejandra
Publisher: name: Universidad del Rosario
Year: 2022

description: Reconocerse en el espacio donde se habita, consiste en darse cuenta de las características territoriales que hacen de cada persona perteneciente a una tierra, a un pueblo, a una nación, a un Estado. Conocer el transcurso de la historia de los ancestros no solo implica conocer los acontecimientos, sino hacerse parte de ellos por medio del reconocimiento de los espacios y las épocas en que se desarrollaron. Por esta razón, es necesario analizar y reconocer los espacios, el territorio, las modificaciones, la arquitectura, los hábitos urbanos y los sentimientos de pertenencia y territorialidad que caracterizaron a la Santafé de finales del siglo XVIII e inicios del XIX, para así comprender con mayor pertenencia el furor de la ilustración y los pensamientos independistas que tuvieron como cuna la capital del virreinato de Nueva Granada. Ciertamente, Santafé no era comparable con otras metrópolis de la época, tales como Lima –a causa de la menor importancia dada al Nuevo Reino de Granada por parte de la Corona Española, por sus pocos recursos útiles al imperio–. Apenas en el siglo XVIII se abrieron las puertas a un mundo ilustrado y moderno. Según lo anterior, el texto estará dividido en dos partes principales: la conformación urbana de Santafé y las diferencias socioculturales de los espacios, y su élite ilustrada. Estos temas se encuentran interrelacionados entre sí y se complementan uno a otro para conformar lo que fue la élite ilustrada en Santafé
Oxford SWIFT IFS and multi-wavelength observations of the Eagle galaxy at z=0.77
Creators: name: Kassin, Susan A.
name: Fogarty, L.
name: Goodsall, T.
name: Clarke, F. J.
name: Houghton, R. W. C.
name: Salter, G.
name: Thatte, N.
name: Tecza, M.
name: Davies, Roger L.
name: Weiner, Benjamin J.
name: Willmer, C. N. A.
name: Salim, Samir
name: Cooper, Michael C.
name: Newman, Jeffrey A.
name: Bundy, Kevin
name: Conselice, C. J.
name: Koekemoer, A. M.
name: Lin, Lihwai
name: Moustakas, Leonidas A.
name: Wang, Tao
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The `Eagle' galaxy at a redshift of 0.77 is studied with the Oxford Short Wavelength Integral Field Spectrograph (SWIFT) and multi-wavelength data from the All-wavelength Extended Groth strip International Survey (AEGIS). It was chosen from AEGIS because of the bright and extended emission in its slit spectrum. Three dimensional kinematic maps of the Eagle reveal a gradient in velocity dispersion which spans 35-75 +/- 10 km/s and a rotation velocity of 25 +/- 5 km/s uncorrected for inclination. Hubble Space Telescope images suggest it is close to face-on. In comparison with galaxies from AEGIS at similar redshifts, the Eagle is extremely bright and blue in the rest-frame optical, highly star-forming, dominated by unobscured star-formation, and has a low metallicity for its size. This is consistent with its selection. The Eagle is likely undergoing a major merger and is caught in the early stage of a star-burst when it has not yet experienced metal enrichment or formed the mass of dust typically found in star-forming galaxies.
description: accepted for publication in MNRAS
Eliten und Wirtschaft: Handwerk und Gewerbe im Bereich mittelalterlicher Herrschaftssitze
Creators: name: Herdick, Michael
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2020

description: -
description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 42 Nr. 3 (2001): Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Gravitational Microlensing of a Reverberating Quasar Broad Line Region - I. Method and Qualitative Results
Creators: name: Garsden, H.
name: Bate, N. F.
name: Lewis, G. F.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The kinematics and morphology of the broad emission line region (BELR) of quasars are the subject of significant debate. The two leading methods for constraining BELR properties are microlensing and reverberation mapping. Here we combine these two methods with a study of the microlensing behaviour of the BELR in Q2237+0305, as a change in continuum emission (a "flare") passes through it. Beginning with some generic models of the BELR - sphere, bicones, disk - we slice in velocity and time to produce brightness profiles of the BELR over the duration of the flare. These are numerically microlensed to determine whether microlensing of reverberation mapping provides new information about the properties of BELRs. We describe our method and show images of the models as they are flaring, and the unlensed and lensed spectra that are produced. Qualitative results and a discussion of the spectra are given in this paper, highlighting some effects that could be observed. Our conclusion is that the influence of microlensing, while not strong, can produce significant observable effects that will help in differentiating the properties of BELRs.
description: 17 pages, 14 low resolution figures, 1 table, accepted for MNRAS. v2: Corrected velocities p16, 8 to 0.08, 9 to 0.09
Multiwavelength Campaign on Mrk 509 X. Lower limit on the distance of the absorber from HST COS and STIS spectroscopy
Creators: name: Arav, N.
name: Edmonds, D.
name: Borguet, B.
name: Kriss, G. A.
name: Kaastra, J. S.
name: Behar, E.
name: Bianchi, S.
name: Cappi, M.
name: Costantini, E.
name: Detmers, R. G.
name: Ebrero, J.
name: Mehdipour, M.
name: Paltani, S.
name: Petrucci, P. O.
name: Pinto, C.
name: Ponti, G.
name: Steenbrugge, K. C.
name: de Vries, C. P.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Active Galactic Nuclei often show evidence of photoionized outflows. A major uncertainty in models for these outflows is the distance ($R$) to the gas from the central black hole. In this paper we use the HST/COS data from a massive multi-wavelength monitoring campaign on the bright Seyfert I galaxy Mrk 509, in combination with archival HST/STIS data, to constrain the location of the various kinematic components of the outflow. We compare the expected response of the photoionized gas to changes in ionizing flux with the changes measured in the data using the following steps: 1) We compare the column densities of each kinematic component measured in the 2001 STIS data with those measured in the 2009 COS data; 2) We use time-dependent photionization calculations with a set of simulated lightcurves to put statistical upper limits on the hydrogen number density that are consistent with the observed small changes in the ionic column densities; 3) From the upper limit on the number density, we calculate a lower limit on the distance to the absorber from the central source via the prior determination of the ionization parameter. Our method offers two improvements on traditional timescale analysis. First, we account for the physical behavior of AGN lightcurves. Second, our analysis accounts for the quality of measurement in cases where no changes are observed in the absorption troughs. The very small variations in trough ionic column densities (mostly consistent with no change) between the 2001 and 2009 epochs allow us to put statistical lower limits on the distance between 100--200 pc for all the major UV absorption components at a confidence level of 99%. These results are mainly consistent with the independent distance estimates derived for the warm absorbers from the simultaneous X-ray spectra.
description: Accepted to A&A (06 APR 2012)
Consideraciones filosóficas sobre la habilidad manual
Creators: name: Uribe Cortes, César Augusto
Publisher: name: Universidad del Rosario
Year: 2022

description: La sofisticada habilidad manual humana, considerada como un caso concreto de aprendizaje, se fundamenta desde el ámbito biológico en virtud del instinto, pero concebida como un proceso explicado por la selección natural, requiere de la influencia del ámbito socio-cultural propio de los seres humanos, por lo que se percibe un hiato entre instinto y aprendizaje. Esta investigación propone a través del razonamiento comparativo entre ejemplos de habilidad manipulativa en lo biológico y socio-cultural, telaraña es a atarraya respectivamente, un nivel de descripción plausible provisto por el enactivismo como una corriente alternativa a la ciencia tradicional cognitiva. Este ejercicio analógico muestra continuidades entre el instinto y el aprendizaje. En esta comparación se da cuenta del potencial filosófico que tiene la deliberación razonada con respecto a lo que la mano es para los seres humanos en su dimensión biológica, fenomenológica y cognitiva.
The impact of spatial correlation on the tunneling dynamics of few-boson mixtures in a combined triple well and harmonic trap
Creators: name: Cao, Lushuai
name: Brouzos, Ioannis
name: Chatterjee, Budhaditya
name: Schmelcher, Peter
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We investigate the tunneling properties of a two-species few-boson mixture in a one-dimensional triple well and harmonic trap. The mixture is prepared in an initial state with a strong spatial correlation for one species and a complete localization for the other species. We observe a correlation-induced tunneling process in the weak interspecies interaction regime. The onset of the interspecies interaction disturbes the spatial correlation of one species and induces tunneling among the correlated wells. The corresponding tunneling properties can be controlled by the spatial correlations with an underlying mechanism which is inherently different from the well known resonant tunneling process. We also observe the correlated tunneling of both species in the intermediate interspecies interaction regime and the tunneling via higher band states for strong interactions.
description: 21 pages, 7 figures
The Dissertation Almost Done, But How To Publish Now?
Creators: name: Bargheer, Margo
Publisher: name: Zenodo
Year: 2016
Subjects: open access
open science
publishing
university press

description: This is a talk I gave for international members of Göttingen Graduate Schools. It aims at understanding why we publish, how the publishing system works and what role Open Access and Open Science play. I also introduced the publishing services our library runs on behalf of the university.