cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Conversion of hydroxycinnamic acids by Furfurilactobacillus milii in sorghum fermentations: Impact on profile of phenolic compounds in sorghum and on ecological fitness of Ff. milii
Creators: Gaur, Gautam
Damm, Sandra
Passon, Maike
Lo, Hiu Kwan
Schieber Andreas
Gänzle, Michael G.
Publisher: name: University of Alberta Library
Year: 2023

The conversion of phenolic compounds by lactobacilli in food fermentations contributes to food quality. The metabolism of phenolics by lactobacilli has been elucidated in the past years but information on the contribution of specific enzymes in food fermentations remains scarce. This study aimed to address this gap by disruption of genes coding for the hydroxycimmanic acid reductase Par1, the hydroxycinnamic acid decarboxylase Pad, the hydrocinnamic esterase EstR, and strains with disruption of all three genes in Furfurilactobacillus milii FUA3583. The conversion of phenolics by Ff. milii and its isogenic mutants in sorghum fermentations was studied by LC-UV and LC-UV-MS/MS analyses. Ff. milii FUA3583 converted hydroxycinnamic acids predominantly with Par1. Vinylphenols were detected only in mutants lacking par1. A phenotype for the estR defective mutant was not identified. The formation of pyrano-3-deoxyanthocyanidins was observed only after fermentation with strains expressing Pad. Specifically, formation of these compounds was low with Ff. milii FUA3583, substantially increased in the Par1 mutant and abolished in all mutants with disrupted pad. Competition experiments with Ff. milii FUA3583 and its isogenic mutants demonstrated that expression of one of the two metabolic pathways for hydroxycinnamic acids increases the ecological fitness of the strain. Disruption of EstR in a Δpar1Δpar2Δpad background improved ecological fitness, indirectly demonstrating a phenotype of the esterase in Ff. milii. The documentation of the functionality of genes coding for conversion of hydroxycinnamic acids may support the selection of starter cultures for improved quality of fermented cereal products.
Automatic Extraction of Descriptive Metadata to Promote the Usage of RDM Tools
Creators: name: Heinrichs, Benedikt Paul Anton
Publisher: name: RWTH Aachen University
Year: 2022
Subjects: Extraction
Metadata
Research Data

description: NFDI4Ing Conference 2022, online, 26 Oct 2022 - 27 Oct 2022; 17 Folien (2022). doi:10.5281/zenodo.7362037
An Adjoint Method for a High-Order Discretization of Deforming Domain Conservation Laws for Optimization of Flow Problems
Creators: name: Zahr, Matthew J.
name: Persson, Per-Olof
Publisher: name: arXiv
Year: 2015
Subjects: subject: Optimization and Control (math.OC)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: The fully discrete adjoint equations and the corresponding adjoint method are derived for a globally high- order accurate discretization of conservation laws on parametrized, deforming domains. The conservation law on the deforming domain is transformed into one on a fixed reference domain by the introduction of a time-dependent mapping that encapsulates the domain deformation and parametrization, resulting in an Arbitrary Lagrangian-Eulerian form of the governing equations. A high-order discontinuous Galerkin method is used to discretize the transformed equation in space and a high-order diagonally implicit Runge- Kutta scheme is used for the temporal discretization. Quantities of interest that take the form of space-time integrals are discretized in a solver-consistent manner. The corresponding fully discrete adjoint method is used to compute exact gradients of quantities of interest along the manifold of solutions of the fully discrete conservation law. The adjoint method is used to solve two optimal shape and control problems governed by the isentropic, compressible Navier-Stokes equations. The first optimization problem seeks the energetically optimal trajectory of a 2D airfoil given a required initial and final spatial position. The optimization solver, driven by gradients computed via the adjoint method, reduced the total energy required to complete the specified mission nearly an order of magnitude. The second optimization problem seeks the energetically optimal flapping motion and time-morphed geometry of a 2D airfoil given an equality constraint on the x-directed impulse generated on the airfoil. The optimization solver satisfied the impulse constraint to greater than 8 digits of accuracy and reduced the required energy between a factor of 2 and 10, depending on the value of the impulse constraint, as compared to the nominal configuration.
description: 37 pages, 17 figures, 6 tables
Degradation of Crystalline Silicon Modules: A Case Study on 785 Samples After Two Years under Operation
Creators: name: Coello, J.
Publisher: name: WIP
Year: 2011
Subjects: Components for PV Systems
PV Modules

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 3500-3503
description: This article reports on the results obtained regarding the quality control performed in our IEC 17025
accredited laboratory on 785 crystalline silicon modules after two years under operation. The measurements were carried
in 2008 on the modules before installation, and on 2009 and 2010 to verify the performances after one and two year under
real operation, respectively. Photovoltaic modules belong to six different manufacturers from two large PV plants. The
overall results show that the peak power decreases between 1.0% and 3.5%within the first year and between 0.4% and
1.3% in the following year. The same trend is followed by the Isc and Voc values; on the contrary, the most noticeable
change appears in the Vmpp value, which keeps almost constant within the first year, but dramatically drops at the end of
the second year, indicating an increase in the modules' series resistance.
Analytical Three-Dimensional Modelling of the Potential Distribution in the Emitter of Concentrator Solar Cells under Non Uniform Illumination
Creators: name: Costagliola, M.
name: Daliento, S.
name: Lancellotti, L.
name: Roca, F.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Wafer-Based Silicon Solar Cells and Materials Technology
Mono- and Multicrystalline Silicon Materials and Cells

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 2277-2279
description: Commercial concentrator systems yield to non-uniform illumination profiles. This is a source of
degradation for the performances of solar cells and further worsen by the consequent non-uniform temperature
distribution. The modelling of these effects can be effectively performed only if three-dimensional effects due to the
lateral flow of the current into the emitter are taken into account. In this paper, a three-dimensional model allowing to
evaluate the behaviour of solar cells under arbitrary non-uniform illumination profile is presented. Numerical
simulations were performed in order to evaluate the effectiveness of the model.
Assessing variation in below-ground organic matter dynamics in the Ramsar-declared Nylsvley Wetland system, South Africa
Creators: name: Dalu, Tatenda
name: Cuthbert, Ross N.
name: Makhuvha, Lufuno
name: Dondofema, Farai
name: Wasserman, Ryan J.
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biotechnology
subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified
subject: Cancer
subject: Inorganic Chemistry
subject: FOS: Chemical sciences

description: Wetlands physical and biological processes are fundamental to the distribution and structuring of organic matter in sediments. This study investigated spatial and temporal changes in organic matter sources in sediments within the Nylsvley Wetland, South Africa across two seasons, five sites and three wetland zones and identified pertinent contributors to sediment organic matter. Results showed distributions were uneven throughout the wetlands, with the seasonal zone having slightly high sediment organic matter in the cool-dry season and the permanent zone had high sediment organic matter in the hot-wet season, whereas the temporary zone had low SOM concentrations. Significant differences in nutrient concentrations were observed across wetland zones and seasons for Phosphorous, Potassium, Calcium and Magnesium, with the seasonal zone tending to be the most nutrient-rich in the cool-dry season, and with permanent zone nutrient levels rising substantially in the hot-wet season. Sediment δ13C differed significantly among wetland zones, whereas δ15N was statistically similar. Autochthonous plants were the main sources of organic matter in sediments overall across sites and zones. This study’s findings help to better understand the distribution of organic matter in wetland ecosystems and the role wetland zones play in the seasonal provisioning of allochthonous inputs.
High Temperature Stability of PECVD Aluminium Oxide Layers Applied as Negatively Charged Passivation on c-Si Surfaces
Creators: name: Kania, D.
name: Saint-Cast, P.
name: Hofmann, M.
name: Rentsch, J.
name: Preu, R.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Wafer-Based Silicon Solar Cells and Materials Technology
Mono- and Multicrystalline Silicon Materials and Cells

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 2292-2296
description: Plasma-enhanced chemical vapor deposited (PECVD) aluminum oxide (AlOx) layers were
developed using a high-throughput industrial-type inline tool. The layers were investigated in order to receive
high passivation quality and thermal stability. With these layers, serving as passivation of low resistivity p-type
silicon surfaces, effective lifetimes of 2.3 ms (1 Ω·cm float-zone (FZ) silicon) could be achieved. The influence
of different thermal treatments was studied, applying annealing in forming gas (FGA) and firing in a range of
350 °C to 900 °C. Different layer properties were investigated; appearance of blistering on the surface by means
of scanning electron microscopy (SEM) measurements, electrical properties such as the fixed negative charge
density Qf and the interface trap density Dit within the AlOx layer by means of capacitance-voltage (C-V)
measurements. Firing resistant PECVD AlOx layers could be developed that show excellent passivation quality
with Qf = -3.1·1012 cm-2 and Dit = 4·1010 cm-2 eV-1. Stack systems with an optional capping layer on top of the
AlOx film, consisting of PECVD amorphous hydrogenated silicon nitride (a-SiNx:H), are presented as a solution
for industrial screen printed silicon solar cells.
Emergent gauge fields from curvature in single layers of transition-metal dichalcogenides
Creators: name: Ochoa, Hector
name: Zarzuela, Ricardo
name: Tserkovnyak, Yaroslav
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We analyze the electron dynamics in corrugated layers of transition-metal dichalcogenides. Due to the strong spin-orbit coupling, the intrinsic (Gaussian) curvature leads to an emergent gauge field associated with the Berry connection of the spinor wave function. We discuss the gauge field created by topological defects of the lattice, namely, tetragonal/octogonal disclinations and edge dislocations. Ripples and topological disorder induce the same dephasing effects as a random magnetic field, suppressing the weak localization effects. This geometric magnetic field can be detected in a Aharonov-Bohm interferometry experiment by measuring the local density of states in the vicinity of corrugations.
description: 5 pages, 4 figures, supplementary material (6 pages, 2 figures); to appear in Physical Review Letters
Interaction between Micromorph Solar Cells and the TCO Surface during Laser Patterning of Silicon Layer for Thin-Film PV Modules
Creators: name: Weber, U.
name: Reuner, J.
name: Scheumann, V.
name: Psyk, W.
name: Berginski, M.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Thin Films Solar Cells
Amorphous and Microcrystalline Silicon Solar Cells

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 2743-2745
description: The laser power for the fabrication of the patterning lines for thin-film micromorph silicon PV
modules was varied around the working point of the standard P2 process (removal of semiconductor). The resulting
P2 lines were characterized by TOF-SIMS imaging and high-resolution depth profiling of the surface-near region.
Si- and O-containing residues were detected at the surface. Additionally, an oxygen depletion of the underlying
SnOx film was found. Both factors have an impact on series resistance and efficiency of Si-based thin film modules.
A dependence on laser power is observed: With increasing locally applied laser power density, the amount of Si
residues as well as the thickness of the oxygen-reduced SnOx surface layer is enhanced. Guidelines for the
optimization of the P2 laser patterning process are derived.
The Collections of the University of Applied Arts Vienna
Creators: name: Frottier, Elisabeth
name: Werkner, Patrick
Publisher: name: International Committee for University Museums and Collections (UMAC)
Year: 2008
Subjects: Art
Architectural Models
Oskar Kokoschka

description: The Collections of the University of Applied Arts include works of art, architecture and design, and have recently expanded to incorporate costume and fashion collections. They are actively used in research and teaching.
Micro-morphological analysis of foliar uptake and retention of airborne particulate matter (PM)-bound toxic metals: implications for their phytoremediation
Creators: name: Gajbhiye, Triratnesh
name: Pandey, Sudhir Kumar
name: Malik, Tanzil Gaffar
name: Kim, Ki-Hyun
name: Khan, Mohammed Latif
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Cell Biology
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: Plant Biology

description: While airborne particulate matter (PM) pollution is a serious problem for urban environments, it can be reduced through uptake by plant leaves. In this study, we investigated and compared the uptake of PM-bound toxic metals by different plant species. Enrichment factor (EF) and correlation analyses across different sample types indicated anthropogenic origins of these toxic metals with airborne source signatures. Scanning electron microscopy (SEM) analyses of both leaf surfaces (adaxial and abaxial) suggested that the micro-morphological properties of the leaf surface (e.g. stomata, trichomes, epicuticular wax, and epidermal appendages) control the accumulation of PM and associated metals in plant leaves. Senna siamea leaves showed the most micro-morphological variation as well as the maximum concentration of toxic metals. It was found that foliar uptake of PM-bound toxic metals is affected by leaf surface morphological characteristics. Our results imply that plant speciation strategies can be used to help decrease PM pollution.
Development of a-Si:H /μC-Si:H Tandem Modules Solar Cells by VHF Technique on 0.79m2 Size Glass Substrates
Creators: name: Zhao, Y.
name: Zhang, X.
name: Ren, H.
name: Ge, H.
name: Wei, C.
name: Zhang, Y.
name: Zhang, D.
name: Sun, J.
name: Xu, S.
name: Duan, L.
name: Wang, Z.
name: Hou, G.
name: Zhang, J.
name: Chen, X.
name: Xiong, S.
name: Bai, L.
name: Geng, X.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Thin Films Solar Cells
Amorphous and Microcrystalline Silicon Solar Cells

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 2627-2630
description: The deposition of homogenous hydrogenated microcrystalline silicon (μc-Si:H) layers is crucial for the
industry production of high efficiency μc-Si:H single junction and a-Si:H/μc-Si:H tandem module. The uniformity of
the layers is strongly influenced by the process parameters, e.g. pressure, electrode gap or gas flow rate, but can also
be influenced by the hardware configuration of deposition system. The deposition rate uniformity, dark/photo
conductivity uniformity, and the effect on the crystallinity distribution of the intrinsic μc-Si:H layer were studied in
this paper. After optimizing of the adjusted hardware and the process parameters, a quite uniform distribution of the
materials of a-Si:H or μc-Si:H was achieved. Micromorph tandem solar module fabricated on the commercial SnO2
substrate of 0.79m2 area with active aperture conversion efficiency of 8.12% (only Al back reflector) has been
obtained and shown in the end
Localizing the Ensemble Kalman Particle Filter
Creators: name: Robert, Sylvain
name: Künsch, Hans R.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Applications (stat.AP)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Ensemble methods such as the Ensemble Kalman Filter (EnKF) are widely used for data assimilation in large-scale geophysical applications, as for example in numerical weather prediction (NWP). There is a growing interest for physical models with higher and higher resolution, which brings new challenges for data assimilation techniques because of the presence of non-linear and non-Gaussian features that are not adequately treated by the EnKF. We propose two new localized algorithms based on the Ensemble Kalman Particle Filter (EnKPF), a hybrid method combining the EnKF and the Particle Filter (PF) in a way that maintains scalability and sample diversity. Localization is a key element of the success of EnKFs in practice, but it is much more challenging to apply to PFs. The algorithms that we introduce in the present paper provide a compromise between the EnKF and the PF while avoiding some of the problems of localization for pure PFs. Numerical experiments with a simplified model of cumulus convection based on a modified shallow water equation show that the proposed algorithms perform better than the local EnKF. In particular, the PF nature of the method allows to capture non-Gaussian characteristics of the estimated fields such as the location of wet and dry areas.
Aldo Manuzio e gli umanisti veneti
Creators: name: Bevegni, Claudio
Publisher: name: FuturoClassico FCl
Year: 2022
Subjects: Aldus Manutius; Venice and Veneto; print art; Humanism

description: In his feverish activity as a publisher in Venice, Aldo Manuzio kept in touch with humanists and scholars from all over Europe, most of whom were also his collaborators: Erasmus of Rotterdam stands out above all. Many of these humanists, of course, were natives of Veneto, particularly of Venice, such as Pietro Bembo, Andrea Navagero and Marino Sanudo. This paper reviews the most important Venetian humanists with whom Aldo was in contact: philologists who helped him in the publication of his editions, scholars who lent him their manuscripts, dedicatees of his Greek and Latin editions or even just simple friends, animated by the same ideals as Aldo.
description: FuturoClassico FCl, N. 8 (2022)
Two Effective Approaches for Improvement of High Rate Growth µc-Si:H Solar Cell Performance
Creators: name: Han, X.
name: Hou, G.
name: Zhang, X.
name: Li, G.
name: Wei, C.
name: Dai, Z.
name: Chen, X.
name: Sun, J.
name: Zhao, Y.
name: Geng, X.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Thin Films Solar Cells
Amorphous and Microcrystalline Silicon Solar Cells

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 2631-2633
description: Hydrogenated microcrystalline silicon (μc-Si:H) solar cells were deposited with very high frequency plasma
enhanced chemical vapor deposition (VHF-PECVD) process at high deposition rates in a high power and high pressure
regime. The structural evolution in μc-Si:H films and solar cells has been investigated. In order to reduce the incubation layer
thickness in the initial stage, a high-quality p/i interface layer has been developed by lowering silane concentration and VHF
power simultaneously. This interface layer not only acts as a seed layer for the high-rate deposited i-layer, but also it can
reduce the ion bombardment on the p/i interface. Then, a novel VHF power profiling technique, which was designed by
dynamically decreasing the VHF power step by step during the deposition of μc-Si:H, has been developed to control the
structural evolution along the growth direction in the bulk i-layer. Another advantage of this VHF power profiling technique
is the reduced ion bombardments on growth surface because of decreasing the VHF power. At last, a high conversion
efficiency of 9.36% has been obtained for a single junction μc-Si:H p-i-n solar cell with i-layer deposited at deposition rate
over 10 Å/s.
Analogia ed etimologia nel primo libro dell’Institutio oratoria: polemiche ed exempla varroniani
Creators: name: Duso, Antonella
Publisher: name: FuturoClassico FCl
Year: 2022
Subjects: Varro; Quintilian; ancient grammar; exempla; tradition of grammatical texts.

description: In the first book of his Institutio oratoria (I, 4-8), one of Quintilian’s aims is to establish which grammar skills are needed by the prospective orator. The most important theoretical passages are §§ 1-45 of the sixth chapter. In this section, Quintilian lists four criteria of linguistic correctness: one of them, ratio, incorporates the criteria of analogy and etymology, which are, in turn, the two theoretical principles of Varro’s De lingua Latina. This article investigates how Quintilian summarizes Varronian arguments on the one hand, and on the other hand how he reuses Varro’s lexical examples, often contextualized in a dif­fer­­ent theoretical debate. This discrepancy between the theoretical context and practical exempla is particularly significant. It reflects the difficulty to manage a sophisticated linguistic theory and at the same time it suggests that, already in the age of Quintilian, linguistic-grammatical collections of quota­tions from Varro’s work probably began to circulate separately from the whole work.
description: FuturoClassico FCl, N. 8 (2022)
Multi-wavelength lens reconstruction of a $\textit{Planck}$ $\&$ $\textit{Herschel}$-detected star-bursting galaxy
Creators: name: Timmons, Nicholas
name: Cooray, Asantha
name: Riechers, Dominik A.
name: Nayyeri, Hooshang
name: Fu, Hai
name: Jullo, Eric
name: Gladders, Michael D.
name: Baes, Maarten
name: Bussmann, R. Shane
name: Calanog, Jae
name: Clements, David L.
name: da Cunha, Elisabete
name: Dye, Simon
name: Eales, Stephen A.
name: Furlanetto, Cristina
name: Gonzalez-Nuevo, Joaquin
name: Greenslade, Joshua
name: Gurwell, Mark
name: Messias, Hugo
name: Michałowski, Michał J.
name: Oteo, Iván
name: Pérez-Fournon, Ismael
name: Scott, Douglas
name: Valiante, Elisabetta
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a source-plane reconstruction of a ${\it Herschel}$ and ${\it Planck}$-detected gravitationally-lensed dusty star-forming galaxy (DSFG) at $z=1.68$ using {\it Hubble}, Sub-millimeter Array (SMA), and Keck observations. The background sub-millimeter galaxy (SMG) is strongly lensed by a foreground galaxy cluster at $z=0.997$ and appears as an arc of length $\sim 15^{\prime \prime}$ in the optical images. The continuum dust emission, as seen by SMA, is limited to a single knot within this arc. We present a lens model with source plane reconstructions at several wavelengths to show the difference in magnification between the stars and dust, and highlight the importance of a multi-wavelength lens models for studies involving lensed DSFGs. We estimate the physical properties of the galaxy by fitting the flux densities to model SEDs leading to a magnification-corrected star formation rate of $390 \pm 60$ M$_{\odot}$ yr$^{-1}$ and a stellar mass of $1.1 \pm 0.4\times 10^{11}$ M$_{\odot}$. These values are consistent with high-redshift massive galaxies that have formed most of their stars already. The estimated gas-to-baryon fraction, molecular gas surface density, and SFR surface density have values of $0.43 \pm 0.13$, $350 \pm 200$ M$_{\odot}$ pc$^{-2}$, and $\sim 12 \pm 7~$M$_{\odot}$ yr$^{-1}$ kpc$^{-2}$, respectively. The ratio of star formation rate surface density to molecular gas surface density puts this among the most star-forming systems, similar to other measured SMGs and local ULIRGS.
description: 11 pages, 11 figures, ApJ accepted for publication
Is research and teaching a key for preserving university collections and museums?
Creators: name: Soubiran, Sébastien
Publisher: name: International Committee for University Museums and Collections (UMAC)
Year: 2011
Subjects: subject: University of Strasbourg
subject: Collections and museums
subject: Scientific heritage
subject: 060 Organisationen, Museumswissenschaft

description: It is now well known that one of the main challenges for university collections is the recognition of the usefulness of their heritage value within the institution. As long as university collections are used for research and teaching the danger of their “disappearance” is less acute. However, how to maintain this link when scientific activity is characterized by a strong turn over regarding subject of interest, practices, teaching and research tools? When internet and communication technologies open a new era based on the immaterial and the virtual? I would present in my paper an overview of the various answers that have been put in place within the University of Strasbourg to maintain or give new value for teaching or research activities to our collections in different fields like Egyptology, ethnology, physics, zoology, botany, palaeontology, anatomy or history of science. A particular attention would also be put on the compatibility of research and teaching missions with, on the one hand, the long term preservation of the collections and, on the other hand, the accessibility to general public. In other words, to what extend is it possible to reconcile research and teaching activities with university heritage preservation? The role of collections and museums as ‘tools/resources/elements’ for teaching and research is of major interest for several reasons. Firstly because university collections and museums are primary knowledge artifacts. Secondly because research and teaching have been the main activities of universities since at least the late 19th century. Thirdly, because this genuine link makes university collections and museum on the one hand precious and unique and on the other hand fragile, vulnerable and short-lived compared to cultural collections and other museum institutions. And last but not least, because most of the people in charge of university collections are academics or are managed by academics. In my paper I would like to address various questions: is the preservation of collections for the purposes of research and teaching an issue to be discussed or simply a matter of fact? Are teaching and research the only justifications for maintaining scientific collections? Do we only preserve them through constant use as teaching or research tools? Based on various examples in my own university, my viewpoint is obviously not only framed by many national specificities but also by the fact that a majority of our collections are collections related to ‘hard’ science. The University of Strasbourg does not have art collections.
Rotary Ceramic Targets for TCO Sputter Deposition in TF-PV Manufacturing: a Cost Effective and Qualitative Solution
Creators: name: Lippens, P.
name: Murez, C.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Thin Films Solar Cells
Amorphous and Microcrystalline Silicon Solar Cells

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 2634-2637
description: Rotary magnetrons offer many advantages, both in terms of coating quality improvements as in terms
of production cost. Although the sputtering targets needed for such magnetrons are normally much more expensive
than their planar equivalents, the total cost of ownership of rotary targets turns out to be considerably lower than for
planar targets. This is due to higher process yield (less arcing, reduced particles and pinholes), higher target
utilization and better collection efficiency, all having a favourable impact on the TCO materials’ cost per Wp.
Equipment depreciation and labour costs per produced Wp are also reduced in case of rotary targets as the total
yearly capacity of a coating line with rotary magnetrons is much higher than for a line with planar counterparts:
indeed, higher magnetron discharge power levels and increased relative line up-time with rotary magnetrons are the
main drivers here. Even energy costs are reduced in case of rotary technology. Unfortunately, many PVmanufacturers
just take the target cost per kilogram into account when they make technological comparisons. This
work will prove that a more in depth cost analysis is needed using the example of a transparent conductive oxide
(TCO) coating. Indeed, today, in many TF-PV products, one or more sputter deposited TCO’s are used of which
ZnO:Al (AZO), i-ZnO and ITO are the most common. As this TCO is typically responsible for more than 5 % of the
front end production cost and its characteristics contribute considerably to the cell efficiency, it is worthwhile
focussing on this component of the thin film cell.
A Desired PAR-Achieving Precoder Design for Multi-User MIMO OFDM based on Concentration of Measure
Creators: name: Cha, Hyun-Su
name: Kim, Dong Ku
Publisher: name: arXiv
Year: 2016
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: For multi-user multiple-input and multiple-output (MIMO) wireless communications in orthogonal frequency di- vision multiplexing systems, we propose a MIMO precoding scheme providing a desired peak-to-average power ratio (PAR) at the minimum cost that is defined as received SNR degradation. By taking advantage of the concentration of measure, we formulate a convex problem with constraint on the desired PAR. Consequently, the proposed scheme almost exactly achieves the desired PAR on average, and asymptotically attains the desired PAR at the 0.001 point of its complementary cumulative distribution function, as the number of subcarriers increases.
description: 4 pages, 3 figures, submitted to IEEE Signal Processing Letters
M.G. Iodice, A. Marchetta (a cura di), Delectat varietas. Miscellanea di Studi in memoria di Michele Coccia (Roma 2020)
Creators: name: De Angelis, Chiara
Publisher: name: FuturoClassico FCl
Year: 2022

description: FuturoClassico FCl, N. 8 (2022)
A Comprehensive Study for Emitter Formation, with Spin-on Dopant Source, on Solar Grade Silicon Solar Cells, Suitable for Ablated Laser Emitter Contact Formation
Creators: name: Izzi, M.
name: Serenelli, L.
name: De Iuliis, S.
name: Tucci, M.
name: Salza, E.
name: Janusoniene, V.
name: Janusonis, J.
name: Juzumas, V.
name: Zaaiman, W.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Wafer-Based Silicon Solar Cells and Materials Technology
Mono- and Multicrystalline Silicon Materials and Cells

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 2094-2098
description: Low cost and high efficiency are the keys to reducing the cost of photovoltaic electricity. To realize high
efficiency, the quality of emitter is critical. In this paper we report on the study of different emitter formation, fabricated
on solar grade silicon, suitable for new solar cells manufacturing process. Laser ablation of a passivation layer is a key
factor to preserve the quality of the emitter before the contact formation. Emitter formation is settled in order to produce
lower cost high efficiency solar cells processed on large area using techniques scalable to industry. The work has been
focused on the combination of different emitter formation. Starting from standard POCL3 emitter formation considered
as reference, a spin-on dopant (SOD) with different phosphorous concentration has been used to obtain the most suitable
configuration for the emitter in conjunction with a good front ohmic contact formation, using NI-Cu (ablating ,by laser, a
passivation layer) and back contact collection realized via laser fired contact. All the different diffused profiles has been
analyzed and characterized to assure the right choice. Starting from phosphorous spin-on sources an appropriate doping
profile, in an open tube, has been identified in such a way to have both: a good contac formation, realized via laser
ablation of an antireflection coating and passivation layer realized on emitter side, and an effective light absorption. The
obtained diffusion profile coupled with an antireflection and passivation layer, formed by a combination of silicon nitride
and amorphous silicon at low temperature, has given a value of Voc over 620 mV.
J.C. Iglesias-Zoido (ed.), Conciones ex Historicis excerptae. Nuevos estudios sobre las antologías de discursos historiográficos (Coimbra 2020)
Creators: name: Gómez Copé, Jesús
Publisher: name: FuturoClassico FCl
Year: 2022

description: FuturoClassico FCl, N. 8 (2022)
Chiral magnetic conductivity and surface states of Weyl semimetals in topological insulator ultra-thin film multilayer
Creators: name: Owerre, S. A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate an ultra-thin film of topological insulator (TI) multilayer as a model for a three-dimensional (3D) Weyl semimetal. We introduce tunneling parameters $t_S$, $t_\perp$, and $t_D$, where the former two parameters couple layers of the same thin film at small and large momenta, and the latter parameter couples neighbouring thin film layers along the $z$-direction. The Chern number is computed in each topological phase of the system and we find that for $t_S,t_D>0$, the tunneling parameter $t_\perp$ changes from positive to negative as the system transits from Weyl semi-metallic phase to insulating phases. We further study the chiral magnetic effect (CME) of the system in the presence of a time dependent magnetic field. We compute the low-temperature dependence of the chiral magnetic conductivity and show that it captures three distinct phases of the system separated by plateaus. Furthermore, we propose and study a 3D lattice model of Porphyrin thin film, an organic material known to support topological Frenkel exciton edge states. We show that this model exhibits a 3D Weyl semi-metallic phase and also supports a 2D Weyl semi-metallic phase. We further show that this model recovers that of 3D Weyl semimetal in topological insulator thin film multilayer. Thus, paving the way for simulating a 3D Weyl semimetal in topological insulator thin film multilayer. We obtain the surface states (Fermi arcs) in the 3D model and the chiral edge states in the 2D model and analyze their topological properties.
description: 19 pages with 9 figures
Optimisation of Industrial n-Type Silicon Solar Cells with Aluminium-Alloyed Rear Emitter by Means of 2D Numerical Simulation
Creators: name: Rüdiger, M.
name: Schmiga, C.
name: Rauer, M.
name: Hermle, M.
name: Glunz, S.W.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Wafer-Based Silicon Solar Cells and Materials Technology
Mono- and Multicrystalline Silicon Materials and Cells

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 2280-2286
description: We present a detailed analysis on the optimisation of n-type silicon solar cells with aluminiumalloyed
rear p+ emitter for industrial applications by means of two-dimensional numerical simulation in order
to identify the potential and the limiting factors for this cell concept. It is demonstrated, that the characteristic
solar cell parameters can be simulated very well taking two-dimensional effects into account, leading to an excellent
agreement compared to the measured results. Based on these simulations we show a complete and continuative
study on the optimisation of this solar cell concept, analysing gradually three different regions of the solar cell.
Firstly, the influence of the front side is investigated discussing different front surface fields and how they perform
with an additional selective front surface field below the front contacts. Secondly, the influence of the base is
discussed and how doping concentrations and pitch variations influence each other. Finally, the back side of this
solar cell concept is analysed, how variations of the aluminium-alloyed rear p+ emitters influence the cell
performance.
Going wild in banana breeding: the cross-compatibility and multi-omics of Musa cheesmanii
Creators: name: Liu, Xin
Publisher: name: figshare
Year: 2025
Subjects: classificationCode: 460203
subject: Evolutionary computation

description: Bananas (Musa spp.) are crucial for food security, but modern cultivars, derived from a limited number of wild species and propagated vegetatively, have low genetic diversity, weakening their disease resistance. To address these challenges, urgently identifying new parent lines for banana breeding programs is essential. In this study, we evaluated the untapped value of Musa cheesmanii in banana breeding, particularly its resistance to Fusarium wilt. We confirmed its high level of resistance and successfully crossbred it with two Musa ABB cultivars, 'Yulin' and 'Jinyu'. The resulting hybrids exhibited vigorous growth, high yield, and extended shelf life, underscoring the value of this wild species for breeding innovation. Additionally, we present a fully completed genome of M. cheesmanii, with multi-omics analysis offering insights into its diversification, black pseudo-stem coloration, and disease resistance in the Musa genus. Overall, M. cheesmanii is a promising male parent for banana breeding, providing a breakthrough in genetic diversity and the development of superior cultivars.
Analysis and Characterization of an Outdoor CPV System. Comparative with Other PV Technologies
Creators: name: García-Domingo, B.
name: Aguilera Tejero, J.
name: Fuentes, M.
name: Muñoz, J.V.
name: Nofuentes Garrido, G.
Publisher: name: WIP
Year: 2011
Subjects: Advanced Photovoltaics : New Concepts and Ultra-High Efficiency
Terrestrial Concentrator Systems

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 647-651
description: CPV is a relatively new technology which is nowadays in a preliminary phase of research and
development. The presented work has the mission of deepen in the study and analysis of the outdoor performance of
CPV modules, and their later comparison with other more experimented photovoltaic technologies. In this way, it is
possible to characterize the CPV modules operation and propose technical and design improvements to optimize their
performance.
It has been analyzed the influence of the external atmospheric conditions (incident irradiance, ambient temperature,
wind speed and spectral irradiance distribution) over the electric performance of the modules under study. To do that,
it has been used an automatic test & measurement system, which traces the I-V curve of each module (every 5
minutes), and obtains their main electrical parameters, and meteorological outdoor conditions that influence them.
Firing Stable Passivation Layers for the Front and Rear Side of High Efficiency N-Type Back-Contact Back-Junction Solar Cells
Creators: name: Woehl, R.
name: Mack, S.
name: Kohn, N.
name: Preu, R.
name: Biro, D.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Wafer-Based Silicon Solar Cells and Materials Technology
Mono- and Multicrystalline Silicon Materials and Cells

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 2272-2276
description: Front and rear surface passivation layers on n-type Si were analyzed that can be implemented in a high
efficiency back-contact back-junction solar cell. The front surface features a phosphorus diffused layer which is
passivated with a thin thermal oxide and an antireflection silicon nitride layer. In order to assess the quality of the
oxide of the newly developed oxidation processes of the Photovoltaic Technology Evaluation Center (PV-TEC), they
were compared to the thin oxide films fabricated at the clean room. For the rear side, different passivation layers and
stacks were compared to each other. In addition to the firing stability, the spiking behavior of aluminum paste was
investigated. The lowest surface saturation current densities after firing and annealing reached were
J0s,front = 61 fA/cm2 on a textured surface for the front side and J0s,rear = 17 fA/cm2 on a plane surface for the rear side,
which results in Voc limit,front = 681 mV and Voc,limit,rear = 714 mV respectively.
Antenatal steroid treatment reduces childhood asthma risk in very low birth weight infants without bronchopulmonary dysplasia
Creators: name: Hung, Yi-Li
name: Hsieh, Wu-Shiun
name: Chou, Hung-Chieh
name: Yang, Yao-Hsu
name: Chen, Chien-Yi
name: Tsao, Po-Nien
Publisher: name: Kooperation de Gruyter
Year: 2009

description: Bronchopulmonary dysplasia (BPD) and very low birth weight (VLBW) are associated with increased incidences of asthma and pulmonary dysfunction in childhood. However, no studies exist which examine asthma risk factors in children who were VLBW infants and did not have BPD. To address this issue, we assessed the asthma incidence and risk factors for asthma in 117 children (approximate mean age of 5 years) who were VLBW [<1500 g, mean gestational age (GA): 30 weeks] infants without BPD. The risk factors were both perinatal (such as steroid treatment, mechanical ventilation, surfactant treatment) and environmental (parental smoking, pet adoption, etc). The asthma incidence was 18.8%. Following multivariate analysis, it was determined that a family history of atopy was a strong risk factor for childhood asthma. Maternal antenatal steroid treatment was associated with a significantly reduced risk for asthma. GA and birth weight were not predictive of childhood asthma. These findings indicate that a history of familial atopy and antenatal steroid treatment are positively and negatively associated (independent of BPD) with childhood asthma in VLBW infants. The finding regarding antenatal steroid treatment warrants more extensive investigations.
CS-TGN: Community Search via Temporal Graph Neural Networks
Creators: name: Hashemi, Farnoosh
name: Behrouz, Ali
name: Hajidehi, Milad Rezaei
Publisher: name: arXiv
Year: 2023
Subjects: subject: Social and Information Networks (cs.SI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Searching for local communities is an important research challenge that allows for personalized community discovery and supports advanced data analysis in various complex networks, such as the World Wide Web, social networks, and brain networks. The evolution of these networks over time has motivated several recent studies to identify local communities in temporal networks. Given any query nodes, Community Search aims to find a densely connected subgraph containing query nodes. However, existing community search approaches in temporal networks have two main limitations: (1) they adopt pre-defined subgraph patterns to model communities, which cannot find communities that do not conform to these patterns in real-world networks, and (2) they only use the aggregation of disjoint structural information to measure quality, missing the dynamic of connections and temporal properties. In this paper, we propose a query-driven Temporal Graph Convolutional Network (CS-TGN) that can capture flexible community structures by learning from the ground-truth communities in a data-driven manner. CS-TGN first combines the local query-dependent structure and the global graph embedding in each snapshot of the network and then uses a GRU cell with contextual attention to learn the dynamics of interactions and update node embeddings over time. We demonstrate how this model can be used for interactive community search in an online setting, allowing users to evaluate the found communities and provide feedback. Experiments on real-world temporal graphs with ground-truth communities validate the superior quality of the solutions obtained and the efficiency of our model in both temporal and interactive static settings.
description: This is the author's version of the paper. Published in companion proceedings of the ACM Web Conference 2023 (WWW '23 Companion)
High Growth Rate MOVPE for Triple Junction Solar Cells
Creators: name: Ebert, C.
name: Pulwin, Z.
name: Dyer, D.
name: Schmieder, K.
name: Haughn, C.
name: Doty, M.
name: Barnett, A.
name: Lu, F.
Publisher: name: WIP
Year: 2011
Subjects: Advanced Photovoltaics : New Concepts and Ultra-High Efficiency
Terrestrial Concentrator Systems

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 613-616
description: Metal organic vapor phase epitaxy (MOVPE) is the technology of choice for high volume manufacture
of high efficiency triple junction solar cells (TJSC) for space and concentrator photovoltaic (CPV) applications.
Advantages of MOVPE include high material quality and process control, as well as, high wafer throughput and lower
cost of ownership compared to other III-V epitaxial technologies. To further reduce the cost of TJSC wafers, we have
investigated the use of very high growth rates of InGaAs(~ 28 μ/hr) and InGaP (~ 3.5 μ/hr) using a production scale
Veeco K475 MOVPE reactor. In this paper, we show that high growth rates can be achieved without gas phase prereactions
and can reduce TJSC epitaxial process times by over 50% leading to increased throughput and lower wafer
cost without degradation of material quality and device performance. Our results compare material measurements of
bulk layers of InGaAs and InGaP grown at fast growth rate to bulk layers grown at standard growth rates (InGaAs
grown at ~ 14 μ/hr and InGaP grown at 2.7 μ/hr). Analytical tests completed for this material comparison are
secondary ion mass spectroscopy (SIMS), x-ray, photoluminescence (PL) , atomic force microscopy (AFM), and time
resolved photoluminescence (TRPL) data. These results show that higher growth rate materials have nominally the
same material characteristics as standard growth rate materials. In addition to bulk material characterization, triple
junction solar cell wafers were produced using high growth rate MOVPE and reflectometry and deflectometery
measurements obtained by in situ optical probe during growth were made. In situ deflectometry measures wafer
curvature during growth of the TJSC wafers and these data show flat, near zero curvature at growth temperature
indicating strain free material growth. Solar cells without anti reflection coatings were fabricated and tested from these
wafers and compared to standard growth rates cells at AM1.5 conditions. These device results show similar cell
performance for basic cell parameters such as fill factor and open circuit voltage. Lowering the cost of triple junction
solar cells is key to reducing module cost and increasing the adoption of CPV technology for solar electricity.