cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Employee skills and digital transformation: preliminary insights from a case study
Creators: name: Prezioso, Gianluca
name: Ceci, Federica
name: Za, Stefano
Publisher: name: Department of Economics and Business Studies, University of Genoa
Year: 2020
Subjects: Organization

description: Recent technological innovations are reshaping the work-life and the workplace. Advances in automation and information and communication technology (ICT) drove scholars to identify the skills required for a competitive workforce. We analysed empirical data, collected from a multinational firm, through the lenses of the situational awareness approach, with the aim of investigating managers’ awareness about the relevance of digital skills to undertake a digitalization processes and whether this awareness differs across departments within the same organization. This study leads to three main contributions: (i) managers consider it essential to have a clear digital strategy in order to undertake digital transformation initiatives; (ii) managers consider it quite relevant to implement proper training initiatives both for acquiring and maintaining DS inside the organization and for fostering informal learning among senior experts and new employees; (iii) regardless of the business department, managers are often not properly aware of the DS required for a digital transformation process.
Mirror Based Spectral Splitting CPV System
Creators: name: Antonini, A.
name: Butturi, M.A.
name: Di Benedetto, P.
name: Zurru, P.
name: Sartore, 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; 762-765
description: CPower Srl has been designed and developed different Mirror Based Spectrum Splitting Systems
(MBS3); these highly innovative technical solutions are partially supported in the framework of European APOLLON
Project, with the aim to minimize the cost/performance ratio.
Cpower’s concentrators employ dichroic dielectric filters working for light interference that is an alternative respect
to other spectral splitting concepts based on the refraction of the light to spatially spread the wavelengths of the light.
In the CPower designs, the dichroic mirrors are introduced in an intermediate plane between primary optics and the
receivers; this configuration allows 2 different levels of optical concentration, suiting well with the requirements of Si
cells (primary receiver) and III-V cells (InGaP), in term of economics and electrical performances.
Experimental study of three-wave interactions among capillary-gravity surface waves
Creators: name: Haudin, Florence
name: Cazaubiel, Annette
name: Deike, Luc
name: Jamin, Timothée
name: Falcon, Eric
name: Berhanu, Michael
Publisher: name: arXiv
Year: 2016
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Chaotic Dynamics (nlin.CD)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: In propagating wave systems, three or four-wave resonant interactions constitute a classical non-linear mechanism exchanging energy between the different scales. Here we investigate three-wave interactions for gravity-capillary surface waves in a closed laboratory tank. We generate two crossing wave-trains and we study their interaction. Using two optical methods, a local one (Laser Doppler Vibrometry) and a spatio-temporal one (Diffusive Light Photography), a third wave of smaller amplitude is detected, verifying the three-wave resonance conditions in frequency and in wavenumber. Furthermore, by focusing on the stationary regime and by taking into account viscous dissipation, we directly estimate the growth rate of the resonant mode. The latter is then compared to the predictions of the weakly non-linear triadic resonance interaction theory. The obtained results confirm qualitatively and extend previous experimental results obtained only for collinear wave-trains. Finally, we discuss the relevance of three-wave interaction mechanisms in recent experiments studying gravity-capillary turbulence.
description: in press in Phys. Rev. E. Physical Review E : Statistical, Nonlinear, and Soft Matter Physics, American Physical Society, 2016
Design Considerations for Silicon Solar Cells as Part of the Aspis Concentrator Concept
Creators: name: Drew, K.
name: Brown, L.M.
name: Cole, A.
name: Heasman, K.C.
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; 625-628
description: Solar cells for concentrator applications tend to be small in size due to the use of light focusing optics
and minimization of material usage. Their geometry is governed by the optics used, which is particularly true for
solar cells developed as part of the ASPIS project (Active Solar Panel Initiative, funded by the European Commission
7th Framework Programme).
The ASPIS project involves the development of a fixed, flat panel, low concentration (10-20X) system with a novel
parallactic tracking technology. The design imposes restrictions on the cells used; long, narrow cells are required to
fit with the geometry of the concentrating optics, and edge effects associated with such a geometry need to be
addressed.
The Laser Grooved Buried Contact (LGBC) silicon solar cell process employed by Narec is readily optimised for use
under concentration. The high conductivity of the fine-line buried front contact enables the metallization pattern to be
adapted to handle the large current densities produced at concentrations while maintaining a low degree of shading,
giving the potential for high efficiency under concentration. This paper discusses the development of LGBC
silicon solar cells within the context of the ASPIS project.
Dynamic Lifetime Imaging Based on Photoluminescence Measurements
Creators: name: Herlufsen, S.
name: Ramspeck, K.
name: Hinken, D.
name: Schmidt, A.
name: Müller, J.
name: Bothe, K.
name: Schmidt, J.
name: Brendel, R.
Publisher: name: WIP-Munich
Year: 2010
Subjects: Wafer-Based Silicon Solar Cells and Materials Technology
Mono- and Multicrystalline Silicon Materials and Cells

description: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain; 2369-2373
description: We report on calibration-free photoluminescence carrier lifetime imaging for the examination of crystalline
silicon wafers. The photoluminescence measurements are performed using an indium gallium arsenide (InGaAs) camera. The
carrier lifetime is determined from the time dependent luminescence emission for a modulated optical excitation. A ratio,
including four photoluminescence images, acquired at different times during the modulated excitation, is calculated and
found to depend only on the camera integration time and the effective carrier lifetime. Therefore, the carrier lifetime is
unambiguously determined by this ratio without the knowledge of any additional wafer properties. The carrier lifetime is
obtained locally by comparing the experimentally determined ratio with the simulated ratio for every image pixel. We
demonstrate the applicability of the dynamic photoluminescence lifetime imaging technique to multicrystalline silicon wafers
by comparison with microwave-detected photoconductance decay and quasi steady-state photoconductance decay measurements.
Syzygies in Hilbert schemes of complete intersections
Creators: name: Caviglia, Giulio
name: Sammartano, Alessio
Publisher: name: arXiv
Year: 2019
Subjects: subject: Commutative Algebra (math.AC)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 13D02, 13C40, 13F55, 14C05

description: Let $ e_1, ..., e_c $ be positive integers and let $ Y \subseteq \mathbb{P}^n$ be the monomial complete intersection defined by the vanishing of $x_1^{e_1}, ..., x_c^{e_c}$. In this paper we study sharp upper bounds on the number of equations and syzygies of subschemes parametrized by the Hilbert scheme of points $Hilb^d(Y)$, and discuss applications to the Hilbert scheme of points $Hilb^d(X)$ of arbitrary complete intersections $X \subseteq \mathbb{P}^n$.
description: Final version
Aluminium Rear Emitter Large Area n-Type Cz-Si Solar Cells for Industrial Application
Creators: name: Kopecek, R.
name: Halm, A.
name: Popescu, L.
name: Peter, K.
name: Vazquez, M.A.
name: Fukushima, N.
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; 2381-2386
description: We present in average 17% efficient large area (156x156mm2) n-type Cz-Si solar cells with rear Alemitter
fabricated in an industrial like environment (average Voc=627.7mV, Jsc=34.6mA/cm2, FF=78.1%). The
processing sequences were intentionally kept very close to the conventional p-type firing through SiNx process due
to a simple transfer to existing p-type production lines. Single processing steps were optimised or slightly adapted to
the n-type structure such as FSF formation, edge isolation, paste selection, firing conditions and especially rear side
geometry for cell interconnection.
We show that, if we improve the front side properties such as improved FSF (e.g. selective FSF) and adapted
passivation, stable efficiencies around 18% are possible with our simple technology. To go beyond 18% more
advanced processes on the front are needed such as fine-line printing or even elimination of the front contacts to the
back resulting in an IBC cell with local Al-emitter. Even with the screen printing process an efficiency close to 20%
should be feasible.
The focus of this work was to identify and test different interconnection schemes on the rear side of our cell. We
present simple methods how shunting of the standard rear side has been overcome and therefore the interconnection
of strings can be done in an even more simple than conventional way. Tests regarding mechanical and electrical
properties of the alternative interconnections are very promising and could even substitute conventional soldering
techniques on p-type substrates.
InPhoCUS, a Novel Design for Concentration Photovoltaics: Characterization of the Receiver and Light Uniformity Analysis
Creators: name: Pravettoni, M.
name: Cadruvi, M.
name: Cooper, T.
name: Milosevic, M.
name: Dittmann, S.
name: Ambrosetti, G.
name: Steinfeld, 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; 726-729
description: InPhoCUS (Inflated PhotovoltaiC Ultra-light mirror concentratorS) is a project funded by the Swiss
Confederation’s Innovation Promotion Agency. The goal of the project is to realize a commercially cost-competitive
and innovative high intensity concentrating photovoltaic (CPV) system, made by unconventional pneumatic
multilayer polymeric mirrors, an innovative fibre-reinforced concrete structure and an original tracking system. The
current design of the CPV solar collector is presented in detail. The electrical characterization of candidate CPV cell
is performed on the high intensity pulsed solar simulator in use at SUPSI. The electrical performance at various
temperatures and irradiances is tested. In the absence of dedicated CPV standard procedures, international standard
IEC 60904 are modified conveniently and applied. The impact of irradiance non-uniformity on cell performance is
then analysed experimentally.
Outcoupling vector solitons from a Bose-Einstein condensate with time-dependent interatomic forces
Creators: name: Feijoo, David
name: Paredes, Ángel
name: Michinel, Humberto
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We discuss the possibility of emitting vector solitons from a two-component elongated BEC by manipulating in time the inter- or intra-species scattering lengths with Feshbach resonance tuning. We present different situations which do not have an analogue in the single species case. In particular, we show vector soliton out-coupling by tuning the interspecies forces, how the evolution in one species is controlled by tuning the dynamics of the other, and how one can implement the so-called supersolitons. The analysis is performed by numerical simulations of the one-dimensional Gross-Pitaevskii equation. Simple analytic arguments are also presented in order to give a qualitative insight.
Development of Model and Software for Optimization of Primary and Secondary Optical Components for Photovoltaic Concentration
Creators: name: Fartaria, T.
name: Mendes-Lopes, J.
name: Wemans, J.
name: Figueira, G.
name: Cardoso, B.
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; 741-744
description: This paper presents a tool for designing new secondary optics mirrors for CPV modules based on the
asymmetrical CPC and CEC design methods, and optimization of maximum direct irradiation collection.
Defining the mathematical equations in CAD design software, the design of reflective SOEs (mirrors) is performed much
faster, and the drawing limits and restrictions are easily defined by the user. The method simplifies the difficult and long
task to program algorithms to draw the SOEs (such as Flow-line or SMS method, among others), and has as advantages
the result being always visual and easily changed, the restrictions (such as the imposed by edge-rays) are very easily
performed.
In this paper the model developed and design method are presented. To test the model, it was applied to the new
concentrator of WS Energia, HSUN®.
Deflation for semismooth equations
Creators: name: Farrell, Patrick E.
name: Croci, Matteo
name: Surowiec, Thomas M.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Optimization and Control (math.OC)
subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 65K15, 65P30, 65H10, 35M86, 90C33

description: Variational inequalities can in general support distinct solutions. In this paper we study an algorithm for computing distinct solutions of a variational inequality, without varying the initial guess supplied to the solver. The central idea is the combination of a semismooth Newton method with a deflation operator that eliminates known solutions from consideration. Given one root of a semismooth residual, deflation constructs a new problem for which a semismooth Newton method will not converge to the known root, even from the same initial guess. This enables the discovery of other roots. We prove the effectiveness of the deflation technique under the same assumptions that guarantee locally superlinear convergence of a semismooth Newton method. We demonstrate its utility on various finite- and infinite-dimensional examples drawn from constrained optimization, game theory, economics and solid mechanics.
description: 24 pages, 3 figures
Predictive Tonic Phase on Physiological Response Using Dynamic Control Modulation
Creators: name: Isiaka, Fatima
name: Sophia, Al Sharji
Publisher: name: Microwave Journal of Current Research
Year: 2024

description: The paper is based on a set of common control motor dynamics and how they can be used to characterise a variety of physiological processes and mechanisms. Most works on physiological control systems offer a state-of-the-art resource that reviews the fundamentals and concepts of classical control theory and how engineering methodology can be adapted to obtain a quantitative understanding of physiological systems. This paper contains advanced procedures that feature applications of control motor dynamics to physiological measures based on non-linear dynamics.
An Eye Authentication APP through Image Sensing Modelling
Creators: name: Isiaka, Fatima
name: Zainab, Adamu
Publisher: name: Advancement in Human Computer Interaction and Human Physiological Modelling
Year: 2024

description: An eye authentication software or tool is a form of the embedded module that includes an image data extraction front-end unit for determining the main concentric circle of the image of the eye as an integrating circle; a pupil radius detection unit which is used for detecting the integrated value of the integrating circle in stepwise order. This paper dealt with this approach by using system control dynamics for physical systems todetermine the predictive focus of the eye by detecting constant changes in pupil dilation and constriction. Most current research has found that there are a lot of stories behind the concept of emotional response related to pupillary metrics on both constriction and dilation. We approach the current concept by using a contour integrating unit for integrating the captured image data extracted by the image data extraction unit with the eye circumference. The N4SID is a physical dynamic system for predicting complex behaviour patterns and this is used here to address the problem of outlier inclusion as part of the image data acquisition.The system is used here as a front-end engine integrated for detecting and controlling pupil response from a mobile camera lens in real-time. Initial results show that N4SID with the first order perfectly predicts the centric coordinate of the pupil in both constriction and dilation of all five epochs used on the differential equation.
Spin-Directed Momentum Transfers in SIDIS Baryon Production
Creators: name: Sivers, Dennis
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The measurement of transverse single-spin asymmetries for baryon production in the target fragmentation region of semi-inclusive deep-inelastic scattering (SIDIS), can produce important insight into those nonperturbative aspects of QCD directly associated with confinement and with the dynamical breaking of chiral symmetry. We discuss here, interns of spin-directed momentum transfers, the powerful quantum field-theoretical constraints on the spin-orbit dynamics underlying these transverse spin observables. The spin-directed momentum shifts, originating either in the target nucleon or in the QCD jets produced in the deep inelastic scattering process, represent significant quantum entanglement effects connecting information from current fragmentation with observables in target fragmentation.
description: 7 pages with 3 figures. Contribution to POETIC16 Conference
Deterministic Joint Remote Preparation of a Four-qubit Cluster-type State via GHZ states
Creators: name: Wang, Hai-bin
name: Zhou, Xiao-Yan
name: An, Xing-xing
name: Cui, Meng-Meng
name: Fu, De-sheng
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: 81-XX

description: A scheme for the deterministic joint remote preparation of a four- qubit cluster-type state using only two Greenberger-Horne-Zeilinger (GHZ) states as quantum channels is presented. In this scheme, the first sender per- forms a two-qubit projective measurement according to the real coefficient of the desired state. Then, the other sender utilizes the measurement result and the complex coefficient to perform another projective measurement. To obtain the desired state, the receiver applies appropriate unitary operations to his/her own two qubits and two CNOT operations to the two ancillary ones. Most interestingly, our scheme can achieve unit success probability, i.e., Psuc=1. Furthermore, comparison reveals that the efficiency is higher than that of most other analogous schemes.
description: 10 pages, 2 figures
Affective Correlates to Emoticons on Visual E-Commerce and E-Learning Webpages
Creators: name: Isiaka, Fatima
name: Zainab, Adamu
Publisher: name: Journal of Computer Science and Applications
Year: 2024

description: Recent research shows that the concept of integrating affective systems into dynamic control models has its origin in Newtonian mechanics where it is possible to derive computational models on emotional response predictions based on physical phenomena. The engineering disciplines and the evolution rule of dynamic systems are based on an implicit relation that mostly gives the state of the system for a while into the future in the form of a third other differential equation. Identifying the state for all affected states in a control loop requires iterating the relation among user attributes several times to give a custom definition to every novel state model. This paper presents a novel method of integrating the affect state of users to a parallelcontrol motor dynamics with a state-space procedure to predict the emotional response of users to e-learning and e-commerce webpages and its correlates to emotional emoticons on webpages. There were three (3) modules to approach this: (1) conduct a brief literature review on dynamic control systems (2) define a state-space system that holds all user attributes (2) make predictions on affect state by the representation of user emotion to emotional emoticons. (4) convey emotional emoticons on visual fixation locations through mapping schematics. The process enables the development of Artificial intelligence (AI) analytics that interpret user emotions on visual interfaces.
Cognitive Response Classification From Physiological Recordings Based on Data Segregation
Creators: name: Isiaka, Fatima
Publisher: name: International Journal of Multidisciplinary Research and Human Factors
Year: 2024

description: The cognitive response is a range of mental processes relating to the acquisition, manipulation, storage, and retrieval of information. It helps to underpin a lot of daily life activities both health, age span, and diseases. The main ability to test and monitor cognitive performance across the lifespan opens up the chance for both patients and users to be identified and access certain treatments faster and stay healthy and also increase cognitive perception by helping to optimise a given process. The paper addresses concepts in cognitive response by data marginalisation using aggregate residuals of the user to understand their cognitive response based on five main classes of user cognition to solve a particular problem. Forty participants were recruited to test the level of cognition on a complex mathematical problem, they were asked to solve these problems using the shortest means to arrive at the solution. The result shows that the complex mood is usually related to these forms of problem while the user is relaxed and complexity in a problem doesn’t necessarily mean a high optimal response at peak level but rather a decrease in amplitude of the person’s response to task performance.
Jump Markov models and transition state theory: the Quasi-Stationary Distribution approach
Creators: name: Di Gesù, Giacomo
name: Lelièvre, Tony
name: Peutrec, Dorian Le
name: Nectoux, Boris
Publisher: name: arXiv
Year: 2016
Subjects: subject: Probability (math.PR)
subject: Mathematical Physics (math-ph)
subject: Analysis of PDEs (math.AP)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 60J60, 35P20

description: We are interested in the connection between a metastable continuous state space Markov process (satisfying e.g. the Langevin or overdamped Langevin equation) and a jump Markov process in a discrete state space. More precisely, we use the notion of quasi-stationary distribution within a metastable state for the continuous state space Markov process to parametrize the exit event from the state. This approach is useful to analyze and justify methods which use the jump Markov process underlying a metastable dynamics as a support to efficiently sample the state-to-state dynamics (accelerated dynamics techniques). Moreover, it is possible by this approach to quantify the error on the exit event when the parametrization of the jump Markov model is based on the Eyring-Kramers formula. This therefore provides a mathematical framework to justify the use of transition state theory and the Eyring-Kramers formula to build kinetic Monte Carlo or Markov state models.
description: 14 pages
title: Evolution of winter and summer marine heatwaves in Antarctica and its surroundings since 1981
title: Marine heatwaves
titleType: AlternativeTitle
Creators: name: Gonzalez-Reyes, Alvaro
Publisher: name: Zenodo
Year: 2024

description: Marine heat waves (MHWs; events of at least 5 consecutive days that exhibit sea surface temperature, SST, above a threshold corresponding to each location) record changes in frequency and intensity in various regions of the world. Their impacts can be severe since they generate alterations in the biodiversity and dynamics of the oceans. In the high latitudes of the southern hemisphere, MHWs have been reported during the austral summer (November to March, NM) in different locations (among others, the Tasman Sea). However, the MHWs during the autumn to spring months (May to October, MO) and summer still need to be better understood, particularly in Antarctica and its surroundings. We used daily SST data based on the ERA5 reanalysis to evaluate decadal-scale trends of MHWs during 1981-2022 for MO and 1981-2023 for NM. The 90th (P90), 95th (P95), and 99th (P99) percentiles have been defined as SST intensity thresholds, calculated from the period 1981-2010. MHWs were evaluated using different durations, from 5 to 60 consecutive days. Our results indicate, for MHWs defined from the P90 and P95 percentiles during the MO, when using periods of 5 to 10 days, an increase of up to 1 consecutive MHW event per decade in the Amundsen-Bellinghausen Sea (AB ) and north of the Antarctic Peninsula. Similar trends are also found in NM using the three percentiles, accounting for a similar increase in MHWs observed in the AB, Ross, and Davis Sea.

 
description: Poster presentation SCAR Science meeting 2024, Pucon, Chile.
Development of Linear-Type 200kW PV Array Simulator for Testing & Certification of Medium and Large-Sized PV Inverters
Creators: name: Kim, D.-W.
name: Bergwinkl, T.
name: Jeong, J.-Y.
name: Kim, E.-S.
name: Park, M.-W.
name: Yu, I.-K.
Publisher: name: WIP
Year: 2011
Subjects: Components for PV Systems
Balance of System Components

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 3730-3734
description: This paper deals with the development of a linear-type 200kW PV array simulator with two 100kW PV
array simulators in parallel operation, which can produce 200kW of the maximum output power even at 5 different
voltage ranges with the maximum output voltage of 950V. The linear power amplifier technology has been used to
ensure the stability and fast response time of the 200kW PV array simulator with high dynamic performance which
simulates the I-V characteristic curves as closely as to practical and realistic weather conditions with high testing
accuracy for an independent third-party testing and certification of grid-connected PV inverters. And also the
modular design makes us possible to increase its maximum power using 100kW of a unit module through the parallel
operation. Especially it has been developed fully to comply with the requirements of EN 50530 which has been
recently published in April 2010. And also, the new Korean test standard for testing & certification program of the
medium and large-sized photovoltaic inverter ranged from 10kW to 250kW would be introduced. And the typical test
results would be presented.
Kantian and Neo-Kantian First Principles for Physical and Metaphysical Cognition
Creators: name: Cuffaro, Michael E.
Publisher: name: arXiv
Year: 2019
Subjects: subject: History and Philosophy of Physics (physics.hist-ph)
subject: FOS: Physical sciences

description: I argue that Immanuel Kant's critical philosophy -- in particular the doctrine of transcendental idealism which grounds it -- is best understood as an `epistemic' or `metaphilosophical' doctrine. As such it aims to show how one may engage in the natural sciences and in metaphysics under the restriction that certain conditions are imposed on our cognition of objects. Underlying Kant's doctrine, however, is an ontological posit, of a sort, regarding the fundamental nature of our cognition. This posit, sometimes called the `discursivity thesis', while considered to be completely obvious and uncontroversial by some, has nevertheless been denied by thinkers both before and after Kant. One such thinker is Jakob Friedrich Fries, an early neo-Kantian who, despite his rejection of discursivity, also advocated for a metaphilosophical understanding of critical philosophy. As I will explain, a consequence for Fries of the denial of discursivity is a radical reconceptualisation of the method of critical philosophy; whereas this method is a priori for Kant, for Fries it is in general empirical. I discuss these issues in the context of quantum theory, and I focus in particular on the views of the physicist Niels Bohr and the Neo-Friesian philosopher Grete Hermann. I argue that Bohr's understanding of quantum mechanics can be seen as a natural extension of an orthodox Kantian viewpoint in the face of the challenges posed by quantum theory, and I compare this with the extension of Friesian philosophy that is represented by Hermann's view.
description: 36 pages, no figures. This version adds a footnote on the first page with a reference to the published version, and makes a small number of further minor changes and corrections
A multiplexer for the ac/dc characterization of TES based bolometers and microcalorimeters
Creators: name: Gottardi, Luciano
name: Akamatsu, Hiroki
name: Bruijn, Marcel
name: Gao, Jan R.
name: Hartog, Roland den
name: Hijmering, Richard
name: Hoevers, Henk
name: Khosropanah, Pourya
name: van der Kuur, Jan
name: van der Linden, Anoton
name: Lindeman, Marcel
name: Ridder, Marcel
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: At SRON we are developing the Frequency Domain Multiplexing (FDM) for the read-out of the TES-based detector array for the future infrared and X-ray space mission. We describe the performances of a multiplexer designed to increase the experimental throughput in the characterisation of ultra-low noise equivalent power (NEP) TES bolometers and high energy resolving power X-ray microcalorimeters arrays under ac and dc bias. We discuss the results obtained using the TiAu TES bolometers array fabricated at SRON with measured dark NEP below $5\cdot 10^{-19}W/Hz^{1/2}$ and saturation power of several fW
description: 7 pages, 6 figures, Proc. SPIE 8453, High Energy, Optical, and Infrared Detectors for Astronomy V, 845333 (25 September 2012). arXiv admin note: text overlap with arXiv:1604.02593
Fire Performance of Rack Mounted PV Modules on Roofing Assemblies
Creators: name: Tabaddor, M.
name: Backstrom, R.
Publisher: name: WIP
Year: 2011
Subjects: Components for PV Systems
Balance of System Components

description: 26th European Photovoltaic Solar Energy Conference and Exhibition; 3757-3761
description: In current fire safety standards, the fire performance ratings of photovoltaic (PV) modules installed on
roofs are based upon separate testing of the PV module and the roofing materials. This research was carried out to
determine if this component level assessment would be representative of a PV module installed on a roof, specifically
a rack mounted PV module. The tests in the fire safety standards (UL 790/1703) that were part of this research were
the Spread of Flame test and the Burning Brand test. In addition to testing, results from the fire modeling of the
Spread of Flame test are presented. The research strongly suggests that the presence of a rack mounted PV module on
a roof could adversely affect the fire performance of the roofing system. The extent of the performance degradation
depends upon the PV/roof installation parameters.
Reinforcement Learning for Joint Optimization of Multiple Rewards
Creators: name: Agarwal, Mridul
name: Aggarwal, Vaneet
Publisher: name: arXiv
Year: 2019
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Computer Science and Game Theory (cs.GT)
subject: Information Theory (cs.IT)
subject: Multiagent Systems (cs.MA)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Finding optimal policies which maximize long term rewards of Markov Decision Processes requires the use of dynamic programming and backward induction to solve the Bellman optimality equation. However, many real-world problems require optimization of an objective that is non-linear in cumulative rewards for which dynamic programming cannot be applied directly. For example, in a resource allocation problem, one of the objectives is to maximize long-term fairness among the users. We notice that when an agent aim to optimize some function of the sum of rewards is considered, the problem loses its Markov nature. This paper addresses and formalizes the problem of optimizing a non-linear function of the long term average of rewards. We propose model-based and model-free algorithms to learn the policy, where the model-based policy is shown to achieve a regret of $\Tilde{O}\left(LKDS\sqrt{\frac{A}{T}}\right)$ for $K$ objectives combined with a concave $L$-Lipschitz function. Further, using the fairness in cellular base-station scheduling, and queueing system scheduling as examples, the proposed algorithm is shown to significantly outperform the conventional RL approaches.
description: Accepted JMLR, Jul 2022
Outlier Detection in Physiological Data with Stalactite Demography Representation
Creators: name: Isiaka, Fatima
Publisher: name: International Journal of Human Computer Interaction and Cognitive Modelling
Year: 2024

description: In recent times, outlier detection has been used to detect points that are used to consider abnormal data attributes that don’t fit in a particular pattern. In its highly practical nature, outlier detection is used inmany real-world use cases. One of the most famous cases of the use of outlier detection is in financial fraud and malicious transactions for tracking abnormal relations by intelligence agencies using intelligent analytical tools. The outlier detection algorithms are very useful for any parastatals and can help to explore common outlier detection procedures and applications to big data environments. One of its major drawbacks is that it can be intimidating and look complex for an average person. This paper discusses a straight method of detecting outliers based on the categorization of data samples from a physiological study of users on e-learning and interactive webpages. There are two thousand datasets containing both synchronise physiological response and eye movement behaviour of users to dynamic contents and the major aim is to detect outlying cases due to errors in measurement and environmental factors. The dataset was categorised into data generated from the Adult response, Student response, Younger users’ response and Children’s response. The result shows there is an outlying case in children’s response data than the others because kids are not much conversant with e-learning and hence their reaction is based on straightforward tasks and mixed visual representation of eye movement and behaviour patterns.
Finite-Size Scaling Theory at a Self-Dual Quantum Critical Point
Creators: name: Zhang, Long
name: Ding, Chengxiang
Publisher: name: arXiv
Year: 2019
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The nondivergence of the generalized Grüneisen ratio (GR) at a quantum critical point (QCP) has been proposed to be a universal thermodynamic signature of self-duality. In this work, we study how the Kramers-Wannier-type self-duality manifests itself in the finite-size scaling behavior of thermodynamic quantities in the quantum critical regime. While the self-duality cannot be realized as a unitary transformation in the total Hilbert space for the Hamiltonian with the periodic boundary condition, it can be implemented in certain symmetry sectors with proper boundary conditions. Therefore, the GR and the transverse magnetization of the one-dimensional transverse-field Ising model exhibit different finite-size scaling behaviors in different sectors. This implies that the numerical diagnosis of self-dual QCP requires identifying the proper symmetry sectors.
description: 5 pages, 3 figures; v2: slightly revised, accepted version
Deep Learning for Single and Multi-Session i-Vector Speaker Recognition
Creators: name: Ghahabi, Omid
name: Hernando, Javier
Publisher: name: arXiv
Year: 2015
Subjects: subject: Sound (cs.SD)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: The promising performance of Deep Learning (DL) in speech recognition has motivated the use of DL in other speech technology applications such as speaker recognition. Given i-vectors as inputs, the authors proposed an impostor selection algorithm and a universal model adaptation process in a hybrid system based on Deep Belief Networks (DBN) and Deep Neural Networks (DNN) to discriminatively model each target speaker. In order to have more insight into the behavior of DL techniques in both single and multi-session speaker enrollment tasks, some experiments have been carried out in this paper in both scenarios. Additionally, the parameters of the global model, referred to as universal DBN (UDBN), are normalized before adaptation. UDBN normalization facilitates training DNNs specifically with more than one hidden layer. Experiments are performed on the NIST SRE 2006 corpus. It is shown that the proposed impostor selection algorithm and UDBN adaptation process enhance the performance of conventional DNNs 8-20 % and 16-20 % in terms of EER for the single and multi-session tasks, respectively. In both scenarios, the proposed architectures outperform the baseline systems obtaining up to 17 % reduction in EER.
Complexity bounds on supermesh construction for quasi-uniform meshes
Creators: name: Croci, M.
name: Farrell, P. E.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 65D05, 65D18, 68Q25, 68U05

description: Projecting fields between different meshes commonly arises in computational physics. This operation requires a supermesh construction and its computational cost is proportional to the number of cells of the supermesh $n$. Given any two quasi-uniform meshes of $n_A$ and $n_B$ cells respectively, we show under standard assumptions that n is proportional to $n_A + n_B$. This result substantially improves on the best currently available upper bound on $n$ and is fundamental for the analysis of algorithms that use supermeshes.
Predicting Electrical Changes in Skin Conductance Response Using Mobile Lens with a Custom Application
Creators: name: Isiaka, Fatima
name: Sophia, Al Sharji
Publisher: name: International Journal of Computer Science and Multidisciplinary Research
Year: 2024

description: Different apps can read the heart rate with a smartphone camera from the index finger placed on it, without external pulsometers, but none can read an Electrodermal activity (EDA) from the fingertips, most of the procedure is simply to press the smartphone camera lens gently with the finger and within a few seconds the readings are shown on the integrated app of the physiological signal. The main of this paper is to use a signal and image processing pipeline to estimate the Electrodermal activity based on the concept of Heart rate evolution over time from a video sequence of a fingertip touching the camera lens. Error in signal acquisition for inner EDA on the lens and outer EDA on the lens was based on a third-order differential equation.
Multilevel quasi Monte Carlo methods for elliptic PDEs with random field coefficients via fast white noise sampling
Creators: name: Croci, M.
name: Giles, M. B.
name: Farrell, P. E.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 65C05, 60G60, 65N30, 60H35, 35R60

description: When solving partial differential equations with random fields as coefficients the efficient sampling of random field realisations can be challenging. In this paper we focus on the fast sampling of Gaussian fields using quasi-random points in a finite element and multilevel quasi Monte Carlo (MLQMC) setting. Our method uses the SPDE approach of Lindgren et al.~combined with a new fast algorithm for white noise sampling which is taylored to (ML)QMC. We express white noise as a wavelet series expansion that we divide in two parts. The first part is sampled using quasi-random points and contains a finite number of terms in order of decaying importance to ensure good QMC convergence. The second part is a correction term which is sampled using standard pseudo-random numbers. We show how the sampling of both terms can be performed in linear time and memory complexity in the number of mesh cells via a supermesh construction, yielding an overall linear cost. Furthermore, our technique can be used to enforce the MLQMC coupling even in the case of non-nested mesh hierarchies. We demonstrate the efficacy of our method with numerical experiments.
Sub-sampling and other considerations for efficient risk estimation in large portfolios
Creators: name: Giles, Michael B.
name: Haji-Ali, Abdul-Lateef
Publisher: name: arXiv
Year: 2019
Subjects: subject: Mathematical Finance (q-fin.MF)
subject: Numerical Analysis (math.NA)
subject: FOS: Economics and business
subject: FOS: Mathematics
subject: 65C05, 65C30

description: Computing risk measures of a financial portfolio comprising thousands of derivatives is a challenging problem because (a) it involves a nested expectation requiring multiple evaluations of the loss of the financial portfolio for different risk scenarios and (b) evaluating the loss of the portfolio is expensive and the cost increases with its size. In this work, we look at applying Multilevel Monte Carlo (MLMC) with adaptive inner sampling to this problem and discuss several practical considerations. In particular, we discuss a sub-sampling strategy whose computational complexity does not increase with the size of the portfolio. We also discuss several control variates that significantly improve the efficiency of MLMC in our setting.
Conformal and isometric embeddings of gravitational instantons
Creators: name: Dunajski, Maciej
name: Tod, Paul
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Differential Geometry (math.DG)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We construct isometric and conformally isometric embeddings of some gravitational instantons in $\mathbb{R}^8$ and $\mathbb{R}^7$. In particular we show that the embedding class of the Einstein--Maxwell instanton due to Burns is equal to $3$. For $\mathbb{CP}^2$, Eguchi--Hanson and anti-self-dual Taub-NUT we obtain upper and lower bounds on the embedding class.
Probing Exotic Triple Higgs Couplings at the LHC
Creators: name: Gao, Christina
name: Neill, Nicolás A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In extended Higgs sectors that exhibit alignment without decoupling, the additional scalars are allowed to have large couplings to the Standard Model Higgs. We show that current nonresonant di-Higgs searches can be straightforwardly adapted to look for additional Higgses in these scenarios, where pair production of non-SM Higgses can be enhanced. For concreteness, we study pair production of exotic Higgses in the context of an almost inert two Higgs doublet model, where alignment is explained through an approximate $\mathbb{Z}_2$ symmetry under which the additional scalars are odd. In this context, the smallness of the $\mathbb Z_2$ violating parameter suppresses single production of exotic Higgses, but it does not prevent a sizeable trilinear coupling $hHH$ between the SM Higgs ($h$) and the additional states ($H$). We study the process $pp\rightarrow h^* \rightarrow HH$ in the final states $b\bar b b \bar b$, $b\bar bγγ$, and multi-leptons. We find that at the HL-LHC these modes could be sensitive to masses of the additional neutral scalars in the range $130\mbox{ GeV} \lesssim m_H \lesssim 290\mbox{ GeV}$.
description: matches JHEP version
Graded monomial identities and almost non-degenerate gradings on matrices
Creators: name: Centrone, Lucio
name: Diniz, Diogo
name: de Mello, Thiago Castilho
Publisher: name: arXiv
Year: 2020
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 16R50, 16W50, 16R99, 16R10

description: Let $F$ be a field of characteristic zero, $G$ be a group and $R$ be the algebra $M_n(F)$ with a $G$-grading. Bahturin and Drensky proved that if $R$ is an elementary and the neutral component is commutative then the graded identities of $R$ follow from three basic types of identities and monomial identities of length $\geq 2$ bounded by a function $f(n)$ of $n$. In this paper we prove the best upper bound is $f(n)=n$, more generally we prove that all the graded monomial identities of an elementary $G$-grading on $M_n(F)$ follow from those of degree at most $n$. We also study gradings which satisfy no monomial identities but the trivial ones, which we call almost non-degenerate gradings. The description of non-degenerate elementary gradings on matrix algebras is reduced to the description of non-degenerate elementary gradings on matrix algebras that have commutative neutral component. We provide necessary conditions so that the grading on $R$ is almost non-degenerate and we apply the results on monomial identities to describe all almost non-degenerate $\mathbb{Z}$-gradings on $M_n(F)$ for $n\leq 5$.
description: 21 pages. Corrections and improvements of some results
Holographically description of Kerr-Bolt Black hole in terms of the warped conformal field theory
Creators: name: Setare, M. R.
name: Jalali, A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Recently it has been speculated that a set of diffeomorphisms exist which act non-trivially on the horizon of some black holes such as Kerr and Kerr-Newman black hole. %\cite{Haco:2018ske,Haco:2019ggi}. Using this symmetry in covariant phase space formalism one can obtain conserved charges as surface integrals on the horizon. Kerr-Bolt spacetime is well-known for its asymptotic topology and has been studied widely in recent years. In this work we are going to study Kerr-Bolt black hole and provide a holographic description of it in term of warped conformal field theory.
description: 12 pages