cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
SUSHEAT introduction in the Eurotherm Seminar Innovative solutions for thermal energy storage deployment
Creators: name: Laura Torres Gordo, Jerónimo Domingo
Publisher: name: Zenodo
Year: 2023
Subjects: heat pumps
solar thermal energy
photovoltaics
thermal energy storage (TES)

description: The SUSHEAT Horizon Europe project was introduced to the audience in the Europe´s Corner at the event. Grant Agreement No 101103552. Heat upgrade technologies are becoming increasingly relevant as one of the ways to meet the high thermal energy demand required by industry. SUSHEAT aims to develop and validate (via modelling and laboratory activities) innovative technological solutions that can untap the potential of hybrid renewable industrial heat upgrade systems to be fed into industrial processes on demand. This will contribute to a deep decarbonisation of the industrial sector which is currently powered by fossil fuels.
Modelling the Rossiter-McLaughlin Effect: Impact of the Convective Centre-to-Limb Variations in the Stellar Photosphere
Creators: name: Cegla, H. M.
name: Oshagh, M.
name: Watson, C. A.
name: Figueira, P.
name: Santos, N. C.
name: Shelyag, S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Observations of the Rossiter-McLaughlin (RM) effect provide information on star-planet alignments, which can inform planetary migration and evolution theories. Here, we go beyond the classical RM modelling and explore the impact of a convective blueshift that varies across the stellar disc and non-Gaussian stellar photospheric profiles. We simulated an aligned hot Jupiter with a 4 d orbit about a Sun-like star and injected centre-to-limb velocity (and profile shape) variations based on radiative 3D magnetohydrodynamic simulations of solar surface convection. The residuals between our modelling and classical RM modelling were dependent on the intrinsic profile width and v sin i; the amplitude of the residuals increased with increasing v sin i, and with decreasing intrinsic profile width. For slowly rotating stars the centre-to-limb convective variation dominated the residuals (with amplitudes of 10s of cm/s to ~1 m/s); however, for faster rotating stars the dominant residual signature was due a non-Gaussian intrinsic profile (with amplitudes from 0.5-9 m/s). When the impact factor was 0, neglecting to account for the convective centre-to-limb variation led to an uncertainty in the obliquity of ~10-20 degrees, even though the true v sin i was known. Additionally, neglecting to properly model an asymmetric intrinsic profile had a greater impact for more rapidly rotating stars (e.g. v sin i = 6 km/s), and caused systematic errors on the order of ~20 degrees in the measured obliquities. Hence, neglecting the impact of stellar surface convection may bias star-planet alignment measurements and consequently also theories on planetary migration and evolution.
description: Accepted to ApJ , 10 pages + 2 pages References/Appendix, 6 Figures + 1 Appendix Figure
Optimization of Transparent Conductive Oxides for Silicon-Perovskite Tandem Solar Cells
Creators: name: Sittinger, V.
name: King, H.
Publisher: name: WIP
Year: 2020
Subjects: Perovskites and Other Non-Silicon Materials, MJs and Tandems
Tandems

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 769-771
description: Using sputtering processes, Indium Tin Oxide and Indium Zinc Oxide films were developed for use in Perovskite-Silicon tandem solar cells as a TCO top-layer. Perovskite absorber materials have shown significant promise in the last 10 years for use alone or in tandem cell configurations. However, due to increased temperature instability when compared with their silicon counterparts, new processes and materials must be developed for the surrounding contact layers in order to maximize both cell performance and lifetime. For this purpose, ITO and IZO films with the temperature limitations of the perovskite absorber in mind (Tmax < 100 °C) were developed. The optimum process parameters are determined by optical and conductivity measurements.
More Realistic Consideration of Backsheets Coefficient of Thermal Expansion on Thermomechanics of PV Modules
Creators: name: Romer, P.
name: Oreski, G.
name: Beinert, A.J.
name: Neuhaus, H.
name: Mittag, M.
Publisher: name: WIP
Year: 2020
Subjects: Photovoltaic Modules and BoS Components
PV Module Design, Manufacture, Performance and Reliability

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 772-776
description: This paper deals with the effect of anisotropic and negative thermal expansion of polymeric backsheets. Even though these effects are well known in polymer engineering, so far they have not been considered in FEM simulation of PV modules. Therefore, we investigate the influence of those effects on the thermomechanical stress in PV modules after lamination and for mechanical load as well as thermal cycling. With the anisotropic partially negative coefficient of thermal expansion (CTE) the general shape of the third principal stress after lamination changes to a more asymmetric one. The probability of cell fracture after mechanical loading changes with the compressive stress after lamination. It ranges from 5 % for the AAA backsheet up to 55 % for the APA. This leads to the conclusion that the anisotropic, partially negative CTE of backsheets is not negligible and should be considered in all thermomechanical simulations of PV modules.
Core momentum distribution in two-neutron halo nuclei
Creators: name: Souza, Lucas A.
name: Bellotti, Filipe F
name: Yamashita, Marcelo T.
name: Frederico, Tobias
name: Tomio, Lauro
Publisher: name: arXiv
Year: 2015
Subjects: subject: Nuclear Theory (nucl-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The core momentum distribution of a weakly-bound neutron-neutron-core exotic nucleus is computed within a renormalized zero-range three-body model, with interactions in the s-wave channel. The halo wave-function in momentum space is obtained by using as inputs the two-body scattering lengths and the two-neutron separation energy. The core momentum densities are computed for $^{11}$Li, $^{14}$Be $^{20}$C and $^{22}$C. The model describes the experimental data for $^{11}$Li, $^{14}$Be and to some extend $^{20}$C. The recoil momentum distribution of the $^{20}$C from the breakup of $^{22}$C nucleus is computed for different two-neutron separation energies, and from the comparison with recent experimental data the two-neutron separation energy is estimated in the range $100\lesssim S_{2n}\lesssim 400$ KeV. The recoil momentum distribution depends weakly on the neutron-$^{20}$C scattering length, while the matter radius is strongly sensitive to it. The expected universality of the momentum distribution width is verified by also considering excited states for the system.
description: 16 pages, 6 figures
Pressure-resistant intermediate valence in Kondo insulator SmB6
Creators: name: Butch, Nicholas P.
name: Paglione, Johnpierre
name: Chow, Paul
name: Xiao, Yuming
name: Marianetti, Chris A.
name: Booth, Corwin H.
name: Jeffries, Jason R.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Resonant x-ray emission spectroscopy (RXES) was used to determine the pressure dependence of the f-electron occupancy in the Kondo insulator SmB6. Applied pressure reduces the f-occupancy, but surprisingly, the material maintains a significant divalent character up to a pressure of at least 35 GPa. Thus, the closure of the resistive activation energy gap and onset of magnetic order are not driven by stabilization of an integer valent state. Over the entire pressure range, the material maintains a remarkably stable intermediate valence that can in principle support a nontrivial band structure.
LCA of Perovskite on Si Tandem PV Modules at Industrial Scale
Creators: name: Salas Redondo, C.
name: Blanco, C.F.
name: Alvino, K.
name: Peijnenburg, W.J.G.M.
name: Oberbeck, L.
Publisher: name: WIP
Year: 2020
Subjects: Perovskites and Other Non-Silicon Materials, MJs and Tandems
Tandems

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 754-764
description: For the first time a comprehensive life cycle assessment (LCA) is reported of a large-area perovskite/Si tandem photovoltaic (PV) module of about 2 m², with an assumed power conversion efficiency of 30%, 30 years lifetime and an annual degradation of 0.5%, manufactured in a 1 GW production plant. By means of the LCA method, we calculate the contribution to the International Reference Life Cycle Data System (ILCD) impact categories associated with a perovskite/Si tandem PV system compared with a passivated emitter and rear cell (PERC) used as reference, considering a functional unit of 1 kWh of generated direct current electrical energy from the tandem module over its lifetime. It was found that the most significant hotspots are the silicon wafer production and the slanted-roof installation (mounting system, inverter, and electric installation). Overall, the impact contributions to the environment caused by the perovskite sub-module are below 1% throughout all the ILCD categories in focus, i.e. climate change, freshwater ecotoxicity, water resource depletion and human toxicity. Even the contribution of lead to human toxicity is just about 0.01%. For all the impacts assessed, the perovskite/Si tandem shows a decrease of between 17-20% of the contributions to each impact category compared to the PERC-module based reference PV system, if the Si bottom submodule has an initial cell efficiency of at least 22% with 1% cell-to-module (CTM) loss, and the perovskite top submodule has a minimum initial cell efficiency of 18% with at most 5% CTM loss, transmittance near IR region larger than 80% and at most 10% annual transmittance loss. The key result found in this work is the relevance of the performance and reliability of the PV system to achieve lower environmental impacts. A comparison between optimistic, realistic, and pessimistic scenarios was performed to tackle this matter: in the worst-case scenario, the environmental impact of the PV tandem system would have a general 50% increase throughout all ILCD impact categories against the realistic case, whereas in the optimistic scenario, the results suggest a reduction of 46% to the global impact contributions, compared to the realistic scenario.
Sequential Silicon Surface Melting and Atmospheric Pressure Phosphorus Doping for Crystalline Tunnel Junction Formation in Silicon/Perovskite Tandem Solar Cells
Creators: name: Gaspar, G.
name: Canhoto Cardoso, J.
name: Costa, I.
name: Guerra, A.
name: Viana, A.S.
name: Jorge, M.E.M.
name: Vilhena, D.
name: Pera, D.
name: Almeida Silva, J.
name: Vallêra, A.M.
name: Vines, L.
name: Almeida Serra, J.M.
name: Lobato, K.
Publisher: name: WIP
Year: 2020
Subjects: Perovskites and Other Non-Silicon Materials, MJs and Tandems
Tandems

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 765-768
description: In monolithically integrated 2-terminal silicon/perovskite tandem solar cells, one of the critical steps is the formation of the layer(s) that interconnects the two sub-cells. Of the range of possibilities for monolithic integration, crystalline silicon tunnel junctions are a potential candidate. The crystalline tunnel junction has the advantage of transparency whilst also withstanding high temperature steps which may be required to form the perovskite sub-cell on top of the silicon sub-cell. Here, we present our recent scalable setup that has its core based on the gas immersion laser doping technique (GILD). We have adapted it to reach high speed rastering of the laser spot over large areas to dope silicon wafers with the aim of forming a tunnel junction, i.e. shallow doping with an abrupt doping profile. Morphological analysis of the laser processed samples after parameters tuning has resulted in the unequivocal shallow melting while faceted structures are left to solidify on the surface. Shallow phosphorus depth profiles (< 1 μm) with an abrupt concentration drop were also measured in the processed samples. We observed that the number of scans has a predominate impact on the profiles’ form.
El blockchain como facilitador de la economía circular en la accesibilidad a los medios.
Creators: name: Orero, Pilar
Publisher: name: Zenodo
Year: 2023
Subjects: Green Deal, GreenSCENT, Horizon2020, UX, Accessibility, Diversity, Inclusion, Blockchain, Media Accessibility

description: This presentation aims to explore the role of blockchain technology as a facilitator of the circular economy in the context of media accessibility. By examining the potential for blockchain to promote sustainability and foster more equitable distribution of resources, the presentation demonstrates its value as a tool for driving positive change within the media industry.
Nanostructured Photoelectrodes Based on Yttria Stabilized Zirconia: Applications to Perovskite/c-Si Tandem Solar Cells
Creators: name: Vildanova, M.F.
name: Nikolskaia, A.B.
name: Kozlov, S.S.
name: Karyagina, O.K.
name: Alexeeva, O.V.
name: Shevaleevskiy, O.I.
Publisher: name: WIP
Year: 2020
Subjects: Perovskites and Other Non-Silicon Materials, MJs and Tandems
Tandems

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 750-753
description: A series of nanostructured layered photoelectrodes based on Y2O3 stabilized ZrO2 (Zr:Y) with varied Y2O3 concentration was prepared and used for constructing perovskite solar cells (PSCs). The structural, optical and energy characteristics of the photoelectrodes were investigated. The studies of the photovoltaic (PV) performance for the PSCs with different types of Zr:Y photoelectrodes and the device architecture of FTO/cTiO2/Zr:Y/CH3NH3PbI3/PTAA/PEDOT:PSS/FTO were provided. The results obtained demonstrate a possibility of PV application of the nanostructured oxide materials with a very wide bandgap exceeding 5 eV. The prepared devices were used for constructing of four-terminal tandem PSC/c-Si solar cell, in which PSC was used as a top sub-cell. By tuning the optical and structural parameters of Zr:Y photoelectrodes we have found the optimal parameters of tandem PSC/cSi solar cell for reaching the best performance under AM.1.5G illumination conditions.
Evaluation Emerging PV Performance under Energy Harvesting for Indoor Lighting Applications
Creators: name: Long, Y.-S.
name: Tsai, M.-A.
name: Wu, T.-C.
name: Hsu, S.-T.
Publisher: name: WIP
Year: 2020
Subjects: Perovskites and Other Non-Silicon Materials, MJs and Tandems
Organic and Dye-Sensitised

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 742-746
description: The measured I-V hysteresis is complicated by the vast array of different materials, lighting sources, and device architectures. In our study, we used RTOS method for I-V then the results showed better accuracy by eliminating in real time the acceptance effect. We also used this method to compare emerging PV cells with the latter cells exhibited promising power conversion efficiency and no hysteresis behavior under indoor lighting simulator. In this study, we defined a performance ratio to compare between indoor lighting and solar and the results will be show different performance trend for the different type PV in indoor/outdoor, which depends on device. That’s will be shown what’s type PV have the energy harvesting for indoor lighting.
Testing General Relativity's No-Hair Theorem with X-Ray Observations of Black Holes
Creators: name: Hoormann, Janie K.
name: Beheshtipour, Banafsheh
name: Krawczynski, Henric
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Despite its success in the weak gravity regime, General Relativity (GR) has yet to be verified in the regime of strong gravity. In this paper, we present the results of detailed ray tracing simulations aiming at clarifying if the combined information from X-ray spectroscopy, timing, and polarization observations of stellar mass and supermassive black holes can be used to test GR's no-hair theorem. The latter states that stationary astrophysical black holes are described by the Kerr-family of metrics with the black hole mass and spin being the only free parameters. We use four "non-Kerr metrics", some phenomenological in nature and others motivated by alternative theories of gravity, and study the observational signatures of deviations from the Kerr metric. Particular attention is given to the case when all the metrics are set to give the same Innermost Stable Circular Orbit (ISCO) in quasi-Boyer Lindquist coordinates. We give a detailed discussion of similarities and differences of the observational signatures predicted for BHs in the Kerr metric and the non-Kerr metrics. We emphasize that even though some regions of the parameter space are nearly degenerate even when combining the information from all observational channels, X-ray observations of very rapidly spinning black holes can be used to exclude large regions of the parameter space of the alternative metrics. Although it proves difficult to distinguish between the Kerr and non-Kerr metrics for some portions of the parameter space, the observations of very rapidly spinning black holes like Cyg X-1 can be used to rule out large regions for several black hole metrics.
description: 10 pages, 10 figures, accepted for publication in PRD
Promising Materials for High Efficiency Dual Junction Solar Cell Directly Grown on Silicon
Creators: name: Micha, D.N.
Publisher: name: WIP
Year: 2020
Subjects: Perovskites and Other Non-Silicon Materials, MJs and Tandems
Tandems

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 747-749
description: Multijunction solar cells on Si are a good candidate to low-cost / high-efficiency solar cells. Several innovative technologies to integrate III-V semiconductors to Si enabled efficiencies higher than 35%, but there is much room for improvements. In this work, results of a theoretical study on the power conversion efficiency of series connected Si-based dual junction solar cells are presented, pointing out promising bandgap energies, and hence materials, to compose highly efficient devices. In the used approach, a modification in the detailed balance model was performed to represent more realistic solar cells, including optical losses through the front side reflectivity and recombination losses through the external radiative efficiency of the junctions.
Design of a biocatalytic flow reactor based on hierarchically structured monolithic silica for producing galactooligosaccharides (GOSs)
Creators: name: Dejoma, Riccardo
name: Buscemi, Andrea
name: Cutrona, Emilio
name: Shahgaldian, Patrick
Publisher: name: Schweizerische Chemische Gesellschaft
Year: 2023
Subjects: subject: 500 - Naturwissenschaften und Mathematik

description: Climate change mitigation requires the development of greener chemical processes. In this context, biocatalysis is a pivotal key enabling technology. The advantages of biocatalysis include lower energy consumption levels, reduced hazardous waste production and safer processes. The possibility to carry out biocatalytic reactions under flow conditions provides the additional advantage to retain the biocatalyst and to reduce costly downstream processes. Herein, we report a method to produce galactooligosaccharides (GOSs) from a largely available feedstock (i.e. lactose from dairy production) using a flow reactor based on hierarchically structured monolithic silica. This reactor allows for fast and efficient biotransformation reaction in flow conditions.
High Efficiency Inverted Polymer Solar Cells Fabricated Based on ZnO-ETL Utilizing Spray Pyrolysis Technique
Creators: name: Moustafa, E.
name: Sánchez López, J.G.
name: Marsal Garví, L.F.
name: Pallarès Marzal, J.
Publisher: name: WIP
Year: 2020
Subjects: Perovskites and Other Non-Silicon Materials, MJs and Tandems
Organic and Dye-Sensitised

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 738-741
description: In this research work, significant progress has been achieved to fabricate efficient inverted polymer solar cells (iPSCs) using simple and low cost spray pyrolysis (SP) technique to deposit a thin film of ZnO as electron transporting layer (ETL). The deposition parameters of the ZnO films by the SP technique have been studied to obtain the optimal conditions that allow achieving high performance of the fabricated iPSCs. Also, the effect of different thicknesses (number of spraying running cycles) with the SP technique on the iPSCs performance has been investigated. Moreover, a standard iPSCs fabricated by spin coating technique has been used as a reference. Four different numbers of spraying running cycles of ZnO were performed, namely, 3R, 5R, 7R and 9R. As the number of running cycles increases the current density of the cells increases and the series resistance decreases. In addition, the 7R-SP iPSCs have showed the best cells performance compared to the others 3R, 5R and 9R samples. At the same time, the performance of the 7R-SP iPSCs was quite similar to the reference samples fabricated by the SC technique. Hence, this promising spray pyrolysis technique might be a breakthrough forward step for the commercialization of inverted polymer solar cell based on mass production as well the probability of improving its efficiency.
Preliminary Study of the Role of Fluorinated Phthalocyanines as a Third Component in Ternary Organic Solar Cells
Creators: name: Torimtubun, A.A.A.
name: Follana-Berná, J.
name: Sastre-Santos, A.
name: Pallarès Marzal, J.
name: Marsal Garví, L.F.
Publisher: name: WIP
Year: 2020
Subjects: Perovskites and Other Non-Silicon Materials, MJs and Tandems
Organic and Dye-Sensitised

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 728-731
description: The novel small-molecule materials, fluorinated zinc-based phthalocyanine (ZnPcF48) and fluorinated copper-based phthalocyanine (CuPcF48), are designed, synthesized, and incorporated as the third component in ternary organic solar cells (TOSCs). Ternary bulk heterojunction blends consisting of donor polymer poly[4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-b;4,5-b´] dithiophene-2,6-diyl-alt-(4-(2-ethylhexyl)-3-fluorothieno[3,4-b]-thiophene)-2-carboxylate-2,6-diyl] (PTB7-Th), fullerene small-molecule acceptor [6,6]-phenyl-C70-butyric acid methyl ester (PC70BM) and different phthalocyanine family small-molecule acceptors were formulated to fabricate TOSCs with a device architecture of ITO/PFN/Active layer/V2O5/Ag. A 34% improved power conversion efficiency (PCE) is obtained with CuPcF48 as a third component with the maximum PCE of 9.82%, which is higher than those of binary reference devices with the PCE of 6.91%.
Research data management for bioimaging: the 2021 NFDI4BIOIMAGE community survey - Extended Data 2 - Questionnaire
Creators: name: Schmidt, Christian
name: Hanne, Janina
name: Moore, Josh
name: Meesters, Christian
name: Ferrando-May, Elisa
name: Weidtkamp-Peters, Stefanie
Publisher: name: Zenodo
Year: 2022
Subjects: Research data management
bioimaging
microscopy
community survey
FAIR principles

description: This document provides extended, supplementary data and information to the manuscript "Research data management for bioimaging: the 2021 NFDI4BIOIMAGE community survey" by Schmidt C., Hanne J, Moore J, Meesters C, Ferrando-May E, Weidtkamp-Peters S, and members of the NFDI4BIOIMAGE initiative. [version 1; peer review: awaiting peer review] F1000Research 2022, 11:638, https://doi.org/10.12688/f1000research.121714.1 This extended data includes: - The questionnaire, annotated with question identifiers and comments
description: {"references": ["\"Research data management for bioimaging: the 2021 NFDI4BIOIMAGE community survey\" by Schmidt C., Hanne J, Moore J, Meesters C, Ferrando-May E, Weidtkamp-Peters S, and members of the NFDI4BIOIMAGE initiative. [version 1; peer review: awaiting peer review] F1000Research 2022, 11:638,\u00a0https://doi.org/10.12688/f1000research.121714.1"]}
Characterization of PEDOT:PSS Functionalized by Dimethyl Sulfoxide and Triton X-100 and TiO2 Nanoparticles
Creators: name: Yaseen, A.
name: Vázquez-López, A.
name: Maestre, D.
name: Ramírez-Castellanos, J.
name: Marstein, E.S.
name: Karazhanov, S.Z.
name: Cremades, A.
Publisher: name: WIP
Year: 2020
Subjects: Perovskites and Other Non-Silicon Materials, MJs and Tandems
Organic and Dye-Sensitised

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 732-737
description: In this work poly(3, 4-ethylenedioxythiophene)/poly(styrenesulfonate) (PEDOT:PSS) dispersed in solvent (5wt.% Dimethyl sulfoxide DMSO & 0.1wt.% Triton X-100) has been studied in pure form and when functionallized with SnO nanoparticles. A preliminary characterization of bare PEDOT:PSS and romarchite SnO nanoparticles synthesized by hydrolysis were firstly carried out. PEDOT:PSS was deposited on FZ n-Si by spin coating method. The influence of a piranha pre-treatment on the Si surface has been evaluated in this work, as well as the effects due to the presence of SnO nanoparticles in the polymer. After achieving good adhesion and passivation of Si surface, the heterostructure has been characterized systematically by means of Raman spectroscopy using a He-Cd (l = 325 nm) laser as excitation source, atomic force microscopy (AFM), scanning electron microscopy (SEM) and photoluminescence (PL) spectra, and PL image. Spatial homogeneity of the film composition on surface has been achieved. Uniform defect distribution and presence of charged defects, material quality and vibrational structure have been studied. PEDOT:PSS thin film was obtained through solution process which involves adding a solvent additive and/or conducting post treatment at low temperatures. The film was obtained by static spin coating method on a n-type silicon substrate, followed by annealing of the film at 120 oC for 10-15 min. The achieved PEDOT:PSS layer thickness was around to be ~100 nm with the average surface roughness of 3:5±0:5 nm measured by AFM. Charge carrier lifetime measured by PL-machine was found out to be between 264-275 μs. By four probe measurements the sheet resistance was found out to be 338 Ω/.
Letter from Sir William Orpen to Lady Beatrice Glenavy (Or-02)
Creators: name: Orpen, William, Sir, 1878-1931
Publisher: name: University of Victoria Libraries
Year: 2021
Subjects: subject: Painters--Correspondence
valueUri: http://id.worldcat.org/fast/1050538
subject: Orpen, William, Sir, 1878-1931
valueUri: http://id.worldcat.org/fast/78887
subject: Glenavy, Beatrice Moss Campbell, Baroness, 1883-1970
valueUri: http://id.worldcat.org/fast/2012667
subject: Painters--Biography
valueUri: http://id.worldcat.org/fast/1050534

description: One of a collection of 36 letters all illustrated with ink or pencil sketches. Most are addressed to "Bridgit" from "Dijit". Sketch of the man who bought one of Orpen's artworks.
On The Continuous Steering of the Scale of Tight Wavelet Frames
Creators: name: Püspöki, Zsuzsanna
name: Ward, John Paul
name: Sage, Daniel
name: Unser, Michael
Publisher: name: arXiv
Year: 2015
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: In analogy with steerable wavelets, we present a general construction of adaptable tight wavelet frames, with an emphasis on scaling operations. In particular, the derived wavelets can be "dilated" by a procedure comparable to the operation of steering steerable wavelets. The fundamental aspects of the construction are the same: an admissible collection of Fourier multipliers is used to extend a tight wavelet frame, and the "scale" of the wavelets is adapted by scaling the multipliers. As an application, the proposed wavelets can be used to improve the frequency localization. Importantly, the localized frequency bands specified by this construction can be scaled efficiently using matrix multiplication.
Funktion, Stellung und Bedeutung des Heiligen Stuhls im internationalen Recht
Creators: name: Ciprotti, Pio
Publisher: name: Concilium
Year: 1970

description: Concilium, Bd. 6 Nr. 10 (1970): Concilium: Internationale Zeitschrift für Theologie, Band 6, Heft 10
Letter from Sir William Orpen to Lady Beatrice Glenavy (Or-18/Or-19)
Creators: name: Orpen, William, Sir, 1878-1931
Publisher: name: University of Victoria Libraries
Year: 2021
Subjects: subject: Painters--Correspondence
valueUri: http://id.worldcat.org/fast/1050538
subject: Orpen, William, Sir, 1878-1931
valueUri: http://id.worldcat.org/fast/78887
subject: Glenavy, Beatrice Moss Campbell, Baroness, 1883-1970
valueUri: http://id.worldcat.org/fast/2012667
subject: Painters--Biography
valueUri: http://id.worldcat.org/fast/1050534

description: One of a collection of 36 letters all illustrated with ink or pencil sketches. Most are addressed to "Bridgit" from "Dijit". Orpen encourages Beatrice to keep writing letters, and he promises to publish them after she's gone. Orpen's drawing depicting a "usual afternoon" in London, of him and two fashionably dressed women on either arm.
A conjuntura brasileira da Preservação Digital de Objetos Sociais
Creators: name: Salustiano, Skrol
name: Gouveia, Fábio
Publisher: name: Zenodo
Year: 2022

description: Apresentação realizada na sessão Pecha Kucha IV da 13ª Conferência Lusófona de Ciência Aberta, formato híbrido, de 10 a 12 de outubro de 2022.
A Low-Temperature X-Ray Diffraction Study of the Cu2ZnSnSe4 Thin Films on a Mo Foil Substrate
Creators: name: Stanchik, A.V.
name: Chumak, V.A.
name: Gremenok, V.F.
name: Baraishuk, S.M.
name: Shoukavaya, T.V.
Publisher: name: WIP
Year: 2020
Subjects: Perovskites and Other Non-Silicon Materials, MJs and Tandems
CI(G)S, CdTe and Related Thin Films

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 722-724
description: The Zn-rich and Cu-poor Cu2ZnSnSe4 (CZTSe) thin films were produced on flexible Mo foil by the three-step process. The XRD analysis demonstrates that the film mainly consists of CZTSe tetragonal phase and can contained ZnSe secondary phase. In addition, there are reflections of Mo and MoSe2. It was found that the crystal structure of the CZTSe films deposited on a Mo foil substrate was stable at low temperatures. The lattice parameters a and c are linearly decreasing in rang 5.707–5.637 and 11.394–11.298 Å, respectively, with a change in the temperature of the X-ray measurements from the 300 to 100 K. The thermal expansion coefficient is 9.87 × 10–6 K–1.
Quantum gravitational interaction between a polarizable object and a boundary
Creators: name: Hu, Jiawei
name: Yu, Hongwei
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the interaction caused by quantum gravitational vacuum fluctuations between a gravitationally polarizable object and a gravitational boundary, and find a position-dependent energy shift of the object, which induces a force in close analogy to the Casimir-Polder force in the electromagnetic case. For a Dirichlet boundary, the explicit form of the quantum gravitational potential for the polarizable object in its ground-state is worked out and is found to behave like $z^{-5}$ in the near regime, and $z^{-6}$ in the far regime, where $z$ is the distance to the boundary. Taking a Bose-Einstein condensate as a gravitationally polarizable object, we find that the relative correction to the radius caused by fluctuating quantum gravitational waves in vacuum is of order $10^{-21}$. Although far too small to observe in comparison with its electromagnetic counterpart, it is nevertheless of the order of the gravitational strain caused by a recently detected black hole merger on the arms of the LIGO.
description: 11 pages, no figures
An efficient and portable SIMD algorithm for charge/current deposition in Particle-In-Cell codes
Creators: name: Vincenti, H.
name: Lehe, R.
name: Sasanka, R.
name: Vay, J-L.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: In current computer architectures, data movement (from die to network) is by far the most energy consuming part of an algorithm (10pJ/word on-die to 10,000pJ/word on the network). To increase memory locality at the hardware level and reduce energy consumption related to data movement, future exascale computers tend to use more and more cores on each compute nodes ("fat nodes") that will have a reduced clock speed to allow for efficient cooling. To compensate for frequency decrease, machine vendors are making use of long SIMD instruction registers that are able to process multiple data with one arithmetic operator in one clock cycle. SIMD register length is expected to double every four years. As a consequence, Particle-In-Cell (PIC) codes will have to achieve good vectorization to fully take advantage of these upcoming architectures. In this paper, we present a new algorithm that allows for efficient and portable SIMD vectorization of current/charge deposition routines that are, along with the field gathering routines, among the most time consuming parts of the PIC algorithm. Our new algorithm uses a particular data structure that takes into account memory alignement constraints and avoids gather/scatter instructions that can significantly affect vectorization performances on current CPUs. The new algorithm was successfully implemented in the 3D skeleton PIC code PICSAR and tested on Haswell Xeon processors (AVX2-256 bits wide data registers). Results show a factor of $\times 2$ to $\times 2.5$ speed-up in double precision for particle shape factor of order $1$ to $3$. The new algorithm can be applied as is on future KNL (Knights Landing) architectures that will include AVX-512 instruction sets with 512 bits register lengths (8 doubles/16 singles).
description: 36 pages, 5 figures
AI as a Catalyst in Entomological Research by Simplifying Species Identification
Creators: name: Shirali, Hossein
name: Wührl, Lorenz
name: Klug, Nathalie
Publisher: name: Karlsruher Institut für Technologie (KIT)
Year: 2024
Subjects: Artificial Intelligence (AI)
Entomology
Biodiversity studies
Species identification

description: Artificial Intelligence (AI) is reshaping our understanding of the natural world, bringing transformative changes to entomology and biodiversity studies. The emergence of user-friendly AI-driven applications, recognizable in daily life through tools that identify various species from images or sounds, marks a new era in entomological research. These advancements facilitate research by citizen scientists and professionals alike by simplifying species identification. However, the potential of AI extends far beyond the familiar terrains of the global North, where it has predominantly been utilized due to earlier access to advanced technologies. In this presentation, we delve into how AI, synergized with innovative and cost-effective technologies like DIY microscopes, is breaking barriers in biodiversity research, especially in resource-limited settings. This novel approach empowers researchers to efficiently assess species diversity, abundance, and biomass, offering faster and more cost-effective ways to understand ecological patterns and change. Our discussion also includes a specific focus on the application of these AI techniques for analyzing bulk samples from pan-traps and Malaise traps, highlighting their utility in classifying the most common species encountered in these traps. Additionally, at the Karlsruhe Institute of Technology, we are collaborating with colleagues from the Center for Integrative Biodiversity Discovery at the Natural History Museum Berlin to address biological problems with AI methods and engineering tools. Overall, our discussion aims to illuminate the broad capabilities of AI in entomology, underscoring its role as a pivotal tool in global biodiversity conservation and study.
Bilayer graphene under pressure: Electron-hole Symmetry Breaking, Valley Hall Effect, and Landau Levels
Creators: name: Munoz, F
name: Collado, H. P. Ojeda
name: Usaj, Gonzalo
name: Sofo, Jorge O.
name: Balseiro, C. A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The electronic structure of bilayer graphene under pressure develops very interesting features with an enhancement of the trigonal warping and a splitting of the parabolic touching bands at the K point of the reciprocal space into four Dirac cones, one at K and three along the T symmetry lines. As pressure is increased, these cones separate in reciprocal space and in energy, breaking the electron-hole symmetry. Due to their energy separation, their opposite Berry curvature can be observed in valley Hall effect experiments and in the structure of the Landau levels. Based on the electronic structure obtained by Density Functional Theory, we develop a low energy Hamiltonian that describes the effects of pressure on measurable quantities such as the Hall conductivity and the Landau levels of the system.
description: 11 pages, 9 figures
Aplicación de la Espectrofotometría Infrarroja con Transformada Rápida de Fourier al Estudio de la Transferencia de Masa Inducida por Gradientes de Temperaturas en Materiales Porosos No Saturados
Creators: name: Vega Mayorga, Sergio Ivan
Publisher: name: Universidad Nacional de Ingeniería (UNI)
Year: 1991

description: El siguiente trabajo consiste en la aplicación de la espectrofotometría infrarroja con transformada rápida de Fourier a un ejemplo especifico de transferencia de masa para determinar el reordenamiento de concentraciones en un sistema constituido por un lecho poroso conteniendo una mezcla ternaria de solventes orgánicos cuando a este se le impone un gradiente de temperaturas. En la parte experimental, un gradiente de temperatura fue aplicado longitudinalmente a un cilindro de 10 cm de altura relleno con esferas de cristal y una mezcla de solventes orgánicos de composición inicial uniforme conocida. Una vez alcanzado el estado estacionario, el sistema fue desmontado para analizar la redistribución de las concentraciones en las diferentes secciones con ayuda de un interferómetro infrarrojo. El sistema liquido utilizado fue una mezcla ternaria de Etanol, 2-Butanona y Tolueno. Para enfrentar el tema fue necesario referirse a la teoría especifica del equipo que se utilizó para las mediciones, así como a la teoría relacionada con la transferencia de calor y masa en sólidos porosos no saturados conteniendo mezclas de solventes orgánicos, particularmente la transferencia de masa inducida por gradientes de temperatura aplicados al sólido. A través de un modelo matemático desarrollado para describir este último fenómeno, se compararon los resultados teóricos con los obtenidos por experimentación directa a dos composiciones iniciales diferentes de la mezcla, llegándose a la conclusión de que el modelo describe cualitativamente la redistribución de concentraciones. Cuantitativamente, sin embargo, se encontraron desviaciones considerables entre los resultados experimentales y teóricos. Esto puede ser atribuido a importantes pérdidas por evaporación de solventes producidas principalmente al tomar la muestra y que no pudieron ser evitadas en el presente diseño experimental. Métodos para perfeccionar el diseño experimental y determinar separadamente los parámetros del modelo son sugeridos.
Contagion processes on the static and activity driven coupling networks
Creators: name: Lei, Yanjun
name: Jiang, Xin
name: Guo, Quantong
name: Ma, Yifang
name: Li, Meng
name: Zheng, Zhiming
Publisher: name: arXiv
Year: 2015
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Social and Information Networks (cs.SI)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: The evolution of network structure and the spreading of epidemic are common coexistent dynamical processes. In most cases, network structure is treated either static or time-varying, supposing the whole network is observed in a same time window. In this paper, we consider the epidemic spreading on a network consisting of both static and time-varying structures. At meanwhile, the time-varying part and the epidemic spreading are supposed to be of the same time scale. We introduce a static and activity driven coupling (SADC) network model to characterize the coupling between static (strong) structure and dynamic (weak) structure. Epidemic thresholds of SIS and SIR model are studied on SADC both analytically and numerically with various coupling strategies, where the strong structure is of homogeneous or heterogeneous degree distribution. Theoretical thresholds obtained from SADC model can both recover and generalize the classical results in static and time-varying networks. It is demonstrated that weak structures can make the epidemics break out much more easily in homogeneous coupling but harder in heterogeneous coupling when keeping same average degree in SADC networks. Furthermore, we show there exists a threshold ratio of the weak structure to have substantive effects on the breakout of the epidemics. This promotes our understanding of why epidemics can still break out in some social networks even we restrict the flow of the population.
No-Scale $μ$-Term Hybrid Inflation
Creators: name: Wu, Lina
name: Hu, Shan
name: Li, Tianjun
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: To solve the fine-tuning problem in $μ$-Term Hybrid Inflation, we will realize the supersymmetry scenario with the TeV-scale supersymmetric particles and intermediate-scale gravitino from anomaly mediation, which can be consistent with the WMAP and Planck experiments. Moreover, we for the first time propose the $μ$-term hybrid inflation in no-scale supergravity. With four Scenarios for the $SU(3)_C\times SU(2)_L\times SU(2)_R\times U(1)_{B-L}$ model, we show that the correct scalar spectral index $n_s$ can be obtained, while the tensor-to-scalar ratio $r$ is prediced to be tiny, about $10^{-10}-10^{-8}$. Also, the $SU(2)_R\times U(1)_{B-L}$ symmetry breaking scale is around $10^{14}$ GeV, and all the supersymmetric particles except gravitino are around TeV scale while gravitino mass is around $10^{9-10}$ GeV. Considering the complete potential terms linear in $S$, we for the first time show that the tadpole term, which is the key for such kind of inflationary models to be consistent with the observed scalar spectral index, vanishes after inflation. Thus, to obtain the $μ$ term, we need to generate the supersymmetry breaking soft term $A^{S ΦΦ'}_κ κS ΦΦ'$ due to $A^{S ΦΦ'}_κ=0 $ in no-scale supergravity, where $Φ$ and $Φ'$ are vector-like Higgs fields at high energy. We show that the proper $A^{S ΦΦ'}_κ κS ΦΦ'$ term can be obtained in the M-theory inspired no-scale supergravity. We also point out that $A^{S ΦΦ'}_κ$ around 700 GeV can be generated via the renormalization group equation running from string scale.
description: 15 pages, 4 figures; v2: references added
Organic Solar Cells Based on an Anthradithiophene Conjugated Polymer
Creators: name: Bianchi, G.
name: Melchiorre, F.
name: Carbonera, C.
name: Corso, G.
name: Barbieri, R.
name: Proto, A.
name: Ottimofiore, G.
name: Lombardi, A.
name: Po, R.
name: Ferrazza, F.
name: Tinti, F.
name: Camaioni, N.
name: Nitti, A.
name: Pasini, D.
Publisher: name: WIP
Year: 2020
Subjects: Perovskites and Other Non-Silicon Materials, MJs and Tandems
Organic and Dye-Sensitised

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 725-727
description: In this communication we report on the photovoltaic performances of PATTD, a donor polymer based on the novel anthradithiophene (AT) electron-rich unit and the electron-poor dithiophenedione (TD) unit, connected by two thiophene flanking units. Inverted solar cells with architecture glass/ITO/ZnO/PATTD:X/MoO3/Ag have been fabricated, using different acceptors (X), by typical laboratory-scale techniques, namely spincoating for the electron transport layer and the active layer and vacuum evaporation for the hole transport layer and the anode. Maximum power conversion efficiencies (PCEs) of 10.5% have been achieved with X=ITIC-4F as acceptor, while X=ITIC afforded devices with 8.6 % PCE. Notably, with X=PCBM, PCE values of 6.7% has been obtained, demonstrating that good performances can be obtained also with a relatively cheap acceptor. To prove the potential of this polymer in a roll-to-roll scalable process, the PATTD:ITIC blend was deposited on PET/ITO/ZnO by slot-die coating, leading to PCE values of 4.8% in a R2R system.
Impedance Spectroscopy Models of CZTSe Nanolayer Ge Bi-Layers Devices
Creators: name: Lee, S.
name: Price, K.J.
name: Saucedo, E.
Publisher: name: WIP
Year: 2020
Subjects: Perovskites and Other Non-Silicon Materials, MJs and Tandems
CI(G)S, CdTe and Related Thin Films

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 710-712
description: In this contribution, we propose an AC response equivalent circuit model to describe the impedance spectroscopy of CZTSe nanoscale Ge bi-layers solar cells. A developed equivalent circuit of CZTSe Ge bi-layers solar cells reflects a realistic device structure, involving the contact & bulk resistance, resistance and capacitance of one heterojunction interface, two effective back-contact interfaces, and a buffer interface. The impedance model is characterized by proposing an equivalent circuit that includes series and parallel resistance and constant phase element to accurately model the device structure. The Sentaurus TCAD simulation is performed to confirm the structure of a proposed device model. The in-house MATLAB simulator, connected to external TCAD simulation tools are designed for the accurate impedance model with the simulated structures to illustrate the effectiveness of impedance models of CZTSe Ge bi-layers solar cells, associated with MoSe2 interfacial defects.
Effect of CdS1-xTex Intermix Layer Thickness on CdTe Solar Cell Performance
Creators: name: Kumar Das, N.
name: Farhad, S.F.U.
name: Chakrabartty, J.
name: Matin, M.A.
name: Amin, N.
Publisher: name: WIP
Year: 2020
Subjects: Perovskites and Other Non-Silicon Materials, MJs and Tandems
CI(G)S, CdTe and Related Thin Films

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 713-717
description: We report the formation of the CdS1-xTex intermix layer during the synthesis of CdTe thin films onto CdS and CdS:O/CdS bilayer substrates separately by using close-spaced sublimation (CSS) and radio frequency (RF) sputtering. The as-grown CdTe films were characterized by XRD and UV-Vis-NIR, respectively. The XRD spectra revealed the polycrystalline nature of all the CdTe films. The CdTe films deposited by CSS technique are preferentially oriented along (111) direction, and the average crystallite domain size is around two times bigger than those of the films grown by RF Sputtering. Meanwhile, intense intermix phases of the CdS1-xTex layer were observed for the CSS grown CdTe films atop the CdS layer and optimal interdiffusion between CdS/CdTe layer were observed for CdTe films synthesized atop the CdS:O/CdS bilayer. The CSS deposited CdTe films showed better optical absorption compared to the RF sputter CdTe films. The estimated optical bandgap is around 1.46 eV and 1.54 eV, respectively, for the CSS and RF sputter CdTe films. Besides, we model the effect of the p-type CdS1-xTex intermix layer on the performance of CdTe solar cells with the SCAPS-1D simulator. In device modelling, we varied the x fraction of the CdS1-xTex layer from 0 to 0.4 to optimize the bandgap (1.35 eV) for achieving higher power conversion efficiency (PCE) while keeping the CdS1-xTex layer thickness 10 nm fixed. After that, we optimize the CdS1-xTex layer thickness to 300 nm, where the simulated cell showed significant efficiency of 22.47% with Voc of 1.03 V, Jsc of 30.78 mA/cm2, FF of 70.97 %.