cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Evaluation of Gel Content-Measurement-Method for Mass Production of Glass-Foil Based Crystalline Silicon PV Modules
Creators: name: Kunath, S.
name: Vogel, M.
name: Mette, M.
name: Malguth, E.
Publisher: name: WIP
Year: 2015
Subjects: OPERATIONS, PERFORMANCE AND RELIABILITY OF PHOTOVOLTAICS (FROM CELLS TO SYSTEMS)
PV Modules

description: 31st European Photovoltaic Solar Energy Conference and Exhibition; 2461-2464
description: Currently the Soxhlet extraction is the most common method in solar industry to measure the gel
content of cross linked ethylene vinyl acetate (EVA). This extraction method is insufficiently applicable for
continuous production. Therefore a new reliable measuring device was evaluated to determine the gel content. This
paper shows the results of the evaluation of the currently implemented characterization method for mass production.
The method is nondestructive and measures around three times more accurately than the Soxhlet method. Especially
the short test duration and the higher measurement accuracy enable a faster and more exact process control, quality
control and recipe evaluation. An exact gel content area distribution of single modules or the complete laminator
heating plate is possible additionally. Furthermore the dependence between the gel content and different PV-laminate
materials is demonstrated.
First-Principles Demonstration of Non-adiabatic Thouless Pumping of Electrons in A Molecular System
Creators: name: Zhou, Ruiyi
name: Yost, Dillon C.
name: Kanai, Yosuke
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We demonstrate nonadiabatic Thouless pumping of electrons in trans-polyacetylene in the framework of Floquet engineering using first-principles theory. We identify the regimes in which the quantized pump is operative with respect to the driving electric field for a time-dependent Hamiltonian. By employing the time-dependent maximally localized Wannier functions in real-time time-dependent density functional theory simulation, we connect the winding number, a topological invariant, to a molecular-level understanding of the quantized pumping. While the pumping dynamics constitutes the opposing movement of the Wannier functions that represent both double and single bonds, the resulting current is unidirectional due to the greater number of double-bond electrons. Using a gauge-invariant formulation called dynamical transition orbitals, an alternative viewpoint on the nonequilibrium dynamics is obtained in terms of the particle-hole excitation. A single time-dependent transition orbital is found to be largely responsible for the observed quantized pumping. In this representation, the pumping dynamics manifests itself in the dynamics of this single orbital as it undergoes changes from its π bonding orbital character at equilibrium to acquiring resonance and antibonding character in the driving cycle. The work demonstrates the Floquet engineering of the nonadiabatic topological state in an extended molecular system, paving the way for experimental realization of the new quantum material phase.
Influences of Lamination Condition on Device Durability for EVA-Encapsulated PV Modules
Creators: name: Zhu, J.
name: Wu, D.
name: Montiel-Chicharro, D.
name: Owen-Bellini, M.
name: Bedrich, K.
name: Betts, T.
name: Gottschalg, R.
Publisher: name: WIP
Year: 2015
Subjects: OPERATIONS, PERFORMANCE AND RELIABILITY OF PHOTOVOLTAICS (FROM CELLS TO SYSTEMS)
PV Modules

description: 31st European Photovoltaic Solar Energy Conference and Exhibition; 2465-2469
description: PV modules rely on their encapsulation to provide durability. The pottant is predominantly ethylene
vinyl acetate (EVA). It is protected by foils and glass to minimise encapsulant related degradations such as
delamination, decomposition and corrosion. Types of EVA and/or backsheet will influence overall durability, as has
been reported frequently. The lamination process as well as material handling also contributes to overall durability,
but the impact is not always obvious. This paper investigates the effect of lamination temperature on encapsulation
quality and its impact on module durability in accelerated ageing tests. A series of laminations is carried out at
different conditions within the typical window suggested by the manufacturer as well as slightly off specifications as
could occur due to insufficient temperature control. The samples were exposed to prolonged standard ageing tests for
up to 7000 hours. Use of subtractive electroluminescence (EL) images demonstrates a minimum of two different
ageing mechanisms are active at different time constants and of different activation energies (Ea).
Pteropus mahaganus Sanborn 1931
Creators: name: Koopman, Karl F.
Publisher: name: Zenodo
Year: 1993
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Chiroptera
Pteropodidae
Pteropus
Pteropus mahaganus

description: Pteropus mahaganus Sanborn, 1931. Field Mus. Nat. Hist. Pubi., Zool. Ser., 2:19. TYPE LOCALITY: Solomon Isis, Ysabel Isl, Tunnibul. DISTRIBUTION: Bougainville and Ysabel Isis (Solomon Isis). STATUS: CITES - Appendix II.
description: Published as part of Karl F. Koopman, 1993, Order Chiroptera, pp. 137-241 in Mammal Species of the World (2 nd Edition), Washington and London :Smithsonian Institution Press on page 148, DOI: 10.5281/zenodo.7353060
Sensitivity Kernels for Flows in Time-Distance Helioseismology: Extension to Spherical Geometry
Creators: name: Böning, Vincent G. A.
name: Roth, Markus
name: Zima, Wolfgang
name: Birch, Aaron C.
name: Gizon, Laurent
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We extend an existing Born approximation method for calculating the linear sensitivity of helioseismic travel times to flows from Cartesian to spherical geometry. This development is necessary for using the Born approximation for inferring large-scale flows in the deep solar interior. In a first sanity check, we compare two $f-$mode kernels from our spherical method and from an existing Cartesian method. The horizontal and total integrals agree to within 0.3 %. As a second consistency test, we consider a uniformly rotating Sun and a travel distance of 42 degrees. The analytical travel-time difference agrees with the forward-modelled travel-time difference to within 2 %. In addition, we evaluate the impact of different choices of filter functions on the kernels for a meridional travel distance of 42 degrees. For all filters, the sensitivity is found to be distributed over a large fraction of the convection zone. We show that the kernels depend on the filter function employed in the data analysis process. If modes of higher harmonic degree ($90\lesssim l \lesssim 170$) are permitted, a noisy pattern of a spatial scale corresponding to $l\approx 260$ appears near the surface. When mainly low-degree modes are used ($l\lesssim70$), the sensitivity is concentrated in the deepest regions and it visually resembles a ray-path-like structure. Among the different low-degree filters used, we find the kernel for phase-speed filtered measurements to be best localized in depth.
description: 17 pages, 5 figures, 2 tables, accepted for publication in ApJ. v2: typo in arXiv author list corrected
Evaluation of Backsheet Endurance by [UV-Water Cooking Test] and Module Reliability by [TC-HF-UV-DH] Sequential Test
Creators: name: Chang, M.
name: Chen, H.
name: Chen, C.
name: Hsueh, C.H.
name: Hsieh, W.J.
Publisher: name: WIP
Year: 2015
Subjects: OPERATIONS, PERFORMANCE AND RELIABILITY OF PHOTOVOLTAICS (FROM CELLS TO SYSTEMS)
PV Modules

description: 31st European Photovoltaic Solar Energy Conference and Exhibition; 2473-2477
description: Combining UV and water cooking test [UV-WCT] is applied to evaluate three types of backsheet
structure against UV, thermal and humidity stress. Appearance, yellowing effect, water vapor transmission rate
(WVTR) and FT-IR spectral are inspected. Layer to layer de-lamination and PET hydrolysis take place after
combining of 300 KWhr/m2 UV irradiation and 400 hour cooking test. Module-level [TC-HF-UV(backside)-
UV(glass-side)-DH-UV(glass-side)] sequential test with those backsheets is performed to investigate the PV module
reliability, and both backsheet side and glass side are radiated by UV in the test sequence. The backsheet level result
shows excellent correlation to module level test result for simulating the failure mode in the field.
Design and Contribution of a New Dual-Axis Solar Tracking System with a Fisheye Camera
Creators: name: El Jaouhari, Z.
name: Moughyt, S.
name: El Kadmiri, O.
name: Masmoudi, L.
name: El Kadmiri, Z.
name: Zaz, Y.
Publisher: name: WIP
Year: 2015
Subjects: OPERATIONS, PERFORMANCE AND RELIABILITY OF PHOTOVOLTAICS (FROM CELLS TO SYSTEMS)
Balance of System Components

description: 31st European Photovoltaic Solar Energy Conference and Exhibition; 2416-2419
description: The daily and seasonal movements of earth affects the power generation of photovoltaic solar systems. The aim of
using sun-tracking systems is to optimize the orientation of solar panels to compensate the power lose, maintaining the best
orientation relative to the sun irradiation. In this paper, we present a new design of dual-axis solar tracker. This tracker is based
on the use of computer vision techniques to acquire the accurate orientation towards the sun. The main advantage of proposed
design is that it uses a fisheye camera as an acquisition module. The fisheye camera offers a wide field of tracking of 360 degrees
horizontally, and 180 degrees vertically, with no blind zones. The processing of the acquired images provides exact information
about the sun spectrum position in spherical coordinates. This tracker does not need any initial calibrations since the tracking
process is done independently of the geodetic and temporal coordinates of the site. An analysis study explains the proposed
tracking strategy and the relative advantages of such design.
Pteropus mariannus Desmarest 1822
Creators: name: Koopman, Karl F.
Publisher: name: Zenodo
Year: 1993
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Chiroptera
Pteropodidae
Pteropus
Pteropus mariannus

description: Pteropus mariannus Desmarest, 1822. Mammalogie, in Encycl. Méth., 2(Suppl.):547. TYPE LOCALITY: Marianna Isis, Guam (USA). DISTRIBUTION: Mariana Isis and Caroline Isis (including Palau Isis), Ryukyu Isis (Japan). STATUS: CITES - Appendix I; U.S. ESA - Endangered in Guam as P. m. mariannus; IUCN - Endangered. SYNONYMS: keraudren, loochooensis, paganensis, pelewensis, ualanus, ulthiensis, vanikorensis, yapensis. COMMENTS: Includes loochooensis, pelewensis, ualanus, and yapensis; see Kuroda (1938). Corbet and Hill (1980:37-38) listed these forms as distinct species without comment; but see Yoshiyuki (1989), who treated loochooensis as a separate species. Probably includes vanikorensis, see Troughton (1930).
description: Published as part of Karl F. Koopman, 1993, Order Chiroptera, pp. 137-241 in Mammal Species of the World (2 nd Edition), Washington and London :Smithsonian Institution Press on page 148, DOI: 10.5281/zenodo.7353060
description: {"references": ["Kuroda, N. 1938. A list of the Japanese mammals. Privately published, Tokyo, 122 pp.", "Corbet, G. B., and J. E. Hill. 1980. A world list of mammalian species. British Museum (Natural History), London, 226 pp.", "Troughton, E. L. G. 1930. A new species and subspecies of fruit-bats (Pteropus) from the Santa Cruz group. Records of the Australian Museum, 18: 1 - 4."]}
Vanishing Noether Current in Weyl Invariant Gravities
Creators: name: Oda, Ichiro
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We revisit the issue that the Noether current associated with a local scale symmtery, or equivalently the Weyl symmetry, identically vanishes. Based on only the second Noether theorem for a local symmetry, we prove that the Noether current associated with the Weyl symmetry is in general vanishing in any Weyl invariant gravitational theories in four dimensional Riemannian geometry. We also clarify the reason: The Weyl transformation is non-dynamical in the sense that it does not contain the derivative term of the transformation parameter as opposed to the conventional gauge transformation. Finally, we apply this result to a quantum theory of a general Weyl invariant gravity and derive currents associated with choral symmetry, which is the $IOSp(10|10)$ supersymmetry.
description: 12 pages
Laser fabrication of crystalline silicon nanoresonators from an amorphous film for low-loss all-dielectric nanophotonics
Creators: name: Dmitriev, P. A.
name: Makarov, S. V.
name: Milichko, V. A.
name: Mukhin, I. S.
name: Gudovskikh, A. S.
name: Sitnikova, A. A.
name: Samusev, A. K.
name: Krasnok, A. E.
name: Belov, P. A.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The concept of high refractive index subwavelength dielectric nanoresonators, supporting electric and magnetic optical resonances, is a promising platform for waveguiding, sensing, and nonlinear nanophotonic devices. However, high concentration of defects in the nanoresonators diminishes their resonant properties, which are crucially dependent on their internal losses. Therefore, it seems to be inevitable to use initially crystalline materials for fabrication of the nanoresonators. Here, we show that the fabrication of crystalline (low-loss) resonant silicon nanoparticles by femtosecond laser ablation of amorphous (high-loss) silicon thin films is possible. We apply two conceptually different approaches: recently proposed laser-induced transfer and a novel laser writing technique for large-scale fabrication of the crystalline nanoparticles. The crystallinity of the fabricated nanoparticles is proven by Raman spectroscopy and electron transmission microscopy, whereas optical resonant properties of the nanoparticles are studied using dark-field optical spectroscopy and full-wave electromagnetic simulations.
description: Published in Nanoscale
Stability of non-topological string in supersymmetric $SU(2)\times U(1)$ gauge theory
Creators: name: Kanda, Yukihiro
name: Maekawa, Nobuhiro
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We construct a non-topological string solution for a supersymmetric gauge theory with $SU(2)\times U(1)$ gauge symmetry which is spontaneously broken to $U(1)$ by developing the vacuum expectation value of two doublet Higgses. It is a supersymmetric extension of the electroweak string while supersymmetry is unbroken. We discuss the classical stability of the non-topological string by perturbations. We show that the classical stability are determined only by two parameters, and that the allowed region becomes essentially the same as in the electroweak string.
description: 18 pages
Low-Frequency Noise Quality Testing of Silicon Concentrator Photovoltaic Cell with Very High Efficiency
Creators: name: Chobola, Z.
name: Luňnak, M.
name: Vanek, J.
name: Dolensky, J.
name: Barinka, R.
Publisher: name: WIP
Year: 2015
Subjects: OPERATIONS, PERFORMANCE AND RELIABILITY OF PHOTOVOLTAICS (FROM CELLS TO SYSTEMS)
Quality and Sustainability in Manufacturing and Recycling

description: 31st European Photovoltaic Solar Energy Conference and Exhibition; 2457-2460
description: This paper deals with comparisons of noise spectroscopy and I-V characteristic of silicon concentrator
photovoltaic (CPV) cell with very high efficiency. Efficiency reaches to 38%. We studied two groups with different
technologies (A and B). Each group had 6 samples. The samples were quality screened using noise analysis. From
the measurement results it follows that the noise spectral density related to defects is of 1/f or generationrecombination
types. G-r noise and burst noise is not fundamental noise and therefore can by use as quality indicator.
For the determination of a possible noise source there was used the microplasma detection method and ESEM
displaying.
Lightweight LCP Construction for Very Large Collections of Strings
Creators: name: Cox, Anthony J.
name: Garofalo, Fabio
name: Rosone, Giovanna
name: Sciortino, Marinella
Publisher: name: arXiv
Year: 2016
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Computer and information sciences

description: The longest common prefix array is a very advantageous data structure that, combined with the suffix array and the Burrows-Wheeler transform, allows to efficiently compute some combinatorial properties of a string useful in several applications, especially in biological contexts. Nowadays, the input data for many problems are big collections of strings, for instance the data coming from "next-generation" DNA sequencing (NGS) technologies. In this paper we present the first lightweight algorithm (called extLCP) for the simultaneous computation of the longest common prefix array and the Burrows-Wheeler transform of a very large collection of strings having any length. The computation is realized by performing disk data accesses only via sequential scans, and the total disk space usage never needs more than twice the output size, excluding the disk space required for the input. Moreover, extLCP allows to compute also the suffix array of the strings of the collection, without any other further data structure is needed. Finally, we test our algorithm on real data and compare our results with another tool capable to work in external memory on large collections of strings.
description: This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ The final version of this manuscript is in press in Journal of Discrete Algorithms
What is the fate of Hawking evaporation in gravity theories with higher curvature terms?
Creators: name: Corelli, Fabrizio
name: De Amicis, Marina
name: Ikeda, Taishi
name: Pani, Paolo
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: During the final stages of black hole evaporation, ultraviolet deviations from General Relativity eventually become dramatic, potentially affecting the end-state. We explore this problem by performing nonlinear simulations of wave packets in Einstein-dilaton-Gauss-Bonnet gravity, the only gravity theory with quadratic curvature terms which can be studied at fully nonperturbative level. Black holes in this theory have a minimum mass but also a nonvanishing temperature. This poses a puzzle concerning the final fate of Hawking evaporation in the presence of high-curvature nonperturbative effects. By simulating the mass loss induced by evaporation at the classical level using an auxiliary phantom field, we study the nonlinear evolution of black holes past the minimum mass. We observe a runaway shrink of the horizon (a nonperturbative effect forbidden in General Relativity) which eventually unveils a high-curvature elliptic region. While this might hint to the formation of a naked singularity (and hence to a violation of the weak cosmic censorship) or of a pathological spacetime region, a different numerical formulation of the initial-value problem in this theory might be required to rule out other possibilities, including the transition from the critical black hole to a stable horizonless remnant. Our study is relevant in the context of the information-loss paradox, dark-matter remnants, and for constraints on microscopic primordial black holes.
description: 6 pages, 3 figures. v2: extended discussion and clarification. Results and conclusions unchanged. v3: minor changes to match version to appear in PRL. Companion paper available at arXiv:2205.13007
The effect of Compton drag on the dynamics of dissipative Poynting dominated flows: Implications for the unification of radio loud AGN
Creators: name: Levinson, Amir
name: Globus, Noemie
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The dynamics of a dissipative Poynting dominated flow subject to a radiation drag due to Compton scattering of ambient photons by relativistic electrons accelerated in reconnecting current sheets is studied. It is found that the efficiency at which magnetic energy is converted to radiation is limited to a maximum value of $ε_c=3l_{dis}\,σ_0/4(σ_0+1)$, where $σ_0$ is the initial magnetization of the flow and $l_{dis}\le1$ the fraction of initial Poynting flux that can dissipate. The asymptotic Lorentz factor satisfies $Γ_\infty\geΓ_0(1+l_{dis}\,σ_0/4)$, where $Γ_0$ is the initial Lorentz factor. This limit is approached in cases where the cooling time is shorter than the local dissipation time. A somewhat smaller radiative efficiency is expected if radiative losses are dominated by synchrotron and SSC emissions. It is suggested that under certain conditions magnetic field dissipation may occur in two distinct phases: On small scales, asymmetric magnetic fields that are advected into the polar region and dragged out by the outflow dissipate to a more stable configuration. The dissipated energy is released predominantly as gamma rays. On much larger scales, the outflow encounters a flat density profile medium and re-collimates. This leads to further dissipation and wobbling of the jet head by the kink instability, as found recently in 3D MHD simulations. Within the framework of a model proposed recently to explain the dichotomy of radio loud AGN, this scenario can account for the unification of gamma-ray blazars with FRI and FRII radio sources.
description: 6 pages, 3 figures, submitted to MNRAS
Pteropus mearnsi Hollister 1913
Creators: name: Koopman, Karl F.
Publisher: name: Zenodo
Year: 1993
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Chiroptera
Pteropodidae
Pteropus
Pteropus mearnsi

description: Pteropus mearnsi Hollister, 1913. Proc. Biol. Soc. Washington, 26:112. TYPE LOCALITY: Philippines, Basilan Isl, Isabella. DISTRIBUTION: Mindanao and Basilan Isl (Philippines). STATUS: CITES - Appendix II. COMMENTS: Probably a synonym of P. speciosus; see Heaney et al. (1987).
description: Published as part of Karl F. Koopman, 1993, Order Chiroptera, pp. 137-241 in Mammal Species of the World (2 nd Edition), Washington and London :Smithsonian Institution Press on page 148, DOI: 10.5281/zenodo.7353060
description: {"references": ["Heaney, L. R., P. C. Gonzales, and A. C. Acala. 1987. An annotated checklist of the taxonomic and conservation status of land mammals in the Philippines. Silliman Journal, 34: 32 - 66."]}
Nematic Colloidal Swarms Assembled and Transported on Photosensitive Surfaces
Creators: name: Hernàndez-Navarro, Sergi
name: Tierno, Pietro
name: Ignés-Mullol, Jordi
name: Sagués, Francesc
Publisher: name: arXiv
Year: 2016
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We demonstrate a novel method to assemble and transport swarms of colloidal particles by combining liquid crystals enabled electrophoresis and photo-sensitive surface patterning. Colloidal particles are propelled in a nematic liquid crystal via application of an alternating current electric field. Swarms of particles are assembled into a rotating mill cluster, or moved as a whole along predefined paths photo-imprinted on chemically functionalized substrates. This technique represents an alternative approach to fluid based lab-on-a-chip technologies guiding the motion of large ensembles of micrometer scale solid or liquid inclusions.
A Comprehensive Protocol for Assessing the Quality of the Lamination Process of Thin Film Glass/Glass Modules
Creators: name: Virtuani, A.
name: Manni, L.
name: Pic, D.
name: Allary, J.-L.
name: Saucedo, E.
Publisher: name: WIP
Year: 2015
Subjects: OPERATIONS, PERFORMANCE AND RELIABILITY OF PHOTOVOLTAICS (FROM CELLS TO SYSTEMS)
Quality and Sustainability in Manufacturing and Recycling

description: 31st European Photovoltaic Solar Energy Conference and Exhibition; 2444-2448
description: In this work, we present a comprehensive protocol for the assessment of the quality of the
lamination/encapsulation process of CIGSS thin film glass/glass solar PV modules. The quality protocol includes: (1)
a polymerization test, (2) optical characterization (3) a mechanical adhesion test, and (4) and climatic stresses (dampheat
DH). In this contribution we apply the quality protocol to a set of lamination trials performed with EVA (with
and without the presence of an edge-sealant) and with modifications to the standard curing recipe (i.e. shorter curing
time, lower curing temperature). The execution of DH tests on the prototypes laminated with EVA shows that the
durability to moisture ingress for the device laminated with EVA and no sealant is guaranteed up to 1000 h (enough
to pass a conventional IEC 61646 test), but is followed by a severe degradation after prolonged exposures in DH. All
devices laminated with EVA and the addition of an edge sealant exhibited an excellent resistance to exposure in DH
also for prolonged periods up to 5538 h. By combining the different outcomes of the protocol for quality and
considering the different lamination processes, we conclude that a reduction of curing time from 11 to 7 min (at
constant temperature: 145°C), apparently has nearly no effect on the quality of the lamination process. On the other
hand, the low temperature process (120°C, 11 min) has a strongly reduced gel content, which consequently reduces
the adhesion strength of the device. The low temperature process should be avoided.
Nonperturbative gedanken experiments in Einstein-dilaton-Gauss-Bonnet gravity: nonlinear transitions and tests of the cosmic censorship beyond General Relativity
Creators: name: Corelli, Fabrizio
name: De Amicis, Marina
name: Ikeda, Taishi
name: Pani, Paolo
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: As the only gravity theory with quadratic curvature terms and second-order field equations, Einstein-dilaton-Gauss-Bonnet gravity is a natural testbed to probe the high-curvature regime beyond General Relativity in a fully nonperturbative way. Due to nonperturbative effects of the dilatonic coupling, black holes in this theory have a minimum mass which separates a stable branch from an unstable one. The minimum mass solution is a double point in the phase diagram of the theory, wherein the critical black hole and a wormhole solution coexist. We perform extensive nonlinear simulations of the spherical collapse onto black holes with scalar hair in this theory, especially focusing on the region near the minimum mass. We study the nonlinear transition from the unstable to the stable branch and assess the nonlinear stability of the latter. Furthermore, motivated by modeling the mass loss induced by Hawking radiation near the minimum mass at the classical level, we study the collapse of a phantom field onto the black hole. When the black-hole mass decreases past the critical value, the apparent horizon shrinks significantly, eventually unveiling a high-curvature elliptic region. We argue that evaporation in this theory is bound to either violate the weak cosmic censorship or produce horizonless remnants. Addressing the end-state might require a different evolution scheme.
description: 27 pages, 23 figures, companion paper of arXiv:2205.13006 [gr-qc] . v2: added references and comparison between event horizon and apparent horizon. v3: extended discussion with new simulations of a pair of positive- and negative- energy wave packets to mimic the Hawking quantum pair. Results and conclusions unchanged. v4: minor changes to match version to appear in PRD
H2 distribution during 2-phase Molecular Cloud Formation
Creators: name: Valdivia, V.
name: Hennebelle, P.
name: Gerin, M.
name: Lesaffre, P.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We performed high-resolution, 3D MHD simulations and we compared to observations of translucent molecular clouds. We show that the observed populations of rotational levels of H2 can arise as a consequence of the multi-phase structure of the ISM.
description: 2 pages, 1 figure. Due to appear in the proceedings of the 6th Zermatt ISM Symposium: "Conditions and Impact of Star Formation: From Lab to Space"
SwinVRNN: A Data-Driven Ensemble Forecasting Model via Learned Distribution Perturbation
Creators: name: Hu, Yuan
name: Chen, Lei
name: Wang, Zhibin
name: Li, Hao
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Data-driven approaches for medium-range weather forecasting are recently shown extraordinarily promising for ensemble forecasting for their fast inference speed compared to traditional numerical weather prediction (NWP) models, but their forecast accuracy can hardly match the state-of-the-art operational ECMWF Integrated Forecasting System (IFS) model. Previous data-driven attempts achieve ensemble forecast using some simple perturbation methods, like initial condition perturbation and Monte Carlo dropout. However, they mostly suffer unsatisfactory ensemble performance, which is arguably attributed to the sub-optimal ways of applying perturbation. We propose a Swin Transformer-based Variational Recurrent Neural Network (SwinVRNN), which is a stochastic weather forecasting model combining a SwinRNN predictor with a perturbation module. SwinRNN is designed as a Swin Transformer-based recurrent neural network, which predicts future states deterministically. Furthermore, to model the stochasticity in prediction, we design a perturbation module following the Variational Auto-Encoder paradigm to learn multivariate Gaussian distributions of a time-variant stochastic latent variable from data. Ensemble forecasting can be easily achieved by perturbing the model features leveraging noise sampled from the learned distribution. We also compare four categories of perturbation methods for ensemble forecasting, i.e. fixed distribution perturbation, learned distribution perturbation, MC dropout, and multi model ensemble. Comparisons on WeatherBench dataset show the learned distribution perturbation method using our SwinVRNN model achieves superior forecast accuracy and reasonable ensemble spread due to joint optimization of the two targets. More notably, SwinVRNN surpasses operational IFS on surface variables of 2-m temperature and 6-hourly total precipitation at all lead times up to five days.
Pteropus melanopogon Peters 1867
Creators: name: Koopman, Karl F.
Publisher: name: Zenodo
Year: 1993
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Chiroptera
Pteropodidae
Pteropus
Pteropus melanopogon

description: Pteropus melanopogon Peters, 1867. Monatsb. K. Preuss. Akad. Wiss. Berlin, 1867:330. TYPE LOCALITY: Indonesia, Molucca Isis, Amboina. DISTRIBUTION: Aru Isis, Kei Isis, Amboina, Buru, Seram, Banda Isis, Timor Laut, and adjacent islands (Indonesia). A Sangihe Isl record is erroneous; see Bergmans and Rozendaal (1988:65). STATUS: CITES - Appendix II. SYNONYMS: aruensis, chrysargyrus, fumigatus, keyensis, rubiginosus. COMMENTS: Does not include sepikensis; see Koopman (1979:5). See comment under neohibernicus.
description: Published as part of Karl F. Koopman, 1993, Order Chiroptera, pp. 137-241 in Mammal Species of the World (2 nd Edition), Washington and London :Smithsonian Institution Press on pages 148-149, DOI: 10.5281/zenodo.7353060
description: {"references": ["Bergmans, W., and F. G. Rozendaal. 1988. Notes on collections of fruit bats from Sulawesi and some off-lying Islands (Mammalia; Megachiroptera). Zoologische Verhandelingen (Leiden), 248: 1 - 74.", "Koopman, K. F. 1979. Zoogeography of mammals from islands off the northeastern coast of New Guinea. American Museum Novitates, 2690: 1 - 17."]}
Reinforcement Learning for Branch-and-Bound Optimisation using Retrospective Trajectories
Creators: name: Parsonson, Christopher W. F.
name: Laterre, Alexandre
name: Barrett, Thomas D.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Combinatorial optimisation problems framed as mixed integer linear programmes (MILPs) are ubiquitous across a range of real-world applications. The canonical branch-and-bound algorithm seeks to exactly solve MILPs by constructing a search tree of increasingly constrained sub-problems. In practice, its solving time performance is dependent on heuristics, such as the choice of the next variable to constrain ('branching'). Recently, machine learning (ML) has emerged as a promising paradigm for branching. However, prior works have struggled to apply reinforcement learning (RL), citing sparse rewards, difficult exploration, and partial observability as significant challenges. Instead, leading ML methodologies resort to approximating high quality handcrafted heuristics with imitation learning (IL), which precludes the discovery of novel policies and requires expensive data labelling. In this work, we propose retro branching; a simple yet effective approach to RL for branching. By retrospectively deconstructing the search tree into multiple paths each contained within a sub-tree, we enable the agent to learn from shorter trajectories with more predictable next states. In experiments on four combinatorial tasks, our approach enables learning-to-branch without any expert guidance or pre-training. We outperform the current state-of-the-art RL branching algorithm by 3-5x and come within 20% of the best IL method's performance on MILPs with 500 constraints and 1000 variables, with ablations verifying that our retrospectively constructed trajectories are essential to achieving these results.
description: Accepted to AAAI'23: Proceedings of the Thirty-Seventh AAAI Conference on Artificial Intelligence
In-Line Quality Control Device for the Degree of Crosslinking of the Embedding Material Ethylene Vinyl Acetate in PV Modules
Creators: name: Hirschl, C.
name: Neumaier, L.
name: Mühleisen, W.
name: DeBiasio, M.
name: Leitner, R.
name: Zauner, M.
name: Oreski, G.
name: Rauschenbach, A.
name: Eder, G.C.
name: Seufzer, S.
name: Berge, C.
name: Rüland, E.
name: Kraft, M.
Publisher: name: WIP
Year: 2015
Subjects: OPERATIONS, PERFORMANCE AND RELIABILITY OF PHOTOVOLTAICS (FROM CELLS TO SYSTEMS)
Quality and Sustainability in Manufacturing and Recycling

description: 31st European Photovoltaic Solar Energy Conference and Exhibition; 2430-2434
description: Raman spectroscopy is proposed as a fully versatile, industrially applicable in-line quality control
method for measuring the degree of curing of elastomeric ethylene vinyl acetate (EVA). As a purely optical method,
Raman spectroscopy enables a contact-free, non-destructive analysis e.g. through the front glass. The characteristic
Raman spectra of differently crosslinked EVA show subtle but characteristic spectral differences in the CH-stretching
vibration region (3.000 – 2.800 cm-1) that correlates unambiguously and reliably to the state of encapsulant crosslinking.
An external calibration against standard Soxhlet extraction is still necessary, but only once for each material
type. In an initial proof-of-principle phase, various EVA samples were analysed with a Raman laboratory system,
both as bare EVA foils and in assembled glass-backsheet and glass-glass modules. Subsequently, an industrial Raman
demonstrator was designed, built and applied to the same samples. A detailed evaluation of the results proved good
analytical quality at analysis times down to 0.1 s per point. Finally, the device was installed and successfully operated
in a PV module manufacturing line. Raman spectroscopy has thus proven its capability for contact-free multi-point
real-time analysis of PV modules in-line in the manufacturing line.
Simulation and Wind Tunnel Testing of a Special Racking System for PV Modules on Flat Commercial Rooftops
Creators: name: Shu, Y.
name: Xu, J.
name: Zhang, Z.
name: Quan, P.
name: Fu, C.
name: Xue, X.
name: Zong, Y.
name: Yu, J.
name: Verlinden, P.J.
name: Feng, Z.
Publisher: name: WIP
Year: 2015
Subjects: OPERATIONS, PERFORMANCE AND RELIABILITY OF PHOTOVOLTAICS (FROM CELLS TO SYSTEMS)
Balance of System Components

description: 31st European Photovoltaic Solar Energy Conference and Exhibition; 2420-2423
description: Every year, more than 2.2GW of commercial photovoltaic (PV) systems are installed worldwide.
Approximately 30% of these are mounted on flat rooftops. PV systems that are mounted on flat rooftops have two special
requirements: they need to add as little weight as possible to the building and be exposed to as little wind load as possible.
The paper analyses the impact of wind on a new racking system developed for PV modules for flat rooftops.
Computational Fluid Dynamics (CFD) simulation was used to examine the impacts of wind loads on a rooftop mount
system. Wind tunnel testing was also carried out on a model representing this rooftop racking system to further verify the
results of the CFD simulation. Testing results indicate that the external section of the PV array will experience a greater
wind load compared to its internal section. Calculations performed using the drag coefficient of the Trinamount III D10
racking system demonstrates the advantages of this design under high wind loading. The light weight racking system
presents a tilt angle of 10 degrees and includes an optimized wind diffuser to protect the structure against high-wind
events. The attributes of robustness and light weight, coupled with its simplicity of installation and packaging make the
Trinamount III D10 racking system a fast installing, non-penetrative PV mounting system very well suited for
applications on flat rooftops.
Nonlinear charge transport in bipolar semiconductors due to electron heating
Creators: name: Molina-Valdovinos, S.
name: Gurevich, Yu. G.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: It is known that when strong electric field is applied to a semiconductor sample, the current voltage characteristic deviates from the linear response. In this letter, we propose a new point of view of nonlinearity in semiconductors which is associated with the electron temperature dependence on the recombination rate. The heating of the charge carriers breaks the balance between generation and recombination, giving rise to nonequilibrium charge carriers concentration and nonlinearity.
Anatomy of single-field inflationary models for primordial black holes
Creators: name: Karam, Alexandros
name: Koivunen, Niko
name: Tomberg, Eemeli
name: Vaskonen, Ville
name: Veermäe, Hardi
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We construct an analytically solvable simplified model that captures the essential features for primordial black hole (PBH) production in most models of single-field inflation. The construction makes use of the Wands duality between the constant-roll (or slow-roll) and the preceding ultra-slow-roll phases and can be realized by a simple inflaton potential of two joined parabolas. Within this framework, it is possible to formulate explicit inflationary scenarios consistent with the CMB observations and copious production of PBHs of arbitrary mass. We quantify the variability of the shape of the peak in the curvature power spectrum in different inflationary scenarios and discuss its implications for probing PBHs with scalar-induced gravitational wave backgrounds. We find that the COBE/Firas $μ$-distortion constraints exclude the production of PBHs heavier than $10^4 M_\odot$ in single-field inflation.
description: 47 pages, 10 figures, extended discussion, added references
Minimization of Electrical Losses of PV Modules Located in Places with High Solar Irradiance
Creators: name: Rabanal, J.
name: Schneider, A.
name: Cabrera, E.
name: Kopecek, R.
Publisher: name: WIP
Year: 2015
Subjects: OPERATIONS, PERFORMANCE AND RELIABILITY OF PHOTOVOLTAICS (FROM CELLS TO SYSTEMS)
Quality and Sustainability in Manufacturing and Recycling

description: 31st European Photovoltaic Solar Energy Conference and Exhibition; 2435-2438
description: In places where PV modules are most of the time exposed to solar irradiance larger than 1000 Wm-²
(like Egypt and Northern Chile), the current at MPP (maximum power point) is significantly higher than the current
measured at STC, which increases the electrical losses, especially for longer periods of exposure and has a
measurable effect on the NOCT (normal operating cell temperature) of the module. In order to reduce these losses a
conductive cell interconnection scheme or material with lower electrical resistance is required, meaning ribbons with
larger cross section, half cut solar cells or solar cells with more busbars than 3. In this paper it is shown how the
electrical losses of PV modules are affected by changing the ribbon cross-section, implementing multiple busbars or
cutting the cells by half, considering the operating temperature at several irradiance levels. A first approach shows the
3BB halved-cell is a suitable choice for desert conditions.
Revistas científicas registradas no DOAJ: análise a partir do Índice H5
Creators: name: Boas, Raphael Faria Vilas
name: Campos, Fhillipe de Freitas
name: Andrade, Denise Aparecida Freitas de
name: Canto, Fábio Lorensi do
Publisher: name: Zenodo
Year: 2023

description: Apresentação realizada na sessão "Comunicação III" da 14ª Conferência Lusófona de Ciência Aberta, Natal Brasil, de 18 a 21 de setembro de 2023.
The Evolution and Mass Dependence of Galaxy Cluster Pressure Profiles at 0.05 $\le z \le$ 0.60 and $4 \times 10^{14}$ M$_{\odot}$ $\le \textrm{M}_{500} \le 30 \times 10^{14}$ M$_{\odot}$
Creators: name: Sayers, Jack
name: Mantz, Adam B.
name: Rasia, Elena
name: Allen, Steven W.
name: Cui, Weiguang
name: Golwala, Sunil R.
name: Morris, R. Glenn
name: Wan, Jenny T.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We have combined X-ray observations from Chandra with Sunyaev-Zel'dovich (SZ) effect data from Planck and Bolocam to measure intra-cluster medium pressure profiles from 0.03R$_{500}$ $\le$ R $\le$ 5R$_{500}$ for a sample of 21 low-$z$ galaxy clusters with a median redshift $\langle z \rangle = 0.08$ and a median mass $\langle \textrm{M}_{500} \rangle = 6.1 \times 10^{14}$ M$_{\odot}$ and a sample of 19 mid-$z$ galaxy clusters with $\langle z \rangle = 0.50$ and $\langle \textrm{M}_{500} \rangle = 10.6 \times 10^{14}$ M$_{\odot}$. The mean scaled pressure in the low-$z$ sample is lower at small radii and higher at large radii, a trend that is accurately reproduced in similarly selected samples from The300 simulations. This difference appears to be primarily due to dynamical state at small radii, evolution at intermediate radii, and a combination of evolution and mass dependence at large radii. Furthermore, the overall flattening of the mean scaled pressure profile in the low-$z$ sample compared to the mid-$z$ sample is consistent with expectations due to differences in mass accretion rate and the fractional impact of feedback mechanisms. In agreement with previous studies, the fractional scatter about the mean scaled pressure profile reaches a minimum of $\simeq 20$ per cent near 0.5R$_{500}$. This scatter is consistent between the low-$z$ and mid-$z$ samples at all radii, suggesting it is not strongly impacted by sample selection, and this general behavior is reproduced in The300 simulations. Finally, analytic functions that approximately describe the mass and redshift trends in mean pressure profile shape are provided.
description: Accepted for publication in ApJ. Updated to closely match the published version
Polynomial Pickands functions
Creators: name: Guillotte, Simon
name: Perron, François
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics

description: Pickands dependence functions characterize bivariate extreme value copulas. In this paper, we study the class of polynomial Pickands functions. We provide a solution for the characterization of such polynomials of degree at most $m+2$, $m\geq0$, and show that these can be parameterized by a vector in $\mathbb{R}^{m+1}$ belonging to the intersection of two ellipsoids. We also study the class of Bernstein approximations of order $m+2$ of Pickands functions which are shown to be (polynomial) Pickands functions and parameterized by a vector in $\mathbb{R}^{m+1}$ belonging to a polytope. We give necessary and sufficient conditions for which a polynomial Pickands function is in fact a Bernstein approximation of some Pickands function. Approximation results of Pickands dependence functions by polynomials are given. Finally, inferential methodology is discussed and comparisons based on simulated data are provided.
description: Published at http://dx.doi.org/10.3150/14-BEJ656 in the Bernoulli (http://isi.cbs.nl/bernoulli/) by the International Statistical Institute/Bernoulli Society (http://isi.cbs.nl/BS/bshome.htm)
Self-screening corrections beyond the random-phase approximation: Applications to band gaps of semiconductors
Creators: name: Christiansson, Viktor
name: Aryasetiawan, Ferdi
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The self-screening error in the random-phase approximation (RPA) and the $GW$ approximation (GWA) is a well-known issue and has received attention in recent years with several methods for a correction being proposed. We here apply two of these, a self-screening and a so-called "self-polarization" correction scheme, to model calculations to examine their applicability. We also apply an explicit self-screening correction to \textit{ab-initio} calculations of real materials. We find indications for the self-polarization scheme to be the more appropriate choice of correction for localized states, and additionally we observe that it suffers from causality violations in the strongly correlated regime. The self-screening correction used in this work on the other hand significantly improves the description in more delocalized states. It provides a notable reduction in the remaining GWA error when calculating the band gaps of several semiconductors, indicating a physical explanation for a part of the remaining discrepancy in one-shot $GW$ compared to experiment, while leaving the localized semicore $d$ states mostly unaffected.