cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Innovative energy dissipating system for earthquake design and retrofit of timber structures
Creators: name: Yung, Willy Chi Wai
Publisher: name: University of British Columbia
Year: 2010

description: This thesis presents the results obtained from a preliminary investigation into the potential application of the friction damping concept to wood structures to improve their seismic response. Sliding friction devices which contain heavy duty brake lining pads have been proposed in order to enhance a wood structure's seismic performance. The devices are mounted onto a structure's shearwalls to dissipate seismic energy input during the wall's deformation in an earthquake. Prototypes of the four friction damping devices were tested to examine their hysteretic behaviour. Conventional full scale, 2.44 x 2.44 m (8 x 8 ft) timber shearwalls, typical of ones used in residential and light-commercial building applications, and ones retrofitted with the friction damping devices were tested on a shake table. Three set of tests were conducted. They involved loading the walls under unidirectional racking, static-cyclic and simulated earthquake loads. Test results from the two types of shearwalls were compared against each other and against the findings from the computer programs SADT and FRICWALL. SADT is a finite elements program which computes the load-deformation behaviour of shearwalls. FRICWALL is an inelastic time-history dynamic model which computes the response time-history of a shearwall under a simulated seismic event. The cyclic tests of the friction damping devices showed that they exhibited very stable and non-deteriorating hysteretic behaviour. The shake table tests of the full scale timber shearwalls showed that the friction damped walls were stiffer, can sustain an average of 23.7 % higher racking load and dissipate an average of 42.9 % more energy than the conventional ones before a ductile failure. Failure in the conventional walls was brittle. These results were in agreement with the SADT findings. Under slow cyclic loads, they dissipated more energy, but because their overall hysteretic behaviour was still pinched, they were just as inefficient as the conventional walls at dissipating energy. On the average, their seismic performance was only marginally better than that of the conventional wall, with an average drop of 9.6 % in peak wall deflection. This is far short of the average of 29.5 % computed by FRICWALL. Detailed analysis of the results show that due to bending in the framing members of the shearwall, the load necessary to cause slippage of the friction devices was not achieved until wall deflections in the order of 25.4 mm (1.0 in) was reached. Since only at the peak or near-peak excitation levels of an earthquake did shearwall deflections surpass this magnitude, the devices were not able to contribute to the energy dissipation of the shearwalls during the majority portion of a seismic event.
Improving the interaction of Older Adults with Socially Assistive Robots for Table setting
Creators: name: Olatunji, Samuel
name: Markfeld, Noa
name: Gutman, Dana
name: Givati, Shay
name: Sarne-Fleischmann, Vardit
name: Oron-Gilad, Tal
name: Edan, Yael
Publisher: name: arXiv
Year: 2021
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: This study provides user-studies aimed at exploring factors influencing the interaction between older adults and a robotic table setting assistant. The in-fluence of the level of automation (LOA) and level of transparency (LOT) on the quality of the interaction was considered. Results revealed that the interaction effect of LOA and LOT significantly influenced the interaction. A lower LOA which required the user to control some of the actions of the robot influenced the older adults to participate more in the interaction when the LOT was low com-pared to situations with higher LOT (more information) and higher LOA (more robot autonomy). Even though the higher LOA influenced more fluency in the interaction, the lower LOA encouraged a more collaborative form of interaction which is a priority in the design of robotic aids for older adult users. The results provide some insights into shared control designs which accommodates the preferences of the older adult users as they interact with robotic aids such as the table setting robot used in this study.
Light-matter interaction in doped microcavities
Creators: name: Averkiev, N. S.
name: Glazov, M. M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We discuss theoretically the light-matter coupling in a microcavity containing a quantum well with a two-dimensional electron gas. The high density limit where the bound exciton states are absent is considered. The matrix element of interband optical absorbtion demonstrates the Mahan singularity due to strong Coulomb effect between the electrons and a photocreated hole. We extend the non-local dielectric response theory to calculate the quantum well reflection and transmission coefficients, as well as the microcavity transmission spectra. The new eigenmodes of the system are discussed. Their implications for the steady state and time resolved spectroscopy experiments are analyzed.
description: 7 pages, 2 figures; extended version
Cargese Lectures on Extra Dimensions
Creators: name: Rattazzi, R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: I give a pedagogical introduction to the concepts and the tools that are necessary to study particle physics models in higher dimensions. I then give a more detailed presentation of warped compactifications and discuss their possible relevance to the hierarchy problem.
description: 56 pages, 11 figures, lectures given at Cargese School "Particle Physics and Cosmology: the Interface'', August 2003
The phase transition and the Quasi-Normal Modes of black Holes
Creators: name: Shen, Jianyong
name: Wang, Bin
name: Lin, Chi-Yong
name: Cai, Rong-Gen
name: Su, Ru-Keng
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We reexamined the argument that the quasinormal modes could be a probe of the phase transition of a topological black hole to a hairy configuration by investigating general scalar perturbations. We found further evidence in the quasinormal modes for this phase transition. For the general black hole configurations, we observed that although the quasinormal modes can present us different phases of different configurations, there is no dramatic change in the slope of quasinormal frequencies at the critical point of the phase transition. More detailed studies of quasinormal modes are needed to reveal the subtle behavior of the phase transition.
description: Revised version, accepted for publication in JHEP
[Northern Pomo vocabulary]
Creators: name: Vihman, Eero
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2015
Subjects: subject: pej
subject: Northern Pomo language
subject: pom
subject: Southeastern Pomo language

description: File slips with Northern Pomo vocabulary. Third of 3 boxes, this box organized alphabetically by English gloss. Includes some SE Pomo data.
Bifurcation curves of subharmonic solutions
Creators: name: Gentile, Guido
name: Bartuccelli, Michele V.
name: Deane, Jonathan H. B.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Dynamical Systems (math.DS)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 34C23, 34C25, 37C10, 37C60, 37G15

description: We revisit a problem considered by Chow and Hale on the existence of subharmonic solutions for perturbed systems. In the analytic setting, under more general (weaker) conditions, we prove their results on the existence of bifurcation curves from the nonexistence to the existence of subharmonic solutions. In particular our results apply also when one has degeneracy to first order -- i.e. when the subharmonic Melnikov function vanishes identically. Moreover we can deal as well with the case in which degeneracy persists to arbitrarily high orders, in the sense that suitable generalisations to higher orders of the subharmonic Melnikov function are also identically zero. In general the bifurcation curves are not analytic, and even when they are smooth they can form cusps at the origin: we say in this case that the curves are degenerate as the corresponding tangent lines coincide. The technique we use is completely different from that of Chow and Hale, and it is essentially based on rigorous perturbation theory.
description: 29 pages, 2 figures
Gravity and the Noncommutative Residue for Manifolds with Boundary
Creators: name: Wang, Yong
Publisher: name: arXiv
Year: 2006
Subjects: subject: Differential Geometry (math.DG)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 58G20; 53A30; 46L87

description: We prove a Kastler-Kalau-Walze type theorem for the Dirac operator and the signature operator for $3,4$-dimensional manifolds with boundary. As a corollary, we give two kinds of operator theoretic explanations of the gravitational action in the case of 4-dimensional manifolds with flat boundary.
Dynamical coupling of a mean-field dynamo and its wind: Feedback loop over a stellar activity cycle
Creators: name: Perri, Barbara
name: Brun, Allan Sacha
name: Strugarek, Antoine
name: Réville, Victor
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We focus on the connection between the internal dynamo magnetic field and the stellar wind. If the star has a cyclic dynamo, the modulations of the magnetic field can affect the wind, which in turn can back-react on the boundary conditions of the star, creating a feedback loop. We have developed a 2.5-dimensional numerical set-up to model this essential coupling. We have implemented an alpha-Omega mean-field dynamo in the PLUTO code, and then coupled it to a spherical polytropic wind model via an interface composed of four grid layers with dedicated boundary conditions. We present here a dynamo model close to a young Sun with cyclic magnetic activity. First we show how this model allows to track the influence of the dynamo activity on the corona by displaying the correlation between the activity cycle, the coronal structure and the time evolution of integrated quantities. Then we add the feedback of the wind on the dynamo and discuss the changes observed in the dynamo symmetry and the wind variations. We explain these changes in terms of dynamo modes : in this parameter regime, the feedback loop leads to a coupling between the dynamo families via a preferred growth of the quadrupolar mode. We also study our interface in terms of magnetic helicity, and show that it leads to a small injection in the dynamo. This model confirms the importance of coupling physically internal and external stellar layers, as it has a direct impact on both the dynamo and the wind.
description: 30 pages, 19 figures, accepted in the Astrophysical Journal
Arithmetical Applications of an Identity for the Vandermonde Determinant
Creators: name: Ramana, D. S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: When $\{α_i\}_{1 \leq i \leq m}$ is a sequence of distinct non-zero elements of an integral domain $A$ and $γ$ is a common multiple of the $α_i$ in $A$ we obtain, by means of a simple identity for the Vandermonde determinant, a lower bound for $\sup_{1\leq i < j \leq m}ϕ(α_i - α_j)$ in terms of $ϕ(γ)$, where $ϕ$ is a function from the nonzero elements of $A$ to ${\bf R}_{+}$ satisfying certain natural conditions. We describe several applications of this bound.
description: 10 pages comments welcome
Quantum jumps of light recording the birth and death of a photon in a cavity
Creators: name: Gleyzes, Sébastien
name: Kuhr, Stefan
name: Guerlin, Christine
name: Bernu, Julien
name: Deléglise, Samuel
name: Hoff, Ulrich Busk
name: Brune, Michel
name: Raimond, Jean-Michel
name: Haroche, Serge
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A microscopic system under continuous observation exhibits at random times sudden jumps between its states. The detection of this essential quantum feature requires a quantum non-demolition (QND) measurement repeated many times during the system evolution. Quantum jumps of trapped massive particles (electrons, ions or molecules) have been observed, which is not the case of the jumps of light quanta. Usual photodetectors absorb light and are thus unable to detect the same photon twice. They must be replaced by a transparent counter 'seeing' photons without destroying them3. Moreover, the light has to be stored over a duration much longer than the QND detection time. We have fulfilled these challenging conditions and observed photon number quantum jumps. Microwave photons are stored in a superconducting cavity for times in the second range. They are repeatedly probed by a stream of non-absorbing atoms. An atom interferometer measures the atomic dipole phase shift induced by the non-resonant cavity field, so that the final atom state reveals directly the presence of a single photon in the cavity. Sequences of hundreds of atoms highly correlated in the same state, are interrupted by sudden state-switchings. These telegraphic signals record, for the first time, the birth, life and death of individual photons. Applying a similar QND procedure to mesoscopic fields with tens of photons opens new perspectives for the exploration of the quantum to classical boundary.
A singlet and triplet excited-state dynamics study of the keto and enol tautomers of cytosine
Creators: name: Mai, Sebastian
name: Marquetand, Philipp
name: Richter, Martin
name: González-Vazquez, Jesús
name: González, Leticia
Publisher: name: arXiv
Year: 2021
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: The photoinduced excited-state dynamics of the keto and enol forms of cytosine is investigated using ab initio surface hopping in order to understand the outcome of molecular beam femtosecond pump-probe photoionization spectroscopy experiments. Both singlet and triplet states are included in the dynamics. The results show that triplet states play a significant role in the relaxation of the keto tautomer, while they are less important in the enol tautomer. In both forms, the T$_1$ state minimum is found too low in energy to be detected in standard photoionization spectroscopy experiments and therefore experimental decay times should arise from a simultaneous relaxation to the ground state and additional intersystem crossing followed by internal conversion to the T$_1$ state. In agreement with available experimental lifetimes, we observe three decay constants of 7 fs, 270 fs and 1900 fs - the first two coming from the keto tautomer and the longer one from the enol tautomer. Deactivation of the enol form is due to internal conversion to the ground state via two S$_1$/S$_0$ conical intersections of ethylenic type.
Long-term $V(RI)_{c}$ CCD photometry of pre-main-sequence stars in the association Cepheus OB3
Creators: name: Ibryamov, Sunay
name: Zidarova, Gabriela
name: Semkov, Evgeni
name: Peneva, Stoyanka
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Results from optical CCD photometric observations of 13 pre-main-sequence stars collected during the period from February 2007 to November 2020 are presented. These stars are located in the association Cepheus OB3, in the field of the young star V733 Cephei. Photometric observations, especially concerning the long-term variability of the stars, are missing in the literature. We present the first long-term $V(RI)_{c}$ monitoring for them, that cover 13 years. Results from our study indicate that all of the investigated stars manifest strong photometric variability. The presented paper is a part of our program for the photometric study of PMS stars located in active star-forming regions.
description: Accepted for publication in Research in Astronomy and Astrophysics
Farmer Cluster Activity Briefs
Creators: name: Hager, Gerid
name: Ablinger, Daniela
name: Bagnoni, Virginia
name: Banks, Gillian
name: Begg, Graham
name: Beyer, Marco
name: Bohnet, Iris C.
name: Buckerfield, Clare
name: Caselli, Alice
name: Charles, Cyrille
name: Janečková, Kristina
name: Kaasik, Riina
name: Martin, Youri
name: McHugh, Niamh
name: Moonen, Camilla
name: Ness, Ellie
name: Salehi, Aliyeh
name: Schoone, Martine
name: Trávníček, Jan
name: van Rijn, Paul
name: Varas, Gonzalo
name: Veromann, Eve
name: Vilumets, Silva
name: Warlop, François
name: Wohlmuth, Marie-Luise
Publisher: name: Zenodo
Year: 2024

description: Documentation of farmer-based biodiversity observation and monitoring activities between 2021 and 2024 in 11 FRAMEwork Farmer Clusters across Europe. 

The FRAMEwork project took a bottom-up and action-based research approach to developing biodiversity and ecosystem services (ES) observation and monitoring activities with farmers in 11 Farmer Clusters (FCs) across nine European countries. This approach was chosen to cater directly to the real-world context of the farmers, as well as their interests and needs in terms of biodiversity and ES. In total, about 70 events and activities were organised between autumn 2021 and 2024 across the 11 FCs, with more than 1,000 attendances of farmers and other local participants.

This document contains a full documentation of these activities via activity briefs.
Slow decay of concentration variance due to no-slip walls in chaotic mixing
Creators: name: Gouillart, Emmanuelle
name: Dauchot, Olivier
name: Dubrulle, Bérengère
name: Roux, Stéphane
name: Thiffeault, Jean-Luc
Publisher: name: arXiv
Year: 2008
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Chaotic mixing in a closed vessel is studied experimentally and numerically in different 2-D flow configurations. For a purely hyperbolic phase space, it is well-known that concentration fluctuations converge to an eigenmode of the advection-diffusion operator and decay exponentially with time. We illustrate how the unstable manifold of hyperbolic periodic points dominates the resulting persistent pattern. We show for different physical viscous flows that, in the case of a fully chaotic Poincare section, parabolic periodic points at the walls lead to slower (algebraic) decay. A persistent pattern, the backbone of which is the unstable manifold of parabolic points, can be observed. However, slow stretching at the wall forbids the rapid propagation of stretched filaments throughout the whole domain, and hence delays the formation of an eigenmode until it is no longer experimentally observable. Inspired by the baker's map, we introduce a 1-D model with a parabolic point that gives a good account of the slow decay observed in experiments. We derive a universal decay law for such systems parametrized by the rate at which a particle approaches the no-slip wall.
description: 17 pages, 12 figures
PHENIX measurements of heavy flavor and DY in p+p and p+Au at 200 GeV
Creators: name: Drees, Axel
Publisher: name: Zenodo
Year: 2021
Subjects: is19
phenix
heavy flavor
drell-yan
p+p
p+au
charm
bottom
vtx
dca
d-meson
dimuon

description: Talk presented at the Initial Stages 2019 conference
A Quantum Exactly Solvable Nonlinear Oscillator with quasi-Harmonic Behaviour
Creators: name: Cariñena, José F.
name: Rañada, Manuel F.
name: Santander, Mariano
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: 81Q05, 81R12, 81U15, 34B24 {\enskip}81U15, {\enskip}34B24

description: The quantum version of a non-linear oscillator, previouly analyzed at the classical level, is studied. This is a problem of quantization of a system with position-dependent mass of the form $m={(1+λx^2)}^{-1}$ and with a $\la$-dependent nonpolynomial rational potential. This $\la$-dependent system can be considered as a deformation of the harmonic oscillator in the sense that for $\la\to 0$ all the characteristics of the linear oscillator are recovered. Firstly, the $\la$-dependent Schrödinger equation is exactly solved as a Sturm-Liouville problem and the $\la$-dependent eigenenergies and eigenfunctions are obtained for both $\la>0$ and $\la<0$. The $\la$-dependent wave functions appear as related with a family of orthogonal polynomials that can be considered as $\la$-deformations of the standard Hermite polynomials. In the second part, the $\la$-dependent Schrödinger equation is solved by using the Schrödinger factorization method, the theory of intertwined Hamiltonians and the property of shape invariance as an approach. Finally, the new family of orthogonal polynomials is studied. We prove the existence of a $\la$-dependent Rodrigues formula, a generating function and $\la$-dependent recursion relations between polynomials of different orders.
description: 29 pages, 4 figures
Mode-sensitive magnetoelastic coupling in phononic-crystal magnomechanics
Creators: name: Hatanaka, D.
name: Yamaguchi, H.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Acoustically driven spin-wave resonance in a phononic crystal cavity is numerically investigated. The designed cavity enables confinement of gigahertz vibrations in a wavelength-scale point-defect structure and sustains a variety of resonance modes. Inhomogeneous strain distributions in the modes modify the magnetostrictive coupling and the spin-wave excitation susceptible to an external field orientation. In particular, a monopole-like mode in the cavity having a near-symmetrical pattern shows a subwavelength-scale mode volume and can provide a versatile acoustic excitation scheme independent on field-angle variation. Thus, the phononic-crystal platform offers an alternative approach to acoustically control the spin-wave dynamics with ultrasmall and inhomogeneous mode structures, which will be a key technology to integrate and operate large-scale magnomechanical circuits.
description: 5 pages, 4 figures
PHENIX results in small collision systems
Creators: name: Lim, Sanghoon
Publisher: name: Zenodo
Year: 2021
Subjects: is19
phenix
small systems
p+al
p+au
d+au
3he+au
flow
multiplicity
fvtx
forward-rapidity
mid-rapidity
backward-rapidity
correlations
cumulant
raa
π0
φ
nuclear
modification
heavy flavor
dimuon
b-meson
bottom

description: Talk presented at the Initial Stages 2019 conference
Adiabatic Limits, Vanishing Theorems and the Noncommutative Residue
Creators: name: Liu, Kefeng
name: Wang, Yong
Publisher: name: arXiv
Year: 2006
Subjects: subject: Differential Geometry (math.DG)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: In this paper, we compute the adiabatic limit of the scalar curvature and prove several vanishing theorems, we also derive a Kastler-Kalau-Walze type theorem for the noncommutative residue in the case of foliations.
User-centered Feedback Design in Person-following Robots for Older Adults
Creators: name: Olatunji, Samuel
name: Oron-Gilad, Tal
name: Sarne-Fleischmann, Vardit
name: Edan, Yael
Publisher: name: arXiv
Year: 2021
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Feedback design is an important aspect of person-following robots for older adults. This paper presents a user-centred design approach to ensure the design is focused on the needs and preferences of the users. A sequence of user studies with a total of 35 older adults (aged 62 years and older) was conducted to explore their preferences regarding feedback parameters for a socially assistive person-following robot. The preferred level of robot transparency and the desired content for the feedback was first explored. This was followed by an assessment of the preferred mode and timing of feedback. The chosen feedback parameters were then implemented and evaluated in a final experiment to evaluate the effectiveness of the design. Results revealed that older adults preferred to receive only basic status information. They preferred voice feedback overtone, and at a continuous rate to keep them constantly aware of the state and actions of the robot. The outcome of the study is a further step towards feedback design guidelines that could improve interaction quality for person-following robots for older adults.
Spin gap behavior in Cu$_2$Sc$_2$Ge$_4$O$_{13}$ by $^{45}$Sc nuclear magnetic resonance
Creators: name: Lue, C. S.
name: Kuo, C. N.
name: Su, T. H.
name: Redhammer, G. J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We report the results of a $^{45}$Sc nuclear magnetic resonance (NMR) study on the quasi-one-dimensional compound Cu$_2$Sc$_2$Ge$_4$O$_{13}$ at temperatures between 4 and 300 K. This material has been a subject of current interest due to indications of spin gap behavior. The temperature-dependent NMR shift exhibits a character of low-dimensional magnetism with a negative broad maximum at $T_{max}$ $\simeq $ 170 K. Below $% T_{max}$, the NMR shifts and spin lattice relaxation rates clearly indicate activated responses, confirming the existence of a spin gap in Cu$_2$Sc$_2$Ge% $_4$O$_{13}$. The experimental NMR data can be well fitted to the spin dimer model, yielding a spin gap value of about 275 K which is close to the 25 meV peak found in the inelastic neutron scattering measurement. A detailed analysis further points out that the nearly isolated dimer picture is proper for the understanding of spin gap nature in Cu$_2$Sc$_2$Ge$_4$O$_{13}$.
description: 4 pages, 6 figures, submitted to Phys. Rev. B
Observation of collectivity in p+Au, d+Au and 3HE+Au collisions in PHENIX
Creators: name: Xu, Qiao
Publisher: name: Zenodo
Year: 2021
Subjects: is19
phenix
small systems
flow
p+au
d+au
3he+au
qgp
multiplicity
forward-rapidity
mid-rapidity
backward-rapidity
correlations
fluctuations
cumulant

description: Talk presented at the Initial Stages 2019 conference
Kondo-Enhanced Andreev Tunneling in InAs Nanowire Quantum Dots
Creators: name: Sand-Jespersen, T.
name: Paaske, J.
name: Andersen, B. M.
name: Grove-Rasmussen, K.
name: Jørgensen, H. I.
name: Aagesen, M.
name: Sørensen, C.
name: Lindelof, P. E.
name: Flensberg, K.
name: Nygård, J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report measurements of the nonlinear conductance of InAs nanowire quantum dots coupled to superconducting leads. We observe a clear alternation between odd and even occupation of the dot, with sub-gap-peaks at $|V_{sd}|=Δ/e$ markedly stronger(weaker) than the quasiparticle tunneling peaks at $|V_{sd}|=2Δ/e$ for odd(even) occupation. We attribute the enhanced $Δ$-peak to an interplay between Kondo-correlations and Andreev tunneling in dots with an odd number of spins, and substantiate this interpretation by a poor man's scaling analysis.
Response of pile foundation under simulated earthquake loading
Creators: name: Dou, Huaren
Publisher: name: University of British Columbia
Year: 2010

description: An extensive series of small scale model tests on single piles embedded in sand were carried out using the hydraulic gradient similitude (HGS) technique simulating earthquake loading. The dynamic loading was applied using the shake table at the University of British Columbia. The HGS method employs a high hydraulic gradient across the sand sample to increase the effective stresses in the model simulating full scale stress conditions in the field. Since the soil behaviour is stress level dependent, the HGS technique is considered to provide a realistic simulation of the full scale pile foundation behaviour. Free vibration tests were performed to study the natural frequency response of soil-pile system, and the behaviour of the system stiffness and damping at different soil stress levels. The boundary effects are evaluated and discussed. The dynamic behaviour of pile response and soil-pile interaction were investigated over a range of shaking intensities at various exciting frequencies. The dynamic p-y curves were derived from the test data and found to be highly nonlinear and hysteretic at shallow depth. Approximate linear elastic p-y response occurs at greater depth. The test results show an insignificant and negligible influence of loading cycles for dense sand. The backbone p-y curves for sand recommended by the American Petroleum Institute (API) were computed and compared with the experimental data, and were seen to be in poor agreement. The near field hysteretic damping was estimated from the p-y hysteretic loops. The tests create a data base against which the theoretical and numerical approaches can be assessed. Predictions of the response of pile and superstructure to dynamic loading were made using different procedures of constructing p-y curves. The analyses show, generally, a reasonable agreement with test data.
Tunneling conductance of amine linked alkyl chains
Creators: name: Prodan, Emil
name: Car, Roberto
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The tunneling transport theory developed in Phys. Rev. B {\bf 76}, 115102 (2007) is applied to molecular devices made of alkyl chains linked to gold electrodes via amine groups. Using the analytic expression of the tunneling conductance derived in our previous work, we identify the key physical quantities that characterize the conductance of these devices. By investigating the transport characteristics of three devices, containing 4, 6, and 8 methyl groups, we extract the dependence of the tunneling conductance on the chain's length, which is an exponential decay law in close agreement with recent experimental data.
description: 6 pages, 6 figures; two references added in v2
The Road Towards 6G: A Comprehensive Survey
Creators: name: Jiang, Wei
name: Han, Bin
name: Habibi, Mohammad Asif
name: Schotten, Hans Dieter
Publisher: name: arXiv
Year: 2021
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: As of today, the fifth generation (5G) mobile communication system has been rolled out in many countries and the number of 5G subscribers already reaches a very large scale. It is time for academia and industry to shift their attention towards the next generation. At this crossroad, an overview of the current state of the art and a vision of future communications are definitely of interest. This article thus aims to provide a comprehensive survey to draw a picture of the sixth generation (6G) system in terms of drivers, use cases, usage scenarios, requirements, key performance indicators (KPIs), architecture, and enabling technologies. First, we attempt to answer the question of "Is there any need for 6G?" by shedding light on its key driving factors, in which we predict the explosive growth of mobile traffic until 2030, and envision potential use cases and usage scenarios. Second, the technical requirements of 6G are discussed and compared with those of 5G with respect to a set of KPIs in a quantitative manner. Third, the state-of-the-art 6G research efforts and activities from representative institutions and countries are summarized, and a tentative roadmap of definition, specification, standardization, and regulation is projected. Then, we identify a dozen of potential technologies and introduce their principles, advantages, challenges, and open research issues. Finally, the conclusions are drawn to paint a picture of "What 6G may look like?". This survey is intended to serve as an enlightening guideline to spur interests and further investigations for subsequent research and development of 6G communications systems.
description: 30 Pages, 5 figures, IEEE open Journal
Neutrino Mass Matrix from Delta(27) Symmetry
Creators: name: Ma, Ernest
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The discrete subgroup Delta(27) of SU(3) has some interesting properties which may be useful for understanding charged-lepton and neutrino mass matrices. Assigning leptons to the 3 and 3* representations of Delta(27), a simple form of the Majorana neutrino mass matrix is obtained and compared to present data.
description: 7 pages, no figure, references added, sentence corrected
Probing collision dynamics of small system collisions via high pT hadrons and direct photons by the PHENIX experiment at RHIC
Creators: name: Sakaguchi, Takao
Publisher: name: Zenodo
Year: 2021
Subjects: is19
phenix
small systems
hadron
photon
direct photon
p+au
d+au
3he+au
nuclear
modification
raa
jet
correlations
p+al
forward-rapidity
mid-rapidity
backward-rapidity
polarization
thermal photon
scaling

description: Talk presented at the Initial Stages 2019 conference
Radiating-collapsing models satisfying Karmarkar condition
Creators: name: Jaryal, Suresh C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: This paper presents a class of exact spherical symmetric solutions of the Einstein equations admitting heat-conducting anisotropic fluid as a collapsing matter. The exterior spacetime is assumed to be the Vaidya metric. This class of solutions is shown to satisfy all the energy conditions throughout the interior of the star, and the luminosity is time independent, radiating uniformly throughout the collapse.
description: 17 pages, 10 figures
Renormalization Group Analysis of a Gursey Model Inspired Field Theory
Creators: name: Hortacsu, M.
name: Lutfuoglu, B. C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We show that when a model, which is equivalent to the Gursey model classically, is gauged with a SU(N) field, we get indications of a nontrivial field theory.
description: 9 pages with 2 figures, added reference, corrected typos, published version
La lande "mésotrophe" à callune et succise de la Fagne-Famenne : Note n° 4 : les effets de la gestion conservatoire.
Creators: name: Carbonnelle, Sébastien
Publisher: name: figshare
Year: 2021
Subjects: Botany

description: La lande dite "mésotrophe" et hygrocline à Calluna vulgaris, Succisa pratensis et Carex flacca est un écosystème semi-naturel issu principalement de l'utilisation pastorale dans l'ancienne économie rurale. Exclusif, voire endémique de la Fagne-Famenne, ce groupement végétal devenu rare est sauvegardé en grande partie dans les réserves naturelles de Natagora et les lisières et layons forestiers restaurés dans le cadre du projet LIFE - Papillons.
Locally commensurate charge-density wave with three-unit-cell periodicity in YBCO
Creators: name: Vinograd, I.
name: Zhou, R.
name: Hirata, M.
name: Wu, T.
name: Mayaffre, H.
name: Krämer, S.
name: Liang, R.
name: Hardy, W. N.
name: Bonn, D. A.
name: Julien, M. -H.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: In order to identify the mechanism responsible for the formation of charge-density waves (CDW) in cuprate superconductors, it is important to understand which aspects of the CDW's microscopic structure are generic and which are material-dependent. Here, we show that, at the local scale probed by NMR, long-range CDW order in YBa2Cu3Oy is unidirectional with a commensurate period of three unit cells (lambda = 3b), implying that the incommensurability found in X-ray scattering is ensured by phase slips (discommensurations). Furthermore, NMR spectra reveal a predominant oxygen character of the CDW with an out-of-phase relationship between certain lattice sites but no specific signature of a secondary CDW with lambda = 6b associated with a putative pair-density wave. These results shed light on universal aspects of the cuprate CDW. In particular, its spatial profile appears to generically result from the interplay between an incommensurate tendency at long length scales, possibly related to properties of the Fermi surface, and local commensuration effects, due to electron-electron interactions or lock-in to the lattice.
description: Original submission (revised version available upon request)
Differential Forms and the Noncommutative Residue for Manifolds with Boundary in the Non-product Case
Creators: name: Wang, Yong
Publisher: name: arXiv
Year: 2006
Subjects: subject: Differential Geometry (math.DG)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: In this paper, for an even dimensional compact manifold with boundary which has the non-product metric near the boundary, we use the noncommutative residue to define a conformal invariant pair. For a 4-dimensional manifold, we compute this conformal invariant pair under some conditions and point out the way of computations in the general.
Ultimate field-free molecular alignment by combined adiabatic-impulsive field design
Creators: name: Guerin, S.
name: Rouzee, A.
name: Hertz, E.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We show that a laser pulse designed as an adiabatic ramp followed by a kick allows one to reach a perfect postpulse molecular alignment, free of saturation. The mechanism is based on an optimized distribution of the energy between a weakly efficient but non saturating adiabatic ramp and an efficient but saturating impulsive field. Unprecedent degrees of alignment are predicted using state-of-the-art pulse shaping techniques and non-destructive field intensities. The scheme can be extended to reach high degrees of orientation of polar molecules using designed half-cycle pulses.
description: 5 pages, 4 pages
Metastable Vacua in Flux Compactifications and Their Phenomenology
Creators: name: Lebedev, Oleg
name: Löwen, Valéri
name: Mambrini, Yann
name: Nilles, Hans Peter
name: Ratz, Michael
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In the context of flux compactifications, metastable vacua with a small positive cosmological constant are obtained by combining a sector where supersymmetry is broken dynamically with the sector responsible for moduli stabilization, which is known as the F-uplifting. We analyze this procedure in a model-independent way and study phenomenological properties of the resulting vacua.
description: 21 pages, 19 figures; v2: matches version published in JHEP
Discrete squeezed states for finite-dimensional spaces
Creators: name: Marchiolli, Marcelo A.
name: Ruzzi, Maurizio
name: Galetti, Diogenes
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We show how discrete squeezed states in an $N^{2}$-dimensional phase space can be properly constructed out of the finite-dimensional context. Such discrete extensions are then applied to the framework of quantum tomography and quantum information theory with the aim of establishing an initial study on the interference effects between discrete variables in a finite phase-space. Moreover, the interpretation of the squeezing effects is seen to be direct in the present approach, and has some potential applications in different branches of physics.
description: 16 pages; 3 figures
Color-dressed recursive relations for multi-parton amplitudes
Creators: name: Duhr, Claude
name: Hoeche, Stefan
name: Maltoni, Fabio
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Remarkable progress inspired by twistors has lead to very simple analytic expressions and to new recursive relations for multi-parton color-ordered amplitudes. We show how such relations can be extended to include color and present the corresponding color-dressed formulation for the Berends-Giele, BCF and a new kind of CSW recursive relations. A detailed comparison of the numerical efficiency of the different approaches to the calculation of multi-parton cross sections is performed.
description: 31 pages, 4 figures, 6 tables
Disorder effect on the localization/delocalization in incommensurate potential
Creators: name: Onoda, Masaru
name: Nagaosa, Naoto
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The interplay between incommensurate (IC) and random potentials is studied in a two-dimensional symplectic model with the focus on localization/delocalization problem. With the IC potential only, there appear wavefunctions localized along the IC wavevector while extended perpendicular to it. Once the disorder potential is introduced, these turn into two-dimensional anisotropic metallic states beyond the scale of the elastic mean free path, and eventually becomes localized in both directions at a critical strength of the disorder. Implications of these results to the experimental observation of the IC-induced localization is discussed.
description: 4 pages, 3 figures (7 files), RevTeX
Transfer Learning for Piano Sustain-Pedal Detection
Creators: name: Liang, Beici
name: Fazekas, György
name: Sandler, Mark
Publisher: name: arXiv
Year: 2021
Subjects: subject: Sound (cs.SD)
subject: Audio and Speech Processing (eess.AS)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Detecting piano pedalling techniques in polyphonic music remains a challenging task in music information retrieval. While other piano-related tasks, such as pitch estimation and onset detection, have seen improvement through applying deep learning methods, little work has been done to develop deep learning models to detect playing techniques. In this paper, we propose a transfer learning approach for the detection of sustain-pedal techniques, which are commonly used by pianists to enrich the sound. In the source task, a convolutional neural network (CNN) is trained for learning spectral and temporal contexts when the sustain pedal is pressed using a large dataset generated by a physical modelling virtual instrument. The CNN is designed and experimented through exploiting the knowledge of piano acoustics and physics. This can achieve an accuracy score of 0.98 in the validation results. In the target task, the knowledge learned from the synthesised data can be transferred to detect the sustain pedal in acoustic piano recordings. A concatenated feature vector using the activations of the trained convolutional layers is extracted from the recordings and classified into frame-wise pedal press or release. We demonstrate the effectiveness of our method in acoustic piano recordings of Chopin's music. From the cross-validation results, the proposed transfer learning method achieves an average F-measure of 0.89 and an overall performance of 0.84 obtained using the micro-averaged F-measure. These results outperform applying the pre-trained CNN model directly or the model with a fine-tuned last layer.
description: Published in 2019 International Joint Conference on Neural Networks (IJCNN)
The Equivariant Noncommutative Atiyah-Patodi-Singer Index Theorem
Creators: name: Wang, Yong
Publisher: name: arXiv
Year: 2006
Subjects: subject: Differential Geometry (math.DG)
subject: K-Theory and Homology (math.KT)
subject: FOS: Mathematics

description: In [Wu], the noncommutative Atiyah-Patodi-Singer index theorem was proved. In this paper, we extend this theorem to the equivariant case.
description: to appear in K-Theory
Spin-orbit coupling, edge states and quantum spin Hall criticality due to Dirac fermion confinement: The case study of graphene
Creators: name: Tkachov, Grigory
name: Hentschel, Martina
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We propose a generalized Dirac fermion description for the electronic state of graphene terminated by a zigzag edge. This description admits a spin-orbit coupling needed to preserve time-reversal invariance of the zigzag confinement, otherwise, for spinless particles, showing the parity anomaly typical of quantum electrodynamics in (2+1) dimensions. At a certain critical strength the spin-orbit coupling induces a phase transition of the quantum-spin-Hall type. It is manifested by a novel type of the edge states consisting of a Kramers' pair of counter-propagating modes with opposite spin orientations. Such edge states are capable of accumulating an integer spin in response to a transverse electric field in the absence of a magnetic one. They exist without any excitation gap in the bulk, due to which our system stands out among other quantum spin Hall systems studied earlier. We show that at the transition the local density of states is discontinuous and its energy dependence reflects the phase diagram of the system.
description: 6 pages, 3 figures
Search for gravitational waves from the coalescence of sub-solar mass and eccentric compact binaries
Creators: name: Nitz, Alexander H.
name: Wang, Yi-Fan
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We present the first search for gravitational waves from sub-solar mass compact-binary mergers which allows for non-negligible orbital eccentricity. Sub-solar mass black holes are a signature of primordial origin black holes, which may be a component of dark matter. To produce binary coalescences, primordial black holes may form close binaries either in the early universe or more recently through dynamical interactions. A signature of dynamical formation would be the observation of non-circularized orbits. We search for black hole mergers where the primary mass is $0.1-7 M_{\odot}$ and the secondary mass is $0.1-1 M_{\odot}$. We allow for eccentricity up to $\sim0.3$ at a dominant-mode gravitational-wave frequency of 10 Hz for binaries with at least one component with mass $>0.5 M_{\odot}$. We find no convincing candidates in the public LIGO data. The two most promising candidates have a false alarm rate of 1 per 3 and 4 years, respectively, which combined is only a $\sim 2.4σ$ deviation from the expected Poisson rate. Given the marginal statistical significance, we place upper limits on the rate of sub-solar mass mergers under the assumption of a null observation and compare how these limits may inform the possible dark matter contribution.
description: 7 pages, 4 figures, 1 table. Supplementary material at https://github.com/gwastro/subsolar-ecc-primordial-search, v2 fixes minor typos