cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Adding the MLFM to PVPMC/PVLIB
Creators: name: Ransome, S.
name: Sutterlueti, J.
Publisher: name: WIP
Year: 2022
Subjects: Photovoltaic Modules and BoS Components
PV Module Performance – Modelling, Testing, Standards

description: 8th World Conference on Photovoltaic Energy Conversion; 650-656
description: PVPMC/PVLIB is a global collaborative project headed by Sandia to develop a verified open-source PV modelling library in python. The MLFM (Mechanistic Loss Factors Model) combines the Loss Factors Model LFM (orthogonal, normalised loss calculations from MPPT measurements, iv curves or IEC 61853-like matrices) with the Mechanistic Performance Model MPM (robust, orthogonal, normalised fitting coefficients to LFM losses). The MLFM is being added to PVLIB, this paper describes the new functionality as shown by these models and how to interpret the graphs and datafits. This paper also describes some of the procedures used to add code to PVLIB and aims to encourage others to submit their own PV modelling code following PVLIB’s styles, nomenclature, naming conventions, formatting, guidelines, designs, tests etc.
Spectroscopy of cesium Rydberg atoms in strong radio-frequency fields
Creators: name: Jiao, Yuechun
name: Yang, Zhiwei
name: Li, Jingkui
name: Raithel, Georg
name: Zhao, Jianming
name: Jia, Suotang
Publisher: name: arXiv
Year: 2016
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We study Rydberg atoms modulated by strong radio-frequency (RF) fields with a frequency of 70 MHz. The Rydberg atoms are prepared in a room temperature cesium cell, and their level structure is probed using electromagnetically induced transparency (EIT). As the RF field increases from the weak- into the strong-field regime, the range of observed RF-induced phenomena progresses from AC level shifts through increasingly pronounced and numerous RF-modulation sidebands to complex state-mixing and level-crossings with high-l hydrogen-like states. Weak anharmonic admixtures in the RF field generate clearly visible modifications in the Rydberg-EIT spectra. A Floquet analysis is employed to model the Rydberg spectra, and good agreement with the experimental observations is found. Our results show that all-optical spectroscopy of Rydberg atoms in vapor cells can serve as an antenna-free, atom-based and calibration-free technique to measure and map RF electric fields and to analyze their higher-harmonic contents.
description: 6 pages, 5 figures
Gauss' Law and Non-Linear Plane Waves for Yang-Mills Theory
Creators: name: Tsapalis, A.
name: Politis, E. P.
name: Maintas, X. N.
name: Diakonos, F. K.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate Non-Linear Plane-Wave solutions of the classical Minkowskian Yang-Mills (YM) equations of motion. By imposing a suitable ansatz which solves Gauss' law for the $SU(3)$ theory, we derive solutions which consist of Jacobi elliptic functions depending on an enumerable set of elliptic modulus values. The solutions represent periodic anharmonic plane waves which possess arbitrary non-zero mass and are exact extrema of the non-linear YM action. Among them, a unique harmonic plane wave with a non-trivial pattern in phase, spin and color is identified. Similar solutions are present in the $SU(4)$ case while are absent from the $SU(2)$ theory.
description: 8 pages, 5 figures
Outdoor Energy Performances for Standard and Bi-Facial Modules as well on the Failure Modes Observed in Outdoor Conditions
Creators: name: Ottanà, A.
name: Rametta, F.
name: Gangemi, W.
name: Colletti, C.
name: Di Stefano, A.
name: Canino, A.
name: Foti, M.
name: Gerardi, C.
name: Bizzarri, F.
Publisher: name: WIP
Year: 2022
Subjects: Photovoltaic Modules and BoS Components
PV Module Performance – Modelling, Testing, Standards

description: 8th World Conference on Photovoltaic Energy Conversion; 657-661
description: In this article is reported the outdoor performance evaluation of 3SUN bifacial HJT PV modules carried out in the Enel Green Power Innovation Lab of Catania – Passo Martino. In the analysis in terms of Performace Ratio, a monofacial PV technology is used as a reference, and in order to ensure a fair comparison, different commercial module technologies have been selected and monitored. The present paper aims at demonstrating the superior production of the heterojunction modules due to their higher passivation, better thermal coefficients and highlight the bifacial gain.
Resource allocation using metaheuristic search
Creators: name: Connor, Andy M.
name: Shah, Amit
Publisher: name: arXiv
Year: 2016
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences

description: This research is focused on solving problems in the area of software project management using metaheuristic search algorithms and as such is research in the field of search based software engineering. The main aim of this research is to evaluate the performance of different metaheuristic search techniques in resource allocation and scheduling problems that would be typical of software development projects. This paper reports a set of experiments which evaluate the performance of three algorithms, namely simulated annealing, tabu search and genetic algorithms. The experimental results indicate that all of the metaheuristics search techniques can be used to solve problems in resource allocation and scheduling within a software project. Finally, a comparative analysis suggests that overall the genetic algorithm had performed better than simulated annealing and tabu search.
description: Proceedings of the Fourth International Conference on Computer Science & Information Technology 2014
Affinity Purification couple to Mass Spectrometry (AP-MS)
Creators: name: Ingles-Prieto, Alvaro
name: Liñeiro, Eva
name: Bensimon, Ariel
name: Frommelt, Fabian
name: Mueller, André C.
Publisher: name: Zenodo
Year: 2022
Subjects: Protocol

description: Affinity purification mass spectrometry (AP-MS) is a high-throughput method for the isolation and identification of specific target protein interaction partners. It consists of the selective extraction of multiprotein complexes directly from cell lysates. All protein components of these complexes are then trypsin-digested and identified by nLC-MS/MS. The final output is a protein-protein interaction (PPI) data set.
Picturesque Victoria, British Columbia
Creators: name: :Unav
Publisher: name: University of Victoria Libraries
Year: 2020
Subjects: subject: History
valueUri: http://id.worldcat.org/fast/1411628
subject: Tourism--Marketing
valueUri: http://id.worldcat.org/fast/1153181
subject: Cities and towns
valueUri: http://id.worldcat.org/fast/861748

description: A pamphlet containing black and white photos of different buildings, views, landscapes, and points of interest around Victoria, B.C. including the Provincial Parliament Buildings, Government Street, the harbours, Government House, boats and ships, lumber trade, Beacon Hill Park, and fish canneries among others.
Healthcare IT: Is your Information at Risk?
Creators: name: Donahue, Kimmarie
name: Rahman, Shawon
Publisher: name: arXiv
Year: 2015
Subjects: subject: Cryptography and Security (cs.CR)
subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: Healthcare Information Technology (IT) has made great advances over the past few years and while these advances have enable healthcare professionals to provide higher quality healthcare to a larger number of individuals it also provides the criminal element more opportunities to access sensitive information, such as patient protected health information (PHI) and Personal identification Information (PII). Having an Information Assurance (IA) programallows for the protection of information and information systems and ensures the organization is in compliance with all requires regulations, laws and directive is essential. While most organizations have such a policy in place, often it is inadequate to ensure the proper protection to prevent security breaches. The increase of data breaches in the last few years demonstrates the importance of an effective IA program. To ensure an effective IA policy, the policy must manage the operational risk, including identifying risks, assessment and mitigation of identified risks and ongoing monitoring to ensure compliance
Dynamic Simulation Model of an Air-Based BIPVT Roof Tile System
Creators: name: Clasing, L.
name: Yam, P.H.
name: Ziller, C.
name: Blieske, U.
Publisher: name: WIP
Year: 2022
Subjects: Photovoltaic Modules and BoS Components
PV Module Performance – Modelling, Testing, Standards

description: 8th World Conference on Photovoltaic Energy Conversion; 662-665
description: The application of building-integrated PV roof tiles on residential buildings is gaining increasing attention in recent years. Besides many advantages of these systems, they have one major disadvantage: compared to standard PV systems, there is a lack of rear ventilation and thus the temperature of the PV cells increases. This temperature increase leads to a reduction in the electrical performance and also the lifetime of the modules decreases. In order to reduce the PV cell temperature in such systems, a novel air-based building-integrated PV solar thermal roof tile with active rear ventilation is presented. The aim of this work is to develop and validate a dynamic simulation model for a novel air-based PV and solar thermal roof tile system. The model is developed in order to optimize and assess the overall annual energy yield under real operating conditions. Furthermore, the simulation model is validated by measured experimental data conducted on a test roof with the solar roof tiles under investigation in Cologne, Germany. The Root Mean Square Error of 15 days of validation in June shows a good agreement for outlet air and PV module temperature with 1.78 °C and 2.95 °C, respectively. Finally, time-series simulations are performed with the developed model and an optimized control strategy for a case study. In this case study the solar roof tile systems airduct outlet is coupled to an air-source heat pump. The simulation results reveal seasonal performance factor of 3.4 compared to a reference case with the ambient air inlet of 3.3. The presented model allows us to predict a realistic thermal energy yield of the solar roof tile under real operating conditions and thus assessment of the economic viability.
Angular Momentum of the N2H+ Cores in the Orion A Cloud
Creators: name: Tatematsu, Ken'ichi
name: Ohashi, Satoshi
name: Sanhueza, Patricio
name: Luong, Quang Nguyen
name: Umemoto, Tomofumi
name: Mizuno, Norikazu
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We have analyzed the angular momentum of the molecular cloud cores in the Orion A giant molecular cloud observed in the N2H+ J = 1-0 line with the Nobeyama 45 m radio telescope. We have measured the velocity gradient using position velocity diagrams passing through core centers, and made sinusoidal fitting against the position angle. 27 out of 34 N2H+ cores allowed us to measure the velocity gradient without serious confusion. The derived velocity gradient ranges from 0.5 to 7.8 km/s/pc. We marginally found that the specific angular momentum J/M (against the core radius R) of the Orion N2H+ cores tends to be systematically larger than that of molecular cloud cores in cold dark clouds obtained by Goodman et al., in the J/M-R relation. The ratio beta of rotational to gravitational energy is derived to be beta = 10^{-2.3+/-0.7}, and is similar to that obtained for cold dark cloud cores in a consistent definition. The large-scale rotation of the integral-shaped filament of the Orion A giant molecular cloud does not likely govern the core rotation at smaller scales.
description: 15 pages, 14 figures, 3 tables, Publ. Astron. Soc. Japan, in press
Study of Optical Transmission Losses of Satinated PV Glass
Creators: name: Babin, M.
name: Bertomeu I Baldé, A.
name: Spataru, S.V.
name: Jakobsen, M.L.
name: Thorsteinsson, S.
Publisher: name: WIP
Year: 2022
Subjects: Photovoltaic Modules and BoS Components
PV Module Performance – Modelling, Testing, Standards

description: 8th World Conference on Photovoltaic Energy Conversion; 642-645
description: Satinated glass is an increasingly important component of PV modules, especially in the building integrated (BIPV) sector, where it can contribute to more uniform appearance as well as significantly reduce the risk of glare. Different satination methods, such as wet chemical etching or mechanical abrasion, are available, which can impact the PV-relevant optical parameters in different ways. In order to characterize the associated performance losses, in this study eight different satinated glass types are compared in terms of spectral transmittance, surface morphology, relative transmission loss and angular dependent reflection losses. Measurements show only insignificant transmission losses of < 1 % for acid-etched glass compared to reference PV glass at normal incidence, with significant gains at high incidence angles > 60°. No significant differences between different acid-etched samples can be observed, all featuring homogeneous appearance. Other satination technologies, such as sandblasting or laser-etching show significantly higher transmission and reflection losses at low incidence angles, making them less viable for use in PV applications.
Enhancement of radiative processes in nanofibers with embedded plasmonic nanoparticles
Creators: name: Jurga, Radoslaw
name: Della Sala, Fabio
name: Pisignano, Dario
name: Ciracì, Cristian
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Efficient manipulation and long distance transport of single-photons is a key component in nanoscale quantum optics. In this letter, we study the emission properties of an individual light emitter placed into a nanofiber and coupled to a metallic nanoparticle. We find that plasmonic field enhancement together with the nanofiber optical confinement uniquely and synergistically contribute to an overall increase of emission rates as well as quantum yields.
Application of Electroluminescence Current-Intensity Relation for Estimation of PID Impact in Crystalline Silicon Photovoltaic Module
Creators: name: Kumar, R.
name: Puranik, V.E.
name: Gupta, R.
Publisher: name: WIP
Year: 2022
Subjects: Photovoltaic Modules and BoS Components
PV Module Performance – Modelling, Testing, Standards

description: 8th World Conference on Photovoltaic Energy Conversion; 646-649
description: Potential induced degradation (PID) is a severe degradation mechanism in crystalline silicon photovoltaic (PV) modules which results in significant power loss in a very short duration. Regular monitoring of PID is required for taking preventive actions. Currently, current-voltage (I-V) characteristics and shunt resistance measurement are used for PID impact quantification, while the electroluminescence (EL) imaging technique is used for qualitative investigation only. I-V characteristics and shunt resistance measurement is a hectic task in a PV field as it requires an auxiliary instrument for each module. A new approach to PID impact quantification is investigated in this study which is based on a quantitative analysis of EL images. EL is a spatial technique,so the cell-level investigation is also possible. EL current and intensity are related with a current calibration constant whose value changes with PID progression in a PV cell. This current calibration constant is used as a PID index to estimate the PID impact on a crystalline silicon PV cell.
Tunable photonic cavity coupled to a voltage-biased double quantum dot system: Diagrammatic NEGF approach
Creators: name: Agarwalla, Bijay Kumar
name: Kulkarni, Manas
name: Mukamel, Shaul
name: Segal, Dvira
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate gain in microwave photonic cavities coupled to voltage-biased double quantum dot systems with an arbitrary strong dot-lead coupling and with a Holstein-like light-matter interaction, by adapting the diagrammatic Keldysh nonequilibrium Green's function approach. We compute out-of-equilibrium properties of the cavity : its transmission, phase response, mean photon number, power spectrum, and spectral function. We show that by the careful engineering of these hybrid light-matter systems, one can achieve a significant amplification of the optical signal with the voltage-biased electronic system serving as a gain medium. We also study the steady state current across the device, identifying elastic and inelastic tunnelling processes which involve the cavity mode. Our results show how recent advances in quantum electronics can be exploited to build hybrid light-matter systems that behave as single-atom amplifiers and photon source devices. The diagrammatic Keldysh approach is primarily discussed for a cavity-coupled double quantum dot architecture, but it is generalizable to other hybrid light-matter systems.
description: 30 pages, 13 figures
Spatial proteomics couple to Mass Spectrometry (BioID-MS)
Creators: name: Ingles-Prieto, Alvaro
name: Liñeiro, Eva
name: Frommelt, Fabian
Publisher: name: Zenodo
Year: 2022
Subjects: Protocol

description: BioID (proximity-dependent Biotin Identification) is a method for labeling proteins with biotin in a proximity-dependent manner. Biotinylated proteins can be selectively isolated by affinity purification and identified by nLC-MS/MS. The final output is a proximity proteomic data set.
Decoupling Performance Gains of Silicon Hetero-Junction Bifacial Modules
Creators: name: Quest, H.
name: Virtuani, A.
name: Gnocchi, L.
name: Borja Block, A.
name: Wyrsch, N.
name: Ballif, C.
Publisher: name: WIP
Year: 2022
Subjects: Photovoltaic Modules and BoS Components
PV Module Performance – Modelling, Testing, Standards

description: 8th World Conference on Photovoltaic Energy Conversion; 636-641
description: Silicon heterojunction (SHJ) solar cells and bifacial modules are expected to rapidly grow in the PV market, with their high power conversion efficiency, good performance at low irradiation and better temperature coefficients (TCs) allowing for improved energy yields. It is therefore increasingly relevant to have comparative analyses with conventional monofacial modules and market leading PERC cells. The aim of this contribution is to assess the performance of five PV modules on a rooftop monitoring station in Neuchâtel: two bifacial SHJ, two monofacial SHJ and one benchmark monofacial PERC. These three module types allow for detailed comparisons of performance enhancing factors both on the module structure and solar cell technology levels, allowing to decouple individual performance effects. After almost two years of monitoring, results show that bifacial modules yield 7.2% energy gains over both monofacial technologies, and 5% improved performance ratio (PR). For the corrected PR, current bifacial corrections may not fully describe the angular, optical and seasonal effects, as a 2.2% bifacial gain is still observed after temperature and rear irradiance corrections, leaving room for improvement in the current bifacial PR definition. In terms of temperature dependence, field-based TCs are found to be better for SHJ cells than PERC (-0.16%/°C vs. -0.31%/°C at STC, respectively), although performance gains also vary with irradiance conditions.
Estimating Solar Cell Operating Temperature via Deep Neural Networks
Creators: name: Katsaounis, Th.
name: Papadomichelakis, G.
name: Kotsovos, K.
name: Gereige, I.
name: Abdullah, M.
name: Jamal, A.
name: Tzavaras, A.
Publisher: name: WIP
Year: 2022
Subjects: Photovoltaic Modules and BoS Components
PV Module Performance – Modelling, Testing, Standards

description: 8th World Conference on Photovoltaic Energy Conversion; 629-631
description: Saudi Arabia has great potential in clean energy production from photovoltaic installations. There are two main obstacles towards this goal which are related to the local climate: sandstorms and high ambient temperatures. Sandstorms are quite frequent in the region; scattered particles reduce solar irradiance and soil deposition on solar panels surface is significant, requiring regular cleaning. Furthermore, for most part of the year daily ambient temperatures can reach as high as 45 – 55 °C which are well above the range of STC for solar panels. These two factors can reduce the energy yield output of PV installations significantly. A priori knowledge and quantification of this efficiency loss can help design and assist in strategic planning to compensate and reduce the effects of local climate characteristics in energy yield output. In this work we aim on the estimation of the operating temperature of solar cells which is one of the key parameters for the assessment of the actual performance of photovoltaic panels. The proposed methodology is based on machine learning techniques and on Deep Neural Networks. The models provide excellent results and approximate solar cell operating temperature with less that 1 °C of accuracy.
Development of a New Characterization Method of Soiling on PV Module Based on Optical Microscopy
Creators: name: Arbaretaz, S.
name: Ménézo, C.
name: Planès, E.
name: Pilat, E.
Publisher: name: WIP
Year: 2022
Subjects: Photovoltaic Modules and BoS Components
PV Module Performance – Modelling, Testing, Standards

description: 8th World Conference on Photovoltaic Energy Conversion; 632-635
description: Herein, a new characterization method is developed based on optical microscopy. Images are acquired with transmitted light microscope at two magnifications and using image combination on vertical axis. The image analyzing is done with ImageJ software, using gray scale threshold function. Size of particles is analyzed with the equivalent diameter taken as size parameter. The particle morphology is also analyzed. Similar methods in literature use the shape factor to describe morphology of particles. However, the shape factor shows deviation due to the perimeter estimation of pixelated forms. Therefore, new morphological factors are defined without using the perimeter. Cementation process is reproduced in an indoor soiling test-bed with dust from the Atacama Desert. This process is study with this new characterization method. Particle and agglomerate size are smaller after cementation than just after dust deposition. Also, particle shape seems rounder after cementation. However, it requires further study about shape analysis before conclusions can be drawn.
Analysis of Encapsulant Discoloration Effect on the Temperature of Photovoltaic Module
Creators: name: Pareek, A.
name: Meena, R.
name: Gupta, R.
Publisher: name: WIP
Year: 2022
Subjects: Photovoltaic Modules and BoS Components
PV Module Performance – Modelling, Testing, Standards

description: 8th World Conference on Photovoltaic Energy Conversion; 619-622
description: Encapsulant discoloration is a major reliability issue in a photovoltaic (PV) module that significantly affects its power generation. In addition, the discoloration can also affect the temperature of a PV module. High temperature negatively affects the reliability and power output of PV module. In this work, the effect of encapsulant discoloration on the temperature of PV modules has been quantitatively analyzed using simulation performed through electro-thermal modelling. The loss in power output obtained by the electrical model has been used to calculate the heat source for the thermal model to estimate the temperature. Temperature has been estimated for two case of uniform and non-uniform discoloration. The results show that uniform discoloration can increases the temperature by a few degrees compared with a pristine module. While non-uniform discoloration can cause a rise in temperature of upto 37 °C.
Mitochondrial enrichment followed by Affinity Purification couple to Mass Spectrometry (AP-MS)
Creators: name: Liñeiro, Eva
name: Ingles-Prieto, Alvaro
name: Frommelt, Fabian
name: Mueller, André C.
Publisher: name: Zenodo
Year: 2022
Subjects: Protocol

description: Due to their dual membrane composition and high hydrophobicity, mitochondrial SLCs are not ideal candidates for the mild lysis condition we standardly used in RESOLUTE WP2 AP-MS. We, therefore, use an adapted protocol (modified from Frezza et al.) for the study and definition of protein-protein interaction network of mitochondrial SLCs.
Optimal Methodology for Forecasting Performance Loss Rate of Fielded Photovoltaic Systems Using Robust Principal Component Analysis and Auto Regressive Integrated Moving Average
Creators: name: Michail, A.
name: Livera, A.
name: Kyprianou, A.
name: Georghiou, G.E.
Publisher: name: WIP
Year: 2022
Subjects: Photovoltaic Modules and BoS Components
PV Module Performance – Modelling, Testing, Standards

description: 8th World Conference on Photovoltaic Energy Conversion; 623-628
description: In this paper, an optimal methodology for forecasting the performance loss rate (PLR) of photovoltaic (PV) systems is presented using robust principal component analysis (RPCA) and seasonal auto regressive integrated moving average (SARIMA) methods. The SARIMA models were identified based on four different criterions (i.e., information and empirical criterions) using three different cases for the values of the seasonal and non-seasonal differencing orders of the models. The SARIMA models were used to forecast the performance ratio (PR) time series of fielded PV systems. Then, the RPCA method was used to estimate the PLR based on the forecasted PR values. The results demonstrated that the forecasted PLR values using the different cases and criteria were in good agreement with the PLR values extracted from actual field data, exhibiting absolute error (AE) below 1.03%/year. Therefore, the RPCA method can be used to estimate the PLR, even when using forecasted PR values. Moreover, for almost all PV systems, the models with the lower p-values yielded lower values for the RMSE between the actual and forecasted PR time series. The optimal methodology was finally chosen based on a comparative analysis focusing on the forecasting occuracy of both PR and PLR, statistical significance, and method’s simplicity.
Gröbner bases and cocyclic Hadamard matrices
Creators: name: Álvarez, V.
name: Armario, J. A.
name: Falcón, R. M.
name: Frau, M. D.
name: Gudiel, F.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05B20, 13P10

description: Hadamard ideals were introduced in 2006 as a set of nonlinear polynomial equations whose zeros are uniquely related to Hadamard matrices with one or two circulant cores of a given order. Based on this idea, the cocyclic Hadamard test enable us to describe a polynomial ideal that characterizes the set of cocyclic Hadamard matrices over a fixed finite group $G$ of order $4t$. Nevertheless, the complexity of the computation of the reduced Gröbner basis of this ideal is $2^{O(t^2)}$, which is excessive even for very small orders. In order to improve the efficiency of this polynomial method, we take advantage of some recent results on the inner structure of a cocyclic matrix to describe an alternative polynomial ideal that also characterizes the mentioned set of cocyclic Hadamard matrices over $G$. The complexity of the computation decreases in this way to $2^{O(n)}$, where $n$ is the number of $G$-coboundaries. Particularly, we design two specific procedures for looking for $\mathbb{Z}_t \times \mathbb{Z}_2^2$-cocyclic Hadamard matrices and $D_{4t}$-cocyclic Hadamard matrices, so that larger cocyclic Hadamard matrices (up to $t \leq 31$) are explicitly obtained.
description: 14 pages, 3 tables
The Role of Supplier Relationship Management in Perceived Organizational Performance; the Case of Ambo Mineral Water SC (AMWSC)
Creators: name: Mekuria, Eleni
Publisher: name: National Academic Digital Repository of Ethiopia
Year: 2016

description: he major objective of this study was to explore the role of supplier relationship management in perceived organizational performance of Ambo Mineral Water S.co (AMWSC). This research was designed as a descriptive, cross-sectional design. Supplier segmentation has a positive and strong relationship with Organizational Performance as its r=0.898 with Sig. (2-tailed) of 0.000. Suppliers relationship management governance has a very strong and positive relationship with organizational performance (r=-0.096) with Sig. (2-tailed) of 0.000. Supplier performance management, it has weak and negative relationship with organizational performance r=-0.96 with Sig. (2-tailed) of 0.554 (insignificant which is greater than 0.005) and Supplier development and organizational performance has a very strong and positive relationship r=0.898 with Sig. (2- tailed) of 0.000 The effect of supplier segmentation, SRM governess, supplier performance and supplier development on organization performance with AWMSC organization were 0.040, 0.000, 0.888 and 0.014 respectively. Therefore, AWMSC requires working hard to improve the supplier performance management to increase organization performance level. Key Words: Supplier Relation Management, Organizational performance, Suppliers
Worldwide Moisture Ingress Evaluation in Photovoltaic Modules Using Finite Element Simulations and Machine Learning
Creators: name: Mitterhofer, S.
name: Ascencio-Vásquez, J.
name: Gu, X.
Publisher: name: WIP
Year: 2022
Subjects: Photovoltaic Modules and BoS Components
Materials for PV Modules, Durability, Reliability and Accelerated Testing Methods

description: 8th World Conference on Photovoltaic Energy Conversion; 609-613
description: Ambient water can be absorbed by photovoltaic (PV) modules, affecting their degradation. This paper presents a two-step approach to evaluate the moisture profile inside fielded PV modules around the world. The first step consists of moisture ingress simulations at more than 17000 global locations using a cluster, running up to 160 simulations in parallel. Results of the simulations show a low R2-value of 0.65 when correlating the ambient relative humidity and the saturation moisture concentration in front of the cell, emphasizing the need for such simulations to provide more accurate inputs for degradation modelling. In the second step, we train a machine learning algorithm to obtain a model finding a better correlation between the important climatic parameters and the simulation results. The ML algorithm can accurately find such a correlation, shown by the R2-value of 0.98. We use the algorithm to further predict water ingress and interpolate the results to other global locations in a higher spatial resolution of the climatic input parameters.
title: (Un)Veiling Sexual Identities. Plays, Characters and Language in 21st Century British Drama
Creators: name: Passa, Davide
Publisher: name: Sapienza University of Rome
publisherIdentifier: https://ror.org/02be6w209
publisherIdentifierScheme: ROR
Year: 2024

description: This study, situated within the field of Language and Sexuality Studies, investigates the characterisation of fictional gay men in 21st-century British drama. The research is based on a corpus of 61 plays, staged between 2000 and 2020, which collectively feature 187 gay male characters. The study employs methodological triangulation to explore the corpus from three distinct perspectives, moving from broad trends to more detailed analyses.
The first section offers an overview of 20th and 21st-century British drama featuring gay characters, identifying general trends in the portrayal of homosexuality in contemporary British theatre. The second section delves into the 187 fictional gay characters, classifying them according to both sociolinguistic variables (such as age, social class, and linguistic variety) and variables specific to Language and Sexuality Studies (including levels of openness about their sexuality and their distinctive use of “gayspeak”). The final section takes an eclectic approach, providing a multifaceted analysis of the “gayspeak” observed in the corpus. This is done through both manual analysis and a corpus-assisted approach using #Lancsbox software. The primary goal of this section is to evaluate whether the features of “gayspeak” identified in earlier studies persist in the contemporary plays under examination.
Quantifying the Energy Impact of Soiling Thanks to the Tool SoilRatio
Creators: name: Arbaretaz, S.
name: Pilat, E.
name: Colin, H.
name: Urrejola, E.
Publisher: name: WIP
Year: 2022
Subjects: Photovoltaic Modules and BoS Components
Balance of System Components

description: 8th World Conference on Photovoltaic Energy Conversion; 614-618
description: Herein, a soiling measurement tool, termed “SoilRatio,” and its software is presented. The originality of this fully integrated device lies on its standalone feature and its sensors on a module scale. It is able to quantify precisely, quickly, and regardless the type of soiling, the production loss of a photovoltaic plant. Most soiling measuring devices consist of two similar modules mounted side by side, one is cleaned frequently and the other is left soiled. Other systems use a photodiode optical sensor that has to be calibrated according to the type of soiling targeted or a cell protected and another exposed as sensors. The sensor surface is too small to generate results representative of commercial modules and should therefore, be processed and interpreted. The concept chosen by the CEA is to use a pair of modules and cover one of them to keep it clean. In this way, it does not require any cleaning, which ensures better accuracy and lowers operating costs. Various experiments are performed to assess its performance and improve the SoilRatio device. The specifications document of the next version is already written to integrate modules with multiple measurement areas so as to identify the soiling patterns.
Interactive Mitigation of Biases in Machine Learning Models
Creators: name: Busum, Kelly M Van
Publisher: name: Purdue University Graduate School
Year: 2024
Subjects: classificationCode: 461106
subject: Semi- and unsupervised learning
classificationCode: 460105
subject: Applications in social sciences and education

description: Bias and fairness issues in artificial intelligence algorithms are major concerns as people do not want to use AI software they cannot trust. This work uses college admissions data as a case study to develop methodology to define and detect bias, and then introduces a new method for interactive bias mitigation.Admissions data spanning six years was used to create machine learning-based predictive models to determine whether a given student would be directly admitted into the School of Science under various scenarios at a large urban research university. During this time, submission of standardized test scores as part of a student’s application became optional which led to interesting questions about the impact of standardized test scores on admission decisions. We developed and analyzed predictive models to understand which variables are important in admissions decisions, and how the decision to exclude test scores affects the demographics of the students who are admitted.Then, using a variety of bias and fairness metrics, we analyzed these predictive models to detect biases the models may carry with respect to three variables chosen to represent sensitive populations: gender, race, and whether a student was the first in his/her family to attend college. We found that high accuracy rates can mask underlying algorithmic bias towards these sensitive groups.Finally, we describe our method for bias mitigation which uses a combination of machine learning and user interaction. Because bias is intrinsically a subjective and context-dependent matter, it requires human input and feedback. Our approach allows the user to iteratively and incrementally adjust bias and fairness metrics to change the training dataset for an AI model to make the model more fair. This interactive bias mitigation approach was then used to successfully decrease the biases in three AI models in the context of undergraduate student admissions.
Radio detections of southern ultracool dwarfs
Creators: name: Lynch, C.
name: Murphy, T.
name: Ravi, V.
name: Hobbs, G.
name: Lo, K.
name: Ward, C.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We report the results of a volume-limited survey using the Australia Telescope Compact Array to search for transient and quiescent radio emission from 15 southern hemisphere ultracool dwarfs. We detect radio emission from 2MASSW J0004348-404405 increasing the number of radio loud ultracool dwarfs to 22. We also observe radio emission from 2MASS J10481463-3956062 and 2MASSI J0339352-352544, two sources with previous radio detections. The radio emission from the three detected sources shows no variability or flare emission. Modelling this quiescent emission we find that it is consistent with optically thin gyrosynchrotron emission from a magnetosphere with an emitting region radius of (1 - 2)$R_*$, magnetic field inclination 20$^{\circ}$ - 80$^{\circ}$, field strength $\sim$10 - 200 G, and power-law electron density $\sim$10$^4$ - 10$^8$ cm$^{-3}$. Additionally, we place upper limits on four ultracool dwarfs with no previous radio observations. This increases the number of ultracool dwarfs studied at radio frequencies to 222. Analysing general trends of the radio emission for this sample of 15 sources, we find that the radio activity increases for later spectral types and more rapidly rotating objects. Furthermore, comparing the ratio of the radio to X-ray luminosities for these sources, we find 2MASS J10481463-3956062 and 2MASSI J0339352-352544 violate the Guedel-Benz relation by more than two orders of magnitude.
description: 10 pages, 7 figures
A Study of Module Degradation From a 10-Year Installation in the Urban Tropical Environment
Creators: name: Pravettoni, M.
name: Mahesh S/O Sundar Das, M.
name: Singh Rajput, A.
name: Li, W.
name: Valliappan, S.
Publisher: name: WIP
Year: 2022
Subjects: Photovoltaic Modules and BoS Components
Materials for PV Modules, Durability, Reliability and Accelerated Testing Methods

description: 8th World Conference on Photovoltaic Energy Conversion; 594-598
description: The solar photovoltaic installation capacity in Southeast Asia is growing widely in the region at the fastest pace among other renewables. Today’s market requires performance warranties that are decades long, and although much effort is put nowadays into module qualification and study of new and ever more aggressive degradation mechanisms, fewer studies are available from the field experience in the tropical climate compared to the continental one. This work aims to present one of the first comprehensive reliability studies of a statistically relevant sampling of PV modules after 10 years of installation in the Tropical region. Degradation modes are listed and analysed, and their occurrence is correlated to power degradation. A total of 72 modules were sampled from the original plant of 750 modules in one of Singapore’s central districts. Soiling was observed to be one of the sources of power degradation: even self-cleaning from the frequent tropical rains is ineffective and cementation takes place. All modules have been analysed and various degradation modes are observed. Their correlation with the observed deviations from the nameplate of the electrical parameters is presented.
A fast immersed boundary method for external incompressible viscous flows using lattice Green's functions
Creators: name: Liska, Sebastian
name: Colonius, Tim
Publisher: name: arXiv
Year: 2016
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: A new parallel, computationally efficient immersed boundary method for solving three-dimensional, viscous, incompressible flows on unbounded domains is presented. Immersed surfaces with prescribed motions are generated using the interpolation and regularization operators obtained from the discrete delta function approach of the original (Peskin's) immersed boundary method. Unlike Peskin's method, boundary forces are regarded as Lagrange multipliers that are used to satisfy the no-slip condition. The incompressible Navier-Stokes equations are discretized on an unbounded staggered Cartesian grid and are solved in a finite number of operations using lattice Green's function techniques. These techniques are used to automatically enforce the natural free-space boundary conditions and to implement a novel block-wise adaptive grid that significantly reduces the run-time cost of solutions by limiting operations to grid cells in the immediate vicinity and near-wake region of the immersed surface. These techniques also enable the construction of practical discrete viscous integrating factors that are used in combination with specialized half-explicit Runge-Kutta schemes to accurately and efficiently solve the differential algebraic equations describing the discrete momentum equation, incompressibility constraint, and no-slip constraint. Linear systems of equations resulting from the time integration scheme are efficiently solved using an approximation-free nested projection technique. The algebraic properties of the discrete operators are used to reduce projection steps to simple discrete elliptic problems, e.g. discrete Poisson problems, that are compatible with recent parallel fast multipole methods for difference equations. Numerical experiments on low-aspect-ratio flat plates and spheres at Reynolds numbers up to 3,700 are used to verify the accuracy and physical fidelity of the formulation.
description: 32 pages, 9 figures; preprint submitted to Journal of Computational Physics
Investigating Long-Term UV Durability of Glass/Transparent Backsheet Laminates for Bifacial Photovoltaics - Cross-sectional Analysis of Backsheet Degradation
Creators: name: Gu, X.
name: Smith, S.
name: Mitterhofer, S.
name: Moffitt, S.
name: Jhang, S.
name: Watson, S.
name: Sung, L.P.
Publisher: name: WIP
Year: 2022
Subjects: Photovoltaic Modules and BoS Components
Materials for PV Modules, Durability, Reliability and Accelerated Testing Methods

description: 8th World Conference on Photovoltaic Energy Conversion; 599-604
description: Bifacial modules with glass/transparent backsheet (G/CB) structures offer lighter weight and higher hail resistance over traditional glass/glass (G/G) modules. However, research on long-term durability of transparent backsheets and their usage in bifacial modules is lacking. In this study, the G/CB laminated coupons were constructed with polyolefin elastomer encapsulant (POE) and three types of fluoropolymer-based transparent backsheets. The coupons were aged using an integrating sphere-based weathering device at 65 C and 50 % relative humidity (RH) for 3600 h, with an approximately 1800 MJ/m2 UV dose (295 nm to 400 nm), followed by 200 cycles of thermal cycling from 85 C to -40 C. Cross-sectional characterizations of optical, chemical, and mechanical degradation were conducted on the transparent backsheets of the exposed coupons using confocal fluorescence microscopy, microscale infrared spectroscopy, and nanoindentation, respectively. All three types of backsheets show one or more degradation modes including yellowing, surface/bulk cracking, or delamination. The greatest yellowing and cracking are seen on a fluoroethylene vinyl ether (FEVE)/polyethylene terephthalate (PET)/ethylene-vinyl acetate (EVA)-based transparent backsheet. The results also show changes in fluorescence intensity are consistent with chemical and mechanical changes across the thickness of the PET core layer in the FEVE/PET/EVA backsheet.
Influence of Production Processes on PID-s Sensitivity of c-Si Modules and Novel Mitigation Strategies
Creators: name: Stauffenberg, A.
name: Jäckel, B.
name: Pander, M.
name: Fröbel, J.
name: Erban, C.
Publisher: name: WIP
Year: 2022
Subjects: Photovoltaic Modules and BoS Components
Materials for PV Modules, Durability, Reliability and Accelerated Testing Methods

description: 8th World Conference on Photovoltaic Energy Conversion; 605-608
description: Potential-induced degradation (PID) is one of the major degradation mechanisms of PV modules, reducing their power and useful time of operation. Novel mitigation strategies for the shunting type, PID-s, on module level are investigated by varying production parameters and materials in modules. This includes variations of encapsulant material (silicone and EVA), silicone mixing ratio and degree of EVA cross-linking as well as different front and back cover constructions using glass and transparent polymers. Modules are stressed under IEC standard conditions for PID-s and characterized using I-V-characteristics and electroluminescence imaging. Modules with silicone encapsulant are resistant to degradation after 300+ hours of PID-s stress exposure, but are not with damp heat preconditioning. A higher mixing ratio between silicone and hardener might benefit PID-s resistance. Degradation of modules with EVA encapsulant varies strongly with parameters: A PID insensitive EVA with high degree of cross-linking reduces PID-s sensitivity, but ultimately can’t stop degradation. Recovery from PID-s by inverting the potential is possible but limited, depending on the degree of degradation. Modules with a polymer sheet in front instead of glass show significantly reduced PID-s susceptibility, leading to a new mitigation strategy.
Are PV-Module Backsheets with an Outer Fluoropolymer Layer the Better Solution?
Creators: name: Kriening, J.
name: Engel, M.
name: Geyer, D.
name: Stellbogen, D.
name: Lechner, P.
Publisher: name: WIP
Year: 2022
Subjects: Photovoltaic Modules and BoS Components
Materials for PV Modules, Durability, Reliability and Accelerated Testing Methods

description: 8th World Conference on Photovoltaic Energy Conversion; 580-584
description: The aim of this work is to determine if polyethylene terephthalate (PET)-core backsheet laminates with an outer weather protection layer based on fluoropolymers are advantageous or necessary to guaranty adequate longterm stability and electrical safety of PV-modules. After observing a manifold of severe issues with coextruded polyamide backsheets (trade name AAA) [1, 2, 3] fluoropolymer protected backsheets gain back significant popularity. However, it is increasingly under discussion, whether fluoropolymers are really of low concern for human and environmental health [4]. More specifically, concerns are expressed regarding the safe disposal of fluorochemical polymers at the end of their life cycle and the rather limited options for recycling. Our approach was comparative testing of field aged modules with and without fluorochemical outer layer backsheets. In the test laboratory Solab of ZSW Stuttgart the modules were visually inspected, the STC power and electrical insulation was measured and the embrittlement of the backsheet was evaluated. While we observed some differences concerning the visual anomalies, the STC power and the electrical insulation of the modules as well as the embrittlement of the related backsheets indicate that fluorine-free outer layer polymers protect the PET core of the backsheet just as well as fluorochemical polymers.