cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Energy Yield Analysis of Bifacial PV Modules: Different Technologies and Configurations
Creators: name: Gracia Amillo, A.M.
name: Lopez-Garcia, J.
name: Kenny, R.P.
name: Sample, T.
Publisher: name: WIP
Year: 2019
Subjects: Photovoltaic Modules and BoS Components
PV Module Design, Manufacture, Performance and Reliability

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 1165-1170
description: Bifacial crystalline silicon photovoltaic (PV) modules are attracting considerable interest from the PV community and market due to their enhanced performance in comparison to traditional monofacial PV modules, as both sides of the cell can absorb solar radiation. Moreover, new options for system integration such as the east-west (E-W) oriented vertical modules have emerged offering further advantages. The scarce data of field performance can be considered an issue to be addressed since energy yield data and performance analysis under real working conditions may contribute to the modelling and the energy yield forecast of bifacial devices. This work reports on the performance and energy yield of various bifacial PV modules installed outdoors over an artificially increased albedo area in a moderate subtropical climate for a 10-11 months period. Two high bifaciality modules were installed vertically E-W oriented and tilted south-oriented. Furthermore, three bifacial PV modules from different manufacturers, technologies and bifacialities along with a monofacial reference module were mounted in a south-oriented rack at a fixed angle. The results showed a total energy yield of the vertical module 15.9% lower than the tilted one. Similarly, the three tilted bifacial modules showed an overall performance 26.5% higher than the monofacial device.
Transverse single asymmetries in pi0 production in p+p, p+Al, p+Au collisions at mid-rapidity using the PHENIX detector system
Creators: name: Novitzky, Norbert
Publisher: name: Zenodo
Year: 2021
Subjects: spin16
phenix
transverse spin asymmetry
p+p
p+al
p+au
π0
spin
mid-rapidity
forward-rapidity

description: Talk presented at the 22nd International Spin Symposium conference
Topological branes, p-algebras and generalized Nahm equations
Creators: name: Bonelli, Giulio
name: Tanzini, Alessandro
name: Zabzine, Maxim
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Inspired by the recent advances in multiple M2-brane theory, we consider the generalizations of Nahm equations for arbitrary p-algebras. We construct the topological p-algebra quantum mechanics associated to them and we show that this can be obtained as a truncation of the topological p-brane theory previously studied by the authors. The resulting topological p-algebra quantum mechanics is discussed in detail and the relation with the M2-M5 system is pointed out in the p=3 case, providing a geometrical argument for the emergence of the 3-algebra structure in the Bagger-Lambert-Gustavsson theory
description: 20 pages
Additional file 3 of High procalcitonin levels associated with increased intensive care unit admission and mortality in patients with a COVID-19 infection in the emergency department
Creators: name: Tong-Minh, Kirby
name: van der Does, Yuri
name: Engelen, Susanna
name: de Jong, Evelien
name: Ramakers, Christian
name: Gommers, Diederik
name: van Gorp, Eric
name: Endeman, Henrik
Publisher: name: figshare
Year: 2022
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 110309 Infectious Diseases
subject: 60506 Virology
subject: Computational Biology

description: Additional file 3. Univariate analysis of natural logarithm of procalcitonin on a severe COVID-19 infection.
Three-dimensional AdS gravity and extremal CFTs at c=8m
Creators: name: Avramis, Spyros D.
name: Kehagias, Alex
name: Mattheopoulou, Constantina
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We note that Witten's proposed duality between extremal c=24k CFTs and three-dimensional anti-de Sitter gravity may possibly be extended to central charges that are multiples of 8, for which extremal self-dual CFTs are known to exist up to c=40. All CFTs of this type with central charge 24 or higher, provided that they exist, have the required mass gap and may serve as candidate duals to three-dimensional gravity at the corresponding values of the cosmological constant. Here, we compute the genus one partition function of these theories up to c=88, we give exact and approximate formulas for the degeneracies of states, and we determine the genus two partition functions of the theories up to c=40.
description: 17 pages, harvmac; v2: references added, version accepted in JHEP
Prediction of Potential Power/Yield Loss from LeTID Susceptible Modules
Creators: name: Pander, M.
name: Luka, T.
name: Jäckel, B.
name: Bauer, J.
name: Daßler, D.
name: Ebert, M.
name: Turek, M.
name: Hagendorf, C.
Publisher: name: WIP
Year: 2019
Subjects: Photovoltaic Modules and BoS Components
PV Module Design, Manufacture, Performance and Reliability

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 810-815
description: Light-induced degradation (LID) is a known crystalline silicon cell effect that becomes noticeable in the first hours of light soaking or in the first days to weeks of operation of the PV system. The potential power loss is normally less than 3 % identified in the type approval test according to IEC 61215-2:2016 during stabilization (MQT 19.1), typically with light, at a module temperature of approx. 50 °C. The mechanisms responsible for this include boron-oxygen (BO) complex formation and iron-boron pair dissociation. Since the introduction of PERC (Passivated Emitter Rear Contact) cells, there is another significant degradation mechanism, which occurs increasingly at higher temperatures (≥50 °C). This degradation, known as "Light and elevated Temperature Induced Degradation" (LeTID), is currently insufficiently considered and evaluated during type approval testing. Modules with PERC technology reported power losses of up to 10 %. The degradation rate of LeTID is much lower than e.g. BO. A possible regeneration of the defect also takes much longer. Because of the potential large power losses, the question arises what the potential yield losses of currently available PERC modules with LeTID-sensitive cells are. For this purpose, an estimation of the yield losses for three different sites classified by amount of temperatures above 50 °C was carried out based on the experimentally determined degradation behavior. It was found that in temperate locations the losses in performance increase over the years but are probably difficult to separate from other reductions in performance. In particularly hot locations, it is likely that the reduction in output can regenerate over the years and thus compensate for the average loss in output. In warm locations, a long period of additional power losses of between 4 and 5 % can occur.
Coupled Multi-Physics Model for Simulating Thermal Behavior, Electrical Yield and Structural Reliability of Monofacial and Bifacial Photovoltaic Modules under Desert Environment
Creators: name: Ahzi, S.
name: Aly, S.P.
name: Barth, N.
name: Abdallah, A.
Publisher: name: WIP
Year: 2019
Subjects: Photovoltaic Modules and BoS Components
PV Module Design, Manufacture, Performance and Reliability

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 1081-1086
description: Crystalline silicon (c-Si) technology, including monofacial and bifacial, currently accounts for 96% of the total global annual PV production. In Qatar, the bifacial configuration is capable of producing up to 40% more electrical power compared to its monofacial counterpart, under the same field conditions. Owing to this huge chunk of share in the global market, accurate simulation tools are required to assess the overall performance of these PV systems. This overall performance is evaluated based on the total optical losses within the different layers of the PV module (via radiation modeling), the working temperature of the PV cells (via thermal modeling), the instantaneous electrical yield (via electrical modeling) and structural reliability (via structural modeling) of the PV module. As each of these models have a different physics, it makes the overall PV system modeling a multi-physics approach. The desert conditions, such as those prevalent in the Gulf region, are one of the worst-case scenarios for any PV module. Therefore, in this work, we have developed a fully coupled PV system model to evaluate the overall performance of the PV modules (for both monofacial and bifacial) in the field conditions encountered in Doha, Qatar.
The Relative Consistency of the Axiom of Choice Mechanized Using Isabelle/ZF
Creators: name: Paulson, Lawrence C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences
subject: 03E25, 03E35, 03B35, 68V20

description: The proof of the relative consistency of the axiom of choice has been mechanized using Isabelle/ZF. The proof builds upon a previous mechanization of the reflection theorem. The heavy reliance on metatheory in the original proof makes the formalization unusually long, and not entirely satisfactory: two parts of the proof do not fit together. It seems impossible to solve these problems without formalizing the metatheory. However, the present development follows a standard textbook, Kunen's Set Theory, and could support the formalization of further material from that book. It also serves as an example of what to expect when deep mathematics is formalized.
Sizing of a PV/Battery System through Stochastic Control and Plant Aggregation
Creators: name: Carriere, T.
name: Vernay, C.
name: Pitaval, S.
name: Neirac, F.-P.
name: Kariniotakis, G.
Publisher: name: WIP
Year: 2019
Subjects: PV Systems and Storage – Modelling, Design, Operation and Performance
Storage

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 1346-1350
description: The objective of this work is to reduce the storage dimensions required to operate a coupled photovoltaic (PV) and Battery Energy Storage System (BESS) in an electricity market, while keeping the same level of performance. Performance is measured either with the amount of errors between the energy sold on the market and the actual generation of the PV/BESS i.e. the imbalance, or directly with the revenue generated on the electricity market from the PV/BESS operation. Two solutions are proposed and tested to reduce the BESS size requirement. The first solution is to participate in electricity markets with an aggregation of several plants instead of a single plant, which effectively reduces the uncertainty of the PV power generation. The second is to participate in an intra-day market to reduce the BESS usage. To evaluate the effects of these two solutions on the BESS size requirement, we simulate the control of the PV/BESS system in an electricity market.
On the longitudinal response function of interferometers for massive gravitational waves from a bimetric theory of gravity
Creators: name: Corda, Christian
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Recently, some papers in the literature have shown that, from a bimetric theory of gravity, it is possible to produce massive gravitational waves which generate a longitudinal component in a particular polarization of the wave. After a review of previous works, in this paper the longitudinal response function of interferometers for this particular polarization of the wave is computed in two different gauges, showing the gauge invariance, and in its full frequency dependence, with specific application to the Virgo and LIGO interferometers.
description: Final version published in Astrophysics and Space Science 0004-640X (Print) 1572-946X (Online)
Measurement of double helicity asymmetries in charged pion production at mid-rapidity at PHENIX
Creators: name: Moon, Taebong
Publisher: name: Zenodo
Year: 2021
Subjects: spin16
phenix
helicity
pion
asymmetry
mid-rapidity
spin
gluon
run09
run13
longitudinal spin asymmetry

description: Talk presented at the 22nd International Spin Symposium conference
Failure Diagnosis on Photovoltaic Modules Using Thermography, Electroluminescence, Rgb and I-V Techniques
Creators: name: Gallardo-Saavedra, S.
name: Moreton-Fernandez, A.
name: Jiménez-Martín, M.M.
name: Alonso-Gómez, V.
name: Hernández-Callejo, L.
name: Martinez-Sacristan, O.
name: González-Rebollo, M.A.
name: Morales-Aragonés, J.I.
Publisher: name: WIP
Year: 2019
Subjects: Photovoltaic Modules and BoS Components
PV Module Design, Manufacture, Performance and Reliability

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 1171-1175
description: Different techniques can be used to detect and quantify PV modules anomalies, as visual inspections, electrical tests like the I-V curve test, infrared thermography (IRT) or electroluminescence (EL). PV plants operators usually apply only one or two of them within the Operation and Maintenance (O&M) activities. Additionally, researchers usually studied them separately. However, these methods provide complementary results, glimpsing interesting information about the PV site state. The main strength of the research performed is the simultaneous study of all these inspection techniques, studying the correlation between them. Results confirm that, EL and IRT under current injection on modules are closely correlated, while IRT under normal operation (sun exposure) reveals complementary information not detected in EL but existing in the visible spectrum. In conclusion, it is advisable using as many techniques as possible to characterize the actual state of the module and to explain its I-V curve.
Virial series for fluids of hard hyperspheres in odd dimensions
Creators: name: Rohrmann, Rene D.
name: Robles, Miguel
name: de Haro, Mariano Lopez
name: Santos, Andres
Publisher: name: arXiv
Year: 2008
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: A recently derived method [R. D. Rohrmann and A. Santos, Phys. Rev. E. {\bf 76}, 051202 (2007)] to obtain the exact solution of the Percus-Yevick equation for a fluid of hard spheres in (odd) $d$ dimensions is used to investigate the convergence properties of the resulting virial series. This is done both for the virial and compressibility routes, in which the virial coefficients $B_j$ are expressed in terms of the solution of a set of $(d-1)/2$ coupled algebraic equations which become nonlinear for $d \geq 5$. Results have been derived up to $d=13$. A confirmation of the alternating character of the series for $d\geq 5$, due to the existence of a branch point on the negative real axis, is found and the radius of convergence is explicitly determined for each dimension. The resulting scaled density per dimension $2 η^{1/d}$, where $η$ is the packing fraction, is wholly consistent with the limiting value of 1 for $d \to \infty$. Finally, the values for $B_j$ predicted by the virial and compressibility routes in the Percus-Yevick approximation are compared with the known exact values [N. Clisby and B. M. McCoy, J. Stat. Phys. {\bf 122}, 15 (2006)]
description: 9 pages, 6 figures
The Inverter: A Multi-Purpose Control Element
Creators: name: Alet, P.-J.
name: Adinolfi, G.
name: Barchi, G.
name: Bründlinger, R.
name: Graditi, G.
name: Henze, N.
name: Jung, M.
name: Stavrou, A.
name: Yang, G.
Publisher: name: WIP
Year: 2019
Subjects: Photovoltaic Modules and BoS Components
Inverters and Balance of System Components

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 946-951
description: The need for innovation around the control functions of inverters is great. PV inverters were initially expected to be passive followers of the grid and to disconnect as soon as abnormal conditions happened. Since future power systems will be dominated by generation and storage resources interfaced through inverters these converters must move from following to forming and sustaining the grid. As “digital natives” PV inverters can also play an important role in the digitalisation of distribution networks. In this short review we identified a large potential to make the PV inverter the smart local hub in a distributed energy system. At the micro level, costs and coordination can be improved with bidirectional inverters between the AC grid and PV production, stationary storage, car chargers and DC loads. At the macro level the distributed nature of PV generation means that the same devices will support both to the local distribution network and to the global stability of the grid. Much success has been obtained in the former. The later remains a challenge, in particular in terms of scaling. Yet there is some urgency in researching and demonstrating such solutions. And while digitalisation offers promise in all control aspects it also raises significant cybersecurity concerns.
Additional file 4 of High procalcitonin levels associated with increased intensive care unit admission and mortality in patients with a COVID-19 infection in the emergency department
Creators: name: Tong-Minh, Kirby
name: van der Does, Yuri
name: Engelen, Susanna
name: de Jong, Evelien
name: Ramakers, Christian
name: Gommers, Diederik
name: van Gorp, Eric
name: Endeman, Henrik
Publisher: name: figshare
Year: 2022
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 110309 Infectious Diseases
subject: 60506 Virology
subject: Computational Biology

description: Additional file 4. Multivariable logistic regression model with different cut-off values of procalcitonin.
Process Optimization for Inline Black Silicon Based Solar Cell Production Line
Creators: name: Raval, M.C.
name: Gok, S.
name: Melnyk, I.
name: Teppe, A.
name: Eren, T.
name: Comak, M.
name: Hu, B.
name: Zhou, J.
name: Madugula, S.
name: Ender, M.
name: Jooss, W.
name: Fath, P.
Publisher: name: WIP
Year: 2019
Subjects: Silicon Materials and Cells
Manufacturing & Production of Si Cells

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 410-414
description: Whereas technological challenges in the slicing process have been mainly solved, efforts are being undertaken to develop cost-effective and efficient technologies for texturing DWS sliced mc-Si and mono c-Si wafers. Another trigger point is the development of a texturing technology which can be applied to mc-Si and mono c-Si wafers without compromising on the optical properties. The relevance of this work is integration of Metal Catalyst Chemical Etching based inline texturing process for mc-Si and mono c-Si wafers in production environment. Average production efficiency of 18.7% is obtained for mc-Si Al-BSF cells, while average efficiency of 19.5% is obtained for mc-Si PERC trails. Production of mono PERC cells based on MCCE inline texturing resulted in average and best efficiency of 20.7% and 21.0%, respectively. Trails for inverted pyramids based texturing for mono c-Si PERC cells led to Isc value of 9.6 A which is comparable to alkaline textured reference PERC cells. This confirms that inverted pyramids based texturing is a prospective commercial alternative to standard alkaline based texturing for mono c-Si wafers with reduction in the CoO. The results also demonstrate the commercial potential of the inline process to texture multi c-Si and mono c-Si wafers for solar cell production.
Dynamics of wrinkles on a vesicle in external flow
Creators: name: Turitsyn, K. S.
name: Vergeles, S. S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Recent experiments by Kantsler et. al. (2007) have shown that the relaxational dynamics of a vesicle in external elongation flow is accompanied by the formation of wrinkles on a membrane. Motivated by these experiments we present a theory describing the dynamics of a wrinkled membrane. Formation of wrinkles is related to the dynamical instability induced by negative surface tension of the membrane. For quasi-spherical vesicles we perform analytical study of the wrinkle structure dynamics. We derive the expression for the instability threshold and identify three stages of the dynamics. The scaling laws for the temporal evolution of wrinkling wavelength and surface tension are established and confirmed numerically.
description: 4 pages, 2 figures
Cosmological gravity on all scales II: Model independent modified gravity $N$-body simulations
Creators: name: Srinivasan, Sankarshana
name: Thomas, Daniel B
name: Pace, Francesco
name: Battye, Richard
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Model-independent constraints on modified gravity models hitherto exist mainly on linear scales. A recently developed formalism presented a consistent parameterisation that is valid on all scales. Using this approach, we perform model-independent modified gravity $N$-body simulations on all cosmological scales with a time-dependent $μ$. We present convergence tests of our simulations, and we examine how well existing fitting functions reproduce the non-linear matter power spectrum of the simulations. We find that although there is a significant variation in the accuracy of all of the fitting functions over the parameter space of our simulations, the ReACT framework delivers the most consistent performance for the matter power spectrum. We comment on how this might be improved to the level required for future surveys such as Euclid and the Vera Rubin Telescope (LSST). We also show how to compute weak-lensing observables consistently from the simulated matter power spectra in our approach, and show that ReACT also performs best when fitting the weak-lensing observables. This paves the way for a full model-independent test of modified gravity using all of the data from such upcoming surveys.
description: 32 pages, 14 Figures; Comments welcome
Nowcasting of Irradiance Using a Network of All-Sky-Imagers
Creators: name: Blum, N.
name: Schmidt, T.
name: Nouri, B.
name: Wilbert, S.
name: Peerlings, E.
name: Heinemann, D.
name: Schmidt, T.
name: Kuhn, P.
name: Kazantzidis, A.
name: Zarzalejo, L.F.
name: Pitz-Paal, R.
Publisher: name: WIP
Year: 2019
Subjects: PV Systems and Storage – Modelling, Design, Operation and Performance
Solar Resource and Forecasting

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 1403-1409
description: Electric power grids are increasingly penetrated by generation from photovoltaic (PV) systems. The volatility of solar irradiance can therefore cause problematic fluctuations of grid voltage and frequency. For local low voltage power grid sections highly accurate nowcasts of the short-term local PV-power generation may enable higher PV penetration by employing short-term flexibility options while saving investments in grid-infrastructure. Systems of up to four All-Sky-Imagers (ASI) have been used successfully to nowcast direct and global irradiance as well as the production of solar power plants. In Oldenburg and the surrounding area these systems are enhanced by interconnecting 34 All-Sky-Imagers in a measurement network called Eye2Sky. Intermediate results can be combined and exchanged between systems with overlapping observation areas but also between systems up to 100 km apart. To demonstrate the potential of the approach three state-of-the-art 2-ASI-systems from the network are selected. Nowcasts of the individual systems are averaged weighting each prediction by its expected accuracy in the single points of the forecast domain. In a validation period of 86 days the network outperforms a single 2-ASI-system. For all lead times greater than zero, significantly lower root mean square errors are found compared to the 2-ASI system. For highly variable time intervals the root mean square error is reduced by up to 50 %. The network´s combined nowcast is found to reduce forecast errors related to the often uncertain cloud edge positions and further systematic errors found in single 2-ASI-systems.
The Early Evolution of Massive Stars: Radio Recombination Line Spectra
Creators: name: Keto, Eric
name: Zhang, Qizhou
name: Kurtz, Stanley
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Velocity shifts and differential broadening of radio recombination lines are used to estimate the densities and velocities of the ionized gas in several hypercompact and ultracompact HII regions. These small HII regions are thought to be at their earliest evolutionary phase and associated with the youngest massive stars. The observations suggest that these HII regions are characterized by high densities, supersonic flows and steep density gradients, consistent with accretion and outflows that would be associated with the formation of massive stars.
description: ApJ in press
Integrated molecular optomechanics with hybrid dielectric-metallic resonators
Creators: name: Shlesinger, Ilan
name: Cognée, Kévin G.
name: Verhagen, Ewold
name: Koenderink, A. Femius
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Molecular optomechanics stems from the description of Raman scattering in the presence of an optical resonator using a cavity optomechanics formalism. We extend the molecular optomechanics formalism to the case of hybrid dielectric-plasmonic resonators, with multiple optical resonances and with both free-space and waveguide addressing. We demonstrate how the Raman enhancement is the product of a pump enhancement and a modified LDOS, that simply depend on the complex response functions of the hybrid system. The Fano lineshapes that result from hybridization of a broadband and narrowband modes allows reaching strong Raman enhancement with high-Q resonances, paving the way towards sideband resolved molecular optomechanics. The model allows prediction of the Raman emission ratio into different output ports and enables demonstrating a fully integrated high-Q Raman resonator exploiting multiple cavity modes coupled to the same waveguide.
description: 12 pages, 7 figures
A weak lensing analysis of the Abell 2163 cluster
Creators: name: Radovich, M.
name: Puddu, E.
name: Romano, A.
name: Grado, A.
name: Getman, F.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Weak lensing analysis is applied to a deep, one square degree r-band CFHT-Megacam image of the Abell 2163 field. The observed shear is fitted with Single Isothermal Sphere and Navarro-Frenk-White models to obtain the velocity dispersion and the mass, respectively; in addition, aperture densitometry is also used to provide a mass estimate at different distances from the cluster centre. The luminosity function is finally derived, allowing to estimate the mass/luminosity ratio. Previous weak lensing analyses performed at smaller scales produced somewhat contradictory results. The mass and velocity dispersion obtained in the present paper are compared and found to be in good agreement with the values computed by other authors from X-ray and spectroscopic data.
description: 8 pages, 9 figures, Accepted for publication on Astronomy & Astrophysics, final version
Photocurrent Spectra and Transport Characterizations on Halide Perovskites Thin Films
Creators: name: Lin, H.-J.
name: Rebai, A.
name: Cacovich, S.
name: Rousset, J.
name: Longeaud, C.
Publisher: name: WIP
Year: 2019
Subjects: New Materials and Concepts for Photovoltaic Devices
Fundamental Studies

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 18-21
description: In this work we present a study of the transport parameters of multi-cation halide perovskite thin films under different states: as-deposited, light-soaked and after several days of recovery. These transport parameters (dark and photo- conductivity, density of states, diffusion length) were investigated by steady state dark and photo-current measurements as well as by advanced characterization techniques such as Fourier transform photocurrent spectroscopy (FTPS) and steady state photocarrier grating (SSPG) experiment. FTPS is a powerful technique that allows to analyze the weak absorption due to states present in the gap of semiconductor materials down to photon energy of 1 eV or even smaller. The SSPG technique allows to estimate the ambipolar diffusion length of the same type of materials. Deduced from these three experiments, the evolution of the transport parameters of triple cation perovskite with light-soaking and recovery are underlined.
PRECONDITIONS FOR COLD AIR OUTBREAKS AND PREDICTION SKILL
Creators: name: Polkova, Iuliia
name: Baehr, Johanna
name: Gerstman-Afargan, Hilla
name: Domeisen, Daniela
name: Ruggieri, Paolo
name: Athanasiadis, Panos
name: King, Martin
name: Kolstad, Erik
Publisher: name: Zenodo
Year: 2019

description: An abstract of the contribution presented at the Workshop on Climate Prediction in the Atlantic-Arctic sector organised by the Bjerknes Climate Prediction Unit and the EU Modelling Cluster on 5-7th June 2019, Bergen, Norway.
M2-brane Probe Dynamics and Toric Duality
Creators: name: Kim, Seok
name: Lee, Sangmin
name: Lee, Sungjay
name: Park, Jaemo
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the dynamics of a single M2-brane probing toric Calabi-Yau four-fold singularity in the context of the recently proposed M-theory crystal model of AdS4/CFT3 dual pairs. We obtain an effective abelian gauge theory in which the charges of the matter fields are given by the intersection numbers between loops and faces in the crystal. We argue that the probe theory captures certain aspects of the CFT3 even though the true M2-brane CFT is unlikely to be a usual gauge theory. In particular, the moduli space of vacua of the gauge theory coincides precisely with the Calabi-Yau singularity. Toric duality, partial resolution, and a possibility of new RG flows are also discussed.
description: 50 pages, 24 figures; v2. title changed, abstract and introduction clarified. to appear in Nucl.Phys.B
Experience on MW-Sized Hybrid PV, Battery Storage and Genset System; Case Study of St. Eustatius Island
Creators: name: Garralaga Rojas, E.
name: Sadri, H.
name: Krueger, W.
Publisher: name: WIP
Year: 2019
Subjects: PV Systems and Storage – Modelling, Design, Operation and Performance
Storage

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 1363-1365
description: Diesel Generators (DGs) are the most common power generation source in islands as they are a reliable and well known established technology. However grid operators tend to reduce their dependence on DGs mainly due to their operational cost, typically driven by diesel fuel and preventive maintenance. The usage of renewable energy sources and especially photovoltaic (PV) systems is starting to become widely spread. However problems associated with high penetration of renewables arise such as fluctuation of renewable resources, grid stability and constant renewable reliance on grid availability. These problems are even more difficult to overcome on MW-sized systems due to their control complexity and electrical protection schemes. Hybrid systems consisting of more than one power source such as PV combined with DGs and battery energy storage systems (BESS) are becoming increasingly attractive due to their economic advantages coupled with lower levelized cost of electricity compared to pure DG systems. In this paper, we share our experience on how to reach 100% solar fraction in MW-sized isolated grids using a hybrid system. The real case of the Caribbean island of St. Eustatius is presented and the performance analysis and results gained during the first years of operation are demonstrated.
Additional file 1 of Surveillance of physical activity and sedentary behaviour in czech children and adolescents: a scoping review of the literature from the past two decades
Creators: name: Materová, Eliška
name: Pelclová, Jana
name: Gába, Aleš
name: Frömel, Karel
Publisher: name: figshare
Year: 2022
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy

description: Additional file 1.
The reduced effect of a single scattering with a low-mass particle via a point interaction
Creators: name: Clark, Jeremy
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 81U05; 81V80

description: In this article, we study a second-order expansion for the effect induced on a large quantum particle which undergoes a single scattering with a low-mass particle via a repulsive point interaction. We give an approximation with third-order error in $λ$ to the map $G\to \Tr_{2}[(I\otimes ρ)S_λ^{*}(G\otimes I)S_λ]$, where $G\in \Bi(L^{2}(\R^{n}))$ is a heavy-particle observable, $ρ\in \Bi_{1}(\R^{n})$ is the density matrix corresponding to the state of the light particle, $λ=\frac{m}{M}$ is the mass ratio of the light particle to the heavy particle, $S_λ\in \Bi(L^{2}(\R^{n})\otimes L^{2}(\R^{n}))$ is the scattering matrix between the two particles due to a repulsive point interaction, and the trace is over the light-particle Hilbert space. The third-order error is bounded in operator norm for dimensions one and three using a weighted operator norm on $G$.
description: 21 pages, typos have been corrected from previous version and a reference was updated
On the almost sure spiraling of geodesics in negatively curved manifolds
Creators: name: Hersonsky, Sa'ar
name: Paulin, Frédéric
Publisher: name: arXiv
Year: 2007
Subjects: subject: Differential Geometry (math.DG)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 53C22, 37D40, 11J61, 37A45, 30F40, 11J83

description: Given a negatively curved geodesic metric space $M$, we study the statistical asymptotic penetration behavior of (locally) geodesic lines of $M$ in small neighborhoods of points, of closed geodesics, and of other compact (locally) convex subsets of $M$. We prove Khintchine-type and logarithme law-type results for the spiraling of geodesic lines around these objets. As a consequence in the tree setting, we obtain Diophantine approximation results of elements of non-archimedian local fields by quadratic irrational ones.
description: 35 pages, 5 figures
Efficient indoor design in slum rehabilitation: A systematic simulation for optimized energy and experiential indoor environmental quality (e-IEQ)
Creators: name: Sarkar, A
name: Bardhan, R
Publisher: name: IBPSA
Year: 2020
Subjects: 33 Built Environment and Design
3301 Architecture
7 Affordable and Clean Energy

description: Efficient Indoor Design in Slum Rehabilitation: A Systematic Simulation for Optimized Energy and experiential Indoor Environmental Quality (e-IEQ)
Investigating Defect States in Crystalline Silicon with Temperature and Injection Dependent Lifetime Spectroscopy
Creators: name: Syre Wiig, M.
name: Søndenå, R.
name: Marstein, E.S.
name: Haug, H.
Publisher: name: WIP
Year: 2019
Subjects: Silicon Materials and Cells
Feedstock, Crystallisation, Wafering, Defect Engineering

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 107-111
description: Light induced degradation (LID) in both mono- and multicrystalline silicon can severely reduce the bulk lifetime. A pre-treatment of CZ-Si with high intensity illumination up to 7 suns at 180 °C for 10 minutes has reduced the concentration of active boron-oxygen-related (BO) recombination centers by 80% showing a stable lifetime under illumination at room temperature. Temperature- and injection dependent lifetime spectroscopy was used to identify the capture cross section ratio = / and the defect energy level for different light-sensitive defects in Si. The BOLID defect parameters in CZ-Si were found to be: = 15 and = 0.29 or 0.73 eV. For the unknown defect causing light and elevated temperature induced degradation (LeTiD) in fired multicrystalline Si wafers a similar energy level of = 0.28 or 0.73 eV was found, but with a higher capture cross section ratio of = 33. Simulations showed that lifetime spectroscopy cannot separate these two recombination centers if simultaneously present together with a third defect.
Numerical and Experimental Investigations on the Effect of Different Frame and Mounting Configurations of PV Modules for Crack Propagation and Degradation
Creators: name: Papargyri, L.
name: Theristis, M.
name: Livera, A.
name: Kubicek, B.
name: Papanastasiou, P.
name: Georghiou, G.E.
Publisher: name: WIP
Year: 2019
Subjects: Photovoltaic Modules and BoS Components
PV Module Design, Manufacture, Performance and Reliability

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 1087-1090
description: Cracks in wafer-based silicon solar cells are a well-known problem in the photovoltaic (PV) industry. Their formation is inevitable during either the manufacturing or the service life of a module and up to now it is not clear how to quantify their impact on PV performance. In order to improve the reliability and thus the lifetime of crystalline silicon (c-Si) PV modules, it is crucial to examine the environmental effects on the performance of modules and to also understand the exact causes of module degradation. Currently, commercial c-Si PV modules offer a 25-year warranty and their reliability and durability over this time period is considered as proven when a module successfully qualifies the tests according to IEC 61215. In practice though, there is currently no available parameter for the mechanical strength of cells and wafers, which guarantees the reliability of an individual module. In this study, an advanced experimental testing and a finite element analysis (FEA) model are conducted in order to identify the effect of clamping and frame on the durability of PV modules and hence to quantify the electromechanical degradation due to cell cracks. The above techniques could be used to optimize the material properties and frame structure for improved durability and reliability of PV modules.
Evaluation of Tilt Angle Effect on Soiling of PV Modules in Dubai, UAE
Creators: name: Elnosh, A.
name: Safieh, A.
name: Kaiss, E.-C.-A.-K
name: Albadwawi, O.M.
name: John, J.J.
name: Alnuaimi, A.
Publisher: name: WIP
Year: 2019
Subjects: Photovoltaic Modules and BoS Components
PV Module Design, Manufacture, Performance and Reliability

description: 36th European Photovoltaic Solar Energy Conference and Exhibition; 1176-1179
description: The objective of this work is to study and evaluate the effect of inclination on the soiling losses of PV modules installed in the desert environment of Dubai, UAE. The daily soiling rates are calculated for 25 PV modules consisting of four monocrystalline silicon (mono-Si) and one Cadmium Telluride (CdTe) each installed at five different tilt angles from horizontal to vertical: 0˚, 15˚, 25˚, 35˚ and 90˚. All of the studied modules are installed in a south facing multi-tilt mounting structure, and the study period is September 2018 - August 2019. The soiling rate calculation is based on the daily rate of change of a temperature-corrected performance metric (PM), using the Theil-Sen estimator. Results show that higher tilt angles result in reduction of the soiling losses, where the daily soiling rates averaged across the study period range between -0.044% per day for the 90˚ tilt and -0.44% per day for the 0˚ tilt. It is also found that the month-to-month variability of soiling rates also decreases with higher tilts.
Additional file 2 of Surveillance of physical activity and sedentary behaviour in czech children and adolescents: a scoping review of the literature from the past two decades
Creators: name: Materová, Eliška
name: Pelclová, Jana
name: Gába, Aleš
name: Frömel, Karel
Publisher: name: figshare
Year: 2022
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy

description: Additional file 2.
Deep surface photometry of edge-on spirals in Abell galaxy clusters: constraining environmental effects
Creators: name: Santiago, Basilio X.
name: Vale, Tibério B.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: There is a clear scarcity of structural parameters for stellar thick discs, especially for spiral galaxies located in high-density regions, such as galaxy clusters and compact groups. We have modelled the thin and thick discs of 4 edge-on spirals located in Abell clusters: NGC 705, ESO243G49, ESO187G19, LCSBS0496P. Deep I band images of NGC 705 were taken from the HST archive, whereas the remaining images were obtained with the Southern Telescope for Astrophysical Research (SOAR) in Gunn r filter. They reached surface brightness levels of $μ_I \simeq 26.0$ mag arcsec$^{-2}$ and $μ_r \simeq 26.5$ mag arcsec$^{-2}$, respectively. Profiles were extracted from the deep images, in directions both parallel and perpendicular to the major axis. Profile fits were carried out at several positions, yielding horizontal and vertical scale parameters for both thin and thick disc components. The extracted profiles and fitted disc parameters vary from galaxy to galaxy. Two galaxies have a horizontal profile with a strong down-turn at outer radii, preventing a simple exponential from fitting the entire range. For the 2 early-type spirals, the thick discs have larger scalelengths than the thin discs, whereas no trend is seen for the later types . Both the thin and thick discs sampled tend to have similar scalelengths and scaleheights when compared to typical field disc galaxies. However, the thin disc parameters of the 2 farthest galaxies, both late-type spirals, may be significantly affected by seeing effects. Taken at face value, our results suggest that environment plays a minor role in determining the thin and thick disc sizes.
description: 12 pages, 11 figures, approved for publication in Astronomy & Astrophysics
Compact quantum electrodynamics in 2+1 dimensions and spinon deconfinement: a renormalization group analysis
Creators: name: Nogueira, Flavio S.
name: Kleinert, Hagen
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss compact (2+1)-dimensional Maxwell electrodynamics coupled to fermionic matter with N replica. For large enough N, the latter corresponds to an effective theory for the nearest neighbor SU(N) Heisenberg antiferromagnet, in which the fermions represent solitonic excitations known as spinons. Here we show that the spinons are deconfined for $N>N_c=36$, thus leading to an insulating state known as spin liquid. A previous analysis considerably underestimated the value of $N_c$. We show further that for $20
description: 10 pages, 1 figure; v2: references added
Supplementary document for Distinguishing between coherent and incoherent signals in excitation-emission spectroscopy - 5293023.pdf
Creators: name: De Sio, Antonietta
name: Lünemann, Daniel C.
name: Thomas, Anitta
name: Xu, Jingjing
name: Bartölke, Rabea
name: Mouritsen, Henrik
name: Lienau, Christoph
Publisher: name: Optica Publishing Group
Year: 2021
Subjects: Uncategorized

description: Revised Supplemental, S1-S6
Additional file 3 of Surveillance of physical activity and sedentary behaviour in czech children and adolescents: a scoping review of the literature from the past two decades
Creators: name: Materová, Eliška
name: Pelclová, Jana
name: Gába, Aleš
name: Frömel, Karel
Publisher: name: figshare
Year: 2022
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy

description: Additional file 3.
Turbulence model performance for ventilation components pressure losses
Creators: name: Tawackolian, Karsten
name: Kriegel, Martin
Publisher: name: Technische Universität Berlin
Year: 2021
Subjects: subject: 620 Ingenieurwissenschaften und zugeordnete Tätigkeiten
subject: CFD
subject: ductwork
subject: HVAC
subject: model calibration
subject: simulation
subject: turbulence model

description: This study looks to find a suitable turbulence model for calculating pressure losses of ventilation components. In building ventilation, the most relevant Reynolds number range is between 3×10 4 and 6×10 5 , depending on the duct dimensions and airflow rates. Pressure loss coefficients can increase considerably for some components at Reynolds numbers below 2×10 5 . An initial survey of popular turbulence models was conducted for a selected test case of a bend with such a strong Reynolds number dependence. Most of the turbulence models failed in reproducing this dependence and predicted curve progressions that were too flat and only applicable for higher Reynolds numbers. Viscous effects near walls played an important role in the present simulations. In turbulence modelling, near-wall damping functions are used to account for this influence. A model that implements near-wall modelling is the lag elliptic blending k-ε model. This model gave reasonable predictions for pressure loss coefficients at lower Reynolds numbers. Another example is the low Reynolds number k-ε turbulence model of Wilcox (LRN). The modification uses damping functions and was initially developed for simulating profiles such as aircraft wings. It has not been widely used for internal flows such as air duct flows. Based on selected reference cases, the three closure coefficients of the LRN model were adapted in this work to simulate ventilation components. Improved predictions were obtained with new coefficients (LRNM model). This underlined that low Reynolds number effects are relevant in ventilation ductworks and give first insights for suitable turbulence models for this application. Both the lag elliptic blending model and the modified LRNM model predicted the pressure losses relatively well for the test case where the other tested models failed.