cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Novel MPPT Algorithm Based on Individual PV Panel Monitoring System
Creators: name: Guerriero, P.
name: Daliento, S.
name: Gargiulo, M.
name: D'Alessandro, V.
name: Farese, L.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Components for PV Systems
Balance of System Components

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 4451-4453
description: The management of the power provided by a PV system can be effectively improved if local
information about the operation of single panels are available.
In this work a novel Maximum Power Point Tracking (MPPT) algorithm that exploits the knowledge of the actual
operating condition of each solar panel of the PV array to track the maximum power point of the array independently
of possible mismatching, e.g., caused by local shadowing, among solar panels, is presented. In order to collect
information about the operating point of a solar panel connected in series with other panels, as part of a PV array
system, a distributed wireless sensor network is proposed. A reduction of more than 50% in convergence time (when
mismatching occurs) was observed by applying the new algorithm.
The surface age of Sputnik Planum, Pluto, must be less than 10 million years
Creators: name: Trilling, David E.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Data from the New Horizons mission to Pluto show no craters on Sputnik Planum down to the detection limit (2 km for low resolution data, 625 m for high resolution data). The number of small Kuiper Belt Objects that should be impacting Pluto is known to some degree from various astronomical surveys. We combine these geological and telescopic observations to make an order of magnitude estimate that the surface age of Sputnik Planum must be less than 10 million years. This maximum surface age is surprisingly young and implies that this area of Pluto must be undergoing active resurfacing, presumably through some cryo-geophysical process. We discuss three possible resurfacing mechanisms and the implications of each one for Pluto's physical properties.
description: 6 pages; 1 figure; in press at PLOS ONE
The Implications of Extreme Outflows from Extreme Starbursts
Creators: name: Heckman, Timothy M.
name: Borthakur, Sanchayeeta
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Interstellar ultraviolet absorption-lines provide crucial information about the properties of galactic outflows. In this paper, we augment our previous analysis of the systematic properties of starburst-driven galactic outflows by expanding our sample to include a rare population of starbursts with exceptionally high outflow velocities. In principle, these could be a qualitatively different phenomenon from more typical outflows. However, we find that instead these starbursts lie on, or along the extrapolation of, the trends defined by the more typical systems studied previously by us. We exploit the wide dynamic range provided by this new sample to determine scaling relations of outflow velocity with galaxy stellar mass (M*), circular velocity, star-formation rate (SFR), SFR/M*, and SFR/area. We argue that these results can be accommodated within the general interpretational framework we previously advocated, in which a population of ambient interstellar or circum-galactic clouds is accelerated by the combined forces of gravity and the momentum flux from the starburst. We show that this simple physical picture is consistent with both the strong cosmological evolution of galactic outflows in typical star-forming galaxies and the paucity of such galaxies with spectra showing inflows. We also present simple parameterizations of these results that can be implemented in theoretical models and numerical simulations of galaxy evolution.
description: 7 pages, 2 figures, 2 tables. Accepted for publication in ApJ
Local Al-Alloyed Contacts for Next Generation Si Solar Cells
Creators: name: Uruena De Castro, A.
name: John, J.
name: Beaucarne, G.
name: Choulat, P.
name: Eyben, P.
name: Agostinelli, G.
name: Van Kerschaver, E.
name: Poortmans, J.
name: Mertens, R.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Wafer-based Silicon Solar Cells and Materials Technology
Mono- and Multicrystalline Silicon Materials and Cells

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 1483-1486
description: Driven by further decreasing the price per watt peak to reach grid parity, the crystalline silicon solar
cells roadmap is moving towards thinner wafers while further increasing the efficiency. While 200 ;m is the standard
thickness used in industrial solar cell production today, solar cells on silicon wafers down to 80 μm are being
developed.
The influence of rear-side surface recombination on the losses of the solar cell is increasing by going to thinner
silicon wafer. In order to decrease this rear-side recombination, new solar cell processes with back-side passivation
by a dielectric layer and locally Al-alloyed contacts are being developed. One promising approach involves the local
opening of the passivation layer by laser ablation, blanket deposition of Al, and a short thermal anneal. In this paper,
we studied the local Al-alloyed contacts formed in this way.
We showed that Si dissolution is an important issue and we gave a qualitative explanation for the observed contact
structures. Applying dielectric passivation and local Al back surface field (Al-BSF), superior results on very thin
multicrystalline (mc) and mono Si solar cells have been reported recently, like 16.6% efficiency on 80 ;m thick, 78
cm2 CZ-Si (4.3 cm) [3].
Νευρωνικά δίκτυα και εφαρμογές αυτών για την πρόβλεψη τιμής Bitcoin
Creators: name: Κοτταρίδης, Αθανάσιος
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2023
Subjects: subject: Bitcoin
subject: Large-scale application
subject: Machine learning
subject: Time Series
subject: Neural Networks

description: Η πρόβλεψη της τιμής του Bitcoin αποτελεί μια πρόκληση που έχει απασχολήσει μεγάλο μέρος της ερευνητικής κοινότητας τα τελευταία χρόνια. Ο στόχος της παρούσας ερευνητικής εργασίας είναι η δημιουργία μίας κατανεμημένης εφαρμογής που πραγματοποιεί βραχυπρόθεσμη πρόβλεψη της τιμής του Bitcoin σε πραγματικό χρόνο, χρησιμοποιώντας τεχνικές μηχανικής μάθησης, ανάλυσης φυσικής γλώσσας και εξαγωγής συναισθημάτων από αναρτήσεις που έχουν πραγματοποιηθεί στο reddit σχετικά με το Bitcoin. Η εφαρμογή συλλέγει δεδομένα κάθε λεπτό σχετικά με την τιμή του Bitcoin από διάφορες πήγες, τα επεξεργάζεται και τα αποθηκεύει. Στην συνέχεια χρησιμοποιούνται τεχνικές Deep Learning και Νευρωνικών Δικτύων προκειμένου να εξετάσουμε την προβλεψιμότητα της τιμής του Bitcoin σε χρονικούς ορίζοντες που κυμαίνονται από 1 έως 60 λεπτά. Για την εξαγωγή αποτελεσμάτων πραγματοποιήθηκε πρόβλεψη χρησιμοποιώντας multivariate και univariate LSTM μοντέλα τα οποία στη συνέχεια συγκρίναμε με το μοντέλο ARIMA. Τα αποτελέσματα της σύγκρισης έδειξαν ότι το multivariate LSTM αποδίδει πιο ακριβής προβλέψεις.
Light Trapping Properties of Cylindrical Well Diffraction Gratings in Solar Cells: Computational Calculations
Creators: name: Mellor, A.
name: Tobías Galicia, I.
name: Martí Vega, A.
name: Luque, A.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Advanced Photovoltaics: New Concepts and Ultra-high Efficiency
New Materials, Cells and Modules

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 647-649
description: Light trapping using diffraction gratings is a promising approach to increasing absorption in solar
cells. In this paper, the computationally calculated absorption enhancement expected from a diffraction grating
consisting of a triangular array of cylindrical wells is presented. Angle-extended polychromatic illumination is
considered, and special attention is paid to absorption of sub-bandgap photons in an intermediate band solar cell.
Results are compared to the absorption enhancement expected from an ideal Lambertian (randomizing) scatterer,
which is considered as a baseline. It is found that for cells which absorb very weakly, the diffraction grating
provides absorption enhancement above that of the ideal Lambertian scatterer over a wide wavelength range. For
cells which absorb more strongly, the grating underperforms the ideal Lambertian scatterer over almost all
wavelengths. Finally, the grating period, well height and well radius are optimised.
Study of Reduced the P/I Interface Boron Contamination in Single PECVD Chamber Deposition Multicrystalline Silicon Solar Cells
Creators: name: Zhang, X.D.
name: Sun, F.H.
name: Wang, G.H.
name: Xu, S.Z.
name: Yue, Q.
name: Wei, C.
name: Sun, J.
name: Zhang, D.K.
name: Hou, G.F.
name: Geng, X.
name: Xiong, S.
name: Zhao, Y.
Publisher: name: WIP-Munich
Year: 2008
Subjects: Thin Films
Amorphous and Microcrystalline Silicon

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 2297-2300
description: We studied the boron contamination at the interface between the p and i layers of μc-Si:H solar cells deposited in a single-chamber PECVD system. The boron depth profile in the i layer was measured by Secondary Ion Mass Spectroscopy. We founded that the mixed-phase μc-Si:H materials with 40% crystalline volume fraction is easy to be affected by the residual boron in the reactor. The experimental results showed that both a 500-nm thick μc-Si:H covering layer and a 30 seconds of hydrogen plasma treatment can effectively reduce the boron contamination at the p/i interface. However, from cost reduction point of view, the hydrogen plasma treatment is desirable for solar cell manufacture because the substrate is not moved during the hydrogen plasma treatment.
Development of Low-Cost Plated Contact Solar Cells Using a Screen Printed Dielectric Etching Paste
Creators: name: Renshaw, J.
name: Ebong, A.
name: Ramanathan, S.
name: Cooper, I.B.
name: Tate, K.
name: Rohatgi, A.
name: Köhler, I.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Wafer-based Silicon Solar Cells and Materials Technology
Mono- and Multicrystalline Silicon Materials and Cells

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 1487-1490
description: A solar cell fabrication method involving a screen printed dielectric etching paste and Ni/Ag plated
contacts is described. The via’s opened with the etching paste are clean enough to be plated with electroless Ni
followed by light induced Ag plating. This front contact method achieves a specific contact resistivity of 120 μΩ-
cm2 on a lightly doped emitter with a surface concentration of 2 x 1019 /cm3 while screen printing can only achieve a
value of 2300 μΩ-cm2 on the same emitter. An efficiency of 18.4% has been attained in this work.
Inkjet Fabrication of Shallow Emitters in Silicon Solar Cells
Creators: name: Tormey, E.
name: Prokopiak, S.
name: Khaselev, O.
name: Marczi, M.
name: Raut, R.
name: Singh, B.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Advanced Photovoltaics: New Concepts and Ultra-high Efficiency
New Materials, Cells and Modules

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 608-611
description: Ink jet printing has emerged as an attractive method for solar cell fabrication with industry trends
towards the use of thinner and more fragile silicon and finer conductor features. It is both a non-contact and fine
feature printing method. Presented here are ink jettable dopant and etchant materials and a stencil printable etchant
paste suitable for forming shallow/selective emitter crystalline solar cells. Cookson is working closely with Trident
Industrial Ink Jet in this development effort. Jettability of the inks was tested with both a Dimatix printer and Trident
industrial print heads. All inks were ink jetted onto pc-Si samples with or without SiNx ARC coating, processed and
tested.
Primordial gravity wave background anisotropies
Creators: name: Alba, Vasyl
name: Maldacena, Juan
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We consider the primordial gravity wave background produced by inflation. We compute the small anisotropy produced by the primordial scalar fluctuations.
description: 5 pages, 2 figures, references corrected
Synthesis of Germanium Nano-Crystals Using a Nanocluster Source
Creators: name: Parola, S.
name: Quesnel, E.
name: Muffato, V.
name: Guetaz, L.
name: Raccurt, O.
name: Slaoui, A.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Advanced Photovoltaics: New Concepts and Ultra-high Efficiency
New Materials, Cells and Modules

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 622-626
description: Recent advances in next generation solar cells are aiming at developing multi-bandgap structures based on
quantum dots. For that purpose, numerous studies are interested in producing Si or Ge nano-crystals (NCs) but the
reported fabrication processes at high temperature do not suit well the solar cells applications.
Here, we report on the synthesis of Ge-NCs by means of a nanocluster source working room temperature. The control of
the mean NCs size and size dispersion (± 13.2 %) was ensured by the source parameters in combination with an in-situ
mass spectrometer. HRTEM observations evidenced nicely crystallized Ge NCs. Thus, first Ge NCs-alumina
nanocomposite materials have been fabricated that exhibit a quantum confinement effect. PL spectroscopy measurements
revealed a visible emission corresponding to a NCs bandgap of 2.88eV.
Weak-Light Irradiation on BIPV-Applications Results of the Project MULTIELEMENT
Creators: name: Misara, S.
name: Glotzbach, T.
name: Schulz, B.
name: Biswas, P.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Components for PV Systems
PV System Engineering and Standards, Socio-economic Aspects, and Sustainability

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 4801-4805
description: Due to different orientations, the solar radiation in the weak light range plays a major role in BIPV
applications. However, measurements for all common orientations of BIPV are rarely available. Therefore it is
useful to apply slope irradiance models to estimate the irradiation on arbitrary alignments. Four slope irradiance
models are taken into account; Jordan, Klucher, Reindl and Hay. In order to check the accuracy of these models,
a validation with data of the ISETSensor Global is performed. The Hay model turns out to show the best results.
By the calculation of weighting factors the energetic relevance of different irradiation levels can be evaluated.
Using a new defined European Efficiency, the weighting factor of the weak-light range (G=0 W/m² - 375 W/m²)
is 23 % [12]. However, for non optimal orientations, which are typical for BIPV, the weighting factors can reach
up to 47% at maximum.
Novel Flexible Electronic Photovoltaic Array Emulator
Creators: name: Entwistle, R.
name: Bleijs, J.A.M.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Components for PV Systems
Balance of System Components

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 4416-4420
description: Cell mismatch effects are one of the major problems in photovoltaic (PV) system development. Until per
cell distributed maximum power point tracking (MPPT) systems are developed, MPPT algorithms used in system
components need to be able to deal with multiple local maxima arising from mismatch. An accurate repeatable method of
testing MPPT algorithms that can be used in a laboratory is required. A flexible electronic PV array emulator is being
developed for this. It will combine a MATLAB array simulation programme with controlled power electronics using an
ARM processor as the interface. It will be able to accurately emulate the output characteristic of an array under
illumination conditions set per module by the user.
Interplay of bias-driven charging and the vibrational Stark effect in molecular junctions
Creators: name: Li, Yajing
name: Zolotavin, Pavlo
name: Doak, Peter
name: Kronik, Leeor
name: Neaton, Jeffrey B.
name: Natelson, Douglas
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We observe large, reversible, bias driven changes in the vibrational energies of PCBM, based on simultaneous transport and surface-enhanced Raman spectroscopy (SERS) measurements on PCBM-gold junctions. A combination of linear and quadratic shifts in vibrational energies with voltage is analyzed and compared with similar measurements involving C60-gold junctions. A theoretical model based on density functional theory (DFT) calculations suggests that both a vibrational Stark effect and bias-induced charging of the junction contribute to the shifts in vibrational energies. In the PCBM case, a linear vibrational Stark effect is observed due to the permanent electric dipole moment of PCBM. The vibrational Stark shifts shown here for PCBM junctions are comparable to or larger than the charging effects that dominate in C60 junctions.
description: 16 pages, 4 figures
Efficient Pure State Quantum Tomography from Five Orthonormal Bases
Creators: name: Carmeli, Claudio
name: Heinosaari, Teiko
name: Kech, Michael
name: Schultz, Jussi
name: Toigo, Alessandro
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: For any finite dimensional Hilbert space, we construct explicitly five orthonormal bases such that the corresponding measurements allow for efficient tomography of an arbitrary pure quantum state. This means that such measurements can be used to distinguish an arbitrary pure state from any other state, pure or mixed, and the pure state can be reconstructed from the outcome distribution in a feasible way. The set of measurements we construct is independent of the unknown state, and therefore our results provide a fixed scheme for pure state tomography, as opposed to the adaptive (state dependent) scheme proposed by Goyeneche et al. in [Phys. Rev. Lett. 115, 090401 (2015)]. We show that our scheme is robust with respect to noise in the sense that any measurement scheme which approximates these measurements well enough is equally suitable for pure state tomography. Finally, we present two convex programs which can be used to reconstruct the unknown pure state from the measurement outcome distributions.
description: 5 pages, 2 figures, 1 page of supplemental material
Faddeev-type calculation of (d,n) transfer reactions in three-body nuclear systems
Creators: name: Deltuva, A.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Exact Faddeev-type three-body equations are applied to the study of the proton transfer reactions $(d,n)$ in the system consisting of a nuclear core and two nucleons. The integral equations for the three-body transition operators are solved in the momentum-space framework including the Coulomb interaction via the screening and renormalization method. For a weakly bound final nucleus the calculation of the $(d,n)$ reaction is more demanding in terms of the screening radius as compared to the $(d,p)$ reaction. Well converged differential cross section results are obtained for $^{7}{Be}(d,n)^{8}{B}$, $^{12}{C}(d,n)^{13}{N}$, and $^{16}{O}(d,n)^{17}{F}$ reactions. A comparison with the corresponding $(d,p)$ reactions is made. The calculations fail to reproduce the shape of the angular distribution for reactions on $^{12}{C}$ but provide quite successful description for reactions on $^{16}{O}$, especially for the transfer to the $^{17}{F}$ excited state $1/2^+$ when using a nonlocal optical potential.
description: 7 pages, 7 figures, to be published in Phys. Rev. C
Ανάπτυξη προηγμένου πληροφοριακού συστήματος κατά DevOps για τη διεργασία εξέτασης και διάγνωσης ασθενών σε κέντρο υγείας
Creators: name: Σεισάκη, Δήμητρα
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2023
Subjects: subject: Πληροφοριακά συστήματα
subject: Διεργασία
subject: Κέντρο υγείας
subject: DevOps

description: Τα τελευταία χρόνια είναι υψίστης σημασίας κάθε οργανισμός να διαθέτει ένα σύγχρονο πληροφοριακό σύστημα που να εστιάζει στη δομή και τους εργαζόμενούς του. Η ανάγκη για γρήγορη προσαρμοστικότητα, παραγωγικότερες πρακτικές, ταχύτερη ανταπόκριση στις απαιτήσεις και λιγότερη γραφειοκρατία, έφεραν στο προσκήνιο την ανάπτυξη ευέλικτων μεθόδων (Agile Methodology) οι οποίες παρέχουν τη δομή και τη μεθοδολογία για την ανάπτυξη λογισμικού. Δίνεται μεγαλύτερη έμφαση στην έννοια του DevOps που παρέχει τις πρακτικές και τα εργαλεία για την αυτοματοποίηση και ολοκλήρωση των διαδικασιών ανάπτυξης και παράδοσης του λογισμικού πληροφοριακού συστήματος, με βασική προτεραιότητα τη μέγιστη ικανοποίηση του πελάτη. Παράλληλα, παρατίθεται ανάλυση των κέντρων υγείας ως μία μορφή παροχής ιατρικής περίθαλψης η οποία είναι στελεχωμένη με γενικούς ιατρούς και ιατρούς ορισμένων ειδικοτήτων που προσφέρουν βασικές υπηρεσίες φροντίδας όπως η πραγματοποίηση προληπτικών εξετάσεων, η διεξαγωγή διαγνωστικής διαδικασίας και η καταλληλότερη θεραπευτική αγωγή για τον ασθενή. Στο αρχικό τμήμα της παρούσας εργασίας περιγράφονται περαιτέρω οι ανωτέρω έννοιες, ενώ στη συνέχεια αναλύεται η διαδικασία που αφορά την εξέταση του ασθενούς σε ένα κέντρο υγείας και την παραλαβή του ιατρικού ιστορικού του, καθώς και η ανάπτυξη της εφαρμογής που χρησιμοποιεί ο ιατρός για την εισαγωγή των δεδομένων εξέτασης του ασθενούς.
A Novel High Performance Aqueous Carrier for Wafering Applications
Creators: name: Naguib Sant, N.
name: Grumbine, S.
name: Barros, C.
name: Rios, J.
name: Jones, L.
name: Riyanto, N.
name: Gaudet, G.
name: Batllo, F.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Wafer-based Silicon Solar Cells and Materials Technology
Silicon Feedstock, Crystallisation and Wafering

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 1207-1210
description: Polyethylene glycol (PEG) or oil-derived fluids are currently the carriers typically used for slurries in wafering
applications. Although both PEG and oil based vehicles offer good lubricating performance, they also offer poor thermal and
environmental properties that impede their use for the sawing of thin wafers. We have developed a novel high performance
aqueous carrier as an environmental friendly alternative to PEG and oil. This aqueous carrier offers low wire wear, low kerf
loss and low cutting temperatures, which could in turn enable thinner wafers and reduce power consumption. This work
focuses on the mechanistic understanding of the aqueous carrier properties and how these properties affect sawing
performance. The slurry film thickness before and after entering the cutting zone is investigated with both PEG based slurry
and aqueous slurry. Interaction and coating behaviors between the carrier, the abrasive and the wire are presented.
Hidden-charm Pentaquark States in Heavy Ion Collisions at the Large Hadron Collider
Creators: name: Wang, Rui-Qin
name: Song, Jun
name: Sun, Kai-Jia
name: Chen, Lie-Wen
name: Li, Gang
name: Shao, Feng-Lan
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In the framework of the quark combination, we derive the yield formulas and study the yield ratios of the hidden-charm pentaquark states in ultra-relativistic heavy ion collisions. We propose some interesting yield ratios which clearly exhibit the production relationships between different hidden-charm pentaquark states. We show how to employ a specific quark combination model to evaluate the yields of exotic $P_c^+(4380)$, $P_c^+(4450)$ and their partners on the basis of reproducing the yields of normal identified hadrons, and execute the calculations in central Pb+Pb collisions at $\sqrt{s_{NN}}= 2.76$ TeV as an example.
Tracking Mechanism for a Group of Photovoltaic Modules
Creators: name: Tatu, I.N.
name: Alexandru, C.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Components for PV Systems
Balance of System Components

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 4424-4428
description: With the growth of photovoltaic (PV) systems around the world, various strategies to maximize the
energy output of a group of PV modules have been developed. One of them is tracking the modules following the
paths of the Sun. The simultaneous orientation of a group of PV modules improves the system`s economic and
energetic efficiency by minimizing the number of motor sources (most expensive part of a tracking system). The
tracking mechanism is developed using the conceptual design technique through multibody systems method and
multi-criteria analysis. The resulting solution is modeled (in mechatronic concept) using a virtual prototyping
platform which comprises the softwares: CATIA (for the solid model), ADAMS/View (for the mechanical structure),
ADAMS/Controls & MATLAB/Simulink (for the control system). The motion law is elaborated for significant days
of the year aiming to determine the angular field of the motion and number of actuating operations.
Sick, the spectroscopic inference crank
Creators: name: Casey, Andrew R
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: There exists an inordinate amount of spectral data in both public and private astronomical archives which remain severely under-utilised. The lack of reliable open-source tools for analysing large volumes of spectra contributes to this situation, which is poised to worsen as large surveys successively release orders of magnitude more spectra. In this Article I introduce sick, the spectroscopic inference crank, a flexible and fast Bayesian tool for inferring astrophysical parameters from spectra. sick can be used to provide a nearest-neighbour estimate of model parameters, a numerically optimised point estimate, or full Markov Chain Monte Carlo sampling of the posterior probability distributions. This generality empowers any astronomer to capitalise on the plethora of published synthetic and observed spectra, and make precise inferences for a host of astrophysical (and nuisance) quantities. Model intensities can be reliably approximated from existing grids of synthetic or observed spectra using linear multi-dimensional interpolation, or a Cannon-based model. Additional phenomena that transform the data (e.g., redshift, rotational broadening, continuum, spectral resolution) are incorporated as free parameters and can be marginalised away. Outlier pixels (e.g., cosmic rays or poorly modelled regimes) can be treated with a Gaussian mixture model, and a noise model is included to account for systematically underestimated variance. Combining these phenomena into a scalar-justified, quantitative model permits precise inferences with credible uncertainties on noisy data. Using a forward model on low-resolution, high S/N spectra of M67 stars reveals atomic diffusion processes on the order of 0.05 dex, previously only measurable with differential analysis techniques in high-resolution spectra. [abridged]
description: Accepted to ApJS
Comparative Analysis of Crystallization of Si ELO Layers Obtained in Temperature Gradient and by Standard LPE Method for Photovoltaic Application
Creators: name: Olchowik, J.M.
name: Cieslak, K.
name: Gulkowski, S.
name: Józwik, I.
name: Mucha, J.
name: Fave, A.
name: Kaminski, A.
Publisher: name: WIP-Munich
Year: 2008
Subjects: Thin Films
Thin Film Crystalline Silicon

description: 23rd European Photovoltaic Solar Energy Conference and Exhibition, 1-5 September 2008, Valencia, Spain; 2199-2201
description: Recently, more than 90% of PV technology is based on silicon. A very important aspect of
commonness of photovoltaic solutions in the world is the reduction of the production costs of final products by minimization
of the amount of materials used. Unfortunately, Si as the indirect band gap semiconductor does not have good conditions for
solar light absorption, so to increase an efficiency of PV conversion, it needs more bulk substrates. The use of classic thin
film layers technology, from this point of view is not rational. However, it is possible to solve this problem by ELO
(epitaxial lateral overgrowth) application, increasing optical path of solar light.
In our investigation the liquid phase epitaxy (LPE) technology was applied. This work presents the results of ELO
layers crystallization by means of standard (horizontal) LPE method and in temperature gradient field (vertical variant). In
vertical variant, the two-zone furnace (TransTemp Company) was used. Experiments were conducted in H2 and Ar
atmosphere.
A Simple but Effective Approach to the Site Assessment for PV Plants: The Simulation Program SunSim
Creators: name: Groppi, F.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Components for PV Systems
PV System Engineering and Standards, Socio-economic Aspects, and Sustainability

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 4792-4796
description: Nowadays, many programs for the site assessment of PV plants are available on the market. Many
of them are quite powerful and reliable but in some cases their use is complex and may require many data to be
introduced. On the opposite, other programs are very simple but they do not take into account many important
aspects, for instance the shadowing and the effects of the albedo. Therefore, a question raises: it is possible to
develop a program, easy to understand, which in less than a couple of minutes may assess the productivity of a
site by taking into account the PV geometry (tilt and azimuth of PV modules), the shadowing (obstructions), the
surrounding landscape (albedo) and the maximum angle of incidence of the sun beam on the front glass? The
program SunSim is the result of an effort aimed to meet these requirements and therefore all the operations (with
the exception of the filename typing) may be performed by using only the mouse. The data base for the sun
radiation includes 173 sites of Italy, Europe and North Africa. The graphical approach allows to select the tilt and
azimuth of PV modules by moving the mouse on the sun-path diagram. In the last release the program allows the
calculation of the energy yield for double-axes tracking systems.
Worte der Erinnerung gesprochen bei der Beerdigung von Professor Dr. theol. Gustav von Schulthess Rechberg am 7. Juli 1916
Creators: name: (:Unkn) Unknown
Publisher: name: Zentralbibliothek Zürich
Year: 1916
Subjects: subject: 230 Christentum, christliche Theologie
subject: 920 Biografien, Genealogie, Insignien
subject: Nachruf
subject: Schulthess-Rechberg, Gustav von

description: Enthält: Abdankungsrede, gehalten von Pfarrer A. Rüegg, Professor; Worte, gesprochen von Herrn Kirchenratspräsident Herold; Abschiedswort von C. Pestalozzi, Pfarrer in St. Gallen; Worte am Grabe, gesprochen vom Dekan der theologischen Fakultät, Herrn Prof. Dr. L. Köhler; In Memoriam von Herrn Prof. Dr. G. von Schulthess Rechberg, von Alex. Nüesch, Pfr.; Gustav von Schulthess Rechberg, Nekrolog in der Neuen Zürcher Zeitung von W. K.
Improved c-Si Cell Performance through Metallizations Adapted to Reduce Recombination Effects
Creators: name: Laudisio, G.
name: Willmott, P.J.
name: Rose, M.
name: Young, R.J.S.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Wafer-based Silicon Solar Cells and Materials Technology
Mono- and Multicrystalline Silicon Materials and Cells

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 1446-1448
description: The solar conversion efficiency of photovoltaic cells is affected by recombination effects. SiNx, SiO2
or other passivation layers deposited on the front side of the solar cells act as both anti-reflective coating and as
passivation layer to prevent recombination effects. The removal of this layer during firing to allow electrical contact
between the cell and the electrode reduces its passivation effect. This works develops the approach based on
decoupling the screen printing of fingers and busbars allowing the optimization of the metallization pastes for each
decoupled element of the front side grid. The performance of a paste specifically designed for busbars is reported,
that provides excellent adhesion properties, increased conductivity and higher Voc.
Nanocrystals of Oxides Y3Al5O12 (YAG), Gd3Ga5O12 (GGG) and Y2O3 (YO) Prepared via Sol-Gel Method for Luminescent Solar Concentrators
Creators: name: Lipinska, L.
name: Baran, M.
name: Sarnecki, J.
name: Nakielska, M.
name: Kozlowska, A.
name: Diduszko, R.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Advanced Photovoltaics: New Concepts and Ultra-high Efficiency
New Materials, Cells and Modules

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 599-602
description: The nanocrystals of Y3Al5O12 (YAG), Gd3Ga5O12 (GGG) and Y2O3 (YO) compounds were prepared
via (Pechini) modified sol-gel method. Mentioned oxides were co-doped by 3% Nd and 15% Yb rare ions. Structure
and optical properties of nanopowders were investigated and compared. The crystal structures of samples were
characterized by X-ray diffraction (XRD) method. The size and morphology of nanopowders were analyzed by
scanning electron microscopy (SEM). The obtained nanopowders had crystalline structure as confirmed by XRD and
were single phase. The mean size of the crystallites was evaluated using Scherrer formula. It varied from 10 to 70
nm. Spectroscopic properties of YAG, GGG and YO nanopowders were compared with their single crystal
counterparts. The results of spectroscopic and emission dynamic studies prove the usefulness of co-doped
nanocrystals for application in Luminescent Solar Concentrators. Recently, the YAG, GGG, YO nanocrystals codoped
by Nd and Yb ions were dispersed in polymer matrix in order to obtain luminescent composites which may
compete with polymers doped by organic dyes.
On the Correct Estimate of the Probability of False Detection of the Matched Filter in Weak-Signal Detection Problems
Creators: name: Vio, Roberto
name: Andreani, Paola
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The detection reliability of weak signals is a critical issue in many astronomical contexts and may have severe consequences for determining number counts and luminosity functions, but also for optimising the use of telescope time in follow-up observations. Because of its optimal properties, one of the most popular and widely-used detection technique is the matched filter (MF). This is a linear filter designed to maximise the detectability of a signal of known structure that is buried in additive Gaussian random noise. In this work we show that in the very common situation where the number and position of the searched signals within a data sequence (e.g. an emission line in a spectrum) or an image (e.g. a point-source in an interferometric map) are unknown, this technique, when applied in its standard form, may severely underestimate the probability of false detection. This is because the correct use of the MF relies upon a-priori knowledge of the position of the signal of interest. In the absence of this information, the statistical significance of features that are actually noise is overestimated and detections claimed that are actually spurious. For this reason, we present an alternative method of computing the probability of false detection that is based on the probability density function (PDF) of the peaks of a random field. It is able to provide a correct estimate of the probability of false detection for the one-, two- and three-dimensional case. We apply this technique to a real two-dimensional interferometric map obtained with ALMA.
description: Accepted for publication by A&A
Research and Implement Solutions to Tackle Security Threats in Surgical Robotics
Creators: Sruthi Vallabhaneni
Publisher: name: University of Alberta Library
Year: 2023

The security of surgical robotics systems needs to be ensured given the growing usage of technology in healthcare. Cybersecurity risks can potentially compromise the surgical robotics systems' availability, confidentiality, and integrity, with severe repercussions for patients and medical professionals.

An overview of the security concerns relating to surgical robotics and the steps that can be taken to improve their security is provided in this abstract. The concerns connected to surgical robotics are discussed in the report, including hacking, data breaches, and cyberattacks. The document also gives a general review of the security procedures that are currently in place, including access control, authentication, and encryption.

The report also highlights the significance of establishing safety precautions at several levels, including network, hardware, and software. The report emphasizes the necessity of routine vulnerability scanning.

The confidentiality, integrity, and availability of surgical robotics systems must all be guaranteed, which means that security must be provided for surgical robotics. To avoid cybersecurity catastrophes that could jeopardize patient safety and public confidence in the healthcare system, healthcare providers and manufacturers must proactively identify and mitigate potential security risks.
Latest Developments in Polyester Films for Thin Film Photovoltaic Applications
Creators: name: Bories-Azeau, X.
name: MacDonald, W.A.
name: Mace, J.M.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Advanced Photovoltaics: New Concepts and Ultra-high Efficiency
New Materials, Cells and Modules

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 603-607
description: The outstanding property set of polyester films has made them an important class of materials for
the photovoltaic industry, continuously offering new opportunities as a plastic substrate for cell construction and
module encapsulation. Initially used as a single component of c-Si module laminate backsheets, polyester films
are now widely incorporated in all-polyester film backsheets, responding to the market’s growing demand for
high performance materials at a lower cost and available in large quantities. Recent advances in polyester films
for flexible electronics combined with innovative product developments for the c-Si photovoltaic industry have
led to the emergence of a number of new polyester films for deposition substrate, frontsheet and backsheet
applications in rigid and flexible thin film modules. DuPont Teijin Films’ portfolio of films under development
for thin film PV includes films with dimensional stability at elevated temperatures, films designed for enhanced
weatherability and low sheet resistance conductive films. Following xenon light exposure for thousands of hours
new weatherable films show exceptional retention of key optical and mechanical properties. Innovative functional
films can be further augmented with superior adhesion performance.
Diamond Wire-Sawn Silicon Wafers – from the Lab to the Cell Production
Creators: name: Bidiville, A.
name: Wasmer, K.
name: Kraft, R.
name: Ballif, C.
Publisher: name: WIP-Munich
Year: 2009
Subjects: Wafer-based Silicon Solar Cells and Materials Technology
Silicon Feedstock, Crystallisation and Wafering

description: 24th European Photovoltaic Solar Energy Conference, 21-25 September 2009, Hamburg, Germany; 1400-1405
description: Wafers for the PV industry are mainly sawn with a multi-wire slurry saw. This process is slow (it takes almost half a
day to complete a cut) and generates a lot of waste: around half the silicon is sawn away and contaminating the slurry,
and the wire is worn and has lost strength. After each cut, the slurry has to be cleaned from the silicon debris and the
wire has to be exchanged. In contrast, sawing the wafers with a diamond-plated wire is faster, requires only a cooling
liquid that is easy to filter from silicon debris and uses a wire that can be kept for several cut. But this new sawing
technique only has a chance to develop if the solar cell production lines developed for slurry sawn wafers is capable
of processing these diamond-plated wire sawn wafers efficiently. This study focused on the differences of surface
properties of wafers cut via a slurry wire-saw and via a diamond-plated wire-saw. From these surface differences, it is
possible to explain the differences in cell processing behaviour and to update the cell production line. Finally, it is
shown that wafers sawn with a diamond-plated wire can give cells that are as efficient as the slurry sawn wafers,
which validates this new diamond-plated wire wafering method for the production of solar cells.
Development of HPLC-Orbitrap method for identification of N-bearing molecules in complex organic material relevant to planetary environments
Creators: name: Gautier, Thomas
name: Schmitz-Afonso, Isabelle
name: Touboul, David
name: Szopa, Cyril
name: Buch, Arnaud
name: Carrasco, Nathalie
Publisher: name: arXiv
Year: 2016
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Although the Cassini Spacecraft and the Huygens lander provided numerous information about Titan atmospheric chemistry and the formation of its aerosols, the exact composition of these aerosols still remains unknown. A fruitful proxy to investigate these aerosols is the use of laboratory experiments that allow producing and studying analogs of Titan aerosol, the so35 called tholins. Even when produced in the laboratory, unveiling the exact composition of the aerosol remains problematic due to the high complexity of the material. Numerous advances have been recently made using high-resolution mass spectrometry (HRMS) (Pernot et al. 2010, Somogyi et al. 2012, Gautier et al. 2014) that allowed the separation of isobaric compounds and a robust identification of chemical species composing tholins regarding their molecular formulae. Nevertheless isomeric species cannot be resolved by a simple mass measurement. We propose here an analysis of tholins by high performance liquid chromatography (HPLC) coupled to HRMS to unveil this isomeric ambiguity for some of the major tholins compounds. By comparing chromatograms obtained when analyzing tholins and chemical standards, we strictly identified seven molecules in our tholins samples: melamine, cyanoguanidine, 6-methyl-1,3,5-triazine-2,4-diamine, 2,4,6-triaminopyrimidine, 3-amino- 1,2,4-triazole, 3,5-Dimethyl-1,2,4-triazole and 2,4-diamino-1,3,5-triazine. Several molecules, including hexamethylenetriamine (HMT) were not present at detectable levels in our sample. The use for the first time of a coupled HPLC-HRMS technique applied to tholins study demonstrated the interest of such a technique compared to single high-resolution mass spectrometry for the study of tholins composition.
Symmetries and deformations in the spherical shell model
Creators: name: Van Isacker, Piet
name: Pittel, Stuart
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We discuss symmetries of the spherical shell model that make contact with the geometric collective model of Bohr and Mottelson. The most celebrated symmetry of this kind is SU(3), which is the basis of Elliott's model of rotation. It corresponds to a deformed mean field induced by a quadrupole interaction in a single major oscillator shell N and can be generalized to include several major shells. As such, Elliott's SU(3) model establishes the link between the spherical shell model and the (quadrupole component of the) geometric collective model. We introduce the analogue symmetry induced by an octupole interaction in two major oscillator shells N-1 and N, leading to an octupole-deformed solution of the spherical shell model. We show that in the limit of large oscillator shells (large N) the algebraic octupole interaction tends to that of the geometric collective model.
description: 23 pages, 7 figures, 2 tables
Line operators from M-branes on compact Riemann surfaces
Creators: name: Amariti, Antonio
name: Orlando, Domenico
name: Reffert, Susanne
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper, we determine the charge lattice of mutually local Wilson and 't Hooft line operators for class S theories living on M5-branes wrapped on compact Riemann surfaces. The main ingredients of our analysis are the fundamental group of the N-cover of the Riemann surface, and a quantum constraint on the six-dimensional theory. This latter plays a central role in excluding some of the possible lattices and imposing consistency conditions on the charges. This construction gives a geometric explanation for the mutual locality among the lines, fixing their charge lattice and the structure of the four-dimensional gauge group.
description: 17 pages, 8 figures
Teflon® FEP Frontsheets for Photovoltaic Modules: Improved Optics Leading to Higher Module Efficiency
Creators: name: Glassmaker, N.J.
name: Samuels, S.L.
name: Lewittes, M.E.
name: Brown, M.J.
name: Andrews, G.A.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Advanced Photovoltaics: New Concepts and Ultra-high Efficiency
New Materials, Cells and Modules

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 614-616
description: Increasing the amount of light that reaches the cell is one approach to improved photovoltaic (PV)
module efficiency. In current designs using weathering layers of glass or poly(co-ethylene-tetrafluoroethylene)
(Teflon® ETFE), some light is lost due to reflection and scattering due to haze. Teflon® FEP, poly(cotetrafluoroethylene-
hexafluoropropylene), offers both a lower index of refraction and higher transparency than
existing front sheet materials for modules, leading to improved efficiency and greater output of current and power. In
precise optical measurements, we show that FEP delivers more light to the underlying PV cells. By modeling the
optical transmission data for front sheets of glass, ETFE, and FEP, one can demonstrate an improvement of 1.5-3% in
short circuit current output when using FEP, depending on the cell technology. Initial module experiments have
confirmed model predictions and demonstrate the power output performance enhancement when using FEP.