cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Emerging Performance Issues of Photovoltaic Battery Systems
Creators: name: Weniger, J.
name: Tjaden, T.
name: Bergner, J.
name: Quaschning, V.
Publisher: name: WIP
Year: 2016
Subjects: PV Applications and Integration
Grid and Energy System Integration

description: 32nd European Photovoltaic Solar Energy Conference and Exhibition; 2377-2385
description: This paper sheds new light on the real energetic performance of grid-connected PV-battery systems for self-supply purposes in residential buildings. A novel simulation test for the performance assessment of residential PV-battery systems with the Storage Performance Index (SPI) is proposed. Two different systems are modelled and annual time series simulations are carried out with a temporal resolution of one second. The calculated Storage Performance Index of the AC- and DC-coupled PV-battery system under study amounts to 51% and 53%, respectively. In other words, the investigated PV-battery systems can realize about the half of the respective grid electricity cost saving potential of equivalent lossless PV-battery systems. Moreover, a detailed loss analysis reveals that the majority of the system losses are caused by the conversion losses in the power electronic components, followed by the losses due to the standby power consumption of the battery, converter and auxiliaries. The developed simulation test allows the evaluation of the energetic and economic performance of PV-battery systems of different sizes and system topologies. In this way, the comparability and transparency with regard to the performance of different products available on the market can be improved.
Detailed Irradiance Statistics for the Design of PV-Systems from a Set of Ground Stations in Central Africa (Rwanda)
Creators: name: Beyer, H.G.
name: Habyarimana, F.
Publisher: name: WIP
Year: 2016
Subjects: Operation, Performance, Reliability and Sustainability of Photovoltaics
Solar Resource and Forecasting

description: 32nd European Photovoltaic Solar Energy Conference and Exhibition; 2343-2345
description: In Rwanda the capital region around Kigali city and the districts as Gasabo, Nyarugenge and Kacyiru show a good coverage by the nationwide grid whereas, in contrast more rural districts show much lower rates. For both, an increased share of PV to bulk electricity and off-grid rural electrification projects are initialized, and are in need of information on the irradiance characteristics in the country. Using data from a dedicated network of meteorological stations, that are logging the irradiance with a 15min time resolution, statistics of solar irradiance relevant for the design of both types of PV-systems are extracted and compared to the respective information for sites in Europe.
Alteration in gene expression during expansion-induced fetal lung growth
Creators: name: Halil, Gurhan.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Algorithm for Technical and Economic Design Optimization of Photovoltaic Systems
Creators: name: Birtel, J.
name: Te Heesen, H.
Publisher: name: WIP
Year: 2016
Subjects: Operation, Performance, Reliability and Sustainability of Photovoltaics
Solar Resource and Forecasting

description: 32nd European Photovoltaic Solar Energy Conference and Exhibition; 2356-2359
description: Customers are interested in a technical and economic optimized investment to a photovoltaic system.
Often, the focus of project developer is to plan and construct a PV system and maximize the own consumption rate.
The economic optimization is disregarded although this is the more important factor. Here we show an algorithm, that
is able to optimize a PV system made of two subsystems with different module orientation and inclination. The
algorithm takes the load profile, the costs and prices, and the PV yield into account to vary the subsystem capacities
and to calculate the annual energy costs. The system setup is automatically optimized by minimization of the energy
costs. Thus, the algorithm is able to support customers to identify the best PV system setup for their individual energy
consumption and costs.
Reply to "Comment on `Breakdown of the expansion of finite-size corrections to the hydrogen Lamb shift in moments of charge distribution'"
Creators: name: Hagelstein, Franziska
name: Pascalutsa, Vladimir
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: To comply with the critique of the Comment [J. Arrington, arXiv:1602.01461], we consider another modification of the proton electric form factor, which resolves the "proton-radius puzzle". The proposed modification satisfies all the consistency criteria put forward in the Comment, and yet has a similar impact on the puzzle as that of the original paper. Contrary to the concluding statement of the Comment, it is not difficult to find an ad hoc modification of the form factor at low $Q$ that resolves the discrepancy and is consistent with analyticity constraints. We emphasize once again that we do not consider such an ad hoc modification of the proton form factor to be a solution of the puzzle until a physical mechanism for it is found.
description: 3 pages, 3 figures, 1 table, to appear in Phys. Rev. A, corrected typo in caption of fig. 1
Stochastic Downscaling Algorithm to Generate High-Resolution Time-Series for Improved PV Yield Simulations
Creators: name: Duscha, C.A.
name: Buehler, S.A.
name: Lezaca, J.
name: Bohny, C.-M.
name: Meyer, R.
Publisher: name: WIP
Year: 2016
Subjects: Operation, Performance, Reliability and Sustainability of Photovoltaics
Solar Resource and Forecasting

description: 32nd European Photovoltaic Solar Energy Conference and Exhibition; 2346-2351
description: The output of PV plants varies strongly with variations of incoming solar radiation. As most weather data
sets for PV today still are only supplied in hourly time-resolution, and as most popular yield simulation tools are only
capable of handling hourly resolved input, the effect sub-hourly fluctuations on the yield of PV plants is largely
neglected. However, it is assumed that especially where clouds appear frequently such variations can play an important
role in estimating the yield of a PV plant. Methods to downscale coarse scale time-series data to higher resolutions have
been already developed. But they still have shortcomings, generating only time series with hourly or even daily resolution
and underestimating high radiation values actually observed. Depending on frequency of such ‘over-radiation’ situations
and plant layout, this effect can lead to lower yields. In contrast to other methods, the new algorithm developed here is
able to generate 1 minute resolution time series from incoherent hourly resolution time-series. Using the simulation tools
SAM and PVlib for PV plants we have compared the energy yield obtained with different time-resolutions. We see that
the energy yield calculation improves using the 1 min synthesized time-series compared to the 1 hour averaged.
The MZ relation for local star-forming galaxies
Creators: name: Wu, Yu-Zhong
name: Zhang, Shuang-Nan
name: Zhao, Yong-Heng
name: Zhang, Wei
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We investigate the evolution of the mass-metallicity (MZ) relation with a large sample of 53,444 star-forming galaxies (SFGs) at $0.0441.0$ and log$(L_{\rm O\ III})>39.7$, we find that metallicity evolution is shown well, and that SFR evolution still is shown well under the latter luminosity threshold, but the evolution is not observed under the former one; (4) the evolution of the MZ relation seems to disappear at about $\rm log(M_{*}/M_\odot)>10.0$ after applying the luminosity threshold of log$(L_{\rm H α})>41.0$ or log$(L_{\rm O\ III})>39.7$; (5) we find $α=0.09$ and $α=0.07$ in the equation ($μ={\rm log}M_{*}-α\rm log(SFR)$) for log$(L_{\rm H α})>41.0$ and log$(L_{\rm O\ III})>39.7$ samples, respectively, and these imply that the evolution of the MZ relation may have a weaker dependence on SFR in our sample.
description: 8 pages, 6 figures, 2 tables; Accepted for publication in MNRAS
Satellite Data Assimilation in Regional Numerical Weather Prediction as a Key for Better Cloud Cover Forecasts in Tropical Environments
Creators: name: Kurzrock, F.
name: Cros, S.
name: Chang-Ming, F.
name: Potthast, R.
name: Linguet, L.
name: Lajoie, G.
Publisher: name: WIP
Year: 2016
Subjects: Operation, Performance, Reliability and Sustainability of Photovoltaics
Solar Resource and Forecasting

description: 32nd European Photovoltaic Solar Energy Conference and Exhibition; 2318-2321
description: Although the high amount of solar irradiance in the tropics is an advantage for a profitable PV production, the local meteorological conditions induce a very high variability which is problematic for a safe and gainful injection into the power grid. This issue is even more critical in non-interconnected territories where network stability is an absolute necessity and the injection of PV power has to be limited.
The basis for precise cloud evolution and subsequent irradiance forecasts are high quality atmospheric analyses for NWP. Geostationary meteorological satellites provide valuable observations of cloud properties with high spatio-temporal resolutions and allow a pertinent data assimilation.
The shortcoming is that optical and thermal channels of satellite sensors do not provide cloud properties from inside clouds. Different existing data assimilation approaches aim at deriving atmospheric analyses with most realistic cloud features, utilising geostationary satellite observations. The potential of assimilating satellite-derived cloud information in regional NWP with focus on irradiance forecasts in tropical regions has not been evaluated so far. Hence, the present work aims at evaluating the potential of geostationary satellite data assimilation in limited-area models applied to the French tropical oversea territories Reunion Island and French Guiana.
Global Horizontal Irradiation in Castilla-León, Spain: Spatial Estimation Through Interpolation Methods
Creators: name: Rodríguez-Amigo, M.C.
name: Díez-Mediavilla, M.
name: Gonzalez-Peña, D.
name: Dieste-Velasco, M.
name: Alonso-Tristán, C.
Publisher: name: WIP
Year: 2016
Subjects: Operation, Performance, Reliability and Sustainability of Photovoltaics
Solar Resource and Forecasting

description: 32nd European Photovoltaic Solar Energy Conference and Exhibition; 2322-2326
description: Four spatial interpolation methods (Inverse Distance Weighting, Spline, Kriging and Natural Neighbor) and their different variations have been employed to map Solar Global Horizontal Irradiation (GHI) in Castilla- Leon, Spain. The interpolation network consists of 71 ground meteorological stations and seven complete years of half hourly data have been used to obtain annual daily averages of GHI. The interpolation results have been tested against data from the four Spanish National Meteorological Agency (AEMET) stations available in the region using standard statistical indicators (RMSE, MBE, MAPE and MAE). An additional partial cross validation of the results has been implemented excluding five stations from the interpolation network attending different criteria to test the results of the interpolation method.
Rees algebra of maximal order Pfaffians and its diagonal subalgebras
Creators: name: Kumar, Neeraj
name: Venugopal, Chitra
Publisher: name: arXiv
Year: 2023
Subjects: subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics
subject: 13C40, 13D02, 13H10

description: Given a skew-symmetric matrix $X$, the Pfaffian of $X$ is defined as the square root of the determinant of $X$. In this article, we give the explicit defining equations of the Rees algebra of a Pfaffian ideal $I$ generated by the maximal order Pfaffians of a generic skew-symmetric matrix. We further prove that all diagonal subalgebras of the corresponding Rees algebra of $I$ are Koszul. We also look at Rees algebras of Pfaffian ideals of linear type associated with certain sparse skew-symmetric matrices. In particular, we consider the tridiagonal matrices and identify the corresponding Pfaffian ideals to be of Gröbner linear type and as the vertex cover ideals of unmixed bipartite graphs. As an application of our results, we conclude that all their ordinary and symbolic powers have linear quotients.
description: To appear in Communications in Algebra
The Impact of Indoor and Outdoor Radiometer Calibration on Solar Measurements
Creators: name: Habte, A.
name: Sengupta, M.
name: Andreas, A.
name: Reda, I.
name: Robinson, J.
Publisher: name: WIP
Year: 2016
Subjects: Operation, Performance, Reliability and Sustainability of Photovoltaics
Solar Resource and Forecasting

description: 32nd European Photovoltaic Solar Energy Conference and Exhibition; 2307-2311
description: Accurate solar radiation data sets are critical to reducing the expenses associated with mitigating
performance risk for solar energy conversion systems, and they help utility planners and grid system operators
understand the impacts of solar resource variability. The accuracy of solar radiation measured by radiometers
depends on the instrument performance specification, installation method, calibration procedure, measurement
conditions, maintenance practices, location, and environmental conditions. This study addresses the effect of
calibration methodologies and the resulting calibration responsivities provided by radiometric calibration service
providers such as the National Renewable Energy Laboratory (NREL) and manufacturers of radiometers. Some of
these radiometers are calibrated indoors, and some are calibrated outdoors. To establish or understand the differences
in calibration methodology, we processed and analyzed field-measured data from these radiometers. This study
investigates calibration responsivities provided by NREL’s broadband outdoor radiometer calibration (BORCAL)
and a few prominent manufacturers. The BORCAL method provides outdoor calibration responsivity of
pyranometers and pyrheliometers at a 45° solar zenith angle and responsivity as a function of solar zenith angle
determined by clear-sky comparisons to reference irradiance. The BORCAL method also employs a thermal offset
correction to the calibration responsivity of single-black thermopile detectors used in pyranometers. Indoor
calibrations of radiometers by their manufacturers are performed using a stable artificial light source in a side-by-side
comparison of the test radiometer under calibration to a reference radiometer of the same type. In both methods, the
reference radiometer calibrations are traceable to the World Radiometric Reference. These different methods of
calibration demonstrated 1% to 2% differences in solar irradiance measurement. Analyzing these values will
ultimately assist in determining the uncertainties of the radiometer data and will assist in developing consensus on a
standard for calibration.
Global Vertical Irradiation in the Fourth Cardinal Orientations in Burgos, Spain
Creators: name: Díez-Mediavilla, M.
name: Rodríguez-Amigo, M.C.
name: Pérez-Burgos, A.
name: García-Calderón, T.
name: Alonso-Tristán, C.
Publisher: name: WIP
Year: 2016
Subjects: Operation, Performance, Reliability and Sustainability of Photovoltaics
Solar Resource and Forecasting

description: 32nd European Photovoltaic Solar Energy Conference and Exhibition; 2327-2330
description: Four empirical mathematical models have been used to characterise the global vertical solar irradiation in the city of
Burgos, Spain. The cardinal orientations (North, South, East and West) have been studied in order to determine the
solar energy available on vertical surfaces in any orientation. The four models chosen from the literature cover all sky
conditions: clear-sky (Circumsolar model), cloudly-sky (Isotropic model) and partially cover sky (Hay model and
Klucher model) [1]. The empirical mathematical models allow the calculation of global vertical irradiation from
experimental data of global, direct and diffuse irradiation. Results have been compared to the experimental data
measured at the experimental facility located in Burgos, Spain.
First-order photon condensation in magnetic cavities: A two-leg ladder model
Creators: name: Bacciconi, Zeno
name: Andolina, Gian Marcello
name: Chanda, Titas
name: Chiriacò, Giuliano
name: Schiró, Marco
name: Dalmonte, Marcello
Publisher: name: arXiv
Year: 2023
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider a model of free fermions in a ladder geometry coupled to a nonuniform cavity mode via Peierls substitution. Since the cavity mode generates a magnetic field, no-go theorems on spontaneous photon condensation do not apply, and we indeed observe a phase transition to a photon condensed phase characterized by finite circulating currents, alternatively referred to as the equilibrium superradiant phase. We consider both square and triangular ladder geometries, and characterize the transition by studying the energy structure of the system, light-matter entanglement, the properties of the photon mode, and chiral currents. The transition is of first order and corresponds to a sudden change in the fermionic band structure as well as the number of its Fermi points. Thanks to the quasi-one dimensional geometry we scrutinize the accuracy of (mean field) cavity-matter decoupling against large scale density-matrix renormalization group simulations. We find that light-matter entanglement is essential for capturing corrections to matter properties at finite sizes and for the description of the correct photon state. The latter remains Gaussian in the the thermodynamic limit both in the normal and photon condensed phases.
description: 28 pages, 9 figures. Submission to SciPost. Comments are welcome
Are fractured cliffs the source of cometary dust jets ? Insights from OSIRIS/Rosetta at 67P
Creators: name: Vincent, J. -B.
name: Oklay, N.
name: Pajola, M.
name: Höfner, S.
name: Sierks, H.
name: Hu, X.
name: Barbieri, C.
name: Lamy, P. L.
name: Rodrigo, R.
name: Koschny, D.
name: Rickman, H.
name: Keller, H. U.
name: A'Hearn, M. F.
name: Barucci, M. A.
name: Bertaux, J. -L.
name: Bertini, I.
name: Besse, S.
name: Bodewits, D.
name: Cremonese, G.
name: Da Deppo, V.
name: Davidsson, B.
name: Debei, S.
name: De Cecco, M.
name: El-Maarry, M. R.
name: Fornasier, S.
name: Fulle, M.
name: Groussin, O.
name: Gutiérrez, P. J.
name: Gutiérrez-Marquez, P.
name: Güttler, C.
name: Hofmann, M.
name: Hviid, S. F.
name: Ip, W. -H.
name: Jorda, L.
name: Knollenberg, J.
name: Kovacs, G.
name: Kramm, J. -R.
name: Kührt, E.
name: Küppers, M.
name: Lara, L. M.
name: Lazzarin, M.
name: Lin, Z. -Y.
name: Moreno, J. J. Lopez
name: Lowry, S.
name: Marzari, F.
name: Massironi, M.
name: Moreno, F.
name: Mottola, S.
name: Naletto, G.
name: Preusker, F.
name: Scholten, F.
name: Shi, X.
name: Thomas, N.
name: Toth, I.
name: Tubiana, C.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Dust jets, i.e. fuzzy collimated streams of cometary material arising from the nucleus, have been observed in-situ on all comets since the Giotto mission flew by comet 1P/Halley in 1986. Yet their formation mechanism remains unknown. Several solutions have been proposed, from localized physical mechanisms on the surface/sub-surface (see review in Belton (2010)) to purely dynamical processes involving the focusing of gas flows by the local topography (Crifo et al. 2002). While the latter seems to be responsible for the larger features, high resolution imagery has shown that broad streams are composed of many smaller features (a few meters wide) that connect directly to the nucleus surface. We monitored these jets at high resolution and over several months to understand what are the physical processes driving their formation, and how this affects the surface. Using many images of the same areas with different viewing angles, we performed a 3-dimensional reconstruction of collimated jets, and linked them precisely to their sources on the nucleus. Results.We show here observational evidence that the Northern hemisphere jets of comet 67P arise from areas with sharp topographic changes and describe the physical processes involved. We propose a model in which active cliffs are the main source of jet-like features, and therefore the regions eroding the fastest on comets. We suggest that this is a common mechanism taking place on all comets.
description: Accepted by Astronomy & Astrophysics on 4 December 2015
Validation of Satellite Based Solar Irradiance According to the Heliosat-4-Method for Germany
Creators: name: Ditz, K.
name: Ruf, H.
name: Funk, D.
name: Schroedter-Homscheidt, M.
name: Köhler, C.
name: Heilscher, G.
Publisher: name: WIP
Year: 2016
Subjects: Operation, Performance, Reliability and Sustainability of Photovoltaics
Solar Resource and Forecasting

description: 32nd European Photovoltaic Solar Energy Conference and Exhibition; 2312-2317
description: The continuing growing number of volatile feed-in systems, e.g. photovoltaic (PV) systems in the low
voltage grid, leads to essential changes of the grid planning and operation. For this reason the distribution grid operators
will need independent switching operation in the future [1]. Therefore, the DSO is interested in knowing the actual PV
feed-in power. The most detailed solution is to equip all PV systems with Smart Meters to measure the actual feed-in
power. However, this solution causes additional costs for installation, service and operation. Though it’s only possible to
react on the volatile Feed-in power of the PV systems which could lead to high costs for control power or for the
curtailment of PV systems [2]. The solar irradiance is the most important input parameter for the PV simulation. A
solution without ground-based measurements is the usage of calculated solar irradiance from satellite pictures. Therefore,
some providers, like Helioclim, CM SAF, OSI SAF or the new developed CAMS Radiation Service, based on the
Heliosat-4-method, are available [3]. This paper focus on the validation of the solar irradiance calculated with the
Heliosat-4-method provided by CAMS Radiation Service.
Evaluating one-loop string amplitudes
Creators: name: Eberhardt, Lorenz
name: Mizera, Sebastian
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We evaluate one-loop open-string amplitudes at finite $α'$ for the first time. Our method involves a deformation of the integration contour over the modular parameter $τ$ to a fractal contour introduced by Rademacher in the context of analytic number theory. This procedure leads to explicit and practical formulas for the one-loop four-point amplitudes in type-I superstring theory, amenable to numerical evaluation. We plot the amplitudes as a function of the Mandelstam invariants $s$ and $t$ and directly verify long-standing conjectures about their behaviour at high energies.
description: 101 pages, many figures
IVF and ICSI of oocytes from allografted and xenografted ovarian tissue of the mouse, rat and marmoset monkey
Creators: name: Waterhouse, Tracey Anne.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
How to Reduce I-V Measurement Deviation between Research and Production
Creators: name: Takeda, Y.
name: Kojima, H.
name: Iwamoto, K.
name: Fujita, Y.
name: Morishima, T.
name: Shibamoto, K.
name: Abe, J.
Publisher: name: WIP
Year: 2016
Subjects: Operation, Performance, Reliability and Sustainability of Photovoltaics
PV Cells and Modules

description: 32nd European Photovoltaic Solar Energy Conference and Exhibition; 2299-2303
description: I-V measurement is very important for solar cell research well as for production. The probing method
is often different between them, and that may create measurement errors. We have found that FF is normally
measured lower in production line than in research environment, and the deviation gets bigger as the current grows
and as the bus bar gets narrower. That means we need to know how the deviation is caused by the probing differences,
particularly for high-efficiency cells.
We have tried various probing patterns and analyzed the cause of the measurement errors. Using the results, we will
propose better probing method in order to reduce the deviation between research and production environments. In
addition to the information we already published in our previous paper, this paper has added more test results and
new insight.
A Taxonomy for Tools, Processes and Languages in Automotive Software Engineering
Creators: name: Bock, Florian
name: Homm, Daniel
name: Siegl, Sebastian
name: German, Reinhard
Publisher: name: arXiv
Year: 2016
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Within the growing domain of software engineering in the automotive sector, the number of used tools, processes, methods and languages has increased distinctly in the past years. To be able to choose proper methods for particular development use cases, factors like the intended use, key-features and possible limitations have to be evaluated. This requires a taxonomy that aids the decision making. An analysis of the main existing taxonomies revealed two major deficiencies: the lack of the automotive focus and the limitation to particular engineering method types. To face this, a graphical taxonomy is proposed based on two well-established engineering approaches and enriched with additional classification information. It provides a self-evident and -explanatory overview and comparison technique for engineering methods in the automotive domain. The taxonomy is applied to common automotive engineering methods. The resulting diagram classifies each method and enables the reader to select appropriate solutions for given project requirements.
description: 16 pages, 11 figures, conference paper
Evaluating a Model to Estimate GHI, DNI and DHI from POA Irradiance
Creators: name: Gostein, M.
name: Stueve, W.
name: Passow, K.
name: Marion, B.
Publisher: name: WIP
Year: 2016
Subjects: Operation, Performance, Reliability and Sustainability of Photovoltaics
Solar Resource and Forecasting

description: 32nd European Photovoltaic Solar Energy Conference and Exhibition; 2338-2342
description: We evaluate the GTI-DIRINT model for estimating direct normal irradiance (DNI), diffuse horizontal irradiance (DHI), and global horizontal irradiance (GHI) from measured plane-of-array (POA) irradiance. Our motivation is to explore the potential for limiting ground-based irradiance measurements to POA to reduce instrumentation costs. We test the GTI-DIRINT model using meteorological data collected at seven First Solar PV power plants, comparing the GTI-DIRINT model, which uses POA as input, to the DIRINT model, which uses GHI as input. Furthermore, we include translation between reference module and thermopile pyranometer measurements to demonstrate the ability to use PV module POA performance data as a model input. The results indicate that the GTI-DIRINT model performs at least equivalently to the DIRINT model for fixed-tilt arrays and may have superior performance for large tilt angles encountered in single-axis tracking arrays.
The Elon Musk Paradox: Quantifying the Presence and Impact of Twitter Bots on Altmetrics with Focus in Social Sciences
Creators: name: Arroyo-Machado, Wenceslao
name: Herrera-Viedma, Enrique
name: Torres-Salinas, Daniel
Publisher: name: Zenodo
Year: 2023
Subjects: Twitter
X
bots
Social Sciences
Altmetrics

description: With the rise of Twitter bots in social and political spheres, their implications in scientific communication and altmetrics have become a concern. However, there are no large-scale studies that identify the population of bots and their impact on altmetrics. This quantitative study aims to analyse the presence and impact of Twitter bots in the dissemination of Social Science papers on Twitter and to explore the specific case of Information Science & Library Science (ISLS) as a case study. The overall presence of bots discussing Social Science papers has been found to account for 3.61% of users and 3.85% of tweets. However, this presence and impact is uneven across disciplines, highlighting Criminology & Penology with 12.4% of the mentions made by bots. In the specific case of ISLS, it has been determined by Kendall's correlation that mentions of bots have no impact on altmetrics.
description: Full paper available at: https://dapp.orvium.io/deposits/644235015db3c5af25159230/view
Understanding Customers' Evaluations Through Mining Airline Reviews
Creators: name: Yakut, Ibrahim
name: Turkoglu, Tugba
name: Yakut, Fikriye
Publisher: name: arXiv
Year: 2015
Subjects: subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences

description: Data mining can be evaluated as a strategic tool to determine the customer profiles in order to learn customer expectations and requirements. Airline customers have different characteristics and if passenger reviews about their trip experiences are correctly analyzed, companies can increase customer satisfaction by improving provided services. In this study, we investigate customer review data for in-flight services of airline companies and draw customer models with respect to such data. In this sense, we apply two approaches as feature-based and clustering-based modelling. In feature-based modelling, customers are grouped into categories based on features such as cabin flown types, experienced airline companies. In clustering-based modelling, customers are first clustered via k-means clustering and then modeled. We apply multivariate regression analysis to model customer groups in both cases. During this, we try to understand how customers evaluate the given services and what dominant characteristics of in-flight services can be from the customer viewpoint.
description: International Journal of Data Mining & Knowledge Management Process (IJDKP) Vol.5, No.6, November 2015
Defect Identification and Correlation with Electrical Degradation of Field Aged Thin Film Photovoltaic Technologies in Composite Climate
Creators: name: Rawat, R.
name: Kaushik, S.C.
name: Sastry, O.S.
name: Singh, Y.K.
name: Bora, B.
name: Singh, R.
Publisher: name: WIP
Year: 2016
Subjects: Operation, Performance, Reliability and Sustainability of Photovoltaics
PV Cells and Modules

description: 32nd European Photovoltaic Solar Energy Conference and Exhibition; 2291-2294
description: The thin film photovoltaic (TFPV) technologies are emerging out as an alternative to the established
silicon wafer based PV technology due to competitive efficiency, and low energy payback period. However, the
performance and degradation study of these technologies are important in order to ensure their stability and reliability
in terms of operating lifetime. The current-voltage (I-V) characteristic of PV module are most widely used for
assessing the electrical performance and degradation. In this paper, the degradation analysis of I-V characteristic of
40 CdTe and 69 micromorph TFPV modules has been carried out after long term outdoor exposure. The degradation
rate of electrical parameters i.e. short circuit current; open circuit voltage; current, voltage and power at maximum
power point of individual field aged module has been evaluated with respect to the name plate values. The defects of
the modules have been identified using visual inspection and electro-luminescence imaging (EL) which are then
correlated with the electrical degradation. The degradation of CdTe and micromorph TFPV technologies are found to
be 0.55%year and 6.52% in the first year respectively with respect to the nameplate value. The power output of
micromorph modules have degraded by 17% after 1 year of outdoor exposure with respect to the power output of
unexposed modules due to light induced degradation.
Efficacy of the SU(3) scheme for ab initio large-scale calculations beyond the lightest nuclei
Creators: name: Dytrych, T.
name: Maris, P.
name: Launey, K. D.
name: Draayer, J. P.
name: Vary, J. P.
name: Langr, D.
name: Saule, E.
name: Caprio, M. A.
name: Catalyurek, U.
name: Sosonkina, M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We report on the computational characteristics of ab initio nuclear structure calculations in a symmetry-adapted no-core shell model (SA-NCSM) framework. We examine the computational complexity of the current implementation of the SA-NCSM approach, dubbed LSU3shell, by analyzing ab initio results for 6Li and 12C in large harmonic oscillator model spaces and SU(3)-selected subspaces. We demonstrate LSU3shell's strong-scaling properties achieved with highly-parallel methods for computing the many-body matrix elements. Results compare favorably with complete model space calculations and significant memory savings are achieved in physically important applications. In particular, a well-chosen symmetry-adapted basis affords memory savings in calculations of states with a fixed total angular momentum in large model spaces while exactly preserving translational invariance.
description: 11 pages, 8 figures
Evaluation of the Durability of Metallization Pastes via Accelerated Aging Method
Creators: name: Lin, H.-C.
name: Chen, Y.-C.
name: Wu, C.-H.
name: Wang, C.-C.
name: Tsai, C.-T.
name: Lin, K.-C.
name: Huang, W.K.W.
Publisher: name: WIP
Year: 2016
Subjects: Operation, Performance, Reliability and Sustainability of Photovoltaics
PV Cells and Modules

description: 32nd European Photovoltaic Solar Energy Conference and Exhibition; 2259-2260
description: An accelerated aging test with elevated temperature and humidity condition has been investigated and
applied to cell and module fabrication in c-Si PV industry. Not only efficiency enhancement but also durability is the
crucial criteria for metallization paste selection. In this work, a series of solar cells produced with different front-side
or rear-side pastes were fabricated into 1*1 single-module samples. The samples underwent the highly accelerated
stress test (HAST) with the typical test condition of 121°C and 100% relative humidity. The power decay ratio of the
cells with various paste suppliers differed significantly and supposedly resulted from the decrease in fill factor. The
result corresponded to the observations in the electroluminescent images where dark area emerged around soldered
busbars. It is demonstrated that the cells with various metallization pastes displayed distinct ability to resist the
corrosion and HAST is a promising approach to quickly identifying the paste evaluation in the cell production.
In-Situ Monitoring of Moisture Ingress in PV Modules with Different Encapsulants
Creators: name: Jankovec, M.
name: Matic, G.
name: Annigoni, E.
name: Galliano, F.
name: Li, H.-Y.
name: Perret-Aebi, L.-E.
name: Sculati-Meillaud, F.
name: Ballif, C.
name: Topic, M.
Publisher: name: WIP
Year: 2016
Subjects: Operation, Performance, Reliability and Sustainability of Photovoltaics
PV Cells and Modules

description: 32nd European Photovoltaic Solar Energy Conference and Exhibition; 2265-2269
description: In 2015 we presented a new measurement method and setup for in-situ moisture ingress monitoring of
PV modules for laboratory and field testing applications. The method which is based on miniature digital temperature
and humidity sensors was successfully applied to different PV-like stacks with EVA encapsulants. In this work we
present the test results of the experiment with sensors laminated in EVA, TPO, POE and Ionomer encapsulants. All
samples were exposed to elevated humidity and temperature conditions in a climate chamber. Sensors prove to be
robust to the harsh lamination temperature and pressure conditions and produce results that are consistent with the
expected moisture ingress properties of the encapsulants. A one-dimensional equivalent electrical simulation model of
water diffusion into the encapsulant was developed on the basis of the analogy between the diffusion process and
electrical conductivity. The model was implemented in a SPICE simulation program and solved using the transient
analysis. The diffusion coefficient of the EVA was obtained as a free fitting parameter and agrees well with the value
obtained from an independent DVS experiment, validating our method. Although the experiment lacks the reference
diffusion coefficient values of other three tested encapsulants, the fitting results show that the obtained coefficients are
in the expected range according to the manufacturers’ specifications.
Nonlinear and time-resolved optical study of the 112-type iron-based superconductor parent Ca$_{1-x}$La$_{x}$FeAs$_{2}$ across its structural phase transition
Creators: name: Harter, J. W.
name: Chu, H.
name: Jiang, S.
name: Ni, N.
name: Hsieh, D.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The newly discovered 112-type ferropnictide superconductors contain chains of As atoms that break the tetragonal symmetry between the $a$ and $b$ axes. This feature eliminates the need for uniaxial strain that is usually required to stabilize large single domains in the electronic nematic state that exists in the vicinity of magnetic order in the iron-based superconductors. We report detailed structural symmetry measurements of 112-type Ca$_{0.73}$La$_{0.27}$FeAs$_{2}$ using rotational anisotropy optical second harmonic generation. This technique is complementary to diffraction experiments and enables a precise determination of the point group symmetry of a crystal. By combining our measurements with density functional theory calculations, we uncover a strong optical second harmonic response of bulk electric dipole origin from the Fe and Ca $3d$-derived states that enables us to assign $C_2$ as the crystallographic point group. This makes the 112-type materials high-temperature superconductors without a center of inversion, allowing for the possible mixing of singlet and triplet Cooper pairs in the superconducting state. We also perform pump-probe transient reflectivity experiments that reveal a 4.6 THz phonon mode associated with the out-of-plane motion of As atoms in the FeAs layers. We do not observe any suppression of the optical second harmonic response or shift in the phonon frequency upon cooling through the reported monoclinic-to-triclinic transition at 58 K. This allows us to identify $C_1$ as the low-temperature crystallographic point group but suggests that structural changes induced by long-range magnetic order are subtle and do not significantly affect electronic states near the Fermi level.
Feedback from active galactic nuclei in galaxy groups
Creators: name: Eckert, Dominique
Publisher: name: Zenodo
Year: 2023

description: The co-evolution between supermassive black holes and their environment is most directly traced by the hot atmospheres of dark matter halos. Cooling of the hot atmosphere supplies the central regions with fresh gas, igniting active galactic nuclei (AGN) with long duty cycles. Outflows from the central engine tightly couple with the surrounding gaseous medium and provide the dominant heating source preventing runaway cooling by carving cavities and driving shocks across the medium. The AGN feedback loop is a key feature of all modern galaxy evolution models. Here I review our knowledge of the AGN feedback process in the specific context of galaxy groups. Galaxy groups are uniquely suited to constrain the mechanisms governing the cooling-heating balance. Unlike in more massive halos, the energy supplied by the central AGN to the hot intragroup medium can exceed the gravitational binding energy of halo gas particles. I also describe how our knowledge of the AGN feedback process impacts on galaxy evolution models and on large-scale baryon distributions.
Estimation of continuous environments by robot swarms: Correlated networks and decision-making
Creators: name: Raoufi, Mohsen
name: Romanczuk, Pawel
name: Hamann, Heiko
Publisher: name: arXiv
Year: 2023
Subjects: subject: Robotics (cs.RO)
subject: Artificial Intelligence (cs.AI)
subject: Multiagent Systems (cs.MA)
subject: FOS: Computer and information sciences

description: Collective decision-making is an essential capability of large-scale multi-robot systems to establish autonomy on the swarm level. A large portion of literature on collective decision-making in swarm robotics focuses on discrete decisions selecting from a limited number of options. Here we assign a decentralized robot system with the task of exploring an unbounded environment, finding consensus on the mean of a measurable environmental feature, and aggregating at areas where that value is measured (e.g., a contour line). A unique quality of this task is a causal loop between the robots' dynamic network topology and their decision-making. For example, the network's mean node degree influences time to convergence while the currently agreed-on mean value influences the swarm's aggregation location, hence, also the network structure as well as the precision error. We propose a control algorithm and study it in real-world robot swarm experiments in different environments. We show that our approach is effective and achieves higher precision than a control experiment. We anticipate applications, for example, in containing pollution with surface vehicles.
description: \c{opyright} Accepted at IEEE/International Conference on Robotics and Automation (ICRA) 2023, 7 pages, 7 figures
One-dimensional parametric determining form for the two-dimensional Navier-Stokes equations
Creators: name: Foias, Ciprian
name: Jolly, Michael S.
name: Lithio, Daniel
name: Titi, Edriss S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: The evolution of a determining form for the 2D Navier-Stokes equations (NSE), which is an ODE on a space of trajectories is completely described. It is proved that at every stage of its evolution, the solution is a convex combination of the initial trajectory and the fixed steady state, with a dynamical convexity parameter $θ$, which will be called the characteristic determining parameter. That is, we show a remarkable separation of variables formula for the solution of the determining form. Moreover, for a given initial trajectory, the dynamics of the infinite-dimensional determining form are equivalent to those of the characteristic determining parameter $θ$ which is governed by a one-dimensional ODE. %for the parameter specifying the position on the line segment. This one-dimensional ODE is used to show that if the solution to the determining form converges to the fixed state it does so no faster than $\mathcal{O}(τ^{-1/2})$, otherwise it converges to a projection of some other trajectory in the global attractor of the NSE, but no faster than $\mathcal{O}(τ^{-1})$, as $τ\to \infty$, where $τ$ is the evolutionary variable in determining form. The one-dimensional ODE also exploited in computations which suggest that the one-sided convergence rate estimates are in fact achieved. The ODE is then modified to accelerate the convergence to an exponential rate. Remarkably, it is shown that the zeros of the scalar function that governs the dynamics of $θ$, which are called characteristic determining values, identify in a unique fashion the trajectories in the global attractor of the 2D NSE. Furthermore, the one-dimensional characteristic determining form enables us to find unanticipated geometric features of the global attractor, a subject of future research.
5α-reductase in the rat testis during development
Creators: name: Killian, Jessica.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Women of the Black Panther Party: The Struggle is Real
Creators: name: SMITH, FELICIA
Publisher: name: Stanford Digital Repository
Year: 2023
Subjects: subject: Black Panther Party

description: Felicia Smith was featured as the speaker at a Fireside Chat at the Black Community Services Center to celebrate Black History Month. This event was hosted by Stanford's Black Panther Party Reading Group and included discussions about Felicia's event as part of Stanford Libraries' Justice, Equity, Diversity and Inclusion (JEDI) Fair in October 2022, that was a book signing event with three women of the Black Panther Party Ericka Huggins, Rosita Thomas and M. Gayle Asali Dickson.
Reliability of Bonding of the Rail Attachment Fixture to the Rear Glass of Dual-Glass PV Modules
Creators: name: Mao, J.
name: Zhu, Q.
name: Xu, J.
name: Shen, H.
name: Shu, Y.
name: Ji, Z.
name: Verlinden, P.J.
name: Feng, Z.Q.
Publisher: name: WIP
Year: 2016
Subjects: Operation, Performance, Reliability and Sustainability of Photovoltaics
PV Cells and Modules

description: 32nd European Photovoltaic Solar Energy Conference and Exhibition; 2255-2258
description: A rail attachment fixture bonded to the back of dual-glass modules presents several advantages
compared to standard clamp systems. This paper reports on the reliability of the bonding technology for dual-glass
PV modules. A detailed research of the bonding reliability of the back rail attachment fixture for dual-glass modules
is presented in this paper. The bonding is based on silicone structural adhesive bonding to dual-glass modules. A full
set of environmental tests from IEC61215 standard of photovoltaic industry were carried out to explore and analyze
the bonding adhesive. Silicone adhesive is well known to be sensitive to water vapor and has high water permeability.
It is prone to hydrolysis, which can lead to a lower strength of the back rail attachment in high humidity and high
temperature environments. Damp heat (DH) testing was extended to 3,000 hours, which is 3 times of the usual
duration of damp heat testing. Additional testing was carried out to evaluate the reliability of back rail attachment in
harsh environments such as marine, acidic and alkaline environments. Extended experimental analysis shows that the
silicone structural adhesive can meet the safety and reliability of dual-glass modules in long service life.