cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Design Optimization of Bifacial Module PV Power Plants Based on Simulations and Measurements
Creators: name: Guari Borrull, M.
name: Scherl, A.
name: Kampschulte, T.
Publisher: name: WIP
Year: 2020
Subjects: PV Systems and Storage – Modelling, Design, Operation and Performance
Design and Installation of PV Systems

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 1305-1310
description: In contrast to monofacial photovoltaic (PV) systems, bifacial PV systems can harvest sunlight from both front and rear sides, hence increasing the generated energy yield. The biggest contribution to the additional generated energy comes from the irradiance reaching the rear side of the bifacial module, which depends on the system installation design. In this work, the optimum geometry of system design for bifacial PV systems is analysed. The individual and combined effect of the installation parameters on the energy yield of bifacial PV systems are studied through simulations and measurements. The experimental approach to the present work involves calibrating simulations on PVsyst through long- and shortterm measurements. Besides from calibration of simulations, on the one side, long-term measurements give the information of how the Bifacial Gain in Energy (BGE) behaves along the year as well as predictions of the annual BGE. On the other side, short-term measurements allow finding the individual effect of different installation settings such as albedo and size of the system. Results show that the BGE is directly proportional to the ground albedo. For a big scale bifacial PV system with nonartificial installed albedo, annual BGE’s of 4 % are yielded. Moreover, by installing a white reflective cover underneath the modules, it is found that the BGE can be increased up to 8 %. It is also found that modules in large scale systems generate comparably lower energy levels due to large shadowing areas; up to 12 % less bifacial gain in comparison to single modules.
Optimizing the Utilization of Reflective Materials for Bifacial PV Plants
Creators: name: Rhazi, O.L.
name: Chiodetti, M.
name: Dupuis, J.
name: Benyakhlef, S.
name: Radouane, K.
name: Dupeyrat, P.
Publisher: name: WIP
Year: 2020
Subjects: PV Systems and Storage – Modelling, Design, Operation and Performance
Design and Installation of PV Systems

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 1286-1291
description: Since 2017, many potential reflective materials have been tested in EDF R&D PV Test Zone in order to quantify their albedo. This testing approach enables to evaluate, in addition to the reflective performance and variation over time of each material, the degradation aspects and the O&M related issues. Some relevant solutions have been installed afterwards under bifacial modules to assess the bifacial gain enhancement by the improved albedo. To maximize the yield and LCOE achievable gain with the albedo boost material for a bifacial PV plant, a modelling approach have been established aiming at defining an optimized positioning and sizing for the reflective materials by evaluating the bifacial gain and yield for each design.
Food Commodity Suppliers Ethical Business Formation Towards the Downstream Supply Chain in Addis Ababa.
Creators: name: Tufa, Roba
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2019

description: Conducting business in an ethical and responsible manner generates trust and leads to relationships that promote productivity and innovation. In contrary there are evidences that unethical and deliberate practices in Ethiopian businesses in more complex and hazards ways. Especially suppliers misrepresent their products by mixing food supplies with harmful/cheap items and artificially imbalances demand & supply by hiding or holding food items from market to increase price. The purpose of this study is to examine the ethical business practice of food commodity suppliers in Addis Ababa, Ethiopia. The aim is to determine awareness level of food supply chain actors on the importance of ethical business formation and the level of priority/attention level given to ethical food business operations by concerned stakeholders to control un-ethical business expansions. In addition, the study is to identify the root causes of unethical business formation on food commodity suppliers in and challenges for food commodity suppliers to experience ethical business formation. Suppliers of food commodity at downstream supply chain and concerned stakeholders to control un-ethical business expansions are the target population of the study. Data is collected through scheduled interview and analysis has been carried out with the help of descriptive statistics analysis method. As a result, the study finds out lower level awareness and the given attention or priority level for ethical business formation by government and other stakeholders. The study also identified causes for un-ethical business formation and challenges of suppliers to perform ethical business, from highest to lowest impact ranks
Effective Spectral Albedo from Satellite Data for Bifacial Gain Calculations of PV Systems
Creators: name: Blakesley, J.C.
name: Koutsourakis, G.
name: Douglas, S.
name: Holder, J.K.L.
name: Torry, J.
name: Mukadam, F.A.
name: Schmid, A.
name: Abrams, R.S.J.
Publisher: name: WIP
Year: 2020
Subjects: PV Systems and Storage – Modelling, Design, Operation and Performance
Design and Installation of PV Systems

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 1292-1297
description: A key requirement for increasing the accuracy of energy yield modelling is the accurate estimation of the ground albedo value of a potential site. As most natural surfaces are not white, the colour as well as irradiance of reflected light needs to be considered. In this work we use spectral ground reflectance datasets from satellite data and ground-based stations in order to extract effective spectral albedo values and their uncertainties for bifacial PV system energy yield modelling. We demonstrate satellite spectral reflectance data as a realistic case for bifacial gain calculations and validate them with the ground-based data. An effective albedo calculation methodology is introduced, where the spectral albedo dataset, spectral irradiance and spectral response of the PV module type of the potential system are considered. Comparing 20 different locations and 3 different bifacial module types, we show that it is critically important to account for diurnal and seasonal variations in spectral albedo in bifacial gain calculations. We also show that there can be significant differences between front side and rear side spectral response in silicon bifacial PV modules which can lead to differences of greater than 20 % in the effective value of ground reflected irradiance.
Projeto Laguna: infraestrutura de um lago de dados científicos em Acesso Aberto
Creators: name: Segundo, Washington
name: Pinto, Adilson Luiz
name: Canto, Fábio L. do
name: Neubert, Patricia
Publisher: name: Zenodo
Year: 2023

description: Apresentação realizada na sessão "Pecha Kucha III" da 14ª Conferência Lusófona de Ciência Aberta, Natal Brasil, de 18 a 21 de setembro de 2023.
The Moon Zoo citizen science project: Preliminary results for the Apollo 17 landing site
Creators: name: Bugiolacchi, Roberto
name: Bamford, Steven
name: Tar, Paul
name: Thacker, Neil
name: Crawford, Ian A.
name: Joy, Katherine H.
name: Grindrod, Peter M.
name: Lintott, Chris
Publisher: name: arXiv
Year: 2016
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Moon Zoo is a citizen science project that utilises internet crowd-sourcing techniques. Moon Zoo users are asked to review high spatial resolution images from the Lunar Reconnaissance Orbiter Camera (LROC), onboard NASAs LRO spacecraft, and perform characterisation such as measuring impact crater sizes and identify morphological features of interest. The tasks are designed to address issues in lunar science and to aid future exploration of the Moon. We have tested various methodologies and parameters therein to interrogate and reduce the Moon Zoo crater location and size dataset against a validated expert survey. We chose the Apollo 17 region as a test area since it offers a broad range of cratered terrains, including secondary-rich areas, older maria, and uplands. The assessment involved parallel testing in three key areas: (1) filtering of data to remove problematic mark-ups; (2) clustering methods of multiple notations per crater; and (3) derivation of alternative crater degradation indices, based on the statistical variability of multiple notations and the smoothness of local image structures. We compared different combinations of methods and parameters and assessed correlations between resulting crater summaries and the expert census. We derived the optimal data reduction steps and settings of the existing Moon Zoo crater data to agree with the expert census. Further, the regolith depth and crater degradation states derived from the data are also found to be in broad agreement with other estimates for the Apollo 17 region. Our study supports the validity of this citizen science project but also recommends improvements in key elements of the data acquisition planning and production.
description: Accepted for publication in Icarus
Research paper on firm human capital investment and wage inequality and employment
Creators: name: Jona-Lasinio, Cecilia
name: Venturini, Francesco
Publisher: name: Zenodo
Year: 2022
Subjects: training, IT upskilling, wage premium, European firms

description: Using company-level data from three waves of the Continuing Vocational Training Survey (2005, 2010 and 2015), this paper provides an overview on European firms implementing training and the magnitude of their training effort. We illustrate in the descriptive statistics that there are significant differences in the wage and employment performance across companies in relation to the digital content of their production and training activities. We conduct a regression analysis documenting that a wage premium of 9% is associated with companies undertaking training and that an additional 8% is paid by firms arranging training for IT skills-intensive workers. The latter effect is pervasive across sectors and is not strictly related to industry exposure to the digital transformation. We seek to address both the simultaneity and the selectivity issue of our data implementing an instrumental variable regression and a propensity score matching procedure.
Leaf from a Breviary, Fragment
Creators: name: :Unav
Publisher: name: University of Victoria Libraries
Year: 2020
Subjects: subject: Gregorian chants
valueUri: http://id.worldcat.org/fast/947816
subject: Music
valueUri: http://id.worldcat.org/fast/1030269
subject: Manuscripts, Medieval
valueUri: http://id.worldcat.org/fast/1008422
subject: Breviaries
valueUri: http://id.worldcat.org/fast/838495

description: Breviary, Spain, c.1550-1600, with musical notation. A leaf from a noted Breviary featuring three responsorial chants from the Matins of Christmas: Orietur in diebus Domini abundantia, Veritas de terra orta, and O magnum mysterium. All three are traditional Gregorian chants in the vocal range of a typical male adult.
Piezoresistive Foam Sensor Arrays for Marine Applications
Creators: name: Dusek, Jeff E.
name: Triantafyllou, Michael S.
name: Lang, Jeffrey H.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Spatially-dense pressure measurements are needed on curved surfaces in marine environments to provide marine vehicles with the detailed, real-time measurements of the near-field flow necessary to improve performance through flow control. To address this challenge, a waterproof and conformal pressure sensor array comprising carbon black-doped-silicone closed-cell foam (CBPDMS foam) was developed for use in marine applications. The response of the CBPDMS foam sensor arrays was characterized using periodic hydrodynamic pressure stimuli from vertical plunging, from which a piecewise polynomial calibration was developed to describe the sensor response. Inspired by the distributed pressure and velocity sensing capabilities of the fish lateral line, the CBPDMS foam sensor arrays have significant advantages over existing commercial sensors for distributed flow reconstruction and control. Experimental results have shown the sensor arrays to have sensitivity on the order of 5 Pascal, dynamic range of 50-500 Pascal; are contained in a waterproof and completely flexible package, and have material cost less than $10 per sensor.
Understanding the Reverse Behaviour of Multijunction Solar Cells
Creators: name: Gonzalez, J.R.
name: Martín, P.
name: Rey-Stolle, I.
name: Baur, C.
name: Fernández Lisbona, E.
Publisher: name: WIP
Year: 2020
Subjects: PV Systems and Storage – Modelling, Design, Operation and Performance
Concentrators and PV for Space Applications

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 1275-1280
description: Multijunction solar cells are exposed to reverse bias operation under certain situations during their life. Even though the cells are protected with bypass diodes, the limiting subcell within the multijunction stack can be in reverse operation in some cases. This work assesses the reverse behaviour of component and triple junction cells using a model based on the Ecosim environment. Dynamic effects have been considered in the modelling of the parallel resistance, in order to get a more accurate simulation of the performance in reverse. The simulation tool has been expanded to four-junction devices, with good preliminary results under different spectral conditions.
Development of an External Quantum Efficiency Method to Characterize Solar Cells with a Micro Spot: Applied to Micro-Concentrated Systems
Creators: name: Voarino, P.
name: Bermudez-Garcia, A.
name: Chehade, A.
name: Couderc, R.
Publisher: name: WIP
Year: 2020
Subjects: PV Systems and Storage – Modelling, Design, Operation and Performance
Concentrators and PV for Space Applications

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 1281-1285
description: The electrical characterization of solar cells is essential to predict the future performance of solar panels in real conditions. Having access to the External Quantum Efficiency (EQE) is also a major asset for understanding the physical phenomena in a photovoltaic device, whether it is made of Silicon, thin films, organic or III-V materials. The development proposed in this paper gives access to the EQE of solar cells in a localized way, using a light spot smaller than 1 mm². This device is useful for several applications (i.e., curved cells, EQE mapping, etc.) avoiding or reducing fingers shadowing. The highlighted application of this method is the characterization of Multi-Junction Solar Cell (MJSC) with a surface lower than 1 mm², typically used in micro-concentrated systems.
Optimisation de l’Observation dans les estuaires Picard (Manche orientale) : phase de test d’un flotteur instrumenté : autonomie des batteries et recharge via des panneaux solaires.
Creators: name: Lescroart, Elsa
name: Lefebvre, Alain
Publisher: name: Ifremer
Year: 2024
Subjects: Observation
Manche orientale
Bouée instrumentée
batterie
Panneaux solaires

description: This report demonstrates the ability of the control and monitoring system (Ai1) on the DB600 instrumented buoy (Xylem) to maintain correct battery voltage, compatible with high-resolution acquisition of 5 variables, using solar panels and in the face of contrasting sunlight conditions. Apart from days of low light intensity, such as foggy days or days with a UV index of less than or equal to 1, the Ai1 is able to generate the energy it needs to operate properly. The Ai1 can therefore be deployed on an instrumented buoy, paying close attention to weather conditions, as a few consecutive days of bad weather can compromise the system's operation, thus limiting deployment time.
description: Ce rapport montre la capacité du système de contrôle et de pilotage (l’Ai1) de la bouée instrumentée DB600 (Xylem) à maintenir une tension correcte de sa batterie, compatible avec une acquisition à haute résolution de 5 variables, à l’aide de panneaux solaires et face à des conditions d’ensoleillement contrastés. En dehors des jours de faible intensité lumineuse comme les jours de brouillard ou les jours avec un indice UV inférieur ou égale à 1, l’Ai1 est capable de générer l’énergie nécessaire à son bon fonctionnement. L’Ai1 peut donc être déployé sur une bouée instrumentée en étant attentif aux conditions météorologiques car quelques jours consécutifs de mauvais temps peuvent compromettre le fonctionnement du système et limiter ainsi le temps de déploiement.
MPEC 2024-B181 : 2024 BD4
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 BD4

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Comment on "Fokker-Planck equations for nonlinear dynamical systems driven by non-Gaussian Lévy processes" [J. Math. Phys. 53, 072701 (2012)]
Creators: name: Magdziarz, Marcin
name: Zorawik, Tomasz
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: In an article [J. Math. Phys. 53, 072701 (2012)] X. Sun and J. Duan presented Fokker-Planck equations for nonlinear stochastic differential equations with non-Gaussian Lévy processes. In this comment we show a serious drawback in the derivation of their main result. In the proof of Theorem 1 in the aforementioned paper, a false assumption that each infinitely differentiable function with compact support is equal to its Taylor series, is used. We prove that although the derivation is incorrect, the result remains valid only if we add certain additional assumptions.
Folium from a Book of Hours, Fragment
Creators: name: :Unav
Publisher: name: University of Victoria Libraries
Year: 2020
Subjects: subject: Manuscripts, Medieval
valueUri: http://id.worldcat.org/fast/1008422
subject: Prayers and devotions
valueUri: http://id.worldcat.org/fast/1935484
subject: Books of hours
valueUri: http://id.worldcat.org/fast/836484
subject: Catholic Church
valueUri: http://id.worldcat.org/fast/531720

description: Folium from a medieval Book of Hours, French (Tours?); s. xviin (c.1500)
The topological sliceness of 3-strand pretzel knots
Creators: name: Miller, Allison N.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57M25

description: We give a complete characterization of the topological slice status of odd 3-strand pretzel knots, proving that an odd 3-strand pretzel knot is topologically slice if and only if either it is ribbon or has trivial Alexander polynomial. (By work of [FS85], a nontrivial odd 3-strand pretzel knot $K$ cannot both be ribbon and have $Δ_K(t)=1$.) We also show that topologically slice even 3-strand pretzel knots (except perhaps for members of Lecuona's exceptional family of [Lec13]) must be ribbon. These results follow from computations of the Casson-Gordon 3-manifold signature invariants associated to the double branched covers of these knots.
description: 17 pages, 3 figures
Benchmark and Irradiation Tests of Terrestrial Solar Cells for Low Cost Space Solar Array
Creators: name: Duzellier, S.
name: Cariou, R.
name: Nuns, T.
name: Voarino, P.
name: Chabuel, F.
name: Aicardi, C.
Publisher: name: WIP
Year: 2020
Subjects: PV Systems and Storage – Modelling, Design, Operation and Performance
Concentrators and PV for Space Applications

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 1264-1268
description: The need for low cost photovoltaic solutions is becoming more and more important with the ongoing NewSpace revolution. In this study, we review, as comprehensively as possible, the radiation hardness of various photovoltaic solar cells technologies. Emphasis is placed on cells offering attractive cost reduction compared to standard III-V based triple junctions. In addition, the following benchmarking criteria were identified: performance, including begin and end of life evolution (BOL/EOL) when submitted to doses/fluences, mass, Technological Readiness Level (TRL) and reliability.
Le laboratoire de textes [cluster 5b] : approche modulaire
Creators: name: Lecouteux, Stéphane
name: Kuhry, Emmanuelle
name: Demonet, Marie-Luce
Publisher: name: Zenodo
Year: 2023
Subjects: "Cluster 5b"
"Laboratoire de textes"
"Laboratoire de sources écrites"

description: Bilan scientifique de l'année 2022, présenté lors des journées annuelles de l'Equipex+ Biblissima+ organisées au Campus Condrocet les 3 et 4 avril 2023.
description: Ce travail a bénéficié d'une aide de l'État gérée par l'Agence Nationale de la Recherche au titre du programme d'Investissements d'avenir portant la référence « ANR-21-ESRE-0005 » (ÉquipEx Biblissima+)
Bipartite depolarizing channels
Creators: name: Lami, Ludovico
name: Huber, Marcus
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We introduce a 3-parameter class of maps acting on a bipartite system that are a natural generalisation of the depolarizing channel (and include it as a special case). Then, we find the exact regions of the parameter space that alternatively determine a positive, completely positive, entanglement-breaking or entanglement-annihilating map. This model displays a much richer behaviour than the one shown by a simple depolarizing channel, yet it stays exactly solvable. As an example of this richness, PPT but not entanglement-breaking maps are found. A simple example of a positive yet indecomposable map is provided. Then, the study of the entanglement-annihilating property is fully addressed. Finally, we apply our results to solve the problem of the entanglement annihilation caused in a bipartite system by a tensor product of local depolarizing channels. In this context, a conjecture recently posed in the literature is proven, and many related open questions are answered. To arrive at this result we furthermore show how the Hadamard product between quantum states can be implemented via local operations.
description: 18 pages, 3 figures
Persistence of slow dynamics in Tb(OETAP)$_2$ single molecule magnets embedded in conducting polymers
Creators: name: Orlando, Tomas
name: Filibian, Marta
name: Sanna, Samuele
name: Giménez-Agullo, Nelson
name: de Pipaón, Cristina Sáenz
name: Ballester, Pau
name: Galán-Mascarós, José Ramón
name: Carretta, Pietro
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The spin dynamics of Tb(OETAP)$_2$ single ion magnets was investigated by means of muon spin resonance ($μ$SR) both in the bulk material as well as when the system is embedded into PEDOT:PSS polymer conductor. The characteristic spin fluctuation time is characterized by a high temperature activated trend, with an energy barrier around 320 K, and by a low temperature tunneling regime. When the single ion magnet is embedded into the polymer the energy barrier only slightly decreases and the fluctuation time remains of the same order of magnitude even at low temperature. This finding shows that these single molecule magnets preserve their characteristics which, if combined with those of the conducting polymer, result in a hybrid material of potential interest for organic spintronics.
description: 9 pages, 7 figures
Optics Development and Demonstration of Line-Focus Space Concentrator Prototype Using III-V/Si Cells
Creators: name: Bermudez-Garcia, A.
name: Voarino, P.
name: Chabuel, F.
name: Raccurt, O.
Publisher: name: WIP
Year: 2020
Subjects: PV Systems and Storage – Modelling, Design, Operation and Performance
Concentrators and PV for Space Applications

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 1269-1274
description: The French Commission for Atomic and Alternative Energies (CEA) has been investigating an innovative, low cost and robust photovoltaic system architecture that combines the high conversion efficiencies of Concentrated PhotoVoltaics (CPV) with a low-priced Silicon based (III-V/Si) solar cells. This new approach will significantly reduce cost by concentrating sunlight then decreasing cell material, in particular using III–V/Si triplejunction cells will allow the usage of Silicon, which is an abundant, twice less dense and low-cost material than the typically used Germanium. Additionally, this linear-focus optics enables the use of single-axis Sun tracker. In our refractive module design, Compound Parabolic Concentrator (CPC), twelve 1.5x13 mm² cells (25.7% efficient @AM0) are embedded in a Dow Corning® 93-500 silicone optics that provides about 8.6x (i.e., x: concentration factor). The proposed CPV surface receiver has been optimized, maximizing the sunlight flux on solar cells respect to a previous design. As the receiver area was reduced about 59.3%, a mass redistribution was carried out in order to increase the design efficiency by rising the concentrating factor from 7.6x to 8.6x and a theoretical gain of the optical efficiency of about 19%. Moreover, measurements shown an experimental optical efficiency of 80.4%, so an increase of 12% has been achieved. This paper presents multilevel optimization based on the first concentrator prototype using III-V on Si cells for space applications, from the optical system design using TracePro® to the manufacturing molding process and characterization.
ALFAMA Project: Development of a Flexible and Laminated Space Photovoltaic Array
Creators: name: Guerin, T.
name: Cariou, R.
name: Noël, S.
name: Khorenko, V.
name: Jamin, C.
name: Roujol, Y.
name: Voarino, P.
name: Chabuel, F.
Publisher: name: WIP
Year: 2020
Subjects: PV Systems and Storage – Modelling, Design, Operation and Performance
Concentrators and PV for Space Applications

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 1261-1263
description: The ALFAMA project - Advanced Lightweight and Flexible Array with Mechanical Architecture - focuses on the development of a flexible solar array for high power space missions. Nowadays, the booming of space activities comes along with a greater power demand. A reduction of solar array stowage volume (W/m3) and an increased power/mass ratio (W/kg) are needed, and moving away from standard rigid panels towards flexible solar arrays is promising to meet this high-power demand. Material selection, layer stack design, as well as interconnector technology are key drivers to build a robust flexible array. The work presented here focuses on the development of a flexible solar array coupons.
Gyroidal nanoporous carbons - Adsorption and separation properties explored using computer simulations
Creators: name: Furmaniak, S.
name: Gauden, P. A.
name: Terzyk, A. P.
name: Kowalczyk, P.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Adsorption and separation properties of gyroidal nanoporous carbons (GNCs) - a new class of exotic nanocarbon materials are studied for the first time using hyper parallel tempering Monte Carlo Simulation technique. Porous structure of GNC models is evaluated by the method proposed by Bhattacharya and Gubbins. All the studied structures are strictly microporous. Next, mechanisms of Ar adsorption are described basing on the analysis of adsorption isotherms, enthalpy plots, the values of Henry's constants, $α_{s}$ and adsorption potential distribution plots. It is concluded that below pore diameters ca. 0.8 nm, primary micropore filling process dominates. For structures possessing larger micropores, primary and secondary micropore filling mechanism is observed. Finally, the separation properties of GNC toward CO$_2$/CH$_4$, CO$_2$/N$_2$, and CH$_4$/N$_2$ mixtures are discussed and compared with separation properties of Virtual Porous Carbon models. GNCs may be considered as potential adsorbents for gas mixture separation, having separation efficiency similar or even higher than activated carbons with similar diameters of pores.
description: 14 pages, 10 figures
Probabilistic Forecast of All-Sky Solar Radiation Using Enhanced WRF-Solar
Creators: name: Kim, J.-H.
name: Jimenez, P.A.
name: Dudhia, J.
name: Yang, J.
name: Sengupta, M.
name: Xie, Y.
Publisher: name: WIP
Year: 2020
Subjects: PV Systems and Storage – Modelling, Design, Operation and Performance
Solar Resource and Forecasting

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 1247-1249
description: This study presents enhancements of the Weather Research and Forecasting model with solar extensions (WRFSolar) to provide probabilistic forecasts of solar radiation. Our approach builds ensemble WRF-Solar runs by introducing stochastic perturbations of variables that produce the largest uncertainties in predicting surface irradiance and clouds. The key variables are identified using tangent linear sensitivity analysis of six physics packages responsible for all-sky irradiance variability. An optimal strategy to stochastically perturb the selected variables is developed and applied to WRF-Solar to generate ensemble members for day-ahead solar prediction. The National Solar Radiation Database (NSRDB) is used to validate the ensemble forecast at arbitrary locations on the model grid. Preliminary results indicate that the proposed technique can potentially produce WRF-Solar ensembles providing reliable information of solar prediction uncertainty. This study describes the implemented methodology and initial results as well as future research to improve ensemble-based probabilistic forecasts with WRF-Solar.
Hybrid Modelling of PV Power Generation for Enhanced Forecasting
Creators: name: Theocharides, S.
name: Makrides, G.
name: Theristis, M.
name: Kynigos, M.
name: Georghiou, G.E.
Publisher: name: WIP
Year: 2020
Subjects: PV Systems and Storage – Modelling, Design, Operation and Performance
Solar Resource and Forecasting

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 1256-1260
description: Accurate photovoltaic (PV) production forecasting is an important feature that can assist utilities and plant operators in the direction of energy management and dispatchability planning. Although numerous forecasting models have been reported in literature, the challenge of improved accuracy remains unsolved. In this work, a day-ahead PV power model utilising a hybrid approach is derived to feed into an Artificial Neural Network (ANN) and a linear regression model trained for PV power forecasting. The study focuses on improving the forecasting accuracy by employing machine learning and linear regression models that could record the behaviour of the PV system. The performance of the hybrid model was assessed against a single ANN model using a historical test set. The results showed that the hybrid model outperformed the single ANN model exhibiting a normalised mean square error (nRMSE) of 7.05%.
Simulation and Validation of Bifacial Irradiance Sensor Mounting Position
Creators: name: Korevaar, M.
name: Babal, P.
name: Franken, S.
name: Amarnath, A.
name: Van Nieuwkerk, S.
name: Bergmans, T.
name: Wilson, K.M.
name: Mes, J.
Publisher: name: WIP
Year: 2020
Subjects: PV Systems and Storage – Modelling, Design, Operation and Performance
Solar Resource and Forecasting

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 1233-1236
description: In recent decades, photovoltaic panels have emerged as one of the leading renewable energy technologies. A new development is the advent of bifacial modules which enhance the energy production by conversion of rearside irradiance. To accurately know the performance ratio of PV parks with bifacial modules it is necessary to also measure the irradiance due to ground albedo. Kipp & Zonen produces an albedometer which can measure either the albedo or the front and rearside plane of array (POA) irradiance very accurately. However, for the measurement of the POA rearside irradiance, it matters where the mounting position within the PV plant is. To come with more insights which mounting position is advised, we have performed a simulation study using NREL developed software: Bifacial Radiance. The effect of different positions on the rear side of the PV module, different places within the PV plant, different albedo numbers, mounting heights, as well as different geographical locations with different tilt are investigated. A position at which the measured irradiance represents the average irradiance over one year on the panels is at +/- 68% height on the rear of the modules for the particular design simulated. Additionally, the effect of solar elevation during different months of the year as well as different weather conditions on selected days is also investigated. A validation of the results of the simulation using multiple sensors in the Kipp & Zonen roof setup is presented.
ZFOURGE catalogue of AGN candidates: an enhancement of 160μm-derived star-formation rates in active galaxies to $z$ = 3.2
Creators: name: Cowley, Michael J.
name: Spitler, Lee R.
name: Tran, Kim-Vy H.
name: Rees, Glen A.
name: Labbé, Ivo
name: Allen, Rebecca J.
name: Brammer, Gabriel B.
name: Glazebrook, Karl
name: Hopkins, Andrew M.
name: Juneau, Stéphanie
name: Kacprzak, Glenn G.
name: Mullaney, James R.
name: Nanayakkara, Themiya
name: Papovich, Casey
name: Quadri, Ryan F.
name: Straatman, Caroline M. S.
name: Tomczak, Adam R.
name: van Dokkum, Pieter G.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We investigate active galactic nuclei (AGN) candidates within the FourStar Galaxy Evolution Survey (ZFOURGE) to determine the impact they have on star-formation in their host galaxies. We first identify a population of radio, X-ray, and infrared-selected AGN by cross-matching the deep $K_{s}$-band imaging of ZFOURGE with overlapping multi-wavelength data. From this, we construct a mass-complete (log(M$_{*}$/M$_{\odot}$) $\ge$ 9.75), AGN luminosity limited sample of 235 AGN hosts over z = 0.2 - 3.2. We compare the rest-frame U - V versus V - J (UVJ) colours and specific star-formation rates (sSFRs) of the AGN hosts to a mass-matched control sample of inactive (non-AGN) galaxies. UVJ diagnostics reveal AGN tend to be hosted in a lower fraction of quiescent galaxies and a higher fraction of dusty galaxies than the control sample. Using 160μm Herschel PACS data, we find the mean specific star-formation rate of AGN hosts to be elevated by 0.34$\pm$0.07 dex with respect to the control sample across all redshifts. This offset is primarily driven by infrared-selected AGN, where the mean sSFR is found to be elevated by as much as a factor of ~5. The remaining population, comprised predominantly of X-ray AGN hosts, is found mostly consistent with inactive galaxies, exhibiting only a marginal elevation. We discuss scenarios that may explain these findings and postulate that AGN are less likely to be a dominant mechanism for moderating galaxy growth via quenching than has previously been suggested.
description: 15 pages, 9 figures, Accepted for publication in MNRAS
Cross-Location Solar Irradiance Nowcasting by Metadata-Augmented CNN-LSTM Neural Networks from Satellite Images
Creators: name: Lee, K.-Y.
name: Huang, H.-F.
name: Hsu, W.H.
name: Chen, W.-C.
Publisher: name: WIP
Year: 2020
Subjects: PV Systems and Storage – Modelling, Design, Operation and Performance
Solar Resource and Forecasting

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 1237-1246
description: Photovoltaics (PV) has witnessed the fastest growth in the passing years,1 raising the importance of monitoring the efficiency of PV generation. Conventionally, monitoring is highly dependent on pyranometers to obtain solar irradiation (for nowcasting). Yet, in many scenarios pyranometers are unavailable (e.g. arbitrary location) or malfunction (e.g., dust, miscalibration) In this work, we proposed to estimate solar irradiation through processing a series of satellite images with the proposed novel neural networks. We observed the significance of the single-valued metadata, Sun position, in determining irradiation and proposed a novel fusion method of significant metadata (Sun position) that outperforms prevalent ones, where information of single-valued metadata tends to be dominated by the rich information in raw features (images). Also, with the limited amount of data, we proposed Unsupervised Learning on Natural Repetitiveness (ULNAR) that assists model training based on the implicit repeated nature of satellite images of the same locations. With solely satellite images, our method performed on par with the state-of-the-art meteorological model that requires multiple data sources inclusive of aerosol optical density, water vapor and ozone column. Our predictions closely aligned with ground truth irradiations from meticulously maintained pyranometers. Moreover, the Mean Absolute Percent Error (MAPE) is 25% lower than that of a commercialized solar data provider.
Parthenia, or, The first musicke ever printed for the virginals
Creators: name: Byrd, William, 1539 Or 1540-1623
Publisher: name: University of Victoria Libraries
Year: 2021
Subjects: subject: Harpsichord music
valueUri: http://id.worldcat.org/fast/951680

description: The first printed collection of music for keyboards in England - comprising of eight pieces by William Byrd, seven by John Bull, and six by Orlando Gibbons. Edited by Edward F. Rimbault. Includes facsimiles of the original illustrated title page (1611) and the dedication of the 1613 reprint. Publications of the Musical Antiquarian Society, v. 18.
Entrainment dominates the interaction of microalgae with micron-sized objects
Creators: name: Jeanneret, Raphaël
name: Kantsler, Vasily
name: Polin, Marco
Publisher: name: arXiv
Year: 2016
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The incessant activity of swimming microorganisms has a direct physical effect on surrounding microscopic objects, leading to enhanced diffusion far beyond the level of Brownian motion with possible influences on the spatial distribution of non-motile planktonic species and particulate drifters. Here we study in detail the effect of eukaryotic flagellates, represented by the green microalga Chlamydomonas reinhardtii, on microparticles. Macro- and micro-scopic experiments reveal that microorganism-colloid interactions are dominated by rare close encounters leading to large displacements through direct entrainment. Simulations and theoretical modelling show that the ensuing particle dynamics can be understood in terms of a simple jump-diffusion process, combining standard diffusion with Poisson-distributed jumps. This heterogeneous dynamics is likely to depend on generic features of the near-field of swimming microorganisms with front-mounted flagella.
description: 7 pages; 3 figures. Supplementary Informations available upon request
Imputation of Missing Values in Irradiance Datasets
Creators: name: Louwen, A.
name: Lindig, S.
name: Moser, D.
Publisher: name: WIP
Year: 2020
Subjects: PV Systems and Storage – Modelling, Design, Operation and Performance
Solar Resource and Forecasting

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 1224-1227
description: For analysis of PV performance degradation, sufficiently long timeseries of measurements of PV performance and irradiance are required. Since the performance of PV systems shows clear seasonal variation and the seasonal trend needs to be separated from the long-term trend, at least monthly data is required, and large gaps in timeseries hamper the ability to perform degradation analyses. For short gaps in timeseries simple approaches like interpolation can be applied for imputation of missing values, however, for longer gaps more complex methods are required. In this paper, we analyse the imputation of missing plane-of-array (GPOA) irradiance values. We used a dataset with measurements of GPOA, global horizontal (GHI), diffuse horizontal (DH) and direct normal (DNI) irradiance to train several machine learning and irradiance transposition models to predict plane-of-array irradiance from the other irradiance measurements. To optimize the model hyperparameters, we performed an hyperparameter optimisation using a sample of the complete dataset. We then compared the models for accuracy by calculating the root-mean-squared-error of predictions made with a testing dataset. The three most accurate models were then reoptimised with the full dataset. Finally, the most accurate model was determined, and the missing GPOA irradiance values were estimated. Our results show that in this application, the machine learning models yield far more accurate results than the irradiance transposition models (RMSE of ~30-40 W/m2 vs. ~90-100 W/m2, respectively). The most accurate results were obtained with gradient boosting regression models, with and RMSE of 28.1 W/m2.
Plasmonic Crystal Cavity on Single-Mode Optical Fiber End Facet for Label-Free Biosensing
Creators: name: He, Xiaolong
name: Yi, Hui
name: Long, Jing
name: Zhou, Xin
name: Yang, Jie
name: Yang, Tian
Publisher: name: arXiv
Year: 2015
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: All surface plasmon resonance (SPR) devices on single-mode optical fibers' (SMF) end facets, as reported up to date, are limited by severely broad and shallow resonance spectra. The consequent poor performance when they are used as refractive index sensors, together with the challenge of nanofabrication on fiber end facets, has prohibited the development of such devices for label-free biosensing. Meanwhile, the planewave coupled, multimode fiber and fiber sidewall SPR counterparts are extensively employed for label-free biosensing. In this paper, we report the design, fabrication and characterization of a plasmonic crystal cavity on a SMF end facet, which shows high performance label-free sensing capability that comes from a steep cavity resonance near the plasmonic bandedge. The experimental figure-of-merit is 68 RIU^-1, which is over twenty times improvement to previous reports. The refractive index detection limit is 3.5*10^-6 RIU at 1 s integration time. We also describe a novel glue-and-strip process to transfer gold nano structures onto fiber end facets.
description: 18pages, 5 figures
The Impact of Albedo Measurements on Power Density Calculations of Bifacial Modules
Creators: name: Grommes, E.
name: Blieske, U.
name: Müller-Ost, J.
Publisher: name: WIP
Year: 2020
Subjects: PV Systems and Storage – Modelling, Design, Operation and Performance
Solar Resource and Forecasting

description: 37th European Photovoltaic Solar Energy Conference and Exhibition; 1228-1232
description: The impact of the averaged albedo and the according uncertainties in measurements on the energy density of bifacial systems are investigated. The overall uncertainty ± in the given example is calculated. Considering an average albedo value of 0.25 in the period of two hours, the albedo range is between 0.238 and 0.263 for green grass on the campus of the TH Köln. The relative error is -4.93 % and +5.18 %. Considering a power density calculation applying the One-Diode-Model, this equals a power density range of +/- 4.81 %. An additional error is derived out of the comparison of an average albedo model to a resolved albedo model, it concludes in a 3.6996 % higher mean albedo over the year, which resolves in a 1.1151 % higher power density.
Cavity-ligand binding in a simple two-dimensional water model
Creators: name: Mazovec, G.
name: Lukšič, M.
name: Hribar-Lee, B.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: By means of Monte Carlo computer simulations in the isothermal-isobaric ensemble, we investigated the interaction of a hydrophobic ligand with the hydrophobic surfaces of various curvatures (planar, convex and concave). A simple two-dimensional model of water, hydrophobic ligand and surface was used. Hydration/dehidration phenomena concerning water molecules confined close to the molecular surface were investigated. A notable dewetting of the hydrophobic surfaces was observed together with the reorientation of the water molecules close to the surface. The hydrogen bonding network was formed to accommodate cavities next to the surfaces as well as beyond the first hydration shell. The effects were most strongly pronounced in the case of concave surfaces having large curvature. This simplified model can be further used to evaluate the thermodynamic fingerprint of the docking of hydrophobic ligands.
description: 6 pages, 5 figures
Computational issues in chemo-dynamical modelling of the formation and evolution of galaxies
Creators: name: Revaz, Yves
name: Arnaudon, Alexis
name: Nichols, Matthew
name: Bonvin, Vivien
name: Jablonka, Pascale
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Chemo-dynamical N-body simulations are an essential tool for understanding the formation and evolution of galaxies. As the number of observationally determined stellar abundances continues to climb, these simulations are able to provide new constraints on the early star formaton history and chemical evolution inside both the Milky Way and Local Group dwarf galaxies. Here, we aim to reproduce the low $α$-element scatter observed in metal-poor stars. We first demonstrate that as stellar particles inside simulations drop below a mass threshold, increases in the resolution produce an unacceptably large scatter as one particle is no longer a good approximation of an entire stellar population. This threshold occurs at around $10^3\,\rm{M_\odot}$, a mass limit easily reached in current (and future) simulations. By simulating the Sextans and Fornax dwarf spheroidal galaxies we show that this increase in scatter at high resolutions arises from stochastic supernovae explosions. In order to reduce this scatter down to the observed value, we show the necessity of introducing a metal mixing scheme into particle-based simulations. The impact of the method used to inject the metals into the surrounding gas is also discussed. We finally summarise the best approach for accurately reproducing the scatter in simulations of both Local Group dwarf galaxies and in the Milky Way.
description: 23 pages, 18 figures, accepted for publication in Astronomy and Astrophysics