cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Almost all decision trees do not allow significant quantum speed-up
Creators: name: Montanaro, Ashley
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We show that, for any d, all but a doubly exponentially small fraction of decision trees of depth at most d require Omega(d) quantum queries to be computed with bounded error. In other words, most efficient classical algorithms in the query complexity model do not admit a significant quantum speed-up. The proof is based on showing that, with high probability, the average sensitivity of a random decision tree is high.
description: 6 pages
Spin dynamics in a two-dimensional quantum gas
Creators: name: Pedersen, Poul L.
name: Gajdacz, Miroslav
name: Deuretzbacher, Frank
name: Santos, Luis
name: Klempt, Carsten
name: Sherson, Jacob F.
name: Hilliard, Andrew J.
name: Arlt, Jan J.
Publisher: name: College Park : American Physical Society
Year: 2014
Subjects: subject: Applied magnetic fields
subject: Ballistic expansion
subject: Bose-Einstein condensates
subject: Density distributions
subject: Density modulation
subject: Einstein-podolsky-rosen entanglements
subject: Momentum correlation
subject: Spin orientations
subject: Einstein
subject: limit
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We have investigated spin dynamics in a two-dimensional quantum gas. Through spin-changing collisions, two clouds with opposite spin orientations are spontaneously created in a Bose-Einstein condensate. After ballistic expansion, both clouds acquire ring-shaped density distributions with superimposed angular density modulations. The density distributions depend on the applied magnetic field and are well explained by a simple Bogoliubov model. We show that the two clouds are anticorrelated in momentum space. The observed momentum correlations pave the way towards the creation of an atom source with nonlocal Einstein-Podolsky-Rosen entanglement.
Magic numbers in the discrete tomography of cyclotomic model sets
Creators: name: Huck, Christian
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: Metric Geometry (math.MG)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 52C23 (Primary) 11R04, 11R18, 52A10, 82D99 (Secondary)

description: We report recent progress in the problem of distinguishing convex subsets of cyclotomic model sets $\varLambda$ by (discrete parallel) X-rays in prescribed $\varLambda$-directions. It turns out that for any of these model sets $\varLambda$ there exists a `magic number' $m_{\varLambda}$ such that any two convex subsets of $\varLambda$ can be distinguished by their X-rays in any set of $m_{\varLambda}$ prescribed $\varLambda$-directions. In particular, for pentagonal, octagonal, decagonal and dodecagonal model sets, the least possible numbers are in that very order 11, 9, 11 and 13.
description: 6 pages, 1 figure; based on the results of arXiv:1101.4149 [math.MG]; presented at Aperiodic 2012 (Cairns, Australia)
Diffractive W production at hadron colliders as a test of colour singlet exchange mechanisms
Creators: name: Ingelman, Gunnar
name: Pasechnik, Roman
name: Rathsman, Johan
name: Werder, Dominik
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We revisit diffractive and exclusive W production at hadron colliders in different models for soft colour exchanges. The process pp to p[WX]p, and in particular a W charge asymmetry, has been suggested as a way to discriminate diffractive processes as being due to pomeron exchange in Regge phenomenology or QCD-based colour reconnection models. Our detailed analysis of the latter models at LHC energies shows, however, that they give similar results as pomeron models for very leading protons and central W production, including a vanishing W charge asymmetry. We demonstrate that soft colour exchange models provide a continuous transition from diffractive to inelastic processes and thereby include the intrinsic asymmetry of inelastic interactions while being at the same time sensitive to the underlying hadronisation models. Such sensitivity also concerns the differential distributions in proton momentum and W transverse momentum which opens possibilities to discriminate between different colour reconnection models.
description: 17 pages, 8 figures
Frequency feedback for two-photon interference from separate quantum dots
Creators: name: Zopf, Michael
name: Macha, Tobias
name: Keil, Robert
name: Urunuela, Eduardo
name: Chen, Yan
name: Alt, Wolfgang
name: Ratschbacher, Lothar
name: Ding, Fei
name: Meschede, Dieter
name: Schmidt, Oliver G.
Publisher: name: College Park : American Physical Society
Year: 2018
Subjects: subject: Faraday effect
subject: Network stability
subject: Piezoelectricity
subject: Quantum optics
subject: Quantum repeaters
subject: Single photon sources
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: We employ active feedback to stabilize the frequency of single photons emitted by two separate quantum dots to an atomic standard. The transmission of a rubidium-based Faraday filter serves as the error signal for frequency stabilization. We achieve a residual frequency deviation of <30 MHz, which is less than 1.5% of the quantum dot linewidth. Long-term stability is demonstrated by Hong-Ou-Mandel interference between photons from the two quantum dots. Their internal dephasing limits the expected visibility to V = 40%. We observe V_lock = (41 ± 5)% for frequency-stabilized dots as opposed to Vfree = (31 ± 7)% for free-running emission. Our technique reaches the maximally expected visibility for the given system and therefore facilitates quantum networks with indistinguishable photons from distributed sources. ©2018 American Physical Society
Spontaneous electromagnetic superconductivity of vacuum induced by a strong magnetic field: QCD and electroweak theory
Creators: name: Chernodub, M. N.
name: Van Doorsselaere, J.
name: Verschelde, H.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Both in electroweak theory and QCD, the vacuum in strong magnetic fields develops charged vector condensates once a critical value of the magnetic field is reached. Both ground states have a similar Abrikosov lattice structure and superconducting properties. It is the purpose of these proceedings to put the condensates and their superconducting properties side by side and obtain a global view on this type of condensates. Some peculiar aspects of the superfluidity and backreaction of the condensates are also discussed.
description: 7 pages, 4 figures. Talk presented at QCD@Work 2012: International Workshop on QCD - Theory and Experiment, June 18-21, Lecce, Italy
Effect of Ocular Magnification on Macular Choroidal Thickness Measurements Made Using Optical Coherence Tomography in Children
Creators: name: Deng, Junjie
name: Jin, Jiali
name: Zhang, Bo
name: Zhang, Siqi
name: Wang, Jingjing
name: Xiong, Shuyu
name: Cheng, Tianyu
name: Liu, Kun
name: Huang, Jiannan
name: He, Xiangui
name: Xu, Xun
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Physiology
subject: Biotechnology
subject: Marine Biology
subject: Cancer
subject: Science Policy
subject: Hematology
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Virology
subject: Computational Biology

description: To evaluate the relationship between ocular magnification correction and macular choroidal thickness (ChT) measurements in children, and to demonstrate when ocular magnification correction is necessary. Chinese children aged 6–9 years with various refractive statuses were included. Swept-source optical coherence tomography was used to measure macular ChT. A self-designed program was adopted to simulate ChT changes in each sector of the ETDRS grid in the macula under various simulated axial lengths (ALs). ChT measurements were not affected for all simulated ALs in over 95% of the individuals in the central fovea. In the inferior, superior, and temporal parafoveal sectors, the extent of AL that may include 95% of the individuals narrowed from approximately 22.0 mm to 27.2 mm. In the nasal parafoveal sector and inferior, superior, and temporal perifoveal sectors, the extent of AL that may include 95% of the individuals became even narrower, from approximately 22.8 mm to 26.0 mm. The narrowest extent was observed in the perifoveal nasal sector, ranging from 23.3 mm to 25.5 mm. The effect of ocular magnification was more significant in hyperopes than in myopes in the inferior parafoveal sector and temporal, superior, and nasal perifoveal sectors. During macular ChT measurements, ocular magnification correction is not necessary in the central fovea. However, ocular magnification should be corrected normally in the nasal perifoveal region and in individuals with ALs shorter than 22.8 mm or longer than 26.0 mm in the remaining macular regions.
Strongly enhanced thermal transport in a lightly doped Mott insulator at low temperature
Creators: name: Zlatić, V.
name: Freericks, J. K.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We show how a lightly doped Mott insulator has hugely enhanced electronic thermal transport at low temperature. It displays universal behavior independent of the interaction strength when the carriers can be treated as nondegenerate fermions and a nonuniversal "crossover" region where the Lorenz number grows to large values, while still maintaining a large thermoelectric figure-of-merit. The electron dynamics are described by the Falicov-Kimball model which is solved for arbitrary large on-site correlation with a dynamical mean-field theory algorithm on a Bethe lattice. We show how these results are generic for lightly doped Mott insulators as long as the renormalized Fermi liquid scale is pushed to very low temperature and the system is not magnetically ordered.
description: 4 pages, 5 figures
Effect of the three-nucleon force on the three-nucleon ground state: Reducible and irreducible contributions
Creators: name: Stadler, A.
name: Sauer, P.U.
Publisher: name: College Park, MD : American Physical Society
Year: 1992
Subjects: subject: Tucson-Melbourne two-pion
subject: triton binding energy
subject: three-nucleon force
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: The Tucson-Melbourne two-pion exchange three-nucleon force is split into a reducible part mediated by Δ excitation and an irreducible part not mediated by Δ excitation. The triton binding energy is calculated. The irreducible part of the Tucson-Melbourne force is taken into account in the calculation. Its reducible part is discarded, but regenerated by the explicit treatment of the Δ isobar in a coupled-channel approach. The remaining irreducible part of the Tucson-Melbourne force makes a nonnegligible contribution to the triton binding energy. The strong dependence of the triton binding energy on the cutoff parameter for the πNN vertex in the Tucson-Melbourne force is considerably reduced.
Inelastic electron scattering from the three-nucleon bound states with polarization
Creators: name: Schulze, R.-W.
name: Sauer, P.U.
Publisher: name: College Park, MD : American Physical Society
Year: 1993
Subjects: subject: electron scattering
subject: spectral function
subject: nuclear structure
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Spin-dependent inelastic electron scattering from polarized 3He is studied. The theoretical description uses the plane-wave impulse approximation. A spin-dependent spectral function, which summarizes all of the nuclear structure information on the process, is introduced. The formalism is developed for inclusive processes in all kinematic regimes of inelastic electron scattering. A comparison between theoretical predictions and experimental data is carried out in the region of quasifree scattering. The use of a polarized 3He target as a neutron spin target is discussed.
HD DVD substrates for surface enhanced Raman spectroscopy analysis: Fabrication, theoretical predictions and practical performance
Creators: name: Radu, A.I.
name: Ussembayev, Ye Ye
name: Jahn, M.
name: Schubert, U.S.
name: Weber, K.
name: Cialla-May, D.
name: Hoeppener, S.
name: Heisterkamp, A.
name: Popp, J.
Publisher: name: Cambridge : Royal Society of Chemistry
Year: 2016
Subjects: subject: HD DVD
subject: nanotechnology
subject: photonic technology
subject: physical chemistry
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: Commercial HD DVDs provide a characteristic structure of encoding pits which were utilized to fabricate cost efficiently large area SERS substrates for chemical analysis. The study targets the simulation of the plasmonic structure of the substrates and presents an easily accessible fabrication process to obtain highly sensitive SERS active substrates. The theoretical simulation predicted the formation of supermodes under optimized illumination conditions, which were verified experimentally. First tests of the developed SERS substrates demonstrated their excellent potential for detecting vitamin A and pro-vitamin A at low concentration levels.
On Sasaki-Ricci solitons and their deformations
Creators: name: Petrecca, David
Publisher: name: Berlin : De Gruyter
Year: 2016
Subjects: subject: deformations
subject: Sasaki-Ricci solitons
subject: Sasakian manifolds
subject: Dewey Decimal Classification::500 | Naturwissenschaften::510 | Mathematik

description: We extend to the Sasakian setting a result of Tian and Zhu about the decomposition of the Lie algebra of holomorphic vector fields on a Kähler manifold in the presence of a Kähler-Ricci soliton. Furthermore we apply known deformations of Sasakian structures to a Sasaki-Ricci soliton to obtain a stability result concerning generalized Sasaki-Ricci solitons, generalizing results of Li in the Kähler setting and of He and Sun by relaxing some of their assumptions. © 2016 by Walter de Gruyter.
Figure S1 - SEM sample preparation from From tissue retrieval to electron tomography: nanoscale characterization of the interface between bone and bioactive glass
Creators: name: Micheletti, Chiara
name: Gomes-Ferreira, Pedro Henrique Silva
name: Casagrande, Travis
name: Lisboa-Filho, Paulo Noronha
name: Okamoto, Roberta
name: Grandfield, Kathryn
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: 90301 Biomaterials
subject: FOS: Medical engineering
subject: 90399 Biomedical Engineering not elsewhere classified

description: Sequence representing the preparation steps for SEM analysis of the sample retrieved from the in vivo study. The section of bone tissue, titanium implant and BG particles was first embedded in resin. The embedded sample was then secured on a SEM stub by carbon tape and wrapped with aluminum tape, and finally coated with carbon.
A novel CO2-stable dual phase membrane with high oxygen permeability
Creators: name: Liang, Fangyi
name: Luo, Huixia
name: Partovi, Kaveh
name: Ravkina, Olga
name: Cao, Zhengwen
name: Liu, Yi
name: Caro, Jürgen
Publisher: name: Cambridge : Royal Society of Chemistry
Year: 2014
Subjects: subject: Hollow-Fiber Membrane
subject: Co2 Capture
subject: Separation
subject: Permeation
subject: Performance
subject: Composite
subject: Oxide
subject: Microstructure
subject: Stability
subject: Transport
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: By cobalt-doping of the mixed conducting phase PSFC, a good combination of high CO2 stability and high oxygen permeability is obtained for the 60 wt% Ce0.9Pr0.1O2-delta d -40 wt% Pr0.6Sr0.4Fe0.5Co0.5O3-delta (CP-PSFC) dual phase membrane, which suggests that CP-PSFC is a promising membrane for industrial applications in the oxyfuel process for CO2 capture.
Von der Lehr- zur Lernorientierung – auf dem Weg zu einer rechtswissenschaftlichen Fachdidaktik
Creators: name: Brockmann, Judith
name: Dietrich, Jan-Hendrik
name: Pilniok, Arne
Publisher: name: Berlin : Walter de Gruyter
Year: 2010
Subjects: subject: Rechtswissenschaft
subject: Jura
subject: Juristenausbildung
subject: Wissensvermittlung
subject: Didaktik
subject: Fachdidaktik
subject: Hochschuldidaktik
subject: Hochschule
subject: Universität
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie::340 | Recht
subject: Dewey Decimal Classification::300 | Sozialwissenschaften, Soziologie, Anthropologie::370 | Erziehung, Schul- und Bildungswesen

description: Die Verbesserung der Hochschullehre gerät an den juristischen Fakultäten in Deutschland zunehmend in den Blick. Der Beitrag widmet sich Grundsatzfragen der Wissensvermittlung und Wissensaneignung im rechtswissenschaftlichen Studium.
Advances in the Development of Mid-Infrared Integrated Devices for Interferometric Arrays
Creators: name: Labadie, L.
name: Martin, Guillermo
name: Rodenas, Airan
name: Anheier, Norman C.
name: Arezki, Brahim
name: Thomson, Robert R.
name: Qiao, Hong A.
name: Kern, Pierre
name: Kar, Ajoy K.
name: Bernacki, Bruce E.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: This article reports the advances on the development of mid-infrared integrated optics for stellar interferometry. The devices are fabricated by laser writing techniques on chalcogenide glasses. Laboratory characterizaton is reported and analyzed.
description: 12 pages, 9 figures, SPIE Astronomical Telescopes and Instrumentation
The vinylogous Mukaiyama aldol reaction (VMAR) in natural product synthesis
Creators: name: Kalesse, Markus
name: Cordes, Martin
name: Symkenberg, Gerrit
name: Lu, Hai-Hua
Publisher: name: Cambridge : Royal Society of Chemistry
Year: 2014
Subjects: subject: 1st Total-Synthesis
subject: Synthesis
subject: Alga Constantinea-Simplex
subject: Lewis-Base Activation
subject: Stereocontrolled Total-Synthesis
subject: Enantioselective Total-Synthesis
subject: Silyl Ketene Acetals
subject: Sponge Tedania-Ignis
subject: Addition-Reactions
subject: Marine Sponge
subject: Scytophycin-C
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie
subject: Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften, Biologie

description: The vinylogous Mukaiyama aldol reaction (VMAR) allows efficient access to larger segments for complex natural product synthesis, primarily polyketides, through the construction of vicinal hydroxyl and methyl groups as well as di and tri-substituted double bonds in one single operation. In this review, we will highlight stereoselective protocols that have been used in natural product synthesis and cluster them into the four groups that can be obtained from different silyl ketene acetals or enol ethers. At the beginning, an overview on different stereoselective VMARs is presented; disregarding their applications in total syntheses.
Lithium conductivity in glasses of the Li2O-Al2O3-SiO2 system
Creators: name: Ross, Sebastian
name: Welsch, Anna-Maria
name: Behrens, Harald
Publisher: name: Cambridge : Royal Society of Chemistry
Year: 2014
Subjects: subject: Sodium Aluminosilicate Glasses
subject: Molecular-Dynamics Simulation
subject: Ionic-Conductivity
subject: Silicate-Glasses
subject: Solid Electrolytes
subject: Oxide Glasses
subject: Electrical-Conductivity
subject: Supercooled Melts
subject: Tracer Diffusion
subject: Self-Diffusion
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: To improve the understanding of Li-dynamics in oxide glasses, i.e. the effect of [AlO4](-) tetrahedra and non-bridging oxygens on the potential landscape, electrical conductivity of seven fully polymerized and partly depolymerized lithium aluminosilicate glasses was investigated using impedance spectroscopy (IS). Lithium is the only mobile particle in these materials. Data derived from IS, i. e. activation energies, preexponential factors and diffusivities for lithium, are interpreted in light of Raman spectroscopic analyses of local structures in order to identify building units, which are crucial for lithium dynamics and migration. In polymerized glasses (compositional join LiAlSiO4-LiAlSi4O10) the direct current (DC) electrical conductivity continuously increases with increasing lithium content while lithium diffusivity is not affected by the Al/ Si ratio in the glasses. Hence, the increase in electrical conductivity can be solely assigned to lithium concentration in the glasses. An excess of Li with respect to Al, i.e. the introduction of non-bridging oxygen into the network, causes a decrease in lithium mobility in the glasses. Activation energies in polymerized glasses (66 to 70 kJ mol(-1)) are significantly lower than those in depolymerized networks (76 to 78 kJ mol(-1)) while pre-exponential factors are nearly constant across all compositions. Comparison of the data with results for lithium silicates from the literature indicates a minimum in lithium diffusivity for glasses containing both aluminium tetrahedra and non-bridging oxygens. The findings allow a prediction of DC conductivity for a large variety of lithium aluminosilicate glass compositions.
Data S1 from From tissue retrieval to electron tomography: nanoscale characterization of the interface between bone and bioactive glass
Creators: name: Micheletti, Chiara
name: Gomes-Ferreira, Pedro Henrique Silva
name: Casagrande, Travis
name: Lisboa-Filho, Paulo Noronha
name: Okamoto, Roberta
name: Grandfield, Kathryn
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: 90301 Biomaterials
subject: FOS: Medical engineering
subject: 90399 Biomedical Engineering not elsewhere classified

description: Raw images of the tilt series acquired from -60° to +74° (2° tilt increments).
Ring coproducts embedded in power-series rings
Creators: name: Ara, Pere
name: Dicks, Warren
Publisher: name: arXiv
Year: 2012
Subjects: subject: Rings and Algebras (math.RA)
subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 16S10, 20C07, 20E05

description: Let $R$ be a ring (associative, with 1), and let $R<< a,b>>$ denote the power-series $R$-ring in two non-commuting, $R$-centralizing variables, $a$ and $b$. Let $A$ be an $R$-subring of $R<< a>>$ and $B$ be an $R$-subring of $R<< b>>$, and let $α$ denote the natural map $A \amalg_R B \to R<< a,b>>$. This article describes some situations where $α$ is injective and some where it is not. We prove that if $A$ is a right Ore localization of $R[a]$ and $B$ is a right Ore localization of $R[b]$, then $α$ is injective. For example, the group ring over $R$ of the free group on $\{1+a, 1+b\}$ is $R[ (1+a)^{\pm 1}] \amalg_R R[ (1+b)^{\pm 1}]$, which then embeds in $R<< a,b>>$. We thus recover a celebrated result of R H Fox, via a proof simpler than those previously known. We show that $α$ is injective if $R$ is \textit{$Π$-semihereditary}, that is, every finitely generated, torsionless, right $R$-module is projective. The article concludes with some results contributed by G M Bergman that describe situations where $α$ is not injective. He shows that if $R$ is commutative and $\text{w.gl.dim\,} R \ge 2$, then there exist examples where the map $α' \colon A \amalg_R B \to R<< a>>\amalg_R R<< b>>$ is not injective, and hence neither is $α$. It follows from a result of K R Goodearl that when $R$ is a commutative, countable, non-self-injective, von Neumann regular ring, the map $α"\colon R<< a>>\amalg_R R<< b>> \to R<< a,b>>$ is not injective. Bergman gives procedures for constructing other examples where $α"$ is not injective.
description: 19 pages
Local Lorentz transformation and exact spherically symmetric vacuum solutions in f(T) gravity theories
Creators: name: Nashed, Gamal G. L.
Publisher: name: arXiv
Year: 2012
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: Applying a non-diagonal spherically symmetric tetrad field having arbitrary function, $S(r)$, that is corresponding to local Lorentz transformation, to the field equations of f(T) gravity theories. An analytic vacuum solutions with constants of integration are derived. These constants are studied by calculating the total conserved charge associated to each solution. The study has shown that the obtained solutions represent Schwarzschild-Ads spacetime.
description: This paper has been withdrawn by the author
title: Essays on labour frictions in interwar Britain
Creators: name: Luzardo-Luna, Ivan
Publisher: name: London School of Economics and Political Science (LSE)
Year: 2021

description: This thesis examines the determinants of the high levels of structural unemployment in interwar Britain by following a `search and matching' approach. After an extensive literature review in Chapter 1, Chapter 2 estimates the matching function of the British labour market for the period 1921-1934. The changes in matching efficiency can explain the high and persistent unemployment observed from the second half of the 1920s onwards, and this was accelerated by the onset of the Great Depression. Early in the 1920s, matching efficiency improved due to the development of the retail industry. However, the econometric results show a structural break in March 1927, related to a major industrial reshuffling that reduced demand for workers in the staple industries. Due to the regional polarisation of the British labour market, spatial mismatching has the potential to explain the high level of unemployment during the interwar years. Chapter 3 uses the regional returns of the Unemployment Insurance administration to estimate the aggregate and regional Beveridge curve shifts with a vector error correction model (VECM). This estimation finds that spatial mismatching and frictions within regions, accounted for 21% and 79% of structural unemployment, respectively. Within the frictions inside the regions, the case of the north of England was particularly important, and this area accounted for 42% of the national labour frictions. Chapter 4 estimates the drivers behind structural unemployment for the counties located in the north of England and Scotland between January 1928 and November 1931, using Arellano-Bond's Generalized Method of Moments estimator for a dynamic panel model. The results find that high labour frictions in the north of England were related to an important increase in the ratio of average paid unemployment benefits to nominal wages in the most populated counties in this region, which also contained a large share of unemployed female workers and suffered a high frequency of temporary stoppages within the unemployed pool.
On monotone Fourier coefficients of a function belonging to Nikol'ski\uı--Besov classes
Creators: name: Berisha, Muharrem Q.
name: Berisha, Faton M.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 42A16

description: In this paper, necessary and sufficient conditions on terms of monotone Fourier coefficients for a function to belong to a Nikol'ski\uı--Besov type class are given.
description: 11 pages
Holographic interpretations of the renormalization group
Creators: name: Balasubramanian, Vijay
name: Guica, Monica
name: Lawrence, Albion
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In semiclassical holographic duality, the running couplings of a field theory are conventionally identified with the classical solutions of field equations in the dual gravitational theory. However, this identification is unclear when the bulk fields fluctuate. Recent work has used a Wilsonian framework to propose an alternative identification of the running couplings in terms of non-fluctuating data; in the classical limit, these new couplings do not satisfy the bulk equations of motion. We study renormalization scheme dependence in the latter formalism, and show that a scheme exists in which couplings to single trace operators realize particular solutions to the bulk equations of motion, in the semiclassical limit. This occurs for operators with dimension $Δ\notin \frac{d}{2} + \ZZ$, for sufficiently low momenta. We then clarify the relation between the saddle point approximation to the Wilsonian effective action ($S_W$) and boundary conditions at a cutoff surface in AdS space. In particular, we interpret non-local multi-trace operators in $S_W$ as arising in Lorentzian AdS space from the temporary passage of excitations through the UV region that has been integrated out. Coarse-graining these operators makes the action effectively local.
description: 30 pages including cover page and references, 3 figures. v2: References added
Dynamics on supersingular K3 surfaces
Creators: name: Schütt, M.
Publisher: name: Zürich : European Mathematical Society Publishing House
Year: 2016
Subjects: subject: Automorphism
subject: Elliptic fibration
subject: K3 surface
subject: Lift-ability
subject: Salem number
subject: Supersingular
subject: Dewey Decimal Classification::500 | Naturwissenschaften::510 | Mathematik

description: For any odd characteristic p ≡ 2 mod 3, we exhibit an explicit automorphism on the supersingular K3 surface of Artin invariant one which does not lift to any characteristic zero model. Our construction builds on elliptic fibrations to produce a closed formula for the automorphism's characteristic polynomial on second cohomology, which turns out to be an irreducible Salem polynomial of degree 22 with coefficients varying with p. © Swiss Mathematical Society.
Pruned discrete random samples
Creators: name: Grübel, Rudolf
name: Hitczenko, Pawel
Publisher: name: Cambridge : Cambridge University Press
Year: 2013
Subjects: subject: Chinese restaurant process
subject: Digital search trees
subject: Geometric distribution
subject: Maxima
subject: Tail behaviour
subject: Dewey Decimal Classification::500 | Naturwissenschaften::510 | Mathematik

description: Let Xi, i N, be independent and identically distributed random variables with values in N0. We transform ('prune') the sequence {X1, ⋯ , Xn}, n N, of discrete random samples into a sequence {0, 1, 2, ⋯ , Yn}, n ? N, of contiguous random sets by replacing Xn+1 with Yn+1 if Xn+1 > Yn. We consider the asymptotic behaviour of Yn as n. Applications include path growth in digital search trees and the number of tables in Pitman's Chinese restaurant process if the latter is conditioned on its limit value. © 2013 Applied Probability Trust.
title: Touch-screen Behavioural Biometrics on Mobile Devices
Creators: name: Ellavarason, Elakkiya
Publisher: name: University of Kent
Year: 2021

description: Robust user verification on mobile devices is one of the top priorities globally from a financial security and privacy viewpoint and has led to biometric verification complementing or replacing PIN and password methods. Research has shown that behavioural biometric methods, with their promise of improved security due to inimitable nature and the lure of unintrusive, implicit, continuous verification, could define the future of privacy and cyber security in an increasingly mobile world. Considering the real-life nature of problems relating to mobility, this study aims to determine the impact of user interaction factors that affect verification performance and usability for behavioural biometric modalities on mobile devices. Building on existing work on biometric performance assessments, it asks: To what extent does the biometric performance remain stable when faced with movements or change of environment, over time and other device related factors influencing usage of mobile devices in real-life applications? Further it seeks to provide answers to: What could further improve the performance for behavioural biometric modalities? Based on a review of the literature, a series of experiments were executed to collect a dataset consisting of touch dynamics based behavioural data mirroring various real-life usage scenarios of a mobile device. Responses were analysed using various uni-modal and multi-modal frameworks. Analysis demonstrated that existing verification methods using touch modalities of swipes, signatures and keystroke dynamics adapt poorly when faced with a variety of usage scenarios and have challenges related to time persistence. The results indicate that a multi-modal solution does have a positive impact towards improving the verification performance. On this basis, it is recommended to explore alternatives in the form of dynamic, variable thresholds and smarter template selection strategy which hold promise. We believe that the evaluation results presented in this thesis will streamline development of future solutions for improving the security of behavioural-based modalities on mobile biometrics.
Spectral dimension flow on continuum random multigraph
Creators: name: Giasemidis, Georgios
name: Wheater, John F.
name: Zohren, Stefan
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We review a recently introduced effective graph approximation of causal dynamical triangulations (CDT), the multigraph ensemble. We argue that it is well suited for analytical computations and that it captures the physical degrees of freedom which are important for the reduction of the spectral dimension as observed in numerical simulations of CDT. In addition multigraph models allow us to study the relationship between the spectral dimension and the Hausdorff dimension, thus establishing a link to other approaches to quantum gravity
description: 6 pages, 1 figure, to appear in the Proceedings of Sixth International School on Field Theory and Gravitation 2012 (Petropolis, Brazil)
Mesoporous TiO2 nanostructures: A route to minimize Pt loading on titania photocatalysts for hydrogen production
Creators: name: Kandiel, Tarek A.
name: Ismail, Adel A.
name: Bahnemann, Detlef W.
Publisher: name: Cambridge : Royal Society of Chemistry
Year: 2011
Subjects: subject: TiO2
subject: nanocrystals
subject: Platinum nanoparticles
subject: small angle X-ray diffraction (SXRD)
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: Mesostructured TiO2 nanocrystals have been prepared using Pluronic F127 as the structure-directing agent. Platinum nanoparticles at different contents (0.1-1.0 wt%) have been photochemically deposited onto the mesoporous TiO2. TEM investigation of 0.2 wt% Pt/TiO2 calcined at 450 °C reveals that the TiO2 particles are quite uniform in size and shape with the particle sizes of TiO2 and Pt being 10 and 3 nm, respectively. The photocatalytic activities of the Pt loaded TiO2 have been assessed and compared with those of nonporous commercial Pt/TiO2-P25 by determining the rates and the photonic efficiencies of molecular hydrogen production from aqueous methanol solutions. The results show that the amount of hydrogen evolved on Pt/TiO2-450 at low Pt loading (0.2 wt%) is three times higher than that evolved on Pt/TiO2-P25 and twelve times higher than that evolved on Pt/TiO 2-350. Despite the BET surface area of the TiO2-450 photocatalyst being 3.5 times higher than that of TiO2-P25, a 60% smaller amount of the Pt co-catalyst is required to obtain the optimum photocatalytic hydrogen production activity. The reduced Pt loading on the mesoporous TiO2 will be important both from a commercial and an ecological point of view. © 2011 the Owner Societies.
The optimal drawings of K_{5,n}
Creators: name: Hernandez-Velez, Cesar
name: Medina, Carolina
name: Salazar, Gelasio
Publisher: name: arXiv
Year: 2012
Subjects: subject: Combinatorics (math.CO)
subject: Computational Geometry (cs.CG)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 05C10, 05C62, 68R10

description: Zarankiewicz's Conjecture (ZC) states that the crossing number cr$(K_{m,n})$ equals $Z(m,n):=\floor{\frac{m}{2}} \floor{\frac{m-1}{2}} \floor{\frac{n}{2}} \floor{\frac{n-1}{2}}$. Since Kleitman's verification of ZC for $K_{5,n}$ (from which ZC for $K_{6,n}$ easily follows), very little progress has been made around ZC; the most notable exceptions involve computer-aided results. With the aim of gaining a more profound understanding of this notoriously difficult conjecture, we investigate the optimal (that is, crossing-minimal) drawings of $K_{5,n}$. The widely known natural drawings of $K_{m,n}$ (the so-called Zarankiewicz drawings) with $Z(m,n)$ crossings contain antipodal vertices, that is, pairs of degree-$m$ vertices such that their induced drawing of $K_{m,2}$ has no crossings. Antipodal vertices also play a major role in Kleitman's inductive proof that cr$(K_{5,n}) = Z(5,n)$. We explore in depth the role of antipodal vertices in optimal drawings of $K_{5,n}$, for $n$ even. We prove that if {$n \equiv 2$ (mod 4)}, then every optimal drawing of $K_{5,n}$ has antipodal vertices. We also exhibit a two-parameter family of optimal drawings $D_{r,s}$ of $K_{5,4(r+s)}$ (for $r,s\ge 0$), with no antipodal vertices, and show that if $n\equiv 0$ (mod 4), then every optimal drawing of $K_{5,n}$ without antipodal vertices is (vertex rotation) isomorphic to $D_{r,s}$ for some integers $r,s$. As a corollary, we show that if $n$ is even, then every optimal drawing of $K_{5,n}$ is the superimposition of Zarankiewicz drawings with a drawing isomorphic to $D_{r,s}$ for some nonnegative integers $r,s$.
description: In the previous version the bibliography was missing. Otherwise this is identical as Version 1
Quantitative information in decay curves obtained with a pulsed ion mobility spectrometer
Creators: name: Baether, Wolfgang
name: Zimmermann, Stefan
name: Gunzer, Frank
Publisher: name: Cambridge : Royal Society of Chemistry
Year: 2012
Subjects: subject: alkanone
subject: ion
subject: methylethyl ketone
subject: article
subject: chemistry
subject: gas
subject: mass spectrometry
subject: Butanones
subject: Gases
subject: Ions
subject: Mass Spectrometry
subject: Dewey Decimal Classification::500 | Naturwissenschaften::540 | Chemie

description: Ion mobility spectrometry (IMS) is well known for its very high sensitivity, and thus IMS spectra are commonly used in the identification of trace gases. Extracting quantitative information from IMS spectra is, in contrast, difficult, especially regarding the reproducibility due to the nature of the processes involved in the measurement of the spectra. Here we present data extracted from signal decay curves obtained with a pulsed IMS, which can support the determination of substance concentrations in the lower ppb range with good stability. © 2012 The Royal Society of Chemistry.
Autonomous and interconnected technologies for the container supply chain: The MOSES Concept
Creators: name: Ventikos, Nikolaos P.
name: Louzis, Konstantinos
name: Kanellopoulos, Ioannis
name: Krikigianni, Eleni
name: Latsa, Evangelia
name: Hagesteijn, Gerco
name: Cozijn, Hans
name: Van Den Broek, Hans
Publisher: name: Zenodo
Year: 2021

description: The maritime branch of the EU container supply chain is configured as hub-andspoke networks where large containerships transport cargo to Deep-Sea Shipping (DSS) ports and a limited number of Short Sea Shipping (SSS) feeder lines and container trucks on RoPax vessels distribute cargo to smaller ports for further transhipment. However, economically, environmentally, and socially unsustainable land-based transportation still covers most of the cargo transhipment from Hub ports. MOSES aims to significantly improve the modal shift to SSS by creating sustainable feeder services to small ports that have limited or no infrastructure (Figure 1). This will be achieved by developing the following highly automated/autonomous technologies and integrating them in existing operational processes: i) a digital collaboration and matchmaking platform (MOSES platform), ii) an innovative, green feeder vessel with a robotic container handling system, iii) a manoeuvring and docking scheme where autonomous tugboats collaborate with an automated mooring system.
Additional file 1 of Effects of miR-672 on the angiogenesis of adipose-derived mesenchymal stem cells during bone regeneration
Creators: name: Chen, Mingjiao
name: Zhou, Meng
name: Fu, Yao
name: Li, Jin
name: Wang, Zi
Publisher: name: figshare
Year: 2021
Subjects: subject: Biochemistry
subject: Space Science
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Physiology
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer
subject: Hematology
subject: Computational Biology

description: Additional file 1.
On the maximum damping performance of piezoelectric switching techniques
Creators: name: Neubauer, Marcus
name: Han, Xu
name: Wallaschek, Jörg
Publisher: name: London : SAGE Publications Ltd.
Year: 2013
Subjects: subject: autonomic structures
subject: Control
subject: morphing
subject: piezoceramics
subject: piezoelectric
subject: Autonomic structures
subject: Broad frequency range
subject: Morphing
subject: Piezo-ceramics
subject: Piezoelectric switching
subject: Synchronized switch damping
subject: Theoretical calculations
subject: Piezoelectric ceramics
subject: Piezoelectricity
subject: Damping
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau

description: Synchronized switch damping on inductor offers a high damping performance in a broad frequency range. It consists of an inductor and resistor in a serial configuration, which are connected and disconnected from the piezoceramics in an alternating manner by a switch. When the switch is triggered by the vibration itself, it adapts to different excitation frequencies especially in the low frequency range. This article presents a detailed study of the damping performance of the synchronized switch damping on inductor technique. Calculations are performed in a normalized way. The optimal tuning of synchronized switch damping on inductor network parameters is derived, and the corresponding maximum damping performance is obtained. The results are further compared to standard linear inductance-resistance networks. For a validation of the theoretical results, measurements on a clamped beam test rig are performed. Therefore, the synchronized switch damping on inductor circuit is realized as a synthetic impedance in a DSpace environment. The measurement results are in good agreement with the theoretical calculations. © The Author(s) 2012.
Importance of the vane exit Mach number on the axial clearance-related losses
Creators: name: Grönman, Aki
name: Biester, Marc H.-O.
name: Turunen-Saaresti, Teemu
name: Jaatinen-Värri, Ahti
name: Backman, Jari
name: Seume, Jörg R.
Publisher: name: London : SAGE Publications Ltd.
Year: 2016
Subjects: subject: axial clearance
subject: axial gap
subject: Axial turbine
subject: turbine efficiency
subject: Aerodynamics
subject: Axial flow turbomachinery
subject: Efficiency
subject: Mach number
subject: Stators
subject: Turbines
subject: Axial clearance
subject: Axial gap
subject: Blade passing frequency
subject: Efficiency curves
subject: Turbine efficiency
subject: Turbine performance
subject: Unsteady interaction
subject: Turbine components
subject: Dewey Decimal Classification::600 | Technik::620 | Ingenieurwissenschaften und Maschinenbau::621 | Angewandte Physik

description: More efficient and physically smaller axial turbine designs are promoted to lower emissions and increase revenue. The physical size and the weight of the axial turbine can be minimised by adjusting the distance between successive stator and rotor rows. The influence of changing stator-rotor axial clearance can usually have either a positive or a negative influence on the turbine performance, and the reasons for this varying behaviour are not currently fully understood. A previous study revealed several design parameters that correlate with the efficiency curve shape. However, the effects of two parameters, namely the stator outlet Mach number and the reduced blade passing frequency, still remained unclear. Therefore, a novel approach is taken to analyse the correlations between the two design parameters and the axial clearance efficiency curve shape. Several different turbines are analysed using data available in the literature, and also new data are presented. The study suggests that the stator outlet Mach number correlates reasonably well with the efficiency curve shape, and it was further linked to five loss mechanisms and the rotational speed. Although the unsteady interaction plays an important role in the loss share, the level of unsteadiness did not correlate with the efficiency curve shape. © 2015 Institution of Mechanical Engineers.
Comparison of three airborne laser bathymetry data sets for monitoring the German Baltic Sea Coast
Creators: name: Song, Yujin
name: Niemeyer, Joachim
name: Ellmer, Wilfried
name: Sörgel, Uwe
name: Heipke, Christian
Publisher: name: Bellingham, WA : S P I E - International Society for Optical Engineering
Year: 2015
Subjects: subject: 3D point cloud
subject: accuracy
subject: Airborne laser bathymetry (ALB)
subject: coastal
subject: Secchi depth
subject: Bathymetry
subject: Data acquisition
subject: Hydrophilicity
subject: Remote sensing
subject: Sea ice
subject: Surveying
subject: Airborne laser bathymetries
subject: Hydrographic surveys
subject: Konferenzschrift
subject: Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik

description: Airborne laser bathymetry (ALB) can be used for hydrographic surveying with relative high resolution in shallow water. In this paper, we examine the applicability of this technique based on three flight campaigns. These were conducted between 2012 and 2014 close to the island of Poel in the German Baltic Sea. The first data set was acquired by a Riegl VQ-820-G sensor in November 2012. The second and third data sets were acquired by a Chiroptera sensor of Airborne Hydrography AB in September 2013 and May 2014, respectively. We examine the 3D points classified as seabed under different conditions during data acquisition, e.g. the turbidity level of the water and the flight altitude. The analysis comprises the point distribution, point density, and the area coverage in several depth levels. In addition, we determine the vertical accuracy of the 3D seabed points by computing differences to echo sounding data. Finally, the results of the three flight campaigns are compared to each other and analyzed with respect to the different conditions during data acquisition. For each campaign only small differences in elevation between the laser and the echo sounding data set are observed. The ALB results satisfy the requirements of IHO Standards for Hydrographic Surveys (S-44) Order 1b for several depth intervals. © 2015 SPIE.
Klaus Fehn. Die zentralörtlichen Funktionen früher Zentren in Altbayern. Raumbindende Umlandbeziehungen im bayerisch-österreichischen Altsiedelland von der Spätlatènezeit bis zum Ende des Hochmittelalters, 1970
Creators: name: Störmer, Wilhelm
Publisher: name: Francia
Year: 2019

description: -
description: Francia, Bd. 2 (1974)
Guy Arbellot, La Cartographie statistique automatique appliquée à l’histoire. Une expérience sur 332 villes et villages de Haute-Champagne aux XVIIe et XVIIIe siècles, 1970
Creators: name: Cremer, Albert
Publisher: name: Francia
Year: 2019

description: -
description: Francia, Bd. 2 (1974)