cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
FORTRESS: FORTRAN programs for solving coupled Gross-Pitaevskii equations for spin-orbit coupled spin-1 Bose-Einstein condensate
Creators: name: Kaur, Pardeep
name: Roy, Arko
name: Gautam, Sandeep
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: Here, we present simple and efficient numerical scheme to study static and dynamic properties of spin-1 Bose-Einstein condensates (BECs) with spin-orbit (SO) coupling by solving three coupled Gross-Pitaevskii equations (CGPEs) in three-, quasi-two and quasi-one dimensional systems. We provide a set of three codes developed in FORTRAN 90/95 programming language with user defined '{\em option}' of imaginary and real-time propagation. We present the numerical results for energy, chemical potentials, and component densities for the ground state and compare with the available results from the literature. The results are presented for both the ferromagnetic and antiferromagnetic spin-1 BECs with and without SO coupling. To improve the computational speed, all the codes have the option of OpenMP parallelization. We have also presented the results for speedup and efficiency of OpenMP parallelization for the three codes with both imaginary and real-time propagation.
Data-driven probability concentration and sampling on manifold
Creators: name: Soize, Christian
name: Ghanem, Roger
Publisher: name: arXiv
Year: 2016
Subjects: subject: Probability (math.PR)
subject: Statistics Theory (math.ST)
subject: FOS: Mathematics

description: A new methodology is proposed for generating realizations of a random vector with values in a finite-dimensional Euclidean space that are statistically consistent with a data set of observations of this vector. The probability distribution of this random vector, while a-priori not known, is presumed to be concentrated on an unknown subset of the Euclidean space. A random matrix is introduced whose columns are independent copies of the random vector and for which the number of columns is the number of data points in the data set. The approach is based on the use of (i) the multidimensional kernel-density estimation method for estimating the probability distribution of the random matrix, (ii) a MCMC method for generating realizations for the random matrix, (iii) the diffusion-maps approach for discovering and characterizing the geometry and the structure of the data set, and (iv) a reduced-order representation of the random matrix, which is constructed using the diffusion-maps vectors associated with the first eigenvalues of the transition matrix relative to the given data set. The convergence aspects of the proposed methodology are analyzed and a numerical validation is explored through three applications of increasing complexity. The proposed method is found to be robust to noise levels and data complexity as well as to the intrinsic dimension of data and the size of experimental data sets. Both the methodology and the underlying mathematical framework presented in this paper contribute new capabilities and perspectives at the interface of uncertainty quantification, statistical data analysis, stochastic modeling and associated statistical inverse problems.
description: Submitted to Journal of Computational Physics on September 27, 2015
Characterizing PV Arcing Conditions with Impedance Spectroscopy and Frequency Response Analysis
Creators: name: Johnson, J.
name: Strauch, J.
name: Kuszmaul, S.
name: Bower, W.
name: Schoenwald, D.
Publisher: name: WIP
Year: 2011
Subjects: Components for PV Systems
Balance of System Components

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 3751-3756
description: Photovoltaic arc faults have led to a number of rooftop fires that have caused significant property
damage and threatened the safety of building occupants. In response, Article 690.11 was added to the United States
2011 National Electrical Code, requiring new PV systems on or penetrating a building to include a listed arc fault
protection device. Many proposed arc fault detectors utilize frequency content on the PV string to remotely
determine if an arc fault is occurring. A frequency response analyzer was used to measure the AC frequency and
impedance response of an 80 W polycrystalline module with degradation similar to those which have caused arc
fault. The module had intermittent electrical connectivity in the junction box because of a failed solder bond, and the
quality of the connection could be manipulated by adjusting the external wire orientation. By reorienting the wire,
the impedance profile changed and the frequency response transitioned between high-pass, low-pass, and no filtering
behavior. This indicated (1) certain module conditions can filter arc fault noise frequencies, and (2) the frequency
response or impedance spectroscopy of PV components could be used to identify conditions that cause arc faults in
PV systems. The implications for the former are serious because if the detection frequencies used by the fault circuit
interrupter (AFCI) are sufficiently filtered, the device will not trip and the arc will not be extinguished. Finally,
infrared images were taken of the intermittent module to identify the area of damage and corroborate the impedance spectroscopy results.
Electrical and Thermal Performance of the ANU-Chromasun Micro-Concentrator System
Creators: name: Everett, V.
name: Harvey, J.
name: Vivar, M.
name: Thomsen, E.
name: Fuentes, M.
name: Ebert, M.
name: Le Lievre, P.
name: Greaves, M.
name: Tanner, A.
name: Blakers, A.
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; 722-725
description: The Australian National University, in partnership with Chromasun Inc., have jointly developed a
hybrid linear CPV-Thermal (CPV-T) system designed specifically for roof-top applications. The micro-concentrator
(MCT) is a fully sealed, light-weight structure with a low wind-load factor. It incorporates modified one-sun solar
cells operating at around 20X geometric concentration and 12 to 15 suns effective optical concentration, and uses a
novel, ultra-lightweight Fresnel array with closed loop tracking to produce electricity, as well as thermal energy
suitable for generating hot water or running absorption chillers. The development of this system was motivated by the
demonstrable benefits of on-site generation of both thermal and electrical energy, with a higher combined efficiency
and reduced roof-top footprint, than independent, conventional PV arrays and solar hot water systems. The compact
form-factor allows for the installation of multiple MCT units, comprising a range of hybrid and thermal-only units to
satisfy site requirements, with the low-profile form-factor providing a less obtrusive, aesthetically-pleasing
installation. Several hybrid CPV-T MCT prototype systems have been constructed and are in various stages of
testing. Preliminary electrical and thermal performance data will be presented.
Fast uncertainty quantification of tracer distribution in the brain interstitial fluid with multilevel and quasi Monte Carlo
Creators: name: Croci, Matteo
name: Vinje, Vegard
name: Rognes, Marie E.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computational Engineering, Finance, and Science (cs.CE)
subject: Numerical Analysis (math.NA)
subject: Computation (stat.CO)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: Efficient uncertainty quantification algorithms are key to understand the propagation of uncertainty -- from uncertain input parameters to uncertain output quantities -- in high resolution mathematical models of brain physiology. Advanced Monte Carlo methods such as quasi Monte Carlo (QMC) and multilevel Monte Carlo (MLMC) have the potential to dramatically improve upon standard Monte Carlo (MC) methods, but their applicability and performance in biomedical applications is underexplored. In this paper, we design and apply QMC and MLMC methods to quantify uncertainty in a convection-diffusion model of tracer transport within the brain. We show that QMC outperforms standard MC simulations when the number of random inputs is small. MLMC considerably outperforms both QMC and standard MC methods and should therefore be preferred for brain transport models.
description: Multilevel Monte Carlo, quasi Monte Carlo, brain simulation, brain fluids, finite element method, biomedical computing, random fields, diffusion-convection
Reflections on Monadic Lenses
Creators: name: Abou-Saleh, Faris
name: Cheney, James
name: Gibbons, Jeremy
name: McKinna, James
name: Stevens, Perdita
Publisher: name: arXiv
Year: 2016
Subjects: subject: Programming Languages (cs.PL)
subject: FOS: Computer and information sciences

description: Bidirectional transformations (bx) have primarily been modeled as pure functions, and do not account for the possibility of the side-effects that are available in most programming languages. Recently several formulations of bx that use monads to account for effects have been proposed, both among practitioners and in academic research. The combination of bx with effects turns out to be surprisingly subtle, leading to problems with some of these proposals and increasing the complexity of others. This paper reviews the proposals for monadic lenses to date, and offers some improved definitions, paying particular attention to the obstacles to naively adding monadic effects to existing definitions of pure bx such as lenses and symmetric lenses, and the subtleties of equivalence of symmetric bidirectional transformations in the presence of effects.
Microscale Thin Film Solar Cells: A Concept for Ultra-High Solar Concentration
Creators: name: Paire, M.
name: Shams, A.
name: Lombez, L.
name: Péré-Laperne, N.
name: Collin, S.
name: Perona, A.
name: Dollet, A.
name: Pelouard, J.-L.
name: Guillemoles, J.-F.
name: Lincot, D.
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; 730-732
description: The miniaturization of polycrystalline thin film solar cells enables the use of middle to high
concentration, without excessive resistive losses or cooling system. This work if focused on the characterization
of Cu(In, Ga)Se2 microcells, with lateral dimensions of 25 μm and 50 μm, where we show an important opencircuit
voltage and efficiency increase under sunlight concentration. The experimental results are in good
agreement with those of previous tests under laser light. The microcell structure, which could be implemented on
other types of thin film solar cells, is a suitable way to use concentration on solar cells, leading to increased
efficiencies and important potential material saving.
Injection of a single electron from static to moving quantum dots
Creators: name: Bertrand, Benoit
name: Hermelin, Sylvain
name: Mortemousque, Pierre-André
name: Takada, Shintaro
name: Yamamoto, Michihisa
name: Tarucha, Seigo
name: Ludwig, Arne
name: Wieck, Andreas D.
name: Bäuerle, Christopher
name: Meunier, Tristan
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study the injection mechanism of a single electron from a static quantum dot into a moving quantum dot created in a long depleted channel with surface acoustic waves (SAWs). We demonstrate that such a process is characterized by an activation law with a threshold that depends on the SAW amplitude and the dot-channel potential gradient. By increasing sufficiently the SAW modulation amplitude, we can reach a regime where the transfer is unitary and potentially adiabatic. This study points at the relevant regime to use moving dots in quantum information protocols.
description: 5 pages, 4 figures
Variations in Pupillary Response to Virtual Augmented Reality In Real Time
Creators: name: Isiaka, Fatima
Publisher: name: International Journal of Computer Aided Design and Application
Year: 2024

description: The changes that occur in pupil sizes during a virtual scene are indicative of user engagement and cognitive load for different tasks in an environment such as the Virtual scene. It may also serve as a preferredphysiological measure for an applied setting. In scenarios where scene brightness cannot be controlled, the pupil response can be correlated to cognitive-emotional response as leverage in pupil indexing in users. Thepossibility of predicting the pupillary response of an individual’s pupil by factoring out measurement is a major challenge, but this can be modelled through a virtual scene. In this paper, we evaluate the optimal responsein pupil response to the virtual scenes through a non-immerse method of augmented reality environment. The result shows error in pupil response is less visible when compared to the visual output in mapped fixation ofthe XYZ-coordinate and an exponential coordinate of the participant’s ser-friendly calibration to the virtual scene. This procedure can lead to a pilot study involving training in a 3D environment.
Geometric Optics at Nanotextured TCO Interfaces for Solar Cell Application
Creators: name: Schulte, M.
name: Jorke, S.
name: Pieters, B.
name: Stiebig, H.
name: Bittkau, K.
name: Rau, U.
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; 2804-2807
description: Light Trapping in thin film silicon solar cells is a challenge for the optical improvement of textured
transparent conducting oxides (TCO). Scanning near-field optical microscopy (SNOM) is used for the experimental
investigation of the microscopic scattering properties. To correlate structural features of the TCO film with the measured
SNOM scattering intensities, we introduce a ray tracing model based on the TCO topography. For distances smaller than
approximately 2.0 μm from the TCO surface the model can explain the most important scattering characteristics. The
formation of intensity foci on a crater-like ZnO topography can be explained by the micro lens effect.
Novel Texture for String Ribbon Silicon Solar Cells
Creators: name: Cichoszewski, J.
name: Lipinski, M.
name: Schwerdt, F.
name: Reuter, M.
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; 2357-2359
description: Metal assisted etching with palladium particles as catalyst enables acidic texturization of saw-damagefree
String Ribbon silicon. The effective reflectivity for finished MAE textured solar cells is 30 % lower than for
untextured solar cells and comparable with acidic textured multi-crystalline solar cells. The MAE textured String
Ribbon solar cells demonstrate an increase in the short circuit current ∆Jsc = + 0.3 mA/cm2 and efficiency  ∆ =
+ 0.1 % compared to untextured cells. Furthermore, the fill factor is ∆FF = + 0.4 % higher, as a result of a reduced
contact resistance on the textured surface. Unfortunately, at present, higher recombination on the surfaces and in the
emitter region limits the gain in efficiency of the new MAE texturization.
The Evolution of PV Solar Power Architectures: A Quantitative Analysis of Micro-Inverters' Performance vs. Conventional Inverters
Creators: name: Mohd, A.
Publisher: name: WIP
Year: 2011
Subjects: Components for PV Systems
Balance of System Components

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 3739-3744
description: The application of renewable energy in power generation is steadily increasing. This rapid growth is
supported by the recognition of these systems as an effective generation source with positive environmental and
economical effects. A key element at the grid side is the inverter. In conventional PV solar installations, modules are
connected in series, like a daisy chain, to form a “string”. A central inverter converts the high voltage DC output of
the string to AC for connection to the grid. The micro-inverter architecture allows each module to be an independent,
standalone, solar AC grid connect system with its own optimized energy production output. The purpose of this work
is to introduce a quantitative analysis of the yield gained of both Micro-inverters and Conventional inverters. The
study will show data from different inverters and different locations. This data will be analysed and the advantages
and disadvantages of both approaches will be discussed in detail.
Roll to Roll Fabrication Process of Thin-Film Silicon Solar Cells on Steel Foil
Creators: name: Soppe, W.J.
name: Van Aken, B.B.
name: Dörenkämper, M.
name: Devilee, C.
name: Heijna, M.C.R.
name: Löffler, J.
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; 2750-2753
description: ECN is developing a novel fabrication process for thin film silicon solar cells on steel foil. Key
features in this process chain are: 1) application of an insulating barrier layer which enables texturization of the rear
contact with submicron structures for light trapping; 2) Si deposition with remote, linear PECVD; 3) series
interconnection by laser scribing and printing after deposition of the layers (reducing the total number of process
steps). The barrier layer is primarily an enabler for monolithic series interconnection of cells, but we show that we
can also fabricate any arbitrary sub-micron structure in this layer by hot embossing to achieve optimum light
trapping in the solar cells. For deposition of doped and intrinsic silicon layers we use novel remote and linear
plasma sources, which are excellently suited for continuous roll-to-roll processing. We have been able to fabricate
device-quality amorphous and microcrystalline silicon layers with these sources. First pin a-Si solar cells have been
made on FTO glass, yielding initial efficiencies up to 4.5%. First nip a-Si cells made on steel foil plus textured
barrier layer yielded efficiencies of about 3.7%
The E-Learning of entrepreneurial skills through Practice Management and MOOCs. Projects, Perceptions and Perspectives
Creators: name: Bianchi, Massimo
Publisher: name: Department of Economics and Business Studies, University of Genoa
Year: 2020
Subjects: Organization

description: The paper presents the first results of some projects using learning by doing in the creation of start-ups through Practice Management by Simulimpresa. The purpose of these projects was to refine the teaching of entrepreneurial skills coupling the Practice Enterprise (PE) with MOOCs, Massive Open On line Courses. Both approaches can be included in the category of innovative teaching defined “Peer Learning” as an educational practice in which students interact to attain educational goals. In PE the challenge is to develop an enterprise start-up process. The theoretical framework is represented by connectivism and its implications with cognitivism and behaviourism. The empirical field consists in experiences realized in Erasmus Projects. The research was based on the perceptions by students in the acquisition of entrepreneurial competences and on the comparison among results obtained in main functional units. Main findings concern the improvement of the teaching approach in digital learning according to the learners’ functional destination.
Modelling and Simulation of Electrodermal Activity by Automated Concept
Creators: name: Isiaka, Fatima
Publisher: name: International Journal of Computer Studies and Advancement in Current Research
Year: 2024

description: The pilot study of the project was conducted as a model study on the possibility of automating the use of Electrodermal Activity (EDA) sensors embedded in a touchpad or touchscreen device to measure skin conductance in real-time. The EDA sensor pad is based on a custom approach to studying EDA by using the skin adaptive touchpad of an Android to track and record the EDA of the skin while the users are involved in a complex study. The concept behind the mechanism of the EDA model is described and an analytical tool is used to synchronise the response reading and detect both phasic and tonic changes in the skin. Error in EDA prediction on the parametric attributes was computed for lens and inner EDA response and the result shows that there is a higher margin in error detected for inner EDA than that of the Lens (touch screen), this could be due to an error in light illumination of settings with the simulated output. Subsequent modifications will be addressed in a later study.
Low Power Optical Concentrators Without Sun Tracking
Creators: name: Guignard, P.A.
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; 733-735
description: The development of low power concentrators (concentration factors < 10) that do not require sun
tracking for their operation could lead to new designs for solar panels that capture the benefits of concentration
without the associated costs of sun tracking machinery. A variety of two-dimensional designs for bifacial cells
has been produced with concentration factors between 3.0 (thermodynamic limit using bifacial cells and glass
with refractive index of 1.5) and up to 4.5 for narrower acceptance angles. They open up possibilities of new
designs, reduced costs and increased competitiveness.
Secondary Optics Design for Mitigating Tracking Errors in a Linear CPV System
Creators: name: Giannuzzi, A.
name: Pierucci, G.
name: Sansoni, P.
name: Fontani, D.
name: Francini, F.
name: Jafrancesco, D.
name: Mercatelli, L.
name: Sani, E.
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; 745-748
description: Maximizing the optical efficiency of a linear CPV system implies providing the appropriate cells lighting
even when an off axis sun tracking angle  occurs. Optical aberrations and the effects of solar divergence
contribute to spread the concentrated light. On the other hand, the small cells size imposes severe
requirements to the dimensions of the linear sun image produced by the collector. A secondary optics device
has been appositely designed and optimized to guarantee an appropriate lighting of the cells in a range of
-0,5< dy <0,5. As result the system has a lower efficiency in ideal work condition, but it is more stable in
many more realistic operating situations.
A New EMC DC Line Impedance Stabilization Network
Creators: name: Kirchhof, J.
name: Zhang, Y.
Publisher: name: WIP
Year: 2011
Subjects: Components for PV Systems
Balance of System Components

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 3735-3738
description: EMC emission measurements on photovoltaic inverters are carried out according to the generic
standard IEC61000-6-3. Since edition 2.0 published in 2006, changes have been made in the test setup for conducted
radiofrequency measurements. The DC-side of the inverter shall be connected with a CISPR AC-Line Impedance
Stabilization Network (LISN). In the first edition, a 150 Ohm LISN according to IEC50022 has been prescribed.
Many AC-LISN available on the EMC market include large earth capacities between the lines and PE. For many
transformerless inverters, these large capacities in the range of several microfarads will lead to malfunctions or
saturation effects in the EMC filters which will never occur if the inverter is connected to a photovoltaic generator
whose earth capacity is orders of magnitude lower. Because of these facts, an EMC test according to the actual
edition of EN 61000-6-3 on transformerless photovoltaic Inverters is not possible anymore. This disadvantage of the
standardization has been discovered in 2007 by Fraunhofer IWES. The investigation results have been discussed with
members of national and international standardization organizations. As an overcoming of this disadvantage, a new
test setup and a special PV-LISN will be included in the next edition of CISPR11/IEC55011.
On the geometry of physical measurements: topological and algebraic aspects
Creators: name: Resende, Pedro
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mathematical Physics (math-ph)
subject: Category Theory (math.CT)
subject: Operator Algebras (math.OA)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 81P15 (18F75 22A22 46L05 81P05 81P13)

description: We study the mathematical structure of the notion of measurement space, which extends aspects of noncommutative topology that are based on quantale theory. This yields a geometric model of physical measurements that provides a realist picture, yet also operational, such that measurements and classical information arise interdependently as primitive concepts. A derived notion of classical observer caters for a mathematical formulation of Bohr's classical/quantum divide. Two important classes of measurement spaces are obtained, respectively from C*-algebras and from second-countable locally compact open sober topological groupoids. The latter yield measurements of classical type and relate to Schwinger's notion of selective measurement. We show that the measurement space associated to the reduced C*-algebra of any second-countable locally compact Hausdorff étale groupoid is canonically equipped with a classical observer, and we establish a correspondence between properties of the observer and properties of the groupoid.
description: The introduction has been rewritten, small typos have been corrected
Information, Processes and Games
Creators: name: Abramsky, Samson
Publisher: name: arXiv
Year: 2016
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: We survey the prospects for an Information Dynamics which can serve as the basis for a fundamental theory of information, incorporating qualitative and structural as well as quantitative aspects. We motivate our discussion with some basic conceptual puzzles: how can information increase in computation, and what is it that we are actually computing in general? Then we survey a number of the theories which have been developed within Computer Science, as partial exemplifications of the kind of fundamental theory which we seek: including Domain Theory, Dynamic Logic, and Process Algebra. We look at recent work showing new ways of combining quantitative and qualitative theories of information, as embodied respectively by Domain Theory and Shannon Information Theory. Then we look at Game Semantics and Geometry of Interaction, as examples of dynamic models of logic and computation in which information flow and interaction are made central and explicit. We conclude by looking briefly at some key issues for future progress.
description: Appeared in Philosophy of Information, vol. 8 of Handbook of the Philosophy of Science, edited by Dov Gabbay and John Woods. arXiv admin note: substantial text overlap with arXiv:quant-ph/0312044 by other authors
Sequential motif profile of natural visibility graphs
Creators: name: Iacovacci, Jacopo
name: Lacasa, Lucas
Publisher: name: arXiv
Year: 2016
Subjects: subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: The concept of sequential visibility graph motifs -subgraphs appearing with characteristic frequencies in the visibility graphs associated to time series- has been advanced recently along with a theoretical framework to compute analytically the motif profiles associated to Horizontal Visibility Graphs (HVGs). Here we develop a theory to compute the profile of sequential visibility graph motifs in the context of Natural Visibility Graphs (VGs). This theory gives exact results for deterministic aperiodic processes with a smooth invariant density or stochastic processes that fulfil the Markov property and have a continuous marginal distribution. The framework also allows for a linear time numerical estimation in the case of empirical time series. A comparison between the HVG and the VG case (including evaluation of their robustness for short series polluted with measurement noise) is also presented.
description: 6 figures captioned
The universal DAHA of type $(C_1^\vee,C_1)$ and Leonard triples
Creators: name: Huang, Hau-Wen
Publisher: name: arXiv
Year: 2020
Subjects: subject: Representation Theory (math.RT)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 16G30, 33D45, 33D80, 81R10, 81R12

description: Assume that $\mathbb F$ is an algebraically closed field and $q$ is a nonzero scalar in $\mathbb F$ that is not a root of unity. The universal Askey--Wilson algebra $\triangle_q$ is a unital associative $\mathbb F$-algebra generated by $A,B, C$ and the relations state that each of $$ A+\frac{q BC-q^{-1} CB}{q^2-q^{-2}}, \qquad B+\frac{q CA-q^{-1} AC}{q^2-q^{-2}}, \qquad C+\frac{q AB-q^{-1} BA}{q^2-q^{-2}} $$ is central in $\triangle_q$. The universal DAHA $\mathfrak H_q$ of type $(C_1^\vee,C_1)$ is a unital associative $\mathbb F$-algebra generated by $\{t_i^{\pm 1}\}_{i=0}^3$ and the relations state that \begin{gather*} t_it_i^{-1}=t_i^{-1} t_i=1 \quad \hbox{for all $i=0,1,2,3$}; \\ \hbox{$t_i+t_i^{-1}$ is central} \quad \hbox{for all $i=0,1,2,3$}; \\ t_0t_1t_2t_3=q^{-1}. \end{gather*} It was given an $\mathbb F$-algebra homomorphism $\triangle_q\to \mathfrak H_q$ that sends \begin{eqnarray*} A &\mapsto & t_1 t_0+(t_1 t_0)^{-1}, \\ B &\mapsto & t_3 t_0+(t_3 t_0)^{-1}, \\ C &\mapsto & t_2 t_0+(t_2 t_0)^{-1}. \end{eqnarray*} Therefore any $\mathfrak H_q$-module can be considered as a $\triangle_q$-module. Let $V$ denote a finite-dimensional irreducible $\mathfrak H_q$-module. In this paper we show that $A,B,C$ are diagonalizable on $V$ if and only if $A,B,C$ act as Leonard triples on all composition factors of the $\triangle_q$-module $V$.
description: This is a q-analog work of arXiv:2003.06252
Strange metal in paramagnetic heavy-fermion Kondo lattice: Dynamical large-N fermionic multi-channel approach
Creators: name: Wang, Jiangfan
name: Chang, Yung-Yeh
name: Chung, Chung-Hou
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The mechanism of strange metal (SM) with unconventional charge transport near magnetic phase transitions has become an outstanding open problem in correlated electron systems. Recently, an exotic quantum critical SM phase was observed in paramagnetic frustrated heavy-fermion materials near Kondo breakdown. We establish a controlled theoretical framework to this issue via a dynamical large-N fermionic multichannel approach to the two-dimensional Kondo-Heisenberg lattice model, where KB transition separates a heavy-Fermi liquid from fermionic spin-liquid state. With Kondo fluctuations being fully considered, we find a distinct SM behavior with quasi-linear-in-temperature scattering rate associated with KB. When particle-hole symmetry is present, signatures of a critical spin-liquid SM phase as $T \rightarrow 0$ are revealed with $ω/T$ scaling extended to a wide range. We attribute these features to the interplay of critical bosonic charge (Kondo) fluctuations and gapless fermionic spinons. The implications of our results for the experiments are discussed.
description: 6 pages, 4 figures
Elasticity Induced Force Reversal Between Active Spinning Particles in Dense Passive Media
Creators: name: Aragones, J. L.
name: Steimel, J. P.
name: Alexander-Katz, A.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: The self-organization of active particles is governed by their dynamic effective interactions. Such interactions are controlled by the medium in which such active agents reside. Here, we study the interactions between active agents in a dense non-active medium. Our system consists of actuated spinning (active) particles embedded in a dense monolayer of passive (non-active) particles. We demonstrate that the presence of the passive monolayer alters dramatically the properties of the system and results in a reversal of the forces between active spinning particles from repulsive to attractive. The origin of such reversal is due to the coupling between the active stresses and elasticity of the system. This discovery provides a new mechanism for the interaction between active agents in complex and structured media, opening up new opportunities to tune the interaction range and directionality via the mechanical properties of the medium.
Using PV Module and Line Frequency Response Data to Create Robust Arc Fault Detectors
Creators: name: Johnson, J.
name: Kuszmaul, S.
name: Bower, W.
name: Schoenwald, D.
Publisher: name: WIP
Year: 2011
Subjects: Components for PV Systems
Balance of System Components

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 3745-3750
description: Photovoltaic (PV) systems have caused residential and commercial building fires when an electrical arc
fault initiates in the conduction path. Article 690.11 in the United States 2011 National Electrical Code requires new
photovoltaic systems on or penetrating a building to include a listed arc fault protection device to prevent additional
fires. In response, manufacturers are creating arc fault circuit interrupters (AFCIs) using electrical frequencies for
detection, but their operation is not fully characterized. Sandia National Labs has undergone a major effort to
identify detection difficulties and establish tests for PV AFCI manufacturers to ensure their product can robustly
detect arcing conditions while avoiding false trips from noise sources. In previous studies, arc fault signatures have
been compared to string noise and frequency-dependant attenuation through PV modules has been quantified. In this
paper, a frequency response analyzer was used to measure radio frequency (RF) propagation through arrays of
varying irradiance and size. Irradiance did not affect module frequency response, but the length of unshielded wiring
significantly affected the frequency response of the system above 100 kHz due to RF effects. Based on the RF affects
in PV systems, it is recommended that arc fault circuit interrupter manufacturers select detection frequencies below
100 kHz.
Double Printing of Front Contact Ag in c-Si Solar Cells
Creators: name: Galiazzo, M.
name: Furin, V.
name: Tonini, D.
name: Cellere, G.
name: Baccini, A.
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; 2338-2340
description: in this paper we demonstrate the advantages of multiple print approach respect to single print, providing
finger geometrical data, electrical performance and paste consumption results of double printed cells compared to single
printed ones. Furthermore we introduce the concept of “double printing generation II” (DP-II), an ensemble of advanced
solutions turned into a further improvement of cell performances: differentiated pastes for 1st and 2nd print, fine line
printing and advanced process control. We also show the improvements respect to generation I in term of efficiency gain,
finger geometry and advanced process control. Particular attention is put on module assembling of DP-II cells that gives
no additional efficiency losses than single printed cells, with no changes in manufacturing process.
Safe Disconnection - Experience in the Field with Electromechanical DC Switches and an Alternative Solution in PV Systems
Creators: name: Häring, A.
name: Laschinski, J.
name: Hehlgans, R.
name: Clemens, D.
name: Buchold, S.
Publisher: name: WIP
Year: 2011
Subjects: Components for PV Systems
Balance of System Components

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 3762-3763
description: In most countries DC switches are required by standards [1], [2] or at least common for maintenance
and service. Electromechanic DC switches are reliable and long-term proofed devices. They fulfil safety requirements
by covering the specification for safe disconnection. In PV plants the conditions for components are often very
specific. In case of DC switches some of them are critical for electromechanical switches. E.g. the wide range of
current and voltages is not easy to handle for these devices. Further the “non-switching” in PV plants – often longer
than 10 or 15 years – is really a challenge for this kind of components. Failures of electromechanical switches in PV
plants have been observed (Fig. 1). The motivation of the work is to show, what PV-specific conditions may cause
problems and how alternative systems handle these effects.
Importance Sampling for Pathwise Sensitivity of Stochastic Chaotic Systems
Creators: name: Fang, Wei
name: Giles, Mike
Publisher: name: arXiv
Year: 2020
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: This paper proposes a new pathwise sensitivity estimator for chaotic SDEs. By introducing a spring term between the original and perturbated SDEs, we derive a new estimator by importance sampling. The variance of the new estimator increases only linearly in time $T,$ compared with the exponential increase of the standard pathwise estimator. We compare our estimator with the Malliavin estimator and extend both of them to the Multilevel Monte Carlo method, which further improves the computational efficiency. Finally, we also consider using this estimator for the SDE with small volatility to approximate the sensitivities of the invariant measure of chaotic ODEs. Furthermore, Richardson-Romberg extrapolation on the volatility parameter gives a more accurate and efficient estimator. Numerical experiments support our analysis.
description: 29 pages, 31 figures
Process Integration of Boron BSF by CVD Technique on Large Surface in P-Type Bifacial Solar Cell Process Flow
Creators: name: Cabal, R.
name: Auriac, N.
name: Grange, B.
name: Veschetti, Y.
name: Heslinga, 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; 2341-2343
description: It is well accepted that advanced solar cell with substrate lower than 150 μm cannot be done with
conventional full area screen printed Aluminium Back Side Field (BSF). The purpose of this work is to study an
alternative solution to replace Al-BSF by boron BSF applied on a bifacial solar cell. Boron doped region can be
obtained by diffusion from screen printing doped paste [1], spin coating [2], gas [1] or plasma of a doped oxide layer.
In this work, diffusion from gas (BCl3) and Boron Silicate Glass (BSG) deposited via CVD technique are compared
and integrated in bifacial cell process flow. CVD technique is more compatible with processes involving one single
co-diffusion step since it enables monofacial diffusion. Such a co-diffusion of BSG layer and POCl3 has been
developed and is under integration in a large scale cell process flow. Different dielectric layers are investigated to
passivate the p+-doped region.
Promising results have already been obtained on bifacial solar cell on of 4”c-Si wafers by integrating BSG deposited
by CVD [3] and involving co-diffusion. By improving our p+ passivation layer at the back side of our cell, an
absolute gain up to 0.8% have been obtained on a large surface (125PSQ). Efficiency up to 18% has been reached
and we expect to break the wall of 19% by an advanced passivation layer and a new front side engineering.
This study highlights the results obtained on a surface of 148.6 cm2 with BSG as boron source.
The helper strategy in vector-transmission of plant viruses
Creators: name: Di Mattia Jérémy,
name: Zeddam Jean-Louis
name: Uzest Marilyne
name: Stéphane, Blanc
Publisher: name: Zenodo
Year: 2022
Subjects: virus, transmission, plant, vector, helper component

description: This is a preprint unpublished version of a review article concerning the role and mode of action of helper components in the vector transmission of plant viruses
description: This will be submitted for recommendation by PCI Infections
PatchUp: A Feature-Space Block-Level Regularization Technique for Convolutional Neural Networks
Creators: name: Faramarzi, Mojtaba
name: Amini, Mohammad
name: Badrinaaraayanan, Akilesh
name: Verma, Vikas
name: Chandar, Sarath
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Large capacity deep learning models are often prone to a high generalization gap when trained with a limited amount of labeled training data. A recent class of methods to address this problem uses various ways to construct a new training sample by mixing a pair (or more) of training samples. We propose PatchUp, a hidden state block-level regularization technique for Convolutional Neural Networks (CNNs), that is applied on selected contiguous blocks of feature maps from a random pair of samples. Our approach improves the robustness of CNN models against the manifold intrusion problem that may occur in other state-of-the-art mixing approaches. Moreover, since we are mixing the contiguous block of features in the hidden space, which has more dimensions than the input space, we obtain more diverse samples for training towards different dimensions. Our experiments on CIFAR10/100, SVHN, Tiny-ImageNet, and ImageNet using ResNet architectures including PreActResnet18/34, WRN-28-10, ResNet101/152 models show that PatchUp improves upon, or equals, the performance of current state-of-the-art regularizers for CNNs. We also show that PatchUp can provide a better generalization to deformed samples and is more robust against adversarial attacks.
description: AAAI - 2022
Continuum mechanics of the interaction of phase boundaries and dislocations in solids
Creators: name: Acharya, Amit
name: Fressenegeas, Claude
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The continuum mechanics of line defects representing singularities due to terminating discontinuities of the elastic displacement and its gradient field is developed. The development is intended for application to coupled phase transformation, grain boundary, and plasticity-related phenomena at the level of individual line defects and domain walls. The continuously distributed defect approach is developed as a generalization of the discrete, isolated defect case. Constitutive guidance for equilibrium response and dissipative driving forces respecting frame-indifference and non-negative mechanical dissipation is derived. A differential geometric interpretation of the defect kinematics is developed, and the relative simplicity of the actual adopted kinematics is pointed out. The kinematic structure of the theory strongly points to the incompatibility of dissipation with strict deformation compatibility.
description: Contribution to Workshop on Differential Geometry and Continuum Mechanics held at the Intl. Centre for Mathematical Sciences in Edinburgh, 2013. Ed: G. Q Chen, M. Grinfeld, R.J. Knops
An Augmented Cognition of Users to Task Performance
Creators: name: Isiaka, Fatima
name: Sophia, Al Sharji
Publisher: name: Microwave Journal of Current Research
Year: 2024

description: Recent research defines augmented cognition as a form of human-computer interaction where there is a tight coupling between the user and the computer achieved through physiological sensing of the user’s cognitive state. This paper investigates current works in the field of augmented cognition by design and analytical tools that integrate the physiological response of the user to the straightforward visual task. The cognitive response and the baseline estimate of the physiological response can be analysed standalone in a single all-in-one process. The physiological parameters can also be accessed in real-time and help to analyse and detect stress points immediately in an instant design decision.
Measuring healthcare performance in digitalization era: the Pharmacy Unit of Academic Hospital
Creators: name: Cristofaro, Concetta Lucia
name: Ventura, Marzia
name: Gentile, Teresa Anna Rita
name: Reina, Rocco
name: De Francesco, Adele
Publisher: name: Department of Economics and Business Studies, University of Genoa
Year: 2020
Subjects: Organization

description: The field of performance has grown so much over the years that in the various organizational contexts the awareness and use of Performance Measurement (PM) systems has increased. This change occurs also in healthcare. Performance measurement emerged in healthcare organizations to better quantify the achievement of objectives, to evaluate overall performance and promote excellence. Meanwhile organizations have increasingly refined ICT technologies and data collection and flows, in order to better configure performance measurement systems for the organizational units and processes. The focus of this research is to understand how technology can facilitate the monitoring of the indicators used in the measurement of health services, through an exploratory study on one specific hospital ward. In this case, the focus was on Academic Hospital of Catanzaro, where the performance measurement system was implemented in order to improve the quality of the offered service.
Combinatorial and stochastic properties of ranked tree-child networks
Creators: name: Bienvenu, François
name: Lambert, Amaury
name: Steel, Mike
Publisher: name: arXiv
Year: 2020
Subjects: subject: Probability (math.PR)
subject: Combinatorics (math.CO)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Mathematics
subject: FOS: Biological sciences
subject: 60C05, 05C80 (Primary) 92B10, 92B05, 60J10, 05C20 (Secondary)

description: Tree-child networks are a recently-described class of directed acyclic graphs that have risen to prominence in phylogenetics (the study of evolutionary trees and networks). Although these networks have a number of attractive mathematical properties, many combinatorial questions concerning them remain intractable. In this paper, we show that endowing these networks with a biologically relevant ranking structure yields mathematically tractable objects, which we term ranked tree-child networks (RTCNs). We explain how to derive exact and explicit combinatorial results concerning the enumeration and generation of these networks. We also explore probabilistic questions concerning the properties of RTCNs when they are sampled uniformly at random. These questions include the lengths of random walks between the root and leaves (both from the root to the leaves and from a leaf to the root); the distribution of the number of cherries in the network; and sampling RTCNs conditional on displaying a given tree. We also formulate a conjecture regarding the scaling limit of the process that counts the number of lineages in the ancestry of a leaf. The main idea in this paper, namely using ranking as a way to achieve combinatorial tractability, may also extend to other classes of networks.