cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Entanglement cost and quantum channel simulation
Creators: name: Wilde, Mark M.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Physics (quant-ph)
subject: Information Theory (cs.IT)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: This paper proposes a revised definition for the entanglement cost of a quantum channel $\mathcal{N}$. In particular, it is defined here to be the smallest rate at which entanglement is required, in addition to free classical communication, in order to simulate $n$ calls to $\mathcal{N}$, such that the most general discriminator cannot distinguish the $n$ calls to $\mathcal{N}$ from the simulation. The most general discriminator is one who tests the channels in a sequential manner, one after the other, and this discriminator is known as a quantum tester [Chiribella et al., Phys. Rev. Lett., 101, 060401 (2008)] or one who is implementing a quantum co-strategy [Gutoski et al., Symp. Th. Comp., 565 (2007)]. As such, the proposed revised definition of entanglement cost of a quantum channel leads to a rate that cannot be smaller than the previous notion of a channel's entanglement cost [Berta et al., IEEE Trans. Inf. Theory, 59, 6779 (2013)], in which the discriminator is limited to distinguishing parallel uses of the channel from the simulation. Under this revised notion, I prove that the entanglement cost of certain teleportation-simulable channels is equal to the entanglement cost of their underlying resource states. Then I find single-letter formulas for the entanglement cost of some fundamental channel models, including dephasing, erasure, three-dimensional Werner--Holevo channels, epolarizing channels (complements of depolarizing channels), as well as single-mode pure-loss and pure-amplifier bosonic Gaussian channels. These examples demonstrate that the resource theory of entanglement for quantum channels is not reversible. Finally, I discuss how to generalize the basic notions to arbitrary resource theories.
description: 28 pages, 7 figures
Drude weight in hard core Boson systems: possibility of a finite temperature ideal conductor
Creators: name: Majumder, Gourab
name: Garg, Arti
Publisher: name: arXiv
Year: 2016
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We calculate the Drude weight in the superfluid (SF) and the supersolid (SS) phases of hard core boson (HCB) model using stochastic series expansion (SSE). We demonstrate from our numerical calculations that the normal phase of HCBs in two dimensions can be an ideal conductor with dissipationless transport. In two dimensions, when the ground state is a SF, the superfluid stiffness drops to zero with a Kosterlitz-Thouless type transition at $T_{KT}$. The Drude weight, though is equal to the stiffness below $T_{KT}$, surprisingly stays finite even for temperatures above $T_{KT}$ indicating the non-dissipative transport in the normal state of this system. In contrast to this in a three dimensional SF phase, where the superfluid stiffness goes to zero continuously with a second order phase transition at $T_c$, Drude weight also goes to zero at $T_c$ as expected. We also calculated the Drude weight in a 2D SS phase, where the charge density wave (CDW) order coexists with superfluidity. For the SS phase we studied, superfluidity is lost via Kosterlitz-Thouless transition at $T_{KT}$ and the transition temperature for the CDW order is larger than $T_{KT}$. In striped SS phase where the CDW order breaks the rotational symmetry of the lattice, for $T > T_{KT}$, the system behaves like an ideal conductor along one of the lattice direction while along the other direction it behaves like an insulator. In contrast to this, in star-SS phase, Drude weight along both the lattice directions goes to zero along with the superfluid stiffness and for $T > T_{KT}$ we have a finite temperature phase of a CDW insulator.
description: 12 pages, 18 figures
A minimal-length approach unifies rigidity in under-constrained materials
Creators: name: Merkel, Matthias
name: Baumgarten, Karsten
name: Tighe, Brian P.
name: Manning, M. Lisa
Publisher: name: arXiv
Year: 2018
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Biological Physics (physics.bio-ph)
subject: Tissues and Organs (q-bio.TO)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: We present a novel approach to understand geometric-incompatibility-induced rigidity in under-constrained materials, including sub-isostatic 2D spring networks and 2D and 3D vertex models for dense biological tissues. We show that in all these models a geometric criterion, represented by a minimal length $\bar\ell_\mathrm{min}$, determines the onset of prestresses and rigidity. This allows us to predict not only the correct scalings for the elastic material properties, but also the precise {\em magnitudes} for bulk modulus and shear modulus discontinuities at the rigidity transition as well as the magnitude of the Poynting effect. We also predict from first principles that the ratio of the excess shear modulus to the shear stress should be inversely proportional to the critical strain with a prefactor of three, and propose that this factor of three is a general hallmark of geometrically induced rigidity in under-constrained materials and could be used to distinguish this effect from nonlinear mechanics of single components in experiments. Lastly, our results may lay important foundations for ways to estimate $\bar\ell_\mathrm{min}$ from measurements of local geometric structure, and thus help develop methods to characterize large-scale mechanical properties from imaging data.
description: 10 pages, 5 figures
New targets for relic antineutrino capture
Creators: name: Lee, Jeong-Yeon
name: Kim, Yeongduk
name: Chiba, Satoshi
Publisher: name: arXiv
Year: 2018
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: $^{163}$Ho has been considered as a suitable candidate for the capture of relic antineutrinos. However, the detection of the relic antineutrino using $^{163}$Ho is extremely challenging with current techniques. Therefore, we have searched for new targets for relic antineutrino detections through the resonant capture on nuclides undergoing electron capture. We have investigated nuclear and atomic properties of all nuclides. And we finally propose $^{131}$Ba, $^{159}$Dy, $^{175}$Hf, $^{195}$Au, and $^{243}$Cm as new candidates for the relic antineutrino detection, and call for high precise experiments of $Q_{\rm EC}$-values and intensities of EC decays for these new candidates.
description: 9 pages, 5 figures
Comparison of Irradiance Forecasting Methods Applied for Building Solar Energy Estimation
Creators: name: Martinek, V.
name: Wolf, P.
name: Dupond, L.
Publisher: name: WIP
Year: 2018
Subjects: PV Systems - Performance, Applications and Integration
Solar Resource and Forecasting

description: 35th European Photovoltaic Solar Energy Conference and Exhibition; 1778-1781
description: The paper is focused on state-of the-art methods for local PV yield estimation in middle and very short time
horizon. Both numerical weather prediction as well as statistical approaches are discussed and the accuracy for a chosen place is
compared. The developed approach for data acquisition of irradiance sensors is discussed together with the method of image
processing. In the end general statements are made based on accuracy and suitability of each prediction method.
Heavy Higgs Bosons at Low $\tan β$: from the LHC to 100 TeV
Creators: name: Craig, Nathaniel
name: Hajer, Jan
name: Li, Ying-Ying
name: Liu, Tao
name: Zhang, Hao
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present strategies to search for heavy neutral Higgs bosons decaying to top quark pairs, as often occurs at low $\tan β$ in type II two Higgs doublet models such as the Higgs sector of the MSSM. The resonant production channel is unsatisfactory due to interference with the SM background. We instead propose to utilize same-sign dilepton signatures arising from the production of heavy Higgs bosons in association with one or two top quarks and subsequent decay to a top pair. We find that for heavier neutral Higgs bosons the production in association with one top quark provides greater sensitivity than production in association with two top quarks. We obtain current limits at the LHC using Run I data at 8 TeV and forecast the sensitivity of a dedicated analysis during Run II at 14 TeV. Then we perform a detailed BDT study for the 14 TeV LHC and a future 100 TeV collider.
description: published version, 22 pages, 15 figures, 3 tables
The Anatomy of a Cryptocurrency Pump-and-Dump Scheme
Creators: name: Xu, Jiahua
name: Livshits, Benjamin
Publisher: name: arXiv
Year: 2018
Subjects: subject: Trading and Market Microstructure (q-fin.TR)
subject: Machine Learning (cs.LG)
subject: FOS: Economics and business
subject: FOS: Computer and information sciences

description: While pump-and-dump schemes have attracted the attention of cryptocurrency observers and regulators alike, this paper represents the first detailed empirical query of pump-and-dump activities in cryptocurrency markets. We present a case study of a recent pump-and-dump event, investigate 412 pump-and-dump activities organized in Telegram channels from June 17, 2018 to February 26, 2019, and discover patterns in crypto-markets associated with pump-and-dump schemes. We then build a model that predicts the pump likelihood of all coins listed in a crypto-exchange prior to a pump. The model exhibits high precision as well as robustness, and can be used to create a simple, yet very effective trading strategy, which we empirically demonstrate can generate a return as high as 60% on small retail investments within a span of two and half months. The study provides a proof of concept for strategic crypto-trading and sheds light on the application of machine learning for crime detection.
Characterization of (asymptotically) Kerr-de Sitter-like spacetimes at null infinity
Creators: name: Mars, Marc
name: Paetz, Tim-Torben
name: Senovilla, José M. M.
name: Simon, Walter
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate solutions $(\mathcal{M}, g)$ to Einstein's vacuum field equations with positive cosmological constant $Λ$ which admit a smooth past null infinity $\mathcal{J}^-$ à la Penrose and a Killing vector field whose associated Mars-Simon tensor (MST) vanishes. The main purpose of this work is to provide a characterization of these spacetimes in terms of their Cauchy data on $\mathcal{J}^-$. Along the way, we also study spacetimes for which the MST does not vanish. In that case there is an ambiguity in its definition which is captured by a scalar function $Q$. We analyze properties of the MST for different choices of $Q$. In doing so, we are led to a definition of "asymptotically Kerr-de Sitter-like spacetimes", which we also characterize in terms of their asymptotic data on $\mathcal{J}^-$.
description: 49 pages. v2: Revised version with some changes with respect to the published paper in order to amend a mistake in the statements of theorems 4 and 6 in arXiv:1307.5018v2 (corrected in v3). The validity of all results remains unaltered
IEA PVPS Task 16 and IEA SolarPACES V: State of the Project
Creators: name: Remund, J.
name: Blanc, P.
name: Perez, R.
Publisher: name: WIP
Year: 2018
Subjects: PV Systems - Performance, Applications and Integration
Solar Resource and Forecasting

description: 35th European Photovoltaic Solar Energy Conference and Exhibition; 1767-1769
description: A new joint Task of IEA Technological Collaboration Programmes PVPS and SolarPACES started in July 2017 and will last till 2020. 21 countries and 54 partners are part of the Task. Many existing partners of IEA SHC Task 46 like NREL or Mines Paristech are part but also new partners – like the Swedish met service SMHI or Energinet (TSO of Denmark). In 2018 two workshops where held to get basic information about uncertainty of resources and forecast needs. The results will be shown in this paper.
The Task offers a unique platform of exchange for private and public organizations as well as data providers and science organizations. A strong emphasis on extra gain of collaboration will be promoted. Benchmarks, standardizations, state-of the art descriptions and dissemination will be in the focus. Main added values are: lower resource uncertainties and higher forecast accuracies, which will lead to lower implementation costs of PV and CSP projects.
The first year was used to gather basic information for benchmarks and user needs. Two workshops where held of which the results will be presented. The first workshop (March 2018) was dedicated to the definition of uncertainty in dependence of climate. Up to now uncertainty information was presented differently by each service providers. A common way of definition would help the users to compare the services.
The second workshop was held at Intersolar June 2018 to get requirements concerning solar and PV forecasts for different applications. A focus was set to utilities and grid operation. Enhanced knowledge of user needs will enhance the service.
Glass transitions in monodisperse cluster-forming ensembles: vortex matter in type-1.5 superconductors
Creators: name: Diaz-Mendez, Rogelio
name: Mezzacapo, Fabio
name: Lechner, Wolfgang
name: Cinti, Fabio
name: Babaev, Egor
name: Pupillo, Guido
Publisher: name: arXiv
Year: 2016
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: At low enough temperatures and high densities, the equilibrium configuration of an ensemble of ultrasoft particles is a self-assembled, ordered, cluster-crystal. In the present work we explore the out-of-equilibrium dynamics for a two-dimensional realization, which is relevant to superconducting materials with multi-scale intervortex forces. We find that for small temperatures following a quench, the suppression of the thermally-activated particle hopping hinders the ordering. This results in a glass transition for a monodispersed ensemble, for which we derive a microscopic explanation in terms of an "effective polydispersity" induced by multi-scale interactions. This demonstrates that a vortex glass can form in clean systems of thin films of "type-1.5" superconductors. An additional setup to study this physics can be layered superconducting systems, where the shape of the effective vortex-vortex interactions can be engineered.
Strain-induced topological transition in SrRu$_2$O$_6$ and CaOs$_2$O$_6$
Creators: name: Ochi, Masayuki
name: Arita, Ryotaro
name: Trivedi, Nandini
name: Okamoto, Satoshi
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The topological property of SrRu$_2$O$_6$ and isostructural CaOs$_2$O$_6$ under various strain conditions is investigated using density functional theory. Based on an analysis of parity eigenvalues, we anticipate that a three-dimensional strong topological insulating state should be realized when band inversion is induced at the A point in the hexagonal Brillouin zone. For SrRu$_2$O$_6$, such a transition requires rather unrealistic tuning, where only the $c$ axis is reduced while other structural parameters are unchanged. However, given the larger spin-orbit coupling and smaller lattice constants in CaOs$_2$O$_6$, the desired topological transition does occur under uniform compressive strain. Our study paves a way to realize a topological insulating state in a complex oxide, which has not been experimentally demonstrated so far.
description: 7 pages, 5 figures
Preliminary constraints on the location of the recently hypothesized new planet of the Solar System from planetary orbital dynamics
Creators: name: Iorio, Lorenzo
Publisher: name: arXiv
Year: 2015
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Popular Physics (physics.pop-ph)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: (Abridged) The trajectory of Saturn is nowadays known at essentially the same accuracy level of the inner planets due to the telemetry of the Cassini spacecraft. Thus, the expected perturbations $\dot\varpi,~\dotΩ$ due to PX, for which we suggest the name Telisto in view of its remarkable distance, on the Kronian apsidal and draconitic orbital motions are theoretically investigated to tentatively constrain the configuration space of Telisto/Planet Nine itself. To this aim, we compare our predictions $\dot\varpi_\textrm{theo},~\dotΩ_\textrm{theo}$ to the currently available experimental intervals of values $Δ\dotΩ_\textrm{obs},~Δ\dot\varpi_\textrm{obs}$ determined by astronomers in the recent past without explicitly modeling and solving for PX itself. As such, our results, despite being plausible and in agreement to a large extent with other constraints released in the literature, should be regarded as proof-of-principle investigations aimed to encourage more accurate analyses in future. It turns out that the admissible region in its configuration space is moderately narrow as far as its position along its orbit, reckoned by the true anomaly $f_\textrm{X}$, is concerned, being concentrated around approximately $130~\textrm{deg}\lesssim f_\textrm{X}\lesssim 240~\textrm{deg}$. Telisto/Planet Nine is certainly far from its perihelion ($f_\textrm{X}=0~\textrm{deg}$), in agreement with other recent studies. The future analysis of the data from the ongoing New Horizons mission might be helpful in further constraining the scenario considered here for Telisto/Planet Nine. Its impact on the spaceraft's range over a multi-year span is investigated with a preliminary sensitivity analysis.
description: LaTex2e, 5 tables, 15 figures, 45 pages. Accepted for publication in Astrophysics and Space Science (ApSS)
Divergence radii and the strong converse exponent of classical-quantum channel coding with constant compositions
Creators: name: Mosonyi, Milán
name: Ogawa, Tomohiro
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Physics (quant-ph)
subject: Information Theory (cs.IT)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: There are different inequivalent ways to define the Rényi capacity of a channel for a fixed input distribution $P$. In a 1995 paper Csiszár has shown that for classical discrete memoryless channels there is a distinguished such quantity that has an operational interpretation as a generalized cutoff rate for constant composition channel coding. We show that the analogous notion of Rényi capacity, defined in terms of the sandwiched quantum Rényi divergences, has the same operational interpretation in the strong converse problem of classical-quantum channel coding. Denoting the constant composition strong converse exponent for a memoryless classical-quantum channel $W$ with composition $P$ and rate $R$ as $sc(W,R,P)$, our main result is that \[ sc(W,R,P)=\sup_{α>1}\frac{α-1}α\left[R-χ_α^*(W,P)\right], \] where $χ_α^*(W,P)$ is the $P$-weighted sandwiched Rényi divergence radius of the image of the channel.
description: 46 pages. V7: Added the strong converse exponent with cost constraint
Rearing strategies to optimise gilt and sow welfare
Creators: name: Hartnett, Phoebe
Publisher: name: University of Limerick
Year: 2024
Subjects: classificationCode: 31
subject: Biological sciences
subject: FOS: Biological sciences

description: In Ireland, replacement gilts are often reared with finisher pigs, including entire males. This exposes them to sexual mounting and aggression, which is stressful and injurious. Moreover, finisher diets do not supply necessary minerals for optimal limb health which has a negative impact on welfare and performance. The objectives of this thesis were 1) to investigate two rearing strategies we hypothesised would improve limb health in developing gilts 2) to examine the condition of the gilts’ bones and cartilage at breeding age 3) to assess carry-over effects of rearing treatments on sow welfare and performance and 4) to investigate levels of two potential biomarkers (C2C and CPII) of bone cartilage turnover, relative to bone cartilage condition and rearing treatment. Using a 2 × 2 factorial arrangement, we reared 288 gilts in either female-only (FEM) or mixed-sex (MIX) groups, and fed them either a standard finisher diet (CON), or the same diet supplemented with copper, zinc and manganese (SUPP). We expected improved limb health, welfare and performance both during rearing, and subsequently, in gilts in FEM and SUPP, and that the effects would be additive. During rearing, FEM gilts were less exposed to sexual mounting/aggression, and had improved hoof health (specifically less heel sole separation and white line lesions); the SUPP diet also reduced heel erosion. At breeding age gilts from SUPP had a greater aBMD than CON, and gilts reared in FEM had fewer cartilage lesions. The effect of rearing strategy on hoof health carried over into the early parities; FEM gilts had lower total hoof lesion and heel erosion scores, and SUPP gilts had lower horizontal crack scores. However, we found very few effects on levels of C2C or CPII. Thus, both rearing strategies had benefits for animal welfare, but validation of bone cartilage turnover biomarkers in pigs requires further research.
Deep Learning Application in Security and Privacy -- Theory and Practice: A Position Paper
Creators: name: Meister, Julia A.
name: Akram, Raja Naeem
name: Markantonakis, Konstantinos
Publisher: name: arXiv
Year: 2018
Subjects: subject: Cryptography and Security (cs.CR)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Technology is shaping our lives in a multitude of ways. This is fuelled by a technology infrastructure, both legacy and state of the art, composed of a heterogeneous group of hardware, software, services and organisations. Such infrastructure faces a diverse range of challenges to its operations that include security, privacy, resilience, and quality of services. Among these, cybersecurity and privacy are taking the centre-stage, especially since the General Data Protection Regulation (GDPR) came into effect. Traditional security and privacy techniques are overstretched and adversarial actors have evolved to design exploitation techniques that circumvent protection. With the ever-increasing complexity of technology infrastructure, security and privacy-preservation specialists have started to look for adaptable and flexible protection methods that can evolve (potentially autonomously) as the adversarial actor changes its techniques. For this, Artificial Intelligence (AI), Machine Learning (ML) and Deep Learning (DL) were put forward as saviours. In this paper, we look at the promises of AI, ML, and DL stated in academic and industrial literature and evaluate how realistic they are. We also put forward potential challenges a DL based security and privacy protection technique has to overcome. Finally, we conclude the paper with a discussion on what steps the DL and the security and privacy-preservation community have to take to ensure that DL is not just going to be hype, but an opportunity to build a secure, reliable, and trusted technology infrastructure on which we can rely on for so much in our lives.
Cinnyris infrenata Hartert
Creators: name: Pachycephalidae
name: Aegithalidae
name: Remizidae
name: Paridae
name: Sittidae
name: Neosittidae
name: Certhiidae
name: Rhabdornithidae
name: Climacteridae
name: Dicaeidae
name: Pardalotidae
name: Nectariniidae, And
name: Lecroy, Mary
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Aves
Passeriformes
Nectariniidae
Cinnyris

description: Cinnyris infrenata Hartert Cinnyris infrenata Hartert, 1903b: 29 (Tomia insula). Now Cinnyris jugularis infrenatus Hartert, 1903. White and Bruce, 1986: 405–406, and Cheke and Mann, 2008a: 296–297. HOLOTYPE: AMNH 687665, adult male, collected on Tomea (5 Tomia) Island, 05.45S, 123.56E (White and Bruce, 1986: 491), Tukang Besi Islands, Indonesia, on 23 December 1901, by Heinrich Kühn (no. 4419). From the Rothschild Collection. COMMENTS: Hartert cited Kühn’s unique field number of the holotype in the original description and listed 22 specimens from four islands, giving Kühn’s field numbers. Only 13 of these specimens came to AMNH. The 12 paratypes in AMNH are: Binongka, AMNH 687657 (Kühn no. 4229), male, 10 December 1901, AMNH 687658 (4227), male, 11 December 1901, AMNH 687659 (4226), male, 14 December 1901, AMNH 687660 (4230), female, 11 December 1901; Kalidupa, AMNH 687661 (4592), male, 1 January 1902, AMNH 687662 (4590), female, 31 December 1901; Tomia, AMNH 687663 (4418), male, 18 December 1901, AMNH 687664 (4420), male, 21 December 1901, AMNH 687666 (4414), female, 18 December 1901, AMNH 687667 (4421), female, 23 December 1901; Wantjee, AMNH 687668 (4458), male, 3 December 1901, AMNH 687669 (4459), male, 3 December 1901. Specimens, with the following Kühn numbers, that did not come to AMNH are also paratypes: Binongka, 4225, 4228, 4231; Kalidupa, 4589, 4591; Tomia, 4415, 4416, 4417; and Wantjee, 4460.
description: Published as part of Pachycephalidae, Aegithalidae, Remizidae, Paridae, Sittidae, Neosittidae, Certhiidae, Rhabdornithidae, Climacteridae, Dicaeidae, Pardalotidae, Nectariniidae, And & Lecroy, Mary, 2010, Type Specimens Of Birds In The American Museum Of Natural History Part 8. Passeriformes:, pp. 1-178 in Bulletin of the American Museum of Natural History 2010 (333) on pages 139-140
description: {"references": ["Hartert, E. 1903 b. On the birds collected on the Tukang-Besi Islands and Buton, south-east of Celebes, by Mr. Heinrich Kuhn. Novitates Zoologicae 10: 18 - 38.", "White, C. M. N., and M. D. Bruce. 1986. The birds of Wallacea. BOU Check-list no. 7. London: British Ornithologists' Union, 524 pp.", "Cheke, R. A., and C. F. Mann. 2008 a. Family Nectariniidae (sunbirds). In J. del Hoyo, A. Elliott, and D. Christie (editors), Handbook of birds of the world, volume 13: 196 - 320. Barcelona: Lynx Edicions, 880 pp., 60 pls., 536 photographs."]}
Direct Normal Irradiance Measurements Using a Tracker-Less Sunshine Duration Measurement Concept
Creators: name: Pó, J.M.
name: Hoogendijk, K.
name: Chiba, I.
name: Akiyama, A.
name: Beuttell, W.
Publisher: name: WIP
Year: 2018
Subjects: PV Systems - Performance, Applications and Integration
Solar Resource and Forecasting

description: 35th European Photovoltaic Solar Energy Conference and Exhibition; 1676-1678
description: A new concept to measure the direct normal irradiance (DNI) is evaluated. While the state of the art setup to measure the DNI is comprised of a pyrheliometer assembled on a sun tracker, the EKO MS-90 measures DNI based on a sunshine duration concept which doesn’t require a tracker to align the sensor aperture with the sun disk, presenting a relatively low-cost solution to measure DNI. In this work, we present a study of the EKO MS-90 accuracy. We evaluate the sensor measurement error by comparing the DNI measurements with the output from a reference pyrheliometer assembled on a sun tracker. The preliminary results for clear sky conditions show deviations from the reference within ±5%, for solar zenith angles smaller than 75° and DNI values higher than 700 W/m2. Larger deviations practically within 10% are observed for greater angles and lower DNI values.
Radiometer Response Time and Irradiance Measurement Accuracy
Creators: name: Driesse, A.
Publisher: name: WIP
Year: 2018
Subjects: PV Systems - Performance, Applications and Integration
Solar Resource and Forecasting

description: 35th European Photovoltaic Solar Energy Conference and Exhibition; 1679-1683
description: This study evaluates the response times of three types of ISO 9060 First Class pyrheliometers in the laboratory,
and more generally, investigates the stabilization of their output signals in response to step changes in irradiance.
Observations are similar to, but much more detailed than our previous testing of pyranometers. The link between
response time and measurement accuracy in various situations is discussed, and a model of the time-dependent
instrument response is developed which can be used to explore the achievable accuracy in specific measurement
contexts.
Самооценивание как компонент иноязычной коммуникативной компетенции в сфере профессионального общения
Creators: name: Смердина Елена Юрьевна
name: Mалахова Марина Николаевна
name: Алферова Юлия Ивановна
Publisher: name: Психопедагогика в правоохранительных органах
Year: 2020
Subjects: самооценивание; коммуникативная компетенция; анкетирование; курсант вуза МВД; Европейский языковой портфель; индивидуальные цели; профессиональное общение; осознанность

description: Введение. Актуальность темы исследования обусловлена ее недостаточной разработанностью в сфере преподавания иностранного языка в неязыковом вузе. Данная статья посвящена практике оценивания обучающимися своих коммуникативных компетенций сквозь призму определенных видов самостоятельной учебной деятельности. Цель — определить стратегии, используемые обучающимися для оценки своей коммуникативной компетенции, в частности: при работе с видеои аудиосюжетами в компьютерном классе; при изучении новой лексики (на этапе формирования лексических навыков как важной составляющей иноязычной коммуникативной компетенции); а также проанализировать связь между самооцениванием и постановкой индивидуальных целей. Материалы и методы. Изучение процесса самооценивания и анализ его результатов проводятся на примере таких видов самостоятельной учебной деятельности, как самостоятельная работа с аудиои видеоматериалами в компьютерном классе, работа с материалами периодических изданий и заполнение анкет (ведение дневника). Представлены несколько видов опросных листов: общие; по конкретной теме; по методам работы с определенным аспектом коммуникативной компетенции. Использовались следующие методы: изучение научной литературы, анализ, анкетирование. Результаты и обсуждение. Проанализированы возможности использования самооценки при выполнении конкретного вида учебной деятельности. Установлена взаимосвязь между самооцениванием и постановкой дальнейших индивидуальных целей изучения иностранного языка (например, в рамках определенной темы). Выводы. Самооценивание ведет к осознанию необходимости ставить индивидуальные цели (например, расширить лексический запас, совершенствовать грамматику и т. д.). В зависимости от вида учебной деятельности, от аспекта иноязычной профессиональной коммуникации, над которыми работает обучающийся, описан характер связи между самооцениванием и постановкой дальнейших индивидуальных целей. Такая связь наиболее очевидна при индивидуальной работе с аудиои видеоматериалами в компьютерном классе; отсроченной данная связь будет при самостоятельной (внеаудиторной) работе с материалами периодических изданий и составлении аннотаций. С помощью заполнения кратких опросников в конце занятия обобщается «сегодняшний» опыт коммуникации на иностранном языке и анализируется эффективность работы на занятии с постановкой для определения базовых стратегий при изучении какого-либо аспекта иноязычной профессиональной коммуникации, помогает более глобально взглянуть на результаты своей деятельности и поставить долгосрочные цели.
Support Vector Regression for Spatio-Temporal PV Forecasting
Creators: name: Amaro E Silva, R.
name: Teixeira Da Silva, L.C.C.
name: Brito, M.C.
Publisher: name: WIP
Year: 2018
Subjects: PV Systems - Performance, Applications and Integration
Solar Resource and Forecasting

description: 35th European Photovoltaic Solar Energy Conference and Exhibition; 1690-1695
description: Spatio-temporal PV forecasting has been showing promising results, detecting weather patterns based
on spatially-distributed solar timeseries. Support vector regression (SVR), a robust machine learning approach capable
of non-linear modelling and with good generalization ability, was tested for local forecasting with a forecast horizon
ranging the 0.5 - 3 hours using data from 57 residential-scale PV systems from the East Midlands region (United
Kingdom). The results were compared to a smart persistence and a linear autoregressive model with exogenous inputs
(ARX) approaches. -SVR led to larger forecast skill improvements for forecast horizons up to 1.5 hours, with absolute
median values between 1 – 1.5 % (7.5 – 10.5 % relative). When changing the number of input variables, the -SVR
handled better larger datasets. A sensitivity analysis showed that CPU demand increased linearly with the number of
variables as well as with the number of training examples. Adapting the -SVR to an -SVR framework led to a
substantial 85.7 % reduction with almost no impact in forecast accuracy. From the literature reviewed, this work appears
to be the first to test an SVR framework for spatio-temporal PV forecasting.
On the cross-validation bias due to unsupervised pre-processing
Creators: name: Moscovich, Amit
name: Rosset, Saharon
Publisher: name: arXiv
Year: 2019
Subjects: subject: Methodology (stat.ME)
subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: G.3
subject: 62-07

description: Cross-validation is the de facto standard for predictive model evaluation and selection. In proper use, it provides an unbiased estimate of a model's predictive performance. However, data sets often undergo various forms of data-dependent preprocessing, such as mean-centering, rescaling, dimensionality reduction, and outlier removal. It is often believed that such preprocessing stages, if done in an unsupervised manner (that does not incorporate the class labels or response values) are generally safe to do prior to cross-validation. In this paper, we study three commonly-practiced preprocessing procedures prior to a regression analysis: (i) variance-based feature selection; (ii) grouping of rare categorical features; and (iii) feature rescaling. We demonstrate that unsupervised preprocessing can, in fact, introduce a substantial bias into cross-validation estimates and potentially hurt model selection. This bias may be either positive or negative and its exact magnitude depends on all the parameters of the problem in an intricate manner. Further research is needed to understand the real-world impact of this bias across different application domains, particularly when dealing with small sample sizes and high-dimensional data.
description: 31 pages, 6 figures, 1 table. New sections: (4.2.) Experiments on a real dataset; (6.) Potential impact on model selection; (7.1.) Upper bounds based on stability arguments. Updated Fig. 1. with larger sample sizes
Quantum limits to mass sensing in a gravitational field
Creators: name: Seveso, Luigi
name: Peri, Valerio
name: Paris, Matteo G. A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We address the problem of estimating the mass of a quantum particle in a gravitational field and seek the ultimate bounds to precision of quantum-limited detection schemes. In particular, we study the effect of the field on the achievable sensitivity and address the question of whether quantumness of the probe state may provide a precision enhancement. The ultimate bounds to precision are quantified in terms of the corresponding Quantum Fisher Information. Our results show that states with no classical limit perform better than semiclassical ones and that a non-trivial interplay exists between the external field and the statistical model. More intense fields generally lead to a better precision, with the exception of position measurements in the case of freely-falling systems.
Size of a Basic Simulation Unit in PV System Partial Shading Studies
Creators: name: Lappalainen, K.
name: Valkealahti, S.
Publisher: name: WIP
Year: 2018
Subjects: PV Systems - Performance, Applications and Integration
Design and Installation of PV Systems

description: 35th European Photovoltaic Solar Energy Conference and Exhibition; 1647-1651
description: The operation of partially shaded photovoltaic (PV) systems have been studied by many research groups
during the past decades; mostly using the well-known one-diode model of a PV cell to model the electrical behaviour
of the PV systems. However, the accuracy and correctness of the used simulation tools and approaches have obtained
little attention.
This article presents a study of the effect of the size of a basic simulation unit on the accuracy of PV array
simulations, implemented using the one-diode model, under partial shading conditions resulting from cloud shadows.
The aim was to find out an adequate basic simulation unit size to be used in PV array partial shading studies to minimise
the computing time while retaining sufficient simulation accuracy. The study was based on the characteristics of
9097 measured irradiance transitions. The results show that on certain shading situations the used simulation unit size
has a notable effect on the obtained results. However, the differences in the produced energy and relative mismatch
losses during all the studied irradiance transitions, resulting from the use of a larger basic simulation unit with respect
to cell level modelling, were less than 1%. Most of the mismatch losses resulting from cloud shadows take place
between PV modules and the mismatch losses between submodules and cells can be regarded as negligible.
Verifying and Monitoring IoTs Network Behavior using MUD Profiles
Creators: name: Hamza, Ayyoob
name: Ranathunga, Dinesha
name: Gharakheili, Hassan Habibi
name: Benson, Theophilus A.
name: Roughan, Matthew
name: Sivaraman, Vijay
Publisher: name: arXiv
Year: 2019
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: IoT devices are increasingly being implicated in cyber-attacks, raising community concern about the risks they pose to critical infrastructure, corporations, and citizens. In order to reduce this risk, the IETF is pushing IoT vendors to develop formal specifications of the intended purpose of their IoT devices, in the form of a Manufacturer Usage Description (MUD), so that their network behavior in any operating environment can be locked down and verified rigorously. This paper aims to assist IoT manufacturers in developing and verifying MUD profiles, while also helping adopters of these devices to ensure they are compatible with their organizational policies and track devices network behavior based on their MUD profile. Our first contribution is to develop a tool that takes the traffic trace of an arbitrary IoT device as input and automatically generates the MUD profile for it. We contribute our tool as open source, apply it to 28 consumer IoT devices, and highlight insights and challenges encountered in the process. Our second contribution is to apply a formal semantic framework that not only validates a given MUD profile for consistency, but also checks its compatibility with a given organizational policy. We apply our framework to representative organizations and selected devices, to demonstrate how MUD can reduce the effort needed for IoT acceptance testing. Finally, we show how operators can dynamically identify IoT devices using known MUD profiles and monitor their behavioral changes on their network.
description: 17 pages, 17 figures. arXiv admin note: text overlap with arXiv:1804.04358
Disaggregation of Local Photovoltaic Generation from Composite Power Flows with Direct Measuring and Sattelite Estimations of the Irradiance: A Comparison
Creators: name: Sossan, F.
name: Scolari, E.
name: Paolone, M.
Publisher: name: WIP
Year: 2018
Subjects: PV Systems - Performance, Applications and Integration
Solar Resource and Forecasting

description: 35th European Photovoltaic Solar Energy Conference and Exhibition; 1666-1671
description: We consider the problem of estimating the unobserved
PV generation and demand from aggregated measurements
taken at a point of common coupling, e.g., at the grid
connection point of a radial distribution system. We outline the
formulation of an existing algorithm that achieves the disaggregation
task by using measurements of the composite power flow
and the local global horizontal irradiance (GHI), and compare its
performance when the estimates of the local GHI are from a local
pyranometer and when from satellite, considering HelioClim-3v.5
estimations. In the comparison, we use measurements from a reallife
setup that includes four houses with rooftop PV installations
and battery systems for PV self-consumption. Results show that
the training performed with pyranometer measurements is more
reliable than using satellite estimations.
Finite-Block-Length Analysis in Classical and Quantum Information Theory
Creators: name: Hayashi, Masahito
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: Cryptography and Security (cs.CR)
subject: Information Theory (cs.IT)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Coding technology is used in several information processing tasks. In particular, when noise during transmission disturbs communications, coding technology is employed to protect the information. However, there are two types of coding technology: coding in classical information theory and coding in quantum information theory. Although the physical media used to transmit information ultimately obey quantum mechanics, we need to choose the type of coding depending on the kind of information device, classical or quantum, that is being used. In both branches of information theory, there are many elegant theoretical results under the ideal assumption that an infinitely large system is available. In a realistic situation, we need to account for finite size effects. The present paper reviews finite size effects in classical and quantum information theory with respect to various topics, including applied aspects.
Cinnyris zenobia subsp. buruensis Hartert
Creators: name: Pachycephalidae
name: Aegithalidae
name: Remizidae
name: Paridae
name: Sittidae
name: Neosittidae
name: Certhiidae
name: Rhabdornithidae
name: Climacteridae
name: Dicaeidae
name: Pardalotidae
name: Nectariniidae, And
name: Lecroy, Mary
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Aves
Passeriformes
Nectariniidae
Cinnyris

description: Cinnyris zenobia buruensis Hartert Cinnyris zenobia buruensis Hartert, 1910b: 12 (Bara, Buru). Now Cinnyris jugularis buruensis Hartert, 1910. See White and Bruce, 1986: 405–406, and Cheke and Mann, 2008a: 296–297. HOLOTYPE: AMNH 687732, adult male, collected at Bara, 03.08S, 126.15E (Times Atlas), Buru Island, Moluccas, Indonesia, in September 1898, by J. Dumas. From the Rothschild Collection. COMMENTS: In the original description, Hartert listed as the type the single specimen collected by Dumas at Bara and mentioned that he had ‘‘a dozen males’’ from Buru. In fact, there were an additional 18 specimens that came to AMNH with the Rothschild Collection, all of which would have been in Hartert’s hand when the description was written; I consider them all paratypes, including two additional males not included by Hartert in his ‘‘dozen males’’: Fogi, Buru I., AMNH 687718–687722, three males, two females, collected in February 1902 by H. Kühn; Kayeli, Buru I., AMNH 687723– 687730, six males, two females, collected in March 1897 by W. Doherty; AMNH 687731, one male, collected in October 1898 by Dumas; Buru I., AMNH 687733–687735, three males, collected in October 1875 by collectors for A.A. Bruijn. Hartert (1900b) had reported on the collections by Dumas and Doherty on Buru, but had only noted that this species was ‘‘frequent.’’
description: Published as part of Pachycephalidae, Aegithalidae, Remizidae, Paridae, Sittidae, Neosittidae, Certhiidae, Rhabdornithidae, Climacteridae, Dicaeidae, Pardalotidae, Nectariniidae, And & Lecroy, Mary, 2010, Type Specimens Of Birds In The American Museum Of Natural History Part 8. Passeriformes:, pp. 1-178 in Bulletin of the American Museum of Natural History 2010 (333) on page 140
description: {"references": ["Hartert, E. 1910 b. [Dr. E. Hartert exhibited examples of three new birds, which he described as follows: -]. Bulletin of the British Ornithologists' Club 27: 12 - 13.", "White, C. M. N., and M. D. Bruce. 1986. The birds of Wallacea. BOU Check-list no. 7. London: British Ornithologists' Union, 524 pp.", "Cheke, R. A., and C. F. Mann. 2008 a. Family Nectariniidae (sunbirds). In J. del Hoyo, A. Elliott, and D. Christie (editors), Handbook of birds of the world, volume 13: 196 - 320. Barcelona: Lynx Edicions, 880 pp., 60 pls., 536 photographs.", "Hartert, E. 1900 b. The birds of Buru, being a list of collections made on that island by Messrs. William Doherty and Dumas. Novitates Zoologicae 7: 226 - 242, 1 plate."]}
Simplified Method for Partial Shading Losses Calculation for Series Connected PV Modules with Experimental Validation
Creators: name: Dallapiccola, M.
name: Ingenhoven, P.
name: Moser, D.
name: Stein, J.S.
Publisher: name: WIP
Year: 2018
Subjects: PV Systems - Performance, Applications and Integration
Design and Installation of PV Systems

description: 35th European Photovoltaic Solar Energy Conference and Exhibition; 1609-1614
description: Partial shading strongly affects the power output of photovoltaic systems. It occurs when the system is under non-uniform irradiance conditions due to possible obstacles, e.g. close buildings, trees, dust, clouds and other objects, which affect the incident radiation on the modules. In these conditions, the nominal properties of photovoltaic systems can be strongly reduced resulting in power losses due to current and voltage mismatch. Moreover, shaded cells dissipate power resulting in a dangerous local heating. Modules are usually connected in series or in parallel to form an array. Particularly for the series connection, partial shading can compromise the whole array power output. To avoid these problems bypass diodes were introduced in commercial modules. The aim of this work is to present a fast and accurate method to evaluate the output power and the power loss of a series connected system under partial shading including the effect of by-pass diodes. The method is interesting for optimization processes, annual calculations and for all the applications where the computational time needs to be small.