cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
High-Throughput Solar Cell Passivation on In-Line Levitrack ALD Al2O3 System - Demonstration of Process Performance
Creators: name: Vermont, P.
name: Kuznetsov, V.
name: Granneman, E.H.A.
Publisher: name: WIP
Year: 2011
Subjects: Wafer-based Silicon Solar Cells and Materials Technology
Silicon Solar Cell Improvements

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 1644-1647
description: In the Levitrack, a novel type of system for the deposition of ALD Al2O3 films, wafers are transported
in a linear track. During the process, the wafers are floating on a gas bearing. During the entire process there is no
physical contact with the track walls. The combination of a gravitational force and viscous drag ensure a constant
transport velocity of the wafers through the track. The ALD cells and the dimensions of the track, along with the gas
and precursor pressures and flows, are designed such that no mixing of the precursors takes place inside the system.
This results in a system that operates under atmospheric conditions, has easy automation, does not have moving parts
(except the wafers) and operates without deposition on the track walls (eliminating the need for periodic cleaning).
This work presents the results of marathon runs on the Levitrack. During the marathon runs the system operated at
200 °C. The article presents throughput numbers, deposition uniformity, deposition repeatability, TMA efficiency,
power consumption and lifetime.
[19 Ansichten auf Caen]
Creators: name: Neurdein, Antonin L.
name: Neurdein, Étienne
name: Neurdein Frères
Publisher: name: [s.n.]
Year: 1870

description: [Caen]
description: 112 Caen - l'Église de la Trinité, Ababaye aux Dames
description: Caen - Église Saint-Pierre, la Nef et le Coeur
description: Caen - Église Saint-Pierre
description: 109 Caen - L'Abside de l'Église Saint-Étienne, Abbaye aux Hommmes
description: Caen - Abbaye aux Hommmes
description: 134 Caen - La Tour des Gens d'Armés, XVIe Siècle
description: 135 Caen - Le Chateâu, la Porte de Secours XV Siècle
description: 183 Caen [...]
description: 101 Caen - Vue générale prise de l'Abbaye aux Dames
description: Caen - l'Église de la Trinité, Ababaye aux Dames
description: 123 Caen - l'Église Saint-Sauveur
description: 104 Caen - Abside de Église Saint-Pierre
description: Caen - La Nef de l'Église Saint-Étienne, Abbaye aux Hommmes
description: Caen - Les Flèches de l'Église Saint-Étienne, Abbaye aux Hommmes
description: 116 Caen - Le Vieux Saint-Étienne, XVe Siècle
description: Caen - Ancien Hôtel de Valois, XVIe Sièclwe (Hôtel de Bourse)
description: Es handelt sich bei den Aufnahmen um Albuminabzüge
description: 16 Aufnahmen stammen von den Brüdern Neurdein, 3 Aufnahmen sind von einem unbekannten Fotografen
description: Die Aufnahmen sind auf Karton montiert
description: Digitalisierung=Digitization=Numérisation 2024 TIFF
[4 Ansichten von Cannes]
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1870

description: Cannes No 9, La Bocca et le Golfe de l?esterel
description: [Cannes]
description: 1192 Cannes - Vue prise de la Croix-des-Cardes
description: Es handelt sich bei den Aufnahmen um Albuminabzüge
description: Die Aufnahmen sind auf Karton montiert
description: 2 Abzüge stammen vom Verlger W. De Bray, siehe die Stempel auf den Unterlagen
description: Digitalisierung=Digitization=Numérisation 2024 TIFF
Fundamental Study of Silicon Oxynitrides for Photovoltaic Applications
Creators: name: Laades, A.
name: Blech, M.
name: Biank, H.C.
name: Maier, C.
name: Roczen, M.
name: Leschinski, C.
name: Strutzberg, H.
name: Lawerenz, A.
Publisher: name: WIP
Year: 2011
Subjects: Wafer-based Silicon Solar Cells and Materials Technology
Silicon Solar Cell Improvements

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 1653-1658
description: Single layers and stacks based on a-SiOxNy:H were deposited by PECVD and analyzed with respect to
their optical and electronic properties. Spectral ellipsometry (SE), Fourier transform infrared (FTIR) spectroscopy,
secondary ion mass spectroscopy (SIMS) and energy dispersive x-ray analysis (EDX) as well as x-ray photoelectron
spectroscopy (XPS) have been used to monitor the stoichiometry, the optical properties and the behavior of hydrogen
content as a function of the precursor gas flow ratio N2O/SiH4 and the response of these properties to a high temperature
rapid thermal steps. Quasi-steady state photoconductance (QSSPC) decay measurement of effective excess charge carrier
lifetime (eff) served to characterize the passivation quality of n- and p-type CZ silicon wafers, which are used in solar
cells. To analyze the thermal stability, single films and stacks were subjected to different high temperature profiles with
peak temperatures ranging from 850 to 950 °C. As results, single a-SiOxNy:H layers and a-SiOxNy:H/a-SiNy:H stacks
produced in our reactor feature excellent passivation levels as required for a variety of high efficiency solar cells. FTIR
and SIMS results showed good agreement in terms of the behavior of hydrogen upon annealing at high temperatures,
indicating a major role of the hydrogen migration for the passivation quality. A second factor affecting mainly the
thermal stability and structure of the films and stacks is the bond density of the Si-O-Si stretching bond density. Using
EDX and XPS, we could determine the stoichiometry ratio x = [O]/[Si] in the whole composition range from 0 to 2.
Phase transitions of black holes in massive gravity
Creators: name: Fernando, Sharmanthie
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper we have studied thermodynamics of a black hole in massive gravity in the canonical ensemble. The massive gravity theory in consideration here has a massive graviton due to Lorentz symmetry breaking. The black hole studied here has a scalar charge due to the massive graviton and is asymptotically anti-de Sitter. We have computed various thermodynamical quantities such as temperature, specific heat and free energy. Both the local and global stability of the black hole are studied by observing the behavior of the specific heat and the free energy. We have observed that there is a first order phase transition between small and large black hole for a certain range of the scalar charge. This phase transition is similar to the liquid/gas phase transition at constant temperature for a Van der Waals fluid. The coexistence curves for the small and large black hole branches are also discussed in detail.
description: Accepted to be published in Modern Physics Letters A. Three more references added
Two Step Process for Optimized Laser Transferred Contacts
Creators: name: Hoffmann, E.
name: Röder, T.C.
name: Conrad, B.
name: Köhler, J.R.
name: Werner, J.H.
Publisher: name: WIP
Year: 2011
Subjects: Wafer-based Silicon Solar Cells and Materials Technology
Silicon Solar Cell Improvements

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 1640-1643
description: Laser transferred contacts (LTC) offer a high efficiency fine-line front side metallization alternative to
screen printed contacts. A pulsed laser beam transfers nickel from a glass substrate onto a crystalline silicon solar cell
and consequently drives the nickel into the wafer surface by ablating the SiNX anti-reflective coating (ARC) and the
underlying silicon. Simultaneously the electrical contact is established by formation of nickel silicide. We investigate
the transfer process in detail and find that the contact formation between transferred metal and emitter occurs in two
phases: Ni-transfer the ARC and firing of the transferred nickel through the ARC. Separating the process into two
irradiation steps and independent optimization of each of the two steps allows a significant reduction of the silicon
ablation. The improved irradiation process makes an 8 μm wide seed layer possible, which thickens by electroplating
to a width wF = 40 μm and an aspect ratio a = 0.5.
Definition, evaluation and refinement of the SnR CM governance model, V2
Creators: name: Korma, Iliana
name: Besson, Philippe
name: Dumitrascu, Alexandru
name: Nerantzis, Lorenzo
name: Bertram, Svenja
name: Burgos, Marta
name: Schilcher, Birgit
name: Dumitrascu, Alexandru
name: Andriciuc, Radu
name: Horrillo, Cristina
Publisher: name: Zenodo
Year: 2022
Subjects: governance model
evaluation
Search and rescue
Crisis Management

description: The SnR crisis governance model will be linked to existing databases to provide functionality for capturing Risk Assessment (e.g., comparable functions for disaster type, location, radius, impact and threats).
 The component will be based on a library of terms, business rules and methods to support these types of analysis identified and implemented in WP3 (T3.1 and T3.2).
 The content of the library reflects unified community definitions of risk and other parameters utilized to characterize a disaster or crisis event.
 The SnR CM will allow for increased situational awareness and early warning of major disaster incidents with ad-hoc, innovative and dynamic solutions.
 The common operating framework will also support wider training and education activities for emergency responders.
 In fact, the majority of emergency responders are not overtly involved in EU response through the Mechanism but may become either direct beneficiaries of EU aid or have to face event consequences that have already been experienced, a ‘lessons learnt’ programme delivered online.
 The SnR CM concept will allow for a wider definition which includes the capability to (a) collect static and dynamic data on the basis of standards and protocols and (b) all relevant static and dynamic data suppliers that are relevant to various disaster types.
 Nine end users of SnR project have been invited to complete a questionnaire developed for the purposes to identify and register the operational procedures of these end users from 6 EU countries (Greece, Romania, Spain, France, Italy, Austria) that are involved in this project.
 It has to be mentioned that 70 questions were prepared related to these procedures that will be analyzed in the specific section below.
Field Study on Changing Grid Requirements Due to High PV Penetration
Creators: name: Wirth, G.
name: Spring, A.
name: Becker, G.
name: Pardatscher, R.
name: Witzmann, R.
name: Brantl, J.
name: Garhamer, M.
Publisher: name: WIP
Year: 2011
Subjects: PV Systems
Large PV Power Plants and Distributed PV: System Aspects and Grid Connection

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 4215-4218
description: The low voltage grid has to be designed, to handle the maximum occurring load. Decentralized power
production has no impact on the grid as long as this power is locally consumed. Efficient planning of the low voltage
grid demands for indicators of the simultaneity of the feed in and the nominal power of a PV system. The E.ON
Bayern AG project “Netz der Zukunft”, which is a cooperation of the E.ON Bayern AG, the Technische Universität
München and the University of Applied Sciences Munich, analyzes these new load patterns on the grid. A limiting
factor for the maximum power output of the PV system is the inverter design. Considering the weather conditions two
competing Scenarios arise for the maximum feed in power. With clear skies in summer the irradiation reaches values
around 950 W/m² in Southern Germany. The generated power of distributed PV systems shows due to the
homogeneous weather situation a high simultaneity. The high radiation levels come along with high module
temperatures. Cloudy skies lead to reflections, causing increases of the global radiation up to values above the
standard test conditions (STC). These irradiation enhancements meet low cell temperatures. The simultaneity of this
phenomenon is due to the cloud movement lower as the one of clear skies. This paper shows that typical PV systems
only need to be considered in grid calculations with 85 % of their rated STC Power.
Learning from university museums and collections in higher education: University College London (UCL)
Creators: name: Duhs, Rosalind
Publisher: name: International Committee for University Museums and Collections (UMAC)
Year: 2011
Subjects: subject: Pedagogy
subject: Active & experiential learning
subject: Threshold concept
subject: Troublesome knowledge
subject: 060 Organisationen, Museumswissenschaft

description: Object-based learning (OBL), drawing on the rich resources of university museums and collections, offers a way of leaping lightly over knowledge hurdles. At UCL, over 100 course units include OBL, translating into 2,500 instances of students working with the museum collections each year. Learners in higher education (HE) can be confronted with difficult topics which become obstacles to understanding, slowing down their learning. These obstacles often take the form of new concepts which may initially appear counter-intuitive. Misconceptions sometimes have to be unlearnt before such challenging areas can be negotiated. Active student engagement with museum artifacts can facilitate such processes.
Estimating 3D Trajectories from 2D Projections via Disjunctive Factored Four-Way Conditional Restricted Boltzmann Machines
Creators: name: Mocanu, Decebal Constantin
name: Ammar, Haitham Bou
name: Puig, Luis
name: Eaton, Eric
name: Liotta, Antonio
Publisher: name: arXiv
Year: 2016
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Estimation, recognition, and near-future prediction of 3D trajectories based on their two dimensional projections available from one camera source is an exceptionally difficult problem due to uncertainty in the trajectories and environment, high dimensionality of the specific trajectory states, lack of enough labeled data and so on. In this article, we propose a solution to solve this problem based on a novel deep learning model dubbed Disjunctive Factored Four-Way Conditional Restricted Boltzmann Machine (DFFW-CRBM). Our method improves state-of-the-art deep learning techniques for high dimensional time-series modeling by introducing a novel tensor factorization capable of driving forth order Boltzmann machines to considerably lower energy levels, at no computational costs. DFFW-CRBMs are capable of accurately estimating, recognizing, and performing near-future prediction of three-dimensional trajectories from their 2D projections while requiring limited amount of labeled data. We evaluate our method on both simulated and real-world data, showing its effectiveness in predicting and classifying complex ball trajectories and human activities.
description: Pattern Recognition, ISSN 0031-3203, Elsevier, 2017
Simplified Indoor Calibration Method of Solar Irradiance Sensors
Creators: name: Nieto, M.B.
name: Chenlo, F.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Components for PV Systems
PV Modules

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 3456-3458
description: Solar irradiance measurement is one of the tasks which requires high precision in a photovoltaic
installation as it is fundamental to achieve an adequate system control, as much for the determination of the expected
performance as for the functioning of measured data, and then compare this against the actual performance. This
paper presents an advantageous approach for the calibration of solar sensors since it shows an indoor measurement
method, which allows independence from climatic conditions that can restrict the procedures of any type of outdoor
irradiance sensor calibration. The method consists of comparing the measured sensor indoor results against a patron
sensor of equivalent technology which was previously calibrated outdoors.
Influence of the Aluminum in Glass Frits of Front-Side Silver Paste on PV Electrical Properties
Creators: name: Kawamoto, Y.
name: Yoshino, Y.
name: Sugimura, K.
name: Kojima, T.
name: Ohshita, Y.
Publisher: name: WIP
Year: 2011
Subjects: Wafer-based Silicon Solar Cells and Materials Technology
Silicon Solar Cell Improvements

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 1603-1606
description: Al incorporated in glass frits of the front-side Ag paste improves the chemical durability, and thus
improves long-term reliability of solar cells. On the other hand, high Al concentration in glass frits causes increase in
the leakage current, especially for solar cells with the Rapid Thermal Process, and degrades efficiency. To study the
cause of leakage, the leakage spot of Ag-Si interface was analyzed, and abnormally high concentration of Al was
found. From the element analysis by EDX, it was revealed that Al-rich glass phase has been formed, which is
considered to damage PN junction.
Graph reduction techniques and the multiplicity of the Laplacian eigenvalues
Creators: name: Bahmani, Asghar
name: Kiani, Dariush
Publisher: name: arXiv
Year: 2015
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C50

description: Let $M=[m_{ij}]$ be an $n\times m$ real matrix, $ρ$ be a nonzero real number, and $A$ be a symmetric real matrix. We denote by $D(M)$ the $n\times n$ diagonal matrix $diag(\sum_{j=1}^{m}m_{1j},\ldots,\sum_{j=1}^{m}m_{nj})$ and denote by $L_{A}^ρ$ the generalized Laplacian matrix $D(A)-ρA$. A well-known result of Grone et al. states that by connecting one of the end-vertices of $P_{3}$ to an arbitrary vertex of a graph, does not change the multiplicity of Laplacian eigenvalue $1$. We extend this theorem and some other results for a given generalized Laplacian eigenvalue $μ$. Furthermore, we give two proofs for a conjecture by Saito and Woei on the relation between the multiplicity of some Laplacian eigenvalues and pendant paths.
description: 13 pages, 9 figures, two corrected typos in Lemma 20, to appear in Linear Algebra and its Applications
Annealing Effects in LPCVD Grown Zinc Oxide Films
Creators: name: Beyer, W.
name: Hamelmann, F.
name: Knipp, D.
name: Lennartz, D.
name: Prunici, P.
name: Raykov, A.
name: Stiebig, H.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Thin Film Solar Cells
Amorphous and Microcrystalline Silicon Solar Cells

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 3094-3098
description: Vacuum annealing studies of boron-doped zinc oxide films grown by low pressure chemical vapor
deposition (LPCVD) from diethylzinc and H2O vapour are reported. Electrical measurements show, depending
on the substrate temperature of the films, a moderate increase in conductivity and Hall mobility up to annealing
temperatures of about 200-300°C, followed by decreases at higher annealing temperature. Highest conductivity
and mobility values (  ≈ 1000 S/cm and μ ≈ 35 cm2/Vs, respectively) were reached for material deposited at TS =
175°C and annealed at 250°C. Effusion measurements show the release of molecules like H2, H2O and CH4
starting from 200-300°C. Effusion of implanted inert gases helium and neon for structural analysis show that the
microstructure of as-deposited materials depends strongly on TS. For TS =150°C material, migration through
interconnected voids dominates He effusion while for material deposited at higher TS effusion from isolated
voids limits the helium release. After annealing up to 400-500°C, the latter effusion mechanism dominates all
types of investigated LPCVD ZnO material. The results suggest that a low concentration of interconnected voids
and/or a reduction by annealing is a prerequisite for obtaining improved electrical properties.
RISIS Research Seminar: The determinants of European universities patenting and co-patenting with companies
Creators: name: Wolszczak-Derlacz, Joanna
Publisher: name: Zenodo
Year: 2024
Subjects: RISIS ETER database
RISIS Patents
EU universities
co-patenting
companies

description: This study examines the determinants of patenting and co-patenting with companies by European universities. The analysis takes into account more than 400 universities from 17 countries over the period 2011–2018. We test several determinants of the commercial activity of universities such as prior patent activity, age, public or private nature of the institution, students enrolment (size), students per academic staff, non-academic staff per academic staff, publication per academic staff and funds structure. We estimate two-part model with zero-inflated negative binomial regression which estimate separately the impact of the determinant on the probability of patenting (count data) and probability of no patenting (excess zeros).The data comes from RISIS Patents merged with ETER database.

Discussant: Rainer Frietsch, Fraunhofer ISI
Dynamical analysis of interacting dark energy model in the framework of particle creation mechanism
Creators: name: Biswas, Sujay Kr.
name: Khyllep, Wompherdeiki
name: Dutta, Jibitesh
name: Chakraborty, Subenoy
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this work we present the cosmological dynamics of interacting dark energy models in the framework of particle creation mechanism. The particle creation mechanism presented here describes the true non equilibrium thermodynamics of the universe. In spatially flat Friedmann-Lema{\^ı}tre-Robertson-Walker universe considered here, the dissipative bulk viscous pressure is due to the non conservation of particle number. For simplicity, we assume that the creation of perfect fluid particles to be isentropic (adiabatic) and consequently the viscous pressure obeys a linear relationship with particle creation rate. Due to complicated nature of the Einstein's field equations, dynamical systems analysis has been performed to understand deeply about the cosmological dynamics. We have found some interesting cosmological scenarios like late-time evolution of universe dominated by dark energy which could mimic quintessence, cosmological constant or phantom field through a dark matter dominated era. We also obtained a possibility of crossing the phantom divide line which is favored by observations.
description: 19 pages, 10 figures; version accepted for publication in Physical Review D
Monitoring and Evaluation of Economic Impact in the Reduction of Mismatching in a PV Facility Located in North Italy
Creators: name: Perotti, P.
name: Fin, R.
name: Grazia, G.
Publisher: name: WIP
Year: 2011
Subjects: PV Systems
Large PV Power Plants and Distributed PV: System Aspects and Grid Connection

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 4385-4387
description: This paper describes the procedures and the investment for the reduction of mismatching in a PV plant
(815kWp, 4371 PV modules and 42 inverters) in a field. The owner, after installation had begun, had doubts about the
efficiency of the system. Thus it nominated the company Recoplan Srl, an independent engineering firm, to examine and
minimize losses due to mismatching. When we arrived on the field, EPC (Engineering, Procurement and Construction)
had already installed some modules, so we could take action only on about 65% of the modules. In the end we had: 1575
modules (in 75 strings and 15 inverters) which were installed randomly, another 1470 modules (in 70 strings and 14
inverters) which were carefully chosen and the last 1365 modules (in 65 strings and 13 inverters) partially selected
against mismatching. Unfortunately, due to bureaucratic issues, the plant became fully operational only from mid-July
2011, so we just finished testing and calibrating the measurement instruments and data loggers for evaluating the PR
(performance ratio) of each individual inverter.
Intergalactic Lyman continuum photon budget in the past 5 billion years
Creators: name: Gaikwad, Prakash
name: Khaire, Vikram
name: Choudhury, Tirthankar Roy
name: Srianand, Raghunathan
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We constrain the H I photoionization rate $(Γ_{\rm HI})$ at $z \lesssim 0.45$ by comparing the flux probability distribution function and power spectrum of the Ly-$α$ forest data along 82 QSO sightlines obtained using Cosmic Origins Spectrograph with models generated from smoothed particle hydrodynamic simulations. We have developed a module named "Code for Ionization and Temperature Evolution (CITE)" for calculating the intergalactic medium (IGM) temperature evolution from high to low redshifts by post-processing the GADGET-2 simulation outputs. Our method, that produces results consistent with other simulations, is computationally less expensive thus allowing us to explore a large parameter space. It also allows rigorous estimation of the error covariance matrix for various statistical quantities of interest. We find that the best-fit $Γ_{\rm HI}(z)$ increases with $z$ and follows $(4 \pm 0.1) \times 10^{-14}\:(1+z)^{4.99 \pm 0.12}$ s$^{-1}$. At any given $z$ the typical uncertainties $ΔΓ_{\rm HI} / Γ_{\rm HI}$ are $\sim 25$ per cent which contains not only the statistical errors but also those arising from possible degeneracy with the thermal history of the IGM and cosmological parameters and uncertainties in fitting the QSO continuum. These values of $Γ_{\rm HI}$ favour the scenario where only QSOs contribute to the ionizing background at $z<2$. Our derived $3σ$ upper limit on average escape fraction is $0.008$, consistent with measurements of low-$z$ galaxies.
description: 25 pages, 17 figures, 11 tables, Accepted for publication in MNRAS
Surface Characterization of Sputtered ZnO:Al for Silicon Thin-Film Solar Cells
Creators: name: Jost, G.
name: Bunte, E.
name: Worbs, J.
name: Siekmann, H.
name: Hüpkes, J.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Thin Film Solar Cells
Amorphous and Microcrystalline Silicon Solar Cells

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 3078-3082
description: Using a large range of differently deposited ZnO:Al substrates we investigated the correlation between
the as-deposited ZnO:Al surface and the resulting surface topography of ZnO:Al after texture-etching in diluted
hydrochloric acid. SEM images of the unetched surface were employed to characterize different features of the
unetched topography. Based on these findings a new surface classification is suggested. SEM results show that
ZnO:Al samples with similar features before etching also show strong resemblance in their surface topography after
etching. Furthermore we prove that certain features of the unetched surface are optically measurable via haze
measurements and can therefore be used to predict the etch results. Angular resolved scattering measurement and
SEM images of the etched surface are used to evaluate the results of the etching step. Finally, μc-Si solar cells are
assembled on the ZnO:Al films. We show that the short circuit current density of the test cells is correlated to the
angular resolved scattering signal of discrete large angles.
Andreas Klostermaier
Creators: name: Redaktion, Die
Publisher: name: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V.
Year: 2023

description: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V., Bd. 2 (1995): Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V.
Functional Autoregression for Sparsely Sampled Data
Creators: name: Kowal, Daniel R.
name: Matteson, David S.
name: Ruppert, David
Publisher: name: arXiv
Year: 2016
Subjects: subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences

description: We develop a hierarchical Gaussian process model for forecasting and inference of functional time series data. Unlike existing methods, our approach is especially suited for sparsely or irregularly sampled curves and for curves sampled with non-negligible measurement error. The latent process is dynamically modeled as a functional autoregression (FAR) with Gaussian process innovations. We propose a fully nonparametric dynamic functional factor model for the dynamic innovation process, with broader applicability and improved computational efficiency over standard Gaussian process models. We prove finite-sample forecasting and interpolation optimality properties of the proposed model, which remain valid with the Gaussian assumption relaxed. An efficient Gibbs sampling algorithm is developed for estimation, inference, and forecasting, with extensions for FAR(p) models with model averaging over the lag p. Extensive simulations demonstrate substantial improvements in forecasting performance and recovery of the autoregressive surface over competing methods, especially under sparse designs. We apply the proposed methods to forecast nominal and real yield curves using daily U.S. data. Real yields are observed more sparsely than nominal yields, yet the proposed methods are highly competitive in both settings.
Vorschau / Impressum
Creators: name: Redaktion, Die
Publisher: name: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V.
Year: 2023

description: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V., Bd. 2 (1995): Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V.
Towards Cost-Efficient Grid-Connected PV Power Plants in Northern Scandinavia
Creators: name: Good, C.
name: Persson, H.
name: Kleven, O.
name: Norton, M.
name: Boström, T.
Publisher: name: WIP
Year: 2011
Subjects: PV Systems
Large PV Power Plants and Distributed PV: System Aspects and Grid Connection

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 4347-4355
description: Northern Scandinavia has a yearly insolation that is comparable to Central Europe. This is true for both
optimal inclined fixed systems and for two-axis tracking systems. Despite this fact, the installed PV in this region is
only a minor fraction compared to Germany, which is one of the world’s top PV nations. This paper presents a
calculated levelized cost of electricity for Piteå in Northern Sweden on the same level as for Freiburg in Southern
Germany. According to these calculations, the system reaches grid parity even without subsidies. These calculations
were based on simulations performed for different high efficient PV technologies with both fixed mounting and solar
tracking for four locations in Scandinavia and Germany. The results show that the performance of different
technologies is dependent on the system design. Since the module area is limited on the relatively expensive two-axis
tracking systems, the optimum choices in these calculations were high efficient mono-crystalline modules. The work
presented is a part of the installation of a combined commercial and research 20 kWp two-axis tracking system that is
currently being installed in Piteå, Sweden.
Hermann Fürst von Pückler-Muskau
Creators: name: Lohwasser, Angelika
Publisher: name: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V.
Year: 2023

description: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V., Bd. 2 (1995): Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V.
Front and Back Contacts for Microcrystalline Silicon Solar Cells in n-i-p Configuration
Creators: name: Böttler, W.
name: Smirnov, V.
name: Lambertz, A.
name: Hüpkes, J.
name: Finger, F.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Thin Film Solar Cells
Amorphous and Microcrystalline Silicon Solar Cells

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 3060-3063
description: The development of back and front contacts for μc-Si:H thin film solar cells in a n-i-p
configuration is concerned in this work. Two types of back contacts have been used on glass substrates: (i) etched
ZnO layers (with the optimized texture for μc-Si thin film solar cells in p-i-n configuration) and (ii) highly
reflective Ag/ZnO layers, deposited on the textured ZnO. The effects of both types of back contacts on solar cell
performance will be discussed in this paper. Transparent ZnO covered by Ag grids is used as front contact. The
window layers were front ZnO and microcrystalline silicon p-layer, deposited at different trimethylboron (TMB)
concentrations. The effect of front ZnO layer thickness and p-layer doping on cell performance have been
investigated and correlated with electrical and optical properties of these layers, deposited on glass.
Archäologische Expeditionen der Humboldt-Universität
Creators: name: Hintze, Ursula
name: Barsch, Barbara
name: Wenig, Steffen
Publisher: name: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V.
Year: 2023

description: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V., Bd. 2 (1995): Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V.
On the Contributions to the $\bf U_Y(1)$ Chern-Simons Term and the Evolution of Fermionic Asymmetries and Hypermagnetic Fields
Creators: name: Zadeh, S. Rostam
name: Gousheh, S. S.
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study simultaneous evolution of electron, neutrino and quark asymmetries, and large scale hypermagnetic fields in the symmetric phase of the electroweak plasma in the temperature range $100$GeV$\leq T\leq 10$TeV, taking into account the chirality flip processes via inverse Higgs decays and fermion number violation due to Abelian anomalies. We present a derivation of the coefficient of the Chern-Simons term for the hypercharge gauge field, showing that the left-handed and right-handed components of each fermion species contribute with opposite sign. This is in contrast to the results presented in some of the previous works. The $\textrm{U}_{\textrm{Y}}(1)$ Chern-Simons term affects the resulting anomalous magnetohydrodynamic (AMHD) equations. We solve the resulting coupled evolution equations for the lepton and baryon asymmetries, as well as the hypermagnetic field to obtain their time evolution along with their values at the electroweak phase transition ($T_{EW} \sim 100$GeV) for a variety of critical ranges for their initial values at $T=10$TeV. We first investigate the results of this sign change, by directly comparing our results with those obtained in one of the previous works and find that matter asymmetry generation increases considerably in the presence of a strong hypermagnetic field. Furthermore, we find that a strong hypermagnetic field can generate matter asymmetry starting from absolutely zero asymmetry, while matter asymmetry can generate a hypermagnetic field provided the initial value of the latter is nonzero.
description: 29 pages, 4 figures
Reduction of Cell Thickness for Industrial Micromorph Tandem Modules
Creators: name: Knauss, H.
name: Salabas, E.L.
name: Fecioru-Morariu, M.
name: Goldbach, H.D.
name: Hötzel, J.
name: Krull, S.
name: Kluth, O.
name: Kravets, R.
name: Losio, P.A.
name: Reinhardt, J.
name: Sutterlueti, J.
name: Eisenhammer, T.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Thin Film Solar Cells
Amorphous and Microcrystalline Silicon Solar Cells

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 3064-3067
description: For the commercial fabrication of a-Si/μc-Si tandem modules, thin absorber layers are highly desirable since
production cost decreases with layer thickness. Improving the light-management in our modules, in particular by an
improved back-reflector, allowed for a reduction in thickness of top- and bottom-cell. Further, investigating lightdegradation
behavior of different top- and bottom-cell thickness combinations, we find only minor differences in
stabilized power. Realizing that layer thickness can be reduced without significant power loss, the original process
was optimized for thinner absorber layers. After optimizing the production process a large module (A = 1.4 m2) with
thin bottom-cell absorber layer of 1200 nm and a stabilized efficiency of 10% was realized. Modules produced with
industrial scale tools indicate that for commercial application even thinner cell combinations will be favorable.
3D Photonic Crystal Integrated as an Intermediate Reflector in Micromorph Tandem Solar Cells
Creators: name: Beckers, T.
name: Üpping, J.
name: Bielawny, A.
name: Lambertz, A.
name: Stannowski, B.
name: Carius, R.
name: Wehrspohn, R.B.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Thin Film Solar Cells
Amorphous and Microcrystalline Silicon Solar Cells

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 3073-3075
description: Dielectric intermediate reflector layers in thin-film silicon tandem solar cells with randomly textured
interfaces are used to optimize current matching and finally the energy conversion efficiency of the whole device. We
integrated a 3D photonic crystal as an intermediate reflector layer between an amorphous silicon top cell and a
microcrystalline silicon bottom cell. The reflectivity of the 3D photonic thin-film intermediate layer device is
designed and optimized for a state-of-the-art tandem solar cell which leads to an enhancement of the external
quantum efficiency within the amorphous silicon top cell. Our prototype shows an enormous gain of the external
quantum efficiency in the in the weak absorption spectrum of the top cell and nearly no loss for short wavelength.
Weiterführung archäologischer Arbeiten im Sudan – Bericht über die Erkundungskampagne 1993
Creators: name: Wenig, Steffen
Publisher: name: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V.
Year: 2023

description: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V., Bd. 2 (1995): Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V.
Isolating the Lyman Alpha Forest BAO Anomaly
Creators: name: Evslin, Jarah
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: A 2.5-3 sigma discrepancy has been reported between the baryonic acoustic oscillation peak (BAO) in the Lyman $α$ forest at $z\sim 2.34$ and the best fit Planck $Λ$CDM cosmology. To isolate the origin of the tension, we consider unanchored BAO, in which the standard BAO ruler is not calibrated, eliminating any dependence on cosmology before redshift $z\sim 2.34$. We consider BOSS BAO measurements at $z\sim 0.32$, 0.57 and 2.34, using the full 2-dimensional constraints on the angular and line of sight BAO scale, as well as isotropic BAO measurements by 6dF and SDSS at $z\sim 0.106$ and $z\sim 0.15$. We find that the $z>0.43$ data alone is in 2.9 sigma of tension with $Λ$CDM with or without the Planck best fit values of the mass fraction $Ω_m$ and the BAO scale $r_d H_0$, indicating that the tension arises not from the $Λ$CDM parameters but from the dark energy evolution itself at 0.57
description: 25 pages, 19 pdf figures, v3: CMB acoustic scale measurement included
Templos de Musawwarat es Sufra. Una ciudad sagrada de un antiguo imperio africano excavada por la Universidad Humboldt de Berlín/Alemania
Creators: name: Loeben, Christian E.
Publisher: name: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V.
Year: 2023

description: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V., Bd. 2 (1995): Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V.
Progress of a-Si:H /μc-Si:H Tandem Solar Module Production on Substrate Size of 2,60 x 2,20 m2 at Sunfilm
Creators: name: Springer, J.
name: Dittkrist, T.
name: Hrunski, D.
name: Pantförder, J.
name: Bönisch, S.
name: Bergmann, T.
name: Lindner, F.
name: Katzung, A.
name: Rittner, J.
name: Schöne, F.
name: Vouters, M.
name: Hesse, R.
name: Liebschner, T.
name: Stannowski, B.
name: Klemm, U.
name: Brammer, T.
name: Hänel, T.
name: Rech, B.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Thin Film Solar Cells
Amorphous and Microcrystalline Silicon Solar Cells

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 2896-2898
description: Sunfilm is the first producer of thin film silicon tandem junction modules on large substrate size
(2,60x2,20 m2) using Applied Materials AKT PECVD systems. The company is scaling up its production facilities in
Grossroehrdorf to a nominal output capacity of 2x60 MW/year. In April 2009, the final acceptance test (FAT) was
achieved and production 24/7 has started in line 1. IEC product certification was achieved in June 2009. In January
2010 the FAT was achieved in line 2. Currently, Sunfilm is focusing on product development, line stabilization and
cost reduction. The company has recently reached very high module efficiencies and offers a wide range of products.
The line flexibility allows production of additional size formats between 1.4 and 5.7 m2. All Sunfilm products
demonstrate better electrical yield kWh per installed MWp than conventional crystalline Si modules. In this paper the
current status of module development and production at Sunfilm is presented. Special emphasis is given to the oneyear
production and product experience.
Tempel von Musawwarat es Sufra. Berliner Ausgrabungen im Sudan
Creators: name: Wenig, Steffen
Publisher: name: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V.
Year: 2023

description: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V., Bd. 2 (1995): Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V.
Cosmic Acceleration From Matter-Curvature Coupling
Creators: name: Zaregonbadi, Raziyeh
name: Farhoudi, Mehrdad
Publisher: name: arXiv
Year: 2015
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider f(R,T) modified theory of gravity in which, in general, the gravitational Lagrangian is given by an arbitrary function of the Ricci scalar and the trace of the energy-momentum tensor. We indicate that in this type of the theory, the coupling energy-momentum tensor is~not conserved. However, we mainly focus on a particular model that matter is minimally coupled to the geometry in the metric formalism and wherein, its coupling energy--momentum tensor is also conserved. We obtain the corresponding Raychaudhuri dynamical equation that presents the evolution of the kinematic quantities. Then for the chosen model, we derive the behavior of the deceleration parameter, and show that the coupling term can lead to an acceleration phase after the matter dominated phase. On the other hand, the curvature of the universe corresponds with the deviation from parallelism in the geodesic motion. Thus, we also scrutinize the motion of the free test particles on their geodesics, and derive the geodesic deviation equation in this modified theory to study the accelerating universe within the spatially flat FLRW background. Actually, this equation gives the relative accelerations of adjacent particles as a measurable physical quantity, and provides an elegant tool to investigate the timelike and the null structures of spacetime geometries. Then, through the null deviation vector, we find the observer area-distance as a function of the redshift for the chosen model, and compare the results with the corresponding results obtained in the literature.
description: 18 pages, 4 figures
Emitter Optimization of Amorphous-Crystalline Silicon Heterojunction Solar Cells Using the DC Saddle Field PECVD System
Creators: name: Leong, K.
name: Gougam, A.B.
name: Bahardoust, B.
name: Kwong, W.Y.
name: Kosteski, T.
name: Yeghikyan, D.
name: Kherani, N.P.
name: Zukotynski, S.
Publisher: name: WIP
Year: 2011
Subjects: Wafer-based Silicon Solar Cells and Materials Technology
Silicon Solar Cell Characterisation and Modelling

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 1581-1584
description: Hydrogenated amorphous silicon (a-Si:H) layers were deposited by the DC Saddle Field PECVD
system in the tetrode configuration to fabricate high efficiency amorphous-crystalline silicon heterojunction (ACSHJ)
solar cells. The a-Si:H deposition controlling parameters including the chamber pressure, gas phase dopant
concentration, and substrate temperature for the p-type a-Si:H emitter was varied. The passivation quality was
evaluated through minority carrier lifetime measurements. The front metal Cr/Ag stack contact was prepared by
photolithography and the finger spacing was 1 mm for a 2 cm by 2.1 cm cell area. An efficiency of 14.7% was
obtained with a (p)a-Si:H/(n)c-Si/(n)a-Si:H configuration. Adding a passivating intrinsic a-Si:H layer between the
doped a-Si:H layers (for a (p)a-Si:H/(i)a-Si:H/(n)c-Si/(i)a-Si:H/(n)a-Si:H configuration) increased the efficiency to
15.5% with an open circuit voltage of 679 mV.
Influence of Ultra-Short Pulse Laser Ablation of Silicon Nitride Passivation Layers on Electronical Cell Properties
Creators: name: Trusheim, D.
name: Schulz-Ruhtenberg, M.
name: Smeets, M.
name: Das, J.
name: Wieduwilt, J.
Publisher: name: WIP
Year: 2011
Subjects: Wafer-based Silicon Solar Cells and Materials Technology
Silicon Solar Cell Improvements

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 1623-1627
description: Ultra short pulse laser ablation is used to open the SiN passivation layer locally. The influence of
different wavelengths, pulse durations and fluences on the electrical cell properties after ablation is studied.
Furthermore the overlap between pulses and the total ablated area is varied. The experimental approach for the
identification of the laser-induced damage uses standard 6 inch polycrystalline H-cells because of the ease of
characterization. Results of ablation using a wavelength of 532 nm show low impact on cell properties by
femtosecond and nanosecond pulses, but considerably degradation when applying picosecond pulses. Results of
ablation using a wavelength of 355 nm show a very low impact by nanosecond pulses on cell properties and even no
impact applying picosecond pulses.
Nachrichten aus dem Institut für Sudanarchäologie
Creators: name: Wenig, Steffen
Publisher: name: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V.
Year: 2023

description: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V., Bd. 2 (1995): Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V.
Löwentempel von Musawwarat es Sufra – eine Computeranimation mit Folgen
Creators: name: Kirchner, Steffen
Publisher: name: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V.
Year: 2023

description: Der Antike Sudan. Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V., Bd. 2 (1995): Mitteilungen der Sudanarchäologischen Gesellschaft zu Berlin e. V.