cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Improved Pena-Rodriguez Portmanteau Test
Creators: name: Lin, Jen-Wen
name: McLeod, A. Ian
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 62M10, 91B84

description: Several problems with the diagnostic check suggested by Pena and Rodriguez [2002. A powerful portmanteau test of lack of fit for time series. J. Amer. Statist. Assoc. 97, 601-610.] are noted and an improved Monte-Carlo version of this test is suggested. It is shown that quite often the test statistic recommended by Pena and Rodriguez [2002. A powerful portmanteau test of lack of fit for time series. J. Amer. Statist. Assoc. 97, 601-610.] may not exist and their asymptotic distribution of the test does not agree with the suggested gamma approximation very well if the number of lags used by the test is small. It is shown that the convergence of this test statistic to its asymptotic distribution may be quite slow when the series length is less than 1000 and so a Monte-Carlo test is recommended. Simulation experiments suggest the Monte-Carlo test is usually more powerful than the test given by Pena and Rodriguez [2002. A powerful portmanteau test of lack of fit for time series. J. Amer. Statist. Assoc. 97, 601-610.] and often much more powerful than the Ljung-Box portmanteau test. Two illustrative examples of enhanced diagnostic checking with the Monte-Carlo test are given.
description: 19 pages, 2 figures, 4 tables
Integración de destrezas de información en la modalidad en línea, desde Webquests hasta objetos de aprendizaje
Creators: name: Centeno Alayón, Purísima
name: Figueroa Rodríguez, Sylvia J.
Publisher: name: Zenodo
Year: 2023
Subjects: destrezas de información
competencias de información
information literacy
OER
REA
objetos de aprendizaje
learning objects

description: Conferencia en línea ofrecida durante la Semana de la Biblioteca, el día 26 de abril de 2023, de 11:30 a.m. a 1:00 p.m., con el auspicio del Centro para la Excelencia Académica. El propósito fue mostrar a los docentes las herramientas en línea disponibles para desarrollar las destrezas de información de los estudiantes en modalidades presencial, híbrida o a distancia. Los materiales instruccionales que se mostraron están alineados al Proyecto Online Learning Assessment System (OLAS) los cuales cuentan con objetivos de aprendizaje específicos, preprueba (diagnóstico), posprueba (formativo) y rúbricas con criterios e indicadores de ejecución (sumativo) relacionados con el dominio de la misión del Recinto de Río Piedras llamado competencias de información.
Generative Interpretation
Creators: name: Arbel, Yonathan A.
name: Hoffman, David
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computation and Language (cs.CL)
subject: Artificial Intelligence (cs.AI)
subject: Computers and Society (cs.CY)
subject: Machine Learning (cs.LG)
subject: Theoretical Economics (econ.TH)
subject: FOS: Computer and information sciences
subject: FOS: Economics and business

description: We introduce generative interpretation, a new approach to estimating contractual meaning using large language models. As AI triumphalism is the order of the day, we proceed by way of grounded case studies, each illustrating the capabilities of these novel tools in distinct ways. Taking well-known contracts opinions, and sourcing the actual agreements that they adjudicated, we show that AI models can help factfinders ascertain ordinary meaning in context, quantify ambiguity, and fill gaps in parties' agreements. We also illustrate how models can calculate the probative value of individual pieces of extrinsic evidence. After offering best practices for the use of these models given their limitations, we consider their implications for judicial practice and contract theory. Using LLMs permits courts to estimate what the parties intended cheaply and accurately, and as such generative interpretation unsettles the current interpretative stalemate. Their use responds to efficiency-minded textualists and justice-oriented contextualists, who argue about whether parties will prefer cost and certainty or accuracy and fairness. Parties--and courts--would prefer a middle path, in which adjudicators strive to predict what the contract really meant, admitting just enough context to approximate reality while avoiding unguided and biased assimilation of evidence. As generative interpretation offers this possibility, we argue it can become the new workhorse of contractual interpretation.
Constraints on the Microphysics of Pluto's Photochemical Haze from New Horizons Observations
Creators: name: Gao, Peter
name: Fan, Siteng
name: Wong, Michael L.
name: Liang, Mao-Chang
name: Shia, Run-Lie
name: Kammer, Joshua A.
name: Yung, Yuk L.
name: Summers, Michael E.
name: Gladstone, G. Randall
name: Young, Leslie A.
name: Olkin, Catherine B.
name: Ennico, Kimberly
name: Weaver, Harold A.
name: Stern, S. Alan
name: Team, New Horizons Science
Publisher: name: arXiv
Year: 2016
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The New Horizons flyby of Pluto confirmed the existence of hazes in its atmosphere. Observations of a large high- to low- phase brightness ratio, combined with the blue color of the haze, suggest that the haze particles are fractal aggregates, analogous to the photochemical hazes on Titan. Therefore, studying the Pluto hazes can shed light on the similarities and differences between the Pluto and Titan atmospheres. We model the haze distribution using the Community Aerosol and Radiation Model for Atmospheres assuming that the distribution is shaped by sedimentation and coagulation of particles originating from photochemistry. Hazes composed of both purely spherical and purely fractal aggregate particles are considered. Agreement between model results and occultation observations is obtained with aggregate particles when the downward flux of photochemical products is equal to the column-integrated methane destruction rate ~1.2 $\times$ 10$^{-14}$ g cm$^{-2}$ s$^{-1}$, while for spherical particles the mass flux must be 2-3 times greater. This flux is nearly identical to the haze production flux of Titan previously obtained by comparing microphysical model results to Cassini observations. The aggregate particle radius is sensitive to particle charging, and a particle charge to radius ratio of 30 e-/μm is necessary to produce ~0.1-0.2 μm aggregates near Pluto's surface, in accordance with forward scattering measurements. Such a particle charge to radius ratio is 2-4 times higher than those previously obtained for Titan. Hazes composed of spheres with the same particle charge to radius ratio have particles that are 4 times smaller. These results further suggest that the haze particles are fractal aggregates. We also consider the effect of condensation of HCN, and C$_{2}$-hydrocarbons on the haze particles, which may play an important role in shaping their distributions.
description: 30 pages, 6 figures. Accepted for publication in Icarus
Reinterpreting the magnetoelectric coupling of polarizability tensors of infinite cylinders using symmetry: a simple TM/TE view
Creators: name: Chen, Parry Y.
name: Ben-Yakar, Jacob
name: Sivan, Yonatan
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Recently, Strickland et al retrieved dynamic polarizabilities of infinitely long wires at oblique incidence, reporting non-zero magnetoelectric coupling, seemingly defying existing theorems which forbid this in centrosymmetric scatterers. We reconcile this finding with existing symmetry restrictions on microscopic polarizabilities using a property of line dipoles. This motivates a reformulation of cylinder polarizability, yielding diagonal tensors that decompose the response into TM and TE contributions, simplifying subsequent treatment by homogenization theories. A transformation is derived between Strickland et al.'s formulation and our reformulation, allowing magnetoelectric coupling to be identified as the contrast between TM and TE responses, and enabling simple geometric insights into all its scaling and symmetry properties.
description: 22 pages, 3 figures
The influence of elastic strain gradient on the upper limit of flexocoupling strength, spatially-modulated phases and soft phonon dispersion in ferroics
Creators: name: Morozovska, Anna N.
name: Scherbakov, Christian M.
name: Vysochanskii, Yulian M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Within the framework of Landau-Ginzburg-Devonshire (LGD) theory we studied the role of the flexocoupling between the order parameter and elastic strain gradients in the stability of a spatially-modulated phase (SMP) in ferroics with commensurate and incommensurate long-range ordered phases under the presence of squired elastic strain gradient. The squired elastic strain gradient is required for the free energy stability to arbitrary strain gradients. Obtained analytical expressions showed that the fundamental upper limit for the magnitude of the static bulk flexoelectric effect strength, established by Yudin and Tagantsev under the absence of squired elastic strain gradient and higher order gradients terms, should be substituted by the temperature-dependent condition on the flexoelectric coupling strength under the presence of the gradient terms. Moreover, we established that the SMP appears and becomes stable in commensurate ferroics if the flexocoupling constant exceeds the critical value, defined by the reduced temperature, strain and order parameter gradients constants, striction and expansion coefficients in the LGD functional. We calculated the soft phonon dispersion in ferroics with commensurate and incommensurate long-range ordered phases allowing for the squired elastic strain gradient, as well as static and dynamic flexocoupling. Appeared that the dispersion for the optic mode is slightly sensitive to the flexocoupling, while the dispersion of acoustic mode strongly depends on the coupling strength. Obtained results demonstrate that the non-trivial differences in the dispersion of optic and acoustic modes appear under the change of flexocoupling constant.
description: 24 pages, 3 figures, including 3 Appendixes
The XXL survey XV: Evidence for dry merger driven BCG growth in XXL-100-GC X-ray clusters
Creators: name: Lavoie, S.
name: Willis, J. P.
name: Democles, J.
name: Eckert, D.
name: Gastaldello, F.
name: Smith, G. P.
name: Lidman, C.
name: Adami, C.
name: Pacaud, F.
name: Pierre, M.
name: Clerc, N.
name: Giles, P.
name: Lieu, M.
name: Chiappetti, L.
name: Altieri, B.
name: Ardila, F.
name: Baldry, I.
name: Bongiorno, A.
name: Desai, S.
name: Elyiv, A.
name: Faccioli, L.
name: Gardner, B.
name: Garilli, B.
name: Groote, M. W.
name: Guennou, L.
name: Guzzo, L.
name: Hopkins, A. M.
name: Liske, J.
name: McGee, S.
name: Melnyk, O.
name: Owers, M. S.
name: Poggianti, B.
name: Ponman, T. J.
name: Scodeggio, M.
name: Spitler, L.
name: Tuffs, R. J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The growth of brightest cluster galaxies is closely related to the properties of their host cluster. We present evidence for dry mergers as the dominant source of BCG mass growth at $z\lesssim1$ in the XXL 100 brightest cluster sample. We use the global red sequence, H$α$ emission and mean star formation history to show that BCGs in the sample possess star formation levels comparable to field ellipticals of similar stellar mass and redshift. XXL 100 brightest clusters are less massive on average than those in other X-ray selected samples such as LoCuSS or HIFLUGCS. Few clusters in the sample display high central gas concentration, rendering inefficient the growth of BCGs via star formation resulting from the accretion of cool gas. Using measures of the relaxation state of their host clusters, we show that BCGs grow as relaxation proceeds. We find that the BCG stellar mass corresponds to a relatively constant fraction 1\%\ of the total cluster mass in relaxed systems. We also show that, following a cluster scale merger event, the BCG stellar mass lags behind the expected value from the M$_{cluster}$ - M$_{BCG}$ relation but subsequently accretes stellar mass via dry mergers as the BCG and cluster evolve towards a relaxed state.
description: 16 pages, 13 figues
Radio Frequency Solid State Amplifiers
Creators: name: Jacob, J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: Solid state amplifiers are being increasingly used instead of electronic vacuum tubes to feed accelerating cavities with radio frequency power in the 100 kW range. Power is obtained from the combination of hundreds of transistor amplifier modules. This paper summarizes a one hour lecture on solid state amplifiers for accelerator applications.
description: 20 pages, contribution to the 2014 CAS - CERN Accelerator School: Power Converters, Baden, Switzerland, 7-14 May 2014
Current-voltage characteristics and vortex dynamics in highly underdoped La$_{2-x}$Sr$_{x}$CuO$_{4}$
Creators: name: Shi, Zhenzhong
name: Baity, P. G.
name: Popović, Dragana
Publisher: name: arXiv
Year: 2016
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The temperature dependence of the nonlinear current-voltage ($I$-$V$) characteristics in highly underdoped La$_{2-x}$Sr$_{x}$CuO$_{4}$ ($x=0.07$ and 0.08) thick films has been studied in both zero and perpendicular magnetic fields $H$. Power-law behavior of $V(I)$ is found for both $H=0$ and $H \neq 0$. The critical current $I_{c}$ was extracted, and its temperature and magnetic field dependences were studied in detail. The Berezinskii-Kosterlitz-Thouless physics dominates the nonlinear $I$-$V$ near the superconducting transition at $H=0$, and it continues to contribute up to a characteristic temperature $T_x(H)$. Nonlinear $I$-$V$ persists up to an even higher temperature $T_{h}(H)$ due to the depinning of vortices.
description: 4 pages, 4 figures; Superstripes 2015 conference
Entanglement and manipulation of the magnetic and spin-orbit order in multiferroic Rashba semiconductors
Creators: name: Krempasky, J.
name: Muff, S.
name: Bisti, F.
name: Fanciulli, M.
name: Volfová, H.
name: Weber, A.
name: Pilet, N.
name: Warnicke, P.
name: Ebert, H.
name: Braun, J.
name: Bertran, F.
name: Volobuev, V. V.
name: Minár, J.
name: Springholz, G.
name: Dil, J. H.
name: Strocov, V. N.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The interplay between electronic eigenstates, spin, and orbital degrees of freedom, combined with fundamental breaking of symmetries is currently one of the most exciting fields of research. Multiferroics such as (GeMn)Te fulfill these requirements providing unusual physical properties due to the coexistence and coupling between ferromagnetic and ferroelectric order in one and the same system. Here we show that multiferroic (GeMn)Te inherits from its parent ferroelectric α-GeTe compound a giant Rashba splitting of three-dimensional bulk states which competes with the Zeeman spin splitting induced by the magnetic exchange interactions. The collinear alignment of ferroelectric and ferromagnetic polarization leads to an opening of a tunable Zeeman gap of up to 100 meV around the Dirac point of the Rashba bands, coupled with a change in spin texture by entanglement of magnetic and spin-orbit order. Through applications of magnetic fields, we demonstrate manipulation of spin- texture by spin resolved photoemission experiments, which is also expected for electric fields based on the multiferroic coupling. The control of spin helicity of the bands and its locking to ferromagnetic and ferroelectric order opens fascinating new avenues for highly multifunctional multiferroic Rashba devices suited for reprogrammable logic and/or nonvolatile memory applications.
description: 10 pages, 4 figures
Long Pulse Modulators
Creators: name: Eckoldt, H-J.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: Long pulse modulators are used to produce high-voltage, high-power pulses with durations of several hundred microseconds up to some milliseconds. The loads are one or more klystrons for producing RF power to accelerate the particle beam in superconducting cavities. After years of development and improvements in different institutes a variety of topologies exist, and are presented. The basics of modulators, pulse requirements and klystrons are explained. Additionally, the charging of internal energy storage will be addressed. The outlook for future developments is given.
description: 28 pages, contribution to the 2014 CAS - CERN Accelerator School: Power Converters, Baden, Switzerland, 7-14 May 2014
Early Output Hybrid Input Encoded Asynchronous Full Adder and Relative-Timed Ripple Carry Adder
Creators: name: Balasubramanian, P
name: Prasad, K
Publisher: name: arXiv
Year: 2016
Subjects: subject: Hardware Architecture (cs.AR)
subject: FOS: Computer and information sciences

description: This paper presents a new early output hybrid input encoded asynchronous full adder designed using dual-rail and 1-of-4 delay-insensitive data codes. The proposed full adder when cascaded to form a ripple carry adder (RCA) necessitates the use of a small relative-timing assumption with respect to the internal carries, which is independent of the RCA size. The forward latency of the proposed hybrid input encoded full adder based RCA is data-dependent while its reverse latency is the least equaling the propagation delay of just one full adder. Compared to the best of the existing hybrid input encoded full adders based 32-bit RCAs, the proposed early output hybrid input encoded full adder based 32-bit RCA enables respective reductions in forward latency and area by 7.9% and 5.6% whilst dissipating the same average power; in terms of the theoretically computed cycle time, the latter reports a 10.9% reduction compared to the former.
New insights on the formation of supersaturated solid solutions in the Cu Cr system deformed by high pressure torsion
Creators: name: Bachmaier, Andrea
name: Rathmayr, Georg Benedikt
name: Apel, Daniel
name: Bartosik, Matthias
name: Zhang, Zaoli
name: Pippan, Reinhard
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In the Cu Cr system, the formation of supersaturated solid solutions can be obtained by severe plastic deformation. Energy dispersive synchrotron diffraction measurements on as deformed Cu Cr samples as a function of the applied strain during deformation confirm the formation of supersaturated solid solutions in this usually immiscible system. Due to evaluation of the diffraction data by a newly developed energy dispersive Rietveld program, lattice parameter and microstructural parameters such as domain size and microstrain are determined for as deformed as well as annealed samples. The obtained information is used to deepen the understanding of the microstructural evolution and the formation of supersaturated solid solutions during severe plastic deformation. Complimentary transmission electron microscopy investigations are furthermore performed to characterize the evolving microstructure in detail. After annealing at elevated temperatures, the formed solid solutions decompose. Compared to the as deformed state, an enhanced hardness combined with a high thermal stability is observed. Possible mechanisms for the enhanced hardness are discussed.
piRNA expression profile during odontoblastic differentiation of mDPCs
Creators: name: 邢欣慧(Xing Xinhui)
Publisher: name: CNGB
Year: 2023
Subjects: Genome sequencing and assembly
Monoisolate
Medical

description: mDPCs were incubated with a classic and most commonly used odontogenic medium for 9 days in vitro. Then they were compared with the uninduced cells cultured in DMEM medium. Total RNA from different samples was isolated for Small RNA sequencing and expression profile screening of piRNA in mDPCs. They were performed in BGISEQ-500 sequencing system by Beijing Genomics Institution (BGI), China.
Radiation Risks and Mitigation in Electronic Systems
Creators: name: Todd, B.
name: Uznanski, S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: Electrical and electronic systems can be disturbed by radiation-induced effects. In some cases, radiation-induced effects are of a low probability and can be ignored; however, radiation effects must be considered when designing systems that have a high mean time to failure requirement, an impact on protection, and/or higher exposure to radiation. High-energy physics power systems suffer from a combination of these effects: a high mean time to failure is required, failure can impact on protection, and the proximity of systems to accelerators increases the likelihood of radiation-induced events. This paper presents the principal radiation-induced effects, and radiation environments typical to high-energy physics. It outlines a procedure for designing and validating radiation-tolerant systems using commercial off-the-shelf components. The paper ends with a worked example of radiation-tolerant power converter controls that are being developed for the Large Hadron Collider and High Luminosity-Large Hadron Collider at CERN.
description: 19 pages, contribution to the 2014 CAS - CERN Accelerator School: Power Converters, Baden, Switzerland, 7-14 May 2014
Asynchronous Integration of Real-Time Simulators for HIL-based Validation of Smart Grids
Creators: name: Gavriluta, Catalin
name: Lauss, Georg
name: Strasser, Thomas I.
name: Montoya, Juan
name: Brandl, Ron
name: Kotsampopoulos, Panos
Publisher: name: arXiv
Year: 2023
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: As the landscape of devices that interact with the electrical grid expands, also the complexity of the scenarios that arise from these interactions increases. Validation methods and tools are typically domain specific and are designed to approach mainly component level testing. For this kind of applications, software and hardware-in-the-loop based simulations as well as lab experiments are all tools that allow testing with different degrees of accuracy at various stages in the development life-cycle. However, things are vastly different when analysing the tools and the methodology available for performing system-level validation. Until now there are no available well-defined approaches for testing complex use cases involving components from different domains. Smart grid applications would typically include a relatively large number of physical devices, software components, as well as communication technology, all working hand in hand. This paper explores the possibilities that are opened in terms of testing by the integration of a real-time simulator into co-simulation environments. Three practical implementations of such systems together with performance metrics are discussed. Two control-related examples are selected in order to show the capabilities of the proposed approach.
description: IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society
Massively Multiplexed Spectroscopy with the Prime Focus Spectrograph in the Era of JWST and Roman
Creators: name: Greene, Jenny
Publisher: name: Zenodo
Year: 2023
Subjects: Surveys of Nearby Galaxies

description: The results emerging from JWST are changing our understanding of galaxy evolution in profound and exciting ways, but still over very limited sky area. With the advent of the Roman Space Telescope, we will have the field-of-view needed to add environment. An important component of surveying large sky areas into the 2020s will remain massively multiplexed spectroscopy from the ground, which would provide critical calibrations for the Roman Grism data, as well as bluer coverage for Roman galaxies. I will describe the Prime Focus Spectrograph Galaxy Evolution Survey, scheduled to begin in 2024, and ways in which it would complement and enhance the High Latitude Survey, as well as provide a feeder to JWST for exciting detailed follow-up.
On the role of Sm in solidification of Al-Sm metallic glasses
Creators: name: Bokas, G. B.
name: Zhao, L.
name: Perepezko, J. H.
name: Szlufarska, I.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: During the solidification of Al-Sm metallic glasses the evolution of the supercooled liquid atomic structure has been identified with an increasing population of icosahedral-like clusters with increasing Sm concentration. These clusters exhibit slower kinetics compared to the remaining clusters in the liquid leading to enhanced amorphous phase stability and glass forming ability (GFA). Maximum icosahedral-ordering and atomic packing density have been found for the Al90Sm10 and Al85Sm15 alloys, respectively, whereas minimum cohesive energy has been found for the Al93Sm7 which is consistent with the range of compositions (from Al92Sm8 to Al84Sm16) found experimentally with high GFA.
Circular pentagons and real solutions of Painleve VI equations
Creators: name: Eremenko, Alexandre
name: Gabrielov, Andrei
Publisher: name: arXiv
Year: 2016
Subjects: subject: Complex Variables (math.CV)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 34M55, 30C20

description: We study real solutions of a class of Painleve VI equations. To each such solution we associate a geometric object, a one-parametric family of circular pentagons. We describe an algorithm which permits to compute the numbers of zeros, poles, 1-points and fixed points of the solution on the interval x>1 and their mutual position. The monodromy of the associated linear equation and parameters of the Painleve VI equation are easily recovered from the family of pentagons.
description: 55 pages, 24 figures
Impact of Excitation and Weighting Errors on Performance of Compact OTA Testing Systems
Creators: name: Ruiz, Alejandro Antón
name: Glazunov, Andrés Alayón
Publisher: name: arXiv
Year: 2023
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper investigates the impact of complex excitation errors of the chamber array antenna on the accuracy of the test zone of a random line-of-sight over-the-air testing setup. First, several combinations of compact chamber arrays of lengths L and short distances D between the test zone and the chamber array, which emulate a plane wave impinging at the test zone are obtained. The chamber array is linear and uniform with 100 antenna elements, and a linear taper was applied to some of the elements to emulate a plane wave impinging at the test zone with more compact setups. A subset of L and D was chosen, providing compact over-the-air test setups that fulfilled the defined figures of merit, which assess the similarity of the obtained field distribution to that of a plane wave. The tolerance of the chosen setups to complex excitation errors of the chamber array was then investigated, concluding that these errors must be considered when defining appropriate L and D combinations. Moreover, the performance of the matched filter and zero-forcing algorithms is evaluated for errors of the device under test array weighting coefficients. A random line-of-sight over-the-air testing setup with two arrays was simulated, where one of the arrays emulated the desired signal and the other emulated the interference, observing that the errors were more significant at higher signal-to-noise ratios. Additionally, the zero-forcing algorithm was more sensitive to errors than the matched filter, which was expected since the accuracy of the former for interference suppression is critical.
description: EuCAP2023 conference
Towards a Systematic Approach for Smart Grid Hazard Analysis and Experiment Specification
Creators: name: Smith, Paul
name: Piatkowska, Eva
name: Widl, Edmund
name: Andrén, Filip Pröstl
name: Strasser, Thomas I.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: The transition to the smart grid introduces complexity to the design and operation of electric power systems. This complexity has the potential to result in safety-related losses that are caused, for example, by unforeseen interactions between systems and cyber-attacks. Consequently, it is important to identify potential losses and their root causes, ideally during system design. This is non-trivial and requires a systematic approach. Furthermore, due to complexity, it may not possible to reason about the circumstances that could lead to a loss; in this case, experiments are required. In this work, we present how two complementary deductive approaches can be usefully integrated to address these concerns: Systems Theoretic Process Analysis (STPA) is a systems approach to identifying safety-related hazard scenarios; and the ERIGrid Holistic Test Description (HTD) provides a structured approach to refine and document experiments. The intention of combining these approaches is to enable a systematic approach to hazard analysis whose findings can be experimentally tested. We demonstrate the use of this approach with a reactive power voltage control case study for a low voltage distribution network.
description: 2020 IEEE 18th International Conference on Industrial Informatics (INDIN)
Risk and Machine Protection for Stored Magnetic and Beam Energies
Creators: name: Todd, B.
name: Kwiatkowski, M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: Risk is a fundamental consideration when designing electronic systems. For most systems a view of risk can assist in setting design objectives, whereas both a qualitative and quantitative understanding of risk is mandatory when considering protection systems. This paper gives an overview of the risks due to stored magnetic and beam energies in high-energy physics, and shows how a risk-based approach can be used to design new systems mitigating these risks, using a lifecycle inspired by IEC 61508. Designing new systems in high-energy physics can be challenging as new and novel techniques are difficult to quantify and predict. This paper shows how the same lifecycle approach can be used in reverse to analyse existing systems, following their operation and first experiences.
description: 19 pages, contribution to the 2014 CAS - CERN Accelerator School: Power Converters, Baden, Switzerland, 7-14 May 2014
Stability Studies for Photovoltaic Integration using Power Hardware-in-the-Loop Experiments
Creators: name: Papadimitriou, Christina N.
name: Charalambous, Chrysanthos
name: Armenakis, Andreas
name: Miletic, Zoran
name: Tremmel, Werner
name: Banjac, Anja
name: Strasser, Thomas I.
name: Efthymiou, Venizelos
name: Georghiou, George E.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The electrical power network is gradually migrating from a centralized generation approach to a decentralized generation with high shares of renewable energy sources (RES). However, power systems with low shares of synchronous generation and consequently low total system inertia, are vulnerable to power imbalances. Such systems can experience frequency stability problems, such as high frequency excursions and higher rates of change of frequency even under small disturbances. This phenomenon is intensified when the grid under investigation has low or no interconnections (islanded) and thus the challenge for stable operation becomes more significant for the operators. This work focuses on how the frequency stability is affected when a photovoltaic (PV) inverter is integrated into a real non-interconnected distribution grid in Cyprus. In order to capture the realistic interactions of this integration, stability experiments in a hardware-in-the-loop (HIL) environment are performed with the aim to provide insightful results for the grid operator.
description: The 12th Mediterranean Conference on Power Generation, Transmission, Distribution and Energy Conversion (MEDPOWER 2020)
Review of the Fingerprint Liveness Detection (LivDet) competition series: 2009 to 2015
Creators: name: Ghiani, Luca
name: Yambay, David A.
name: Mura, Valerio
name: Marcialis, Gian Luca
name: Roli, Fabio
name: Schuckers, Stephanie A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: A spoof attack, a subset of presentation attacks, is the use of an artificial replica of a biometric in an attempt to circumvent a biometric sensor. Liveness detection, or presentation attack detection, distinguishes between live and fake biometric traits and is based on the principle that additional information can be garnered above and beyond the data procured by a standard authentication system to determine if a biometric measure is authentic. The goals for the Liveness Detection (LivDet) competitions are to compare software-based fingerprint liveness detection and artifact detection algorithms (Part 1), as well as fingerprint systems which incorporate liveness detection or artifact detection capabilities (Part 2), using a standardized testing protocol and large quantities of spoof and live tests. The competitions are open to all academic and industrial institutions which have a solution for either softwarebased or system-based fingerprint liveness detection. The LivDet competitions have been hosted in 2009, 2011, 2013 and 2015 and have shown themselves to provide a crucial look at the current state of the art in liveness detection schemes. There has been a noticeable increase in the number of participants in LivDet competitions as well as a noticeable decrease in error rates across competitions. Participants have grown from four to the most recent thirteen submissions for Fingerprint Part 1. Fingerprints Part 2 has held steady at two submissions each competition in 2011 and 2013 and only one for the 2015 edition. The continuous increase of competitors demonstrates a growing interest in the topic.
Distances with Surface Brightness Fluctuations (SBF) and Globular Cluster Luminosity Functions (GCLF) with JWST and Roman
Creators: name: Hazra, Nandini
Publisher: name: Zenodo
Year: 2023
Subjects: Surveys of Nearby Galaxies

description: Analysis of Surface Brightness Fluctuations (SBF) and Globular Cluster Luminosity Functions (GCLF) in the optical band can provide extremely accurate distances up to 100 Mpc, while distances up to twice as large can be reached using near-infrared wavelengths. The SBF method is especially valuable for Cosmology in the era of large surveys, with distances accurate up to 3%. JWST will enable the extension of SBF studies up to 300 Mpc, with the expansion of both SBF and GCLF analyses into infrared wavelengths beyond the limit of ~2.2 microns covered by previous studies. We are currently testing an original procedure for analysing SBF and GCLF using JWST open-access data. The procedure has already been tested on HST/ACS data for a galaxy in the Hydra I cluster, where it was used to characterise the globular cluster population and measure the distance of PGC 087327. One major issue in SBF studies has been the complexity of measurements, which require extensive human input and have made it inaccessible as a tool for the larger community. To address this, we have developed and are currently testing a procedure that utilises entirely free and open-source tools, and performs SBF analysis with minimal human intervention. This pipeline naturally produces valuable results for globular cluster science as an auxiliary product, and has been built to adapt well across different instruments. We aim to automate this procedure for high-accuracy distance measurements, making it accessible to the community during the joint operations of Rubin, JWST, and Roman.
Ancilla-Input and Garbage-Output Optimized Design of a Reversible Quantum Integer Multiplier
Creators: name: HV, Jayashree
name: Thapliyal, Himanshu
name: Arabnia, Hamid R.
name: Agrawal, V K
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: Emerging Technologies (cs.ET)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: A reversible logic has application in quantum computing. A reversible logic design needs resources such as ancilla and garbage qubits to reconfigure circuit functions or gate functions. The removal of garbage qubits and ancilla qubits are essential in designing an efficient quantum circuit. In the literature, there are multiple designs that have been proposed for a reversible multiplication operation. A multiplication hardware is essential for the circuit design of quantum algorithms, quantum cryptanalysis, and digital signal processing (DSP) applications. The existing designs of reversible quantum integer multipliers suffer from redundant garbage qubits. In this work, we propose a reversible logic based, garbage-free and ancilla qubit optimized design of a quantum integer multiplier. The proposed quantum integer multiplier utilizes a novel add and rotate methodology that is specially suitable for a reversible computing paradigm. The proposed design methodology is the modified version of a conventional shift and add method. The proposed design of the quantum integer multiplier incorporates add or no operation based on multiplier qubits and followed by a rotate right operation. The proposed design of the quantum integer multiplier produces zero garbage qubits and shows an improvement ranging from 60% to 90% in ancilla qubits count over the existing work on reversible quantum integer multipliers.
Data-Driven Allocation of Preventive Care With Application to Diabetes Mellitus Type II
Creators: name: Kraus, Mathias
name: Feuerriegel, Stefan
name: Saar-Tsechansky, Maytal
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Problem Definition. Increasing costs of healthcare highlight the importance of effective disease prevention. However, decision models for allocating preventive care are lacking. Methodology/Results. In this paper, we develop a data-driven decision model for determining a cost-effective allocation of preventive treatments to patients at risk. Specifically, we combine counterfactual inference, machine learning, and optimization techniques to build a scalable decision model that can exploit high-dimensional medical data, such as the data found in modern electronic health records. Our decision model is evaluated based on electronic health records from 89,191 prediabetic patients. We compare the allocation of preventive treatments (metformin) prescribed by our data-driven decision model with that of current practice. We find that if our approach is applied to the U.S. population, it can yield annual savings of $1.1 billion. Finally, we analyze the cost-effectiveness under varying budget levels. Managerial Implications. Our work supports decision-making in health management, with the goal of achieving effective disease prevention at lower costs. Importantly, our decision model is generic and can thus be used for effective allocation of preventive care for other preventable diseases.
description: Accepted by Manufacturing & Service Operations Management
MPEC 2023-K207 : 2023 KH5
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2023 KH5

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Arrays of coupled chemical oscillators
Creators: name: Forrester, Derek Michael
Publisher: name: arXiv
Year: 2016
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Oscillating chemical reactions result from complex periodic changes in the concentration of the reactants. In spatially ordered ensembles of candle flame oscillators the fluctuations in the ratio of oxygen atoms with respect to that of carbon, hydrogen and nitrogen produces an oscillation in the visible part of the flame related to the energy released per unit mass of oxygen. Thus, the products of the reaction vary in concentration as a function of time, giving rise to an oscillation in the amount of soot and radiative emission. Synchronisation of interacting dynamical sub-systems occurs as arrays of flames that act as master and slave oscillators, with groups of candles numbering greater than two, creating a synchronised motion in three-dimensions. In a ring of candles the visible parts of each flame move together, up and down and back and forth, in a manner that appears like a "worship". Here this effect is shown for rings of flames which collectively empower a central flame to pulse to greater heights. In contrast, situations where the central flames are suppressed are also found. The phenomena leads to in-phase synchronised states emerging between periods of anti-phase synchronisation for arrays with different columnar sizes of candle and positioning.
description: 8 pages, 4 figures
AutoAssign+: Automatic Shared Embedding Assignment in Streaming Recommendation
Creators: name: Liu, Ziru
name: Chen, Kecheng
name: Song, Fengyi
name: Chen, Bo
name: Zhao, Xiangyu
name: Guo, Huifeng
name: Tang, Ruiming
Publisher: name: arXiv
Year: 2023
Subjects: subject: Information Retrieval (cs.IR)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: In the domain of streaming recommender systems, conventional methods for addressing new user IDs or item IDs typically involve assigning initial ID embeddings randomly. However, this practice results in two practical challenges: (i) Items or users with limited interactive data may yield suboptimal prediction performance. (ii) Embedding new IDs or low-frequency IDs necessitates consistently expanding the embedding table, leading to unnecessary memory consumption. In light of these concerns, we introduce a reinforcement learning-driven framework, namely AutoAssign+, that facilitates Automatic Shared Embedding Assignment Plus. To be specific, AutoAssign+ utilizes an Identity Agent as an actor network, which plays a dual role: (i) Representing low-frequency IDs field-wise with a small set of shared embeddings to enhance the embedding initialization, and (ii) Dynamically determining which ID features should be retained or eliminated in the embedding table. The policy of the agent is optimized with the guidance of a critic network. To evaluate the effectiveness of our approach, we perform extensive experiments on three commonly used benchmark datasets. Our experiment results demonstrate that AutoAssign+ is capable of significantly enhancing recommendation performance by mitigating the cold-start problem. Furthermore, our framework yields a reduction in memory usage of approximately 20-30%, verifying its practical effectiveness and efficiency for streaming recommender systems.
Thermal Design of Power Electronic Circuits
Creators: name: Künzi, R.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: The heart of every switched mode converter consists of several switching semiconductor elements. Due to their non-ideal behaviour there are ON state and switching losses heating up the silicon chip. That heat must effectively be transferred to the environment in order to prevent overheating or even destruction of the element. For a cost-effective design, the semiconductors should be operated close to their thermal limits. Unfortunately the chip temperature cannot be measured directly. Therefore a detailed understanding of how losses arise, including their quantitative estimation, is required. Furthermore, the heat paths to the environment must be understood in detail. This paper describes the main issues of loss generation and its transfer to the environment and how it can be estimated by the help of datasheets and/or experiments.
description: 17 pages, contribution to the 2014 CAS - CERN Accelerator School: Power Converters, Baden, Switzerland, 7-14 May 2014
OBJECT AND SUBJECTS OF INNOVATION ACTIVITY
Creators: name: Nasrulloyev Feruz Furkatovich Manager of ATIB Ipoteka bank Samarkand branch
Publisher: name: Zenodo
Year: 2024

description: Investors themselves have the right to choose one or more areas of innovation activity. No one can force them to choose a field of activity or objects of innovation. Investors themselves make decisions about choosing a particular area and investing in innovations in a certain area. Subjects of innovation activity can be one investor, several investor-participants carrying out entrepreneurial and other activities.

Key words: Innovation, innovation activity, objects of innovation, subjects of innovation, modernization, investments, capital investments
Regular Expressions in a CS Formal Languages Course
Creators: name: Morazán, Marco T.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Programming Languages (cs.PL)
subject: Formal Languages and Automata Theory (cs.FL)
subject: FOS: Computer and information sciences

description: Regular expressions in an Automata Theory and Formal Languages course are mostly treated as a theoretical topic. That is, to some degree their mathematical properties and their role to describe languages is discussed. This approach fails to capture the interest of most Computer Science students. It is a missed opportunity to engage Computer Science students that are far more motivated by practical applications of theory. To this end, regular expressions may be discussed as the description of an algorithm to generate words in a language that is easily programmed. This article describes a programming-based methodology to introduce students to regular expressions in an Automata Theory and Formal Languages course. The language of instruction is FSM in which there is a regular expression type. Thus, facilitating the study of regular expressions and of algorithms based on regular expressions.
description: In Proceedings TFPIE 2023, arXiv:2308.06110