cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Edge states as mediators of bypass transition in boundary-layer flows
Creators: name: Khapko, Taras
name: Kreilos, Tobias
name: Schlatter, Philipp
name: Duguet, Yohann
name: Eckhardt, Bruno
name: Henningson, Dan S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The concept of edge state is investigated in the asymptotic suction boundary layer in relation with the receptivity process to noisy perturbations and the nucleation of turbulent spots. Edge tracking is first performed numerically, without imposing any discrete symmetry, in a large computational domain allowing for full spatial localisation of the perturbation velocity. The edge state is a three-dimensional localised structure recurrently characterised by a single low-speed streak that experiences erratic bursts and planar shifts. This recurrent streaky structure is then compared with predecessors of individual spot nucleation events, triggered by non-localised initial noise. The present results suggest a nonlinear picture, rooted in dynamical systems theory, of the nucleation process of turbulent spots in boundary-layer flows, in which the localised edge state play the role of state-space mediator.
Shyness on language (Melnick & Kucker, 2023)
Creators: name: Melnick, Liesl
name: Kucker, Sarah C.
Publisher: name: ASHA journals
Year: 2023
Subjects: classificationCode: 390302
subject: Early childhood education
classificationCode: 470402
subject: Child language acquisition
classificationCode: 390402
subject: Education assessment and evaluation
classificationCode: 520403
subject: Learning, motivation and emotion

description: Purpose: The goal of this study is to examine how shyness affects a child’s per[1]formance on language assessments that vary in sociability. We hypothesized that accuracy on language tasks would be driven by shyness such that shyer children would perform better on nonsociable tasks compared to sociable tasks.Method: The procedures followed a quasi-experimental design. One hundred twenty-two participants, ages 17–42 months and varying in their temperament, each underwent a series of three language tasks. The order of tasks was randomized, and each task varied in the social interaction required: a looking task, a pointing task, and a production task. Data were collected via Zoom, and parents reported their child’s shyness level via the Early Child Behavior Questionnaire.Results: Shyness was compared with participants’ accuracy across the three tests while controlling for age and vocabulary percentile. There were significant differences in children’s performance across the tasks, with respect to shyness. Shyer children performed worse on the production task compared to less shy children. All children did well on the pointing task regardless of shyness level, but performance was more nuanced on the looking task such that shyer children were at times more accurate but also less likely to respond in general.Conclusions: As shown by these results, shyer and less shy children respond differentially to methods of language assessment that vary in sociability. It is important for clinicians to acknowledge shyness when choosing an appropriate assessment of children’s language. Future direction includes assessing performance on standardized assessment.Supplemental Material S1. Influence of shyness on language assessment.Melnick, L., & Kucker, S. C. (2023). The Influence of Shyness on Language Assessment. Journal of Speech, Language, and Hearing Research, 66(9), 3588–3605. https://doi.org/10.1044/2023_JSLHR-22-00362
Optical Properties of Silicon Nanodots in SiC Matrix
Creators: name: Summonte, C.
name: Desalvo, A.
name: Canino, M.
name: Allegrezza, M.
name: Rosa, M.
name: Ferri, M.
name: Centurioni, E.
name: Terrasi, A.
name: Mirabella, S.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Advanced Photovoltaics: New Concepts and Ultra-high Efficiency
New Materials, Cells and Modules

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 662-666
description: We present our results on plasma deposited Si-SiC. The optical properties of the silicon rich SiC
matrix as a function of stoichiometry are reported. The results are then used as starting values for the simulation of
the annealed material. The optical simulation correctly predicts the initial silicon nanoparticles precipitation upon
low temperature annealing. For higher annealing temperatures of 900°C and higher, we observe separate
crystallization of the Si and SiC phases. The phase composition is determined by making use of optical simulation.
The crystallized Si results to be well simulated using the optical function of unstructured c-Si. The excess
absorption of the crystallized SiC matrix is evidenced and determined.
Shyness on language (Melnick & Kucker, 2023)
Creators: name: Melnick, Liesl
name: Kucker, Sarah C.
Publisher: name: ASHA journals
Year: 2023
Subjects: classificationCode: 390302
subject: Early childhood education
classificationCode: 470402
subject: Child language acquisition
classificationCode: 390402
subject: Education assessment and evaluation
classificationCode: 520403
subject: Learning, motivation and emotion

description: Purpose: The goal of this study is to examine how shyness affects a child’s per[1]formance on language assessments that vary in sociability. We hypothesized that accuracy on language tasks would be driven by shyness such that shyer children would perform better on nonsociable tasks compared to sociable tasks.Method: The procedures followed a quasi-experimental design. One hundred twenty-two participants, ages 17–42 months and varying in their temperament, each underwent a series of three language tasks. The order of tasks was randomized, and each task varied in the social interaction required: a looking task, a pointing task, and a production task. Data were collected via Zoom, and parents reported their child’s shyness level via the Early Child Behavior Questionnaire.Results: Shyness was compared with participants’ accuracy across the three tests while controlling for age and vocabulary percentile. There were significant differences in children’s performance across the tasks, with respect to shyness. Shyer children performed worse on the production task compared to less shy children. All children did well on the pointing task regardless of shyness level, but performance was more nuanced on the looking task such that shyer children were at times more accurate but also less likely to respond in general.Conclusions: As shown by these results, shyer and less shy children respond differentially to methods of language assessment that vary in sociability. It is important for clinicians to acknowledge shyness when choosing an appropriate assessment of children’s language. Future direction includes assessing performance on standardized assessment.Supplemental Material S1. Influence of shyness on language assessment.Melnick, L., & Kucker, S. C. (2023). The Influence of Shyness on Language Assessment. Journal of Speech, Language, and Hearing Research. Advance online publication. https://doi.org/10.1044/2023_JSLHR-22-00362
Modular Platform for Advanced Photovoltaic Inverter Control Strategies
Creators: name: Monreal Tolmo, J.
name: Subiela, S.
name: Benítez Sánchez, I.
name: Enrique, J.
name: Jordán, D.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Components for PV Systems
Balance of System Components

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 4511-4515
description: A modular hardware platform for a 20 kW three phase inverter has been designed and built to
implement and test multiple control systems for power generation through photovoltaic panels. The platform is built
to provide multiple sensing inputs and a configurable waveform generation for which two DSP working in parallel
are arranged to perform real-time processing of monitored signals and control tasks. The platform implements its own
alarm system ensuring that it can remain in a safe state of disconnection to avoid damages. Since all the hardware
related with the generation is controlled by the DSP modules and as a result of the sensing hardware implemented,
multiple theoretical calculated control algorithms can be programmed and checked and different regulation strategies
and topologies implemented. This allows the inverter performance to be tested both for grid power injection
applications and island mode operation. Different digital and discretized current control techniques have been
designed and tested on the hardware platform. Furthermore, different issues related with enhancing the performance
of the inverter have been considered.
Doped Silicon Nitride as Intermediate Reflector in Micromorph Tandem Solar Cells
Creators: name: Delli Veneri, P.
name: Mercaldo, L.V.
name: Usatii, I.
name: Ciani, P.
name: Privato, C.
Publisher: name: WIP-Munich
Year: 2008
Subjects: Thin Films
Amorphous and Microcrystalline Silicon

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 2343-2346
description: Intermediate reflectors in stacked solar cells are used to increase the photocurrent of the top cell. In
particular, in micromorph tandems they help to improve the stability allowing to keep thin the top amorphous-silicon
intrinsic layer and still reach the proper current matching. In this paper we propose the use of n-doped silicon nitride
as reflector. For production processes such material has the advantage of being compatible with the Plasma Enhanced
Chemical Vapour Deposition (PECVD) solar cell growth. Non-stoichiometric silicon nitride has been fabricated by
PECVD at low temperature (150°C) using silane, ammonia and hydrogen. By varying the ammonia to silane flow
ratio the film stoichiometry is changed and different values of refractive index can be obtained. Phosphine has been
used as dopant gas to increase the electrical conductivity of the layers. Material with low refractive index (compared
to amorphous silicon) and high transparency have been realized, which permit to reflect the low wavelength range of
light, competing to the top cell, while being transparent to the light required by the bottom cell. Preliminary results
on the feasibility of this layer as intermediate reflector in micromorph devices are reported.
Η χρήση του υποβρυχίου ως πολεμικού μέσου διεξαγωγής αποτελεσματικού οικονομικού πολέμου. Μελέτη περίπτωσης της ναυτικής στρατηγικής της Γερμανίας, Μ. Βρετανίας και Ηνωμένων Πολιτειών της περιόδου 1910 – 1945
Creators: name: Παπαφίλης, Πέτρος Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2024
Subjects: Υποβρύχιο
Οικονομικός Πόλεμος
Ναυτική Στρατηγική
Submarine
Economic Warfare
Naval Strategy

description: Σκοπός της διπλωματικής ήταν η συγκριτική μελέτη περίπτωσης της χρήσης του υποβρυχίου ως αποτελεσματικού μέσου διεξαγωγής οικονομικού πολέμου κατά την διάρκεια των δύο παγκοσμίων πολέμων. Εξετάστηκε συνοπτικά η ιστορική εξέλιξη του υποβρυχίου ως πολεμικού συστήματος. Εν συνεχεία παρουσιάστηκαν μια σειρά από βασικές έννοιες όπως η ναυτική ισχύς, η στρατηγική, η θαλάσσια ισχύς, οι επιχειρήσεις θαλάσσιας άρνησης και ο οικονομικός πόλεμος. Παρατέθηκαν οι κυρίαρχες ναυτικές στρατηγικές των εμπολέμων στις δύο συρράξεις . Στη συνέχεια εκτέθηκαν και αναλύθηκαν σε διακριτά κεφάλαια η χρήση του υποβρυχίου και το τακτικό πλαίσιο αξιοποίησής του από τους εμπολέμους κατά την διάρκεια του Πρώτου Παγκοσμίου Πολέμου, κατά την περίοδο του Μεσοπολέμου και τέλος κατά τον Δεύτερο Παγκόσμιο Πόλεμο. Ιδιαίτερη μνεία έγινε στις επιπτώσεις της δράσης του υποβρυχίου στις διάφορες διαστάσεις της πολεμικής προσπάθειας των εμπολέμων, με έμφαση σε οικονομικά, παραγωγικά και αμιγώς στρατιωτικά δεδομένα. Στο τελευταίο κεφάλαιο παρατέθηκαν τα διάφορα συμπεράσματα επί των συγκεκριμένων ερευνητικών ζητημάτων.
description: The purpose of this thesis was the comparative case study of the use of the submarine as an effective means of conducting economic warfare during the two world wars. The historical development of the submarine as a war system was briefly examined. Subsequently, a number of basic concepts such as naval power, strategy, sea power, maritime denial operations and economic warfare were presented. The dominant naval strategies of the belligerents in the two conflicts were listed. Furthermore, the use of the submarine and the tactical framework of its use by the belligerents during the First World War, during the interwar period and finally during the Second World War were presented and analyzed in separate chapters. Special reference was made to the impact of the submarine's action on the various dimensions of the war effort of the belligerents, with emphasis on economic, productive and purely military data.The last chapter sets out the various conclusions on these research issues.
In-Situ Cleaning for High Efficiency Silicon Heterojunction Solar Cells
Creators: name: Salomon, A.
name: Labrune, M.
name: Damon-Lacoste, J.
name: Moreno, M.
name: Roca I Cabarrocas, P.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Advanced Photovoltaics: New Concepts and Ultra-high Efficiency
New Materials, Cells and Modules

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 671-674
description: We have studied and fabricated heterojunctions (HJ) solar cells using a dry, low temperature (200°C),
in-situ cleaning process for SiO2 native oxide removal by a SiF4-H2 plasma on N type, Float Zone (FZ), 3Ohm/cm c-
Si wafers. In a standard RF PECVD reactor (13,56MHz) we have experimented different plasma parameters to find
process conditions giving good surface passivation of the c-Si substrate. We have performed Photo Conductance
Decay measurements to determine the excess carrier lifetime associated to the tested conditions. Lifetimes over 1ms
were obtained with a maximum of 2ms. We have also fabricated 5x5cm2 HJ solar cells with an entirely dry plasma
process by incorporating this plasma cleaning step. The manufactured samples were characterized by PCD, spectral
response and I-V measurements. The best cell had a Voc of 700mV, fill factor of 70,3%, Jsc of 31mA/cm2 for a total
efficiency of 15,3%.
A new Bayesian regression model for counts in medicine
Creators: name: Haselimashhadi, Hamed
name: Vinciotti, Veronica
name: Yu, Keming
Publisher: name: arXiv
Year: 2016
Subjects: subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences

description: Discrete data are collected in many application areas and are often characterised by highly skewed and power-lawlike distributions. An example of this, which is considered in this paper, is the number of visits to a specialist, often taken as a measure of demand in healthcare. A discrete Weibull regression model was recently proposed for regression problems with a discrete response and it was shown to possess two important features: the ability to capture over and under-dispersion simultaneously and a closed-form analytical expression of the quantiles of the conditional distribution. In this paper, we propose the first Bayesian implementation of a discrete Weibull regression model. The implementation considers a novel parameterization, where both parameters of the discrete Weibull distribution can be made dependent on the predictors. In addition, prior distributions can be imposed that encourage parameter shrinkage and that lead to variable selection. As with Bayesian procedures, the full posterior distribution of the parameters is returned, from which credible intervals can be readily calculated. A simulation study and the analysis of four real datasets of medical records show promises for the wide applicability of this approach to the analysis of count data. The method is implemented in the R package BDWreg.
Complete Documentation of PV Mounting Systems with the Help of Building Standards
Creators: name: Herfurth, D.
name: Schnitzer, S.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Components for PV Systems
Balance of System Components

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 4394-4397
description: When considering the acquisition costs for a PV system, the module sub installation plays the smallest
role. The mounting system makes up 5 – 10 % of system value, and after mounting is usually almost invisible.
Consequently, the costs for the system are usually a necessary evil in overall calculation, where economies tend to be
made. For system operators, the efficiency and reliability of a system during the service life in particular are of the
greatest importance. However, no module can be permanently and safely attached without a mounting system.
As damage from the effects of strong wind and heavy snow have resulted in increasing damage in recent years, the
statics design of a PV system has become increasingly important to building owners, system operators and insurance
companies.
Careful documentation of the design provides all parties concerned with the certainty that the influencing factors
occurring on site were taken into consideration during planning of the substructure. As a result, the risk is reduced that
damage which is actually foreseeable (e.g. excessive loads on the PV system as a result of heavy snowfalls in south
Germany) does not occur. This is because in principle, damage whose occurrence is foreseeable is not covered by
insurance.
The documentation of the design of the module substructure is intended to answer the following questions
understandably and in a structured manner:
What mounting system is used?
What standards and regulations were taken into consideration?
What are the local circumstances and what influencing factors (e.g. wind and snow loads) occur?
What assumptions were made during planning?
The mounting systems requirements and the standards to be complied with in the structural analysis are dealt with below.
New Physics at 1 TeV?
Creators: name: Godunov, S. I.
name: Rozanov, A. N.
name: Vysotsky, M. I.
name: Zhemchugov, E. V.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: If decays of a heavy particle S are responsible for the diphoton excess with invariant mass 750 GeV observed at the 13 TeV LHC run, it can be easily accomodated in the Standard Model. Two scenarios are considered: production in gluon fusion through a loop of heavy isosinglet quark(s) and production in photon fusion through a loop of heavy isosinglet leptons. In the second case many heavy leptons are needed or/and they should have large electric charges in order to reproduce experimental data on $σ(pp \to SX) \cdot \mathrm{Br}(S \to γγ)$.
description: 7 pages, 4 figures, 1 table
Cable-Based Solar Wings Tracking System: Two-Axis System and Progress of One-Axis System
Creators: name: Baumgartner, F.P.
name: Büchel, A.
name: Bartholet, R.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Components for PV Systems
Balance of System Components

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 4487-4490
description: Tracking PV modules towards the sun offers gain in yield of 15% to over 35% relative to fixed
mounted PV installations. To reduce material costs and to offering the double use of land, the Solar Wings tracking
system was developed using cables to serve as mounting platform and to use cables to move the module toward the
suns position. Up to know a prototype of a one-axis System was installed in Dec 2009 and the prototype of the twoaxis
system started operation in 2010. The excellent track record of the one-axis Solar Wings installation is proofen
by a overall system performance ratio of 92.3% in the complete first year of operation and 91.7% since the beginning
of 2010 till this date of report in August 2010. Without any interruption of operation the annual yield of
1308 kWh/kW could be reached for that site in southern Germany. The gain of 23% due to one-axis Solar Wings
tracking was measured by comparison the yearly the readings of a tracked irradiance sensor and a fixed mounted
sensor run by the Fraunhofer ISE lab. In 2010 a two axis Solar Wings tracking system was installed and also operates
without any shot down. In 2011 a one-axis Solar Wings tracking system will be installed on top of a small ski-lift in
Switzerland.
Fabrication of surface nanoscale axial photonics (SNAP) structures with a femtosecond laser
Creators: name: Shen, Fangcheng
name: Shu, Xuewen
name: Zhang, Lin
name: Sumetsky, M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Surface nanoscale axial photonics (SNAP) structures are fabricated with a femtosecond laser for the first time. The inscriptions introduced by the laser pressurize the fiber and cause its nanoscale effective radius variation. We demonstrate the subangstrom precise fabrication of individual and coupled SNAP microresonators having the effective radius variation of several nanometers. Our results pave the way to a novel ultraprecise SNAP fabrication technology based on the femtosecond laser inscription.
description: 4 pages
Diagonalization and Many-Body Localization for a Disordered Quantum Spin Chain
Creators: name: Imbrie, John Z
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mathematical Physics (math-ph)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Spectral Theory (math.SP)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 82D30, 60K35, 82B44, 82D30

description: We consider a weakly interacting quantum spin chain with random local interactions. We prove that many-body localization follows from a physically reasonable assumption that limits the extent of level attraction in the statistics of eigenvalues. In a KAM-style construction, a sequence of local unitary transformations is used to diagonalize the Hamiltonian by deforming the initial tensor product basis into a complete set of exact many-body eigenfunctions.
description: 5 pages, 1 figure. To appear in Phys. Rev. Lett
Deposition of Sputtered SiNx:H Passivation Layers Using Hydrogen Plasma Etching for Silicon Surface Preparation
Creators: name: Hegr, O.
name: Bousek, J.
name: Sobota, J.
name: Fort, T.
name: Barinka, R.
name: Poruba, A.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Wafer-based Silicon Solar Cells and Materials Technology
Mono- and Multicrystalline Silicon Materials and Cells

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 1495-1498
description: This work deals with alternative method for mono-crystalline surface cleaning and activation by means
of low pressure plasma-hydrogen etching. The gas mixture of Ar/H2 is used for etch process. Hydrogen plasma
etching can removes native oxide layer very efficiently and also it facilitates high-quality passivation effect due to
the silicon surface hydrogenation. A reactive SiNx:H sputtering process follows after the plasma-hydrogen etching
process using the Ar/N2/H2 gas mixture. Both etching and sputtering are performed in one vacuum cycle. The aim of
such processing is in elimination of SiOX interlayer formation that could be created on the substrate can lead to
formation of very thin SiOxNy layer on the silicon/layer interface after start of SiNx deposition. The Fourier infrared
spectroscopy (FTIR) was used for binding ratio analisis within SiNx:H layers. The influence of plasma-hydrogen
etching on the minority carrier lifetime was measured by MW-PCD method.
Coherent perfect absorption in deeply subwavelength films in the single photon regime
Creators: name: Roger, Thomas
name: Vezzosi, Stefano
name: Bolduc, Eliot
name: Valente, Joao
name: Heitz, Julius J. F.
name: Jeffers, John
name: Soci, Cesare
name: Leach, Jonathan
name: Couteau, Christophe
name: Zheludev, Nikolay
name: Faccio, Daniele
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The technologies of heating, photovoltaics, water photocatalysis and artificial photosynthesis depend on the absorption of light and novel approaches such as coherent absorption from a standing wave promise total dissipation of energy. Extending the control of absorption down to very low light levels and eventually to the single photon regime is of great interest yet remains largely unexplored. Here we demonstrate the coherent absorption of single photons in a deeply sub-wavelength 50% absorber. We show that while absorption of photons from a travelling wave is probabilistic, standing wave absorption can be observed deterministically, with nearly unitary probability of coupling a photon into a mode of the material, e.g. a localised plasmon when this is a metamaterial excited at the plasmon resonance. These results bring a better understanding of the coherent absorption process, which is of central importance for light harvesting, detection, sensing and photonic data processing applications.
description: 13 pages, 5 figures, Published in Nature Communications: 10.1038/ncomms8031
Environmentally Friendly Conductor Materials for Silicon Photovoltaic Cells
Creators: name: Merchant, N.
name: Yang, Y.
name: McKinley, C.
name: Kerp, H.
name: Van Eijk, P.
name: Shaikh, A.
name: Graddy, E.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Wafer-based Silicon Solar Cells and Materials Technology
Mono- and Multicrystalline Silicon Materials and Cells

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 1506-1509
description: Solar energy generation offers an environmentally friendly way to provide power for human needs.
Manufacture of solar cells often involves use of conductive pastes containing Cd, Pb and/or phthalates that are listed on
the REACH Substances of Very High Concern (SVHC). This work was undertaken to demonstrate that front silver, back
silver and back aluminum pastes can be manufactured that are environmentally friendly and enable silicon solar cells of
high efficiency to be made by volume production methods. A variety of Pb-, Cd- and phthalate-free pastes were
formulated and tested as front Ag, back Ag and Al BSF metallization of solar cells. The electrical and morphological
properties of the cells were characterized using IV analysis, contact resistance and SEM microscopy studies. While the
performance of Pb-free Al pastes is known to be equivalent or better than leaded products for years, we also found that
the electrical data of newly developed environmentally friendly Ag pastes is as good as leaded pastes. The paper also
contains a comprehensive study of the effect of paste and emitter types on the performance of solar cells.
Al-Doped ZnO Films Deposited on Flexible Substrates by RF Sputtering for Thin Film Solar Cells
Creators: name: Fernández, S.
name: Martínez-Steele, A.
name: Gandía, J.J.
name: Naranjo, F.B.
Publisher: name: WIP-Munich
Year: 2008
Subjects: Thin Films
Amorphous and Microcrystalline Silicon

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 2347-2351
description: Transparent conducting aluminium-doped zinc oxide (ZnO:Al) films have been prepared on polyethylene terephthalate (PET) and Corning 7059 substrates by radio-frequency (RF) magnetron sputtering at low temperature (100 ºC).
In this work, the optimization of the sputtering parameters such as RF power and working pressure was performed in order to achieve films with both low resistivity values and high average transmittance in the visible wavelength. The XRD measurements revealed that all the obtained films were polycrystalline with a preferred orientation with the c-axis perpendicular to the substrate. Besides, regardless the substrate, the ZnO:Al films were increasingly dark gray coloured as the RF power increased, resulting in a loss of transmittance. These metallic surfaces were obtained at lower RF power values on the polymer substrate in comparison with the glass substrate. High quality films on PET with resistivities as low as 1.1 x 10-3 Ω-cm and average transmittance around 80 % were obtained by suitable controlling the sputtering parameters, 75 W and 1.5 mTorr. On the other hand, it was found that the best films on glass substrate with a resistivity low as 6.2 x 10-4 Ω-cm and an average transmittance around 85 % at the visible wavelength range were obtained at 125 W and 1.5 mTorr. These obtained results showed that the structural, optical and electrical quality of the samples deposited on polymer substrates was similar than those on glass substrates. This would suggest that high quality ZnO:Al films can be obtained on polymer substrates, opening a new field of low cost, light weight, small volume, flexible and unbreakable large area photovoltaic devices.
Modeling of Horizontal Pore Channeling During High Temperature Annealing of Porous Silicon With Initial Vertical Columnar Macropores
Creators: name: Ghannam, M.Y.
name: Hassan, M.M.
name: Depauw, V.
name: Beaucarne, G.
name: Poortmans, J.
name: Mertens, R.
Publisher: name: WIP-Munich
Year: 2008
Subjects: Thin Films
Thin Film Crystalline Silicon

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 2205-2208
description: Horizontal channeling between neighboring pores in porous silicon during high temperature annealing is successfully modeled. The finite element solution of the force balance equation governing the change in the material morphology during high temperature annealing is carried out in the transient mode for the different stages of the annealing process. It is shown that during the temperature ramp up stage the as-formed columnar pores change to quasi-spherical bubbles as a result of the competition between the thermal stress and the initial residual stress. The resulting stress during this stage is dominated by the horizontal component, leading to horizontal channeling between neighboring pores. The channels form during subsequent constant temperature annealing stage with the absence of any thermal stress, and are separated by thin vertical silicon straps. Finally, during temperature ramp down, the thermal stress and the residual stress act together helping the pores to grow. During this stage the straps may break and thin silicon films can be liberated.
The Influence of the Orientation Axis Number on the Efficiency of a Pseudo-Equatorial Tracker in Brasov - Romania
Creators: name: Burduhos, B.
name: Visa, I.
name: Diaconescu, D.
name: Saulescu, R.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Components for PV Systems
Balance of System Components

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 4491-4496
description: The main goal of this paper is to determine the beam (direct) solar radiation tracking efficiency of
different types of tracking systems, derived from the pseudo-equatorial ones, for specific geographical and
meteorological conditions, in the particular location of Braov, Romania. As a first step, the incident beam radiation
was modeled for the specific location then the best suitable bi-axial and mono-axial tracking systems were chosen for
which the tracking efficiencies were determined. The results presented in this paper are mainly relevant to the local
community when installing photovoltaic systems becomes a local priority and might be of use when it is necessary to
choose between bi-axial, mono-axial or fixed tracking systems at a specific geographical site.
An Investigation of LCOE with Respect to Key PV System Design Ratios
Creators: name: Seymour, E.
name: Robinson, K.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Components for PV Systems
Balance of System Components

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 4502-4505
description: The cost of energy derived from a photovoltaic (PV) installation is a function of system cost and
operational characteristics. Derivation of exact relationships for energy cost amid considerable design complexity can
be a significant challenge. This paper examines relative changes in energy cost from PV systems as a function of key
ratios. While these ratios are known to PV system designers, their significance to eventual output energy cost is not
often recognized. The two ratios examined here are the installed PDC/PAC ratio and the VOC/VMP ratio. Optimization, or
at least improvement, of these two ratios leads to relative reduction of energy cost by at least several percent.
From vertex detectors to inner trackers with CMOS pixel sensors
Creators: name: Besson, A.
name: Pérez, A. Pérez
name: Spiriti, E.
name: Baudot, J.
name: Claus, G.
name: Goffe, M.
name: Winter, M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The use of CMOS Pixel Sensors (CPS) for high resolution and low material vertex detectors has been validated with the 2014 and 2015 physics runs of the STAR-PXL detector at RHIC/BNL. This opens the door to the use of CPS for inner tracking devices, with 10-100 times larger sensitive area, which require therefore a sensor design privileging power saving, response uniformity and robustness. The 350 nm CMOS technology used for the STAR-PXL sensors was considered as too poorly suited to upcoming applications like the upgraded ALICE Inner Tracking System (ITS), which requires sensors with one order of magnitude improvement on readout speed and improved radiation tolerance. This triggered the exploration of a deeper sub-micron CMOS technology, Tower-Jazz 180 nm, for the design of a CPS well adapted for the new ALICE-ITS running conditions. This paper reports the R&D results for the conception of a CPS well adapted for the ALICE-ITS.
description: 4 pages, 4 figures, VCI 2016 conference proceedings
Calibrated Photoluminescence Measurements of the Upconverter NaYF4:20% Er3+ for Silicon Solar Cells
Creators: name: Fischer, S.
name: Goldschmidt, J.C.
name: Krämer, K.W.
name: Biner, D.
name: Hermle, M.
name: Glunz, S.W.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Advanced Photovoltaics: New Concepts and Ultra-high Efficiency
New Materials, Cells and Modules

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 657-661
description: Upconversion (UC) of subband-gap photons is promising to enhance solar cell efficiency. We explore the
properties of -NaYF4:20% Er3+ for this application. This material shows efficient UC suitable for semiconductor based
solar cells with band gaps up to 1.25 eV. In this work we investigate the optical UC efficiency by calibrated
photoluminescence measurements. The values were obtained in dependence of the excitation wavelength as well as the
irradiance. The highest optical UC quantum efficiency of 4.3% was obtained for monochromatic irradiance of 1390 Wm-
2 at 1523 nm. Because these data from optical measurements do not account for any losses associated with the
application of the upconverter to a solar cell, they represent the upper limit of energy conversion for an optimized solar
cell UC device.
Photovoltaic-Based Backup-Systems: A Solution for TT Grounding Requirements
Creators: name: Kreutzer, N.
name: Allert, C.
name: Weide, J.
name: Rothert, M.
name: Thim, F.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Components for PV Systems
Balance of System Components

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 4479-4482
description: Backup-systems are used in various locations where a power cut may cause damage, in some cases even
resulting in financial losses. These systems are mainly powered by diesel engines or batteries. Due to the increasing
number of grid connected photovoltaic-systems in the build environment, it makes economically sense to use this
available renewable energy source also when a power cut occurs. The way a backup-system is integrated into the
electrical installation depends, among other criteria, on the local grounding system of the grid (TN, TT or IT grounding
system) and hence the grounding of the neutral during a power cut. Purpose of this study is to describe the development
of a PV-based backup-system which may be integrated without an immense technical and bureaucratic effort into TT
grounding systems.
Pronoun interpretation in adults with IDD (Hawthorne & Loveall, 2023)
Creators: name: Hawthorne, Kara
name: Loveall, Susan J.
Publisher: name: ASHA journals
Year: 2023
Subjects: classificationCode: 520405
subject: Psycholinguistics (incl. speech production and comprehension)
classificationCode: 470101
subject: Communication studies

description: Purpose: Pronouns are referentially ambiguous: For example, “she” could refer to any female. Nonetheless, errors in pronoun interpretation rarely occur for adults with typical development (TD) due to several strategies implicitly shared between the talker and listener. The purpose of this study was to test the impacts of syntactic, semantic, and prosodic prominence on pronoun interpretation for adults with intellectual and developmental disabilities (IDD) and TD.Method: Adults with IDD (n = 28) and TD (n = 27) listened to ministories involving a pronoun with two potential antecedents that varied in syntactic, semantic, and pragmatic prominence. Subject/first-mentioned antecedents are more syntactically prominent than object antecedents. Semantic prominence was manipulated via verb transitivity: Subjects are more semantically prominent when the verb is highly transitive (e.g., “hit” vs. “see,” a low-transitivity verb for which the subject is merely experiencing the action). Pragmatic prominence was manipulated by placing prosodic focus on one of the two potential antecedents. Eye gaze to images representing the potential antecedents was tracked as a measure of online processing. Responses to a follow-up pronoun interpretation question were also recorded.Results: Adults with TD used syntactic, semantic, and—in early processing—pragmatic prominence when interpreting ambiguous pronouns. Adults with IDD were sensitive to syntactic prominence but to a significantly lesser extent than their peers with TD.Conclusions: Pronouns are an integral part of everyday conversation, and when the conversational partners do not share common strategies to link ambiguous pronouns with their antecedents, misunderstandings will occur. Results show that adults with IDD only weakly share pronoun interpretation strategies with adults with TD, suggesting that pronouns may be an important focus for intervention for this population.Supplemental Material S1. Statistical results.Hawthorne, K., & Loveall, S. J. (2023). The effects of syntactic, semantic, and pragmatic prominence on pronoun interpretation in adults with intellectual and developmental disabilities. Journal of Speech, Language, and Hearing Research. Advance online publication. https://doi.org/10.1044/2023_JSLHR-22-00557
Advances in Electroless Nickel Plating for the Metallization of Silicon Solar Cells Using Different Structuring Techniques for the ARC
Creators: name: Alemán, M.
name: Bay, N.
name: Barucha, D.
name: Knorz, A.
name: Biro, D.
name: Preu, R.
name: Glunz, S.W.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Wafer-based Silicon Solar Cells and Materials Technology
Mono- and Multicrystalline Silicon Materials and Cells

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 1414-1418
description: This paper presents the results of a seed and plate technology, based on electroless nickel plating on industrial
substrates. Through the photoassisted surface activation of the cells homogeneous NiP coatings, about 30-50 nm thick have
been deposited. The combination of this step with inkjet masking and etching has been compared with laser ablation and
with standard screen printed cells on industrial solar cells. An improvement of 0.5% absolute in efficiency has been achieved
thanks to the use of nickel contacts. The advantages and disadvantages of each structuring process are introduced. The
evaluation of the laser ablation + nickel process on high efficiency structures has delivered FF over 80%.
Soziokulturelle Animatorinnen und Animatoren: Lokale Bezugspersonen für gesellschaftliches Handeln
Creators: name: El-Maawi, Rahel (Autor/in)
name: Stade, Peter (Autor/in)
Publisher: name: Zenodo
Year: 2015
Subjects: Soziokultur
Soziokulturelle Animation
Symposium
Tagung

description: Keine Beschreibung.
description: + ID der Publikation: hslu_34142 + Art des Beitrages: Fachmedien + Sprache: Deutsch + Letzte Aktualisierung: 2016-11-16 14:02:54
Overview on Crystalline Silicon Solar Cells Using PECVD Rear Passivation and Laser-Fired Contacts
Creators: name: Hofmann, M.
name: Saint-Cast, P.
name: Suwito, D.
name: Seiffe, J.
name: Schmidt, C.
name: Kambor, S.
name: Gautero, L.
name: Kohn, N.
name: Nekarda, J.-F.
name: Leimenstoll, A.
name: Wagenmann, D.
name: Erath, D.
name: Catoir, J.
name: Wolke, W.
name: Janz, S.
name: Biro, D.
name: Grohe, A.
name: Rentsch, J.
name: Glunz, S.W.
name: Preu, R.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Wafer-based Silicon Solar Cells and Materials Technology
Mono- and Multicrystalline Silicon Materials and Cells

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 1517-1522
description: Solar cells of "classic" external contact structure with front and rear contacts applying a passivated and
locally contacted rear are presented in this paper. A variety of rear surface passivation schemes deposited by PECVD
are discussed and compared using illuminated I-V, reflection and internal quantum efficiency measurements with
fixed and variable bias light intensities. All cells presented were contacted on the rear by laser-firing. It is shown that
amorphous hydrogenated silicon (a-Si) stacked with amorphous hydrogenated silicon oxide (SiOx) is reaching a
comparable level of rear surface passivation as thermally grown silicon dioxide (SiO2) and that the bias-light
dependence of such cells is lower than that of SiO2 or amorphous hydrogenated silicon nitride (SiNx) stacked with
SiOx passivated cells. Additionally, firing stable stacks of SiOx, SiNx and SiOx are compared to SiCx and the above
mentioned layer systems.
Labor Soziokultur
Creators: name: Beer, Charles
name: Dietsche, Anna
name: El-Maawi, Rahel
name: Hangartner, Gabi
name: Lehni, Faust
name: Peter, Colette
name: Schneider, Ramona
name: Smith, Janet L.
name: Stade, Peter
name: Wandeler, Bernard
Publisher: name: Zenodo
Year: 2015

description: Von den tiefgreifenden gesellschaftlichen Veränderungen ist auch die Soziokulturelle Animation betroffen. So sind im Laufe der letzten Jahre zahlreiche neue soziokulturelle Handlungsfelder und Handlungsräume entstanden. Dies war der Grund für das Symposium „Labor Soziokultur“, das im November 2014 in Luzern stattfand. Rund 200 Teilnehmende aus verschiedenen Bereichen tüftelten, experimentierten und diskutierten zwei Tage lang zum Thema Soziokultur. Das Werkstattheft bietet einen Überblick über Referate sowie diverse Beiträge des Symposiums.
Design of a Functional Rare Earth Oxide Up-Conversion Layer for Bulk Silicon Cells
Creators: name: Clark, A.
name: Williams, D.
name: Arkun, E.
name: Smith, R.
name: Semans, S.
name: Jamora, A.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Advanced Photovoltaics: New Concepts and Ultra-high Efficiency
New Materials, Cells and Modules

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 675-677
description: In this work the conventional SiOx used on the back of c-Si solar cells has been replaced by a epitaxially grown crystalline layer of rare earth oxide. Materials optimization has previously resulted in bulk oxide layers exhibiting the expected upconversion photoluminescence – similar PL results have now been obtained from part processed cells. The oxide epitaxy was undertaken after completion of the front AR coat. Since the Si can also be grown epitaxially there was an opportunity to also explore engineering of the back surface field material, both in doping and composition. Cell testing confirmed that these modifications had been successfully implemented in a c-Si cell.
Effects linguistic content on voice cue perception (Koelewijn et al., 2023)
Creators: name: Koelewijn, Thomas
name: Gaudrain, Etienne
name: Shehab, Thawab
name: Treczoks, Tobias
name: Başkent, Deniz
Publisher: name: ASHA journals
Year: 2023
Subjects: classificationCode: 420102
subject: Audiology
classificationCode: 460302
subject: Audio processing
classificationCode: 460212
subject: Speech recognition

description: Purpose: For voice perception, two voice cues, the fundamental frequency (fo) and/or vocal tract length (VTL), seem to largely contribute to identification of voices and speaker characteristics. Acoustic content related to these voice cues is altered in cochlear implant transmitted speech, rendering voice perception difficult for the implant user. In everyday listening, there could be some facilitation from top–down compensatory mechanisms such as from use of linguistic content. Recently, we have shown a lexical content benefit on just-noticeable differences (JNDs) in VTL perception, which was not affected by vocoding. Whether this observed benefit relates to lexicality or phonemic content and whether additional sentence information can affect voice cue perception as well were investigated in this study.Method: This study examined lexical benefit on VTL perception, by comparing words, time-reversed words, and nonwords, to investigate the contribution of lexical (words vs. nonwords) or phonetic (nonwords vs. reversed words) information. In addition, we investigated the effect of amount of speech (auditory) information on fo and VTL voice cue perception, by comparing words to sentences. In both experiments, nonvocoded and vocoded auditory stimuli were presented.Results: The outcomes showed a replication of the detrimental effect reversed words have on VTL perception. Smaller JNDs were shown for stimuli containing lexical and/or phonemic information. Experiment 2 showed a benefit in processing full sentences compared to single words in both fo and VTL perception. In both experiments, there was an effect of vocoding, which only interacted with sentence information for fo.Conclusions: In addition to previous findings suggesting a lexical benefit, the current results show, more specifically, that lexical and phonemic information improves VTL perception. fo and VTL perception benefits from more sentence information compared to words. These results indicate that cochlear implant users may be able to partially compensate for voice cue perception difficulties by relying on the linguistic content and rich acoustic cues of everyday speech.Koelewijn, T., Gaudrain, E., Shehab, T., Treczoks, T., & Başkent, D. (2023). The role of word content, sentence information, and vocoding for voice cue perception. Journal of Speech, Language, and Hearing Research, 66(9), 3665–3676. https://doi.org/10.1044/2023_JSLHR-22-00491