cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Innovative Recycling of End of Life Silicon PV Panels: Materials Recovering and Glass Re-Use
Creators: name: Audoin, C.
name: Cerchier, P.
name: Brunelli, K.
name: Pezzato, L.
name: Dabala, M.
name: Tammaro, M.
name: Sabia, G.
name: Attanasio, A.
name: Nisi, A.
name: Sessa, T.
name: Suitner, H.
name: Rakotoniaina, J.P.
Publisher: name: WIP
Year: 2019
Subjects: Photovoltaic Modules and BoS Components
Sustainability and Recycling

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 1247-1251
description: Photovoltaic (PV) technology is one of the most rising technologies for improving energy security and mitigating climate change. The PV market is growing rapidly, and further market expansion is expected all over the world. In Europe, from 2020 on, an increasing amount of End of Life (EoL) Photovoltaic Panels will accumulate. This will represent a new type of waste which will show opportunities and challenges. Nowadays, this type of waste is addressed mostly to landfill, even though it contains valuable raw materials. ReSiELP is an EIT KIC Raw Material project, funded by the EIT, striving to recover valuable materials contained in the PV modules. EoL PV panels waste will be treated by a pilot plant implemented during the project lifetime. The first results obtained by the plant showed that the materials can be recovered with high efficiency on industrial scale. Treatment of the wastewaters at lab-scale has been studied in order to reduce waste and recover valuable-resources in a circular economy perspective. All the recovered materials will be reinjected in their appropriate value chain. Recovered glass is mechanically processed and sieved in different sizes to be re-used in building materials production and promising results have been obtained.
Software Correction of Angular Misalignments of Tilted Reference Solar Cells Using Clear-Sky Satellite Open Data
Creators: name: Barbier, T.
name: Blanc, P.
name: Saint-Drenan, Y.-M.
Publisher: name: WIP
Year: 2019
Subjects: PV Systems and Storage – Modelling, Design, Operation and Performance
Operation, Performance and Maintenance of PV Systems

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 1664-1666
description: In-situ measurements for photovoltaic systems are very sensitive to angular misalignments. It can lead to errors in many steps of a photovoltaic (PV) project. In this paper, we propose a simple and robust method to estimate and correct a posteriori the angular misalignment of tilted reference solar cells or pyranometers. The method uses output of the clear-sky irradiance model McClear, a free Copernicus Atmospheric Monitoring Service. We applied the method in 6-month data composed of 7 different tilted reference solar cells. We find that angular misalignment estimation found in the case study are meaningful. Finally, we showed the angular correction found improves satellite-based estimation of GTI for the 6 following months of data for clear sky days, for both RMSE and bias indicators.
$d$-Regular graphs of acyclic chromatic index at least $d+2$
Creators: name: Basavaraju, Manu
name: Chandran, L. Sunil
name: Kummini, Manoj
Publisher: name: arXiv
Year: 2008
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: An $acyclic$ edge coloring of a graph is a proper edge coloring such that there are no bichromatic cycles. The \emph{acyclic chromatic index} of a graph is the minimum number k such that there is an acyclic edge coloring using k colors and is denoted by $a'(G)$. It was conjectured by Alon, Sudakov and Zaks (and earlier by Fiamcik) that $a'(G)\le Δ+2$, where $Δ=Δ(G)$ denotes the maximum degree of the graph. Alon et.al also raised the question whether the complete graphs of even order are the only regular graphs which require $Δ+2$ colors to be acyclically edge colored. In this paper, using a simple counting argument we observe not only that this is not true, but infact all d-regular graphs with $2n$ vertices and $d > n$, requires at least $d+2$ colors. We also show that $a'(K_{n,n}) \ge n+2$, when $n$ is odd using a more non-trivial argument(Here $K_{n,n}$ denotes the complete bipartite graph with $n$ vertices on each side). This lower bound for $K_{n,n}$ can be shown to be tight for some families of complete bipartite graphs and for small values of $n$. We also infer that for every $d,n$ such that $d \ge 5$, $n \ge 2d + 3$ and $dn$ even, there exist $d$-regular graphs which require at least $d+2$-colors to be acyclically edge colored.
description: 4 pages
The Hook Mill and Strong Blacksmith Shop
Creators: name: Brainard, George Bradford
Publisher: name: Unknown
Year: 0
Subjects: Photographs
Photos
Historic buildings
East Hampton
Structures
Dwellings
Forge shops
Blacksmiths
Hook Mill

description: This images shows a distant view of Hook Mill and the Strong Blacksmith Shop. This image was printed from a glass plate negative courtesy of The Brooklyn Public Library and this reproduction was collected sometime from 1970 to 1982 as part of the East Hampton’s Heritage Photo Collection.
description: Images within East Hampton Heritage Photo Collection seem to have been taken or collected in relation to the East Hampton Heritage project, but not all of them were included in the final publication. Several photographer are included in this collection.
Development of Conductive Backsheet for Manufacture of PV Modules with Back-Contact Cells
Creators: name: Meijers, G.J.W.
name: Bennett, I.J.
Publisher: name: WIP
Year: 2019
Subjects: Photovoltaic Modules and BoS Components
PV Module Design, Manufacture, Performance and Reliability

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 1095-1097
description: Back-contact solar modules have been shown to have several advantages when compared with conventional tabbed modules including a higher power output and highly automated production. Back-contact cells and modules have the highest power output and are predicted to retain this advantage for the coming years [1, 2]. The most developed technology for integration of back-contact cells in a back-contact module is by using a conductive backsheet (CBS). In this article, the importance of the overall flatness of the CBS for ease of module manufacture and module quality is discussed.
Building Blocks Development for Defect-Free Growth of GaAs on Silicon for Tandem Solar Cells
Creators: name: Mencaraglia, D.
name: Renard, C.
name: Connolly, J.P.
name: Cherkashin, N.
name: Hallais, G.
name: Jaffré, A.
name: Alvarez, J.
name: Chau, G.
name: Vincent, L.
name: Kleider, J.-P.
name: Hamouda, F.
name: Bouchier, D.
Publisher: name: WIP
Year: 2019
Subjects: Perovskites, other Non-Silicon-Based Photovoltaics and Multi-Junction Devices
Tandems

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 753-756
description: The monolithic integration on silicon of GaAs, and more generally of III-V semiconductors, is a very attractive and promising route for the production of high efficiencies multijunctions devices in the manner of those developed for space applications on germanium, but at a much lower cost suitable for terrestrial PV applications. The purpose of this paper is to present the building blocks we have developed for defect-free growth of GaAs on silicon for tandem solar cell applications. This will be addressed from the technological point of view as well as from design, modelling and characterization perspectives. Preliminary work has allowed the identification of critical technological bottlenecks, following which solution routes have been developed as will be presented and discussed. The resulting design for a GaAs/Si tandem solar cell will then be described.
Modelling low charge ions in the solar atmosphere
Creators: name: Dufresne, R. P.
name: Del Zanna, G.
name: Storey, P. J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Extensions have been made recently to the coronal approximation for the purpose of modelling line emission from carbon and oxygen in the lower solar atmosphere. The same modelling is used here for other elements routinely observed in the solar transition region: N, Ne, Mg, Si and S. The modelling includes the effects of higher densities suppressing dielectronic recombination and populating long-lived, metastable levels; the presence of metastable levels typically causes effective ionisation rates to increase and recombination rates to decrease. Processes induced by the radiation field, namely photo-ionisation and photo-excitation, have been included, along with charge transfer, which occurs when electrons are exchanged during atom-ion and ion-ion collisions. The resulting ion balances are shown, and indicate significant changes compared to the frequently-employed coronal approximation. The effect on level populations within ions caused by photo-excitation is also assessed. To give an illustration of how line emission could be altered by these processes, selected line contribution functions are presented at the end.
description: Accepted in MNRAS, 15 pages, 13 figures
Sequential deconfinement of quark flavors in neutron stars
Creators: name: Blaschke, D.
name: Sandin, F.
name: Klahn, T.
name: Berdermann, J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Theory (nucl-th)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We suggest a scenario where the three light quark flavors are sequentially deconfined under increasing pressure in cold asymmetric nuclear matter as found, e.g., in neutron stars. The basis for our analysis is a chiral quark matter model of Nambu--Jona-Lasinio (NJL) type with diquark pairing in the spin-1 single flavor (CSL), spin-0 two flavor (2SC) and three flavor (CFL) channels. We find that nucleon dissociation sets in at about the saturation density, n_0, when the down-quark Fermi sea is populated (d-quark dripline) due to the flavor asymmetry induced by beta-equilibrium and charge neutrality. At about 3n_0 u-quarks appear and a two-flavor color superconducting (2SC) phase is formed. The s-quark Fermi sea is populated only at still higher baryon density, when the quark chemical potential is of the order of the dynamically generated strange quark mass. We construct two different hybrid equations of state (EoS) using the Dirac-Brueckner Hartree-Fock (DBHF) approach and the EoS by Shen et al. in the nuclear matter sector. The corresponding hybrid star sequences have maximum masses of, respectively, 2.1 and 2.0 M_sun. Two- and three-flavor quark-matter phases exist only in gravitationally unstable hybrid star solutions in the DBHF case, while the Shen-based EoS produce stable configurations with a 2SC phase-component in the core of massive stars. Nucleon dissociation via d-quark drip could act as a deep crustal heating process, which apparently is required to explain superbusts and cooling of X-ray transients.
description: 9 pages, 7 figures, 1 figure removed, section IV revised, references added
Thermal entanglement in a two-qutrit system with nonlinear coupling under nonuniform external magnetic field
Creators: name: Sargolzahi, Iman
name: Mirafzali, Sayyed Yahya
name: Sarbishaei, Mohsen
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the thermal entanglement of a 2-qutrit spin chain with nonlinear coupling in the presence of nonuniform magnetic field. Thermal entanglement of an arbitrary (finite dimensional) m-partite system vanishes at some finite threshold temperature T_s. We investigate the dependence of T_s on the system's parameters, i.e. the nonlinear coupling and the magnetic field, for this 2-qutrit system. In addition, we compare two lower bounds of I-concurrence for this system and also study its dense coding capacity as a function of system's parameters.
description: 18 pages, 6 figures; The revised version, Some more sections and references are added
Potential for Crowdsourced Weather Stations to Assess Intra-Hourly Variability of Photovoltaic Systems
Creators: name: Lopez Lorente, J.
name: Liu, X.
name: Morrow, D.J.
name: Brogan, P.V.
Publisher: name: WIP
Year: 2019
Subjects: PV Systems and Storage – Modelling, Design, Operation and Performance
Solar Resource and Forecasting

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 1410-1416
description: Solar power has seen significant growth in energy markets in recent years, driven largely by a substantial drop in cost. An issue with high penetrations of solar is that it, more than most other sources of energy, is liable to extreme intermittency as clouds pass over and irradiance varies. It is often difficult to assess the problem of solar intermittency as meteorological and PV generation data often lack the temporal and spatial resolution required. This investigation utilises crowd sourced meteorological data from personal weather stations, with known coordinates and five-minute resolution. The correlation between publicly available average half hour irradiance data, from weather stations and publicly available half hourly PV generation data, is analysed. A high degree of correlation is found between irradiance data from personal weather stations interpolated to the PV plants’ location and PV output over a wide range of conditions. This result allows estimation of intermittency in PV output in five-minute, rather than half hour, increments. Estimates of variation in PV output over full sun (clear sky days), intermittent sun and no sun (overcast) days are presented. This investigation is intended to study potentially undesirable effects of phase angle variation due to PV intermittency and how these problems could be alleviated with battery energy storage.
Effect of linear density of states on the quasi-particle dynamics and small electron-phonon coupling in graphite
Creators: name: Leem, C. S.
name: Kim, B. J.
name: Kim, Chul
name: Park, S. R.
name: Ohta, T.
name: Bostwick, A.
name: Rotenberg, E.
name: Kim, H. -D.
name: Kim, M. K.
name: Choi, H. J.
name: Kim, C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We obtained the spectral function of very high quality natural graphite single crystals using angle resolved photoelectron spectroscopy (ARPES). A clear separation of non-bonding and bonding bands and asymmetric lineshape are observed. The asymmetric lineshapes are well accounted for by the finite photoelectron escape depth and the band structure. The extracted width of the spectral function (inverse of the photohole life time) near the K point is, beyond the maximum phonon energy, approximately proportional to the energy as expected from the linear density of states near the Fermi energy. The upper bound for the electron-phonon coupling constant is about 0.2, a much smaller value than the previously reported one.
description: 7 pages, 7 figures
Aerodynamic Prediction of High-Lift Configuration Using k-(v^2 )-ω Turbulence Model
Creators: name: Zhang, Shaoguang
name: Li, Haoran
name: Zhang, Yufei
name: Chen, Haixin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The aerodynamic performance of the high-lift configuration greatly influences the safety and economy of commercial aircraft. Accurately predicting the aerodynamic performance of the high-lift configuration, especially the stall behavior, is important for aircraft design. However, the complex flow phenomena of high-lift configurations pose substantial difficulties to current turbulence models. In this paper, a three-equation k-(v^2)-ω turbulence model for the Reynolds-averaged Navier-Stokes equations is used to compute the stall behavior of high-lift configurations. A separated shear layer fixed function is implemented in the turbulence model to better capture the nonequilibrium characteristics of turbulence. Different high-lift configurations, including the two-dimensional multielement NLR7301 and Omar airfoils and a complex full-configuration model (JAXA Standard Model), are numerically tested. The results indicate that the effect of the nonequilibrium characteristics of turbulence is significant in the free shear layer, which is key to accurately predicting the stall behavior of high-lift devices. The modified SPF k-(v^2 )-ω model is more accurate in predicting stall behavior than the Spalart-Allmaras, shear stress transport, and original k-(v^2)-ω models for the full high-lift configuration. The relative errors in the predicted maximum lift coefficients are within 3% of the experimental data.
description: 27 pages
Circular Part-to-Whole Charts Using the Area Visual Cue
Creators: name: Kosara, Robert
Publisher: name: The Eurographics Association
Year: 2019

description: Studies of chart types can reveal unexplored design spaces, like the circular diagrams used in recent studies on pie charts. In this paper, we explore several variations of part-to-whole charts that use area to represent a fraction within a circle. We find one chart that performs very similarly to the pie chart, even though it is visually more complex. Centered shapes turn out to lead to much worse accuracy than any other stimuli, even the same shape when not centered. These first results point to the need for more systematic explorations of the design spaces around existing charts.
description: EuroVis 2019 - Short Papers
description: Design and Evaluation
description: 13
description: 17
description: Robert Kosara
The Human User in Progressive Visual Analytics
Creators: name: Micallef, Luana
name: Schulz, Hans-Jörg
name: Angelini, Marco
name: Aupetit, Michaël
name: Chang, Remco
name: Kohlhammer, Jörn
name: Perer, Adam
name: Santucci, Giuseppe
Publisher: name: The Eurographics Association
Year: 2019
Subjects: Human
centered computing
Visual analytics
Social and professional topics
User characteristics

description: The amount of generated and analyzed data is ever increasing, and processing such large data sets can take too long in situations where time-to-decision or fluid data exploration are critical. Progressive visual analytics (PVA) has recently emerged as a potential solution that allows users to analyze intermediary results during the computation without waiting for the computation to complete. However, there has been limited consideration on how these techniques impact the user. Based on discussions from a Dagstuhl seminar held in October 2018, this paper characterizes PVA users by their common roles, their main tasks, and their distinct focus of analysis. It further discusses cognitive biases that play a particular role in PVA. This work will help PVA visualization designers in devising systems that are tailored for their specific target users and their characteristics.
description: EuroVis 2019 - Short Papers
description: Design and Evaluation
description: 19
description: 23
description: Luana Micallef, Hans-Jörg Schulz, Marco Angelini, Michaël Aupetit, Remco Chang, Jörn Kohlhammer, Adam Perer, and Giuseppe Santucci
description: CCS Concepts: Human-centered computing --> Visual analytics;  Social and professional topics --> User characteristics
การศึกษาประสิทธิผลของระบบสารสนเทศเพื่อการบริหารจัดการ (MIS) มหาวิทยาลัยมหาสารคาม
Creators: name: ประไพ อุนารัตน์
Publisher: name: มหาวิทยาลัยมหาสารคาม
Year: 2556
Subjects: ประสิทธิผล, ระบบสารสนเทศ

description: 1, 4, วารสารสาระคาม
Visualizing Transportation Flows with Mode Split using Glyphs
Creators: name: Pérez-Messina, Ignacio
name: Graells-Garrido, Eduardo
Publisher: name: The Eurographics Association
Year: 2019
Subjects: Human
centered computing
Information visualization
Visual analytics

description: The increasing trend of using unconventional data in urban planning environments has led to the need for developing systems that can visualize this data. Here we present a visualization for studying commuting flows within a city, with a particular focus on the distribution of mode of transportation usage. Our design, called ModalCell, uses a glyph-based flow map to show a city's flows considering mode split, direction, and distance range. We evaluate ModalCell with a pilot survey and a use case that shows the potential of the approach to make flows within a city visible and understandable.
description: EuroVis 2019 - Short Papers
description: Design and Evaluation
description: 25
description: 29
description: Ignacio Pérez-Messina and Eduardo Graells-Garrido
description: CCS Concepts: Human-centered computing --> Information visualization; Visual analytics
Color Names Across Languages: Salient Colors and Term Translation in Multilingual Color Naming Models
Creators: name: Kim, Younghoon
name: Thayer, Kyle
name: Gorsky, Gabriella Silva
name: Heer, Jeffrey
Publisher: name: The Eurographics Association
Year: 2019
Subjects: Human
centered computing
Visualization design and evaluation methods
Visualization systems and tools

description: Color names facilitate the identification and communication of colors, but may vary across languages. We contribute a set of human color name judgments across 14 common written languages and build probabilistic models that find different sets of nameable (salient) colors across languages. For example, we observe that unlike English and Chinese, Russian and Korean have more than one nameable blue color among fully-saturated RGB colors. In addition, we extend these probabilistic models to translate color terms from one language to another via a shared perceptual color space. We compare Korean-English translations from our model to those from online translation tools and find that our method better preserves perceptual similarity of the colors corresponding to the source and target terms. We conclude with implications for visualization and future research.
description: EuroVis 2019 - Short Papers
description: Design and Evaluation
description: 31
description: 35
description: Younghoon Kim, Kyle Thayer, Gabriella Silva Gorsky, and Jeffrey Heer
description: CCS Concepts: Human-centered computing --> Visualization design and evaluation methods; Visualization systems and tools
ความคิดเห็นของเจ้าหน้าที่ที่รับผิดชอบความเสี่ยงของหน่วยงานที่มีต่อการนำระบบการบริหารความเสี่ยงเข้ามาใช้ในองค์กร
Creators: name: เพ็ญพิชญา บรรหาร
Publisher: name: มหาวิทยาลัยมหาสารคาม
Year: 2556
Subjects: ความคิดเห็นของเจ้าหน้าที่ที่รับผิดชอบความเสี่ยง, ระบบบริหารความเสี่ยงองค์กร

description: 1, 4, วารสารสาระคาม
Linear stability analysis of hypersonic boundary layers computed by a kinetic approach: A semi-infinite flat plate at Mach 4.5 and 9
Creators: name: Klothakis, Angelos
name: Quintanilha, Helio
name: Sawant, Saurabh S.
name: Protopapadakis, Eftychios
name: Theofilis, Vassilis
name: Levin, Deborah A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Linear stability analysis is performed using a combination of two-dimensional Direct Simulation Monte Carlo (DSMC) method for the computation of the basic state and solution of the pertinent eigenvalue problem, as applied to the canonical boundary layer on a semi-infinite flat plate. Three different gases are monitored, namely nitrogen, argon and air, the latter as a mixture of 79\% Nitrogen and 21\% Oxygen at a range of free-stream Mach numbers corresponding to flight at an altitude of 55km. A neural network has been utilised to predict and smooth the raw DSMC data; the steady laminar profiles obtained are in very good agreement with those computed by (self-similar) boundary layer theory, under isothermal or adiabatic wall conditions, subject to the appropriate slip corrections computed in the DSMC method. The leading eigenmode results pertaining to the unsmoothed DSMC profiles are compared against those of the classic boundary layer theory. Small quantitative, but no significant qualitative differences between the results of the two classes of steady base flows have been found at all parameters examined. The frequencies of the leading eigenmodes at all conditions examined are practically identical, while perturbations corresponding to the DSMC profiles are found to be systematically more damped than their counterparts arising in the boundary layer at the conditions examined, when the correct velocity slip and temperature jump boundary conditions are imposed in the base flow profiles; by contrast, when the classic no-slip boundary conditions are used, less damped/more unstable profiles are obtained, which would lead the flow to earlier transition. On the other hand, the DSMC profiles smoothed by the neural network are marginally more stable than their unsmoothed counterparts.
Highly Efficient Controlled Hierarchical Data Reduction techniques for Interactive Visualization of Massive Simulation Data
Creators: name: Dubois, Jérôme
name: Lekien, Jacques-Bernard
Publisher: name: The Eurographics Association
Year: 2019
Subjects: General and reference
Design
Performance
Evaluation
Human
centered computing
Visualization
Software and its engineering
Designing software
Information systems
Data compression

description: With the constant increase in compute power of supercomputers, high performance computing simulations are producing higher fidelity results and possibly massive amounts of data. To keep visualization of such results interactive, existing techniques such as Adaptive Mesh Refinement (AMR) can be of use. In particular, Tree-Based AMR methods (TB-AMR) are widespread in simulations and are becoming more present in general purpose visualization pipelines such as VTK. In this work, we show how TB-AMR data structures could lead to more efficient exploration of massive data sets in the Exascale era. We discuss how algorithms (filters) should be designed to take advantage of tree-like data structures for both data filtering or rendering. By introducing controlled hierarchical data reduction we greatly reduce the processing time for existing algorithms, sometimes with no visual impact, and drastically decrease exploration time for analysts. Also thanks to the techniques and implementations we propose, visualization of very large data is made possible on very constrained resources. These ideas are illustrated on million to billion-scale native TB-AMR or resampled meshes, with the HyperTreeGrid object and associated filters we have recently optimized and made available in the Visualisation Toolkit (VTK) for use by the scientific community.
description: EuroVis 2019 - Short Papers
description: Volume, Simulation, and Data Reduction
description: 37
description: 41
description: Jérôme Dubois and Jacques-Bernard Lekien
description: CCS Concepts: General and reference --> Design; Performance; Evaluation;  Human-centered computing --> Visualization;  Software and its engineering --> Designing software;  Information systems --> Data compression
Evaluation of Soiling Effects on PV Modules and Development of Innovative Low Cost Cleaning Solutions: Some Outputs of Soleil Inno-PV Project
Creators: name: Barhdadi, A.
name: Dahlioui, D.
name: Laarabi, B.
name: Alaoui, S.M.
name: Rhourri, M.
name: Rouas, Y.
name: Said, A.
name: Boardman, J.
name: Dambrine, G.
name: Menard, E.
Publisher: name: WIP
Year: 2019
Subjects: PV Systems and Storage – Modelling, Design, Operation and Performance
Operation, Performance and Maintenance of PV Systems

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 1317-1323
description: This paper summarizes some results obtained from the studies performed in the framework of SOLEIL Inno-PV project co-funded by the Moroccan Institute for Research in Solar Energy and New Energies (IRESEN). This project is focused on the study of soiling impact on PV panels and development of innovative low cost cleaning solutions. We start by presenting an experimental simulation of the effects of soiling on solar PV glass using a test bench that we have performed at home laboratory. The first tests conducted on this bench have been validated by other experimental studies performed in outdoor conditions. From the results obtained it has been concluded that the test bench developed has approached the mechanism of the deposition of soiling phenomenon. After, an experimental approach to evaluate the soiling rate via the performance ratio using solar front-glass has been detailed. The aim of this study is to present a simple and low cost soiling measurement protocol for PV modules. A comprehensive study of exposed solar glass samples according to two different exposition angles 0° and 45° has been also conducted. The study has included a close comparison of soiling distribution and optical transmittance of the samples. This was analyzed by presentation of the loss trend due to soiling and which has marked 2.25% during two months of dry period. In the last part of the work, an innovative and very low cost cleaning technique for dynamic photovoltaic panels on solar bi-axial tracker produced by Helioslite was developed and implemented. This relevant and competitive technique doesn't need any energy supply because it works using only the force of gravity. The cleaning tests were carried out and validated using an optimal design of the cleaning system prototype of the real bi-axial tracker that has been developed locally. The results of the tests have been taken into consideration to realize the cleaning technique in real dimensions and normal operating conditions.
Electronic Properties of Graphene Nanoribbon on Si(001) Substrate
Creators: name: Zhang, Zhuhua
name: Guo, Wanlin
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We show by first-principles calculations that the electronic properties of zigzag graphene nanoribbons (Z-GNRs) adsorbed on Si(001) substrate strongly depend on ribbon width and adsorption orientation. Only narrow Z-GNRs with even rows of zigzag chains across their width adsorbed perpendicularly to the Si dimer rows possess an energy gap, while wider Z-GNRs are metallic due to width-dependent interface hybridization. The Z-GNRs can be metastably adsorbed parallel to the Si dimer rows, but show uniform metallic nature independent of ribbon width due to adsorption induced dangling-bond states on the Si surface.
description: 13 pages, 3 figures
An evaluation of a course on social and cultural issues in counselling
Creators: name: Brooks, Geraldine Susan
Publisher: name: University of British Columbia
Year: 2010

description: This experimental research study investigated how effectively a Master's level course on social and cultural issues in counselling influenced students' levels of ethnic awareness, sex role behaviours and behavioural intentions, and attitudes toward women. Professional psychological and counselling associations have strongly advocated that counsellor education programs incorporate courses focusing on social and cultural issues into their curricula. The study was based on the following general research question. It is hypothesized that a positive relationship exists between (on the one hand) counselling students' participation in a training course on social and cultural issues in counselling and (on the other hand) their levels of ethnic awareness, non-sexist attitudes toward women, and non-traditional sex role behaviours and behavioural intentions. The impact of the course was assessed through the use of the Wayne Ethnic Awareness Measure, the Robinson Behavioral Inventory, and the Therapists' Attitudes Toward Women Scale. These instruments were administered in a pre- and post-test format to 16 students who were enrolled in the experimental course and 15 students who were enrolled in a comparable level course on counselling theories and interventions. Six months after the post-test, brief follow-up interviews were conducted with seven volunteers from the experimental group. Statistical analyses of the data indicated that there were no significant differences in levels of cultural awareness, sex role behaviours or behavioural intentions, or attitudes toward women, between the experimental and the comparison groups at the time of the post-test. The results also revealed that, overall, participants had relatively low levels of cultural awareness and relatively high levels of feminist consciousness based on previously reported results for the instruments used. These findings imply that the experimental course should be modified to more effectively address its training objectives, particularly as they pertain to cross-cultural issues.
Newcoming Citizen Photovoltaic Projects in Ile De France
Creators: name: Blondel, C.
name: Le Roux, T.
name: Lincot, D.
name: Harada, N.
name: Blanc, B.
name: Le Huérou, A.
name: Blondel, F.-M.
name: Hervé, G.
name: Macchi, G.
Publisher: name: WIP
Year: 2019
Subjects: Finance, Markets and Policies
Policies and Scenarios for Renewables, Societal and Global Challenges

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 2030-2032
description: Citizen cooperatives aiming to accelerate the energy transition have appeared in recent years in the Île de France region (Paris area). They have decided to implement PV installations, mainly on the roofs of primary and secondary schools with several MW short term objective. These implementations will be accompanied with pedagogical projects on energy transition. The citizen associations are distributed in different zones of the region, covering several cities with multiple links to the inhabitants, associations and local and national institutions. While developing specific characteristics related to their history and local environment, they share common objectives and develop multiple links between themselves. They are also federated in a non-governmental organization named Energie Partagée, which is very active at the national level to enhance renewable energy projects by the citizenry. This paper will present the main features of this network with a focus on the association created in the south area of Ile de France named Sud Paris Soleil.
The Modal Logic of Stepwise Removal
Creators: name: van Benthem, Johan
name: Mierzewski, Krzysztof
name: Blando, Francesca Zaffora
Publisher: name: arXiv
Year: 2021
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Logic (math.LO)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: 03B45, 03B42

description: We investigate the modal logic of stepwise removal of objects, both for its intrinsic interest as a logic of quantification without replacement, and as a pilot study to better understand the complexity jumps between dynamic epistemic logics of model transformations and logics of freely chosen graph changes that get registered in a growing memory. After introducing this logic ($\textsf{MLSR}$) and its corresponding removal modality, we analyze its expressive power and prove a bisimulation characterization theorem. We then provide a complete Hilbert-style axiomatization for the logic of stepwise removal in a hybrid language enriched with nominals and public announcement operators. Next, we show that model-checking for $\textsf{MLSR}$ is PSPACE-complete, while its satisfiability problem is undecidable. Lastly, we consider an issue of fine-structure: the expressive power gained by adding the stepwise removal modality to fragments of first-order logic.
Cahiers de recherches médiévales et humanistes / Journal of Medieval and Humanistic Studies. 2013 - 2, n° 26
Creators: name: (:Unap)
Publisher: name: Classiques Garnier
Year: 2014
Subjects: subject: Moyen Âge
subject: Renaissance
subject: Histoire
subject: Littérature
subject: Histoire de sciences
subject: Histoire du droit
subject: Histoire des religions

description: Contributeurs : Christelle Chaillou-Amadieu, Christopher Callahan, Alain Corbellari, Pierre Courroux, Martina Di Febo, Pascale Duhamel, Isabelle Durand-Le Guern, Isabelle Fabre, Jean-Marie Fritz, Guillaume Gross, Madeleine Guy, John Haines, Chloé Lelong, Julien Lepot, Sonia Maura Barillari, Daniel O'Sullivan, Gilles Polizzi, Yolande de Pontfarcy Sexton et Myriam White-Le Goff.
DABT: A Dependency-aware Bug Triaging Method
Creators: name: Jahanshahi, Hadi
name: Chhabra, Kritika
name: Cevik, Mucahit
name: Başar, Ayşe
Publisher: name: arXiv
Year: 2021
Subjects: subject: Software Engineering (cs.SE)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: In software engineering practice, fixing a bug promptly reduces the associated costs. On the other hand, the manual bug fixing process can be time-consuming, cumbersome, and error-prone. In this work, we introduce a bug triaging method, called Dependency-aware Bug Triaging (DABT), which leverages natural language processing and integer programming to assign bugs to appropriate developers. Unlike previous works that mainly focus on one aspect of the bug reports, DABT considers the textual information, cost associated with each bug, and dependency among them. Therefore, this comprehensive formulation covers the most important aspect of the previous works while considering the blocking effect of the bugs. We report the performance of the algorithm on three open-source software systems, i.e., EclipseJDT, LibreOffice, and Mozilla. Our result shows that DABT is able to reduce the number of overdue bugs up to 12\%. It also decreases the average fixing time of the bugs by half. Moreover, it reduces the complexity of the bug dependency graph by prioritizing blocking bugs.
description: This paper is accepted at EASE'21: The International Conference on Evaluation and Assessment in Software Engineering; June 21--23, 2021
ReLVis: Visual Analytics for Situational Awareness During Reinforcement Learning Experimentation
Creators: name: Saldanha, Emily
name: Praggastis, Brenda
name: Billow, Todd
name: Arendt, Dustin L.
Publisher: name: The Eurographics Association
Year: 2019
Subjects: Human
centered computing
Visualization systems and tools
Computing methodologies
Reinforcement learning
Computational control theory

description: Reinforcement learning (RL) is a branch of machine learning where an agent learns to maximize reward through trial and error. RL is challenging and data/compute intensive leading practitioners to become overwhelmed and make poor modeling decisions. Our contribution is a Visual Analytics tool designed to help data scientists maintain situation awareness during RL experimentation. Our tool allows users to understand which hyper-parameter values lead to better or worse outcomes, what behaviors are associated with high and low reward, and how behaviors evolve throughout training. We evaluated our tool through three uses cases using state of the art deep RL models demonstrating how our tool leads to RL situation awareness.
description: EuroVis 2019 - Short Papers
description: Volume, Simulation, and Data Reduction
description: 43
description: 47
description: Emily Saldanha, Brenda Praggastis, Todd Billow, and Dustin L. Arendt
description: CCS Concepts: Human-centered computing --> Visualization systems and tools;  Computing methodologies --> Reinforcement learning; Computational control theory
Design Evaluation of Customized Building Integration Photovoltaic Prototypes in Hot Climates
Creators: name: Efurosibina Attoye, D.
name: Tabet Aoul, K.A.
name: Hassan, A.
Publisher: name: WIP
Year: 2019
Subjects: PV Applications and Integration
PV on/in Buildings, Infrastructure, Landscape, Water and Nature

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 1832-1837
description: In 2017, the total added capacity of new solar photovoltaics (PV) installations globally was 98GW; outranking the combined contributions of coal, gas and nuclear power in the same year. Building Integrated Photovoltaics (BIPV) is an innovative solar technology, which provides the architect with an eco-friendly strategy towards reducing the negative environmental impact of buildings. Its multi-functional applications include cladding, shading, daylight modulation, aesthetics and thermal control in addition, to energy generation. Existing literature reveals that in spite of its benefits, the adoption of BIPV is limited by knowledge, cost and other technical issues. In a previous study, the potential of custom BIPV to address its limitations was reviewed but without a parametric design for building prototypes. This study seeks to addresses above-stated limitations by developing and evaluating design prototypes for custom BIPV in hot climates. It combines a 4-stage approach with a secondary qualitative evaluation. Stage 1 involves a general evaluation of appropriate passive design strategies using Climate Consultant for the hot climate of Abi Dhabi, UAE. In Stage 2, the impact of building shape and orientation were evaluated using eQuest to guide the early design stage of the prototype residential units. Stage 3 involves a parametric envelope design with REVIT of three (3) prototype BIPV designs. Stage 4 involves a review of the PV output and energy savings using PVWatts. The significant contribution of the study relates to the development of porotypes, comparative analysis of energy output and savings, and the directions deduced for further research based on the quantitative and qualitative findings. This study is part of a larger doctoral dissertation on an architectural perspective towards improving the diffusion of innovative technologies. It serves as a guide for designers, developers and related stakeholders. It is projected that the novel custom BIPV design by user participatory design approach will facilitate the evolution of BIPV designs and increase adoption in the near future.
On the Influence of Advection Cooling during Degradation and Regeneration of Boron-Oxygen Defects Using High Intensities
Creators: name: Herguth, A.
name: Graf, A.
name: Hahn, G.
Publisher: name: WIP
Year: 2019
Subjects: Silicon Materials and Cells
Feedstock, Crystallisation, Wafering, Defect Engineering

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 116-119
description: For the industrial application of the regeneration treatment to mitigate boron-oxygen related lightinduced degradation (BO-LID), the process has to work in just a few seconds. Fortunately, the regeneration process (including both degradation and the actual regeneration phase) can be sped up by both higher charge carrier injection and temperature to fulfill this requirement. Unfortunately, there is an upper temperature limit due to reverse reactions, and higher injection comes at the price of unwanted heating. Hence, it is on the one hand of utmost importance to find measures to keep temperature below a certain threshold while increasing injection by illumination. On the other hand, a quick heat-up into a certain temperature range is required to bring process times down to the second range. Within this contribution, it is shown that temperature and illumination intensity can be decoupled to a certain degree thanks to advection cooling, and how a smart control of high intensity laser illumination and advection cooling can further reduce process times.
A note on the spin-1/2 XXZ chain concerning its relation to the Bose gas
Creators: name: Seel, Alexander
name: Bhattacharyya, Tanaya
name: Göhmann, Frank
name: Klümper, Andreas
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: By considering the one-particle and two-particle scattering data of the spin-1/2 Heisenberg chain at T=0 we derive a continuum limit relating the spin chain to the 1D Bose gas. Applying this limit to the quantum transfer matrix approach of the Heisenberg chain we obtain expressions for the correlation functions of the Bose gas at arbitrary temperatures.
description: continued in 0710.1814 math-ph
Objective Finite-Time Saddles and their Connection to FTLE
Creators: name: Bujack, Roxana
name: Dutta, Soumya
name: Rojo, Irene Baeza
name: Zhang, Duan
name: Günther, Tobias
Publisher: name: The Eurographics Association
Year: 2019
Subjects: Human
centered computing
Scientific visualization

description: Based on an intuitive physical definition of what a finite-time saddle-like behavior is, we derive a mathematical definition. We show that this definition builds the link between two FTLE-based saddle generalizations, which is not only of theoretical interest but also provides a more robust extraction of finite-time saddles.
description: EuroVis 2019 - Short Papers
description: Volume, Simulation, and Data Reduction
description: 49
description: 53
description: Roxana Bujack, Soumya Dutta, Irene Baeza Rojo, Duan Zhang, and Tobias Günther
description: CCS Concepts: Human-centered computing --> Scientific visualization
Highlight Insert Colormaps: Luminance for Focused Data Analysis
Creators: name: Samsel, Francesca
name: Overmyer, Trinity
name: Navrátil, Paul A.
Publisher: name: The Eurographics Association
Year: 2019

description: Color provides the primary conduit through which we extract insight from data visualizations. As the dynamic range of data grows, extracting salient features from surrounding context becomes increasingly challenging. Default colormaps provided by visualization software are poorly suited to perform such reductions of visual data. Here we present sets of highlight insert colormaps (HICs) that provide scientists with the means to quickly and easily render a detailed overview of their data, create detailed scans of their data, and examine the outer ranges of data in detail. This method builds on the long understood discriminatory power of luminance and in the highlight region provides 3x to 10x the discriminative power of common colormaps.
description: EuroVis 2019 - Short Papers
description: Volume, Simulation, and Data Reduction
description: 55
description: 59
description: Francesca Samsel, Trinity Overmyer, and Paul A. Navrátil
Investigation of the Influence of Solar Cell Processing on Structural Defects in HPMC-Si Wafers by Photoluminescence Image Analysis
Creators: name: Haug, H.
name: Syre Wiig, M.
name: Søndenå, C.R.
name: Ryningen, B.
name: Stokkan, G.
name: Søiland, A.K.
name: Mjøs, O.
Publisher: name: WIP
Year: 2019
Subjects: Silicon Materials and Cells
Feedstock, Crystallisation, Wafering, Defect Engineering

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 326-329
description: In this paper we investigate the effect of selected processing steps used in Si solar cell fabrication on the recombination activity of grain boundaries (GBs) and other structural defects in high performance multicrystalline silicon (HPMC-Si) wafers. Such defects can in many cases be improved or completely removed using suitable processes, such as impurity gettering and hydrogen passivation, which is accomplished during existing solar cell production. Here we aim to both improve existing production processes with respect to bulk lifetime, as well as introduce new, dedicated processes designed for defect engineering and material quality improvement of HPMC-Si wafers, thus working towards closing the remaining efficiency gap between multi- and monocrystalline Si wafers. Groups of neighbouring wafers from different HPMC Si ingots, have been passed through various processing steps, and subsequently etched down and re-passivated to assess the bulk lifetime of the final solar cells. Photoluminescence (PL) lifetime imaging are then used to generate lifetime maps before and after a selected contact firing process to investigate the effect of GB hydrogenation during this process. The recombination strength of GBs was quantified by numerical simulations of charge carrier diffusion based on line scans of the carrier lifetime. A simplified performance metric was then used to quantify and correlate the recombination of a large number of GBs to the crystallographic properties of the GBs, measured by a Laue scanner on neighbouring wafers.