cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Smart Grid as New Energy Paradigm Slides
Creators: Haitham Abu-Rub
Publisher: name: IEEE
Year: 2018

PELS Webinar Slides
The smart grid has been called electricity with a brain, the energy Internet and the Electronet.  Basically, the smart grid integrates electricity and information and communication infrastructures to create electric system that is more secure, reliable, stabile, efficient, and safety. The smart grid is the new energy paradigm that is characterized by a bidirectional flow of electricity and information. Hence, the transformation from conventional grid to smart grid requires a paradigm shift in representing electric grid structure and operation. However, there are lots of challenges on the way of implementing smart grid at national, regional and global levels. These challenges include Acceptability, Controllability, Interoperability & Interchangeability, Scalability, and Security.

The demonstration of these challenges is essential for understanding and successful implementation and operation of the smart grid at all levels.

Therefore, the talk will focus on presenting the future energy paradigm and the way to transform current grid into smart grid. The elements of smart grid and challenges behind its implementation will be discussed. Enabling technologies, current status and the future prospective will be discussed.
All SiC High Power Converters for Combined Integration of Solar PV and Energy Storage-Slides
Creators: Juan Carlos Balda & Yue Zhao
Publisher: name: IEEE
Year: 2021

PELS Webinar Slides
Abstract: Distributed generation is becoming more prevalent in electric power distribution systems as costs are reaching grid parity, in particular for solar generation. At the same time, the need for energy storage is becoming more important since peak generations very often do not coincide with peak demands. Therefore, developing grid interfaces based on power electronics that combine solar generation and energy storage is of interest. In this webinar, a case study will be presented on the design and validation of an all silicon carbide (SiC) 150-kW triple-active-bridge (TAB) converter stage for combined integration of solar array and energy storage. The detailed design methodology used for power electronics building blocks (e.g., the H-bridge converters and active-neutral-point-clamped (ANPC) using 1.7kV SiC modules), and the 20-kHz three-port transformer will be presented together with experimental results on the built prototype. In addition, a design case study of a 4.16kV grid-tied inverter using the TAB converters will be presented.
Experimental Observation of the Inverse Proximity Effect in Superconductor/Ferromagnet Layered Structures
Creators: name: Salikhov, R. I.
name: Garifullin, I. A.
name: Garif'yanov, N. N.
name: Tagirov, L. R.
name: Theis-Broehl, K.
name: Westerholt, K.
name: Zabel, H.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We have studied the nuclear magnetic resonance (NMR) of 51V nuclei in the superconductor/ferromagnet thin film heterostructures Ni/V/Ni and Pd{1-x}Fe{x}/V/Pd{1-x}Fe{x} in the normaland superconducting state. Whereas the position and shape of the NMR line in the normal state for the trilayers is identical to that observed in a single V-layer, in the superconducting state the line shape definitely changes, developing a systematic distortion of the high-field wing of the resonance line. We consider this as the first experimental evidence for the penetration of ferromagnetism into the superconducting layer, a phenomenon which has been theoretically predicted recently and dubbed the inverse proximity effect.
description: about 5 pages, 3 figures, 1 table
Characterization of chlorohydridobis (tertiaryphosphine) ruthenium (II) complexes, and their use as homogeneous hydrogenation catalysts
Creators: name: Thorburn, Ian Stuart
Publisher: name: University of British Columbia
Year: 2010

description: The thesis describes a study of the catalytic hydrogenation of an olefinic substrate by the complex hydridochlorobis(triphenylphosphine) ruthenium(II) and an investigation of the complex in the solid state and in solution. The visible spectra of the complex, (HRuCl(PPh₃)₂)₂, at a series of concentrations showed that Beer's law is not obeyed, and that in solution a dissociative equilibrium exists: (1) (HRuCl(PPh₃)₂)₂ K ⇆ (2HRuCl(PPh₃)₂ The complex in N,N-dimethylacetamide solution was found to be an effective catalyst for the homogeneous hydrogenation of hex-l-ene. A detailed kinetic study on this system revealed a mechanism involving initial formation of a σ-alkyl intermediate which then reacts with molecular hydrogen to produce the saturated product and regenerate the catalyst: (2) HRuCl(PPh₃)₂ + olefin k₁ ⇆ k₋₁ RuCl(PPh₃)₂(alkyl) (3) HRuCl(PPh₃)₂(alkyl) + H₂ k₂→ HRuCl(PPh₃)₂ + alkane. The mechanism is quite different from that reported for the same catalyst system but using acrylamide as substrate, thereby showing that the nature of the substrate can have a pronounced affect on the course of hydrogenation. Addition of triphenylphosphine and lithium chloride to the (HRuCl(PPh₃)₂)₂- hex-l-ene system were found to decrease and increase the rate of hydrogenation, retrospectively. The added phosphine likely competes with the olefinic substrate for a coordination site; the role of the chloride ion is more uncertain, but a more active catalyst containing more than one chloride ligand is the most obvious rationale. To enhance the solubility of this hydridophosphine type catalyst the tri-p-tolylphosphine analogue of the triphenylphosphine complex was prepared; the variable temperature ¹H and ³¹P{¹H}-solution n.m.r. of the (HRuCl(P(p-tolyl)₃)₂)₂ complex showed the presence of both monomer and fluxional dimer. Addition of dimethyl maleate to the complex in order to obtain a Ru-alkyl species (equation (2)) gave very complex spectra which could not be interpreted in terms of a single species, but there was some evidence for a hydrido(olefin) species rather than an alkyl. An x-ray analysis of the p-tolyl complex confirmed the expected chloro-bridged dimeric structure of these hydridochlorobis(phosphine) species. There is a square pyramidal coordination geometry about each ruthenium atom, and two such centres share a basal edge, but the molecule has no symmetry as a result of the small hydride ligands allowing distortion.
Designing reliable and high-density power solutions with GaN Slides
Creators: Masoud Beheshti
Publisher: name: IEEE
Year: 2017

PELS Webinar Slides
Gallium nitride (GaN) once thought of as just a cool new technology, is forever changing the way power engineers are designing for density and efficiency. GaN based solutions not only make power supplies faster, smaller and cooler, but also meet the industry demand for ruggedness and system solution cost. This webinar provides an in depth overview of how GaN is making this possible, along  with practical design examples including power factor correction (PFC), HV isolated DC/DC converter, and lower voltage DC power supplies.
Enhanced stability of tetratic phase due to clustering
Creators: name: Martinez-Raton, Yuri
name: Velasco, Enrique
Publisher: name: arXiv
Year: 2008
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We show that the relative stability of the nematic tetratic phase with respect to the usual uniaxial nematic phase can be greatly enhanced by clustering effects. Two--dimensional rectangles of aspect ratio $κ$ interacting via hard interactions are considered, and the stability of the two nematic phases (uniaxial and tetratic) is examined using an extended scaled--particle theory applied to a polydispersed fluid mixture of $n$ species. Here the $i$--th species is associated with clusters of $i$ rectangles, with clusters defined as stacks of rectangles containing approximately parallel rectangles, with frozen internal degrees of freedom. The theory assumes an exponential cluster size distribution (an assumption fully supported by Monte Carlo simulations and by a simple chemical--reaction model), with fixed value of the second moment. The corresponding area distribution presents a shoulder, and sometimes even a well-defined peak, at cluster sizes approximately corresponding to square shape (i.e. $i\simeqκ$), meaning that square clusters have a dominant contribution to the free energy of the hard--rectangle fluid. The theory predicts an enhanced region of stability of the tetratic phase with respect to the standard scaled--particle theory, much closer to simulation and to experimental results, demonstrating the importance of clustering in this fluid.
description: 9 pages, 9 figures
ISGT Europe 2018 - Industry Trends, Opportunities, and Innovations for the Grid of Future
Creators: E. Bajrektarevic
C. Root
S. Bahramirad
B. Meyer
D. Bago
Publisher: name: IEEE
Year: 2018

Panel Session
The business of energy never stands still. Changes in technology, market demand, and regulations require today�s utilities to constantly innovate, adapt and evolve. This plenary session covers the state of the art in the technology solutions and the future innovative session covers the state of the art in the technology solutions and the future innovative solutions needed to capture the benefits and mitigate the challenges associated with the evolving energy industry.
A robust floating nanoammeter
Creators: name: Sauer, B. E.
name: Kara, D. M.
name: Hudson, J. J.
name: Tarbutt, M. R.
name: Hinds, E. A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: A circuit capable of measuring nanoampere currents while floating at voltages up to at least 25kV is described. The circuit relays its output to ground potential via an optical fiber. We particularly emphasize the design and construction techniques which allow robust operation in the presence of high voltage spikes and discharges.
description: 5 pages, 2 figures
Universal diffusive decay of correlations in gapped one-dimensional systems
Creators: name: Rapp, Akos
name: Zarand, Gergely
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We apply a semiclassical approach to express finite temperature dynamical correlation functions of gapped spin models analytically. We show that the approach of [A. Rapp, G. Zarand, Phys. Rev. B 74, 014433 (2006)] can also be used for the S=1 antiferromagnetic Heisenberg chain, whose lineshape can be measured experimentally. We generalize our calculations to O(N) quantum spin models and the sine-Gordon model in one dimension, and show that in all these models, the finite temperature decay of certain correlation functions is characterized by the same universal semiclassical relaxation function.
description: 7 pages, 5 figures, final version appeared in Eur. Phys. J. B 67, 7-13 (2009)
Induced gravity and gauge interactions revisited
Creators: name: Broda, Bogusław
name: Szanecki, Michał
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: It has been shown that the primary, old-fashioned idea of Sakharov's induced gravity and gauge interactions, in the "one-loop dominance" version, works astonishingly well yielding phenomenologically reasonable results. As a byproduct, the issue of the role of the UV cutoff in the context of the induced gravity has been reexamined (an idea of self-cutoff induced gravity). As an additional check, the black hole entropy has been used in the place of the action. Finally, it has been explicitly shown that the induced coupling constants of gauge interactions of the standard model assume qualitatively realistic values.
description: 15 pages, 2 figures (including 1 table); improved version - final
$α$-vacuum and inflationary bispectrum
Creators: name: Xue, Wei
name: Chen, Bin
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper, we discuss the non-Guassianity originated from the $α$-vacuum on the CMB anisotropy. For $α$-vacuum, there exist correlation between points in the acausal two patches of de Sitter spactime. Such kind of correlation can lead to large local form non-Guassianity in $α$-vacuum. For the single field slow-roll inflationary scenario, the spacetime is in a quasi-de Sitter phase during the inflation. We will show that the $α$-vacuum in this case will lead to non-Gaussianity with distinguished feature, of a large local form and a very different shape.
description: 39 pages, 8 figures, references added, minor changes, accepted by Phys.Rev.D
Formulation of Time-Resolved Counting Statistics Based on a Positive-Operator-Valued Measure
Creators: name: Bednorz, Adam
name: Belzig, Wolfgang
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We propose a derivation of the full counting statistics of electronic current based on a positive-operator-valued measure. Our approach justifies the Levitov-Lesovik formula in the long-time limit, but can be generalized to the detection of finite-frequency noise correlations. The combined action of the projection postulate and the quantum formula for current noise at high frequencies imply an additional white noise. Estimates for this additional noise are in accordance with known experiments. We propose an experimental test of our conjecture by a simultaneous measurement of high- and low-frequency noise.
description: 4 pages, 1 figure
Advanced Modeling Approach for Magnetic Material and Components-Slides
Creators: Helen Cui
Publisher: name: IEEE
Year: 2020

PELS Webinar Slides
Abstract: Magnetic material and component structures that favor the trend towards planarization, chip-scale integration, and novel magnetic packaging become the most promising direction of facilitating the development of future power electronics and RF systems. However, conventional design and modeling of magnetic components largely reply on behavioral-level regression methodologies that are inadequate to provide theoretical guidance and feasibility for advanced applications. This talk starts from the external characteristics of magnetic components, and then shifts from macroscopic performance to microscopic behavior for magnetic materials in order to reveal the hierarchy of interactions between material properties and component applications. The modeling techniques not only provide powerful tools for analyzing magnetic-related issues in the next generation of high-frequency and high-density power electronics with wide-bandgap devices; but also inspire cross-disciplinary applications such as magnetic-molded packaging, ferromagnetic-resonance wireless power transfer, and multiferroic antennas.
Catocala frederici Grote
Creators: name: Hawks, David
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Noctuidae
Catocala
Catocala frederici

description: Catocala frederici Grote Figs 7, 8 Catocala frederici Grote, 1872: 14. Type material. Catocala frederici: lectotype ♀ [ZMHU, examined], designated by Gall and Hawks (2002: 246). Type locality: Texas, [USA]. Diagnosis. The ventral surface of the forewing and both surfaces of the hindwing are similar in both C. frederici and C. caesia, although the patterning is less distinct in C. frederici compared to C. caesia. However, the even, generally pale-gray appearance of the forewing upperside in C. frederici is distinctive. The black hindwing bands tend to be narrower in C. frederici than in C. caesia. Distribution and biology. Southwestern USA, from east-central Kansas and western Texas, westward to southeastern Arizona. County records for USA are as follows. ARIZONA: Cochise; KANSAS: Douglas, Riley; NEW MEXICO: Bernalillo, Dona Ana, Eddy, Lincoln, Otero, Sandoval, San Miguel; COLORADO: Baca; OKLAHO- MA: Cimarron, Kiowa; TEXAS: Blanco, Bosque, Brewster, Burnet, Coke, Coleman, Culberson, Dallas, Dickens, El Paso, Hudspeth, Jeff Davis, Kerr, Kimble, Lubbock, Randall, Uvalde, Vale Verde. Biological notes. Adults have been collected from May to September. Several species of oaks are present at most of the known collecting localities. C. frederici tends to inhabit hotter and drier desert mountain ranges than do C. delilah, C. desdemona and C. caesia.
description: Published as part of Hawks, David, 2010, Review of the Catocala delilah species complex (Lepidoptera, Erebidae), pp. 13-35 in ZooKeys 39 (39) on page 22, DOI: 10.3897/zookeys.39.439, http://zenodo.org/record/576631
description: {"references": ["Grote AR (1872) On the North American species of Catocala. Transactions of the American Entomological Society 4: 1 - 20.", "Gall LF, Hawks DC (2002) Systematics of moths in the genus Catocala (Noctuidae). III. The types of William H. Edwards, Augustus R. Grote, and Achille Guenee. Journal of The Lepidopterists' Society 56: 234 - 264."]}
Magnetic-free traveling-wave nonreciprocal superconducting microwave components
Creators: name: Zhang, Dengke
name: Tsai, Jaw-Shen
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Applied Physics (physics.app-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We propose a design to realize integrated broadband nonreciprocal microwave isolators and circulators using superconducting circuit elements without any magnetic materials. To obtain a broadband response, we develop a waveguide-based design by temporal modulations. The corresponding compact traveling-wave structure is implemented with integrated superconducting composite right-/left-handed transmission lines. The calculations show that the bandwidth of 580 MHz can be realized over a nonreciprocal isolation of 20 dB in reflections. Such on-chip isolators and circulators are useful for cryogenic integrated microwave connections and measurements, such as protecting qubits from the amplified reflected signal in multiplexed readout.
description: 18 pages, 12 figures
Exciton/plasmon polaritons in GaAs/GaAlAs heterostructures near a metallic layer
Creators: name: Bellessa, J.
name: Symonds, C.
name: Meynaud, C.
name: Plenet, J. C.
name: Cambril, E.
name: Miard, A.
name: Ferlazzo, L.
name: Lemaitre, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Optics (physics.optics)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We report on the strong coupling between inorganic quantum well excitons and surface plasmons. For that purpose a corrugated silver film was deposited on the top of a heterostructure consisting of GaAs/GaAlAs quantum wells. The formation of plasmon/heavy-hole exciton/light-hole exciton mixed states is demonstrated with reflectometry experiments. The interaction energies amount to 21 meV for the plasmon/light-hole exciton and 22 meV for the plasmon/heavy-hole exciton. Some particularities of the plasmon-exciton coupling were also discussed and qualitatively related to the plasmon polarization.
description: 5 pages, 5 figures
Statistical Physics of Hard Optimization Problems
Creators: name: Zdeborová, Lenka
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Computational Complexity (cs.CC)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Optimization is fundamental in many areas of science, from computer science and information theory to engineering and statistical physics, as well as to biology or social sciences. It typically involves a large number of variables and a cost function depending on these variables. Optimization problems in the NP-complete class are particularly difficult, it is believed that the number of operations required to minimize the cost function is in the most difficult cases exponential in the system size. However, even in an NP-complete problem the practically arising instances might, in fact, be easy to solve. The principal question we address in this thesis is: How to recognize if an NP-complete constraint satisfaction problem is typically hard and what are the main reasons for this? We adopt approaches from the statistical physics of disordered systems, in particular the cavity method developed originally to describe glassy systems. We describe new properties of the space of solutions in two of the most studied constraint satisfaction problems - random satisfiability and random graph coloring. We suggest a relation between the existence of the so-called frozen variables and the algorithmic hardness of a problem. Based on these insights, we introduce a new class of problems which we named "locked" constraint satisfaction, where the statistical description is easily solvable, but from the algorithmic point of view they are even more challenging than the canonical satisfiability.
description: PhD thesis
A New, Efficient Stellar Evolution Code for Calculating Complete Evolutionary Tracks
Creators: name: Kovetz, Attay
name: Yaron, Ofer
name: Prialnik, Dina
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a new stellar evolution code and a set of results, demonstrating its capability at calculating full evolutionary tracks for a wide range of masses and metallicities. The code is fast and efficient, and is capable of following through all evolutionary phases, without interruption or human intervention. It is meant to be used also in the context of modeling the evolution of dense stellar systems, for performing live calculations for both normal star models and merger-products. The code is based on a fully implicit, adaptive-grid numerical scheme that solves simultaneously for structure, mesh and chemical composition. Full details are given for the treatment of convection, equation of state, opacity, nuclear reactions and mass loss. Results of evolutionary calculations are shown for a solar model that matches the characteristics of the present sun to an accuracy of better than 1%; a 1 Msun model for a wide range of metallicities; a series of models of stellar populations I and II, for the mass range 0.25 to 64 Msun, followed from pre-main-sequence to a cool white dwarf or core collapse. An initial final-mass relationship is derived and compared with previous studies. Finally, we briefly address the evolution of non-canonical configurations, merger-products of low-mass main-sequence parents.
description: MNRAS, in press; several sections and figures revised
Counterparts to the Nuclear Bulge X-ray source population
Creators: name: Gosling, Andrew J.
name: Bandyopadhyay, Reba M.
name: Blundell, Katherine M.
name: Lucas, Phil
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present an initial matching of the source positions of the Chandra Nuclear Bulge X-ray sources to the new UKIDSS-GPS near-infrared survey of the Nuclear Bulge. This task is made difficult by the extremely crowded nature of the region, despite this, we find candidate counterparts to ~50% of the X-ray sources. We show that detection in the J-band for a candidate counterpart to an X-ray source preferentially selects those candidate counterparts in the foreground whereas candidate counterparts with only detections in the H and K-bands are more likely to be Nuclear Bulge sources. We discuss the planned follow-up for these candidate counterparts.
description: 5 pages, 2 figures, 1 table, published in the proceedings of "A population Explosion", AIP Conference Proceedings Volume 1010, pp. 117-121
The topological Dirac equation of networks and simplicial complexes
Creators: name: Bianconi, Ginestra
Publisher: name: arXiv
Year: 2021
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Social and Information Networks (cs.SI)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We define the topological Dirac equation describing the evolution of a topological wave function on networks or on simplicial complexes. On networks, the topological wave function describes the dynamics of topological signals or cochains, i.e. dynamical signals defined both on nodes and on links. On simplicial complexes the wave function is also defined on higher-dimensional simplices. Therefore the topological wave function satisfies a relaxed condition of locality as it acquires the same value along simplices of dimension larger than zero. The topological Dirac equation defines eigenstates whose dispersion relation is determined by the spectral properties of the Dirac (or chiral) operator defined on networks and generalized network structures including simplicial complexes and multiplex networks. On simplicial complexes the Dirac equation leads to multiple energy bands. On multiplex networks the topological Dirac equation can be generalized to distinguish between different mutlilinks leading to a natural definition of rotations of the topological spinor. The topological Dirac equation is here initially formulated on a spatial network or simplicial complex for describing the evolution of the topological wave function in continuous time. This framework is also extended to treat the topological Dirac equation on $1+d$ spaces describing a discrete space-time with one temporal dimension and $d$ spatial dimensions with $d\in \{1,2,3\}$. This work includes also the discussion of numerical results obtained by implementing the topological Dirac equation on simplicial complex models and on real simple and multiplex network data.
description: (34 pages, 5 figures)
Catocala benjamini Brower 1937
Creators: name: Hawks, David
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Noctuidae
Catocala
Catocala benjamini

description: Catocala benjamini Brower Figs 9–14 Catocala andromache race benjamini Brower, 1937: 185 Catocala benjamini ute Peacock & Wagner, 2009: 89 Catocala benjamini jumpi Hawks, ssp. n. Catocala benjamini mayhewi Hawks, ssp. n.
description: Published as part of Hawks, David, 2010, Review of the Catocala delilah species complex (Lepidoptera, Erebidae), pp. 13-35 in ZooKeys 39 (39) on page 22, DOI: 10.3897/zookeys.39.439, http://zenodo.org/record/576631
description: {"references": ["Brower AE (1937) Descriptions of a new species and a new race of Catocala (Lepidoptera: Noctuidae). Bulletin of the Brooklyn Entomological Society 32: 184 - 186.", "Peacock JA, Wagner DL (2009) Catocala benjamini ute n. ssp. From southeastern Utah. Journal of Th e Lepidopterists' Society 63: 89 - 92."]}
High-Density Medium-Voltage SiC-based Modular Power Converters for Naval Applications-Challenges and Solutions-Slides
Creators: Jun Wang
Publisher: name: IEEE
Year: 2020

PELS Webinar Slides
Abstract: SiC-enabled high-power modular converters for medium-voltage (MV) power distribution systems in naval applications have a great potential to achieve notably higher efficiency and power density than their Si predecessors. Such revolutionary improvement is built upon the resolution of critical challenges comprising gate driving, control and sensing, EMI, high-voltage insulation, and thermal management, in a bottom-up manner from the component level to the power-cell level and finally to the converter level.

This seminar presents systematic design solutions to tackle the aforementioned challenges. Enhanced gate drivers and their power supplies, a bi-directional auxiliary power network, and synchronous distribution control systems have been proposed to address low-power-level concerns; a switching-cycle control approach for passive component reduction, a shielded laminated dc-bus, and a partial-discharge-free insulation design method have been proposed to handle high-power-level issues. The electromagnetic interference, as an ubiquitous issue involved in all the designs above, has been carefully contained and mitigated by proposed shielding and coupling minimization techniques. All the solutions have been successfully validated on converter platforms operating continuously with switching transients up to 100 V/ns
A systematic literature review on gender discussion in Spain
Creators: name: Sendra, Mariana
Publisher: name: Zenodo
Year: 2023

description: Este documento de trabajo ofrece una visión general de los resultados obtenidos en un proceso de revisión bibliográfica de la producción académica española centrada en los debates de género entre 2007 y 2023 en el marco del Proyecto UNTWIST "Policy recommendations to regain “losers of feminism” as mainstream voters".

Provee una descripción de las particularidades del contexto local español en cuanto a los conceptos teóricos y perspectivas de género más significativos, la evolución de las principales problemáticas así como aquellas políticas públicas relacionadas con el género en las que es necesario avanzar.
Catocala benjamini subsp. benjamini benjamini Brower 1937
Creators: name: Hawks, David
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Noctuidae
Catocala
Catocala benjamini
Catocala benjamini benjamini brower

description: Catocala benjamini benjamini Brower Fig. 9 Type material. Catocala andromache race benjamini: holotype ♁ [USNM, examined]. Type locality: Mohave County, Arizona, [USA]. Diagnosis. Catocala b. benjamini is similar to C. caesia on the upperside, but the undersides differ (see account for C. caesia above for points of distinction). Nominate C. benjamini is also similar to C. andromache and the only fairly reliable difference in color pattern is that the dorsal forewing of C. andromache tends to have a distinctly greenish cast due to iridescent scales. Most populations of C. benjamini and C. an- Figures 9 – Ι6. Adults of Catocala. 9 C. benjamini benjamini Brower Ι0 C. benjamini ute Peacock & Wagner ΙΙ holotype, C. benjamini jumpi Hawks Ι2 allotype, C. benjamini jumpi Hawks Ι 3 holotype, C. benjamini mayhewi Hawks Ι4 allotype, C. benjamini mayhewi Hawks. dromache are allopatric, although C. benjamini mayhewi and C. andromache occur in sympatry in southern California. Differences between the larvae of C. benjamini and C. andromache were reported by Johnson (1985). Distribution and biology. Southeastern California, Arizona, southern Nevada, and southwestern Utah. County records for USA are as follows. ARIZONA: Apache, Cochise, Coconino, Gila, Graham, Mohave, Maricopa, Navajo, Pima, Yavapai; CALI- FORNIA: San Bernardino; NEVADA: Clark, Lincoln; UTAH: Washington. Adults have been collected from May to September with most from June and July. The immature stages of the nominate subspecies are unknown. However, at several of the known collecting localities (e.g., Hualapai and Pinal Mountains) Quercus turbinella Greene is the only species of oak. Additionally, the known distribution of C. b. benjamini closely coincides with the distribution of Q. turbinella. Like C. frederici, C. b. benjamini primarily inhabits dry desert mountain ranges.
description: Published as part of Hawks, David, 2010, Review of the Catocala delilah species complex (Lepidoptera, Erebidae), pp. 13-35 in ZooKeys 39 (39) on pages 22-23, DOI: 10.3897/zookeys.39.439, http://zenodo.org/record/576631
description: {"references": ["Johnson JW (1985) Th e immature stages of six California Catocala (Lepidoptera: Noctuidae). Journal of Research on the Lepidoptera 23: 303 - 327."]}
Online Prognostic Condition Monitoring for Wind Turbines Using Current Signals Slides
Creators: Wei Qiao
Publisher: name: IEEE
Year: 2019

PELS Webinar Slides
Abstract- This webinar will present the pioneering work conducted by the Power and Energy System Laboratory at the University of Nebraska-Lincoln, Lincoln, NE, USA on low-cost, online, prognostic condition monitoring (PCM) for wind turbines and their mechanical and electrical subassemblies, such as gearbox, bearing, blade, drivetrain, and generator. The PCM methods primarily use current signals acquired from generator terminals or in the power electronic converter control system to online diagnose and prognose the faults and predict the RUL of the wind turbines in all operating conditions. In addition to current signals, the PCM can also be used to include vibration signals in wind turbines to provide additional PCM capability and improved diagnosis and prognosis accuracy. The PCM methods developed have been successfully applied for fault diagnosis and prognosis and RUL prediction of wind turbines of different types and different sizes from kW to MW scale in both the laboratory and field. The PCM methods developed outperformed the state-of-the-art wind turbine condition monitoring technologies in terms of cost, hardware complexity, implementation, accuracy, capability, and reliability. They provide a low-cost, reliable solution for the wind industry to reduce the failure rate and level, O&M costs, and downtime, improve reliability, and extend the life of wind turbines
Designing Integrated Motor Drive with GaN Slides
Creators: Serkan Dusmez
Publisher: name: IEEE
Year: 2019

PELS Webinar Slides
Abstract- As the industry moves towards �smart factory� and next level of automation, the demand for miniaturization of manufacturing equipment to save floor space and reduce the time required to install and commission equipment is becoming more critical.  This presentation discusses how GaN is enabling next generation of highly efficient integrated motor drives. These solutions result in >75% reduction factory floor cabinets while reducing power and communication cabling by more than 90%. An actual design example will be shown and discussed.

Bio- Dr. Serkan Dusmez is the Systems Engineer of the GaN Product Line at Texas Instruments (TI) responsible for the product and roadmap definition of GaN products and the development of high frequency power converters. He has worked on various areas of power electronics including new topologies and control algorithms for next generation power converters. He is the author/coauthor of over 60 IEEE papers.

Dr. Dusmez graduated with a PhD from the University of Texas at Dallas.
Design and Characterization - High Voltage SiC DMOSFETs Slides
Creators: Ranbir Singh
Publisher: name: IEEE
Year: 2019

PELS Webinar Slides
Abstract- Design constraints and operating limits of high voltage SiC DMOSFETs are presented. Low channel mobilities in SiC force MOSFET design points for optimum performance to suffer from short-channel effects.
Static characteristics - forward I-V, threshold voltage are presented.
Switching times of less than 30 nano-seconds were recorded for 2kV
switching. An investigation of the operating limits and failure modes
for SiC DMOSFETs under unclamped inductive switching (UIS) and
short-circuit conditions is performed. Maximum single-pulse avalanche
energies (EAS) of 13.75 J/cm2 and avalanche withstand times (tAV) as
high as 71 �s are recorded. The variation of EAS and tAV with load
inductance (or avalanche current) is quantified. Stability of the key
DMOSFET performance characteristics including RDS,on, VTH, body-diode, gate/drain leakage currents and  terminal capacitances under both
single-pulse and repetitive (up to 1000 shots) avalanche conditions
are presented. Short-circuit withstand times (tSC) in the range of
3-14 �s are presented on the DMOSFETs, The impact of various factors
such as the device design, gate drive voltage, DC link (drain) voltage, and operating temperature on the tSC is quantified. The evolution of the I-V and C-V characteristics under short-circuit operation is examined, and failure mechanisms are suggested.
Bio- Dr. Ranbir Singh, received a Ph.D. and MS degrees in Electrical and Computer Engineering, North Carolina State University, Raleigh, NC, and B. Tech from Indian Institute of Technology, Delhi. He founded GeneSiC Semiconductor Inc. in 2004. Prior to that he conducted research on SiC power devices first at Cree Inc, and then at the NIST, Gaithersburg, MD. In 2012, EE Times named Dr. Singh as among "Forty Innovators building the foundations of next generation electronics industry.� In 2011, he won the R&D100 award towards his efforts in commercializing 6.5kV SiC Thyristors. He has published over 200 journal and conference papers, is an author on 28 issued US patents, and has authored a book.
A Review of Power Electronics based DERs and Interactions with the Grid Slides
Creators: Ehab Shoubaki
Publisher: name: IEEE
Year: 2019

PELS Webinar Slides
Abstract- Currently, the bulk of energy generated from fossil fuels, nuclear, geothermal, hydro and some wind resources interface with the grid through rotary machines. An ever increasing but small portion of generation comes from renewable energy resources distributed across the network that are harvested and dispatched into the grid by power electronics. It is well understood that increased penetration of renewable DERs introduces power quality and system wide stability issues. This webinar explores the effect of classically controlled DERs on grid stability and future directions for achieving autonomous grid forming capability with power electronics.
Current shot noise in atomic contacts: Fe and FeH$_2$ between Au electrodes
Creators: name: Mohr, Michael
name: Weismann, Alexander
name: Li, Dongzhe
name: Brandbyge, Mads
name: Berndt, Richard
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Single Fe atoms on Au(111) surfaces were hydrogenated and dehydrogenated with the Au tip of a low-temperature scanning tunneling microscope (STM). Fe and FeH$_2$ were contacted with the tip of the microscope and show distinctly different evolutions of the conductance with the tip-substrate distance. The current shot noise of these contacts has been measured and indicates a single relevant conductance channel with the spin-polarized transmission. For FeH$_2$ the spin polarization reaches values up to 80\% for low conductances and is reduced if the tip-surface distance is decreased. These observations are partially reproduced using density functional theory (DFT) based transport calculations. We suggest that the quantum motion of the hydrogen atoms, which is not taken into account in our DFT modeling, may have a significant effect on the results.
description: 10 pages
Nonlinear properties of split-ring resonators
Creators: name: Wang, Bingnan
name: Zhou, Jiangfeng
name: Koschny, Thomas
name: Soukoulis, Costas M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In this letter, the properties of split-ring resonators (SRRs) loaded with high-Q capacitors and nonlinear varactors are theoretically analyzed and experimentally measured. We demonstrate that the resonance frequency $f_m$ of the nonlinear SRRs can be tuned by increasing the incident power. $f_m$ moves to lower and higher frequencies for the SRR loaded with one varactor and two back-to-back varactors, respectively. For high incident powers, we observe bistable tunable metamaterials and hysteresis effects. Moreover, the coupling between two nonlinear SRRs is also discussed.
description: 6 pages, 5 figures
The Cascaded Resonant Converter A Hybrid Switched-Capacitor Topology with High Power Density and Efficiency-Slides
Creators: Zichao Ye
Publisher: name: IEEE
Year: 2019

PELS Webinar Slides
Abstract: This seminar will cover the topic of hybrid and resonant switched-capacitor (SC) power converters. This class of converters has received increased attention lately, owing to superior power density and efficiency compared to conventional approaches. Starting with an overview and analysis of conventional SC power converters, the concept of the fast and slow switching limits will be introduced, and the limitations and design constraints of SC converters will be highlighted. Second, the soft charging technique in SC converters through current source behavior and resonant operation will be examined, along with analytical techniques for modeling and comparing the performance of different SC topologies. Then, an example cascaded resonant converter with 99% peak efficiency and 2500 W/in3 power density for data center applications will be analyzed in detail. The key control techniques to achieve such high performance, including zero voltage switching and interleaving control will be presented. Finally, practical challenges such as gate driving and capacitor voltage balancing will be discussed, along with a number of proposed techniques to mitigate such difficulties.
Exploring the Scope of Using News Articles to Understand Development Patterns of Districts in India
Creators: name: Gupta, Mehak
name: Saifi, Shayan
name: Verma, Konark
name: Rekha, Kumari
name: Seth, Aaditeshwar
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Retrieval (cs.IR)
subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: Understanding what factors bring about socio-economic development may often suffer from the streetlight effect, of analyzing the effect of only those variables that have been measured and are therefore available for analysis. How do we check whether all worthwhile variables have been instrumented and considered when building an econometric development model? We attempt to address this question by building unsupervised learning methods to identify and rank news articles about diverse events occurring in different districts of India, that can provide insights about what may have transpired in the districts. This can help determine whether variables related to these events are indeed available or not to model the development of these districts. We also describe several other applications that emerge from this approach, such as to use news articles to understand why pairs of districts that may have had similar socio-economic indicators approximately ten years back ended up at different levels of development currently, and another application that generates a newsfeed of unusual news articles that do not conform to news articles about typical districts with a similar socio-economic profile. These applications outline the need for qualitative data to augment models based on quantitative data, and are meant to open up research on new ways to mine information from unstructured qualitative data to understand development.
description: 11 pages of main text, 4 pages of supplementary material
Studies of the muonium atom in liquid media
Creators: name: Ng, Chi Biu William
Publisher: name: University of British Columbia
Year: 2010

description: The μSR (muon spin rotation) and MSR (muonium spin rotation) techniques have been applied to study the reaction of muonium atoms in liquid media. Specifically, the temperature dependence of five types of reactions of muonium atoms in aqueous solution were measured between 1 and 92°C. Results indicated that for an electron-transfer reduction with MnO₄⁻, for an addition to π-bonds in maleic acid and for a spin-conversion reaction with Ni²⁺, the rate constants were all diffusion-limited. An activation energy for diffusion of 4.2 kcal.mole⁻¹ was found, while the A-factors varied somewhat in the range of -10¹³ M⁻¹s⁻¹. For these diffusion-controlled reactions there is no kinetic isotope effect when compared with H-atoms. On the other hand, a large kinetic isotope effect was found for the abstraction reaction of muonium with formate ion (HCO₂⁻) and this rate constant was activation-controlled. Also, the reaction with NO₃⁻ was studied and tends to exhibit a curved Arrhenius plot even over such a short temperature range. Such curvature is consistent with either a contribution from quantum mechanical tunnelling or alternative reaction paths. Other temperature-dependence studies of both the muon and muonium atoms in CS₂, H₂O, and CCℓ₄ are also reported. The muon relaxation rate constant in CS₂ was found to change somewhat from 1 to 40°C. In the case of H₂O, both the muon asymmetry and muonium relaxation rate constant were found to increase slightly from 1 to 92°C. However for CCℓ₄, there was no change found for the muon asymmetry in the temperature range of 2 to 58°C. In addition, the interactions of muonium with O₂ and with porphyrins in water were both studied using the MSR technique. In the case of O₂, the rate constant, which could be due to spin-conversion, was found to be (2.4±0.5)x10¹⁰ M⁻¹s⁻¹ and is compared with the diffusion-controlled limit and the corresponding gas phase reaction. For the reaction of muonium with porphyrins, the rate constants with hemin and the protoporphyrin were found to be 2.7x10⁹ and 6x10⁸ M⁻¹s⁻¹, respectively. The reaction mechanism is probably mainly through the addition to the conjugated double bond for the protoporphyrin and by reduction or partial spin-conversion for the hemin solutions. The theory behind the μSR and MSR techniques has been very briefly discussed but the experimental system for liquid phase studies at TRIUMF is described in some detail with respect to the transverse field technique.
Photovoltaic Optiverter-A Novel Hybrid MLPE Technology for Residential and Small Commercial Photovoltaic Applications-Slides
Creators: Andrii Chubb
Andre Lindvest
Publisher: name: IEEE
Year: 2020

PELS Webinar Slides
Abstract: We have assembled a group of experts in the field - leaders in Industry and Academia will present different perspectives of "Solar PV Microinverter" technology and discuss the state of the art.
SHTEYNER, PASKAL, BRIANSHON TEOREMALARI VA ULARNI MAKTAB BOSQICHIGA TADBIQI
Creators: name: Zahiriddinova, Shahlo
name: Yormatova, Farangiz
Publisher: name: Zenodo
Year: 2025

description: Ushbu maqola geometriyaning klassik Shteyner (Steiner), Paskal (Pascal) va Brianshon (Brianchon) teoremalarini o‘rganishga bag‘ishlangan bo‘lib, ularning maktab matematika ta’limiga murakkab, lekin samarali tarzda tadbiq qilish imkoniyatlarini keng ko‘lamda yoritadi. Bu teoremalar, o‘zining chuqur nazariy mazmuni va vizual-tahliyli xususiyatlari bilan, nafaqat oliy matematikaning poydevorini tashkil etadi, balki maktab o‘quvchilarining analitik fikrlash qobiliyatini rivojlantirishda ham muhim vosita sifatida xizmat qilishi mumkin. Maqolada ushbu teoremalarning tarixiy kelib chiqishi, geometrik mohiyati va zamonaviy ta’limdagi dolzarbligi sinchiklab tahlil qilinadi, shu bilan birga, ularni maktab dasturiga moslashtirish uchun innovatsion metodik yondashuvlar taklif etiladi.