cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Screen-Printing Process on 20 Micron Thick Epitaxial UMG Multicrystalline-Si Solar Cells (Efficiencies up to 14.5 %)
Creators: name: Récaman Payo, M.
name: De Vecchi, S.
name: Norton, M.
name: Sivaramakrishnan Radhakrishnan, H.
name: Van Nieuwenhuysen, K.
name: Kuzma-Filipek, I.
name: Van Hoeymissen, J.
name: Dross, F.
name: Poortmans, J.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Thin Film Solar Cells
Thin Film Crystalline Silicon Solar Cells and Wafer Equivalents

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 3646-3650
description: Epitaxial silicon thin-film solar cell technology, consisting of a thin high-quality epitaxial stack on top of a
non-active highly-doped low-cost silicon substrate, is a promising alternative for cost-effective industrial solar cell
manufacturing. In the scope of this technology, this work demonstrates efficiency improvement of an industrial process
based on screen-printing for epitaxial solar cells on up-graded metallurgical grade multicrystalline silicon (UMG-Si)
substrates. The cell concept under investigation consists of a 20 μm thick active device, including the p+-type back
surface field (BSF), the p-type base and the n-type front-side emitter, grown by chemical vapor deposition (CVD). Lighttrapping
is improved by plasma texturing of the front surface in combination with an internal porous silicon reflector
positioned at the epitaxial/substrate interface. We report on the most recent improvements of several attractive features in
these devices (the epitaxial BSF, the epitaxial emitter and the plasma texturing on epitaxial emitters) as well as their
effect on the solar cell performance and process. So far, cell efficiencies up to 14.5 % have been achieved.
On a possible large width 750 GeV diphoton resonance at ATLAS and CMS
Creators: name: Aloni, Daniel
name: Blum, Kfir
name: Dery, Avital
name: Efrati, Aielet
name: Nir, Yosef
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The ATLAS and CMS experiments at the LHC have reported an excess of diphoton events with invariant mass around 750 GeV, with local significance of about $3.6 σ$ and $2.6 σ$, respectively. We entertain the possibility that this excess is due to new physics, in which case the data suggest a new particle with 13 TeV LHC production cross section times diphoton branching ratio of about 5~fb. Interestingly, ATLAS reports a mild preference for a sizeable width for the signal of about 45 GeV; this result appears consistent with CMS, and is further supported by improving the compatibility of the 8 TeV and 13 TeV analyses. We focus on the possibility that the new state is a scalar. First, we show that, in addition to the new state that is needed directly to produce the diphoton bump, yet more new particles beyond the Standard Model are needed to induce diphoton decay rate of the right size. Second, we note that if the excess is attributed to the Breit-Wigner peak of a single new state, then the signal strength and width -- taken together -- suggest a total LHC production cross section of order $10^5$ fb. Restricting to perturbative models without ad-hoc introduction of many new states or exotic charges, we reach the following conclusions: (i) Gluon-fusion cannot explain the required large production cross section. (ii) Tree level production from initial state quarks cannot explain the required branching ratio to two photons. (iii) Tree level production is constrained by flavor data as well as LHC Run-I and Tevatron dijet analyses. Insisting on a large width we are led to suggest that more than one scalar states, nearly degenerate in mass, could conspire to produce an observed wide bump.
description: v2: A discussion concerning the flavor constraints in the U(2) symmetry limit added. Contours in Fig. 1 modified. Conclusions left unchanged v3: Journal published version. A discussion concerning the interference in $t\bar t$ searches is added
Global Effective-Field-Theory analysis of New-Physics effects in (semi)leptonic kaon decays
Creators: name: González-Alonso, Martín
name: Camalich, Jorge Martin
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We analyze the decays $K\toπ\ellν$ and $P\to\ellν$ ($P=K,π$, $\ell=e,\,μ$) using a low-energy Effective-Field-Theory approach to parametrize New Physics and study the complementarity with baryon $β$ decays. We then provide a road map for a global analysis of the experimental data, with all the Wilson coefficients simultaneously, and perform a fit leading to numerical bounds for them and for $V_{us}$. A prominent result of our analysis is a reinterpretation of the well-known $V_{ud}-V_{us}$ diagram as a strong constraint on new physics. Finally, we reinterpret our bounds in terms of the $SU(2)_L\times~U(1)_Y$-invariant operators, provide bounds to the corresponding Wilson coefficients at the TeV scale and compare our results with collider searches at the LHC.
description: 45 pages, 4 figures; v2: minor changes to match version published in JHEP
Supplementary Materials: Automated Feedback for Participants of Hands-on Cybersecurity Training
Creators: name: Švábenský, Valdemar
name: Vykopal, Jan
name: Čeleda, Pavel
name: Dovjak, Ján
Publisher: name: Zenodo
Year: 2023
Subjects: cybersecurity education
interactive learning environments
hands-on training
virtual labs
shell commands

description: This repository contains supplementary materials for the following journal paper: Valdemar Švábenský, Jan Vykopal, Pavel Čeleda, Ján Dovjak.
 Automated Feedback for Participants of Hands-on Cybersecurity Training.
 In Springer Education and Information Technologies. 2023. How to cite If you use or build upon the materials, please use the BibTeX entry below to cite the original paper (not only this web link). @article{Svabensky2023automated, author = {\v{S}v\'{a}bensk\'{y}, Valdemar and Vykopal, Jan and \v{C}eleda, Pavel and Dovjak, J\'{a}n}, title = {{Automated Feedback for Participants of Hands-on Cybersecurity Training}}, journal = {Education and Information Technologies}, publisher = {Springer}, volume = {}, year = {2023}, issn = {1360-2357}, url = {}, doi = {}, } Attached content See the README.md file in the attached ZIP archive.
description: Funded by the European Union under Grant Agreement No. 101087529. Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union or European Research Executive Agency. Neither the European Union nor the granting authority can be held responsible for them.
Spectral shift and dephasing of electromagnetically induced transparency in an interacting Rydberg gas
Creators: name: Han, Jingshan
name: Vogt, Thibault
name: Li, Wenhui
Publisher: name: arXiv
Year: 2016
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We perform spectroscopic measurements of electromagnetically induced transparency (EIT) in a strongly interacting Rydberg gas, and observe a significant spectral shift of the transparency from the single-atom EIT resonance as well as a spectral dephasing of the same order. We characterize the shift and dephasing as a function of atomic density, probe Rabi frequency, and principal quantum number of Rydberg states, and demonstrate that the observed spectral shift and dephasing are reduced if the size of a Gaussian atomic cloud is increased. We simulate our experiment with a semi-analytical model, which gives results in good agreement with our experimental data.
description: 6 pages, 5 figures
Suitable Process Maturity Model for PV Thin Film Production
Creators: name: Konrad, K.
name: Gerhardt, P.
name: Wertz, R.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Thin Film Solar Cells
Manufacturing Issues and Processing

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 3657-3660
description: Maturity can be used to describe technologies, products or processes between development and their
full, reliable and optimized usage. Maturing can generally be defined as a process from chaos to order. It also implies
an increase of capability, reliability and quality.
To assess maturity, various models have been developed. Those models provide a systematic framework for carrying
out benchmarking and assessing performance improvement. In general, they have several different levels of maturity
which are in a sequential staged order. Requirements are assigned to each maturity level that have to be fulfilled to
reach the corresponding level. The models differ widely in their viewpoint and focus. The following chapters will
summarize the most important maturity models today. It is distinguished between organizational maturity, which
focuses on business processes and technical maturity, which focuses on technical (manufacturing) processes. Finally
an approach is outlined how a possible maturity model for Photovoltaic can be established and used in a very
practical manor.
Potential overtreatment in end-of-life care in adults 65 years or older dying from cancer: applying quality indicators on nationwide registries
Creators: name: Szilcz, Máté
name: Wastesson, Jonas W.
name: Morin, Lucas
name: Calderón-Larrañaga, Amaia
name: Lambe, Mats
name: Johnell, Kristina
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Pharmacology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Science Policy
subject: Hematology

description: Quality indicators are frequently used to measure the quality of care at the end of life. Whether quality indicators of potential overtreatment (i.e., when the risks outweigh the benefits) at the end of life can be reliably applied to routinely collected data remains uncertain. This study aimed to identify quality indicators of overtreatment at the end of life in the published literature and to investigate their tentative prevalence among older adults dying with solid cancer. Retrospective cohort study of decedents including all older adults (≥65 years) who died with solid cancer between 1 January 2013 and 31 December 2015 (n = 54,177) in Sweden. Individual data from the National Cause of Death Register were linked with data from the Total Population Register, the National Patient Register, and the Swedish Prescribed Drug Register. Quality indicators were applied for the last one and three months of life. From a total of 145 quality indicators of overtreatment identified in the literature, 82 (57%) were potentially operationalisable with routine administrative and healthcare data in Sweden. Unidentifiable procedures and hospital drug treatments were the reason for non-operationalisability in 52% of the excluded indicators. Among the 82 operationalisable indicators, 67 measured overlapping concepts. Based on the remaining 15 unique indicators, we tentatively estimated that overall, about one-third of decedents received at least one treatment or procedure indicative of ‘potential overtreatment’ during their last month of life. Almost half of the published overtreatment indicators could not be measured in routine administrative and healthcare data in Sweden due to a lack of means to capture the care procedure. Our tentative estimates suggest that potential overtreatment might affect one-third of cancer decedents near death. However, quality indicators of potential overtreatment for specific use in routinely collected data should be developed and validated.
Ruling Out Static Latent Homophily in Citation Networks
Creators: name: Wittek, Peter
name: Darányi, Sándor
name: Nelhans, Gustaf
Publisher: name: arXiv
Year: 2016
Subjects: subject: Digital Libraries (cs.DL)
subject: FOS: Computer and information sciences

description: Citation and coauthor networks offer an insight into the dynamics of scientific progress. We can also view them as representations of a causal structure, a logical process captured in a graph. From a causal perspective, we can ask questions such as whether authors form groups primarily due to their prior shared interest, or if their favourite topics are 'contagious' and spread through co-authorship. Such networks have been widely studied by the artificial intelligence community, and recently a connection has been made to nonlocal correlations produced by entangled particles in quantum physics -- the impact of latent hidden variables can be analyzed by the same algebraic geometric methodology that relies on a sequence of semidefinite programming (SDP) relaxations. Following this trail, we treat our sample coauthor network as a causal graph and, using SDP relaxations, rule out latent homophily as a manifestation of prior shared interest leading to the observed patternedness. By introducing algebraic geometry to citation studies, we add a new tool to existing methods for the analysis of content-related social influences.
description: 14 pages, 1 figure, computational details are available at https://github.com/peterwittek/ipython-notebooks/blob/master/Citation_Network_SDP.ipynb. in Scientometrics, 2016
Innovating Photovoltaic Module Assembly Structure and Interconnection
Creators: name: Hsieh, H.-H.
name: Lee, W.-K.
name: Chang, T.-C.
name: Hsi, C.-S.
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; 2184-2188
description: This paper presents the performance of rear side solar modules of 5 inch crystalline solar cells by an innovating
assembly structure with epoxy-based electrical conductive adhesive (ECA). The innovating module assembly
structure for back contact solar module is proved to successfully prevent the shunting failure when back contact solar
cells interconnect. According to the comparison between the innovating module structure and as-laminated back
contact solar module, it is revealed that power loss for the innovating module structure and as-laminated solar cell
module package structures in a series connection were 1.57%, and 5.33%, respectively. The solar module by
innovating assembly should reduce cell power loss by about 70.5%. On the other hand, fill factor (FF) reduction of
the innovating assembly module and the as-laminated solar cell module package structures were about 0.46% and
3.52%, respectively. Compared to the as-laminated solar cell module package structures, the innovating assembly
module remained high shunt resistance (Rsh) and smaller series resistance (Rs), thereby reducing FF loss during
packaging processes. The comparison results illustrated the innovating assembly module structure should
significantly improve the package loss of the rear side cells in a series connection.
Comprehensive Theory for Reorganization of Macropores in Crystalline Silicon Upon High Temperature Processing
Creators: name: Ghannam, M.Y.
name: Alomar, A.S.
name: Poortmans, J.
name: Mertens, R.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Thin Film Solar Cells
Thin Film Crystalline Silicon Solar Cells and Wafer Equivalents

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 3615-3618
description: A physical interpretation is proposed for the sequence of transformations that macropores embedded in
crystalline silicon undergo during high temperature treatments. First, cylindrical pores spheroidize by
surface diffusion at constant volume. In the presence of stress and due to perturbation in the spherical
symmetry stored elastic energy competes with cavity surface energy transforming the shape of the cavity
by surface diffusion into an oblate shape. A critical fracture criterion is defined that relates the pore radius,
the stress and the mechanical constants of the material. When the fracture condition is met, cavity collapses
catastrophically into an ultrathin uniform slit that splits thin crystalline films off the original substrate.
On a triply periodic polyhedral surface whose vertices are Weierstrass points
Creators: name: Lee, Dami
Publisher: name: arXiv
Year: 2015
Subjects: subject: Differential Geometry (math.DG)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: In this paper, we will construct an example of a closed Riemann surface $X$ that can be realized as a quotient of a triply periodic polyhedral surface $Π\subset \mathbb{R}^3$ where the Weierstrass points of $X$ coincide with the vertices of $Π.$ First we construct $Π$ by attaching Platonic solids in a periodic manner and consider the surface of this solid. Due to periodicity we can find a compact quotient of this surface, which has genus $g = 3.$ We claim that the resulting surface is not hyperelliptic and also that it is regular. By regular, we mean that the automorphism group of $X$ is transitive on flags. The symmetries of $X$ allow us to construct hyperbolic structures and various translation structures on $X$ that are compatible with its conformal type. The translation structures are the geometric representations of the holomorphic 1-forms of $X,$ which allow us to identify the Weierstrass points.
Characterization of Intrinsic Hydrogenated Amorphous Si1-xOx Layers for High Efficiency Heterojunction Si Solar Cells
Creators: name: Yamaguchi, Y.
name: Watahiki, T.
name: Konagai, M.
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; 2138-2140
description: Intrinsic hydrogenated amorphous Si1-xOx (i-a-Si1-xOx:H ) layers show good passivation properties
because a formation of defective epitaxial layers is suppressed at the interface of amorphous silicon / crystalline
silicon even at a high temperature exceeding 200°C. Hence, the improvement of open-circuit voltage is expected
using the i-a-Si1-xOx:H layers as the surface passivation layers of n-type Si heterojunction solar cells. In this research,
the effects of the CO2/SiH4 ratio, the substrate temperature, and the annealing on the passivation properties are
investigated by means of a minority carrier lifetime measurement and Fourier-transform infrared (FTIR) spectroscopy.
To obtain the high quality i-a-Si1-xOx:H layers, the substrate temperature should be high enough because the defective
Si-H2 bonds are less. Furthermore, the passivation quality as well as the layer quality improves so much by the
combination of introducing H2 dilution and annealing even at a low temperature.
Nonlinear single Compton scattering of an electron wave-packet
Creators: name: Angioi, A.
name: Mackenroth, F.
name: Di Piazza, A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Nonlinear single Compton scattering has been thoroughly investigated in the literature under the assumption that initially the electron has a definite momentum. Here, we study a more general initial state, and consider the electron as a wave-packet. In particular, we investigate the energy spectrum of the emitted radiation and show that in typical experimental situations some features of the spectra shown in previous works are almost completely washed out. Moreover, we show that at comparable relative uncertainties, the one in the momentum of the incoming electron has a larger impact on the photon spectra at a fixed observation direction than the one on the laser frequency.
description: 24 pages, 12 figures
Convergence criteria for FI$_\mathcal{W}$-algebras and polynomial statistics on maximal tori in type B/C
Creators: name: Rolland, Rita Jimenez
name: Wilson, Jennifer C. H.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Combinatorics (math.CO)
subject: Algebraic Geometry (math.AG)
subject: Algebraic Topology (math.AT)
subject: Group Theory (math.GR)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: A result of Lehrer describes a beautiful relationship between topological and combinatorial data on certain families of varieties with actions of finite reflection groups. His formula relates the cohomology of complex varieties to point counts on associated varieties over finite fields. Church, Ellenberg, and Farb use their representation stability results on the cohomology of flag manifolds, together with classical results on the cohomology rings, to prove asymptotic stability for "polynomial" statistics on associated varieties over finite fields. In this paper we investigate the underlying algebraic structure of these families' cohomology rings that makes the formulas convergent. We prove that asymptotic stability holds in general for subquotients of FI$_\mathcal{W}$-algebras finitely generated in degree at most one, a result that is in a sense sharp. As a consequence, we obtain convergence results for polynomial statistics on the set of maximal tori in $\mathrm{Sp}_{2n}(\overline{F_q})$ and $\mathrm{SO}_{2n+1}(\overline{F_q})$ that are invariant under the Frobenius morphism. Our results also give a new proof of the stability theorem for invariant maximal tori in $\mathrm{GL}_n(\overline{F_q})$ due to Church-Ellenberg-Farb.
description: Corrected an error in Proposition 4.13 found by Jason Fulman. Final version; 33 pages
Amtliche Mitteilungen der Technischen Universität Dortmund Nr. 25/2022
Creators: name: (:Unkn) Unknown
Publisher: name: Technische Universität Dortmund
Year: 2022
Subjects: subject: 080

description: Gleichstellungskonzept (2022 bis 2026) der Fakultät Raumplanung
description: Gleichstellungskonzept (2022 bis 2026) der Fakultät Architektur und Bauingenieurwesen
description: Gleichstellungskonzept (2022 bis 2026) der Fakultät Wirtschaftswissenschaften
description: Gleichstellungskonzept (2022 bis 2026) der Fakultät Erziehungswissenschaft, Psychologie und Bildungsforschung
description: Gleichstellungskonzept (2022 bis 2026) der Fakultät Rehabilitationswissenschaften
description: Gleichstellungskonzept (2022 bis 2026) der Fakultät Humanwissenschaften und Theologie
description: Gleichstellungskonzept (2022 bis 2026) der Fakultät Kulturwissenschaften
description: Gleichstellungskonzept (2022 bis 2026) der Fakultät Kunst- und Sportwissenschaften
description: Gleichstellungskonzept (2022 bis 2026) der Fakultät Sozialwissenschaften
description: Amtliche Mitteilungen der Technischen Universität Dortmund;2022; 25
Uniform bounds for Black--Scholes implied volatility
Creators: name: Tehranchi, Michael R.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Mathematical Finance (q-fin.MF)
subject: FOS: Economics and business
subject: 91G20, 91B25, 41A60

description: In this note, Black--Scholes implied volatility is expressed in terms of various optimisation problems. From these representations, upper and lower bounds are derived which hold uniformly across moneyness and call price. Various symmetries of the Black--Scholes formula are exploited to derive new bounds from old. These bounds are used to reprove asymptotic formulae for implied volatility at extreme strikes and/or maturities.
Identifizierung und Charakterisierung von differentiell exprimierten Genen aus CAL 51 Brustkrebszellen und Revertantenzellen nach Transfer von Chromosom 17
Creators: name: Janke, Jürgen
Publisher: name: Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I
Year: 1998
Subjects: subject: 570 Biowissenschaften, Biologie
subject: 32 Biologie
subject: WG 3700
subject: XH 1800

description: Der Transfer von Chromosom 17 in die menschliche Mammakarzinomzellinie CAL 51 hatte zu einer Reversion des malignen Phänotyps geführt. Aufbauend auf diese Versuche wurde die Genexpression von CAL 51 Zellen versus CAL 17/5 Revertantenzellen mit der "differential display" Methode ana lysiert. Mit dem "differential display" Verfahren konnten 177 differentielle RT-PCR Produkte identifiziert, ausgeschnitten, eluiert und reamplifiziert werden. Ein Vergleich der Sequenzen mit den internationalen Datenbanken ergab: 46% der untersuchten PCR Produkte wiesen keine Homologie zu bekannten Genen auf, 16% zeigten eine hohe Homologie zu EST Sequenzen und cDNA Klonen (unbekannter Gene), 19% eine hohe Homologie zu mitochondrialer DNA und 19% wiesen eine hohe Homologie zu bekannten Genen auf. Die Northern Analyse von 40 ausgewählten Reamplifikaten bestätigte die differentielle Expression in etwa 1/3 der Fälle. Die homologen Gene sind auf unterschiedlichen Chromosomen lokalisiert. Für einige konnte aufgrund ihrer bekannten biologischen Funktionen eine Assoziation mit der Reversion von CAL 51 Zellen vermutet werden. Dazu gehörten u.a. Apolipoprotein J, Sp17 und Profilin. Das Profilingen zeigte eine deutlich erhöhte mRNA- und Proteinexpression in den Revertantenzellen und ist auf Chromosom 17 in der transfizierten Region p13.3 lokalisiert. Profilin ist ein ubiquitäres Protein, das Bindungsstellen für G-Aktin, PIP2 und poly L-Proline besitzt. Die Transfektion von CAL 51 Zellen mit klonierter Profilin cDNA führte bei drei ausgewählten Transfektanten zu einer Suppression des neoplastischen Phänotyps. Die Profilin cDNA Transfektanten zeigten gegenüber den parentalen CAL 51 Zellen und einer Vektortransfektante (ohne Profilin cDNA Insert) ein verlangsamtes Wachstum, eine geringere Koloniebildung in Weichagar, eine differenzierte Strukturbil dung in Matrigel und eine reduzierte Tumorigenität in "nude" Mäusen. Die beobachteten Veränderungen korrelierten zumeist mit der Profilinexpression in den Transfektanten. Eine SSCP- und Sequenzanalyse des Profilingens in CAL 51 Zellen ergab drei Sequenzunterschiede gegenüber der "wildtyp" DNA: Ein homozygoter Basenaustausch in der Promoterregion (A-773G), ein homozygoter Basenaustausch in Exon 3 (C334T) (ohne Aminosäureaustausch) sowie eine heterozygote Deletion in der untranslatierten 3' Region (645delT). Die Bedeutung dieser Sequenzunterschiede ist noch unklar. Mit ersten Northern Analysen von Tumor- und Normalgeweben sowie mehreren Brustkrebszellinien wurde begonnen. Die kleine Anzahl der untersuchten Proben erlaubt noch keine Interpretation der Ergebnisse.
Analysis and Fabrication of Test Structures for Thin Solar Cells Based on Epitaxial Absorbers
Creators: name: Murcia, C.P.
name: Hao, R.
name: Lochtefeld, A.
name: Kerestes, C.
name: Creazzo, T.
name: Wang, L.
name: Shreve, K.
name: Curtin, M.
name: Gerger, A.
name: Leitz, C.
name: Barnett, A.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Thin Film Solar Cells
Thin Film Crystalline Silicon Solar Cells and Wafer Equivalents

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 3610-3614
description: The high performance potential of thin silicon (Si) solar cells is based on high voltage.  The open circuit voltage (Voc) potential for thin Si solar cells has not been reached.  Voc is highly dependent on surface recombination and bulk lifetime.  Our approach utilizes a simple planar solar cell design with no light trapping structures to independently optimize critical material parameters towards high Voc.  We report Voc above 630mV and efficiencies above 14% for these planar solar cells with no front texture and no back reflector.  To contribute to the design space in thin silicon solar cells, we analyze critical parameters such as surface recombination and bulk lifetime through the solar cell fabrication process.  The design of basic structures to measure the limits to Voc is a valuable diagnostic tool for the fabrication of high performance thin silicon solar cells.  In solar cells with epitaxial absorbers, these two parameters are difficult to test.  This work reports device results that exhibit a path to high performance in thin silicon solar cells.
Nickel hyperaccumulation, elemental profiles and agromining potential of three species of Odontarrhena from the ultramafics of Western Iran
Creators: name: Ghafoori, Mohammad
name: Shariati, Mansour
name: van der Ent, Antony
name: Baker, Alan J. M.
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biophysics
subject: Biochemistry
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified

description: The profiles of trace and major elements in three Odontarrhena species from the ultramafics of Western Iran (O. callichroa, O. penjwinensis and O. inflata) were evaluated to provide detailed information on their soil-plant relationships and potentials for agromining. The mean concentrations of Ni in leaf dry matter of these three species were 877, 3,270 and 2,720 mg kg−1, respectively. The mean concentrations of total soil Ni at sites Mazi Ban, Kamyaran and Ghala Ga were 1,470, 2,480, 1,030 mg kg−1, respectively. The Bioconcentration Factor (BCF) for Ni was >1 in O. penjwinensis and O. inflata, but not in O. callichroa. A positive relationship between shoot Ni and soil pH was found for all three species. They display Ni hyperaccumulation in the leaves, but with pronounced variation in the Ni concentrations attained. Odontarrhena penjwinensis emerged as the most promising potential candidate for future Ni agromining. The progress made in this study will enable further consideration of the three Odontarrhena species, especially O. penjwinensis, for any future commercial Ni agromining of the serpentinic ultramafic soils in Western Iran. This pioneering study in a remote part of Western Iran is the first to evaluate nickel hyperaccumulating species of Odontarrhena (Alyssum) in relation to their soil-plant relationships and potential for agromining.
Light induced enhancement of superconductivity via melting of competing bond-density wave order in underdoped cuprates
Creators: name: Patel, Aavishkar A.
name: Eberlein, Andreas
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We develop a theory for light-induced superconductivity in underdoped cuprates in which the competing bond-density wave order is suppressed by driving phonons with light. Close to a bond-density wave instability in a system with a small Fermi surface, such as a fractionalized Fermi liquid, we show that the coupling of electrons to phonons is strongly enhanced at the bond-density wave ordering wavevectors, leading to a strong softening of phonons at these wavevectors. For a model of classical phonons with anharmonic couplings, we show that the combination of strong softening and driving can lead to large phonon oscillations. When coupled to a phenomenological model describing the competition between bond-density wave order and superconductivity, these phonon oscillations melt bond-density wave order, thereby enhancing pairing correlations.
description: 26 pages in preprint format, 9 figures, accepted version
Influence of Technological Operation on PV Parameters of Edge-Illuminated Epitaxial Silicon Solar Cells
Creators: name: Sarnecki, J.
name: Gawlik, G.
name: Teodorczyk, M.
name: Kozlowski, R.
name: Jeremiasz, O.
name: Krzyzak, K.
name: Skwarcz, J.
name: Lipinski, D.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Thin Film Solar Cells
Thin Film Crystalline Silicon Solar Cells and Wafer Equivalents

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 3630-3632
description: The main goal of presented work is to state how the technological processes used to fabrication of
edge–illuminated solar cells (EISC) affects cells parameters. The edge-illuminated PV cell is designed to
cooperate with a luminescent solar concentrator (LSC). The unit cells in a shape of narrow strip were performed
according to our concept from silicon epitaxial structures with p-n junction. The measurements of PV parameters
of strips fabricated in the same technological conditions from silicon wafers with different multi-layers epitaxial
structures allowed us to select the most suitable epitaxial structures for EISC application. The sequence of layers
n+/n/p and p+/p/n deposited on highly doped p+ and n+ substrates has been chosen. PV stripe structures has been
manufactured by thinning of Si wafer with epi-layers up to about 100 μm and next mechanical or laser cutting to
final form of 40-80 mm long and 2 – 4 mm wide stripes. The Ni/Al contacts were deposited after thinning
process. The effect of technological processing such as cutting process, chemical edge finishing and
antireflection coating has been investigated. It was found that main affect on the PV cell parameters has chemical
treatment of the edge surface, what indicates the important role of surface phenomena on the examined PV cells.
title: Shearographic Detection of Internal Defects in Austenitic Stainless Steels
Creators: name: Kryukov, Igor
name: Prints, Eugen
name: Sommer, Niklas
name: Böhm, Stefan
Publisher: name: Universität Kassel
Year: 2022
Subjects: subject: nondestructive testing
subject: shearography
subject: austenitic stainless steel
subject: induction
subject: corrosion
subject: 600
subject: 620
subject: Edelstahl
subject: Korrosion
subject: Induktion
subject: Shearing-Interferometrie

description: Gefördert durch den Publikationsfonds der Universität Kassel
Encircling the Muses: the multi-disciplinary heritage of university museums
Creators: name: Murphy, Bernice L.
Publisher: name: International Committee for University Museums and Collections (UMAC)
Year: 2003
Subjects: subject: 060 Organisationen, Museumswissenschaft

description: University museums have a rich history, having played a crucial role in the development of collections and museums. Some of the most important museum collections today are to be found within or attached to a university. However, university museums also have identity, resource and audience issues to address, that - if not resolved positively - can restrict their influence and lead to frustrations of unfulfilled potential professionally. They may feel divided, under-resourced, and be insufficiently contributing to new museological developments beyond the university setting, in the larger world of museums located visibly in the public sphere. On the other hand, university museums may be confined even within their own campus location, and be insufficiently reaching out to their multiple communities close at hand. It is to be hoped that the new International Committee of ICOM - ICOM-UMAC - can assist in analysing these issues and stimulate university museums to make an expansive contribution both to their own academic communities and to museum developments generally.
description: Os museus universitârios possuem urn longo e fecundo passado, tendo desempenhado uni pape! crucial na evoluçào dos museus e das colecçôes em geral. Na realidade, algumas das mais importantes colecçôes encontram-se, presentemente, ou no seio ou associadas a urna universidade. Porém, os museus universitârios no seu todo necessitare de enfrentar algumas questòes problemàtica» que, se nào forem devidamente resolvidas, poderào reduzir a sua esfera de influéncia e suscitar frustraçôes nos sens profissionais. Por exemplo, muitos museus universitârios sentir-se-ào divididos, sub-financiados, poderào julgar que nào contribuem de forma eficaz para os mais récentes desenvolvimentos museológicos exteriores aos muros do campus, no mundo mais vasto dos outros museus. Por outro lado, os museus universitârios poderào sentir-se isolados no pròprio interior do campus, com dificuldades em atingir e servir as diversas comunidades que lhes estào mais próximas. O novo comité international do ICOM - ICOM-UMAC ~ deverà apoiar o debate destas questòes e estimular nos museus universitârios a necessidade de contribuir de forma intensa quer para a pròpria comunidade académica quer para 0 desenvolvimentos dos museus em geraì.
The challenge: to convince potential funders and legislators of the value of research collections in a university museum
Creators: name: Jonaitis, Aldona
Publisher: name: International Committee for University Museums and Collections (UMAC)
Year: 2003
Subjects: subject: 060 Organisationen, Museumswissenschaft

description: One of the greatest challenges for university museums is to convince the public, the government, and private donors of the value of scientific collections. Too many visitors experience museum collections as simply vast quantities of nearly identical bird skins, mammal bones, pressed plants, without understanding why they are there and what larger function they serve. To communicate the importance of collections requires an ability to connect museum research with the interests of the public, government or donors, something which at times requires considerable imagination.
description: Um dos maiores desafios que os museus universitârios enfrentam consiste em convencer o publico, as autòridades oficiais e govemamentais e os mecenas privados do valor cientifico das suas colecçôes. Muitas vezes, a percepçâo destes enquanto visitantes resume-se a vastas quantidades de espécimens quase idênticos, cuja importância e razâo de existência lhes escapa frequentemente. Sensibilizar para 0 valor cientifico destas colecçôes requer uma capacidade em estabelecer pontes directas entre a investigaçâo por um lado, e os interesses do publico, do governo ou dos mecenas por outro. Algo que, muitas vezes, tem de ser feito com considerâveis doses de imaginaçào.
Saturation and solvability in abstract elementary classes with amalgamation
Creators: name: Vasey, Sebastien
Publisher: name: arXiv
Year: 2016
Subjects: subject: Logic (math.LO)
subject: FOS: Mathematics
subject: 03C48 (Primary), 03C45, 03C52, 03C55 (Secondary)

description: $\mathbf{Theorem.}$ Let $K$ be an abstract elementary class (AEC) with amalgamation and no maximal models. Let $λ> \text{LS} (K)$. If $K$ is categorical in $λ$, then the model of cardinality $λ$ is Galois-saturated. This answers a question asked independently by Baldwin and Shelah. We deduce several corollaries: $K$ has a unique limit model in each cardinal below $λ$, (when $λ$ is big-enough) $K$ is weakly tame below $λ$, and the thresholds of several existing categoricity transfers can be improved. We also prove a downward transfer of solvability (a version of superstability introduced by Shelah): $\mathbf{Corollary.}$ Let $K$ be an AEC with amalgamation and no maximal models. Let $λ> μ> \text{LS} (K)$. If $K$ is solvable in $λ$, then $K$ is solvable in $μ$.
description: 19 pages
Boron-Doped Polycrystalline Silicon Thin Films Deposited by CVD on Glass Substrates
Creators: name: Benvenuto, A.
name: Buitrago, R.H.
name: Schmidt, J.A.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Thin Film Solar Cells
Thin Film Crystalline Silicon Solar Cells and Wafer Equivalents

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 3584-3587
description: In this work, we use atmospheric pressure thermal chemical vapour deposition (AP-CVD) to deposit
thin poly-Si films on glass substrates. The CVD reactor is a batch-type hot-wall reactor, employing SiHCl3 as a
precursor, BBr3 as a doping agent and H2 as a carrier and reaction gas. We use a temperature of 850 ºC, and a
commercial aluminosilicate float glass as a substrate. The films that we obtain are homogeneous and well adhered to
the substrate. Scanning electron microscopy (SEM) is used to observe the surface and the cross-section of the
samples. We find a columnar structure suitable for the electrical conduction in photovoltaic cells. X-ray diffraction
reveals a strong (2 2 0) preferential orientation of the films, which is indicative of a low density of intra-grain defects.
Dark conductivity measurements as a function of temperature show that the films can be grown intrinsic, slightly ptype
or highly p-type. Activation energies between 0.61 and 0.03 eV have been obtained. In conclusion, our results
demonstrate the feasibility of directly depositing doped poly-Si thin films on glass substrates at intermediate
temperatures, with characteristics that make them appropriate for photovoltaic applications.
Massive relic galaxies prefer dense environments
Creators: name: de Arriba, Luis Peralta
name: Quilis, Vicent
name: Trujillo, Ignacio
name: Cebrián, María
name: Balcells, Marc
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study the preferred environments of $z \sim 0$ massive relic galaxies ($M_\star \gtrsim 10^{10}~\mathrm{M_\odot}$ galaxies with little or no growth from star formation or mergers since $z \sim 2$). Significantly, we carry out our analysis on both a large cosmological simulation and an observed galaxy catalogue. Working on the Millennium I-WMAP7 simulation we show that the fraction of today massive objects which have grown less than 10 per cent in mass since $z \sim 2$ is ~0.04 per cent for the whole massive galaxy population with $M_\star > 10^{10}~\mathrm{M_\odot}$. This fraction rises to ~0.18 per cent in galaxy clusters, confirming that clusters help massive galaxies remain unaltered. Simulations also show that massive relic galaxies tend to be closer to cluster centres than other massive galaxies. Using the New York University Value-Added Galaxy Catalogue, and defining relics as $M_\star \gtrsim 10^{10}~\mathrm{M_\odot}$ early-type galaxies with colours compatible with single-stellar population ages older than 10 Gyr, and which occupy the bottom 5-percentile in the stellar mass-size distribution, we find $1.11 \pm 0.05$ per cent of relics among massive galaxies. This fraction rises to $2.4 \pm 0.4$ per cent in high-density environments. Our findings point in the same direction as the works by Poggianti et al. and Stringer et al. Our results may reflect the fact that the cores of the clusters are created very early on, hence the centres host the first cluster members. Near the centres, high-velocity dispersions and harassment help cluster core members avoid the growth of an accreted stellar envelope via mergers, while a hot intracluster medium prevents cold gas from reaching the galaxies, inhibiting star formation.
description: 9 pages, 6 figures. Updated to match the published version in MNRAS
Image Processing Techniques for Correlation of Photoluminescence Images of As-Cut Wafers with Final Cell IV Parameters
Creators: name: True, B.
name: Stavrides, A.
name: Latchford, I.
Publisher: name: WIP
Year: 2011
Subjects: Wafer-based Silicon Solar Cells and Materials Technology
Manufacturing Issues and Processing

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 2095-2098
description: We present an image processing algorithm for photoluminescence (PL) images of multi-crystalline
silicon wafers. The algorithm takes advantage of existing machine vision techniques to generate a metric which
predicts final cell Voc times Isc and efficiency based on the PL image of the as-cut wafer from which the cell is
made. The algorithm is based on image thresholding and basic statistical analysis of the PL intensity. It can be
applied to a high resolution (more than 1 MP) photoluminescence image in less than 1 second, so it can be used on inline
systems acquiring images at speeds of 3600 wafers per hour. A correlation coefficient approaching 0.9 with
mean absolute error of 1% or less is routinely obtained between predicted efficiency and measured efficiency using
this algorithm and Intevac’s NanoVista® PL tool.
University museums: distinct sites of intersection for diverse communities
Creators: name: Mayer, Carol E.
Publisher: name: International Committee for University Museums and Collections (UMAC)
Year: 2003
Subjects: subject: 060 Organisationen, Museumswissenschaft

description: In her article 'The Politics of exhibiting culture: Legacies and possibilities' Shelley Ruth Butler refers to "a problematic dichotomy that exists in museum literature between critical and optimistic perspectives on exhibiting culture" (BUTLER 2000: 74). Critical museology, she says, raises questions about the relationship between existing museum practice and the history of a "politics of domination" that has underpinned how western museums exhibit non-western cultures, the "other." This has resulted in the re-evaluation of motivations that have driven the collecting, classifying, and displaying of material culture. Optimistic museology, on the other hand, focuses "on the role of museums in public education and in facilitating conversation between diverse and multi-cultural citizens" (BUTLER 2000: 74). The intent of this paper is to discuss how a university museum proved to be the appropriate site of intersection for these two perspectives. I will focus specifically on our work with diverse communities on the development of an exhibition and programming about Islam and Muslim life.
description: No artigo 'The Politics of exhibiting culture: Legacies and possibilities', Shelley Ruth Butler refere-se à "dicotomia problematica, frequente na literatura, entre urna perspectiva critica e urna perspectiva optimista da exposiçâo de cultura [material]". A museologia crìtica, argumenta Butler, levanta questôes sobre a história de urna "politica de domìnio" que prevaleceu na pratica dos museus ocidentais e respectivas exposiçôes sobre culturas nâo ocidentais, encaradas comò "o outro". A museologia optimista, por outro lado, da ênfase "ao papel educativo dos museus e à promoçâo do dialogo plural e multi-cultural entre cidadâos" (BUTLER 2000: 74). Este artigo discute comò um museu universitario pode constituir um espaço apropriado para a intersecçâo destas duas perspectivas. Centrar-me-ei essencialmente no traballio com comunidades multi-culturais no desenvolvimento de urna exposiçâo e de programas educativos sobre o Islâo e a vida muçulmana.