cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Lattice potentials and fermions in holographic non Fermi-liquids: hybridizing local quantum criticality
Creators: name: Liu, Yan
name: Schalm, Koenraad
name: Sun, Ya-Wen
name: Zaanen, Jan
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study lattice effects in strongly coupled systems of fermions at a finite density described by a holographic dual consisting of fermions in Anti-de-Sitter space in the presence of a Reissner-Nordstrom black hole. The lattice effect is encoded by a periodic modulation of the chemical potential with a wavelength of order of the intrinsic length scales of the system. This corresponds with a highly complicated "band structure" problem in AdS, which we only manage to solve in the weak potential limit. The "domain wall" fermions in AdS encoding for the Fermi surfaces in the boundary field theory diffract as usually against the periodic lattice, giving rise to band gaps. However, the deep infrared of the field theory as encoded by the near horizon AdS2 geometry in the bulk reacts in a surprising way to the weak potential. The hybridization of the fermions bulk dualizes into a linear combination of CFT1 "local quantum critical" propagators in the bulk, characterized by momentum dependent exponents displaced by lattice Umklapp vectors. This has the consequence that the metals showing quasi-Fermi surfaces cannot be localized in band insulators. In the AdS2 metal regime, where the conformal dimension of the fermionic operator is large and no Fermi surfaces are present at low T/μ, the lattice gives rise to a characteristic dependence of the energy scaling as a function of momentum. We predict crossovers from a high energy standard momentum AdS2 scaling to a low energy regime where exponents found associated with momenta "backscattered" to a lower Brillioun zone in the extended zone scheme. We comment on how these findings can be used as a unique fingerprint for the detection of AdS2 like "pseudogap metals" in the laboratory.
description: 42 pages, 5 figures; v2, minor correction, to appear in JHEP
title: Clinical diagnostic reference levels in computed tomography
Creators: name: Habib Geryes, Bouchra
Publisher: name: ESR EuroSafe Imaging
Year: 2018
Subjects: subject: Action 2 - Clinical diagnostic reference levels (DRLs)
subject: Radioprotection / Radiation dose
subject: CT
subject: Dosimetry
subject: Dosimetric comparison
subject: Quality assurance

description: Background/introduction Description of activity and work performed Conclusion and recommendations Personal/organisational information References
description: Background/introduction: Diagnostic Reference Levels (DRL) in CT procedures are important tools to optimise radiation doses delivered to patients by identifying cases where the levels of doses are unusually high. Patient radiation dose depends on the number of CT phases...
title: Development of clinical diagnostic reference levels using an as-low-as-diagnostically-acceptable image quality approach.
Creators: name: Widmann, Gerlig
Publisher: name: ESR EuroSafe Imaging
Year: 2018
Subjects: subject: Action 2 - Clinical diagnostic reference levels (DRLs)
subject: Action 3 - Image quality assessment based on clinical indications
subject: Head and neck
subject: Trauma
subject: CT
subject: Diagnostic procedure
subject: Experimental investigations
subject: Image verification
subject: Dosimetric comparison

description: Background/introduction Description of activity and work performed Conclusion and recommendations Personal/organisational information References
description: Background/introduction: In craniomaxillofacial computed tomography (CT) images may be obtained using substantially lower doses than the current diagnostic reference level (DRL) in sinus imaging of CTDI vol 8 mGy (Fig. 1) [1]. Purpose was to develop clinical DRLs for...
title: A preliminary study on diagnostic reference levels for endovascular treatment of the iliac arteries
Creators: name: Tzanis, Eleftherios
Publisher: name: ESR EuroSafe Imaging
Year: 2018
Subjects: subject: Action 2 - Clinical diagnostic reference levels (DRLs)
subject: Radioprotection / Radiation dose
subject: Interventional vascular
subject: Fluoroscopy
subject: Angioplasty
subject: Dosimetric comparison

description: Background/introduction Description of activity and work performed Conclusion and recommendations Personal/organisational information References
description: Background/introduction: Diagnostic reference levels (DRLs) were first introduced by the International Commission of Radiation Protection (ICRP) in 1996 [1]. DRLs are a useful tool for the evaluation and optimization of the applied techniques in interventional...
Kierkegaard, L., Nachfolger
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1838

description: Ort: Kopenhagen
description: Verzeichnung=Description=Inventaire 05.07.2020 Automatisiert nach HAN-Import
description: Verzeichnung=Description=Inventaire ISAD(G) / HAN Katalogisierungsregeln für Archivbestände Detailliert
title: Impression of effective doses of MSK examinations in a topclinical teaching hospital
Creators: name: Adriaensen, Miraude
Publisher: name: ESR EuroSafe Imaging
Year: 2018
Subjects: subject: Action 2 - Clinical diagnostic reference levels (DRLs)
subject: Musculoskeletal system
subject: Digital radiography
subject: CT
subject: Absorptiometry / Bone densitometry
subject: Diagnostic procedure
subject: Dosimetric comparison
subject: Quality assurance

description: Background/introduction Description of activity and work performed Conclusion and recommendations Personal/organisational information References
description: Background/introduction: The importance of radiation safety and the awareness of the radiation burden to the population due to medical imaging has been emphasized by the 2013/59/Euratom directive of the European Union and the subsequent adoption of this directive into...
Subordination for the sum of two random matrices
Creators: name: Kargin, V.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: This paper is about the relation of random matrix theory and the subordination phenomenon in complex analysis. We find that the resolvent of the sum of two random matrices is approximately subordinated to the resolvents of the original matrices. We estimate the error terms in this relation and in the subordination relation for the traces of the resolvents. This allows us to prove a local limit law for eigenvalues and a delocalization result for eigenvectors of the sum of two random matrices. In addition, we use subordination to determine the limit of the largest eigenvalue for the rank-one deformations of unitary-invariant random matrices.
description: Published at http://dx.doi.org/10.1214/14-AOP929 in the Annals of Probability (http://www.imstat.org/aop/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Iselin, Frères
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1838

description: Ort: Basel
description: Verzeichnung=Description=Inventaire 05.07.2020 Automatisiert nach HAN-Import
description: Verzeichnung=Description=Inventaire ISAD(G) / HAN Katalogisierungsregeln für Archivbestände Detailliert
Divergences in Scalar Quantum Field Theory: The Cause and the Cure
Creators: name: Klauder, John R.
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: Covariant scalar fields exhibit divergences when quantized in two or more spacetime dimensions: n \geg 2. Does perturbation theory, effective theories, the renormalization group, etc., tell us all there is to know about these problems? An alternative approach identifies the cause of divergences as due to the effort to multiplicatively relate two measures that are mutually singular, while the cure for those divergences is to introduce an O(\hbar) counterterm that converts mutually singular measures into equivalent measures. This procedure leads to a nontrivial, divergence-free formulation for all n \geq 2. Finally, a critical comparison of the new methods with traditional procedures is given.
description: 10 pages. Concise derivation of the unconventional counterterm, critical comparison between the new proposals and traditional methods, final version accepted for publication
The extragalactic heritage of the Layer-Oriented MAD at VLT.
Creators: name: Falomo, R.
name: Ragazzoni, R.
Publisher: name: Proceedings of the AO4ELT2 conference (Publisher: ONERA; Editors: J.-P. Véran, Y. Clénet, T. Fusco)
Year: 2011
Subjects: ADAPTIVE OPTICS
EXTREMELY LARGE TELESCOPES
PATHFINDERS
INSTRUMENTS
WAVEFRONT CORRECTORS
WAVEFRONT SENSING
LASER GUIDE STAR SYSTEMS
ATMOSPHERIC TURBULENCE
REAL-TIME CONTROL
MODELING
POST-PROCESSING

description: The layer-oriented wavefront sensor onboard MAD, capable to catch up to 8 stars on the
pins of pyramids in a 2 arcmin Field of View has been tested at the VLT in a unique
dedicated run lasting 6 consecutive nights. As this kind of MCAO observations is focused
onto a field with many relatively faint reference stars our main focus was onto
extragalactic targets that are plagued by the problem of limited sky coverage. While
we achieved demonstrative science onto a very crowded field using a globular cluster,
allowing to assess firmly the compensation stability over the FoV, we succeeded into
securing scientific data for a number ofextragalctic sources from the local Universe up
to Z = 3. In particular we devised stellar population study in a dwarf galaxy, morphology
of the jets in nearby AGN and the properties of the environment for high redshift quasars.
The scientific outcome of the observation run, consisting into 6 published refereed
papers and two forthcoming, is briefly reported along with some lessons learned.
Frauengrab von Castelbolognese in der Romagna (Italien)
Creators: name: Bierbrauer, Volker
Publisher: name: Jahrbuch des Römisch-Germanischen Zentralmuseums Mainz
Year: 2021

description: Jahrbuch des Römisch-Germanischen Zentralmuseums Mainz, Bd. 38 Nr. 2 (1991)
The quark anti-quark potential and the cusp anomalous dimension from a TBA equation
Creators: name: Correa, Diego
name: Maldacena, Juan
name: Sever, Amit
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We derive a set of integral equations of the TBA type for the generalized cusp anomalous dimension, or the quark antiquark potential on the three sphere, as a function of the angles. We do this by considering a family of local operators on a Wilson loop with charge L. In the large L limit the problem can be solved in terms of a certain boundary reflection matrix. We determine this reflection matrix by using the symmetries and the boundary crossing equation. The cusp is introduced through a relative rotation between the two boundaries. Then the TBA trick of exchanging space and time leads to an exact equation for all values of L. The L=0 case corresponds to the cusped Wilson loop with no operators inserted. We then derive a slightly simplified integral equation which describes the small angle limit. We solve this equation up to three loops in perturbation theory and match the results that were obtained with more direct approaches.
description: 63 pages, 12 figures. v2: references added, typos corrected
Violent subjectivity : new extremist cinema and the philosophy of Jean-Luc Nancy
Creators: name: Birks, Chelsea
Publisher: name: University of British Columbia
Year: 2013

description: Non-simulated penetrative sex, graphic sexual violence, gore, cannibalism, murder, incest, and necrophilia: excessive violence and explicit sexuality characterize European new extremism, a contemporary arthouse film movement that challenges audiences through its visceral interrogations of the body. Affect and embodiment are at the heart of the discourse concerning new extremism. Although approaching the movement from different frameworks, scholars agree that these films are transgressive in terms of style as well as content: they foreground the ways that cinema is able to impact the body, rather than the mind, of the spectator, and in doing so challenge traditional notions of spectatorship. This thesis examines new extremism in light of the work of contemporary French philosopher Jean-Luc Nancy, whose ontology of the subject provides a fresh perspective on the confrontational and occasionally traumatic cinematic experiences offered by these films. Nancy is a philosopher of limits: he argues that metaphysics has reached an impasse, and the way forward is to figure these limits in order to gesture towards what is beyond our ability to signify. He characterizes this excess in corporeal terms, arguing that there is always an excess in our material experiences that cannot be constrained to a system of thought. Using films such as Claire Denis’s Trouble Every Day (2001), Gaspar Noé’s Enter the Void (2009), Philippe Grandrieux’s Sombre (1998), and Marina de Van’s In My Skin (2002), I explore the ways that new extremism illustrates and exemplifies Nancy’s argument that the body is in excess of our understanding. The subject for Nancy constitutes itself, and in so doing divides itself from its body: this results in paradoxes and contradictions that are inexorable to our metaphysical thinking. But these paradoxes are suspended over the groundless non-essence of reality, a reality that we make images of through art and language. Nancy argues that art and existence are predicated on violence and cruelty, forces that he characterizes ambivalently as giving rise to the possibility of both abhorrent brutality and radical creation. New extremism touches on this ambivalence, using its central interrogation of the body to expose what is at the limit of our understanding.
Partition-function zeros of spherical spin glasses and their relevance to chaos
Creators: name: Obuchi, Tomoyuki
name: Takahashi, Kazutaka
Publisher: name: arXiv
Year: 2011
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We investigate partition-function zeros of the many-body interacting spherical spin glass, the so-called $p$-spin spherical model, with respect to the complex temperature in the thermodynamic limit. We use the replica method and extend the procedure of the replica symmetry breaking ansatz to be applicable in the complex-parameter case. We derive the phase diagrams in the complex-temperature plane and calculate the density of zeros in each phase. Near the imaginary axis away from the origin, there is a replica symmetric phase having a large density. On the other hand, we observe no density in the spin-glass phases, irrespective of the replica symmetry breaking. We speculate that this suggests the absence of the temperature chaos. To confirm this, we investigate the multiple many-body interacting case which is known to exhibit the chaos effect. The result shows that the density of zeros actually takes finite values in the spin-glass phase, even on the real axis. These observations indicate that the density of zeros is more closely connected to the chaos effect than the replica symmetry breaking.
description: 22 pages, 8 figures
title: Конструирование по технике оригами как средство продуктивной деятельности дошкольников
Creators: name: Григорьева, Е. В.
Publisher: name: Новгородский государственный университет имени Ярослава Мудрого (НовГУ)
Year: 2021

description: В статье описывается роль техники оригами в продуктивной деятельности детей дошкольного возраста, актуальность использования конструирования из бумаги в развитии мелкой моторики, при подготовке руки ребенка к письму; рассматриваются базовые формы оригами, приемы искусства складывания бумаги, доступные для дошкольников. Особое значение имеют рекомендации педагогам по обучению технике оригами современных детей, условия их сопровождения.
Langensée, Carl
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1838

description: Ort: Neapel
description: Verzeichnung=Description=Inventaire 05.07.2020 Automatisiert nach HAN-Import
description: Verzeichnung=Description=Inventaire ISAD(G) / HAN Katalogisierungsregeln für Archivbestände Detailliert
Network-Growth Rule Dependence of Fractal Dimension of Percolation Cluster on Square Lattice
Creators: name: Tanaka, Shu
name: Tamura, Ryo
Publisher: name: arXiv
Year: 2011
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: To investigate the network-growth rule dependence of certain geometric aspects of percolation clusters, we propose a generalized network-growth rule introducing a generalized parameter $q$ and we study the time evolution of the network. The rule we propose includes a rule in which elements are randomly connected step by step and the rule recently proposed by Achlioptas {\it et al.} [Science {\bf 323} (2009) 1453]. We consider the $q$-dependence of the dynamics of the number of elements in the largest cluster. As $q$ increases, the percolation step is delayed. Moreover, we also study the $q$-dependence of the roughness and the fractal dimension of the percolation cluster.
description: 4 pages, 5 figures, accepted for publication in Journal of the Physical Society of Japan
Supplementary Material from Estimating the drivers of urban economic complexity and their connection to economic performance
Creators: name: Gomez-Lievano, Andres
name: Patterson-Lomba, Oscar
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: 60302 Biogeography and Phylogeography
subject: FOS: Biological sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: 80201 Analysis of Algorithms and Complexity
subject: FOS: Computer and information sciences

description: Mathematical derivations, data sources, supplementary tables and figures.
Faster Geometric Algorithms via Dynamic Determinant Computation
Creators: name: Fisikopoulos, Vissarion
name: Peñaranda, Luis
Publisher: name: arXiv
Year: 2012
Subjects: subject: Computational Geometry (cs.CG)
subject: FOS: Computer and information sciences

description: The computation of determinants or their signs is the core procedure in many important geometric algorithms, such as convex hull, volume and point location. As the dimension of the computation space grows, a higher percentage of the total computation time is consumed by these computations. In this paper we study the sequences of determinants that appear in geometric algorithms. The computation of a single determinant is accelerated by using the information from the previous computations in that sequence. We propose two dynamic determinant algorithms with quadratic arithmetic complexity when employed in convex hull and volume computations, and with linear arithmetic complexity when used in point location problems. We implement the proposed algorithms and perform an extensive experimental analysis. On one hand, our analysis serves as a performance study of state-of-the-art determinant algorithms and implementations. On the other hand, we demonstrate the supremacy of our methods over state-of-the-art implementations of determinant and geometric algorithms. Our experimental results include a 20 and 78 times speed-up in volume and point location computations in dimension 6 and 11 respectively.
description: 29 pages, 8 figures, 3 tables
Minkowski length of 3D lattice polytopes
Creators: name: Beckwith, Olivia
name: Grimm, Matthew
name: Soprunova, Jenya
name: Weaver, Bradley
Publisher: name: arXiv
Year: 2012
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 52B20, 94B27, 14G50

description: We study the Minkowski length L(P) of a lattice polytope P, which is defined to be the largest number of non-trivial primitive segments whose Minkowski sum lies in P. The Minkowski length represents the largest possible number of factors in a factorization of polynomials with exponent vectors in P, and shows up in lower bounds for the minimum distance of toric codes. In this paper we give a polytime algorithm for computing L(P) where P is a 3D lattice polytope. We next study 3D lattice polytopes of Minkowski length 1. In particular, we show that if Q, a subpolytope of P, is the Minkowski sum of L = L(P) lattice polytopes Qi, each of Minkowski length 1, then the total number of interior lattice points of the polytopes Q1,..., QL is at most 4. Both results extend previously known results for lattice polygons. Our methods differ substantially from those used in the two-dimensional case.
description: 20 pages, 17 figures, to appear in Discrete and Computational Geometry
In vivo effect of Berberis lyceum and Silybum marianum on production performance and immune status in broiler chicks
Creators: name: Mushtaq, Muhammad
name: Naz, Shabana
name: Khan, Sarzamin
name: Ur-Rehman, Sajid
name: Khan, Rifat Ullah
Publisher: name: Leibniz Institute for Farm Animal Biology (FBN), Dummerstorf, Germany
Year: 2013
Subjects: subject: 570 Life sciences

description: Archiv Tierzucht 56 (2013) 91, 911-916; ISSN 0003-9438
New Phase Induced by Pressure in the Iron-Arsenide Superconductor K-Ba122
Creators: name: Hassinger, E.
name: Gredat, G.
name: Valade, F.
name: de Cotret, S. Rene
name: Juneau-Fecteau, A.
name: Reid, J. -Ph.
name: Kim, H.
name: Tanatar, M. A.
name: Prozorov, R.
name: Shen, B.
name: Wen, H. -H.
name: Doiron-Leyraud, N.
name: Taillefer, Louis
Publisher: name: arXiv
Year: 2012
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The electrical resistivity rho of the iron-arsenide superconductor Ba1-xKxFe2As2 was measured in applied pressures up to 2.6 GPa for four underdoped samples, with x = 0.16, 0.18, 0.19 and 0.21. The antiferromagnetic ordering temperature T_N, detected as a sharp anomaly in rho(T), decreases linearly with pressure. At pressures above around 1.0 GPa, a second sharp anomaly is detected at a lower temperature T_0, which rises with pressure. We attribute this second anomaly to the onset of a phase that causes a reconstruction of the Fermi surface. This new phase expands with increasing x and it competes with superconductivity. We discuss the possibility that a second spin-density wave orders at T_0, with a Q vector distinct from that of the spin-density wave that sets in at T_N.
description: Two higher K concentrations were added, revealing a steady expansion of the new phase in the T-P phase diagram
Discrimination between Lambda-CDM, quintessence, and modified gravity models using wide area surveys
Creators: name: Ziaeepour, Houri
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In the past decade or so observations of supernovae, Large Scale Structures (LSS), and the Cosmic Microwave Background (CMB) have confirmed the presence of what is called dark energy - the cause of accelerating expansion of the Universe. They have also measured its density as well as the value of other cosmological parameters according to the concordance $Λ$CDM model with few percent uncertainties. Next generation of surveys should allow to constrain this model with better precisions, or distinguish between a LCDM and alternative models such as modified gravity and (interacting)-quintessence models. In this work we parametrize both homogeneous and anisotropic components of matter density in the context of interacting dark energy models with the goal of discriminating between f(R) modified gravity and its generalizations, and interacting dark energy models, for which we also propose a phenomenological description of energy-momentum conservation equations inspired by particle physics. It is based on the fact that the simplest interactions between particles/fields are elastic scattering and decay. The parametrization of growth rate proposed here is nonetheless general and can be used to constrain other interactions. As an example of applications, we present an order of magnitude estimation of the accuracy of the measurement of these parameters using Euclid and Planck surveys data, and leave a better estimation to a dedicated work.
description: 34 pages, 1 figure. v3: version accepted for publication in PRD
Kaiser & Heimbürger
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1838

description: Ort: Moskau
description: Verzeichnung=Description=Inventaire 05.07.2020 Automatisiert nach HAN-Import
description: Verzeichnung=Description=Inventaire ISAD(G) / HAN Katalogisierungsregeln für Archivbestände Detailliert
The anti-diagonal filtration: reduced theory and applications
Creators: name: Tweedy, Eamonn
Publisher: name: arXiv
Year: 2011
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: Given a knot K in S^3, Seidel and Smith described in arXiv:1002.2648v3 a graded cohomology group Kh_{symp,inv}(K), a variant of their symplectic Khovanov cohomology group. They also constructed a spectral sequence converging to the Heegaard Floer-hat homology group for the connected sum of the double branched cover and a copy of S^{2}xS^{1} (with E^1-page isomorphic to a direct summand of Kh_{symp,inv}(K)). In a previous paper (arXiv:1004.2476v5), we showed that the higher pages of this spectral sequence are knot invariants. Here we discuss a reduced version of the spectral sequence which directly computes HF-hat of the double branched cover. Under some degeneration conditions, one obtains a new absolute Maslov grading on that group. This occurs when K is a two-bridge knot, and we compute the grading in this case. We also extract some rational-valued knot invariants from this construction.
description: 46 pages, 43 figures. Sequel to arXiv:1004.2476v5. Theorem numbering conventions changed. Theorem 1.0.3 (formerly Theorem 2) now only appears with field coefficients. Exposition in Sections 2 and 3 expanded. Changes made to the proof of Lemma 3.9.2, formerly Lemma 19. Section 3.10 added. This is the version to appear in Int. Math Res. Notices, published online Oct. 2014
Prototype Small Footprint Amplifier for Piezoelectric Deformable Mirrors
Creators: name: Caputa, Kris
name: Herriot, Glen
name: Niebergal, Joel
name: Zielinski, Adam
Publisher: name: Proceedings of the AO4ELT2 conference (Publisher: ONERA; Editors: J.-P. Véran, Y. Clénet, T. Fusco)
Year: 2011
Subjects: ADAPTIVE OPTICS
EXTREMELY LARGE TELESCOPES
PATHFINDERS
INSTRUMENTS
WAVEFRONT CORRECTORS
WAVEFRONT SENSING
LASER GUIDE STAR SYSTEMS
ATMOSPHERIC TURBULENCE
REAL-TIME CONTROL
MODELING
POST-PROCESSING

description: Adaptive Optics (AO) systems of the Extremely Large Telescopes (ELT) will incorporate
deformable mirrors with an order of magnitude larger number of piezoelectric actuators than the AO
systems currently deployed. Simply scaling up the drive electronics offered commercially would
substantially drive up the AO cost, pose unacceptably high demands for the supply power, and occupy
large volume. We are progressing on the design of a compact high voltage amplifier with the goal to have
a Deformable Mirror (DM) drive density of 1200 channels per 6U VME crate. Amplifiers will be driven
by multichannel D/A converters, consume no more than 0.5 W power each, be slew rate limited in
hardware, and be short-circuit protected. In addition, the cost per amplifier is expected to be drastically
lower compared to the integrated circuit amplifier currently used in smaller scale AO systems. Several
suitable circuits using inexpensive components have been conceived and investigated by computer
simulation and built. In this paper we present experimental results of prototype circuits exposed to both
normal operating conditions and foreseeable fault conditions. The performance is evaluated against the
AO requirements for the output range and bandwidth as well as the DM actuator operational safety
requirements.
Lenel, Gebrüder
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1838

description: Ort: Mannheim
description: Verzeichnung=Description=Inventaire 05.07.2020 Automatisiert nach HAN-Import
description: Verzeichnung=Description=Inventaire ISAD(G) / HAN Katalogisierungsregeln für Archivbestände Detailliert
Operator product expansion in QCD in off-forward kinematics: Separation of kinematic and dynamical contributions
Creators: name: Braun, V. M.
name: Manashov, A. N.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We develop a general approach to the calculation of target mass and finite t=(p'-p)^2 corrections in hard processes which can be studied in the framework of the operator product expansion and involve momentum transfer from the initial to the final hadron state. Such corrections, which are usually referred to as kinematic, can be defined as contributions of operators of all twists that can be reduced to total derivatives of the leading twist operators. As the principal result, we provide a set of projection operators that pick up the "kinematic" part of an arbitrary flavor-nonsinglet twist-four operator in QCD. A complete expression is derived for the time-ordered product of two electromagnetic currents that includes all kinematic corrections to twist-four accuracy. The results are immediately applicable to the studies of deeply-virtual Compton scattering, transition gamma^*-> M gamma form factors and related processes. As a byproduct of this study, we find a series of "genuine" twist-four flavor-nonsinglet quark-antiquark-gluon operators which have the same anomalous dimensions as the leading twist quark-antiquark operators.
description: 68 pages, 2 figures. Misprints in Eq.(5.64) and several equations in Sec.6 are corrected. For readers' convenience all corrections are marked in red
A pyramid sensor based AO system for Extremely Large Telescopes
Creators: name: Quiros-Pacheco, F.
name: Pinna, E.
name: Esposito, S.
name: Arcidiacono, C.
name: Agapito, G.
name: Rabien, S.
Publisher: name: Proceedings of the AO4ELT2 conference (Publisher: ONERA; Editors: J.-P. Véran, Y. Clénet, T. Fusco)
Year: 2011
Subjects: ADAPTIVE OPTICS
EXTREMELY LARGE TELESCOPES
PATHFINDERS
INSTRUMENTS
WAVEFRONT CORRECTORS
WAVEFRONT SENSING
LASER GUIDE STAR SYSTEMS
ATMOSPHERIC TURBULENCE
REAL-TIME CONTROL
MODELING
POST-PROCESSING

description: Since the introduction of the pyramid wavefront sensor in the mid 90s, various authors have
shown both theoretically and with the aid of simulations that pyramid sensors can achieve a better
performance than traditional Shack-Hartmann wavefront sensors. Recently the First-Light Adaptive
Optics system (FLAO) at the Large Binocular Telescope demonstrated excellent on sky performance
achieved with a pyramid based system. Motivated by these results, we will present in this paper a first
heuristic analysis scaling up the FLAO performance to the case of an Extremely Large Telescope (ELT).
We support our arguments with preliminary numerical simulations for the case of the European ELT using
the M4 adaptive corrector design and a properly matched pyramid sensor. Such a system could be used as
a first-light natural guide-star AO system for the European ELT offering the advantages of a demonstrated
AO system with practically off-the-shelf technology.
Contactless Large Deformable Mirrors: ELT AO Corrector Technology Available Now
Creators: name: Biasi, Roberto
name: Gallieni, Daniele
Publisher: name: Proceedings of the AO4ELT2 conference (Publisher: ONERA; Editors: J.-P. Véran, Y. Clénet, T. Fusco)
Year: 2011
Subjects: ADAPTIVE OPTICS
EXTREMELY LARGE TELESCOPES
PATHFINDERS
INSTRUMENTS
WAVEFRONT CORRECTORS
WAVEFRONT SENSING
LASER GUIDE STAR SYSTEMS
ATMOSPHERIC TURBULENCE
REAL-TIME CONTROL
MODELING
POST-PROCESSING

description: We present our design of ESO E-ELT M4 deformable mirror and GMT Adaptive Secondary Mirrors unit. Both systems are based on our consolidated design of large deformable mirrors for 8-m class telescopes, successfully implemented on MMT and LBT and currently in advanced construction and testing phase for VLT and Magellan telescopes respectively. We describe the main features of the technology adopted: thin Zerodur mirror shell with contactless voice coil motors, co-located capacitive sensors to close a local position loop at each actuator, centralized control by force feedforward, embedded real time control and communication electronics. We then highlight how the same concept has been scaled up on the E-ELT M4AU and the GMT-ASM cases, adapting the technology to deal with thousands of actuators, while maintaining its intrinsic advantages: tolerance to actuators' failures, mechanical de-coupling and relaxed tolerances between correcting mirror and reference structure, large stroke, hysteresis-free behavior. For the next generation systems, we report the predicted performances based on the actual results attained on our 1-m class DMs currently in use: the LBT adaptive secondary for the GMT-ASM and the 330 actuators Demonstration Prototype for the E-ELT M4AU.
Küstner, Heinrich, & Co
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1838

description: Ort: Leipzig
description: Verzeichnung=Description=Inventaire 05.07.2020 Automatisiert nach HAN-Import
description: Verzeichnung=Description=Inventaire ISAD(G) / HAN Katalogisierungsregeln für Archivbestände Detailliert
Remote sensing and Unmanned Aerial System (UAS) application for geological exploration
Creators: name: Filipov, Anton
name: Bogdanov, Kamen
name: Ognyanov, Ognyan
Publisher: name: Zenodo
Year: 2021
Subjects: GoldenEye
Remote sensing
Mineral exploration

description: As a result of the initial remote sensing survey potentially target areas for future mineral detection and exploration were identified on satellite multispectral images. The challenge is to perform detailed high resolution mapping in RGB and NIR channels to obtain more clear picture of exploration targets location and evaluation Next level of development is to find the way to map from drone in SWIR even with minimal number of channels This will significantly enhance picture and give us more trustworthy results. As a conclusion we could note that even limited number of remote sensing data could be very useful.
 for the ex ploration geologist s for documenting and discovery of mineral deposits
American pika population genetic structure, demographic history, and behavior in an atypical environment
Creators: name: Robson, Kelsey
Publisher: name: University of British Columbia
Year: 2013

description: Anthropogenic impacts on biodiversity are large and varied, from habitat destruction and fragmentation to climate change. In response to these threats, wildlife species must rapidly adapt within their geographic range, or disperse to different areas that have become environmentally suitable. If not, population decline, extirpation, and eventual species extinction will result. There is a current need for research into the ability of organisms to persist at the tolerance limits of their bioclimatic envelope, as this information will help assess potential responses to changing environments. The American pika (Ochotona princeps) is an appropriate model species for studies of adaptability and persistence in atypical environments. The geographic range of these climate-sensitive mammals extends across a large, variable landscape. Pikas typically inhabit alpine talus that is patchily distributed; as such, they are also a model species for studies of metapopulation dynamics in a fragmented landscape. This study used microsatellite genotypic data to investigate a) population genetic variation and demographic history, b) relatedness and inbreeding, and c) population structure and connectivity of American pika inhabiting an atypical environment in the Columbia River Gorge, Oregon. A total of 316 hair samples were non-invasively collected from 11 sites across an elevation gradient ranging from 46-1260 m. There were 155 pikas identified in the sample. For this system, high inbreeding and low genetic variation best characterized pikas within a site. A high degree of structure was detected among sites, and differentiation increased where topographical features potentially served as dispersal barriers. Although pikas inhabiting geographically proximate sites tended to cluster at similar elevations, there was little evidence of statistically significant migration. Indirect measures, however, such as within-site relatedness and inbreeding, strongly suggested a pattern of male-biased dispersal. This work addressed a knowledge gap in the pika literature by reporting on the population genetics and behavior of populations inhabiting an atypical environment. In order to properly evaluate the conservation status of the American pika, and inform sound management policies, it is necessary to consider the entire species distribution and compare populations from different parts of the range.
Robustness of correlated networks against propagating attacks
Creators: name: Hasegawa, Takehisa
name: Konno, Keita
name: Nemoto, Koji
Publisher: name: arXiv
Year: 2012
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Social and Information Networks (cs.SI)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We investigate robustness of correlated networks against propagating attacks modeled by a susceptible-infected-removed model. By Monte-Carlo simulations, we numerically determine the first critical infection rate, above which a global outbreak of disease occurs, and the second critical infection rate, above which disease disintegrates the network. Our result shows that correlated networks are robust compared to the uncorrelated ones, regardless of whether they are assortative or disassortative, when a fraction of infected nodes in an initial state is not too large. For large initial fraction, disassortative network becomes fragile while assortative network holds robustness. This behavior is related to the layered network structure inevitably generated by a rewiring procedure we adopt to realize correlated networks.
description: 6 pages, 13 figures
Astrometry and photometry in high contrast imaging: ADI/LOCI biases and the SOSIE/LOCI solution
Creators: name: Galicher, Raphael
name: Marois, Christian
Publisher: name: Proceedings of the AO4ELT2 conference (Publisher: ONERA; Editors: J.-P. Véran, Y. Clénet, T. Fusco)
Year: 2011
Subjects: ADAPTIVE OPTICS
EXTREMELY LARGE TELESCOPES
PATHFINDERS
INSTRUMENTS
WAVEFRONT CORRECTORS
WAVEFRONT SENSING
LASER GUIDE STAR SYSTEMS
ATMOSPHERIC TURBULENCE
REAL-TIME CONTROL
MODELING
POST-PROCESSING

description: The direct exoplanet imaging field will strongly benefit from the higher angular resolution achieved
by next generation 30+m telescopes. To fully take advantage of these new facilities, one of the biggest challenges
that ground-based adaptive optics imaging must overcome is to derive accurate astrometry and photometry of
point sources. The planet photometry and its astrometry are used to compare with atmospheric models and to
fit orbits. If erroneous numbers are found, or if errors are underestimated, spurious fits can lead to unphysical
planet characteristics or wrong/unstable orbits. Overestimating the errors also needs to be avoided as it degrades
the value of the data. Several photometry/astrometry biases that are induced by advance imaging and processing
techniques (such as ADI/SSDI/LOCI) are presented as well as a procedure to properly overcome those effects.
These solutions will be implemented in the Gemini Planet Imager campaign data pipeline and it is expected that
they will also play a crucial role in any future direct exoplanet imaging survey.
Scaling of Dynamical Decoupling for Spin Qubits
Creators: name: Medford, J.
name: Cywinski, L.
name: Barthel, C.
name: Marcus, C. M.
name: Hanson, M. P.
name: Gossard, A. C.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate scaling of coherence time, T2, with the number of π-pulses, n_π, in a singlet- triplet spin qubit using Carr-Purcell-Meiboom-Gill (CPMG) and concatenated dynamical decoupling (CDD) pulse sequences. For an even numbers of CPMG pulses, we find a power law, T2 = (n_π)^(γ_e), with γ_e = 0.72\pm0.01, essentially independent of the envelope function used to extract T2. From this surprisingly robust value, a power-law model of the noise spectrum of the environment, S(ω) ~ ω^(-β), yields β = γ_e/(1 - γ_e) = 2.6 \pm 0.1. Model values for T2(n_π) using β = 2.6 for CPMG with both even and odd n_π up to 32 and CDD orders 3 through 6 compare very well with experiment.
description: related articles at http://marcuslab.harvard.edu
Hortsmann & Co
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1838

description: Ort: Lübeck
description: Verzeichnung=Description=Inventaire 05.07.2020 Automatisiert nach HAN-Import
description: Verzeichnung=Description=Inventaire ISAD(G) / HAN Katalogisierungsregeln für Archivbestände Detailliert
Pairing instabilities in quasi-two-dimensional Fermi gases
Creators: name: Pietilä, Ville
name: Pekker, David
name: Nishida, Yusuke
name: Demler, Eugene
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We study non-equilibrium dynamics of ultracold two-component Fermi gases in low-dimensional geometries after the interactions are quenched from weakly interacting to strongly interacting regime. We develop a T-matrix formalism that takes into account the interplay between Pauli blocking and tight confinement in low-dimensional geometries. We employ our formalism to study the formation of molecules in quasi-two-dimensional Fermi gases near Feshbach resonance and show that the rate at which molecules form depends strongly on the transverse confinement. Furthermore, Pauli blocking gives rise to a sizable correction to the binding energy of molecules.
description: 6 pages, 3 figures
ASSESSMENT OF RELAPSE OF VISCERAL LEISHMANIASIS AND RISK FACTORS AMONG VISERAL LEISHMANIASIS PATIENTS IN WEST ARMACHIHO, NORTHWEST ETHIOPIA. INSTITUTION BASED RETROSPECTIVE STUDY
Creators: name: MEKONNEN AYELE ( BSC In Clinical Nursing), ZELALEM
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2014

description: No abstract available for this resource
Three-loop β-functions for top-Yukawa and the Higgs self-interaction in the Standard Model
Creators: name: Chetyrkin, K. G.
name: Zoller, M. F.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We analytically compute the dominant contributions to the β-functions for the top-Yukawa coupling, the strong coupling and the Higgs self-coupling as well as the anomalous dimensions of the scalar, gluon and quark fields in the unbroken phase of the Standard Model at three-loop level. These are mainly the QCD and top-Yukawa corrections. The contributions from the Higgs self-interaction which are negligible for the running of the top-Yukawa and the strong coupling but important for the running of the Higgs self-coupling are also evaluated.
description: 22 pages, 7 figures. Few extra citations are added; the plots are improved. Results in computer readable form can be retrieved from http://www-ttp.particle.uni-karlsruhe.de/Progdata/ttp12/ttp12-012/
Evanescent field interactions in the scattering from cylinders with applications in super-resolution
Creators: name: Pawliuk, Peter Cornelius
Publisher: name: University of British Columbia
Year: 2013

description: The diffraction limit defines the maximum resolution of an imaging system that collects and focuses waves. This limited resolution arises from the finite length of the waves used to create the image. Therefore, the only way to increase the resolution is to use higher frequencies with shorter wavelengths. For situations in which increasing the frequency is not possible or not desirable, super-resolution imaging techniques can be applied to overcome the diffraction limit. Super-resolution is possible with the inclusion of evanescent waves, which exhibit unlimited spatial frequencies. Evanescent waves decay exponentially away from their surface of origin so they are difficult to recover. One way to recover evanescent wave information is to scatter the wave from a small object. This scattering converts part of the evanescent wave into radiation that can propagate into the far-field where it can be detected. In order to characterize this conversion, the two-dimensional scattering of evanescent fields from a single cylinder and from multiple cylinders is investigated. The scattering models are derived using an analytical approach where the electromagnetic fields are broken down into cylindrical waves so that the boundary conditions on the cylinders can be applied directly. The incident field can be formulated from a vector plane-wave spectrum, which allows for an arbitrary combination of radiative and evanescent waves. Multiple cylinders of various sizes can be used to approximate the scattering from many two-dimensional objects. For simulating the imaging of objects buried underneath a surface, or near a planar interface, the model is separated into two dielectric half-spaces. An example of a super-resolution application for these models is the simulation of apertureless near-field scanning optical microscopy (ANSOM). In ANSOM, a probe is placed in the extreme near-field of an object in order to scatter the evanescent fields that are formed by the illumination of the object. Images created by ANSOM are fundamentally different from traditional images and are difficult to interpret. The simulations provide insight into how the images are formed and what information they contain.
Dynamic Model of Markets of Homogenous Non-Durable
Creators: name: Kaldasch, Joachim
Publisher: name: arXiv
Year: 2011
Subjects: subject: Applications (stat.AP)
subject: General Finance (q-fin.GN)
subject: FOS: Computer and information sciences
subject: FOS: Economics and business

description: A new microeconomic model is presented that aims at a description of the long-term unit sales and price evolution of homogeneous non-durable goods in polypoly markets. It merges the product lifecycle approach with the price dispersion dynamics of homogeneous goods. The model predicts a minimum critical lifetime of non-durables in order to survive. Under the condition that the supply side of the market evolves much faster than the demand side the theory suggests that unsatisfied demands are present in the first stages of the lifecycle. With the growth of production capacities these demands disappear accompanied with a logistic decrease of the mean price of the good. The model is applied to electricity as a non-durable satisfying the model condition. The presented theory allows a deeper understanding of the sales and price dynamics of non-durables.
Koechlin, Nicolas, & Frères
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1838

description: Ort: Mulhouse
description: Verzeichnung=Description=Inventaire 05.07.2020 Automatisiert nach HAN-Import
description: Verzeichnung=Description=Inventaire ISAD(G) / HAN Katalogisierungsregeln für Archivbestände Detailliert