cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Spectra of helium clusters with up to six atoms using soft core potentials
Creators: name: Gattobigio, M.
name: Kievsky, A.
name: Viviani, M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In this work we investigate small clusters of helium atoms using the hyperspherical harmonic basis. We consider systems with $A=2,3,4,5,6$ atoms with an inter-particle potential which does not present a strong repulsion at short distances. We use an attractive gaussian potential that reproduces the values of the dimer binding energy, the atom-atom scattering length, and the effective range obtained with one of the widely used He-He interactions, the LM2M2 potential. In systems with more than two atoms we consider a repulsive three-body force that, by construction, reproduces the trimer binding energy of the LM2M2 potential. With this model, consisting in the sum of a two- and three-body potential, we have calculated the spectrum of clusters formed by four, five and six helium atoms. We have found that these systems present two bound states, one deep and one shallow close to the threshold fixed by the energy of the $(A-1)$-atom system. Universal relations between the energies of the excited state of the $A$-atom system and the ground state energy of the $(A-1)$-atom system are extracted as well as the ratio between the ground state of the $A$-atom system and the ground state energy of the trimer.
Exotic Higgs boson decay modes as a harbinger of $S_3$ flavor symmetry
Creators: name: Bhattacharyya, Gautam
name: Leser, Philipp
name: Päs, Heinrich
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Discrete symmetries employed to explain flavor mixing and mass hierarchies can be associated with an enlarged scalar sector which might lead to exotic Higgs decay modes. In this paper, we explore such a possibility in a scenario with $S_3$ flavor symmetry which requires three scalar SU(2) doublets. The spectrum is fixed by minimizing the scalar potential, and we observe that the symmetry of the model leads to tantalizing Higgs decay modes potentially observable at the CERN Large Hadron Collider (LHC).
description: v2: 7 pages, 5 eps figures, to appear as a Rapid Communication in Physical Review D (Title expanded in journal)
The $α$-dependence of stochastic differential equations driven by variants of $α$-stable processes
Creators: name: da Silva, Jose Luis
name: Erraoui, Mohamed
Publisher: name: arXiv
Year: 2010
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: In this paper we investigate two variants of $α$-stable processes, namely tempered stable subordinators and modified tempered stable process as well as their renormalization. We study the weak convergence in the Skorohod space and prove that they satisfy the uniform tightness condition. Finally, applications to the $α$-dependence of the solutions of SDEs driven by these processes are discussed.
description: 20 pages
Transport moments beyond the leading order
Creators: name: Berkolaiko, Gregory
name: Kuipers, Jack
Publisher: name: arXiv
Year: 2010
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: For chaotic cavities with scattering leads attached, transport properties can be approximated in terms of the classical trajectories which enter and exit the system. With a semiclassical treatment involving fine correlations between such trajectories we develop a diagrammatic technique to calculate the moments of various transport quantities. Namely, we find the moments of the transmission and reflection eigenvalues for systems with and without time reversal symmetry. We also derive related quantities involving an energy dependence: the moments of the Wigner delay times and the density of states of chaotic Andreev billiards, where we find that the gap in the density persists when subleading corrections are included. Finally, we show how to adapt our techniques to non-linear statistics by calculating the correlation between transport moments. In each setting, the answer for the $n$-th moment is obtained for arbitrary $n$ (in the form of a moment generating function) and for up to the three leading orders in terms of the inverse channel number. Our results suggest patterns which should hold for further corrections and by matching with the low order moments available from random matrix theory we derive likely higher order generating functions.
description: Refereed version. 43 pages, 10 figures
An Analytic Analysis of Phase Transitions in Holographic Superconductors
Creators: name: Chen, Chiang-Mei
name: Wu, Ming-Fan
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Using a simple analytic approach, we study the universal properties of second-order phase transition in holographic superconductor models. We explore a general model in arbitrary dimensions in which the condensation occurs via the Stückelberg spontaneous symmetry breaking mechanism. All the possible second-order phase transitions and their universal characteristics can be identified analytically. The relationship between the critical temperature and charge density is generic, and the critical exponents can be greater than the typical mean field value 1/2. In addition, the related numerical factors can also be computed qualitatively.
description: 9 pages; revised version to appear in PTP
Noise and microresonance of critical current in Josephson junction induced by Kondo trap states
Creators: name: Ansari, Mohammad H.
name: Wilhelm, Frank K.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We analyze the impact of trap states in the oxide layer of a superconducting tunnel junctions, on the fluctuation of the Josephson critical current, thus on coherence in superconducting qubits. Two mechanisms are usually considered: the current blockage due to repulsion at the occupied trap states, and the noise from electrons hopping across a trap. We extend previous studies of noninteracting traps to the case where the traps have on-site electron repulsion inside one ballistic channel. The repulsion not only allows the appropriate temperature dependence of 1/f noise, but also is a control to the coupling between the computational qubit and the spurious two-level systems inside the oxide dielectric. We use second order perturbation theory which allows to obtain analytical formulae for the interacting bound states and spectral weights, limited to small and intermediate repulsions. Remarkably, it still reproduces the main features of the model as identified from the Numerical Renormalization Group. We present analytical formulations for the subgap bound state energies, the singlet-doublet phase boundary, and the spectral weights. We show that interactions can reverse the supercurrent across the trap. We finally work out the spectrum of junction resonators for qubits in the presence of on-site repulsive electrons and analyze its dependence on microscopic parameters that may be controlled by fabrication.
description: 19 pages, 9 figures, proposed experiments, added 2 references
On sub-ideal causal smoothing filters
Creators: name: Dokuchaev, Nikolai
Publisher: name: arXiv
Year: 2010
Subjects: subject: Optimization and Control (math.OC)
subject: Systems and Control (eess.SY)
subject: Classical Analysis and ODEs (math.CA)
subject: Spectral Theory (math.SP)
subject: FOS: Mathematics
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: 42A38, 93E11, 93E10, 42B30

description: Smoothing causal linear time-invariant filters are studied for continuous time processes. The paper suggests a family of causal filters with almost exponential damping of the energy on the higher frequencies. These filters are sub-ideal meaning that a faster decay of the frequency response would lead to the loss of causality.
Erwin Bünnings hundertster Geburtstag
Creators: name: Engelmann, Wolfgang
Publisher: name: Universität Tübingen
Year: 2019
Subjects: subject: Chronobiologie
subject: 570

description: Bünning war ein großer Pflanzenphysiologe und ein Vater der Chronobiologie, der an der Universität Tübingen lehrte. Den hundertsten Geburtstag von Erwin Bünning feierte die Fakultät Biologie der Universität Tübingen am 23. Januar 2006. Ein Festvortrag von Frau Helfrich-Förster, Regensburg und von Anand D. Karve, Puna (Indien) ist zusammengefasst, Bünnings Lebenslauf und seine Interessens- und Arbeitsgebiete erwähnt. Vorträge, Artikel von und über Bünning (Rektoratsantritt 1952 und Rektoratsrede 1953, Bünning über Pfeffer, seine Antrittsrede bei der Heidelberger Akademie, eine Rede von Schwemmle zum 70. Geburtstag Bünnings, ein Vortrag von Haupt 1990, Auzüge aus einem Vortrag von Mohr 1987, Rede von Chandrashekaran 1985 zum 80. Geburtstag, Berichte von Tazawa 2006, Baillaud 2006, Chandrashekaran 2006). Bünnings Gedanken zur Bildung, seine Reisen (Nord-Sumatra, Indonesien, Salzgebirge in Pakistan, Steppen-, Sand- und Salzwüsten im Stromgebiet des Indus, Chittangong-Hill-Tracts, Pflanzenleben in der Arktis). Nachrufe von Haupt, Schwemmle, Chandrashekaran, Masuda, Tazawa, Engelmann. Es folgen Bünning-Stories und ein Literaturverzeichnis.
Supplementary material from "Automated extraction of seed morphological traits from images".
Creators: name: Dayrell, Roberta L C
name: Ott, Tankred
name: Horrocks, Tom
name: Poschlod, Peter
Publisher: name: figshare
Year: 2023
Subjects: Plant biology not elsewhere classified

description: Original data from: Dayrell RLC, Ott T, Horrocks T, Poschlod P (2023) Automated extraction of seed morphological traits from images.
 Content description:
 - Dayrell et al suppl material_Appendix S1-S4.pdf Appendix S1: Detailed information on measurements extracted by Traitor. Appendix S2: Detailed methods for Sections 3.2, 3.3, and 3.4. R scripts for the analyses are available on Github (https://github.com/rdayrell/Traitor_analyses.git). Appendix S3: Figure representing colour variation within and among seeds of Fragaria vesca within the DiasMorph dataset. Appendix S4: Categorisation of standardised seed outlines of Carex spp. (n = 56) within the DiasMorph dataset.
 - manual_measurements.csv Contains the average manual measurements obtained from seeds of Central Europe. Five seeds from each taxon were measured with the aid of a stereo microscope (Stemi SV 11, Carl Zeiss Jena GmbH, Germany).
 - colour_humans_Rosaceae_hex_table.csv Colour measurements (HEX code) of taxa from the Rosaceae family. ‘Median’: channel-wise median. ‘Min median’ and ‘max median’: extremes of median colour range of each taxon based on a PCA. ‘Colour 1’ and ‘colour 2’: channel-wise median of the two most dominant colours in the seeds.
The impact of evolving infrared spectral energy distributions of galaxies on star formation rate estimates
Creators: name: Nordon, R.
name: Lutz, D.
name: Genzel, R.
name: Berta, S.
name: Wuyts, S.
name: Magnelli, B.
name: Altieri, B.
name: Andreani, P.
name: Aussel, H.
name: Bongiovanni, A.
name: Cepa, J.
name: Cimatti, A.
name: Daddi, E.
name: Fadda, D.
name: Schreiber, N. M. Forster
name: Lagache, G.
name: Maiolino, R.
name: Garcia, A. M. Perez
name: Poglitsch, A.
name: Popesso, P.
name: Pozzi, F.
name: Rodighiero, G.
name: Rosario, D.
name: Saintonge, A.
name: Sanchez-Portal, M.
name: Santini, P.
name: Sturm, E.
name: Tacconi, L. J.
name: Valtchanov, I.
name: Yan, L.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We combine Herschel-PACS data from the PEP program with Spitzer 24 um and 16 um photometry and ultra deep IRS mid-infrared spectra, to measure the mid- to far-infrared spectral energy distribution (SED) of 0.7
description: 25 pages, 15 figures, accepted to ApJ; v3 include many minor modifications following the referee report, added a section comparing various z~2 IR template calibrations
Squeezed K^+ K^- correlations in high energy heavy ion collisions
Creators: name: Dudek, Danuce M.
name: Padula, Sandra S.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The hot and dense medium formed in high energy heavy ion collisions may modify some hadronic properties. In particular, if hadron masses are shifted in-medium, it was demonstrated that this could lead to back-to-back squeezed correlations (BBC) of particle-antiparticle pairs. Although well-established theoretically, the squeezed correlations have not yet been discovered experimentally. A method has been suggested for the empirical search of this effect, which was previously illustrated for phi-phi pairs. We apply here the formalism and the suggested method to the case of K^+ K^- pairs, since they may be easier to identify experimentally. The time distribution of the emission process plays a crucial role in the survival of the BBC's. We analyze the cases where the emission is supposed to occur suddenly or via a Lorentzian distribution, and compare with the case of a Levy distribution in time. Effects of squeezing on the correlation function of identical particles are also analyzed.
description: 9 pages and 6 figures (figures 2 to 6 contain 4 plots each). Paragraph added to text, figures 2 to 6 revised for improving visualization
Developing locomotion skills with deep reinforcement learning
Creators: name: Peng, Xue Bin
Publisher: name: University of British Columbia
Year: 2017

description: While physics-based models for passive phenomena such as cloth and fluids have been widely adopted in computer animation, physics-based character simulation remains a challenging problem. One of the major hurdles for character simulation is that of control, the modeling of a character's behaviour in response to its goals and environment. This challenge is further compounded by the high-dimensional and complex dynamics that often arise from these systems. A popular approach to mitigating these challenges is to build reduced models that capture important properties for a particular task. These models often leverage significant human insight, and may nonetheless overlook important information. In this thesis, we explore the application of deep reinforcement learning (DeepRL) to develop control policies that operate directly using high-dimensional low-level representations, thereby reducing the need for manual feature engineering and enabling characters to perform more challenging tasks in complex environments. We start by presenting a DeepRL framework for developing policies that allow character to agilely traverse across irregular terrain. The policies are represented using a mixture of experts model, which selects from a small collection of parameterized controllers. Our method is demonstrated on planar characters of varying morphologies and different classes of terrain. Through the learning process, the networks develop the appropriate strategies for traveling across various irregular environments without requiring extensive feature engineering. Next, we explore the effects of different action parameterizations on the performance of RL policies. We compare policies trained using low-level actions, such as torques, target velocities, target angles, and muscle activations. Performance is evaluated using a motion imitation benchmark. For our particular task, the choice of higher-level actions that incorporate local feedback, such as target angles, leads to significant improvements in performance and learning speed. Finally, we describe a hierarchical reinforcement learning framework for controlling the motion of a simulated 3D biped. By training each level of the hierarchy to operate at different spatial and temporal scales, the character is able to perform a variety of locomotion tasks that require a balance between short-term and long-term planning. Some of the tasks include soccer dribbling, path following, and navigation across dynamic obstacles.
Theory for Magnetism and Triplet Superconductivity in LiFeAs
Creators: name: Brydon, P. M. R.
name: Daghofer, M.
name: Timm, C.
name: Brink, J. van den
Publisher: name: arXiv
Year: 2010
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Superconducting pnictides are widely found to feature spin-singlet pairing in the vicinity of an antiferromagnetic phase, for which nesting between electron and hole Fermi surfaces is crucial. LiFeAs differs from the other pnictides by (i) poor nesting properties and (ii) unusually shallow hole pockets. Investigating magnetic and pairing instabilities in an electronic model that incorporates these differences, we find antiferromagnetic order to be absent. Instead we observe almost ferromagnetic fluctuations which drive an instability toward spin-triplet p-wave superconductivity.
description: Published version
Classification of Kac representations in the logarithmic minimal models LM(1,p)
Creators: name: Rasmussen, Jorgen
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: For each pair of positive integers r,s, there is a so-called Kac representation (r,s) associated with a Yang-Baxter integrable boundary condition in the lattice approach to the logarithmic minimal model LM(1,p). We propose a classification of these representations as finitely-generated submodules of Feigin-Fuchs modules, and present a conjecture for their fusion algebra which we call the Kac fusion algebra. The proposals are tested using a combination of the lattice approach and applications of the Nahm-Gaberdiel-Kausch algorithm. We also discuss how the fusion algebra may be extended by inclusion of the modules contragredient to the Kac representations, and determine polynomial fusion rings isomorphic to the conjectured Kac fusion algebra and its contragredient extension.
description: 31 pages, v2: comments, subsection and references added
The B ---> π K puzzle and the Bulk Randall-Sundurm model
Creators: name: Chang, Sanghyeon
name: Kim, C. S.
name: Song, Jeonghyeon
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The recent measurements of the direct CP asymmetries ($A_{CP}$) in the penguin-dominated $B\to K π$ decays show some discrepancy from the standard model (SM) prediction. While $A_{CP}$ of $B^+ \to π^0 K^+$ and that of $B^0 \to π^- K^+$ in the naive estimate of the SM are expected to have very similar values, their experimental data are of the opposite sign and different magnitudes. We study the effects of the custodial bulk Randall-Sundrum model on this $A_{CP}$. In this model, the misalignment of the five-dimensional (5D) Yukawa interactions to the 5D bulk gauge interactions in flavor space leads to tree-level flavor-changing neutral current by the Kaluza-Klein gauge bosons. In a large portion of the parameter space of this model, the observed nonzero $A_{CP}(B^+ \to π^0 K^+) - A_{CP}(B^0 \to π^- K^+)$ can be explained only with low Kaluza-Klein mass scale $M_{KK}$ around 1 TeV. Rather extreme parameters is required to explain it with $M_{KK}\simeq 3\tev$. The new contributions to well-measured branching ratios of $B \to K π$ decays are also shown to be suppressed.
description: 18 pages, 2 figures
Symposium Biometrie und Flughafensicherheit
Creators: name: (:Unkn) Unknown
Publisher: name: Universität Tübingen
Year: 2004
Subjects: subject: Prävention , Biometrie , Flughafen , Sicherheit
subject: 360

description: Das Symposium "Biometrie und Flughafensicherheit" fand auf Einladung des Deutschen Forums für Kriminalprävention – DFK – am 31. März 2004 in Berlin in der Bundesdruckerei statt. Sie führte eine große Zahl von Interessierten aus der Politik, vor allem aber auch der Industrie, den Flughäfen und Fluggesellschaften, den Polizeibehörden und dem Datenschutz zusammen, um gemeinsam über den vorgelegten Diskussionsbeitrag des DFK-Arbeitskreises Kriminalprävention und Biometrie sowie damit im Zusammenhang stehende Fragen zu diskutieren.
Precise Predictions for W + 4 Jet Production at the Large Hadron Collider
Creators: name: Berger, C. F.
name: Bern, Z.
name: Dixon, L. J.
name: Cordero, F. Febres
name: Forde, D.
name: Gleisberg, T.
name: Ita, H.
name: Kosower, D. A.
name: Maitre, D.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present the first next-to-leading order QCD results for W + 4-jet production at hadron colliders. Total cross sections, as well as distributions in the jet transverse momenta and in the total transverse energy H_T are provided for the initial LHC energy of \sqrt{s} = 7 TeV. We use a leading-color approximation, known to be accurate to 3% for W production with fewer jets. The virtual matrix elements and the most complicated real-emission matrix elements are handled by the BlackHat library, based on on-shell methods. The remaining parts of the calculation, including the integration over phase space, are performed by the SHERPA package.
description: 5 pages, 3 figures, 2 tables. v2: W^+ + 4 jets NLO results added, plus minor typo corrections
Die Wirksamkeit der Videoüberwachung
Creators: name: Lösel, Friedrich
name: Plankensteiner, Birgit
Publisher: name: Universität Tübingen
Year: 2005
Subjects: subject: Videoüberwachung , Evaluation
subject: 360

description: Die Videoüberwachung öffentlicher Räume ist in vielen Ländern eine aktuelle Maßnahme zur Prävention von Straftaten. Um einen wissenschaftlich fundierten Beitrag zur präventiven Wirkung der Videoüberwachung zu liefern, wurde von Welsh & Farrington (2003, 2004) eine systematische Analyse der besten Evaluationsstudien durchgeführt. Von insgesamt 49 Evaluationsstudien erfüllten 22 die strikten Selektionskriterien. Eine quantitative Auswertung und Integration der Ergebnisse war bei 19 Studien möglich. In ihnen wurde die Videoüberwachung mit Kontrollgebieten verglichen, in denen keine Überwachung stattgefunden hatte. Es zeigte sich eine durchschnittlich um 21 Prozent größere Verringerung der Kriminalität in den Arealen mit Videoüberwachung (englisch: Closed Circuit Television; CCTV). Die Befunde wurden zum einen nach verschiedenen Einsatzbereichen differenziert (Stadtzentren, Wohngebiete, öffentlicher Nahverkehr, Parkhäuser). Zum andern wurden verschiedene Formen der Kriminalität betrachtet. Am wirksamsten war CCTV in Parkhäusern, wo vor allem Diebstähle von und aus Kraftfahrzeugen um zirka 40% reduziert wurden. Dies galt insbesondere bei Kombination mit verbesserter Beleuchtung und deutlichen Hinweisen auf die Videoüberwachung. In Stadtzentren und Wohngebieten sowie im öffentlichen Nahverkehr hatte die Videoüberwachung nur geringen oder keinen signifikanten Effekt auf die Kriminalität. Es ergab sich auch kein Erfolg hinsichtlich der Verringerung von Gewaltdelikten. CCTV war in Großbritannien erfolgreicher als in Nordamerika, wo die Maßnahme seltener eingesetzt wurde. Kriminalitätsverschiebungen auf nicht überwachte Gebiete schienen keine große Rolle zu spielen. Insgesamt fielen die Ergebnisse der einzelnen Studien aber so unterschiedlich aus, dass mehr kontrollierte Forschung erforderlich ist. Für die deutsche Kriminalpolitik ergibt sich zum einen die Folgerung, dass die Videoüberwachung nach verschiedenen Einsatzbereichen differenziert werden muss. Zum andern sind mehr eigene, gut kontrollierte Evaluationsstudien erforderlich.
The Integral Cluster Category
Creators: name: Keller, Bernhard
name: Scherotzke, Sarah
Publisher: name: arXiv
Year: 2010
Subjects: subject: Representation Theory (math.RT)
subject: Category Theory (math.CT)
subject: FOS: Mathematics

description: Integral cluster categories of acyclic quivers have recently been used in the representation-theoretic approach to quantum cluster algebras. We show that over a principal ideal domain, such categories behave much better than one would expect: They can be described as orbit categories, their indecomposable rigid objects do not depend on the ground ring and the mutation operation is transitive.
description: 17 pages, new section added, references added
Pädagogik und Prävention: Möglichkeiten und Grenzen der Erziehungs- und Familienberatungsstellen
Eine Erhebung zu Rahmenbedingungen, zur Prävention und zur Kooperation
Creators: name: Günther, Manfred
name: Braunert, Sebastian
Publisher: name: Universität Tübingen
Year: 2008
Subjects: subject: Familienberatung , Erziehungsberatung , Prävention
subject: 360

description: Die große Bedeutung der primären Prävention durch u.a. gelungene Erziehungsprozesse in den Familien ist unstrittig. Hierbei nehmen im staatlichen Unterstützungssystem die Erziehungs- und Familienberatungsstellen (im Folgenden immer als EFB abgekürzt) eine wichtige Funktion ein. Das von der WHO bereits 1956 formulierte Idealverhältnis von Kapazitäten an EFB zur Einwohnerzahl ist in der Bundesrepublik Deutschland bis heute nicht erfüllt. Dabei nehmen angesichts veränderter Lebensumstände und Familienstrukturen Erziehungsfragen und -probleme deutlich zu. EFB werden – nicht zuletzt durch die Auswirkungen der Kindschaftsrechtsreform aus dem Jahre 1998 und des Gesetzes zur Ächtung von Gewalt aus dem Jahre 2000 - immer stärker in Anspruch genommen. Dies geht leider einher mit Einschränkungen in der Finanzierung. In mehreren Bundesländern wurden EFB-Mittel für das Jahr 2004 zurückgefahren. Zu den Qualitätsstandards ist festzustellen, dass es trägerübergreifend einen hohen fachlichen Konsens über Standards gibt. Im März 2004 wurden von der Jugendministerkonferenz zusätzliche moderne Online-Beratungsangebote beschlossen. Der Aufsatz beschreibt zunächst den Untersuchungsansatz des DFK. Von den über 1000 Beratungsstellen haben 60% an der Erhebung teilgenommen. Wir stellen die Erhebungsergebnisse zu Fragen der Prävention und Kooperation, der Wartezeiten und der zukünftigen Möglichkeiten vor. EFB erfüllen einen bundesgesetzlichen Auftrag und bieten sich u. E. auch für werbende, niedrigschwellige, hinausreichende und somit offensiv präventive Angebote für potentiell gefährdete Familien und Jugendliche an.
The Heat Kernel on $AdS$
Creators: name: Gopakumar, Rajesh
name: Gupta, Rajesh Kumar
name: Lal, Shailesh
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We explicitly evaluate the heat kernel for the Laplacian of arbitrary spin tensor fields on the thermal quotient of (Euclidean) $AdS_N$ for $N\geq 3$ using the group theoretic techniques employed for $AdS_3$ in arXiv:0911.5085. Our approach is general and can be used, in principle, for other quotients as well as other symmetric spaces.
description: Added references, added appendix on heat kernel in even dimension
Entwicklungsförderung & Gewaltprävention 2014
Aktuelle Beiträge aus Wissenschaft und Praxis
Creators: name: (:Unkn) Unknown
Publisher: name: Universität Tübingen
Year: 2015
Subjects: subject: Schule , Familie , Prävention , Gewalt
subject: 360

description: Zweitveröffentlichung
X-ray Constraints on the Lyman-Alpha Escape Fraction
Creators: name: Zheng, Zhen-Ya
name: Malhotra, Sangeeta
name: Wang, Jun-Xian
name: Rhoads, James E.
name: Finkelstein, Steven L.
name: Gawiser, Eric
name: Gronwall, Caryl
name: Guaita, Lucia
name: Nilsson, Kim K.
name: Ciardullo, Robin
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: We have coadded X-ray flux of all known Lyman Alpha Emitters (LAEs) in the 4 Msec Chandra Deep Field South (CDF-S) region, to place sensitive upper limits on the average unobscured star-formation rate (SFR_X) in these galaxies. A very small fraction of Lyman-Alpha galaxies in the field are individually detected in the X-rays, implying a low fraction of AGN activity. After excluding the few X-ray detected LAEs, we stack the undetected LAEs located in the 4 Ms CDF-S data and 250 ks Extended CDF-S (ECDFS) data, and compute a 1-σupper limit on SFR_X < 14, 28, 28, 140, 440, 880 M$_{\sun}$ yr$^{-1}$ for LAEs located at z = 2.1, 3.1, 3.2, 4.5, 5.7 and 6.5, respectively. The upper limit of SFR_X in LAEs can be then be compared to SFR$_{Lyα}$ derived from Lyman-Alpha line and thus can constrain on the Lyman-Alpha escape fraction ($f^{Esc}_{Lyα}$). We derive a lower limit on f(Lyman-Alpha Escape) > 14% (84 % confidence level, 1-σlower limit) for LAEs at redshift z ~ 2.1 and z ~ 3.1-3.2. At z > 4, the current LAE samples are not of sufficient size to constrain SFR_X well. By averaging all the LAEs at z> 2, the X-ray non-detection constrains f(Lyman-Alpha Escape) > 17% (84 % confidence level, 1-σlower limit), and rejects f(Lyman-Alpha Escape) < 5.7% at the 99.87% confidence level from 2.1 < z < 6.5.
description: 11 pages, 3 tables, 3 figures, ApJ accepted
Extracting Higgs boson couplings using a jet veto
Creators: name: Cox, Brian
name: Pilkington, Andrew
name: Forshaw, Jeff
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We show that the Higgs boson's effective couplings to gluons and to weak vector bosons can be extracted simultaneously from an analysis of Higgs plus dijet events by studying the dependence of the observed cross-section upon a third-jet veto.
description: 6 pages, 3 figures. Final journal version
Accurate evolutions of inspiralling and magnetized neutron-stars: equal-mass binaries
Creators: name: Giacomazzo, Bruno
name: Rezzolla, Luciano
name: Baiotti, Luca
Publisher: name: arXiv
Year: 2010
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: By performing new, long and numerically accurate general-relativistic simulations of magnetized, equal-mass neutron-star binaries, we investigate the role that realistic magnetic fields may have in the evolution of these systems. In particular, we study the evolution of the magnetic fields and show that they can influence the survival of the hypermassive-neutron star produced at the merger by accelerating its collapse to a black hole. We also provide evidence that even if purely poloidal initially, the magnetic fields produced in the tori surrounding the black hole have toroidal and poloidal components of equivalent strength. When estimating the possibility that magnetic fields could have an impact on the gravitational-wave signals emitted by these systems either during the inspiral or after the merger we conclude that for realistic magnetic-field strengths B
description: 18 pages, 10 figures. Added two new figures (figures 1 and 7). Small modifications to the text to match the version published on Phys. Rev. D
title: Improving robotic manipulation: techniques for object pose estimation, accommodating positional uncertainty, and disassembly tasks from examples
Creators: name: Galaiya, Viral Rasik
Publisher: name: Memorial University of Newfoundland
publisherIdentifier: https://ror.org/04haebc03
publisherIdentifierScheme: ROR
Year: 2024

description: To use robots in more unstructured environments, we have to accommodate for more complexities. Robotic systems need more awareness of the environment to adapt to uncertainty and variability. Although cameras have been predominantly used in robotic tasks, the limitations that come with them, such as occlusion, visibility and breadth of information, have diverted some focus to tactile sensing. In this thesis, we explore the use of tactile sensing to determine the pose of the object using the temporal features. We then use reinforcement learning with tactile collisions to reduce the number of attempts required to grasp an object resulting from positional uncertainty from camera estimates. Finally, we use information provided by these tactile sensors to a reinforcement learning agent to determine the trajectory to take to remove an object from a restricted passage while reducing training time by pertaining from human examples.
Geflüchtete Menschen in Deutschland: Zuwanderung, Lebenslagen, Integration, Kriminalität und Prävention - ein aktueller Überblick im Mai 2016
Creators: name: Haverkamp, Rita
Publisher: name: Universität Tübingen
Year: 2016
Subjects: subject: Zuwanderung , Migration , Flucht , Lebensbedingungen , Integration , Kriminalität , Prävention
subject: 360

description: Zweitveröffentlichung
Bürgergesellschaft in der Krise? Die Zukunft des gesellschaftlichen Zusammenhaltes in Deutschland
Tagung der Bundeszentrale für politische Bildung am 26. Mai 2009 in Berlin. Bericht und Einordnungen
Creators: name: Kahl, Wolfgang
Publisher: name: Universität Tübingen
Year: 2009
Subjects: subject: Kriminalität , Prävention , Symposion , Bericht
subject: 320
subject: 360

description: Zweitveröffentlichung
A preconditioned iterative solver for the scattering solutions of the Schrödinger equation
Creators: name: Zubair, Hisham bin
name: Reps, Bram
name: Vanroose, Wim
Publisher: name: arXiv
Year: 2010
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: The Schrödinger equation defines the dynamics of quantum particles which has been an area of unabated interest in physics. We demonstrate how simple transformations of the Schrödinger equation leads to a coupled linear system, whereby each diagonal block is a high frequency Helmholtz problem. Based on this model, we derive indefinite Helmholtz model problems with strongly varying wavenumbers. We employ the iterative approach for their solution. In particular, we develop a preconditioner that has its spectrum restricted to a quadrant (of the complex plane) thereby making it easily invertible by multigrid methods with standard components. This multigrid preconditioner is used in conjuction with suitable Krylov-subspace methods for solving the indefinite Helmholtz model problems. The aim of this study is to report the feasbility of this preconditioner for the model problems. We compare this idea with the other prevalent preconditioning ideas, and discuss its merits. Results of numerical experiments are presented, which complement the proposed ideas, and show that this preconditioner may be used in an automatic setting.
description: Accepted in Communications in Computational Physics
Logic circuits from zero forcing
Creators: name: Burgarth, Daniel
name: Giovannetti, Vittorio
name: Hogben, Leslie
name: Severini, Simone
name: Young, Michael
Publisher: name: arXiv
Year: 2011
Subjects: subject: Discrete Mathematics (cs.DM)
subject: Emerging Technologies (cs.ET)
subject: Combinatorics (math.CO)
subject: Quantum Physics (quant-ph)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We design logic circuits based on the notion of zero forcing on graphs; each gate of the circuits is a gadget in which zero forcing is performed. We show that such circuits can evaluate every monotone Boolean function. By using two vertices to encode each logical bit, we obtain universal computation. We also highlight a phenomenon of "back forcing" as a property of each function. Such a phenomenon occurs in a circuit when the input of gates which have been already used at a given time step is further modified by a computation actually performed at a later stage. Finally, we point out that zero forcing can be also used to implement reversible computation. The model introduced here provides a potentially new tool in the analysis of Boolean functions, with particular attention to monotonicity.
description: 5 pages, 10 EPS figures
"Even explanations will not help in trusting [this] fundamentally biased system": A Predictive Policing Case-Study
Creators: name: Mehrotra, Siddharth
name: Gadiraju, Ujwal
name: Bittner, Eva
name: van Delden, Folkert
name: Jonker, Catholijn M.
name: Tielman, Myrthe L.
Publisher: name: arXiv
Year: 2025
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: In today's society, where Artificial Intelligence (AI) has gained a vital role, concerns regarding user's trust have garnered significant attention. The use of AI systems in high-risk domains have often led users to either under-trust it, potentially causing inadequate reliance or over-trust it, resulting in over-compliance. Therefore, users must maintain an appropriate level of trust. Past research has indicated that explanations provided by AI systems can enhance user understanding of when to trust or not trust the system. However, the utility of presentation of different explanations forms still remains to be explored especially in high-risk domains. Therefore, this study explores the impact of different explanation types (text, visual, and hybrid) and user expertise (retired police officers and lay users) on establishing appropriate trust in AI-based predictive policing. While we observed that the hybrid form of explanations increased the subjective trust in AI for expert users, it did not led to better decision-making. Furthermore, no form of explanations helped build appropriate trust. The findings of our study emphasize the importance of re-evaluating the use of explanations to build [appropriate] trust in AI based systems especially when the system's use is questionable. Finally, we synthesize potential challenges and policy recommendations based on our results to design for appropriate trust in high-risk based AI-based systems.
description: 33rd ACM Conference on User Modeling, Adaptation and Personalization (UMAP '25), June 16--19, 2025, New York City, NY, USA
3D Object Rotation Using Virtual Trackball with Fixed Reference Axis
Creators: name: González-Toledo, Daniel
name: Cuevas-Rodríguez, María
name: Molina-Tanco, Luis
name: Reyes-Lecuona, Arcadio
Publisher: name: Zenodo
Year: 2018
Subjects: Virtual Trackball, Two Axis Valuator, 3D rotation, 3D interaction.

description: Among the 3D interaction techniques designed in the last decades to examine virtual objects using the mouse, virtual trackballs are especially suitable for overall examination of 3D objects. This experimental study focuses on a specific type among the various virtual trackball techniques: Two-Axis Valuator (TAV) with fixed axis. The classical TAV considers rotations around global X- and Y-axis, but for many applications, like 3D modelling, and many web-based 3D viewers, a special variation of the TAV is implemented, where horizontal displacements of the mouse are mapped to rotation around the fixed vertical axis. This technique is known as TAV with fixed up-vector (Bade, 2005) or just fixed trackball (Rybicki, 2016), and achieves transitive rotations. However, for some objects, there can be another intrinsic axis. For instance, objects like the rotor of a turbine have an intrinsic rotation axis, often horizontal (González-Toledo, 2017). In order to work with these objects, we propose to use a TAV with a generic fixed axis, which is not necessarily vertical. The hypothesis of this study is that the consistency between the object's intrinsic axis and the fixed axis in a TAV interaction will make interaction more natural, as the user's mental model will be a better fit to the interaction technique or, in other words, the level of stimulus-response compatibility will be higher.
Variational density matrix optimization using semidefinite programming
Creators: name: Verstichel, Brecht
name: van Aggelen, Helen
name: Van Neck, Dimitri
name: Ayers, Paul W.
name: Bultinck, Patrick
Publisher: name: arXiv
Year: 2010
Subjects: subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We discuss how semidefinite programming can be used to determine the second-order density matrix directly through a variational optimization. We show how the problem of characterizing a physical or N -representable density matrix leads to matrix-positivity constraints on the density matrix. We then formulate this in a standard semidefinite programming form, after which two interior point methods are discussed to solve the SDP. As an example we show the results of an application of the method on the isoelectronic series of Beryllium.
description: corrected typos, added doi
Supersymmetry Without Prejudice at the LHC
Creators: name: Conley, John A.
name: Gainer, James S.
name: Hewett, JoAnne L.
name: Le, My Phuong
name: Rizzo, Thomas G.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The discovery and exploration of Supersymmetry in a model-independent fashion will be a daunting task due to the large number of soft-breaking parameters in the MSSM. In this paper, we explore the capability of the ATLAS detector at the LHC ($\sqrt s=14$ TeV, 1 fb$^{-1}$) to find SUSY within the 19-dimensional pMSSM subspace of the MSSM using their standard transverse missing energy and long-lived particle searches that were essentially designed for mSUGRA. To this end, we employ a set of $\sim 71$k previously generated model points in the 19-dimensional parameter space that satisfy all of the existing experimental and theoretical constraints. Employing ATLAS-generated SM backgrounds and following their approach in each of 11 missing energy analyses as closely as possible, we explore all of these $71$k model points for a possible SUSY signal. To test our analysis procedure, we first verify that we faithfully reproduce the published ATLAS results for the signal distributions for their benchmark mSUGRA model points. We then show that, requiring all sparticle masses to lie below 1(3) TeV, almost all(two-thirds) of the pMSSM model points are discovered with a significance $S>5$ in at least one of these 11 analyses assuming a 50\% systematic error on the SM background. If this systematic error can be reduced to only 20\% then this parameter space coverage is increased. These results are indicative that the ATLAS SUSY search strategy is robust under a broad class of Supersymmetric models. We then explore in detail the properties of the kinematically accessible model points which remain unobservable by these search analyses in order to ascertain problematic cases which may arise in general SUSY searches.
description: 69 pages, 40 figures, Discussion added
Welfare and Violence: The Relationship Between Direct Government Cash Transfers and Community Rates of Violent Crimes
Creators: name: Castro, Jandrick
Publisher: name: University of Chicago
Year: 2022

description: The relationship between income levels and crime has long been studied by social welfare scholars and poverty-centered academia. It is a relationship that most people intuitively believe to be negative in nature. That is, as personal incomes increase in a community, levels of violent crime decrease. This is the foundational social paradigm upon which western scholars view and study poverty and social welfare policy. It is this intuition that I attempt to test here in my undergraduate thesis. This study examines the relationship between government cash transfers as a means of maintaining incomes and its effects on rates of violent crime. Specifically, I examine public records of communities in the past that have been a part of a governmental cash transfer program directly over a period of time and cross-referencing these *artificial* income injunctions with changes in the rates of violent crime. I run a statistical regression on varying communities of socioeconomic conditions to determine a correlation between government led income growth, non-government led income growth, and rates of violent crimes in the short-run, as well as the long-run; making adjustments for inflation where necessary. I also highlight human voices in this study by conducting interviews on participants of periodic unconditional stimulus within communities of high violence and low-income. Highlighting these voices allowed me to gauge the extent and context in which individuals in low-income areas spend governmental additional wage subsidies. Ultimately, I demonstrated that cash stimuli are useful not only in alleviating community poverty, but also as a statistically significant method of reducing rates of violent crime in the short-run. My findings also demonstrate the means in which cash stimuli proves to temporarily curb violent crimes in communities in which the spending power of individuals are most affected by direct cash infusions. These findings can contribute greatly to the manner by which government resources are directed at alleviating poverty or violent crime. The implications behind statistically significant results in the short-run, imply that government stimulus checks can serve as a powerful temporary remedy in times of social unrest, whereas my qualitative findings demonstrate that the effectiveness of government cash transfers on perceived community levels of safety depends on the means by which such transfers are made equally accessible.
A fundamental equation for Supermassive Black Holes
Creators: name: Feoli, Antonio
name: Mancini, Luigi
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We developed a theoretical model able to give a common origin to the correlations between the mass of supermassive black holes and the mass, velocity dispersion, kinetic energy and momentum parameter of the corresponding host galaxies. Our model is essentially based on the transformation of the angular momentum of the interstellar material, which falls into the black hole, into the angular momentum of the radiation emitted in this process. In this framework, we predict the existence of a relation of the form $M_bh \propto R_e σ^3$, which is confirmed by the experimental data and can be the starting point to understand the other popular scaling laws too.
description: 11 pages, 2 figures, to appear on International Journal of Modern Physics D
HYPODYNAMIA AS A CAUSE OF PROSTATITIS
Creators: name: M.N. Sarkulov
name: O.M. Kurmangaliyev
name: A.T. Mukash
name: T.A. Imzharov
name: T.M. Sarkulov
Publisher: name: Zenodo
Year: 2023

description: In recent decades, the number of office workers has been growing steadily, which is characterized by the development of information technology and labor automation. In this connection, new diseases associated with this work activity appear and increase. We analyzed the features of the course of Chronic prostatitis in office workers, which occurs with a predominance of the congestive form.
Multiple-type solutions for multipole interface solitons in thermal nonlinear media
Creators: name: Ma, Xuekai
name: Yang, Zhenjun
name: Lu, Daquan
name: Hu, Wei
Publisher: name: arXiv
Year: 2011
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We address the existence of multipole interface solitons in one-dimensional thermal nonlinear media with a step in the linear refractive index at the sample center. It is found that there exist two types of solutions for tripole and quadrupole interface solitons. The two types of interface solitons have different profiles, beam widths, mass centers, and stability regions. For a given propagation constant, only one type of interface soliton is proved to be stable, while the other type can also survive over a long distance. In addition, three types of solutions for fifth-order interface solitons are found.
description: 5 pages, 5 figures