cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Tracking quantum coherence in polariton condensates with time-resolved tomography
Creators: name: Lüders, Carolin
name: Pukrop, Matthias
name: Barkhausen, Franziska
name: Rozas, Elena
name: Schneider, Christian
name: Höfling, Sven
name: Sperling, Jan
name: Schumacher, Stefan
name: Aßmann, Marc
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Long-term quantum coherence constitutes one of the main challenges when engineering quantum devices. However, easily accessible means to quantify complex decoherence mechanisms are not readily available, nor are sufficiently stable systems. We harness novel phase-space methods - expressed through non-Gaussian convolutions of highly singular Glauber-Sudarshan quasiprobabilities - to dynamically monitor quantum coherence in polariton condensates with significantly enhanced coherence times. Via intensity- and time-resolved reconstructions of such phase-space functions from homodyne detection data, we probe the systems's resourcefulness for quantum information processing up to the nanosecond regime. Our experimental findings are confirmed through numerical simulations for which we develop an approach that renders established algorithms compatible with our methodology. In contrast to commonly applied phase-space functions, our distributions can be directly sampled from measured data, including uncertainties, and yield a simple operational measure of quantum coherence via the distribution's variance in phase. Therefore, we present a broadly applicable framework and a platform to explore time-dependent quantum phenomena and resources.
description: paper plus supplemental material
Expected number of supergiant fast X-ray transients in the Milky Way
Creators: name: Ducci, L.
name: Doroshenko, V.
name: Romano, P.
name: Santangelo, A.
name: Sasaki, M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: In the past fifteen years a new generation of X-ray satellites led to the discovery of a subclass of high-mass X-ray binaries (HMXBs) with supergiant companions and a peculiar transient behaviour: supergiant fast X-ray transients (SFXTs). We calculate the expected number of Galactic SFXTs for the first time, using two different statistical approaches and two sets of data based on Swift and INTEGRAL surveys, with the aim to determine how common the SFXT phenomenon really is. We find that the expected number of SFXTs in the Galaxy is about 37(+53, -22) which shows that SFXTs constitute a large portion of X-ray binaries with supergiant companions in the Galaxy. We compare our estimate with the expected number of Galactic HMXBs predicted from observations and evolutionary models and discuss the implications for the nature of SFXTs.
description: Accepted for publication in Astronomy and Astrophysics. 5 pages
SPATIAL DISTRIBUTION OF CHLORIDE IONS IN GROUNDWATER USING KRIGING INTERPOLATION: A CASE STUDY IN AL-SHAMMIS, SYRIA
Creators: name: Ezzat, Harba
name: Nisreen,, KHALLOUF
Publisher: name: Zenodo
Year: 2023

description: ABSTRACT 
 
Introduction: This research addresses a concerning issue that emerged in the Shmamis well in early 2018, revealing the presence of cyanide in varying proportions ranging from 0.001 to 0.002 mg/l. The focus is on understanding and mitigating this water quality challenge. Objective: The primary objective of this study is to evaluate the quality of well water in the Shamamis area. This assessment encompasses an examination of the water's suitability for both drinking and irrigation, aligning with Syrian standard specifications. Additionally, the study aims to investigate the spatial contamination levels of groundwater pollutants in the region. Methods: The methodology employed involves the utilization of Kriging to study the spatial contamination levels of groundwater pollutants. This geostatistical interpolation technique is applied to map and analyze the distribution patterns of contaminants, providing valuable insights into the extent of pollution in the study area. Results: The analysis of the well water quality in the Shamamis area revealed the presence of cyanide within the range of 0.001 to 0.002 mg/l. Furthermore, employing Kriging facilitated a spatial assessment of groundwater pollutants, allowing for a comprehensive understanding of contamination levels across the region. Conclusion: In conclusion, this research sheds light on the critical issue of water contamination in the Shamamis well. The findings highlight the presence of cyanide and prompt an evaluation of the water's fitness for consumption and irrigation. The spatial analysis using Kriging contributes to a nuanced understanding of groundwater pollutant distribution. This study underscores the importance of addressing water quality concerns in the Shamamis area, emphasizing the need for remedial measures to safeguard both drinking water and agricultural resources.
Keywords: Shamamis Well; Cyanide Contamination; Water Quality Assessment; Kriging Methodology; Groundwater Pollutants.
Verwey transition in single magnetite nanoparticles
Creators: name: Yu, Q.
name: Mottaghizadeh, A.
name: Wang, H.
name: Ulysse, C.
name: Zimmers, A.
name: Rebuttini, V.
name: Pinna, N.
name: Aubin, H.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We present a tunnel spectroscopy study of the electronic spectrum of single magnetite \chemform{Fe_3O_4} nanoparticles trapped between nanometer-spaced electrodes. The Verwey transition is clearly identified in the current voltage-characteristics where we find that the transition temperature is electric field dependent. The data show the presence of localized states at high energy, $\varepsilon \sim 0.6eV$, which can be attributed to polaron states. At low energy, the density of states (DOS) is suppressed at the approach of the Verwey transition. Below the Verwey transition, a gap, $Δ\sim 300meV$, is observed in the spectrum. In contrast, no gap is observed in the high temperature phase, implying that electronic transport in this phase is possibly due to polaron hopping with activated mobility.
description: 5 pages, 5 figures. Higher resolution images in published paper
Neural behavioral impact of daily sugar-sweetened beverage intake
Creators: name: Burger, Kyle
Publisher: name: Open Science Framework
Year: 2022
Subjects: subject: Social and Behavioral Sciences
subject: Life Sciences

description: Overall aim: Test the impact of repeated consumption of sugar sweetened beverage on behavioral responses (reaction time) during exposure to associated sugar-sweetened beverage cues. Study pre-registration prior to data collection: ClinicalTrials.gov: NCT03490734 (submitted 4/6/2018)
On M-theory fourfold vacua with higher curvature terms
Creators: name: Grimm, Thomas W.
name: Pugh, Tom G.
name: Weissenbacher, Matthias
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study solutions to the eleven-dimensional supergravity action, including terms quartic and cubic in the Riemann curvature, that admit an eight-dimensional compact space. The internal background is found to be a conformally Kahler manifold with vanishing first Chern class. The metric solution, however, is non-Ricci-flat even when allowing for a conformal rescaling including the warp factor. This deviation is due to the possible non-harmonicity of the third Chern-form in the leading order Ricci-flat metric. We present a systematic derivation of the background solution by solving the Killing spinor conditions including higher curvature terms. These are translated into first-order differential equations for a globally defined real two-form and complex four-form on the fourfold. We comment on the supersymmetry properties of the described solutions.
description: 14 pages
Effect of alloying on the microstructure, phase stability, hardness and partitioning behavior of a new dual-superlattice nickel-based superalloy
Creators: name: Rodenkirchen, C.
name: Ackerman, A. K.
name: Mignanelli, P. M.
name: Cliff, A.
name: Wise, G. J.
name: Douglas, J. O.
name: Bagot, P. A. J.
name: Moody, M. P.
name: Appleton, M.
name: Ryan, M. P.
name: Hardy, M. C.
name: Pedrazzini, S.
name: Stone, H. J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A novel y-y'-y" dual-superlattice superalloy, with promising mechanical properties up to elevated temperatures was recently reported. The present work employs state of the art chemical and spatial characterization techniques to study the effect systematic additions of Mo, W and Fe and variations in Nb and Al contents have on the phase fraction, thermal stability, elemental partitioning and mechanical properties. Alloys were produced through arc melting followed by heat treatment. Multi-scale characterization techniques and hardness testing were employed to characterize their microstructure, thermal stability and mechanical properties. Alterations in such properties or in elemental partitioning behaviour were then explained through thermodynamic modelling. A modest addition of 1.8 at.% Mo had a strong effect on the microstructure and thermal stability: it minimized microstructural coarsening during heat treatments while not significantly decreasing the y' solvus temperature. A reduction of Nb by 0.6 at.%, strongly reduced the y" volume fraction, without affecting the y' volume fraction. The reduced precipitate fraction led to a significant reduction in alloy hardness. Fe, added to achieve better processability and reduced material cost, decreased the y' solvus temperature and caused rapid microstructural coarsening during heat treatments, without affecting alloy hardness. A reduction of Al by 0.4 at.%, reduced the y' volume fraction and the y' solvus temperature, also without affecting alloy hardness. The addition of 0.9 at.% W decreased the y' solvus temperature but increased both precipitate volume fractions. These data will be invaluable to optimize current alloy design and to inform future alloy design efforts.
Aggregating Correlated Estimations with (Almost) no Training
Creators: name: Delemazure, Theo
name: Durand, François
name: Mathieu, Fabien
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Multiagent Systems (cs.MA)
subject: Optimization and Control (math.OC)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: Many decision problems cannot be solved exactly and use several estimation algorithms that assign scores to the different available options. The estimation errors can have various correlations, from low (e.g. between two very different approaches) to high (e.g. when using a given algorithm with different hyperparameters). Most aggregation rules would suffer from this diversity of correlations. In this article, we propose different aggregation rules that take correlations into account, and we compare them to naive rules in various experiments based on synthetic data. Our results show that when sufficient information is known about the correlations between errors, a maximum likelihood aggregation should be preferred. Otherwise, typically with limited training data, we recommend a method that we call Embedded Voting (EV).
Moment evolution across the ferromagnetic phase transition of giant magnetocaloric (Mn,Fe)2(P,Si,B) compounds
Creators: name: Yibole, H.
name: Guillou, F.
name: Caron, L.
name: Jiménez, E.
name: de Groot, F. M. F.
name: Roy, P.
name: de Groot, R.
name: van Dijk, N. H.
name: Brück, E.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A strong electronic reconstruction resulting in a quenching of the Fe magnetic moments has recently been predicted to be at the origin of the giant magnetocaloric effect displayed by Fe2Pbased materials. To verify this scenario, X-ray Magnetic Circular Dichroism experiments have been carried out at the L edges of Mn and Fe for two typical compositions of the (Mn,Fe)2(P,Si,B) system. The dichroic absorption spectra of Mn and Fe have been measured element specific in the vicinity of the first-order ferromagnetic transition. The experimental spectra are compared with first-principle calculations and charge-transfer multiplet simulations in order to derive the magnetic moments. Even though signatures of a metamagnetic behaviour are observed either as a function of the temperature or the magnetic field, the similarity of the Mn and Fe moment evolution suggests that the quenching of the Fe moment is weaker than previously predicted.
AllBRICQS: the All-sky BRIght, Complete Quasar Survey
Creators: name: Onken, Christopher A.
name: Wolf, Christian
name: Hon, Wei Jeat
name: Lai, Samuel
name: Tisserand, Patrick
name: Webster, Rachel
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We describe the first results from the All-sky BRIght, Complete Quasar Survey (AllBRICQS), which aims to discover the last remaining optically bright quasars. We present 156 spectroscopically confirmed quasars (140 newly identified) having |b|>10deg. 152 of the quasars have Gaia DR3 magnitudes brighter than B_P=16.5 or R_P=16 mag, while four are slightly fainter. The quasars span a redshift range of z=0.07-3.93. In particular, we highlight the properties of J0529-4351 at z=3.93, which, if unlensed, is one of the most intrinsically luminous quasars in the Universe. The AllBRICQS sources have been selected by combining data from the Gaia and WISE all-sky satellite missions, and we successfully identify quasars not flagged as candidates by Gaia Data Release 3. We expect the completeness to be approximately 96% within our magnitude and latitude limits, while the preliminary results indicate a selection purity of approximately 96%. The optical spectroscopy used for source classification will also enable detailed quasar characterisation, including black hole mass measurements and identification of foreground absorption systems. The AllBRICQS sources will greatly enhance the number of quasars available for high-signal-to-noise follow-up with present and future facilities.
description: 33 pages. Accepted for publication in PASA. Minor edits from previous version
Open WIN Ambassadors: Call notes and documentation drafts
Creators: name: Clare, Stuart
name: Draschkow, Dejan
name: Feng, Yingshi
name: Gould van Praag, Cassandra
name: Sarrazin, Verena
name: Mackay, Clare
name: Taschler, Bernd
Publisher: name: Zenodo
Year: 2022

description: Call notes, documentation and comms created by the Open WIN Ambassadors, Wellcome Centre for Integrative Neuroimaging, University of Oxford. Please refer to the GitLab repository for most up-to-date materials and contributions: https://git.fmrib.ox.ac.uk/open-science/community/open-win-ambassadors This version issued at the end of the 2021-2022 cohort. Author Contributions (credit): Conceptualization: Stuart Clare, Cassandra D. Gould van Praag, Clare E. Mackay. Data curation: Cassandra D. Gould van Praag. Formal analysis: Cassandra D. Gould van Praag. Funding acquisition: Stuart Clare, Clare E. Mackay. Investigation: Cassandra D. Gould van Praag. Methodology: Stuart Clare, Cassandra D. Gould van Praag, Clare E. Mackay. Project administration: Stuart Clare, Dejan Draschkow, Yingshi Feng, Cassandra Gould van Praag, Clare E. Mackay, Verena Sarrazin, Bernd Taschler. Resources: Dejan Draschkow, Yingshi Feng, Cassandra Gould van Praag, Verena Sarrazin, Bernd Taschler. Software: Dejan Draschkow, Yingshi Feng, Cassandra Gould van Praag, Verena Sarrazin, Bernd Taschler. Supervision: Stuart Clare, Cassandra D. Gould van Praag, Clare E. Mackay. Visualization: Dejan Draschkow, Yingshi Feng, Cassandra Gould van Praag, Verena Sarrazin, Bernd Taschler. Writing - original draft: Dejan Draschkow, Yingshi Feng, Cassandra Gould van Praag, Verena Sarrazin, Bernd Taschler. Writing - review & editing: Dejan Draschkow, Yingshi Feng, Cassandra Gould van Praag, Verena Sarrazin, Bernd Taschler.
Current flow in biased bilayer graphene: the role of sublattices
Creators: name: Páez, C. J.
name: Bahamon, D. A.
name: Pereira, Ana L. C.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate here how the current flows over a bilayer graphene in the presence of an external electric field perpendicularly applied (biased bilayer). Charge density polarization between layers in these systems is known to create a layer pseudospin, which can be manipulated by the electric field. Our results show that current does not necessarily flow over regions of the system with higher charge density. Charge can be predominantly concentrated over one layer, while current flows over the other layer. We find that this phenomenon occurs when the charge density becomes highly concentrated over only one of the sublattices, as the electric field breaks layer and sublattice symmetries for a Bernal-stacked bilayer. For bilayer nanoribbons, the situation is even more complex, with a competition between edge and bulk effects for the definition of the current flow. We show that, in spite of not flowing trough the layer where charge is polarized to, the current in these systems also defines a controllable layer pseudospin.
description: 9 pages, 6 figures
Discrepancies between isochrone fitting and gyrochronology for exoplanet host stars?
Creators: name: Brown, D. J. A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Using a sample of 68 planet-hosting stars I carry out a comparison of isochrone fitting and gyrochronology to investigate whether tidal interactions between the stars and their planets are leading to underestimated ages using the latter method. I find a slight tendency for isochrones to produce older age estimates but find no correlation with tidal time-scale, although for some individual systems the effect of tides might be leading to more rapid rotation than expected from the stars' isochronal age, and therefore an underestimated gyrochronology age. By comparing to planetary systems in stellar clusters, I also find that in some cases isochrone fitting can overestimate the age of the star. The evidence for any bias on a sample-wide level is inconclusive. I also consider the subset of my sample for which the sky-projected alignment angle between the stellar rotation axis and the planet's orbital axis has been measured, finding similar patterns to those identified in the full sample. However, small sample sizes for both the misaligned and aligned systems prevent strong conclusions from being drawn.
description: 21 pages, 16 figures, 3 tables. This article has been accepted for publication in MNRAS \copyright: 2014 Published by Oxford University Press on behalf of the author
Belief revision and incongruity: is it a joke?
Creators: name: Bannay, Florence Dupin de Saint Cyr -
name: Prade, Henri
Publisher: name: arXiv
Year: 2023
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Incongruity often makes people laugh. You have to be smart to say stupid things. It requires to be even smarter for understanding them. This paper is a shameless attempt to formalize this intelligent behavior in the case of an agent listening to a joke. All this is a matter of revision of beliefs, surprise and violation of norms.
description: A special paper on/in humor/honor for/of Philippe Besnard
Correlation energy of the paramagnetic electron gas at the thermodynamic limit
Creators: name: Azadi, Sam
name: Drummond, N. D.
name: Vinko, S. M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Chemical Physics (physics.chem-ph)
subject: Plasma Physics (physics.plasm-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The variational and diffusion quantum Monte Carlo methods are used to calculate the correlation energy of the paramagnetic three-dimensional homogeneous electron gas at intermediate to high density. Ground state energies in finite cells are determined using Slater-Jastrow-backflow trial wave functions, and finite-size errors are removed using twist-averaged boundary conditions and extrapolation of the energy per particle to the thermodynamic limit of infinite system size. Our correlation energies in the thermodynamic limit are lower (i.e., more negative, and therefore more accurate according to the variational principle) than previous results, and can be used for the parameterization of density functionals to be applied to high-density systems.
Tropical matroid homology
Creators: name: Alderete, Austin
name: 0000-0002-6698-3746
Publisher: name: The University of Texas at Austin
Year: 2022
Subjects: Matroid
Homology
Tropical geometry
Chow ring
Graph theory
2-chordal bipartite

description: This thesis consists of independent projects on tropical matroid homology, graph recognition algorithms, and matroid classification. The first part provides an affirmative answer to a 2016 conjecture regarding matroid homology as well as sufficient conditions under which the results can be generalized. Accompanying this work is a polymake extension which allows for the computation of tropical matroid homology as well as the homology of a novel chain complex which resembles tropical matroid homology but is associated to the Chow ring of an arbitrary matroid. The second work provides an algorithm for determining whether a graph is 2-chordal bipartite, a class of graphs which have been connected to discrete statistical models, and we determine the complexity of this algorithm. As a natural extension, we introduce the class of k-chordal bipartite graphs and show that this class is empty for k ≥ 4.
Kommilitoninnen und Kommilitonen! Heute ist der 1. Juli!; 1965
Creators: name: Piening, Jürgen
Publisher: name: Universitätsbibliothek der Technischen Universität Berlin
Year: 2018

description: Enthält: Aufruf des Vorstandes der Studentenvertretung der Technischen Universität Berlin zu einer Demonstration im Rahmen der bundesweiten Aktion 1. Juli zum Bildungsnotstand vom 1. Juli 1965. 1 Seite. S/w.
La cartografia storica e il Gis nello studio delle città: il caso dell’Aquila [poster]
La cartografia storica e il Gis nello studio delle città: il caso dell’Aquila [poster]
Creators: name: Tagliente, Paola
Publisher: name: P. Tagliente, "La cartografia storica e il Gis nello studio delle città: il caso dell’Aquila", in Invito alla Storia. Terza Conferenza Nazionale dell'Associazione Italiana di Public HIstory AIPH 2019. Università della Campania "Luigi Vanvitelli", Santa Maria Capua Vetere e Caserta, 24-28 giugno 2019
Year: 2025

description: Le tecnologie GIS pongono nuove sfide alla cartografia storica che nascono proprio dal confronto fra le diverse tecniche cartografiche antiche e la moderna cartografia digitale. L’incolmabile gap tecnologico tra passato e presente porta spesso a dei risultati insoddisfacenti soprattutto nel momento in cui si georiferisce una mappa antica, operazione che frequentemente porta a deformazioni che alterano il documento originario in una maniera che appare discutibile dal punto di vista delle fonti storiche.
Dynamics of photo-induced ferromagnetism in oxides with orbital degeneracy
Creators: name: Curtis, Jonathan B.
name: Disa, Ankit
name: Fechner, Michael
name: Cavalleri, Andrea
name: Narang, Prineha
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: By using intense coherent electromagnetic radiation, it may be possible to manipulate the properties of quantum materials very quickly, or even induce new and potentially useful phases that are absent in equilibrium. For instance, ultrafast control of magnetic dynamics is crucial for a number of proposed spintronic devices and can also shed light on the possible dynamics of correlated phases out of equilibrium. Inspired by recent experiments on spin-orbital ferromagnet YTiO$_3$ we consider the nonequilibrium dynamics of Heisenberg ferromagnetic insulator with low-lying orbital excitations. We model the dynamics of the magnon excitations in this system following an optical pulse which resonantly excites infrared-active phonon modes. As the phonons ring down they can dynamically couple the orbitals with the low-lying magnons, leading to a dramatically modified effective bath for the magnons. We show this transient coupling can lead to a dynamical acceleration of the magnetization dynamics, which is otherwise bottlenecked by small anisotropy. Exploring the parameter space more we find that the magnon dynamics can also even completely reverse, leading to a negative relaxation rate when the pump is blue-detuned with respect to the orbital bath resonance. We therefore show that by using specially targeted optical pulses, one can exert a much greater degree of control over the magnetization dynamics, allowing one to optically steer magnetic order in this system. We conclude by discussing interesting parallels between the magnetization dynamics we find here and recent experiments on photo-induced superconductivity, where it is similarly observed that depending on the initial pump frequency, an apparent metastable superconducting phase emerges.
description: 16 pages, 11 figures + 5 pages, no figures
From Problematic Asphaltenes towards Hyper-crosslinked Polymeric Structures
Creators: name: Ok, Salim
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 340303
subject: Nanochemistry

description: The nanoaggregate formation of asphaltenes, the heaviest component of crude oil, is an important scientific challenge. The nanoaggregates of asphaltenes show polymeric behavior in solution, allowing the determination of average molecular mass by diffusion NMR spectroscopy [1]. Moreover, clarification of the chemical structures of asphaltenes at the sub- molecular level by spectroscopy methods revealed the potential reactivity of polymeric asphaltenes. In the present study, we demonstrate how we could synthesize hyper-crosslinked polymeric structures (poly(asphaltenes)) with nanopores from asphaltenes. Raman spectra of asphaltenes showed an increase in average molecular dimensions of cross-linked asphaltenes compared to the original asphaltenes without cross-linking. The calculated BET surface area for the cross-linked asphaltenes was displayed in the range of 90−151 m2g−1. Micropore size distribution determined by the NLDFT method confirmed that the majority of micropores in the cross-linked asphaltenes are between 10 and 20 Å [2]. Crosslinking polymeric asphaltenes are considered stepping stones for preparing highly porous carbonaceous materials with functional groups suitable for different applications, such as gas adsorption and sensors.
Vergiss nicht zu wählen; 1965
Creators: name: (:Unav)
Publisher: name: Universitätsbibliothek der Technischen Universität Berlin
Year: 2018

description: Enthält: Karikatur als Aufforderung, sich an der Wahl zum 20. Studentenparlament vom 31. Mai bis 3. Juni 1965 zu beteiligen. 1 Seite. Skizze eines sich verabschiedenden Paares, s/w.
Aufruf. In Besorgnis um den wachsenden Bildungsnotstand; 1965
Creators: name: (:Unav)
Publisher: name: Universitätsbibliothek der Technischen Universität Berlin
Year: 2018

description: Enthält: Aufruf des Verbands Deutscher Studentenschaften (VDS) sowie des Studentenverbands Deutscher Ingenieurschulen (SVI) zu Kundgebungen und Demonstrationen im Rahmen der bundesweiten Aktion 1. Juli 1965.- Begründung.- Bildungsnotstand in Zahlen. 1 Blatt. S/w.
Observational Signatures of Galactic Winds Powered by Active Galactic Nuclei
Creators: name: Nims, Jesse
name: Quataert, Eliot
name: Faucher-Giguere, Claude-Andre
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We predict the observational signatures of galaxy scale outflows powered by active galactic nuclei (AGN). Most of the emission is produced by the forward shock driven into the ambient interstellar medium (ISM) rather than by the reverse shock. AGN powered galactic winds with energetics suggested by phenomenological feedback arguments should produce spatially extended 1-10 keV X-ray emission of 10^(41-44) erg/s, significantly in excess of the spatially extended X-ray emission associated with normal star forming galaxies. The presence of such emission is a direct test of whether AGN outflows significantly interact with the ISM of their host galaxy. We further show that even radio quiet quasars should have a radio luminosity comparable to or in excess of the far infrared-radio correlation of normal star forming galaxies. This radio emission directly constrains the total kinetic energy flux in AGN-powered galactic winds. Radio emission from AGN wind shocks can also explain the recently highlighted correlations between radio luminosity and the kinematics of AGN narrow-line regions in radio quiet quasars.
Todesurteil und lebenslängliche Haft für verschleppte Südkoreaner; 1967
Creators: name: Läpple, Dieter
Publisher: name: Universitätsbibliothek der Technischen Universität Berlin
Year: 2018

description: Enthält: Information des Vorstandes der Studentenvertretung der TU Berlin vom 14. Dezember 1967 zur Resolution des 22. Studentenparlaments der TU Berlin vom 6. Juli 1967.- Verschleppung südkoreanischer Personen aus der Bundesrepublik und Westberlin, darunter ein Doktorand der TU Berlin, Lim. 1 Blatt. S/w.
Population heterogeneity in the fractional master equation, ensemble self-reinforcement and strong memory effects
Creators: name: Fedotov, Sergei
name: Han, Daniel
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Biomolecules (q-bio.BM)
subject: Subcellular Processes (q-bio.SC)
subject: Other Statistics (stat.OT)
subject: FOS: Physical sciences
subject: FOS: Biological sciences
subject: FOS: Computer and information sciences

description: We formulate a fractional master equation in continuous time with random transition probabilities across the population of random walkers such that the effective underlying random walk exhibits ensemble self-reinforcement. The population heterogeneity generates a random walk with conditional transition probabilities that increase with the number of steps taken previously (self-reinforcement). Through this, we establish the connection between random walks with a heterogeneous ensemble and those with strong memory where the transition probability depends on the entire history of steps. We find the ensemble averaged solution of the fractional master equation through subordination involving the fractional Poisson process counting the number of steps at a given time and the underlying discrete random walk with self-reinforcement. We also find the exact solution for the variance which exhibits superdiffusion even as the fractional exponent tends to 1.
Im Berliner Aktionskomitee 1. Juli sind vertreten; 1965
Creators: name: (:Unav)
Publisher: name: Universitätsbibliothek der Technischen Universität Berlin
Year: 2018

description: Enthält: Informationsblatt zur Beteiligung der Berliner Schüler und Studierenden an der bundesweiten Aktion 1. Juli (zum Bildungsnotstand) am 1. Juli 1965. 1 Seite. S/w.
Exchange bias in phase-segregated Nd2/3Ca1/3MnO3 as a function of temperature and cooling magnetic fields
Creators: name: Fertman, Elena
name: Dolya, Sergiy
name: Desnenko, Vladimir
name: Pozhar, Liudmia A.
name: Kajnakova, Marcela
name: Feher, Alexander
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Exchange bias (EB) phenomena have been observed in Nd2/3Ca1/3MnO3 colossal magnetoresistance perovskite below the Curie temperature $T_{C}$ = 70 K and attributed to an antiferromagnetic (AFM) - ferromagnetic (FM) spontaneous phase segregated state of this compound. Field cooled magnetic hysteresis loops exhibit shifts toward negative direction of the magnetic field axis. The values of exchange field $H_{EB}$ and coercivity $H_{C}$ are found to be strongly dependent of temperature and strength of the cooling magnetic field $H_{cool}$. These effects are attributed to evolution of the FM phase content and a size of FM clusters. A contribution to the total magnetization of the system due to the FM phase has been evaluated. The exchange bias effect decreases with increasing temperature up to $T_{C}$ and vanishes above this temperature with disappearance of FM phase. Relaxation of a non-equilibrium magnetic state of the compound manifests itself through a training effect also observed while studying EB in Nd2/3Ca1/3MnO3.
description: 18 pages
Water and Related Land Resources, James River Basin and Designated Missouri River Sub-Basins, South Dakota
Creators: name: Economic Research Service
name: Service, Forest
name: Soil Conservation Service
name: Economic Research Service
name: Service, Forest
name: Soil Conservation Service
Publisher: name: Unknown
Year: 1966
Subjects: Agricultural and Food Policy
Community/Rural/Urban Development
Crop Production/Industries
Labor and Human Capital
Land Economics/Use
Livestock Production/Industries
Productivity Analysis
Research Methods/ Statistical Methods
Resource /Energy Economics and Policy

description: Excerpts from the report: The Study Area has 20,081 square miles which is twenty-six percent of the total land area in the State of South Dakota. This area includes the drainage of the James River in South Dakota, plus the balance of the Oahe Conservancy Sub-District outside the James River Basin (Figure 2). About 42 percent of the State's farms and ranches is in this area, and these produce 37 percent of the total value of farm products sold in the State. The average annual run-off from the James River Basin is 0.23 inch. The water yield is the lowest of all the major river basins in South Dakota. The objective of the Study is to evaluate opportunities for developing water and land resources within the area for present and future use. Achievement of this objective requires an inventory of the utilization of water and land, identification of problems associated with water and land and delineation of other opportunities. Accomplishment of this objective provides data the sponsoring organizations can use to develop understanding among the people of the problems and opportunities within the area. The report will assist in effective planning of possible land and water resource development by various agencies.
description: Section 6 of the Watershed Protection and Flood Prevention Act (P.L. 566, 83rd Cong., 68 Stat 666), as amended, contains this statement: The Secretary is authorized in cooperation with other Federal Agencies and with States and local agencies to make investigations and surveys of the watersheds of rivers and other waterways as a basis for the development of coordinated programs. The South Dakota Water Resources Commission and the Oahe Conservancy Sub-District made a formal request for a Section 6 Study in May 1961. USDA approval for the Study was based on a Plan of Work dated September 6, 1962. This Plan of Work was developed by the Department of Agriculture cooperating with the South Dakota Water Resources Commission and the Directors of the Oahe Conservancy Sub-District. These local entities of State government became sponsors.
La valorizzazione dell’habitat rupestre dell’ennese. Per uno sviluppo sostenibile del territorio [poster]
La valorizzazione dell’habitat rupestre dell’ennese. Per uno sviluppo sostenibile del territorio [poster]
Creators: name: Patti, Daniela
name: Marchese, Pinella Filippa
name: Mirto, Vittorio
Publisher: name: D. Patti, P. F. Marchese, V. Mirto, "La valorizzazione dell’habitat rupestre dell’ennese. Per uno sviluppo sostenibile del territorio", in Invito alla Storia. Terza Conferenza Nazionale dell'Associazione Italiana di Public HIstory AIPH 2019. Università della Campania "Luigi Vanvitelli", Santa Maria Capua Vetere e Caserta, 24-28 giugno 2019
Year: 2025

description: Dagli studi condotti negli ultimi anni anche nell’ambito della convenzione tra l’Università di Enna “Kore” e la sezione archeologica della Soprintendenza ai BBCCAAA di Enna (ri)emersa una realt insediativa collegata all’habitat rupestre ricchissima e molto articolata che merita di essere conosciuta, tutelata e valorizzata, anche in considerazione dei fenomeni di degrado in atto che ne mettono a rischio la stessa sopravvivenza.
Search for the Pair Production of Dark Particles $X$ with $K_L^0 \to XX$, $X \to γγ$
Creators: name: Lin, C.
name: Ahn, J. K.
name: Choi, J. M.
name: Farrington, M. S.
name: Gonzalez, M.
name: Grethen, N.
name: Hsiung, Y. B.
name: Inagaki, T.
name: Kamiji, I.
name: Kim, E. J.
name: Kim, J. L.
name: Kim, H. M.
name: Kawata, K.
name: Kitagawa, A.
name: Komatsubara, T. K.
name: Kotera, K.
name: Lee, S. K.
name: Lee, J. W.
name: Lim, G. Y.
name: Luo, Y.
name: Matsumura, T.
name: Nakagiri, K.
name: Nanjo, H.
name: Nomura, T.
name: Ono, K.
name: Redeker, J. C.
name: Sato, T.
name: Sasse, V.
name: Shibata, T.
name: Shimizu, N.
name: Shinkawa, T.
name: Shinohara, S.
name: Shiomi, K.
name: Shiraishi, R.
name: Suzuki, S.
name: Tajima, Y.
name: Tung, Y. -C.
name: Wah, Y. W.
name: Watanabe, H.
name: Wu, T.
name: Yamanaka, T.
name: Yoshida, H. Y.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present the first search for the pair production of dark particles $X$ via $K_L^0\to XX$ with $X$ decaying into two photons using the data collected by the KOTO experiment. No signal was observed in the mass range of 40 - 110 MeV/c$^2$ and 210 - 240 MeV/c$^2$. This sets upper limits on the branching fractions as $\mathcal{B}(K_L^0 \to XX)$ $<$ (1-4) $\times$ 10$^{-7}$ and $\mathcal{B}(K_L^0 \to XX)$ $<$ (1-2) $\times$ 10$^{-6}$ at the 90% confidence level for the two mass regions, respectively.
Comparing the spectral lag of short and long gamma-ray bursts and its relation with the luminosity
Creators: name: Bernardini, M. G.
name: Ghirlanda, G.
name: Campana, S.
name: Covino, S.
name: Salvaterra, R.
name: Atteia, J. -L.
name: Burlon, D.
name: Calderone, G.
name: D'Avanzo, P.
name: D'Elia, V.
name: Ghisellini, G.
name: Heussaff, V.
name: Lazzati, D.
name: Melandri, A.
name: Nava, L.
name: Vergani, S. D.
name: Tagliaferri, G.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We investigated the rest frame spectral lags of two complete samples of bright long (50) and short (6) gamma-ray bursts (GRB) detected by Swift. We analysed the Swift/BAT data through a discrete cross-correlation function (CCF) fitted with an asymmetric Gaussian function to estimate the lag and the associated uncertainty. We find that half of the long GRBs have a positive lag and half a lag consistent with zero. All short GRBs have lags consistent with zero. The distributions of the spectral lags for short and long GRBs have different average values. Limited by the small number of short GRBs, we cannot exclude at more than 2 sigma significance level that the two distributions of lags are drawn from the same parent population. If we consider the entire sample of long GRBs, we do not find evidence for a lag-luminosity correlation, rather the lag-luminosity plane appears filled on the left hand side, thus suggesting that the lag-luminosity correlation could be a boundary. Short GRBs are consistent with the long ones in the lag-luminosity plane.
description: 11 pages, 6 figures, 2 tables, accepted for publication in MNRAS
Annihilating Asymmetric Dark Matter
Creators: name: Bell, Nicole F.
name: Horiuchi, Shunsaku
name: Shoemaker, Ian M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The relic abundance of particle and antiparticle dark matter (DM) need not be vastly different in thermal asymmetric dark matter (ADM) models. By considering the effect of a primordial asymmetry on the thermal Boltzmann evolution of coupled DM and anti-DM, we derive the requisite annihilation cross section. This is used in conjunction with CMB and Fermi-LAT gamma-ray data to impose a limit on the number density of anti-DM particles surviving thermal freeze-out. When the extended gamma-ray emission from the Galactic Center is reanalyzed in a thermal ADM framework, we find that annihilation into $τ$ leptons prefer anti-DM number densities 1-4$\%$ that of DM while the $b$-quark channel prefers 50-100$\%$.
description: 7 pages, 5 figures
Self-Similarity Among Energy Eigenstates
Creators: name: Zhang, Zhelun
name: Wang, Zhenduo
name: Wu, Biao
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In a quantum system, different energy eigenstates have different properties or features, allowing us define a classifier to divide them into different groups. We find that the ratio of each type of energy eigenstates in an energy shell $[E_{c}-ΔE/2,E_{c}+ΔE/2]$ is invariant with changing width $ΔE$ or Planck constant $\hbar$ as long as the number of eigenstates in the shell is statistically large enough. We give an argument that such self-similarity in energy eigenstates is a general feature for all quantum systems, which is further illustrated numerically with various quantum systems, including circular billiard, double top model, kicked rotor, and Heisenberg XXZ model.
description: 14 pages, 14 figures
Kommilitonen! Ein Student ist von der Polizei erschossen worden.; 1967
Creators: name: (:Unav)
Publisher: name: Universitätsbibliothek der Technischen Universität Berlin
Year: 2018
Subjects: Gewaltsamer Tod von Benno Ohnesorg

description: Enthält: Darstellung des gewaltsamen Todes von Benno Ohnesorg und der nachfolgenden Ereignisse aus Sicht der Gewerkschaftlichen Studenten Gruppe an der TU Berlin.- Boykott der Lehrveranstaltungen an der TU Berlin und Freien Universität.- Aufforderung zur Teilnahme an der öffentlichen Sitzung des Studentenparlaments der TU Berlin. 1 Seite. S/w.
Structural Changes Related to the Magnetic Transitions in Hexagonal InMnO3
Creators: name: Yu, T.
name: Tyson, T. A.
name: Gao, P.
name: Wu, T.
name: Hong, X.
name: Ghose, S.
name: Chen, Y. -S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Two magnetic ordering transitions are found in InMnO3, the paramagnetic to antiferromagnetic transition near ~118 K and a lower possible spin rotation transition near ~42 K. Multiple length scale structural measurements reveal enhanced local distortion found to be connected with tilting of the MnO5 polyhedra as temperature is reduced. Strong coupling is observed between the lattice and the spin manifested as changes in the structure near both of the magnetic ordering temperatures (at ~42 K and ~ 118 K). External parameters such as pressure are expected to modify the coupling.
description: 14 Figures
The importance of measuring baseline tumour volume (or alternatively tumour length along with its rectal circumferential extent) in the watch-and-wait strategy in rectal cancer: a review
Creators: name: Hołdakowska, Anna
name: Gerard, Jean-Pierre
name: Bujko, Krzysztof
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biophysics
subject: Medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Cancer
subject: Science Policy

description: The impact of the tumour volume or size on achieving clinical complete response (cCR) after radio(chemo)therapy is poorly understood. A literature search was performed to gather data on the predictive value of baseline tumour volume or size in achieving cCR. In total, nine reports were identified. In two of three studies evaluating the baseline tumour volumetry, the tumour volume was the most powerful predictor for cCR. In four of six studies evaluating baseline tumour size without volumetry, tumour dimension was significantly associated with cCR, in one study reached borderline significance and in one report was insignificant. In three of four studies where a multivariable analysis was performed, the cT category did not show an independent predictive value for cCR. Because the tumour shape is often (semi)annular, its circumferential rectal extent along with the tumour length probably impact the tumour volume most, and thus, could be considered an acceptable alternative for time-consuming volumetry. Our review suggests that baseline tumour volume (or alternatively, tumour length along with its circumferential rectal extent) is the most relevant clinical predictor of cCR. Therefore, we postulate assessing and reporting these parameters in studies on the watch-and-wait strategy.
The role of interaction-induced tunneling in the dynamics of polar lattice bosons
Creators: name: Aramthottil, Adith Sai
name: Łącki, Mateusz
name: Santos, Luis
name: Zakrzewski, Jakub
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Inter-site dipolar interactions induce, even in absence of disorder, an intriguing non-ergodic dynamics for dipolar bosons in an optical lattice. We show that the inherent dipole-induced density-dependent tunneling, typically neglected, plays a crucial role in this dynamics. For shallow-enough lattices, the delocalization stemming from the interaction-induced hopping overcomes the localization induced by inter-site interactions. As a result, in stark contrast to the more studied case of hard-core bosons, delocalization is counter-intuitively strengthen when the dipolar strength increases. Furthermore, the quasi-cancellation between bare and interaction-induced tunneling may lead, near a lattice-depth-dependent value of the dipole strength, to an exact decoupling of the Hilbert space between ergodic hard-core states and strongly non-ergodic soft-core ones. Our results show that interaction-induced hopping should play a crucial role in future experiments on the dynamics of polar lattice gases.
description: AAM version close to that published
Schreiten Sie zur Wahl; 1965
Creators: name: (:Unav)
Publisher: name: Universitätsbibliothek der Technischen Universität Berlin
Year: 2018

description: Enthält: Karikatur als Aufforderung, sich an der Wahl zum 20. Studentenparlament vom 31. Mai bis 3. Juni 1965 zu beteiligen. 1 Seite. Skizze eines laufenden Mannes, s/w.
Edge and corner superconductivity in a 2D topological model
Creators: name: Wang, Ying
name: Rai, Gautam
name: Haas, Stephan
name: Jagannathan, Anuradha
Publisher: name: arXiv
Year: 2022
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We consider a two-dimensional generalization of the Su-Schrieffer-Heeger model which is known to possess a non-trivial topological band structure. For this model, which is characterized by a single parameter, the hopping ratio $0 \leq r\leq 1$, the inhomogeneous superconducting phases induced by an attractive $U$ Hubbard interaction are studied using mean field theory. We show, analytically and by numerical diagonalization, that in lattices with open boundaries, phases with enhanced superconducting order on the corners or the edges can appear, depending on the filling. For finite samples at half filling, the corner site superconducting transition temperature can be much larger than that of the bulk. A novel proximity effect thus arises for $T_{c,bulk} < T