cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Design of a novel compact neutron collimator
Creators: name: Bedogni, Roberto
name: Costa, Marco
name: Durisi, Elisabetta
name: Grazzi, Francesco
name: Lega, Alessandro
name: Mafucci, Ettore
name: Menzio, Luca
name: Monti, Valeria
name: Sans-Planell, Oriol
name: Visca, Lorenzo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Nuclear Experiment (nucl-ex)
subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: In this work the concept of a novel slow neutron collimator and the way to operate it are presented. The idea is based on the possibility to decouple the device field-of-view from its collimation power. A multi-channel geometry is proposed consisting of a chess-board structure where highly neutron-absorbing channels are alternated to air channels. A borated polymer was purposely developed to produce the attenuating components in the form of square-sectioned long rods. A scalable structure consisting of multiple collimation sectors can be arranged. The geometrical parameter LD, corresponding to the ratio between the length of a channel and its width, defines the collimation power. Several sectors can be arranged one after the other to reach relevant collimation powers. Each sector, 100 mm long, is composed by several channels with D = 2.5 mm corresponding to an L/D coefficient of 40. The target field of view is 50x50 mm2. This novel collimator, developed inside the INFN-ANET collaboration, due to its intrinsic compactness, will be of great importance to enhance the neutron imaging capability of small to medium-size neutron sources.
description: 8 pages, 5 figures, accepted for publication to JINST
Encrateola laevigata
Creators: name: Riedel
name: Pénigot
name: Schwarz
name: Diller
name: Johansson
name: Japoshvili, G.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Encrateola
Encrateola laevigata

description: Encrateola laevigata (RATZEBURG, 1848), det. Schwarz
M a t e r i a l e x a m i n e d: Trap4: 1♀ 15-29.vi.
D i s t r i b u t i o n: Holarctic, new record for Georgia and the Caucasus region.
description: Published as part of Riedel, Pénigot, Schwarz, Diller, Johansson & Japoshvili, G., 2023, Darwin wasps (Hymenoptera, Ichneumonidae) of the Kintrishi National Park, Sakartvelo (Georgia), with descriptions of six new species, pp. 61-153 in Linzer biologische Beiträge 55 (1) on page 121, DOI: 10.5281/zenodo.10415120
Endasys annulatus
Creators: name: Riedel
name: Pénigot
name: Schwarz
name: Diller
name: Johansson
name: Japoshvili, G.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Endasys
Endasys annulatus

description: Endasys annulatus (HABERMEHL, 1912), det. Schwarz
M a t e r i a l e x a m i n e d: Trap 7: 2♀♀ 5-20.v.
D i s t r i b u t i o n: Western Palaearctic, new record for Georgia and the Caucasus region.
description: Published as part of Riedel, Pénigot, Schwarz, Diller, Johansson & Japoshvili, G., 2023, Darwin wasps (Hymenoptera, Ichneumonidae) of the Kintrishi National Park, Sakartvelo (Georgia), with descriptions of six new species, pp. 61-153 in Linzer biologische Beiträge 55 (1) on page 121, DOI: 10.5281/zenodo.10415120
Topological obstructions to fatness
Creators: name: Florit, Luis A.
name: Ziller, Wolfgang
Publisher: name: arXiv
Year: 2010
Subjects: subject: Differential Geometry (math.DG)
subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics
subject: 53C20, 57R20, 57R22

description: Alan Weinstein showed that certain characteristic numbers of any Riemannian submersion with totally geodesic fibers and positive vertizontal curvatures are nonzero. In this paper we explicitly compute these invariants in terms of Chern and Pontrjagin numbers of the bundle. This allows us to show that many bundles do not admit such metrics.
description: 32 pages. To appear in Geom. Topol
Endasys brevis
Creators: name: Riedel
name: Pénigot
name: Schwarz
name: Diller
name: Johansson
name: Japoshvili, G.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Endasys
Endasys brevis

description: Endasys brevis (GRAVENHORST, 1829)
M a t e r i a l e x a m i n e d: Trap4:1♁1-15.vi.
D i s t r i b u t i o n: Transpalaearctic, known from Georgia (RIEDEL et al. 2018).
description: Published as part of Riedel, Pénigot, Schwarz, Diller, Johansson & Japoshvili, G., 2023, Darwin wasps (Hymenoptera, Ichneumonidae) of the Kintrishi National Park, Sakartvelo (Georgia), with descriptions of six new species, pp. 61-153 in Linzer biologische Beiträge 55 (1) on page 121, DOI: 10.5281/zenodo.10415120
Endasys senilis
Creators: name: Riedel
name: Pénigot
name: Schwarz
name: Diller
name: Johansson
name: Japoshvili, G.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Endasys
Endasys senilis

description: Endasys senilis (GMELIN, 1790)
M a t e r i a l e x a m i n e d: Trap4:1♁20.v.-1.vi.
D i s t r i b u t i o n: Western Palaearctic, known from Georgia (RIEDEL et al. 2018).
description: Published as part of Riedel, Pénigot, Schwarz, Diller, Johansson & Japoshvili, G., 2023, Darwin wasps (Hymenoptera, Ichneumonidae) of the Kintrishi National Park, Sakartvelo (Georgia), with descriptions of six new species, pp. 61-153 in Linzer biologische Beiträge 55 (1) on page 122, DOI: 10.5281/zenodo.10415120
Recent results and future prospects of kaonic nuclei at J-PARC
Creators: name: Sakuma, F.
name: Ajimura, S.
name: Akaishi, T.
name: Asano, H.
name: Bazzi, M.
name: Beer, G.
name: Bhang, H.
name: Bragadireanu, M.
name: Buehler, P.
name: Busso, L.
name: Cargnelli, M.
name: Choi, S.
name: Clozza, A.
name: Curceanu, C.
name: Enomoto, S.
name: Fujioka, H.
name: Fujiwara, Y.
name: Fukuda, T.
name: Guaraldo, C.
name: Hashimoto, T.
name: Hayano, R. S.
name: Hiraiwa, T.
name: Iio, M.
name: Iliescu, M.
name: Inoue, K.
name: Ishiguro, Y.
name: Ishikawa, T.
name: Ishimoto, S.
name: Itahashi, K.
name: Iwasaki, M.
name: Iwai, M.
name: Kanno, K.
name: Kato, K.
name: Kato, Y.
name: Kawasaki, S.
name: Kienle, P.
name: Kou, H.
name: Ma, Y.
name: Marton, J.
name: Matsuda, Y.
name: Miliucci, M.
name: Mizoi, Y.
name: Morra, O.
name: Murayama, R.
name: Nagae, T.
name: Noumi, H.
name: Ohnishi, H.
name: Okada, S.
name: Outa, H.
name: Ozawa, K.
name: Piscicchia, K.
name: Sada, Y.
name: Sakaguchi, A.
name: Sato, M.
name: Scordo, A.
name: Sekimoto, M.
name: Shi, H.
name: Shirotori, K.
name: Simon, M.
name: Sirghi, D.
name: Sirghi, F.
name: Suzuki, S.
name: Suzuki, T.
name: Tanida, K.
name: Tatsuno, H.
name: Tokuda, M.
name: Tomono, D.
name: Toyoda, A.
name: Tsukada, K.
name: Doce, O. Vázquez
name: Widmann, E.
name: Yamaga, T.
name: Yamazaki, T.
name: Yoshida, C.
name: Zhang, Q.
name: Zmeskal, J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: $\bar K$-nuclear bound systems, kaonic nuclei, have been widely discussed as products of the strongly attractive $\bar K N$ interaction in $I = 0$ channels. Recently, we demonstrated that kaonic nuclei can be produced via in-flight $(K^-,N)$ reactions using the low-momentum DC kaon beam at the J-PARC E15 experiment. We observed the simplest kaonic nuclei, $K^-pp$, having a much deeper binding energy than normal nuclei. For further studies, we have proposed a series of experimental programs for the systematic investigation of light kaonic nuclei, from $\bar K N$ ($Λ(1405)$) to $\bar K NNNN$. In the new experiment approved as J-PARC E80, we will measure the $\bar K NNN$ ($A=3$) system as a first step toward a comprehensive study.
description: 10 pages, 5 figures, proceedings of the 8th Asia-Pacific Conference on Few-Body Problems in Physics (APFB2020), accepted for publication in Fwe-Body Systems
Fisher Hartwig determinants, conformal field theory and universality in generalised XX models
Creators: name: Hutchinson, J.
name: Jones, N. G.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We discuss certain quadratic models of spinless fermions on a 1D lattice, and their corresponding spin chains. These were studied by Keating and Mezzadri in the context of their relation to the Haar measures of the classical compact groups. We show how these models correspond to translation invariant models on an infinite or semi-infinite chain, which in the simplest case reduce to the familiar XX model. We give physical context to mathematical results for the entanglement entropy, and calculate the spin-spin correlation functions using the Fisher-Hartwig conjecture. These calculations rigorously demonstrate universality in classes of these models. We show that these are in agreement with field theoretic and renormalization group arguments that we provide.
A gate-defined silicon quantum dot molecule
Creators: name: Liu, H. W.
name: Fujisawa, T.
name: Inokawa, H.
name: Ono, Y.
name: Fujiwara, A.
name: Hirayama, Y.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report electron transport measurements of a silicon double dot formed in multi-gated metal-oxide-semiconductor structures with a 15-nm-thick silicon-on-insulator layer. Tunable tunnel coupling enables us to observe an excitation spectrum in weakly coupled dots and an energy level anticrossing in strongly coupled ones. Such a quantum dot molecule with both charge and energy quantization provides the essential prerequisite for future implementation of silicon-based quantum computations.
description: 11pages,3figures
Optical spectroscopy study on single crystalline LaFeAsO
Creators: name: Chen, Z. G.
name: Yuan, R. H.
name: Dong, T.
name: Wang, N. L.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Millimeter-sized single crystals of LaFeAsO were grown from NaAs flux and the in-plane optical properties were studied over a wide frequency range. A sizable electronic correlation effect was indicated from the analysis of the free-carrier spectral weight. With decreasing temperature from 300 K, we observed a continuous suppression of the spectral weight near 0.6 eV. But a spin-density-wave gap formation at lower energy scale was seen only in the broken-symmetry state. We elaborate that both the itinerancy and local spin interactions of Fe\emph{3d} electrons are present for the FeAs-based systems; however, the establishment of the long-range magnetic order at low temperature has a dominantly itinerant origin.
description: 4 figures, 5 pages
How Do Patients Expect Apps to Provide Drug Information?
Creators: name: Grube, Anton
name: Dehling, Tobias
name: Sunyaev, Ali
Publisher: name: HICSS
Year: 2017

description: Patients use various sources to obtain information on pharmaceutical drugs. Mobile health care applications (apps) providing drug information to users are increasingly made available and of rising importance for the health care domain. However, apps usually offer functionality that only medical professionals or vendors consider useful for patients, although their considerations are not likely to meet patient expectations. In our exploratory study, we identify 33 features patients expect in apps for drug information provision with interviews and empirically assess their perceived importance in an online survey. Results indicate that patients desire personalization features for provided information but not for the app interface. This work contributes to research and practice by identifying and empirically ranking drug information provision features patients find important. We furthermore establish a foundation for future research on effective mobile drug information provision and provide insights for practice on development of patient-centered mobile health apps.
Precision measurement of gravitational frequency shift of radio signals using Rao-Cramer estimates
Creators: name: Belonenko, A. V.
name: Gusev, A. V.
name: Rudenko, V. N.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A method has been developed for precision measurement of the gravitational frequency shift of communication radio signals between the spacecraft and the ground tracking station based on the maximum likelihood principle, using the Rao-Cramer limit estimates for the kinematic parameters associated with orbital motion. Numerical illustrations of the efficiency of the method are presented using the example of data obtained in experiments with the Spectr-R satellite as part of the VLBI system in the "Radioastron" mission. A compensatory "on-line" technique for suppressing Doppler and atmospheric noise has been implemented due to the presence of two modes of communication in gravity sessions: unidirectional (1w) and looped (2w). Recipes for reducing the magnitude of systematic errors are discussed.
Deep Neural Network-based Cooperative Visual Tracking through Multiple Micro Aerial Vehicles
Creators: name: Price, Eric
name: Lawless, Guilherme
name: Bülthoff, Heinrich H.
name: Black, Michael
name: Ahmad, Aamir
Publisher: name: arXiv
Year: 2018
Subjects: subject: Robotics (cs.RO)
subject: Image and Video Processing (eess.IV)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Multi-camera full-body pose capture of humans and animals in outdoor environments is a highly challenging problem. Our approach to it involves a team of cooperating micro aerial vehicles (MAVs) with on-board cameras only. The key enabling-aspect of our approach is the on-board person detection and tracking method. Recent state-of-the-art methods based on deep neural networks (DNN) are highly promising in this context. However, real time DNNs are severely constrained in input data dimensions, in contrast to available camera resolutions. Therefore, DNNs often fail at objects with small scale or far away from the camera, which are typical characteristics of a scenario with aerial robots. Thus, the core problem addressed in this paper is how to achieve on-board, real-time, continuous and accurate vision-based detections using DNNs for visual person tracking through MAVs. Our solution leverages cooperation among multiple MAVs. First, each MAV fuses its own detections with those obtained by other MAVs to perform cooperative visual tracking. This allows for predicting future poses of the tracked person, which are used to selectively process only the relevant regions of future images, even at high resolutions. Consequently, using our DNN-based detector we are able to continuously track even distant humans with high accuracy and speed. We demonstrate the efficiency of our approach through real robot experiments involving two aerial robots tracking a person, while maintaining an active perception-driven formation. Our solution runs fully on-board our MAV's CPU and GPU, with no remote processing. ROS-based source code is provided for the benefit of the community.
String Correction for Baryon Orbital Excitations
Creators: name: Driga, O. N.
name: Narodetskii, I. M.
name: Veselov, A. I.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The correction to the string junction three-quark potential in a baryon due to the proper moment of inertia of the QCD string is calculated. The magnitudes of the string corrections in P-wave heavy baryons are estimated.
description: published version
Versatile entropic measure of grey level inhomogeneity
Creators: name: Piasecki, R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The entropic measure for analysis of grey level inhomogeneity (GLI) is proposed as a function of length scale. It allows us to quantify the statistical dissimilarity of the actual macrostate and the maximizing entropy of the reference one. The maximums (minimums) of the measure indicate those scales at which higher (lower) average grey level inhomogeneity appears compared to neighbour scales. Even a deeply hidden statistical grey level periodicity can be detected by the equally distant minimums of the measure. The striking effect of multiple intersecting curves (MIC) of the measure has been revealed for pairs of simulated patterns, which differ in shades of grey or symmetry properties, only. This indicates for a non-trivial dependence of the GLI on length scale. In turn for evolving photosphere granulation patterns, the stability in time of the first peak position has been found. Interestingly, at initial steps of the evolution clearly dominates the third peak. This indicates for a temporary grouping of granules at length scale that may belong to mesogranulation phenomenon. This behaviour has similarities with that reported by Consolini, Berrilli et al. (2003, 2005) for binarized granulation images of a different data set.
description: rewritten version with clarifications, 8 pages, added Fig. 4, references changed
GMRT unveils steep-spectrum antique filaments in the galaxy cluster Abell 725
Creators: name: Pandge, M. B.
name: Kale, Ruta
name: Dabhade, Pratik
name: Mahato, Mousumi
name: Raychaudhury, Somak
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present original GMRT radio observations of the galaxy cluster Abell~725, at a redshift of 0.09, along with other archival observations. Our GMRT maps reveal two steep-spectrum diffuse filaments in the cluster, along with a previously reported arc-like structure, and a wide-angle tail (WAT) radio source associated with the Brightest Cluster Galaxy (BCG) at the periphery of the cluster. The bent morphology of the WAT indicates that its jets have been swept back by the dynamic pressure resulting from the motion of the BCG through the surrounding intracluster medium. The BCG associated with the WAT hosts a black hole whose mass we estimate to be 1.4$\pm0.4 \times10^{9} \Msun$. We observe a 2\arcmin (195\,kpc in projection) offset between the BCG and the X-ray centroid of the galaxy cluster, which, along with other dynamic features, indicates the cluster's early stage of evolution. The WAT radio galaxy, the arc and the filaments have spectral indices $α_{612}^{240}= -0.46\pm 0.15$, $-0.8\pm0.3$, and ($-1.13\pm 0.48$, $-1.40\pm 0.50$), respectively. The WAT and the arc are connected structures, while the filaments are detached from them, but are found to be along the trail of the WAT. Based on the morphology of the components, and the progressive steepening of the components from the core of the WAT to the filaments, we propose that this system is a radio galaxy with trailing antique filaments.
description: 12 Pages, 7 Figures, 1 Appendix, 5 Tables, Accepted for publication in MNRAS
Numerical modeling and physical interplay of stochastic turbulent acceleration for non-thermal emission processes
Creators: name: Kundu, Sayan
name: Vaidya, Bhargav
name: Mignone, Andrea
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Particle acceleration is an ubiquitous phenomenon in astrophysical and space plasma. Diffusive shock acceleration (DSA) and stochastic turbulent acceleration are known to be the possible mechanisms for producing very high energetic particles, particularly in weakly magnetized regions. An interplay of different acceleration processes along with various radiation losses is typically observed in astrophysical sources. While DSA is a systematic acceleration process that energizes particles in the vicinity of shocks, stochastic turbulent acceleration (STA) is a random energizing process, where the interaction between cosmic ray particles and electromagnetic fluctuations results in particle acceleration. This process is usually interpreted as a biased random walk in energy space, modelled through a Fokker-Planck equation. In the present work, we describe a novel Eulerian algorithm, adopted to incorporate turbulent acceleration in the presence of DSA and radiative processes like synchrotron and Inverse-Compton emission. The developed framework extends the hybrid Eulerian-Lagrangian module in a full-fledged relativistic Magneto-hydrodynamic (RMHD) code PLUTO. From our validation tests and case studies, we showcase the competing and complementary nature of both acceleration processes. Axisymmetric simulations of an RMHD jet with this extended hybrid framework clearly demonstrate that emission due to shocks is localized while that due to turbulent acceleration originates in the backflow and is more diffuse, particularly in the high energy X-ray band.
description: 16 Pages, 15 Figures, Accepted for publication in The Astrophysical Journal
Universality and Anomalous Mean-Field Breakdown of Symmetry-Breaking Transitions in A Coupled Two-Component Condensate
Creators: name: Lee, Chaohong
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We study both mean-field and full quantum dynamics of symmetry-breaking transitions (SBTs) in a coupled two-component Bose-Einstein condensate. By controlling s-wave scattering lengths and coupling strength, it is possible to stimulate SBTs between normal and spontaneously polarized ground states. In static transitions, the probability maxima of full quantum ground states correspond to the mean-field ground states. In dynamical transitions, due to the vanishing of excitation gaps, the mean-field dynamics shows universal scalings obeying Kibble-Zurek mechanism. Both mean-field and full quantum defect modes appear as damped oscillations, but they appear at different critical points and undergo different oscillation regimes. The anomalous breakdown of mean-field dynamics induced by SBTs depends on the approaching direction.
description: 4 pages, 3 eps figures, revised and improved version
Connecting Polyakov Loops to the Thermodynamics of $SU(N_c)$ Gauge Theories Using the Gauge-String Duality
Creators: name: Noronha, Jorge
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We show that in four-dimensional gauge theories dual to five-dimensional Einstein gravity coupled to a single scalar field in the bulk the derivative of the single heavy quark free energy in the deconfined phase is $dF_{Q}(T)/dT \sim -1/c_s^2(T)$, where $c_s(T)$ is the speed of sound. This general result provides a direct link between the softest point in the equation of state of strongly-coupled plasmas and the deconfinement phase transition described by the expectation value of the Polyakov loop. We give an explicit example of a gravity dual with black hole solutions that can reproduce the lattice results for the expectation value of the Polyakov loop and the thermodynamics of SU(3) Yang-Mills theory in the (non-perturbative) temperature range between $T_c$ and $3T_c$.
description: 13 pages, 2 figures, minor corrections, version published in PRD
Gravity-induced phase phenomena in plate-rod colloidal mixtures
Creators: name: Eckert, Tobias
name: Schmidt, Matthias
name: Heras, Daniel de las
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Gravity can affect colloidal suspensions since for micrometer-sized particles gravitational and thermal energies can be comparable over vertical length scales of a few millimeters. In mixtures, each species possesses a different buoyant mass, which can make experimental results counter-intuitive and difficult to interpret. Here, we revisit from a theoretical perspective iconic sedimentation-diffusion-equilibrium experiments on colloidal plate-rod mixtures by van der Kooij and Lekkerkerker. We reproduce their findings, including the observation of five different mesophases in a single cuvette. Using sedimentation path theory, we incorporate gravity into a microscopic theory for the bulk of a plate-rod mixture. We also show how to disentangle the effects of gravity from sedimentation experiments to obtain the bulk behavior and make predictions that can be experimentally tested. These include changes in the sequence by altering the sample height. We demonstrate that both buoyant mass ratio and sample height form control parameters to study bulk phase behavior.
description: Published in Communications Physics
Jones House
Creators: name: Weber, Harvey A.
Publisher: name: Unknown
Year: 1970
Subjects: East Hampton
Photographs
Photos
Historic buildings
Structures
Dwellings

description: These images show several exterior and interior views of the Jones House located on Montauk Highway, including the front of the house, details on the plaque above the doors of the parlor, and the hallway and stairs. This image was taken by photographer Harvey A. Weber (1917-1991) and is part of the East Hampton’s Heritage Photo Collection.
description: Images within East Hampton Heritage Photo Collection seem to have been taken or collected in relation to the East Hampton Heritage project, but not all of them were included in the final publication. Several photographer are included in this collection.
Massive gravitons trapped inside a hypermonopole
Creators: name: De Felice, Antonio
name: Ringeval, Christophe
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We propose a regular classical field theory realisation of the Dvali-Gabadadze-Porrati mechanism by considering our universe to be the four-dimensional core of a seven dimensional 't Hooft-Polyakov hypermonopole. We show the existence of metastable gravitons trapped in the core. Their mass spectrum is discrete, positive definite, and computed for various values of the field coupling constants: the resulting Newton gravity law is seven-dimensional at small and large distances but can be made four-dimensional on intermediate length scales. There is no need of a cosmological constant in the bulk, the spacetime is asymptotically flat and of infinite volume in the extra-dimensions. Confinement is achieved through the local positive curvature of the extra-dimensions induced by the monopole-forming fields and for natural values of the coupling constants of order unity.
description: 5 pages, 3 figures, uses RevTeX
Minuscule doppelgängers, the coincidental down-degree expectations property, and rowmotion
Creators: name: Hopkins, Sam
Publisher: name: arXiv
Year: 2019
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 06A07, 06A11, 05E18

description: We relate Reiner, Tenner, and Yong's coincidental down-degree expectations (CDE) property of posets to the minuscule doppelgänger pairs studied by Hamaker, Patrias, Pechenik, and Williams. Via this relation, we put forward a series of conjectures which suggest that the minuscule doppelgänger pairs behave "as if" they had isomorphic comparability graphs, even though they do not. We further explore the idea of minuscule doppelgänger pairs pretending to have isomorphic comparability graphs by considering the rowmotion operator on order ideals. We conjecture that the members of a minuscule doppelgänger pair behave the same way under rowmotion, as they would if they had isomorphic comparability graphs. Moreover, we conjecture that these pairs continue to behave the same way under the piecewise-linear and birational liftings of rowmotion introduced by Einstein and Propp. This conjecture motivates us to study the homomesies (in the sense of Propp and Roby) exhibited by birational rowmotion. We establish the birational analog of the antichain cardinality homomesy for the major examples of posets known or conjectured to have finite birational rowmotion order (namely: minuscule posets and root posets of coincidental type).
description: 53 pages, 8 figures, comments welcome!; v2: moderate updates; v3: moderate updates, forthcoming, Experimental Mathematics
Photometry and Kinematics of Self-Gravitating Eccentric Nuclear Disks
Creators: name: Wernke, Heather N.
name: Madigan, Ann-Marie
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The Andromeda Galaxy hosts an elongated nucleus with (at least) two distinct brightness peaks. The double nucleus can be explained by the projection of a thick, apsidally-aligned eccentric nuclear disk of stars in orbit about the central black hole. Several nearby early-type galaxies have similar asymmetric nuclear features, indicating the possible presence of eccentric nuclear disks. We create simulated photometric (surface density) and kinematic (line-of-sight velocity) maps of eccentric nuclear disks using N-body simulations. We image our simulations from various lines of sight in order to classify them as double nuclei, offset nuclei, and centered nuclei. We explore the effects of mass segregation on the photometric maps, finding that heavier stars are concentrated in the brighter peak. The average line-of-sight velocity values are lower in an eccentric nuclear disk than for a circular ring about the supermassive black hole. The velocity dispersion values are higher and peak at the position of the supermassive black hole, which does not typically match the peak in photometry.
description: Accepted in ApJ
Dynamics of relativistic radio jets in asymmetric environments
Creators: name: Yates-Jones, Patrick M.
name: Shabala, Stanislav S.
name: Krause, Martin G. H.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We have carried out relativistic three-dimensional simulations of high-power radio sources propagating into asymmetric cluster environments. We offset the environment by 0 or 1 core radii (equal to 144 kpc), and incline the jets by 0, 15, or 45° away from the environment centre. The different environment encountered by each radio lobe provides a unique opportunity to study the effect of environment on otherwise identical jets. We find that the jets become unstable towards the end of the simulations, even with a Lorentz factor of 5; they nevertheless develop typical FR II radio morphology. The jets propagating into denser environments have consistently shorter lobe lengths and brighter hotspots, while the axial ratio of the two lobes is similar. We reproduce the recently reported observational anti-correlation between lobe length asymmetry and environment asymmetry, corroborating the notion that observed large-scale radio lobe asymmetry can be driven by differences in the underlying environment.
description: 13 pages, 11 figures. Accepted for publication in MNRAS
Asymptotics of correlations in the Ising model: a brief survey
Creators: name: Ott, Sébastien
name: Velenik, Yvan
Publisher: name: arXiv
Year: 2019
Subjects: subject: Probability (math.PR)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We present a brief survey of rigorous results on the asymptotic behavior of correlations between two local functions as the distance between their support diverges, concentrating on the Ising model on $\mathbb{Z}^d$ with finite-range ferromagnetic interactions.
description: Revised version: final version, as published in Panoramas et Synth\`eses; one typo corrected
Universal quantum computation using the discrete time quantum walk
Creators: name: Lovett, Neil B.
name: Cooper, Sally
name: Everitt, Matthew
name: Trevers, Matthew
name: Kendon, Viv
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A proof that continuous time quantum walks are universal for quantum computation, using unweighted graphs of low degree, has recently been presented by Childs [PRL 102 180501 (2009)]. We present a version based instead on the discrete time quantum walk. We show the discrete time quantum walk is able to implement the same universal gate set and thus both discrete and continuous time quantum walks are computational primitives. Additionally we give a set of components on which the discrete time quantum walk provides perfect state transfer.
description: 9 pages, 10 figures. Updated after referee comments - Section V expanded and minor changes to other parts of the text
Impressum
Creators: name: Redaktion, Die
Publisher: name: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Year: 2021

description: Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege, Bd. 62 Nr. 3 (2021): Burgen und Schlösser - Zeitschrift für Burgenforschung und Denkmalpflege
Discrete scattering by a pair of parallel defects
Creators: name: Sharma, Basant Lal
name: Maurya, Gaurav
Publisher: name: arXiv
Year: 2019
Subjects: subject: Mathematical Physics (math-ph)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Scattering of a time harmonic anti-plane shear wave due to either a pair of crack tips or a pair of rigid constraint tips on square lattice is considered. The two problems correspond to the so called zero-offset case of scattering due to a pair of identical Sommerfeld screens. The peculiar structural symmetry allows the reduction of coupled equations to two scalar Wiener-Hopf equations and a total of four geometrically reduced problems on lattice half-plane. Exact solution of each problem for incidence from the bulk lattice, as well as from an associated lattice waveguide, is constructed. A suitable superposition of the four expressions is used to construct the solution of the main problem. The discrete paradigm involving the wave mode incident from the waveguide is relevant for modern applications where an investigation of mechanisms of electronic and thermal transport at nanoscale remains an interesting problem.
description: Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
Geometry of branes on supergroups
Creators: name: Creutzig, Thomas
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this note we analyze the geometry of maximally symmetric boundary conditions in Lie supergroup Wess-Zumino-Novikov-Witten models. We find that generically the worldvolume of a brane is a twisted superconjugacy class, very much like in the Lie group case. Whenever the brane is not completely delocalized in the fermionic directions a new atypical class of branes arises. We give an example of these new branes and show for type I supergroups and trivial gluing conditions that they can be naturally associated with atypical representations of the affine Lie superalgebra.
description: 25 pages, 1 figure
Gate-tunable magnetoresistance in six-septuple-layer MnBi$_2$Te$_4$
Creators: name: Li, Yaoxin
name: Liu, Chang
name: Wang, Yongchao
name: Li, Hao
name: Wu, Yang
name: Zhang, Jinsong
name: Wang, Yayu
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The recently discovered antiferromagnetic topological insulator MnBi$_2$Te$_4$ hosts a variety of exotic topological quantum phases such as the axion insulator and Chern insulator states. Here we report systematic gate voltage dependent magneto transport studies in six septuple-layer MnBi$_2$Te$_4$. In p-type carrier regime, we observe positive linear magnetoresistance when MnBi$_2$Te$_4$ is polarized in the ferromagnetic state by an out-of-plane magnetic field. Whereas in n-type regime, distinct negative magnetoresistance behaviors are observed. The magnetoresistance in both regimes is highly robust against temperature even up to the Néel temperature. Within the antiferromagnetic state, the behavior of magnetoresistance exhibits a transition from negative to positive as applying a gate voltage. The boundaries between different magnetoresistance behaviors in the experimental phase diagram can be explicitly characterized by the gate-voltage-independent magnetic fields that denotes the processes of the spin-flop transition. The rich transport phenomena demonstrate the intricate interplay between topology, magnetism and dimensionality in MnBi$_2$Te$_4$.
description: 19 pages, 4 figures
Variational quantum tomography with incomplete information by means of semidefinite programs
Creators: name: Maciel, Thiago O.
name: Cesário, André T.
name: Vianna, Reinaldo O.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We introduce a new method to reconstruct unknown quantum states out of incomplete and noisy information. The method is a linear convex optimization problem, therefore with a unique minimum, which can be efficiently solved with Semidefinite Programs. Numerical simulations indicate that the estimated state does not overestimate purity, and neither the expectation value of optimal entanglement witnesses. The convergence properties of the method are similar to compressed sensing approaches, in the sense that, in order to reconstruct low rank states, it needs just a fraction of the effort correspondig to an informationally complete measurement.
description: 8 pages, 6 figures. In the previous version there was a mistake about lower bounds to arbitrary expectation values. It is now corrected
Endasys striatus
Creators: name: Riedel
name: Pénigot
name: Schwarz
name: Diller
name: Johansson
name: Japoshvili, G.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Endasys
Endasys striatus

description: Endasys striatus (KISS, 1924)
M a t e r i a l e x a m i n e d: Trap 2: 2♀♀ 2♁♁ 5-20.v.; trap 4: 1♁ 1-15.vi.; trap 15: 1♁ 30.vi.- 14.vii., 1♁ 14-28.vii., 1♁ 20.viii.-22.ix.
D i s t r i b u t i o n: Western Palaearctic, new record for Georgia and the Caucasus region.
description: Published as part of Riedel, Pénigot, Schwarz, Diller, Johansson & Japoshvili, G., 2023, Darwin wasps (Hymenoptera, Ichneumonidae) of the Kintrishi National Park, Sakartvelo (Georgia), with descriptions of six new species, pp. 61-153 in Linzer biologische Beiträge 55 (1) on page 122, DOI: 10.5281/zenodo.10415120
An application of marginal cost pricing principles to B.C. Hydro
Creators: name: Osler, Sanford Lake
Publisher: name: University of British Columbia
Year: 2010

description: The purpose of this paper is to develop and apply a methodology to determine the marginal economic costs of supplying electricity in the predominantly hydro-electric system of the British Columbia Hydro and Power Authority (B.C. Hydro). This information is used to design an economically efficient rate structure in which marginal price is set equal to marginal economic cost. The resulting implications for the growth rate in electrical demand and costs are then calculated. A computer simulation model is built which, once given a demand forecast to 1990, plans and operates the electric system in a cost minimizing fashion subject to technical constraints and the operating policies of B.C. Hydro. The associated annual accounting costs are determined and the rate levels adjusted in accordance with the Authority's financial policies. Marginal economic costs are calculated by introducing various alterations to the demand forecast and examining the implications for the present value of economic costs of such changes. These amounts, when divided by the quantity of electricity involved, give estimates of the unit costs of a change in energy and/or peak demand for various classes of customers. These marginal economic costs are then incorporated in a redesigned rate structure in which marginal prices equal these marginal costs while average prices continue to equal average accounting costs. By applying various estimates of long run own price elasticity of demand, the impact on demand growth caused by marginal price changes can be determined. This new demand forecast will, in turn, affect system design and operation and thus ultimately, costs. The result of this analysis is that the larger users (both within each class and within the system) face substantially higher marginal rates from those now in effect. In particular, the economic analysis attaches far greater weight to the energy component of demand in the energy-critical B.C. Hydro system than does the accounting approach. Under the median elasticity estimates, this rate structure reform reduces the electrical growth rate from 9.0 to 7.0 percent in the 1976-1990 period, reduces average real accounting costs from 18.1 to 16.5 mills per KWH, and reduces the gross debt outstanding in 1990 from 17.1 to 11.2 billion historic dollars. We conclude that there exists substantial gains in social welfare to be obtained from redesigning B.C. Hydro's electrical rate structures.
Attacks on Onion Discovery and Remedies via Self-Authenticating Traditional Addresses
Creators: name: Syverson, Paul
name: Finkel, Matthew
name: Eskandarian, Saba
name: Boneh, Dan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: Onion addresses encode their own public key. They are thus self-authenticating, one of the security and privacy advantages of onion services, which are typically accessed via Tor Browser. Because of the mostly random-looking appearance of onion addresses, a number of onion discovery mechanisms have been created to permit routing to an onion address associated with a more meaningful URL, such as a registered domain name. We describe novel vulnerabilities engendered by onion discovery mechanisms recently introduced by Tor Browser that facilitate hijack and tracking of user connections. We also recall previously known hijack and tracking vulnerabilities engendered by use of alternative services that are facilitated and rendered harder to detect if the alternative service is at an onion address. Self-authenticating traditional addresses (SATAs) are valid DNS addresses or URLs that also contain a commitment to an onion public key. We describe how the use of SATAs in onion discovery counters these vulnerabilities. SATAs also expand the value of onion discovery by facilitating self-authenticated access from browsers that do not connect to services via the Tor network.
description: To appear in the ACM Workshop on Privacy in the Electronic Society (WPES '21)
Scattering on square lattice from crack with damage zone
Creators: name: Sharma, Basant Lal
name: Mishuris, Gennady
Publisher: name: arXiv
Year: 2019
Subjects: subject: Classical Physics (physics.class-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 78A45, 39A14, 47A40, 74S20, 74H10, 74J20, 47A68

description: A semi-infinite crack in infinite square lattice is subjected to a wave coming from infinity, thereby leading to its scattering by the crack surfaces. A partially damaged zone ahead of the crack-tip is modeled by an arbitrarily distributed stiffness of the damaged links. While the open crack, with an atomically sharp crack-tip, in the lattice has been solved in closed form with help of {the} scalar Wiener-Hopf formulation (SIAM Journal on Applied Mathematics, 75, 1171--1192; 1915--1940), the problem considered here becomes very intricate depending on the nature of damaged links. For instance, in the case of partially bridged finite zone it involves a $2\times2$ matrix kernel of formidable class. But using an original technique, the problem, including the general case of arbitrarily damaged links, is reduced to a scalar one with the exception that it involves solving an auxiliary linear system of $N \times N$ equations where $N$ defines the length of the damage zone. The proposed method does allow, effectively, the construction of an exact solution. Numerical examples and the asymptotic approximation of the scattered field far away from the crack-tip are also presented.
Parametric resonance and spin-charge separation in 1D fermionic systems
Creators: name: Graf, Christian D.
name: Weick, Guillaume
name: Mariani, Eros
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We show that the periodic modulation of the Hamiltonian parameters for 1D correlated fermionic systems can be used to parametrically amplify their bosonic collective modes. Treating the problem within the Luttinger liquid picture, we show how charge and spin density waves with different momenta are simultaneously amplified. We discuss the implementation of our predictions for cold atoms in 1D modulated optical lattices, showing that the fermionic momentum distribution directly provides a clear signature of spin-charge separation.
description: 6 pages, 3 figures, published version
Transmission of waves across atomic step discontinuities in discrete nanoribbon structures
Creators: name: Sharma, Basant Lal
Publisher: name: arXiv
Year: 2019
Subjects: subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: Scalar wave propagation across a semi-infinite step or step-like discontinuity on any one boundary of the square lattice waveguides is considered within nearest-neighbour interaction approximation. An application of the Wiener-Hopf method does yield an exact solution of the discrete scattering problem, using which, as the main result of the paper, the transmission coefficients for energy flux are obtained. It is assumed that a wave mode is incident from either side of the step and the question addressed is what fraction of incident energy is transmitted across the atomic step discontinuity. A total of ten configurations are presented that arise due to various placements of discrete Dirichlet and Neumann boundary conditions on the waveguide. Numerical illustrations of a measure of conductance are provided.
Dark spinors with torsion in cosmology
Creators: name: Boehmer, Christian G.
name: Burnett, James
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We solve one of the open problems in Einstein-Cartan theory, namely we find a natural matter source whose spin angular momentum tensor is compatible with the cosmological principle. We analyze the resulting evolution equations and find that an epoch of accelerated expansion is an attractor. The torsion field quickly decays in that period. Our results are interpreted in the context of the standard model of cosmology.
description: 7 pages, 3 figures; reference added, minor improvements