cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Lively quantum walks on cycles
Creators: name: Sadowski, Przemysław
name: Miszczak, Jarosław Adam
name: Ostaszewski, Mateusz
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantum Physics (quant-ph)
subject: Emerging Technologies (cs.ET)
subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: C.2.1; I.6.5
subject: 81P45, 94A05, 05C81

description: We introduce a family of quantum walks on cycles parametrized by their liveliness, defined by the ability to execute a long-range move. We investigate the behaviour of the probability distribution and time-averaged probability distribution. We show that the liveliness parameter, controlling the magnitude of the additional long-range move, has a direct impact on the periodicity of the limiting distribution. We also show that the introduced model provides a method for network exploration which is robust against trapping.
description: 13 pages
Cadmium Telluride Thin Film Photovoltaics for Space Application
Creators: name: Kimber, R.
name: Lamb, D.A.
name: Irvine, S.J.C.
name: Baker, M.A.
name: Grilli, R.
name: Underwood, C.I.
name: Hall, J.
Publisher: name: WIP
Year: 2014
Subjects: SOLAR CELLS / ASSEMBLIES / MODULES FOR TERRESTRIAL CONCENTRATOR SYSTEMS AND FOR SPACE SOLAR GENERATORS
III-V-based Multi-junction Solar Cells, Concentrator Solar Cells and Space Solar Cells

description: 29th European Photovoltaic Solar Energy Conference and Exhibition; 2066-2071
description: This paper will look at the novel development of an affordable thin film cell for space use that promises an alternative path to the higher cost III-V solar cell development. The finished product will be a thin film cell of CdTe applied to a toughened large area flexible space qualified coverglass (Qioptiq CMG), the first time that this has been attempted. An efficiency of at least 14% AM0 is expected to be achieved.
The programme has started with the successful application of the transparent conductive oxide to CMG glass. The work will then continue with the application of the cadmium telluride and the initial measurements of efficiency; further optimising the cell design and increasing the deposition area on the CMG glass; and then laser scribing the total area into series cells to produce higher voltage modules. In parallel with this the important environmental testing to meet the stringent conditions encountered in space will be undertaken.
Further work on the completion of the programme will be discussed. This will include an array level development that exploits the thin film cell properties. In parallel with this flight opportunities on microsat missions will also be discussed in order for the cell type to gain flight heritage.
Modeling Realistically Attainable Efficiency of Multijunction Solar Cells
Creators: name: Sachenko, A.V.
name: Kostylyov, V.P.
name: Kulish, M.R.
name: Sokolovskyi, I.O.
name: Shkrebtii / Chkrebtii, A.I.
name: Gaspari, F.
name: Quaranta, S.
Publisher: name: WIP
Year: 2014
Subjects: SOLAR CELLS / ASSEMBLIES / MODULES FOR TERRESTRIAL CONCENTRATOR SYSTEMS AND FOR SPACE SOLAR GENERATORS
Electrical Characterisation and Modeling of Cells and Modules

description: 29th European Photovoltaic Solar Energy Conference and Exhibition; 2076-2080
description: We offer a comprehensive semi-analytical formalism to model the photoconversion efficiency  for multijunction solar cells (MJSCs) and apply this under AM0 and AM1.5 conditions. We take into account dominating recombination mechanisms (such as radiative recombination, Shockley-Read-Hall (SRH) recombinations, and space charge region (SCR) recombination). In addition, heat dissipation, which depends on the number of p-n junctions (subcells) n, system emissivity, and losses related to low light absorption coefficient  near the band edge of each subcell are included in the formalism. The derived equations for photocurrent and photovoltage, combined with heat balance equation, were solved selfconsistently. Increasing n reduces thermalization losses and cools the MJSC down. The optimal doping level of MJSC subcells is found to be ~1017 cm-3. This is particularly important under AM0 conditions. Using large area radiators to improve the heat dissipation noticeably increases the efficiency . Our approach can be used to optimize MJSC for both terrestrial and space applications.
A superfluid boundary layer
Creators: name: Stagg, G. W.
name: Parker, N. G.
name: Barenghi, C. F.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We model the superfluid flow of liquid helium over the rough surface of a wire (used to experimentally generate turbulence) profiled by atomic force microscopy. Numerical simulations of the Gross-Pitaevskii equation reveal that the sharpest features in the surface induce vortex nucleation both intrinsically (due to the raised local fluid velocity) and extrinsically (providing pinning sites to vortex lines aligned with the flow). Vortex interactions and reconnections contribute to form a dense turbulent layer of vortices with a non-classical average velocity profile which continually sheds small vortex rings into the bulk. We characterise this layer for various imposed flows. As boundary layers conventionally arise from viscous forces, this result opens up new insight into the nature of superflows.
description: 7 pages, 5 figures
Return of Experience from 5 Years of Field Data: Long Term Performance Reliability of Soitec’s CPV Technology
Creators: name: Zech, T.
name: Gerstmaier, T.
name: Röttger, M.
name: Moretta, R.
name: Braun, C.
name: Gombert, A.
name: Steiner, M.
name: Siefer, G.
name: Sánchez, D.
name: De La Rubia, O.
name: Martínez, M.
Publisher: name: WIP
Year: 2014
Subjects: SOLAR CELLS / ASSEMBLIES / MODULES FOR TERRESTRIAL CONCENTRATOR SYSTEMS AND FOR SPACE SOLAR GENERATORS
Terrestrial Concentrator Modules and Systems

description: 29th European Photovoltaic Solar Energy Conference and Exhibition; 2017-2019
description: This paper examines the long term reliability of Soitec’s CPV technology by analyzing a total of 68 months of AC energy and Direct-Normal Irradiance data acquired at Puertollano, Spain. The reliability of the module performance is quantified using the AC Performance Ratio. The results are verified by repetitive indoor measurements of seven modules of this plant in intervals of one to one-and-a-half years since their installation in 2009.
High Efficiency Four Junction Lattice Matched Solar Cells for Space Applications: Analysis of Radiation Hardness Against 1 MeV Electrons
Creators: name: Campesato, R.
name: Gori, G.
name: Casale, M.
name: Gabetta, G.
Publisher: name: WIP
Year: 2014
Subjects: SOLAR CELLS / ASSEMBLIES / MODULES FOR TERRESTRIAL CONCENTRATOR SYSTEMS AND FOR SPACE SOLAR GENERATORS
Solar Generators for Space Missions

description: 29th European Photovoltaic Solar Energy Conference and Exhibition; 2031-2035
description: InGaP/InGaAs/Ge triple junction solar cells have reached efficiencies above 30% in A.M. 0 conditions. To further improve their conversion efficiency, many solutions have been proposed, mainly involving an increase of the number of junctions by a combination of semiconductors with different band-gaps. CESI is investigating a lattice matched structure, that can be grown entirely by MOCVD, composed by the following sub cells: (AlxGa1-x)0.51In0.49P (0.10
Torsion, torsion length and finitely presented groups
Creators: name: Chiodo, Maurice
name: Vyas, Rishi
Publisher: name: arXiv
Year: 2016
Subjects: subject: Group Theory (math.GR)
subject: Logic (math.LO)
subject: FOS: Mathematics
subject: 20E06, 20F05, 20F06, 20F10, 20F65

description: We show that a construction by Aanderaa and Cohen used in their proof of the Higman Embedding Theorem preserves torsion length. We give a new construction showing that every finitely presented group is the quotient of some $C'(1/6)$ finitely presented group by the subgroup generated by its torsion elements. We use these results to show there is a finitely presented group with infinite torsion length which is $C'(1/6)$, and thus word-hyperbolic and virtually torsion-free.
description: 17 pages, version submitted for publication. This version: new title, expanded introduction, new section on torsion in word-hyperbolic groups, minor improvements
Chiral Magnetic Effect due to Inhomogeneous Magnetic Fields in Noncentrosymmetric Weyl Semimetals
Creators: name: Ibe, Yohei
name: Sumiyoshi, Hiroaki
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The chiral magnetic effect is a phenomenon where an electromagnetic current is generated along a magnetic field. Recently, in nonequilibrium systems, negative longitudinal magnetoresistance has been observed experimentally in Dirac/Weyl semimetals, which provides evidence for the chiral magnetic effect as a nonequilibrium current. On the other hand, the emergence of the chiral magnetic effect as an equilibrium current is still controversial. We propose a possible realization of the chiral magnetic effect as an equilibrium current using inhomogeneous magnetic fields. By employing tight-binding calculations and linear response theory, we demonstrate that a finite current density is generated by inhomogeneous magnetic fields, while the spatial integration of the current is equal to zero, which is consistent with the so-called "no-go theorem" of the chiral magnetic effect in real lattice systems. Moreover, we propose an experimental setup to detect the effect in Weyl semimetal materials.
description: 6 pages, 7 figures
Comparative Analysis of Nonuniform Illumination and Chromatic Aberration in Triple and Quadruple Junction Solar Cells under Concentration Using SPICE
Creators: name: Sharma, P.
name: Trojnar, A.H.
name: Wilkins, M.
name: Walker, A.W.
name: Schriemer, H.
name: Hinzer, K.
Publisher: name: WIP
Year: 2014
Subjects: SOLAR CELLS / ASSEMBLIES / MODULES FOR TERRESTRIAL CONCENTRATOR SYSTEMS AND FOR SPACE SOLAR GENERATORS
Terrestrial Concentrator Modules and Systems

description: 29th European Photovoltaic Solar Energy Conference and Exhibition; 2020-2024
description: The optics of a concentrating photovoltaic (CPV) system typically provides nonuniform illumination on the subcells, affecting current profiles and consequently system efficiency. Using a two-dimensional, distributed resistance model, we estimate the impact of nonuniform illumination and chromatic aberration for an inverted metamorphic, triple junction solar cell (3J IMM) and a lattice-matched, four junction solar cell (4J LM). Both the multijunction cells have an optimized efficiency of 42.4% at 1000 suns under uniform illumination. The performance of the 3J IMM and the 4J LM is analysed at different peak-to-average irradiance ratios (PAR). The 3J IMM shows a higher sensitivity to nonuniform illumination and a loss in efficiency of 5.4% absolute at a PAR = 5.3 while the losses in a 4J LM account for 3.7% absolute efficiency reduction. To model the effects of concentrating optics, an optical train with an idealized Fresnel lens and a secondary truncated pyramid homogenizer is simulated using commercial ray tracing software using the AM1.5D spectrum. Losses due to concentrating optics, nonuniform irradiance profiles and chromatic aberrations are determined for both cells at various primary to secondary working distances. At a working distance optimal for the 4J LM, the neglect of chromatic aberration is found to overstate the CPV system efficiency by 1.4% absolute and at the optimal working distance for 3J IMM, neglecting chromatic aberration overstates the system efficiency by 2%.
Ballistic Transport for Limit-Periodic Jacobi Matrices with Applications to Quantum Many-Body Problems
Creators: name: Fillman, Jake
Publisher: name: arXiv
Year: 2016
Subjects: subject: Spectral Theory (math.SP)
subject: Mathematical Physics (math-ph)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We study Jacobi matrices that are uniformly approximated by periodic operators. We show that if the rate of approximation is sufficiently rapid, then the associated quantum dynamics are ballistic in a rather strong sense; namely, the (normalized) Heisenberg evolution of the position operator converges strongly to a self-adjoint operator that is injective on the space of absolutely summable sequences. In particular, this means that all transport exponents corresponding to well-localized initial states are equal to one. Our result may be applied to a class of quantum many-body problems. Specifically, we establish a lower bound on the Lieb--Robinson velocity for an isotropic XY spin chain on the integers with limit-periodic couplings.
description: 20 pages
GaAsP Top Solar Cell of Three-Terminal GaAsP/SiGe on Si Tandem Solar Cells
Creators: name: Wang, L.
name: Diaz, M.
name: Conrad, B.
name: Lochtefeld, A.
name: Gerger, A.
name: Ebert, C.
name: Zhao, X.
name: Li, D.
name: Soeriyadi, A.
name: Perez-Wurfl, I.
name: Barnett, A.
Publisher: name: WIP
Year: 2014
Subjects: SOLAR CELLS / ASSEMBLIES / MODULES FOR TERRESTRIAL CONCENTRATOR SYSTEMS AND FOR SPACE SOLAR GENERATORS
III-V-based Multi-junction Solar Cells, Concentrator Solar Cells and Space Solar Cells

description: 29th European Photovoltaic Solar Energy Conference and Exhibition; 2043-2045
description: Integrating a high voltage solar cell on a crystalline silicon solar cell can lead to a 40% increase in efficiency for a silicon-based solar cell. GaAsP with its wide band gap and good diode performance is an excellent top cell candidate on this silicon-based tandem solar cell. A SiGe buffer grown between GaAsP and Si leads to latticematching. SiGe can also be designed as a bottom cell to increase power output. This 3-terminal approach splits the stack into two cells and facilitates individual analysis by adding middle metal contacts between top GaAsP and bottom SiGe solar cells. This paper describes design, fabrication and improvement of a GaAsP top cell in this 3-terminal GaAsP/SiGe tandem solar cell on silicon. Initial efficiency of GaAsP top cell with AR coating has achieved 18.4%. Bandgap-voltage offset under open circuit condition (Woc) achieved 0.48V. With improved optics and fill factor, the efficiency of this GaAsP top cell is expected to be more than 22%.
title: « Non à l’aéroport et à son monde » : Etude de la mobilisation en ligne des opposants au projet d’aéroport de Notre Dame des Landes
Creators: name: Mabi, Clément
Publisher: name: Cahiers Costech
Year: 2017
Subjects: Démocratie
Société de l'information

description: Dans cet article, je tenterai de montrer qu’Internet et les réseaux sociaux forment une nouvelle arène qui permet aux contre-publics de donner de la visibilité à des aspects du discours sous-représentés dans les médias dominants. Ce phénomène s’inscrirait dans un « processus d’apparition », identifié par Hannah Arendt (1961), dans la mesure où le pluralisme des discours autorisé par les arènes numériques permet à certains acteurs dominés d’exister auprès de leurs publics en rendant visibles et audibles leurs arguments. Le web serait susceptible de transformer les hiérarchies symboliques et « l’ordre du visible » produits par les médias de masse traditionnels (Voirol, 2005). Ainsi, je souhaite montrer que la mobilisation de ces arènes permet à certains acteurs de modifier la trajectoire de la controverse, de proposer une « bifurcation » pour conférer une légitimité nouvelle à certains arguments. Ces questionnements seront explorés à travers l’étude d’une controverse, celle qui entoure la construction de l’aéroport de Notre-Dame-des-Landes (NDDL). Je propose d’analyser comment les opposants mobilisent les « prédilections argumentatives » des outils de communication numériques pour parler de la lutte. Ce terrain sera étudié à travers la mobilisation de deux corpus : un corpus de presse sélectionné par la base Factiva autour du mot clé « Notre-Dame-des-Landes » et « aéroport du Grand Ouest » et un corpus de sites web et de blogs sélectionné manuellement autour des mêmes mots clés. L’analyse est complétée par une série d’entretiens avec des militants au sujet de leurs usages des médias numériques.
description: Ce texte est une version préliminaire, ici publiée en « Working Paper », pour mise en discussions et travail préparatoire à une communication proposée et acceptée pour le congrès annuel de l’Association Française de Science Politique, 2017, section thématique n°1 (ST01) « Controverses & jeu politique », Axe 4 « Mobilisations, solidarités et usages de la controverse » : http://www.afsp.info/congres/congres-2017/sessions/sections-thematiques/st1/
Further extensions of Clifford circuits and their classical simulation complexities
Creators: name: Koh, Dax Enshan
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantum Physics (quant-ph)
subject: Computational Complexity (cs.CC)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Extended Clifford circuits straddle the boundary between classical and quantum computational power. Whether such circuits are efficiently classically simulable seems to depend delicately on the ingredients of the circuits. While some combinations of ingredients lead to efficiently classically simulable circuits, other combinations, which might just be slightly different, lead to circuits which are likely not. We extend the results of Jozsa and Van den Nest [Quant. Info. Comput. 14, 633 (2014)] by studying two further extensions of Clifford circuits. First, we consider how the classical simulation complexity changes when we allow for more general measurements. Second, we investigate different notions of what it means to "classically simulate" a quantum circuit. These further extensions give us 24 new combinations of ingredients compared to Jozsa and Van den Nest, and we give a complete classification of their classical simulation complexities. Our results provide more examples where seemingly modest changes to the ingredients of Clifford circuits lead to "large" changes in the classical simulation complexities of the circuits, and also include new examples of extended Clifford circuits that exhibit "quantum supremacy", in the sense that it is not possible to efficiently classically sample from the output distributions of such circuits, unless the polynomial hierarchy collapses.
description: 19 pages, 3 figures
Next Generation of Wafer-Bonded Multi-Junction Solar Cells
Creators: name: Niemeyer, M.
name: Klinger, V.
name: Dimroth, F.
name: Predan, F.
name: Fuss-Kailuweit, P.
name: Reinwand, D.
name: Lackner, D.
name: Wekkeli, A.
name: Oliva, E.
name: Schachtner, M.
name: Siefer, G.
name: Bett, A.W.
Publisher: name: WIP
Year: 2014
Subjects: SOLAR CELLS / ASSEMBLIES / MODULES FOR TERRESTRIAL CONCENTRATOR SYSTEMS AND FOR SPACE SOLAR GENERATORS
III-V-based Multi-junction Solar Cells, Concentrator Solar Cells and Space Solar Cells

description: 29th European Photovoltaic Solar Energy Conference and Exhibition; 1991-1995
description: The highest conversion efficiencies are reached by multi-junction III-V solar cells. Wafer-bonding offers new possibilities to advance beyond the industrial standard triple-junction cells and its efficiency limitations. Here we present for the first time results of two novel 4-junction device concepts based on direct wafer-bonding with a realistic efficiency potential of 50% under concentrated sunlight. In the first concept, an inverted grown GaInP/GaAs tandem cell is bonded to a metamorphic GaInAs/Ge tandem cell. Frist bonded 4-junction solar cell on Ge shows an efficiency of 34.5% under one sun AM1.5d. In the latter concept a GaSb cell will be bonded to an inverted metamorphic triple-junction solar cell. The main challenge in this approach is a conductive direct wafer bond between the two cell stacks. Here, bond characteristics between GaSb and Ga0.29In0.71P and another between GaSb and Ga0.79In0.21As are shown for the first time.
Design of a Flexible Solar Generator for on-Orbit Verification on a Small Satellite Mission
Creators: name: Zajac, K.
name: Brunner, S.
name: Langendorf, S.
Publisher: name: WIP
Year: 2014
Subjects: SOLAR CELLS / ASSEMBLIES / MODULES FOR TERRESTRIAL CONCENTRATOR SYSTEMS AND FOR SPACE SOLAR GENERATORS
Solar Generators for Space Missions

description: 29th European Photovoltaic Solar Energy Conference and Exhibition; 2025-2030
description: Novel flexible, lightweight and highly efficient Cu(In,Ga)Se2 (CIGSe) thin film solar cells on polyimide (PI) foil substrate were the starting point for the development of a flexible solar generator. This makes it possible to revolutionize the whole concept of solar generators with their common used technology of using rigid solar cells and support structure. The presented solar generator consists of an aluminium support/stowage structure and a drum on which the CIGSe thin film solar cells are rolled up. The container like structure (220 mm x 104 mm x 105 mm) is closed by carbon-fibre-reinforced polymer (CFRP) panels and the drum is hold in position with a self developed hold down and release mechanism (HDRM) using a melting wire. When releasing the mechanism a flexible solar array of 128 mm x 344 mm will be self-deployed, without requiring any additional electric power. Once fully deployed the solar array is stiffened and self-locked.This paper presents a short overview of the baseline design requirements for a potential On-Orbit verification mission, the developed design for the planned OOV2 mission of the German Space Agency (DLR), results of the first verification tests and an outlook on a possible scalability.
Critical radius and temperature for buckling in graphene
Creators: name: Bonilla, L. L.
name: Ruiz-Garcia, M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In this work, we find an analytical flat-membrane solution to the saddle point equations, derived by Guinea et al. [Phys. Rev. B 89, 125428 (2014)], for the case of a suspended graphene membrane of circular shape. We also find how different buckled membrane solutions bifurcate from the flat membrane at critical temperatures and membrane radii. The saddle point equations take into account electron-phonon coupling and this coupling provides a residual stress even for a flat graphene layer. Below a critical temperature (which is exceedingly high for an infinite layer) or above a critical size that depend on boundary conditions, different buckling modes that may be the germ of rippling appear. Our results provide the opportunity to develop new feasible experiments dealing with buckling in small suspended graphene membranes that could verify them. These experiments may also be used to fit the phonon-electron coupling constant or the bending energy.
description: 21 pages, 2 figures
2D Photonic Crystals with Random Surface Roughness for Light Trapping in Thin Film Crystalline Silicon Photovoltaic Cells
Creators: name: Meng, X.
name: Drouard, E.
name: Gomard, G.
name: Frisina, D.
name: Kleiman, R.
name: Seassal, C.
Publisher: name: WIP
Year: 2014
Subjects: THIN FILM SOLAR CELLS
Silicon-based Thin Film Solar Cells

description: 29th European Photovoltaic Solar Energy Conference and Exhibition; 1944-1947
description: This work demonstrates the light trapping improvement in a mono-crystalline silicon thin film photovoltaic stack by introducing a multi-scale photonic structure patterned in a 1μm thick silicon layer. This pattern is composed of a two dimensional photonic crystals and a random surface roughness. Calculation results show that this combination leads to an integrated absorption increase of 14% when compared to an equivalent but perfectly smooth configuration. In order to fabricate such patterned stacks, an effective set of processes is developed based on laser holographic lithography, reactive ion etching and inductively coupled plasma etching. Optical measurements performed on the patterned stacks highlight the significant absorption increase achieved in the whole wavelength range of interest, as predicted by simulation.
Hairy Black Holes in AdS$_5\times S^5$
Creators: name: Markeviciute, Julija
name: Santos, Jorge E.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We use numerical methods to exhaustively study a novel family of hairy black hole solutions in AdS$_5$. These solutions can be uplifted to solutions of type IIB supergravity with AdS$_5\times S^5$ asymptotics and are thus expected to play an important role in our understanding of AdS/CFT. We find an intricate phase diagram, with the aforementioned family of hairy black hole solutions branching from the Reissner-Nordström black hole at the onset of the superradiance instability. We analyse black holes with spherical and planar horizon topology and explain how they connect in the phase diagram. Finally, we detail their global and local thermodynamic stability across several ensembles.
description: 27 pages, 40 figures
DATASET: Impact of solar-powered irrigation among vegetable producers in Mali
Creators: name: Rodrigue S. Kaki, Rosaine N. Yegbemey
Publisher: name: Taiwan: World Vegetable Center
Year: 2023
Subjects: subject: IRRIGATION
subject: AGRICULTURAL DEVELOPMENT
subject: MALI
subject: VEGETABLES
subject: Impact Evaluation
subject: Irrigation; Agricultural Development; Mali; Vegetables; Impact Evaluation

description: This study evaluates impact of solar irrigation using Propensity Score Matching (PSM). We randomly selected 796 households (463 in the control and 333 in the intervention group). Outcomes included: length of production during dry season (months), quantity of men household labor (USD/ha), quantity of women household labor (USD/ha), quantity of children household labor (USD/ha), quantity of total household labor (USD/ha), cost of paid labor (USD/ha), total household and paid labor (USD/ha), cost of fertilizers (USD/ha), cost of pesticides (USD/ha), quantity of water used (USD/ha), quantity of fuel (USD/ha), other expenses (USD/ha), total expenses (USD/ha), harvest (USD/ha), food lost (USD/ha), income (USD/ha) and food consumption frequencies.
Large loop-coupling enhancement of a heavy pseudoscalar from a light dark sector
Creators: name: Di Chiara, Stefano
name: Hektor, Andi
name: Kannike, Kristjan
name: Marzola, Luca
name: Raidal, Martti
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The small background and the sensitivity to charged particles via a leading order loop coupling make the diphoton channel a privileged experimental test for new physics models. We propose a simple archetypal scenario to generate a sharp di-photon resonance as a result of threshold enhancements in the effective coupling between a heavy pseudoscalar particle and new vector-like leptons. We therefore study three different scenarios consistent with the current experimental limits and deviating from the Standard Model at the 2~$σ$ level. The model also introduces a natural dark matter candidate able to match the observed dark matter abundance and comfortably respect the current direct detection constraints.
description: 14 pages, 4 figures; model changed and analysis performed for three different values of the pseudoscalar mass, paper revised accordingly; to appear on NPB
Towards Integration of High Quality Epitaxial Si Foils into Low-Temperature Back-Contacted Solar Devices
Creators: name: Van Nieuwenhuysen, K.
name: Depauw, V.
name: Bearda, T.
name: Carnemolla, E.
name: Sivaramakrishnan Radhakrishnan, H.
name: Govaerts, J.
name: Granata, S.N.
name: Martini, R.
name: Trompoukis, C.
name: Abdulraheem, Y.
name: Gordon, I.
name: Poortmans, J.
Publisher: name: WIP
Year: 2014
Subjects: THIN FILM SOLAR CELLS
Silicon-based Thin Film Solar Cells

description: 29th European Photovoltaic Solar Energy Conference and Exhibition; 1967-1970
description: ITRPV roadmaps predict that the thickness of wafers will continuously decrease. For thicknesses below 100 μm, alternatives for wafer sawing need to be developed. IMEC proposes a foil creation technique by lifting off a thin epitaxially grown layer as a substitute for wafer sawing to create substrates with a thickness around 40 μm. To enable integration of those foils into solar cells, with sufficiently high yield, an ‘i2-module’ concept is proposed. This is an interdigitated back-contact solar module process that can be applied on very thin foils, and where those foils are supported by either the parent substrate or the module glass at all times. To define a process flow adapted to the requirements and limitations of the epitaxial foils, the stability of the foils is tested during a wide range of front-side processes. It is found that epitaxial foils are not sufficiently stable during high temperature processes. Therefore, a process sequence based on low-temperature processes is defined for front-side processing. The yield of each step in the front-side process flow is evaluated. The constrains for front-side processing, together with the constrains defined by the silicone bond, lead to the choice of a back-contact heterojunction (HJ) cell with a PECVD a-Si:H emitter.
Energy conservation for the weak solutions of the compressible Navier-Stokes equations
Creators: name: Yu, Cheng
Publisher: name: arXiv
Year: 2016
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: In this paper, we prove the energy conservation for the weak solutions of the compressible Navier-Stokes equations for any time $t>0$, under certain conditions. The results hold for the renormalized solutions of the equations with constant viscosities, as well as the weak solutions of the equations with degenerate viscosity. Our conditions do not depend on the dimensions. The energy may conserve on the vacuum for the compressible Navier-Stokes equations with constant viscosities. Our results are the first ones on the energy conservation for the weak solutions of the compressible Navier-Stokes equations.
Applying Design of Experiment to the Modeling and Optimization of a-Si:H/μc-Si:H Tandem Solar Cells
Creators: name: Xin, J.
name: Lee, Y.
name: Zhao, L.
name: Liu, C.
name: Peng, J.
name: Ho, P.
name: Lee, A.Y.-S.
name: Leung, B.
Publisher: name: WIP
Year: 2014
Subjects: THIN FILM SOLAR CELLS
Silicon-based Thin Film Solar Cells

description: 29th European Photovoltaic Solar Energy Conference and Exhibition; 1948-1951
description: In this work, we applied the methodology of design of experiment on top of the fitted models of a- Si:H/μc-Si:H tandem solar cells. The purpose of this new application is to widen the design space as well as to develop an efficient way to identify the most influential structural and material parameters. This way, not only can we gain better insights of the inner working of the device through parameter extraction and visualization, we can also quantify the relative importance of each parameter. The information obtained will then serve as guidance for further performance optimization and finally be verified in practice.
Reduced C*-algebras of Fell bundles over inverse semigroups
Creators: name: Buss, Alcides
name: Exel, Ruy
name: Meyer, Ralf
Publisher: name: arXiv
Year: 2015
Subjects: subject: Operator Algebras (math.OA)
subject: FOS: Mathematics
subject: 46L55, 20M18, 22A22

description: We construct a weak conditional expectation from the section C*-algebra of a Fell bundle over a unital inverse semigroup to its unit fibre. We use this to define the reduced C*-algebra of the Fell bundle. We study when the reduced C*-algebra for an inverse semigroup action on a groupoid by partial equivalences coincides with the reduced groupoid C*-algebra of the transformation groupoid, giving both positive results and counterexamples.
Quark number holonomy and confinement-deconfinement transition
Creators: name: Kashiwa, Kouji
name: Ohnishi, Akira
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We propose a new quantity which describes the confinement-deconfinement transition based on topological properties of QCD. The quantity which we call the quark number holonomy is defined as the integral of the quark number susceptibility along the closed loop of $θ$ where $θ$ is the dimensionless imaginary chemical potential. Expected behavior of the quark number holonomy at finite temperature is discussed and its asymptotic behaviors are shown.
description: 6 pages, 2 figures
2D Periodic Photonic Nanostructures Integrated in 40 µm Thin Crystalline Silicon Solar Cells
Creators: name: Trompoukis, C.
name: El Daif, O.
name: Depauw, V.
name: Bearda, T.
name: Van Nieuwenhuysen, K.
name: Govaerts, J.
name: Sivaramakrishnan Radhakrishnan, H.
name: Martini, R.
name: Granata, S.
name: Gordon, I.
name: Mertens, R.
name: Poortmans, J.
Publisher: name: WIP
Year: 2014
Subjects: THIN FILM SOLAR CELLS
Silicon-based Thin Film Solar Cells

description: 29th European Photovoltaic Solar Energy Conference and Exhibition; 1952-1954
description: Two-dimensional (2D) periodic photonic nanostructures are fabricated by nanoimprint lithography (NIL) and dry plasma (Dry-NIL) etching on 40 μm thick epitaxially-grown crystalline silicon (c-Si) foils, resulting in nanostructures with a parabolic profile. These nanostructures are integrated in a 40 μm thick double side contacted c-Si/aSi:H heterojunction solar cell architecture. The front side is processed when the foil is attached to the parent substrate while the back side is processed when the foil is bonded to the glass carrier. Although the efficiency of the nanopatterned cell was lower compared to the random pyramid textured cells it had a better absorption and spectral response for long wavelengths, highlighting a better light trapping behavior.
COUNTING SORGHUM LEAVES FROM RGB IMAGES BY PANOPTIC SEGMENTATION
Creators: name: Ostermann, Ian
Publisher: name: Purdue University Graduate School
Year: 2024
Subjects: classificationCode: 460304
subject: Computer vision
classificationCode: 460306
subject: Image processing
classificationCode: 460103
subject: Applications in life sciences

description: Meeting the nutritional requirements of an increasing population in a changing climate is the foremost concern of agricultural research in recent years. A solution to some of the many questions posed by this existential threat is breeding crops that more efficiently produce food with respect to land and water use. A key aspect to this optimization is geometric aspects of plant physiology such as canopy architecture that, while based in the actual 3D structure of the organism, does not necessarily require such a representation to measure. Although deep learning is a powerful tool to answer phenotyping questions that do not require an explicit intermediate 3D representation, training a network traditionally requires a large number of hand-segmented ground truth images. To bypass the enormous time and expense of hand- labeling datasets, we utilized a procedural sorghum image pipeline from another student in our group that produces images similar enough to the ground truth images from the phenotyping facility that the network can be directly used on real data while training only on automatically generated data. The synthetic data was used to train a deep segmentation network to identify which pixels correspond to which leaves. The segmentations were then processed to find the number of leaves identified in each image to use for the leaf-counting task in high-throughput phenotyping. Overall, our method performs comparably with human annotation accuracy by correctly predicting within a 90% confidence interval of the true leaf count in 97% of images while being faster and cheaper. This helps to add another expensive- to-collect phenotypic trait to the list of those that can be automatically collected.
La guerra aerea in Italia: la distruzione rimossa Recensione a: Marco Gioannini, Giulio Massobrio, Bombardate l’Italia. Storia della guerra di distruzione aerea 1940-1945, Rizzoli, Milano 2007
Creators: name: Paronuzzi Marco
Publisher: name: La Rivista di Engramma
Year: 2008
Subjects: WW2
Distructions
Bombings
Airwar

description: Review of the volume “Bombardate l’Italia. Storia della guerra di distruzione aerea 1940-1945“ written by Marco Gioanini and Giulio Massobrio and published by Rizzoli. The book brings to attention the history of the war of aerial destruction suffered by Italy during the Second World War, looking for the causes that led to the catastrophe of the bombings and analyzing the different phases with which they hit the peninsula. The exhibition project, which the authors themselves define as ambitious, is to "propose a narrative that holds together very different perspectives, those 'from above' and those 'from below'", meaning to cross the point of view of those who - with political and military strategies - he carried out the bombings, and of those who - with initial disbelief - suffered the bombings.
Low carbon energy and energy efficiency policies - EERAdata project deliverable
Creators: name: Kruczek, Mariusz
name: Zgórska, Aleksandra
name: Jąderko-Skubis, Karolina
name: Markowska, Małgorzata
Publisher: name: Zenodo
Year: 2023
Subjects: EERAdata
FAIR
energy community

description: The document briefly presents the purpose and scope of the work carried out within the framework of Work package No.7 (WP title: Use case 4:Low carbon energy and energy efficiency policies) within EERAdata project. The following material has been prepared in the form of a synthetic report which also constitutes an input to the EOSC Portal - European Open Science Cloud (EOSC), which aims to provide European researchers, innovators, companies and citizens with a federated and open multi-disciplinary environment where they can publish, find and re-use data, tools and services for research, innovation and educational purposes.
Dynamical Degree and Arithmetic Degree of Endomorphisms on Product Varieties
Creators: name: Sano, Kaoru
Publisher: name: arXiv
Year: 2016
Subjects: subject: Number Theory (math.NT)
subject: Algebraic Geometry (math.AG)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37P55, 14G40, 14G05, 14G25, 11G50, 11G35

description: For a dominant rational self-map on a smooth projective variety defined over a number field, Shu Kawaguchi and Joseph H. Silverman conjectured that the dynamical degree is equal to the arithmetic degree at a rational point whose forward orbit is well-defined and Zariski dense. We give some examples of self-maps on product varieties and rational points on them for which the Kawaguchi-Silverman conjecture holds.
description: 12 pages
Extracorporeal membrane oxygenation during pregnancy and peripartal. An international retrospective multicenter study
Creators: name: Malfertheiner, Sara Fill
name: Brodie, D.
name: Burrell, A.
name: Taccone, F.S.
name: Broman, L.M.
name: Shekar, K.
name: Agerstrand, C.L.
name: Serra, A. L.
name: Fraser, J.
name: Malfertheiner, Maximilian Valentin
Publisher: name: Universität Regensburg
Year: 2022
Subjects: subject: extracorporeal membrane oxygenation, pregnancy, peripartum, hemorrhage, influenza, pneumonia, acute respiratory distress syndrome, pulmonary embolism, amniotic fluid embolism, cardiomyopathy
subject: 610 Medizin

description: Introduction Extracorporeal Membrane Oxygenation (ECMO) may be used in the setting of pregnancy or the peripartal period, however its utility has not been well-characterized. This study aims to give an overview on the prevalence of peripartel ECMO cases and further assess the indications and outcomes of ECMO in this setting across multiple centers and countries. Methods A retrospective, multicenter, international cohort study of pregnant and peripartum ECMO cases was performed. Data were collected from six ECMO centers across three continents over a 10-year period. Results A total of 60 pregnany/peripartal ECMO cases have been identified. Most frequent indications are acute respiratory distress syndrome (n = 30) and pulmonary embolism (n = 5). Veno-venous ECMO mode was applied more often (77%). ECMO treatment during pregnancy was performed in 17 cases. Maternal and fetal survival was high with 87% (n = 52), respectively 73% (n = 44). Conclusions Various emergency scenarios during pregnancy and at time of delivery may require ECMO treatment. Peripartal mortality in a well-resourced setting is rare, however emergencies in the labor room occur and knowledge of available rescue therapy is essential to improve outcome. Obstetricians and obstetric anesthesiologists should be aware of the availability of ECMO resource at their hospital or region to ensure immediate contact when needed.
UniSAFE: National Council Of Research – institutional policy to address gender-based violence
Creators: name: Andreska, Zuzana
name: Huck, Averil
name: Linkova, Marcela
Publisher: name: Zenodo
Year: 2022
Subjects: Gender based-violence
policy framework
gender+
institutional policy

description: UniSAFE has mapped the policies and measures to address and combat GBV in 48 universities and research organisations in 15 European countries. For each institution, the team created Vignettes which present national context, institutional policy, training, role in knowledge production, content of the policy, institutional procedure and implementation of the policy.
Cu(In,Ga)Se2 Solar Cells on Flexible Substrate Fabricated by an Innovative Roll to Roll Hybrid Sputtering and Evaporation Process
Creators: name: Acciarri, M.
name: Le Donne, A.
name: Mereu, R.
name: Garattini, P.
name: Falcone, M.
name: Marchionna, S.
name: Meschia, M.
name: Moneta, R.
name: Gasparotto, A.
name: Binetti, S.
Publisher: name: WIP
Year: 2014
Subjects: THIN FILM SOLAR CELLS
CdTe, CIS and Related Ternary and Quaternary Thin Film Solar Cells

description: 29th European Photovoltaic Solar Energy Conference and Exhibition; 1837-1839
description: Nowadays there are two main approaches to produce CIGS solar cells: sputtering followed by
selenization evaporation and coevaporation process. High efficiency solar cells are obtained by the sequential threestage
co-evaporation process. On the other hand sputtering system is more suitable for an industrial application but
the efficiencies are systematically lower. In our laboratory we have developed a new hybrid sputtering and
evaporation system to obtain a scalable process combining the advantages of both techniques. This technique has
been already applied to deposition on glass and stainless steel substrates. Quite good results were obtained reaching
an efficiency of 15% on glass and 13% on stainless steel substrates respectively. In this paper we report the results
obtained on polyimide and thin boron silicate glass (100um) films.
Scalar and vector self-energies of heavy baryons in nuclear medium
Creators: name: Azizi, K.
name: Er, N.
name: Sundu, H.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The in-medium sum rules are employed to calculate the shifts in the mass and residue as well as the scalar and vector self-energies of the heavy $Λ_Q, Σ_Q$ and $Ξ_Q$ baryons, with Q being $b$ or $c$ quark. The maximum shift in mass due to nuclear matter belongs to the $Σ_c$ baryon and it is found to be $Δm_{Σ_{c}}=-936 ~ MeV$. In the case of residue, it is obtained that the residue of $Σ_b$ baryon is maximally affected by the nuclear medium with the shift $Δλ_{Σ_b} = -0.014 ~ GeV^3 $. The scalar and vector self-energies are found to be $Σ^{S}_{Λ_b} = 653 ~ MeV$, $Σ^{S}_{Σ_b} = -614 ~ MeV $, $Σ^{S}_{Ξ_b} = -17 ~ MeV $, $Σ^{S}_{Λ_c} = 272 ~ MeV $, $Σ^{S}_{Σ_c} = -936 ~ MeV $, $Σ^{S}_{Ξ_c} = -5 ~ MeV $ and $Σ^ν_{Λ_b} = 436 \pm 148 ~ MeV $, $Σ^ν_{Σ_b} = 382 \pm 129 ~MeV $, $Σ^ν_{Ξ_b} =15 \pm 5 ~ MeV$, $Σ^ν_{Λ_c} = 151 \pm 45 ~ MeV $, $Σ^ν_{Σ_c} = 486 \pm 144 ~ MeV $ and $Σ^ν_{Ξ_c} = 1.391 \pm 0.529 ~ MeV $.
description: 13 Pages, 11 Figures and 5 Tables
Quantum systems under frequency modulation
Creators: name: Silveri, M. P.
name: Tuorila, J. A.
name: Thuneberg, E. V.
name: Paraoanu, G. S.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We review the physical phenomena that arise when quantum mechanical energy levels are modulated in time. The dynamics resulting from changes in the transition frequency is a problem studied since the early days of quantum mechanics. It has been of constant interest both experimentally and theoretically since, with the simple two-state model providing an inexhaustible source of novel concepts. When the transition frequency of a quantum system is modulated, several phenomena can be observed, such as Landau-Zener-Stückelberg-Majorana interference, motional averaging and narrowing, and the formation of dressed states with the presence of sidebands in the spectrum. Adiabatic changes result in the accumulation of geometric phases, which can be used to create topological states. In recent years, an exquisite experimental control in the time domain was gained through the parameters entering the Hamiltonian, and high-fidelity readout schemes allowed the state of the system to be monitored non-destructively. These developments were made in the field of quantum devices, especially in superconducting qubits, as a well as in atomic physics, in particular in ultracold gases. As a result of these advances, it became possible to demonstrate many of the fundamental effects that arise in a quantum system when its transition frequencies are modulated. The purpose of this review is to present some of these developments, from two-state atoms and harmonic oscillators to multilevel and many-particle systems.
description: review article (77 pages, 13 figures)
Performance of EVA Encapsulated CdTe Devices and Micro-Modules Grown by MOCVD under Heat/Humidity Testing
Creators: name: Hodgson, S.D.
name: Kartopu, G.
name: Crozier, M.
name: Adamson, P.
name: Barrioz, V.
name: Rugen-Hankey, S.
name: Tejedor, E.
name: Dupin, D.
name: Clayton, A.J.
name: Brooks, W.S.M.
name: Lamb, D.A.
name: Brunton, A.
name: Irvine, S.J.C.
Publisher: name: WIP
Year: 2014
Subjects: THIN FILM SOLAR CELLS
CdTe, CIS and Related Ternary and Quaternary Thin Film Solar Cells

description: 29th European Photovoltaic Solar Energy Conference and Exhibition; 1840-1843
description: MOCVD grown CdTe devices and micro-modules have been put through damp-heat and thermal cycling environmental tests as prescribed by the IEC 61646 standard to probe for degradation pathways. The devices have been found to have highly robust junctions through non-encapsulated damp-heat tests. Application of metal-strip contacts yielded a drop in Voc stability, the primary reason for which has been identified and corrected. Several metal contacts and desiccants have been examined, and their impact on module lifetime to damp-heat tests has been investigated. Micro-modules have survived > 400 thermal-cycling tests whilst maintaining their performance.