cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Optimizing PV-Diesel-Battery Hybrid Systems to Achieve Lowest Possible LCOE
Creators: name: Dielmann, G.
name: Rothert, M.
name: Wachenfeld, V.
Publisher: name: WIP
Year: 2013
Subjects: PV SYSTEMS
PV Applications without a Centralised Grid

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 4466-4471
description: The prices of grid-tied PV systems are constantly decreasing. This has also a great impact on the
feasibility of off-grid PV applications. The effect on the costs differ depending on whether it is a small system of less
than 10 kW as installed in Solar Home Systems (SHS) or a mini-grid within the range 50-500 kW or a PV-Diesel grid
in the MW-range. Such systems consist of PV modules, diesel generators, batteries, and the electric system
components. The many components makes the optimization complex as many factors have impact on the cost
structure. Therefore all major factors are identified and evaluated according to their strength by a sensitivity analysis
combined with detailed simulations. It is found that today the major cost drives are fuel price and battery price. As a
result of battery aging mechanisms principally the capacity throughput causes the battery costs. Thus, the possibility
to use PV directly as done in AC coupled systems is crucial. In any applications a high PV penetration enhances
battery life and therefore achieves lowest LCOE. In bigger systems with a leveled load the battery can be used as
extended diesel generator spinning reserve which also minimizes the LCOE.
Economic Optimization of Hybrid PV Systems in Africa
Creators: name: Lokhat, I.
name: Lelong, B.
name: Fortin, G.
Publisher: name: WIP
Year: 2013
Subjects: PV SYSTEMS
PV Applications without a Centralised Grid

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 4472-4474
description: In several African countries, many areas are not covered with interconnected power grids. Electricity
production costs are high because it is mainly produced from diesel generators, and even if solar electricity is already
economically competitive, the sizes of these small non-interconnected grids are not large enough to withstand high
PV capacities. It clearly appears that the main technical obstacle (besides economical, financial and political
obstacles) to the development of solar PV as a mainstream mode of electricity generation is the integration to local
power grids. That is why hybridisation of PV with diesel generators is a suitable way to promote solar energy in such
contexts.
The design of such power plants shall always take into consideration economic parameters, as the final judgment
criterion is the Levelized Cost of Electricity (LCOE). Within this perspective, the performed sensitivity analysis
exhibits very different optimum choices.
title: Blood in milk in horned dairy cows–Exploration of incidences and prevention opportunities
Creators: name: Ebinghaus, Asja
name: Johns, Julia
name: Knierim, Ute
Publisher: name: Universität Kassel
Year: 2023
Subjects: subject: dairy cattle
subject: horned cows
subject: udder health
subject: blood in milk
subject: 590
subject: 630
subject: Milchkuh
subject: Horn
subject: Euter
subject: Tiergesundheit
subject: Milch
subject: Blut

description: Gefördert durch den Publikationsfonds der Universität Kassel
Tunable plasmonic reflection by bound 1D electron states in a 2D Dirac metal
Creators: name: Jiang, Bor-Yuan
name: Ni, Guangxin
name: Pan, Cheng
name: Fei, Zhe
name: Cheng, Bin
name: Lau, Chun Ning
name: Bockrath, Marc
name: Basov, Dimitri N.
name: Fogler, Michael M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We show that surface plasmons of a two-dimensional Dirac metal such as graphene can be reflected by line-like perturbations hosting one-dimensional electron states. The reflection originates from a strong enhancement of the local optical conductivity caused by optical transitions involving these bound states. We propose that the bound states can be systematically created, controlled, and liquidated by an ultranarrow electrostatic gate. Using infrared nanoimaging, we obtain experimental evidence for the locally enhanced conductivity of graphene induced by a carbon nanotube gate, which supports this theoretical concept.
description: 14 pages, 12 figures, submitted to PRL
Investigation the Advantages of CPV for Building Integrated PV
Creators: name: Sonneveld, P.J.
name: Van Der Craats, S.
name: Sparemberger, A.R.
name: Sahedi, J.V.
name: Catau, R.G.
Publisher: name: WIP
Year: 2013
Subjects: PV SYSTEMS
PV and Architecture

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 4398-4402
description: The objective of this concept is a significant reduction of energy consumption in greenhouses and buildings
with large facades and windows by using available solar energy. The scope of this investigation is to study the advantages of
a building integrated CPV system. The basic idea is that a larger fraction of the available solar energy can be converted to
useful energy, a better indoor climate and higher crop yield (for greenhouses). The building integrated CPV systems as
proposed is able to deliver at least four benefits for buildings: Electrical- and thermal energy generation, illumination by
using the remaining diffuse light and better indoor climate circumstances which arise by the removal of the energy-rich direct
radiation. Yields for the Dutch climate situation are estimated to be 120 kWh/m2 of electrical energy and 300 kWh/m2
thermal energy, which can be used for energy supply and/or operation of an extra cooling system. These figures can be
translated in financial benefits: Calculated payback time is six year for the system that is presented here.
Uniform convergence of proliferating particles to the FKPP equation
Creators: name: Flandoli, Franco
name: Leimbach, Matti
name: Olivera, Christian
Publisher: name: arXiv
Year: 2016
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: In this paper we consider a system of Brownian particles with proliferation whose rate depends on the empirical measure. The dependence is more local than a mean field one and has been called moderate interaction by Oelschlager [17], [18]. We prove that the empirical process converges, uniformly in the space variable, to the solution of the Fisher-Kolmogorov-Petrowskii-Piskunov equation. We use a semigroup approach which is new in the framework of these systems and is inspired by some literature on stochastic partial differential equations.
Simulation of PV/Wind/ Diesel Hybrid Power Systems for Rural Electrification in Algeria
Creators: name: Saheb-Koussa, D.
name: Koussa, M.
name: Hadji, S.
name: Makhloufi, S.
Publisher: name: WIP
Year: 2013
Subjects: PV SYSTEMS
PV Applications without a Centralised Grid

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 4403-4409
description: Adrar region is a typical rural area in Algeria where connection to the national grid is not possible even in the
future. Diesel is the main fuel for full filling the energy demand. Solar and Wind resources are the hybrid options for this site.
The HOMER energy modeling software is available for optimization of renewable based energy efficient systems for single and up to 20 homes. It shows that the energy costs are more attractive for the electrification of 20 homes where per unit
(kWh) cost of energy varies from 2.23 to 1.759 USD. For a single –wire grid extension cost of 8000$/km, operation and
maintenance cost of 160 $/yr./km and grid power price of 0.1 $/km, the breakeven grid extension distances were found to be
3.71 km for single home and 53.1km for 20 homes respectively. On the other hand, it is found that the optimum results of
hybrid renewable system show a 91 % and 92 % reduction of emissions respectively for a single home as well as for 20
homes. The RF of the optimized system evaluates to, respectively, 91 % and 92 % for single and 20 homes relative to the studied location.
Technical Feasibility and Economical Analysis of Hybrid PV/Diesel Power Generation System
Creators: name: Diaf, S.
name: Rafa, S.
name: Diaf, D.
Publisher: name: WIP
Year: 2013
Subjects: PV SYSTEMS
PV Applications without a Centralised Grid

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 4410-4413
description: The present work presents a methodology to design and analyze the performance of a PV/diesel hybrid
power systems using computer aided design. The analysis is applied to a given load of village located at the southern
part of Algeria. Total daily energy is 254 kWh with maximum power peak load is 18.8 kW.
The objective of this work is to develop a decision-making tool that allows the opportunity evaluation for combining
micro diesel power stations with photovoltaic system.
Solving QBF by Abstraction
Creators: name: Hecking-Harbusch, Jesko
name: Tentrup, Leander
Publisher: name: arXiv
Year: 2016
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: Many verification and synthesis approaches rely on solving techniques for quantified Boolean formulas (QBF). Consequently, solution witnesses, in the form of Boolean functions, become more and more important as they represent implementations or counterexamples. We present a recursive counterexample guided abstraction and refinement algorithm (CEGAR) for solving and certifying QBFs that exploits structural reasoning on the formula level. The algorithm decomposes the given QBF into one propositional formula for every block of quantifiers that abstracts from assignments of variables not bound by this quantifier block. Further, we show how to derive an efficient certification extraction method on top of the algorithm. We report on experimental evaluation of this algorithm in the solver QuAbS (Quantified Abstraction Solver) which won the most recent QBF competition (QBFEVAL'18). Further, we show the effectiveness of the certification approach using synthesis benchmarks and a case study for synthesizing winning strategies in Petri Games.
description: In Proceedings GandALF 2018, arXiv:1809.02416
Tailoring Ionomer Encapsulants as a Low Cost Solution to Potential Induced Degradation
Creators: name: Kapur, J.
name: Bennett, A.
name: Norwood, J.
name: Hamzavy, B.
name: Kueppenbender, I.
Publisher: name: WIP
Year: 2013
Subjects: MATERIAL STUDIES, NEW CONCEPTS, ULTRA-HIGH EFFICIENCY AND SPACE TECHNOLOGY
Novel Materials and Concepts for Modules

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 476-479
description: Significant power loss has been observed in photovoltaic (PV) modules in the service environment as a result of
system voltage with respect to the ground. The type of failure instigated by high humidity and aggravated by salt, and other
pollutants in the presence of a high system voltage has been called potential-induced degradation (PID). Encapsulant materials
provide protection and electrical isolation of the solar components in PV modules. Several researchers (1, 2, 3) have shown that
the type of encapsulant can directly affect the severity of the PID. Ionomers, in particular, were amongst the first encapsulants
identified as having the ability to prevent this degradation mechanism. Ionomers are a family of polymers which can be tailored,
by the control of starting monomers and manufacturing process, to have a unique range of electrical and physical properties. In
this study, we varied the ionomer type, sheet design, and module structure to better understand their effect on PID of minimodules.
Results show that the structure of the ionomer, its thickness, and its location in the module construction can affect the
degradation in power and shunt resistance of a PV module. Through this enhanced understanding we were able to design a
product optimized for both performance and cost.
Autonomous Lighting System Powered by Hybrid Wind-Solar Unit (ALS Powered by WSU)
Creators: name: Yurchenko, A.V.
name: Yurchenko, E.
name: Maikova, O.
name: Siemens, E.
Publisher: name: WIP
Year: 2013
Subjects: PV SYSTEMS
PV Applications without a Centralised Grid

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 4422-4425
description: Development of renewable energy sources is an extremely important strategic
direction of future energetics in any country throughout the world. Acceleration of their
development is currently essential to provide both energy security of the peripheral regions cut off
the centralized power supply and reliable groundwork and modernization of national energetics
innovative development for future generations.
The paper reports on the results of theoretical and experimental research into autonomous
lighting systems (ALS) powered by 5kW hybrid wind-solar unit (WSU) 5 kW conducted in Russia
(Tomsk) over the period 2008 – 2012. Testing over 5 years and a large amount of theoretical studies
enabled us to develop a precise model of the ALS powered by WSU in real-life environment under
different climatic conditions of the region.
Reactive two-body and three-body collisions of Ba$^+$ in an ultracold Rb gas
Creators: name: Krükow, Artjom
name: Mohammadi, Amir
name: Härter, Arne
name: Denschlag, Johannes Hecker
Publisher: name: arXiv
Year: 2016
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We analyze reactive collisions of a single Ba$^+$ ion in contact with an ultracold gas of Rb atoms at low three-body collision energies of 2.2(9) mK$\times k_{\mathrm{B}}$. Mapping out the Ba$^+$ loss rate dependence on the Rb atom density we can discern two-body reactive collisions from three-body ones and for the first time determine both rate coefficients which are $k_2=3.1(6)(6)\times 10^{-13}\textrm{cm}^{3}\textrm{s}^{-1}$ and $k_3=1.04(4)(45)\times 10^{-24}\textrm{cm}^{6}\textrm{s}^{-1}$, respectively (statistical and systematic errors in parenthesis). Thus, the measured ternary recombination dominates over binary reactions even at moderate atom densities of $n\approx 10^{12}\: \textrm{cm}^{-3}$. The results for Ba$^+$ and Rb are representative for a wide range of cold ion-atom systems and can serve as a guidance for the future development of the field of hybrid atom-ion research.
description: 4 pages, 3 figures
Development of a Novel Fluorescent Solar Concentrator Concept Based on Inorganic Host and Förster Resonance Energy Transfer
Creators: name: Martínez, A.L.
name: Menéndez-Velázquez, A.M.
name: García, A.B.
name: Andrés Menéndez, L.J.
name: Menéndez, M.F.
name: Gómez Plaza, D.
Publisher: name: WIP
Year: 2013
Subjects: MATERIAL STUDIES, NEW CONCEPTS, ULTRA-HIGH EFFICIENCY AND SPACE TECHNOLOGY
Novel Materials and Concepts for Modules

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 457-459
description: In this work it is proposed a “second generation” fluorescent solar concentrator (FSC) based on the
combination of i)the substitution of organic host materials by inorganic SiOx coatings prepared by solgel technology,
ii) the widening of absorption spectra of fluorescent dyes through Förster Resonance Energy Transfer mechanisms.
With the combination of this two aims, FSCs with double efficiency than “first generation” FSCs and with less
photodegradation have been achieved.
Group dualities, T-dualities, and twisted K-theory
Creators: name: Mathai, Varghese
name: Rosenberg, Jonathan
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Algebraic Topology (math.AT)
subject: K-Theory and Homology (math.KT)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 19L50 (Primary), 81T30, 57T10 (Secondary)

description: This paper explores further the connection between Langlands duality and T-duality for compact simple Lie groups, which appeared in work of Daenzer-Van Erp and Bunke-Nikolaus. We show that Langlands duality gives rise to isomorphisms of twisted K-groups, but that these K-groups are trivial except in the simplest case of SU(2) and SO(3). Along the way we compute explicitly the map on $H^3$ induced by a covering of compact simple Lie groups, which is either 1 or 2 depending in a complicated way on the type of the groups involved. We also give a new method for computing twisted K-theory using the Segal spectral sequence, giving simpler computations of certain twisted K-theory groups of compact Lie groups relevant for D-brane charges in WZW theories and rank-level dualities. Finally we study a duality for orientifolds based on complex Lie groups with an involution.
description: 29 pages, mild revision
Small Stand Alone PV Systems – Solar PV Sculptures and Hardscape
Creators: name: Shepovalova, O.V.
name: Strebkov, D.S.
Publisher: name: WIP
Year: 2013
Subjects: PV SYSTEMS
PV and Architecture

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 4384-4387
description: In this work the issues of efficient isolated stand alone PV systems that at the same time perform the
functions of hardscape or sculptures items have been discussed. The solutions based on toroidal solar concentrators
for traditional sculptures, organic sculptures, as well as those in urban style have been presented. One other objective
of research was to get this approach noticed and to show that solar installations can be blend naturally with historical
parks and palace complexes, museums without disturbing their esthetics built over a period of centuries.
Optical Properties of Photonic Nanostructures Coupled with Ge Quantum Dots Formed by Maskless Wet Etching Process
Creators: name: Hoshi, Y.
name: Ooi, K.
name: Tayagaki, T.
name: Kiguchi, T.
name: Usami, N.
Publisher: name: WIP
Year: 2013
Subjects: MATERIAL STUDIES, NEW CONCEPTS, ULTRA-HIGH EFFICIENCY AND SPACE TECHNOLOGY
New Materials and Concepts for Cells

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 416-419
description: We demonstrate that maskless wet etching of self-assembled Ge quantum dot (QD) multilayers can
form large-area photonic nanostructures, and the geometry can be tuned by changing wet etching conditions and
controlling structural parameters of Ge QD multilayers. It is shown that the reflectance in the entire wavelength is
decreased by formation of photonic nanostructures, and the shape and depth of surface dips contribute to reduction of
the reflectance effectively. Furthermore, we found that external quantum efficiency can be enhanced in the entire
wavelength for solar cells with photonic nanostructures coupled with Ge QD multilayers compared with crystal Si
solar cells. These results indicate that a solar cell with photonic nanostructures coupled with QDs formed by maskless
wet etching has a high potential for not only improvement of solar cell properties, but also mass production due to
low fabrication cost and large-area process.
The relationships between message passing, pairwise, Kermack-McKendrick and stochastic SIR epidemic models
Creators: name: Wilkinson, Robert R.
name: Ball, Frank G.
name: Sharkey, Kieran J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Probability (math.PR)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We consider a very general stochastic model for an SIR epidemic on a network which allows an individual's infectious period, and the time it takes to contact each of its neighbours after becoming infected, to be correlated. We write down the message passing system of equations for this model and prove, for the first time, that it has a unique feasible solution. We also generalise an earlier result by proving that this solution provides a rigorous upper bound for the expected epidemic size (cumulative number of infection events) at any fixed time $t>0$. We specialise these results to a homogeneous special case where the graph (network) is symmetric. The message passing system here reduces to just four equations. We prove that cycles in the network inhibit the spread of infection, and derive important epidemiological results concerning the final epidemic size and threshold behaviour for a major outbreak. For Poisson contact processes, this message passing system is equivalent to a non-Markovian pair approximation model, which we show has well-known pairwise models as special cases. We show further that a sequence of message passing systems, starting with the homogeneous one just described, converges to the deterministic Kermack-McKendrick equations for this stochastic model. For Poisson contact and recovery, we show that this convergence is monotone, from which it follows that the message passing system (and hence also the pairwise model) here provides a better approximation to the expected epidemic size at time $t>0$ than the Kermack-McKendrick model.
description: 28 pages, J. Math. Biol. (2017)
Sintered Low Resistivity Substrates for Hybrid Solar Cells
Creators: name: Stokkan, G.
name: Johanson, A.
name: Øvrelid, E.-J.
name: Ciftja, A.
name: Hennicke, J.
name: Ulyashin, A.
Publisher: name: WIP
Year: 2013
Subjects: MATERIAL STUDIES, NEW CONCEPTS, ULTRA-HIGH EFFICIENCY AND SPACE TECHNOLOGY
New Materials and Concepts for Cells

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 427-430
description: Highly conductive sintered silicon is a promising material which can be used as substrates for high
efficiency devices deposited on or bonded to the surface of such supporting substrates. This work presents results
concerning sintering of such material by hot pressing (HP) and Spark Plasma Sintering (SPS) methods. The samples
were characterized by Light and electron microscopy, Electron Backscatter Diffraction, Energy Dispersive
Diffraction and Glow Discharge Mass Spectrometry. The texture was substantially different between the two
materials with random orientation and grain boundaries for HP and considerable Coincidence Site Lattice (CSL) and
twinning for the SPS material. Considerable particulate contamination of W, Fe, Cr and Al was detected by EDS.
Dislocation density was high, but could not be reliably characterized by etching method. Such defect and
contamination levels are not necessarily detrimental for hybrid structures, although presence of fast diffusing
elements may pose challenges due to transfer to the high quality layer during depositing or bonding.
Medium-Term Degradation of Different Photovoltaic Technologies under Outdoor Conditions in Alpine Area
Creators: name: Belluardo, G.
name: Ingenhoven, P.
name: Moser, D.
Publisher: name: WIP
Year: 2013
Subjects: PV SYSTEMS
PV System and Grid Integration Aspects

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 4318-4321
description: The assessment of module degradation is a key factor for the development of the photovoltaic market.
Investors and utility companies need to accurately predict the energy production of PV systems in the long-term,
manufacturers need to improve the reliability and durability of their products.
Degradation rates warranted by manufacturers are estimated through accelerated indoor tests, even though module
technology and manufacturing processes are not the only factors affecting module durability over the years: climatic
and weather conditions at the PV system location must be adequately taken into consideration. For this reason, many
studies in the past processed outdoor PV monitoring data to assess the degradation rate.
This work focuses on the evaluation of degradation rates of different PV technologies installed at the Airport Bolzano
Dolomiti (ABD) test plant, monitored by EURAC: monocrystalline silicon (mc-Si), polycrystalline silicon (pc-Si),
amorphous silicon (a-Si), micromorph silicon (a-Si/μc-Si), Cadmium Telluride (CdTe) and Copper Indium Gallium
Selenide (CIGS). The second and third year of plant operation are considered, in order to evaluate the medium-term
degradation process. Three different methodologies: PVUSA, Performance Ratio and Maximum Power at Standard
Test Conditions are employed and the results compared.
An algebra of Stein operators
Creators: name: Gaunt, Robert E.
name: Mijoule, Guillaume
name: Swan, Yvik
Publisher: name: arXiv
Year: 2016
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: We build upon recent advances on the distributional aspect of Stein's method to propose a novel and flexible technique for computing Stein operators for random variables that can be written as products of independent random variables. We show that our results are valid for a wide class of distributions including normal, beta, variance-gamma, generalized gamma and many more. Our operators are $k$th degree differential operators with polynomial coefficients; they are straightforward to obtain even when the target density bears no explicit handle. As an application, we derive a new formula for the density of the product of $k$ independent symmetric variance-gamma distributed random variables.
description: 20 pages
Community support discussions: FAIR implementation for NI4OS-Europe service providers
Creators: name: Athenodorou, Andreas
name: Sarkar, Arkopaul
name: Vassallo, Valentina
name: Artopoulos, Georgios
name: Cournia, Zoe
name: Zecevic, Zarko
name: Sevkusic, Milica
name: Khachidze, Irma
name: Risojevic, Vladimir
name: Pejov, Ljupco
Publisher: name: Zenodo
Year: 2022
Subjects: FAIR data
service providers
FAIRification
semantics
metadata
ontologies

description: On Friday 29th April, NI4OS-Europe engaged in tailored discussions with service providers to answer their FAIR related questions and support their needs with respect to metadata, ontologies and semantics. In the 3hour interactive workshop, service providers had the opportunity to learn about best practices from the experts of the NI4OS-Europe semantics experts group and the OntoCommons projects as well as presented their services and get customised support.
Central tetrads and quantum spacetimes
Creators: name: Borowiec, Andrzej
name: Juric, Tajron
name: Meljanac, Stjepan
name: Pachol, Anna
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: In this paper, we perform a parallel analysis to the model proposed in [25]. By considering the central co-tetrad (instead of the central metric), we investigate the modifications in the gravitational metrics coming from the noncommutative spacetime of the $κ$-Minkowski type in four dimensions. The differential calculus corresponding to a class of Jordanian $κ$-deformations provides metrics, which lead either to cosmological constant or spatial curvature type solutions of non-vacuum Einstein equations. Among vacuum solutions, we find pp-wave type.
description: 12 pages, published version, title modified
Combination of Safety Functions – Interaction and Approach for System Design
Creators: name: Häring, A.
name: Laschinski, J.
name: Meinhardt, M.
Publisher: name: WIP
Year: 2013
Subjects: PV SYSTEMS
PV System and Grid Integration Aspects

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 4331-4332
description: More and more safety products and concepts are used in PV systems. To cover different safety aspects,
different concepts are combined in PV systems. Such combinations are mostly without problems in AC systems
(distribution and consumption circuits). In PV system with their special conditions the combination is not possible in
any case. In most cases industry and plant designer are not aware of interaction between these concepts, which can
result in loss of functionality.
The Combinations of safety concepts with strong impact on characteristic of one or both functionalities and their
limitations are shown. Further there are different requirements for safety and different on-site conditions at each
plant. An approach to handle this issue in practice is shown. System designer get a tool to handle the situation.
Complex Analysis of Askaryan Radiation: A Fully Analytic Treatment including the LPM effect and Cascade Form Factor
Creators: name: Hanson, Jordan C.
name: Connolly, Amy L.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The Askaryan effect describes coherent electromagnetic radiation from high-energy cascades in dense media with a collective charge. We present an analytic model of Askaryan radiation that accounts simultaneously for the three- dimensional form factor of the cascade, and quantum mechanical cascade elongation via the Landau-Pomeranchuk- Migdal effect. These calculations, and the associated open-source code, allow the user to avoid computationally intensive Monte Carlo cascade simulations. Searches for cosmogenic neutrinos in Askaryan-based detectors benefit from computational speed, because scans of Askaryan parameter-space are required to match neutrino signals. The Askaryan field is derived from cascade equations verified with Geant4 simulations, and compared with prior numerical and semi-analytic calculations. Finally, instructive cases of the model are transformed from the Fourier domain to the time-domain. Next-generation in situ detectors like ARA and ARIANNA can use analytic time- domain signal models to search for correlations with event candidates.
Suborbifolds, quotients and transversality
Creators: name: Weilandt, Martin
Publisher: name: arXiv
Year: 2015
Subjects: subject: Geometric Topology (math.GT)
subject: Differential Geometry (math.DG)
subject: Metric Geometry (math.MG)
subject: FOS: Mathematics
subject: 57R18 (Primary), 58E40 (Secondary)

description: Inspired by work of Borzellino and Brunsden, we generalize the notion of a submanifold identifying a natural and sufficiently general condition which guarantees that a subset of an (effective) orbifold carries itself a canonical induced orbifold structure. We illustrate the strength of this approach generalizing typical constructions of submanifolds to the orbifold setting using embeddings, proper group actions and the idea of transversality.
description: 16 pages; minor corrections, relation to earlier suborbifold notions clarified; to appear in Topology and its Applications
Large $N$ matrix models for 3d ${\cal N}=2$ theories: twisted index, free energy and black holes
Creators: name: Hosseini, Seyed Morteza
name: Zaffaroni, Alberto
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We provide general formulae for the topologically twisted index of a general three-dimensional ${\cal N}\geq 2$ gauge theory with an M-theory or massive type IIA dual in the large $N$ limit. The index is defined as the supersymmetric path integral of the theory on $S^2\times S^1$ in the presence of background magnetic fluxes for the R- and global symmetries and it is conjectured to reproduce the entropy of magnetically charged static BPS AdS$_4$ black holes. For a class of theories with an M-theory dual, we show that the logarithm of the index scales indeed as $N^{3/2}$ (and $N^{5/3}$ in the massive type IIA case). We find an intriguing relation with the (apparently unrelated) large $N$ limit of the partition function on $S^3$. We also provide a universal formula for extracting the index from the large $N$ partition function on $S^3$ and its derivatives and point out its analogy with the attractor mechanism for AdS black holes.
description: 39 pages; v2: refs added; v3: typos removed
Community support discussions: FAIR implementation for NI4OS-Europe service providers
Creators: name: Athenodorou, Andreas
name: Sarkar, Arkopaul
name: Vassallo, Valentina
name: Artopoulos, Georgios
name: Cournia, Zoe
name: Zecevic, Zarko
name: Sevkusic, Milica
name: Khachidze, Irma
name: Risojevic, Vladimir
Publisher: name: Zenodo
Year: 2022
Subjects: FAIR data
service providers
FAIRification
semantics
metadata
ontologies

description: On Friday 29th April, NI4OS-Europe engaged in tailored discussions with service providers to answer their FAIR related questions and support their needs with respect to metadata, ontologies and semantics. In the 3hour interactive workshop, service providers had the opportunity to learn about best practices from the experts of the NI4OS-Europe semantics experts group and the OntoCommons projects as well as presented their services and get customised support.
Direct Heterojunction of Polycrystalline InP/Si by Hydride Vapor Phase Epitaxy for Photovoltaic Application
Creators: name: Sun, Y.T.
name: Metaferia, W.
name: Lourdudoss, S.
Publisher: name: WIP
Year: 2013
Subjects: MATERIAL STUDIES, NEW CONCEPTS, ULTRA-HIGH EFFICIENCY AND SPACE TECHNOLOGY
New Materials and Concepts for Cells

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 437-440
description: The direct heterojunction of polycrystalline InP on (001) and (111) silicon substrates was realized by indium assisted heteroepitaxy in a hydride vapor phase epitaxy system. The poly-InP growth under various temperatures and dopant incorporation were investigated. A coherent InP/Si interface and poly-InP growth rate > 20 μm/hour was observed by cross-sectional scanning electron microscopy (SEM). Effective n-type sulfur doping was revealed by stain-etching. The material properties of poly-InP were characterized by powder X-ray Diffraction (XRD), Atomic Force Microscopy (AFM), photoluminescence (PL), and Raman spectroscopy. A preferential crystalline orientation of (111) plane with substrate orientation dependent grain size was observed. Raman spectroscopy characterization at different locations on poly-InP surface reveals residual tensile strain in InP on silicon. High optical quality of poly-InP is revealed by PL measurement.
Distribution Networks Management with High Penetration of Photovoltaic Panels
Creators: name: Morais, H.
Publisher: name: WIP
Year: 2013
Subjects: PV SYSTEMS
PV System and Grid Integration Aspects

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 4337-4341
description: The photovoltaic solar panels penetration increases significantly in recent years in several European
countries, mainly in the low voltage and medium voltage networks supported by governmental policies and incentives.
Consequently, the acquisition and installation costs of PV panels decrease and the know–how increase significantly.
Presently is important the use of new management methodologies in distribution networks to support the growing
penetration of PV panels. In some countries, like in Germany and in Italy, the solar generation based in photovoltaic
panels supply 40% of the demand in some periods of sunny days, mainly in the weekends. In the present work are
technically analysed three different approaches to improve the number of PV systems in a distribution network, namely
the use of inductors/capacitors, the use of storage systems and the control of reactive power injected by inverters of PV
systems.
Local Histogram Matching for Efficient Optical Flow Computation Applied to Velocity Estimation on Pocket Drones
Creators: name: McGuire, Kimberly
name: de Croon, Guido
name: de Wagter, Christophe
name: Remes, Bart
name: Tuyls, Karl
name: Kappen, Hilbert
Publisher: name: arXiv
Year: 2016
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Autonomous flight of pocket drones is challenging due to the severe limitations on on-board energy, sensing, and processing power. However, tiny drones have great potential as their small size allows maneuvering through narrow spaces while their small weight provides significant safety advantages. This paper presents a computationally efficient algorithm for determining optical flow, which can be run on an STM32F4 microprocessor (168 MHz) of a 4 gram stereo-camera. The optical flow algorithm is based on edge histograms. We propose a matching scheme to determine local optical flow. Moreover, the method allows for sub-pixel flow determination based on time horizon adaptation. We demonstrate velocity measurements in flight and use it within a velocity control-loop on a pocket drone.
description: 7 pages, 10 figures, Changes: format changed one column to two columns, used url package for links
Stability of 3D Gaussian vortices in an unbounded, rotating, vertically-stratified, Boussinesq flow: Linear analysis
Creators: name: Mahdinia, Mani
name: Hassanzadeh, Pedram
name: Marcus, Philip S.
name: Jiang, Chung-Hsiang
Publisher: name: arXiv
Year: 2016
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The linear stability of three-dimensional (3D) vortices in rotating, stratified flows has been studied by analyzing the non-hydrostatic inviscid Boussinesq equations. We have focused on a widely-used model of geophysical and astrophysical vortices, which assumes an axisymmetric Gaussian structure for pressure anomalies in the horizontal and vertical directions. For a range of Rossby number ($-0.5 < Ro < 0.5$) and Burger number ($0.02 < Bu < 2.3$) relevant to observed long-lived vortices, the growth rate and spatial structure of the most unstable eigenmodes have been numerically calculated and presented as a function of $Ro-Bu$. We have found neutrally-stable vortices only over a small region of the $Ro-Bu$ parameter space: cyclones with $Ro \sim 0.02-0.05$ and $Bu \sim 0.85-0.95$. However, we have also found that anticyclones in general have slower growth rates compared to cyclones. In particular, the growth rate of the most unstable eigenmode for anticyclones in a large region of the parameter space (e.g., $Ro<0$ and $0.5 \lesssim Bu \lesssim 1.3$) is slower than $50$ turn-around times of the vortex (which often corresponds to several years for ocean eddies). For cyclones, the region with such slow growth rates is confined to $0
description: Revision submitted to Journal of Fluid Mechanics
Testing physical models for dipolar asymmetry: from temperature to k space to lensing
Creators: name: Zibin, J. P.
name: Contreras, D.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: One of the most intriguing hints of a departure from the standard cosmological model is a large-scale dipolar power asymmetry in the cosmic microwave background (CMB). If not a statistical fluke, its origins must lie in the modulation of the position-space fluctuations via a physical mechanism, which requires the observation of new modes to confirm or refute. We introduce an approach to describe such a modulation in k space and calculate its effects on the CMB temperature and lensing. We fit the k-space modulation parameters to Planck 2015 temperature data and show that CMB lensing will not provide us with enough independent information to confirm or refute such a mechanism. However, our approach elucidates some poorly understood aspects of the asymmetry, in particular that it is weakly constrained. Also, it will be particularly useful in predicting the effectiveness of polarization in testing a physical modulation.
description: 15 pages, 5 figures; max likelihood values corrected, conclusions unchanged; version published in Phys. Rev. D
programa del curso Fundamentos en Humanidades Digitales - otoño 2022
Creators: name: Melo Flórez, Jairo Antonio
Publisher: name: Zenodo
Year: 2022
Subjects: humanidades digitales
syllabus
digitalidad

description: El curso de fundamentos en humanidades digitales plantea la teoría y las prácticas básicas de ésta área con el propósito de identificar las habilidades necesarias para enfrentar la aplicación del saber humanístico en el tiempo de la digitalidad. Partimos de un concepto útil de humanidades digitales, que la entiende como la reacción de las artes y las ciencias humanas a la avalancha de la digitalidad, la datificación y la tecnologización de la sociedad. En este sentido, comprendemos que existen saberes, teorías y prácticas que dan cuenta del hacer de las humanidades hoy.
Large $N$ topologically twisted index: necklace quivers, dualities, and Sasaki-Einstein spaces
Creators: name: Hosseini, Seyed Morteza
name: Mekareeya, Noppadol
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper, we calculate the topological free energy for a number of ${\mathcal N} \geq 2$ Yang-Mills-Chern-Simons-matter theories at large $N$ and fixed Chern-Simons levels. The topological free energy is defined as the logarithm of the partition function of the theory on $S^2 \times S^1$ with a topological A-twist along $S^2$ and can be reduced to a matrix integral by exploiting the localization technique. The theories of our interest are dual to a variety of Calabi-Yau four-fold singularities, including a product of two asymptotically locally Euclidean singularities and the cone over various well-known homogeneous Sasaki-Einstein seven-manifolds, $N^{0,1,0}$, $V^{5,2}$, and $Q^{1,1,1}$. We check that the large $N$ topological free energy can be matched for theories which are related by dualities, including mirror symmetry and $\mathrm{SL}(2,\mathbb{Z})$ duality.
description: 34 pages, v2: refs added, improvement of section 5.1, published version; v3: typos removed
Electric dipole moment of the deuteron in the standard model with $NN - ΛN - ΣN$ coupling
Creators: name: Yamanaka, Nodoka
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We calculate the electric dipole moment (EDM) of the deuteron in the standard model with $|ΔS| =1$ interactions by taking into account the $NN - ΛN - ΣN$ channel coupling, which is an important nuclear level systematics. The two-body problem is solved with the Gaussian Expansion Method using the realistic Argonne $v18$ nuclear force and the $YN$ potential which can reproduce the binding energies of $^3_Λ$H, $^3_Λ$He, and $^4_Λ$He. The $|ΔS| =1$ interbaryon potential is modeled by the one-meson exchange process. It is found that the deuteron EDM is modified by less than 10\%, and the main contribution to this deviation is due to the polarization of the hyperon-nucleon channels. The effect of the $YN$ interaction is small, and treating $ ΛN$ and $ ΣN$ channels as free is a good approximation for the EDM of the deuteron.
description: 12 pages, 4 figures
Crystallographic Analysis of GexC1-X Film Deposited by RF Magnetron Sputtering for the Hot Carrier Solar Cells
Creators: name: Gupta, N.
name: Shrestha, S.
name: Conibeer, G.J.
name: Xia, H.
name: Puthen-Veetil, B.
Publisher: name: WIP
Year: 2013
Subjects: MATERIAL STUDIES, NEW CONCEPTS, ULTRA-HIGH EFFICIENCY AND SPACE TECHNOLOGY
New Materials and Concepts for Cells

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 423-426
description: The Hot carrier solar cell (HC-SC) is third generation photovoltaic concepts which have the potential
of achieving high efficiency. The HC-SC aims to tackle the major thermalization loss of single junction solar cell by
blocking the Klemens dacay and hence slowing down the carrier cooling. The hot carrier absorber is the essential
element of a HC-SC which relies on a material that has large phononic band gap to achieve this. It has been suggested
that bulk compound semiconductors with a large ratio of their constituent masses can have a large phonon gap
suitable for suppressing carrier cooling. Therefore, GeC could be a good candidate for hot carrier absorber due to a
large mass difference between carbon and germanium atoms. Moreover, both elements of GeC are relatively
abundant to allow mass manufacturing of solar cells. In this work, GeC films deposited using RF magnetron cosputtering
and its structure and compositional properties have been studied.
Development of Well-Aligned ZnO Nanorods as Photoelectrode for Dye-Sensitized Solar Cell Application
Creators: name: Li, X.
name: Pradeep, C.
name: Wang, D.
name: Kawaharumura, T.
name: Nitta, N.
name: Furuta, H.
name: Hatta, A.
name: Li, C.
Publisher: name: WIP
Year: 2013
Subjects: MATERIAL STUDIES, NEW CONCEPTS, ULTRA-HIGH EFFICIENCY AND SPACE TECHNOLOGY
New Materials and Concepts for Cells

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 434-436
description: A novel photoelectrode using vertical well-aligned ZnO nanorods was developed for improving the
efficiency of dye-sensitized solar cell. A novel reducing annealing method was applied to obtain the vertical wellaligned
ZnO nanorods from as-deposited ZnO film. The structural and optical properties of ZnO nanorods were
characterized. The feasibility of vertical well-aligned ZnO nanorods as photoanode in DSSC was investigated. The
efficiency of demonstrated ZnO-based DSSC was 2.89% with a fill factor 0.563.
Increasing PV Panels' Output with Flat Reflectors
Creators: name: Grech, M.
name: Mule'Stagno, L.
name: Yousif, C.
Publisher: name: WIP
Year: 2013
Subjects: PV SYSTEMS
PV System and Grid Integration Aspects

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 4294-4300
description: The output of photovoltaic (PV) modules is related to the solar radiation incident on their
surface. The immediate surroundings of the modules may reflect a considerable amount of radiation on to
them, thus affecting their performance and output. This paper explores ways of improving the output of
PV modules installed in Malta, with the aid of fixed flat plate reflectors installed in front of the modules.
This study focused on the effect that different types of reflective materials have on the PV modules’
output. Two sets of reflectors were studied. The first set consisted of reflectors that can be set at an angle
to the horizontal, while the second set emulates different flat roof surfaces. The output of PV modules was
measured and compared for each case. The results of this paper are derived from measurements taken
from October 2012 till September 2013. Results have so far shown that a potential increase of up to
13.2% may be achieved by aluminium reflectors.
PV Fire Hazard - Analysis and Assessment of Fire Incidents
Creators: name: Laukamp, H.
name: Bopp, G.
name: Grab, R.
name: Wittwer, C.
name: Häberlin, H.
name: V. Heeckeren, B.
name: Phillip, S.
name: Reil, F.
name: Schmidt, H.
name: Sepanski, A.
name: Thiem, H.
name: Vaassen, W.
Publisher: name: WIP
Year: 2013
Subjects: PV SYSTEMS
PV System and Grid Integration Aspects

description: 28th European Photovoltaic Solar Energy Conference and Exhibition; 4304-4311
description: This paper addresses an investigation of heat damages and fires of PV systems. Information on damage
cases was collected by an online-questionnaire, online research, literature research, by questioning technical experts and
from an insurance company´s files. Some 180 cases of fire and heat damage were found, where PV systems caused fires
affecting the PV system or its surroundings. A statistical analysis or these cases is given. Main reasons for fires were
component failures and installation errors. Especially in larger systems improper handling of aluminum cables caused
several fires. DC-switches were found to be critical and therefore laboratory testing was conducted. This testing of aged
DC switches found increased resistance and potential thermal damage. Operating the switches several times reduced the
resistance markedly. Inspection of older PV systems showed that bypass-diodes are reliable and pose a low risk for
reverse currents into strings. Recommendations to further improve system safety are given.