cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Simultaneous estimation of segmented telescope phasing errors and non-common path aberrations from adaptive optics corrected images
Creators: name: Lamb, Masen
name: Correia, Carlos
name: Sivanandam, Suresh
name: Swanson, Robin
name: Zavyalova, Polina
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We investigate the focal plane wavefront sensing technique, known as Phase Diversity, at the scientific focal plane of a segmented mirror telescope with an adaptive optics (AO) system. We specifically consider an optical system imaging a point source in the context of (i) an artificial source within the telescope structure and (ii) from AO-corrected images of a bright star. From our simulations, we reliably disentangle segmented telescope phasing errors from non-common path aberrations (NCPA) for both a theoretical source and on-sky, AO-corrected images where we have simulated the Keck/NIRC2 system. This quantification from on-sky images is appealing, as it's sensitive to the cumulative wavefront perturbations of the entire optical train; disentanglement of phasing errors and NCPA is therefore critical, where any potential correction to the primary mirror from an estimate must contain minimal NCPA contributions. Our estimates require a one-minute sequence of short-exposure, AO-corrected images; by exploiting a slight modification to the AO-loop, we find that 75 defocused images produces reliable estimates. We demonstrate a correction from our estimates to the primary and deformable mirror results in a wavefront error reduction of up to 67% and 65% for phasing errors and NCPA, respectively. If the segment phasing errors on the Keck primary are on the order of ~130 nm RMS, we show we can improve the H-band Strehl ratio by up to 10% by using our algorithm. We conclude our technique works well to estimate NCPA alone from on-sky images, suggesting it is a promising method for any AO-system.
description: 14 pages, 17 figures, Accepted to MNRAS
Ester Prodrugs of Malonate with Enhanced Intracellular Delivery Protect Against Cardiac Ischemia-Reperfusion Injury In Vivo.
Creators: name: Prag, Hiran
name: Pala, Laura
name: Kula-Alwar, Duvaraka
name: Mulvey, John F
name: Luping, Du
name: Beach, Timothy E
name: Booty, Lee M
name: Hall, Andrew R
name: Logan, Angela
name: Sauchanka, Volha
name: Caldwell, Stuart T
name: Robb, Ellen L
name: James, Andrew
name: Xu, Zhelong
name: Saeb-Parsy, Kourosh
name: Hartley, Richard C
name: Murphy, Mike
name: Krieg, Thomas
Publisher: name: Apollo - University of Cambridge Repository
Year: 2020

description: PURPOSE: Mitochondrial reactive oxygen species (ROS) production upon reperfusion of ischemic tissue initiates the ischemia/reperfusion (I/R) injury associated with heart attack. During ischemia, succinate accumulates and its oxidation upon reperfusion by succinate dehydrogenase (SDH) drives ROS production. Inhibition of succinate accumulation and/or oxidation by dimethyl malonate (DMM), a cell permeable prodrug of the SDH inhibitor malonate, can decrease I/R injury. However, DMM is hydrolysed slowly, requiring administration to the heart prior to ischemia, precluding its administration to patients at the point of reperfusion, for example at the same time as unblocking a coronary artery following a heart attack. To accelerate malonate delivery, here we developed more rapidly hydrolysable malonate esters. METHODS: We synthesised a series of malonate esters and assessed their uptake and hydrolysis by isolated mitochondria, C2C12 cells and in mice in vivo. In addition, we assessed protection against cardiac I/R injury by the esters using an in vivo mouse model of acute myocardial infarction. RESULTS: We found that the diacetoxymethyl malonate diester (MAM) most rapidly delivered large amounts of malonate to cells in vivo. Furthermore, MAM could inhibit mitochondrial ROS production from succinate oxidation and was protective against I/R injury in vivo when added at reperfusion. CONCLUSIONS: The rapidly hydrolysed malonate prodrug MAM can protect against cardiac I/R injury in a clinically relevant mouse model.
SYM N=4 in light-cone gauge and the "bridge" identities
Creators: name: Bassetto, A.
name: De Pol, G.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The light-cone gauge allows to single out a set of ``transverse'' fields (TF), whose Green functions are free from UV divergences in SYM N=4. Green functions with external lines involving the remaining fields do instead exhibit divergences: indeed those fields can be expressed, by solving their equations of motion, as composite operators in terms of ``transverse'' fields. A set of exact identities (bridge identities) automatically realize their insertions in a path-integral formulation.
description: 12 pages, LaTeX, uses cernrep, axodraw, cancel; figures included; minor improvements, references added, version accepted for publication in Phys. Rev. D
Phonon anharmonicities in graphite and graphene
Creators: name: Bonini, Nicola
name: Lazzeri, Michele
name: Marzari, Nicola
name: Mauri, Francesco
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We determine from first-principles the finite-temperature properties--linewidths, line shifts, and lifetimes--of the key vibrational modes that dominate inelastic losses in graphitic materials. In graphite, the phonon linewidth of the Raman-active E2g mode is found to decrease with temperature; such anomalous behavior is driven entirely by electron-phonon interactions, and does not appear in the nearly-degenerate infrared-active E1u mode. In graphene, the phonon anharmonic lifetimes and decay channels of the A'1 mode at K dominate over E2g at G and couple strongly with acoustic phonons, highlighting how ballistic transport in carbon-based interconnects requires careful engineering of phonon decays and thermalization.
description: 5 pages, 4 figures; typos corrected and reference added
Sulfur-induced magnetism in FeSe$_{1-x}$S$_x$ thin films on LaAlO$_3$ revealed by muon spin rotation/relaxation
Creators: name: Nabeshima, F.
name: Kawai, Y.
name: Shikama, N.
name: Sakishita, Y.
name: Suter, A.
name: Prokscha, T.
name: Park, S. E.
name: Komiya, S.
name: Ichinose, A.
name: Adachi, T.
name: Maeda, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Muon spin rotation/relaxation measurements were performed to investigate magnetic properties of FeSe$_{1-x}$S$_x$ thin films on LaAlO$_3$. A drastic decrease of the initial asymmetry was observed together with the peak structure in the temperature dependence of the relaxation rate of muon spins almost at the same temperature where kink anomalies were observed in the temperature dependent resistivity. With increasing S content, the anomaly temperature increased and the magnetic fluctuations at the lowest temperature were suppressed. These results show that the S substitution induces magnetism at low temperatures in FeSe$_{1-x}$S$_x$ thin films. Although the behaviors of the magnetic and nematic phases in FeSe films towards chemical pressure by S substitution are similar to those for bulk FeSe towards hydrostatic pressure, the behavior of $T_{\mathrm c}$ is significantly different between these systems. Our results demonstrate that the detailed comparative investigation among physical and chemical pressure effects is essentially important to understand the interplay of the magnetism, the nematicity and the superconductivity in iron chalcogenides.
description: 19 pages, 5 figures
PERCEVAL: a Computer-Driven System for Experimentation on Auditory and Visual Perception
Creators: name: André, Carine
name: Ghio, Alain
name: Cavé, Christian
name: Teston, Bernard
Publisher: name: arXiv
Year: 2007
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Since perception tests are highly time-consuming, there is a need to automate as many operations as possible, such as stimulus generation, procedure control, perception testing, and data analysis. The computer-driven system we are presenting here meets these objectives. To achieve large flexibility, the tests are controlled by scripts. The system's core software resembles that of a lexical-syntactic analyzer, which reads and interprets script files sent to it. The execution sequence (trial) is modified in accordance with the commands and data received. This type of operation provides a great deal of flexibility and supports a wide variety of tests such as auditory-lexical decision making, phoneme monitoring, gating, phonetic categorization, word identification, voice quality, etc. To achieve good performance, we were careful about timing accuracy, which is the greatest problem in computerized perception tests.
Slides for: Advances on Multimodal Machine Learning Solutions for Speech Processing Tasks and Emotion Recognition
Creators: Dr. Fei Tao
Dr. Carlos Busso
Publisher: name: IEEE
Year: 2023

Slides for: SPS Webinar, January 19, 2023, Dr. Fei Tao and Dr. Carlos Busso
Recent advances in multimodal processing have led to promising solutions for speech-processing tasks. One example is automatic speech recognition (ASR), which is a key component in current speech-based systems. Since the surrounding acoustic noise can severely degrade the performance of an ASR system, an appealing solution is to augment conventional audio-based ASR systems with visual features describing lip activity. We describe a novel end-to-end, multitask learning (MTL), audiovisual ASR (AV-ASR) system. A key novelty of the approach is the use of MTL, where the primary task is AV-ASR, and the secondary task is audiovisual voice activity detection (AV-VAD). We obtain a robust and accurate audiovisual system that generalizes across conditions. By detecting segments with speech activity, the AV-ASR performance improves as its connectionist temporal classification (CTC) loss function can leverage from the AV-VAD alignment information. Furthermore, the end-to-end system learns from the raw audiovisual inputs a discriminative high-level representation for both speech tasks, providing the flexibility to mine information directly from the data. The proposed architecture considers the temporal dynamics within and across modalities, providing an appealing and practical fusion scheme. In addition to state-of-the-art performance in AV-ASR, the proposed solution can also provide valuable information about speech activity, solving two of the most important tasks in speech-based applications. This webinar will also discuss advances of multimodal solutions for emotion recognition. We describe multimodal pre-text tasks that are carefully designed to learn better representations for predicting emotional cues from speech, leveraging the relationship between acoustic and facial features. We also discuss our current effort to design multimodal emotion recognition strategies that effectively combine auxiliary networks, a transformer architecture, and an optimized training mechanism for aligning modalities, capturing temporal information, and handling missing features.  These models offer principled solutions to increase the generalization and robustness of emotion recognition systems.
Additional file 3 of GBC: a parallel toolkit based on highly addressable byte-encoding blocks for extremely large-scale genotypes of species
Creators: name: Zhang, Liubin
name: Yuan, Yangyang
name: Peng, Wenjie
name: Tang, Bin
name: Li, Mulin Jun
name: Gui, Hongsheng
name: Wang, Qiang
name: Li, Miaoxin
Publisher: name: figshare
Year: 2023
Subjects: subject: Artificial Intelligence and Image Processing
subject: FOS: Computer and information sciences

description: Additional file 3: Note 1. A detailed description of GTB file. Note 2. The generation method of simulation genotypes. Note 3. The format of the contig file. Note 4. Examined programs.
Comparative Analysis of the Model for Exoplanet Atmosphere Outflow
Creators: name: Isakova, P. B.
name: Pavlyuchenkov, Ya. N.
name: Kalinicheva, E. S.
name: Shematovich, V. I.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Modeling the outflow of planetary atmospheres is important for understanding the evolution of exoplanet systems and for interpreting their observations. Modern theoretical models of exoplanet atmospheres become increasingly detailed and multicomponent, and this makes difficulties for engaging new researchers in the scope. Here, for the first time, we present the results of testing the gas-dynamic method incorporated in our aeronomic model, which has been proposed earlier. Undertaken tests support the correctness of the method and validate its applicability. For modeling the planetary wind, we propose a new hydrodynamic model equipped with a phenomenological function of heating by stellar UV radiation. The general flow in this model well agrees with results obtained in more detailed aeronomic models. The proposed model can be used for both methodical purposes and testing the gas-dynamic modules of self-consistent chemical-dynamic models of the planetary wind.
description: 8 pages, 6 figures, accepted for publication in Astronomy Reports (2021)
Slides for: On Hydrogen and the Power Industry
Creators: Benoit Marcoux
Publisher: name: IEEE
Year: 2023

Slides for: On Hydrogen and the Power Industry
Hydrogen is variously seen as a key decarbonization opportunity or a big decarbonization problem, either way with major impacts on the energy system. This webinar is an attempt to understand the hydrogen ecosystem and how it might impact the energy system.

- Production of low-carbon hydrogen will be essential to replace the ?60 millions of tons of fossil hydrogen used annually as feedstock for various chemical processes, such as making fertilizer. Other uses of hydrogen as a feedstock may arise to reduce the carbon intensity of other industrial processes. Production of low-carbon hydrogen by electrolysis from renewable electricity will have a significant impact on the electrical grid.

- Molecular hydrogen could be used as a renewable energy carrier, but it is a lousy one, with only 1/4 to 1/3 of the energy used in the process recovered when the hydrogen is fed to a fuel cell or simply burned for heat. Molecular hydrogen is also difficult to transport and to store, and most of the molecular hydrogen made today is used where it is being made, or nearby.
Slides for: Enhancing Low-light Images without Paired Supervision
Creators: Yifan Jiang
Publisher: name: IEEE
Year: 2023

Slides for: SPS Webinar, 18 January 2023, Yifan Jiang
Deep learning-based methods have achieved remarkable success in image restoration and enhancement, but are they still competitive when there is a lack of paired training data? As one such example, this work explores the low-light image enhancement problem, where in practice it is extremely challenging to simultaneously take a low-light and a normal-light photo of the same visual scene. We propose a highly effective unsupervised generative adversarial network, dubbed EnlightenGAN, that can be trained without low/normal-light image pairs, yet proves to generalize very well on various real-world test images. Instead of supervising the learning using ground truth data, we propose to regularize the unpaired training using the information extracted from the input itself and benchmark a series of innovations for the low-light image enhancement problem, including a global-local discriminator structure, a self-regularized perceptual loss fusion, and attention mechanism. Through extensive experiments, our proposed approach outperforms recent methods under a variety of metrics in terms of visual quality and subjective user study. Thanks to the great flexibility brought by unpaired training, EnlightenGAN is demonstrated to be easily adaptable to enhancing real-world images from various domains.
STDP and the distribution of preferred phases in the whisker system
Creators: name: Sherf, Nimrod
name: Shamir, Maoz
Publisher: name: arXiv
Year: 2021
Subjects: subject: Neurons and Cognition (q-bio.NC)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Rats and mice use their whiskers to probe the environment. By rhythmically swiping their whiskers back and forth they can detect the existence of an object, locate it, and identify its texture. Localization can be accomplished by inferring the position of the whisker. Rhythmic neurons that track the phase of the whisking cycle encode information about the azimuthal location of the whisker. These neurons are characterized by preferred phases of firing that are narrowly distributed. Consequently, pooling the rhythmic signal from several upstream neurons is expected to result in a much narrower distribution of preferred phases in the downstream population, which however has not been observed empirically. Here, we show how spike-timing-dependent plasticity (STDP) can provide a solution to this conundrum. We investigated the effect of STDP on the utility of a neural population to transmit rhythmic information downstream using the framework of a modeling study. We found that under a wide range of parameters, STDP facilitated the transfer of rhythmic information despite the fact that all the synaptic weights remained dynamic. As a result, the preferred phase of the downstream neuron was not fixed, but rather drifted in time at a drift velocity that depended on the preferred phase, thus inducing a distribution of preferred phases. We further analyzed how the STDP rule governs the distribution of preferred phases in the downstream population. This link between the STDP rule and the distribution of preferred phases constitutes a natural test for our theory.
description: 19 pages, 11 figures
title: Aristophanes and Euripides : a palimpsestuous relationship
Creators: name: May, Gina
Publisher: name: University of Kent
Year: 2021

description: Aristophanes allows Euripides to interrupt constantly. In Athenian comedy of the fifth century they are on stage together, both literally and figuratively. Despite Aristophanes’ comedies having a meaning of their own, Euripides’ lines are so clearly visible underneath them that they can only be described as the verbal equivalent of a palimpsest. The Oxford English Dictionary defines a palimpsest as a manuscript or piece of writing on which later writing has superimposed or effaced earlier writing, or something reused or altered but still bearing visible traces of its earlier form. It is clear that a palimpsest is the product of layering that results in something as new, whilst still bearing traces of the original. Dillon describes the palimpsest as " ... an involuted phenomenon where otherwise unrelated texts are involved and entangled, intricately interwoven, interrupting and inhabiting each other". Aristophanes takes texts, particularly those of Euripides, which may otherwise have been unrelated, and weaves them together to form something new. I will show that in a number of cases Aristophanes offers scenes that have already been performed in Euripides’ plays but lays his own plot over the tragedian’s, whilst at the same time drawing the audiences’ attention to the original. The nature of this borrowing overwrites Kristeva’s theory of ‘intertextuality’ and provides a new and more apposite name for the permutation of texts in which the geno-text corresponds to infinite possibilities of palimpsestuous textuality (and the pheno-text to a singular text, which contains echoes of what it could have been). The plurality of Euripides’ texts, whilst engendering those of Aristophanes, constantly interrupts them. Through the consideration of ancient and modern literary theory and by a close analysis of Aristophanes’ and Euripides’ plays, this thesis sets out to offer a new reading of the relationship between these two poets. It shows that they were engaged in a dialogue of reciprocal influence that came to a head at the end of the Peloponnesian War.
World Sheet Commuting βγCFT and Non-Relativistic String Theories
Creators: name: Kim, Bom Soo
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We construct a sigma model in two dimensions with Galilean symmetry in flat target space similar to the sigma model of the critical string theory with Lorentz symmetry in 10 flat spacetime dimensions. This is motivated by the works of Gomis and Ooguri\cite{Gomis:2000bd} and Danielsson et. al. \cite{Danielsson:2000gi, Danielsson:2000mu}. Our theory is much simpler than their theory and does not assume a compact coordinate. This non-relativistic string theory has a bosonic matter $βγ$ CFT with the conformal weight of $β$ as 1. It is natural to identify time as a linear combination of $γ$ and $\barγ$ through an explicit realization of the Galilean boost symmetry. The angle between $γ$ and $\barγ$ parametrizes one parameter family of selection sectors. These selection sectors are responsible for having a non-relativistic dispersion relation without a nontrivial topology in the non-relativistic setup, which is one of the major differences from the previous works\cite{Gomis:2000bd, Danielsson:2000gi, Danielsson:2000mu}. This simple theory is the non-relativistic analogue of the critical string theory, and there are many different avenues ahead to be investigated. We mention a possible consistent generalization of this theory with different conformal weights for the $βγ$ CFT. We also mention supersymmetric generalizations of these theories.
description: 26 pages
Physical Aspects of Cancer Invasion
Creators: name: Guiot, Caterina
name: Pugno, Nicola
name: Delsanto, Pier Paolo
name: Deisboeck, Thomas S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: Invasiveness, one of the hallmarks of tumor progression, represents the tumor's ability to expand into the host tissue by means of several complex biochemical and biomechanical processes. Since certain aspects of the problem present a striking resemblance with well known physical mechanisms, such as the mechanical insertion of a solid inclusion in an elastic material specimen [1, 2] or a water drop impinging on a surface [3], we propose here an analogy between these physical processes and a cancer system's invasive branching into the surrounding tissue. Accounting for its solid and viscous properties, we present a unifying concept that the tumor behaves as a granular solid. While our model has been explicitly formulated for multicellular tumor spheroids in vitro, it should also contribute to a better understanding of tumor invasion in vivo.
description: 20 pages, 2 figures
The spectral sequence of an equivariant chain complex and homology with local coefficients
Creators: name: Papadima, Stefan
name: Suciu, Alexander I.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Algebraic Topology (math.AT)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 55N25, 55T99, 20J05, 57M05

description: We study the spectral sequence associated to the filtration by powers of the augmentation ideal on the (twisted) equivariant chain complex of the universal cover of a connected CW-complex X. In the process, we identify the d^1 differential in terms of the coalgebra structure of H_*(X,\k), and the \kπ_1(X)-module structure on the twisting coefficients. In particular, this recovers in dual form a result of Reznikov, on the mod p cohomology of cyclic p-covers of aspherical complexes. This approach provides information on the homology of all Galois covers of X. It also yields computable upper bounds on the ranks of the cohomology groups of X, with coefficients in a prime-power order, rank one local system. When X admits a minimal cell decomposition, we relate the linearization of the equivariant cochain complex of the universal abelian cover to the Aomoto complex, arising from the cup-product structure of H^*(X,\k), thereby generalizing a result of Cohen and Orlik.
description: 38 pages, 1 figure (section 10 of version 1 has been significantly expanded into a separate paper, available at arXiv:0901.0105); accepted for publication in the Transactions of the American Mathematical Society
Revised IEEE 1547 Standard for Interconnecting Distributed Energy Resources with Electric Power Systems (Slides)
Creators: Babak Enayati
Mark Siira
Publisher: name: IEEE
Year: 2018

This tutorial presenation will cover the following:
- Introduction -  a high level overview of IEEE 1547, i.e. drivers, scope, applicability, and ongoing activities
- VAR Capability and Voltage Regulation -  voltage regulation grid support functionality that can be provided by DER.
- Power Quality - the Power Quality impact-limitations, that have been expanded in 1547-2018
- Voltage and Frequency Ride Through capability, and other requirements related to abnormal grid conditions, and DER
- Islanding and Energy Storage DER
- Interoperability information exchange between the DER and the Area Electric Power System (EPS)
- Testing Requirements, the required tests that DER have to pass in order to be considered IEEE 1547 compliant
-  IEEE P1547.1 DER Interconnection Test Procedures set by IEEE 1547.
This tutorial presenation will cover the following:
- Introduction -  a high level overview of IEEE 1547, i.e. drivers, scope, applicability, and ongoing activities
- VAR Capability and Voltage Regulation -  voltage regulation grid support functionality that can be provided by DER.
- Power Quality - the Power Quality impact-limitations, that have been expanded in 1547-2018
- Voltage and Frequency Ride Through capability, and other requirements related to abnormal grid conditions, and DER
- Islanding and Energy Storage DER
- Interoperability information exchange between the DER and the Area Electric Power System (EPS)
- Testing Requirements, the required tests that DER have to pass in order to be considered IEEE 1547 compliant
-  IEEE P1547.1 DER Interconnection Test Procedures set by IEEE 1547.
Stretched exponential relaxation and ac universality in disordered dielectrics
Creators: name: Milovanov, Alexander V.
name: Rasmussen, Jens Juul
name: Rypdal, Kristoffer
Publisher: name: arXiv
Year: 2007
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: This paper is concerned with the connection between the properties of dielectric relaxation and ac (alternating-current) conduction in disordered dielectrics. The discussion is divided between the classical linear-response theory and a self-consistent dynamical modeling. The key issues are, stretched exponential character of dielectric relaxation, power-law power spectral density, and anomalous dependence of ac conduction coefficient on frequency. We propose a self-consistent model of dielectric relaxation, in which the relaxations are described by a stretched exponential decay function. Mathematically, our study refers to the expanding area of fractional calculus and we propose a systematic derivation of the fractional relaxation and fractional diffusion equations from the property of ac universality.
description: 8 pages, 2 figures
Optical phonon modes, static and high frequency dielectric constants, and effective electron mass parameter in cubic In$_2$O$_3$
Creators: name: Stokey, Megan
name: Korlacki, Rafal
name: Knight, Sean
name: Ruder, Alexander
name: Hilfiker, Matthew
name: Galazka, Zbigniew
name: Irmscher, Klaus
name: Zhang, Yuxuan
name: Zhao, Hongping
name: Darakchieva, Vanya
name: Schubert, Mathias
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A complete set of all optical phonon modes predicted by symmetry for bixbyite structure indium oxide is reported here from a combination of far-infrared and infrared spectroscopic ellipsometry, as well as first principle calculations. Dielectric function spectra measured on high quality, marginally electrically conductive melt grown single bulk crystals are obtained on a wavelength-by-wavelength (a.k.a. point-by-point) basis and by numerical reduction of a subtle free charge carrier Drude model contribution. A four-parameter semi-quantum model is applied to determine all sixteen pairs of infrared-active transverse and longitudinal optical phonon modes, including the high-frequency dielectric constant, $\varepsilon_{\infty}=4.05\pm 0.05$. The Lyddane-Sachs-Teller relation then gives access to the static dielectric constant, $\varepsilon_{\mathrm{DC}}=10.55\pm 0.07$. All experimental results are in excellent agreement with our density functional theory calculations and with previously reported values, where existent. We also perform optical Hall effect measurements and determine for the unintentionally doped $n$-type sample a free electron density of $n=(2.81 \pm 0.01)\times 10^{17}$~cm$^{-3}$, mobility of $μ=(112 \pm 3)$~cm$^{2}$/(Vs), and an effective mass parameter of $(0.208\pm0.006)m_e$. Density and mobility parameters compare very well with results of electrical Hall effect measurements. Our effective mass parameter, which is measured independently of any other experimental technique, represents the bottom curvature of the $Γ$ point in In$_2$O$_3$ in agreement with previous extrapolations. We use terahertz spectroscopic ellipsometry to measure the quasi-static response of In$_2$O$_3$, and our model validates the static dielectric constant obtained from the Lyddane-Sachs-Teller relation.
Screening of Coulomb Impurities in Graphene
Creators: name: Terekhov, Ivan S.
name: Milstein, Alexander I.
name: Kotov, Valeri N.
name: Sushkov, Oleg P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We calculate exactly the vacuum polarization charge density in the field of a subcritical Coulomb impurity, $Z|e|/r$, in graphene. Our analysis is based on the exact electron Green's function, obtained by using the operator method, and leads to results that are exact in the parameter $Zα$, where $α$ is the "fine structure constant" of graphene. Taking into account also electron-electron interactions in the Hartree approximation, we solve the problem self-consistently in the subcritical regime, where the impurity has an effective charge $Z_{eff}$, determined by the localized induced charge. We find that an impurity with bare charge Z=1 remains subcritical, $Z_{eff} α< 1/2$, for any $α$, while impurities with $Z=2,3$ and higher can become supercritical at certain values of $α$.
description: 4 pages, 2 figures
title: The place where curses are manufactured : four poets of the Vietnam War
Creators: name: Miller, Katherine R
Publisher: name: University of Kent
Year: 1990

description: The Vietnam War was unique among American wars. To pinpoint its uniqueness, it was necessary to look for a non-American voice that would enable me to articulate its distinctiveness and explore the American character as observed by an Asian. Takeshi Kaiko proved to be most helpful. From his novel, Into a Black Sun, I was able to establish a working pair of 'bookends' from which to approach the poetry of Walter McDonald, Bruce Weigl, Basil T. Paquet and Steve Mason. Chapter One is devoted to those seemingly mismatched 'bookends,' Walt Whitman and General William C. Westmoreland, and their respective anthropocentric and technocentric visions of progress and the peculiarly American concept of the "open road" as they manifest themselves in Vietnam. In Chapter, Two, I analyze the war poems of Walter McDonald. As a pilot, writing primarily about flying, his poetry manifests General Westmoreland's technocentric vision of the 'road' as determined by and manifest through technology. Chapter Three focuses on the poems of Bruce Weigl. The poems analyzed portray the literal and metaphorical descent from the technocentric, 'numbed' distance of aerial warfare to the world of ground warfare, and the initiation of a 'fucking new guy,' who discovers the contours of the self's interior through a set of experiences that lead from from aerial insertion into the jungle to the degradation of burning human feces. Chapter Four, devoted to the thirteen poems of Basil T. Paquet, focuses on the continuation of the descent begun in Chapter Two. In his capacity as a medic, Paquet's entire body of poems details his quotidian tasks which entail tending the maimed, the mortally wounded and the dead. The final chapter deals with Steve Mason's JohnnY's Song, and his depiction of the plight of Vietnam veterans back in "The World" who are still trapped inside the interior landscape of their individual "ghettoes" of the soul created by their war-time experiences.
$\mathcal{PT}$-symmetry breaking in a Kitaev chain with one pair of gain-loss potentials
Creators: name: Agarwal, Kaustubh S.
name: Joglekar, Yogesh N.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Parity-time ($\mathcal{PT}$) symmetric systems are classical, gain-loss systems whose dynamics are governed by non-Hermitian Hamiltonians with exceptional-point (EP) degeneracies. The eigenvalues of a $\mathcal{PT}$-symmetric Hamiltonian change from real to complex conjugates at a critical value of gain-loss strength that is called the $\mathcal{PT}$ breaking threshold. Here, we obtain the $\mathcal{PT}$-threshold for a one-dimensional, finite Kitaev chain -- a prototype for a p-wave superconductor -- in the presence of a single pair of gain and loss potentials as a function of the superconducting order parameter, on-site potential, and the distance between the gain and loss sites. In addition to a robust, non-local threshold, we find a rich phase diagram for the threshold that can be qualitatively understood in terms of the band-structure of the Hermitian Kitaev mo del. In particular, for an even chain with zero on-site potential, we find a re-entrant $\mathcal{PT}$-symmetric phase bounded by second-order EP contours. Our numerical results are supplemented by analytical calculations for small system sizes.
description: 8 pages, 6 figures
IEEE 1547: Standard for Interconnection and Interoperability of Distributed Energy Resources with Associated Electric Power Systems Interfaces
Creators: Babak Enayati
Publisher: name: IEEE
Year: 2016

In this presentation, we'll review
- What is IEEE 1547?
- Ride through
- Voltage regulation
- Power Quality
- Overview of interoperability, island systems, and testing
Scope: This standard establishes criteria and requirements for interconnection of distributed energy resources (DER) with electric power systems (EPS), and associated interfaces.
Purpose: This document provides a uniform standard for the interconnection and interoperability of distributed energy resources (DER) with electric power systems (EPS). It provides requirements relevant to the interconnection and interoperability performance, operation, and testing, and,   safety, maintenance and security considerations.
Regularity of a inverse problem for generic parabolic equations
Creators: name: Dokuchaev, Nikolai
Publisher: name: arXiv
Year: 2007
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 35K20, 35Q99, 32A35, 47A52

description: The paper studies some inverse boundary value problem for simplest parabolic equations such that the homogenuous Cauchy condition is ill posed at initial time. Some regularity of the solution is established for a wide class of boundary value inputs.
description: 9 pages
The effects of superovulation with pregnant mare serum gonadotrophin in uteri, vaginae and serum steroid levels of immature rats
Creators: name: Fang, Paul Maximilian
Publisher: name: University of British Columbia
Year: 2010

description: Superovulatory treatment with exogenous gonadotrophins adversely affects the uterus through the disruption of the delicate balance of ovarian steroid (estrogens, progestins, androgens) secretion rates. To examine the uterine effects of this treatment, 189 animals were given 4, 20 or 40 IU pregnant mare serum gonadotrophin (PMSG) at 28 days of age and sacrificed every 24 h until day 10 (D10) post injection. To study the long term uterine effects, 12 rats were treated with 4 or 40 IU PMSG and killed on D30. The morphological and histological changes of control (4 IU) uteri mimicked those of the adult on a comparable time course from D2 to D5. Administration of superovulatory doses (2 0, 4 0 IU) of PMSG produced stromal hypertrophy by D2 and focal papillary hyperplasia of the luminal epithelia by D3. It is suggested that previous exposure to high levels of estrogen and androgens, secondary to superovulation, are possible causes for this pathology. Levels of 17B-estradiol following 2 0 and 40 IU PMSG treatment were significantly (p<0.005, p<0.05) elevated above those of controls from DI to early D3 and at D2, respectively. Androgen levels of both groups (20 IU, 40 IU) significantly (p<0.05, p<0.005) increased from baseline at DI to maxima by D2 and D3, respectively. In the 20 IU PMSG group, the hyperplasia gradually regressed after D3 and was absent by D10. The hyperplasia in the 40 IU PMSG group, however, had diffused by D6. It is suspected that preceding elevated levels of estrogen may be responsible for this progressive change. At D4, levels of 17B-estradiol reached a maximum, which was significantly (p<0.001) greater than those of controls and 20 IU PMSG treated rats. Between D6 and D10, the hyperplasia partially regressed. Examination of uteri from D30 revealed no evidence of pathology. In addition to these structural effects, superovulation induced secretion of a mucinous substance in both 20 IU and 40 IU PMSG groups at D5-D6 and D6-D7, respectively. These results suggest that abnormal changes in the uterine histology and metabolism may result following administration of superovulatory doses of PMSG. Although these dose-dependent alterations appear reversible, they may interfere with preparations associated with implantation and thus require further investigation.
Formation of Quark Phases in compact stars and their connection to Gamma-Ray-Bursts
Creators: name: Drago, A.
name: Pagliara, G.
name: Schaffner-Bielich, J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We analyse the occurrence of quiescent times in the temporal structure of the Gamma-Ray-Bursts (GRBs) light curves. We show that if a long quiescent time is present, it is possible to divide the total duration of GRBs into three periods: the pre-quiescence emission, the quiescent time and the post-quiescence emission. We then discuss a model of the GRBs inner engine based on the formation of quark phases during the life of an hadronic star. Within this model the pre-quiescence emission is interpreted as due to the deconfinement of quark inside an hadronic star and the formation of 2SC quark matter. The post-quiescence emission is due to the conversion of 2SC into the Color-Flavor-Locking (CFL) phase. The temporal delay between these two processes is connected with the nucleation time of the CFL phase in the 2SC phase and it can be associated with the observed quiescent times in the GRBs light curves. The stability of CFL cores in compact stars is also discussed.
description: 6 pages, 3 figures, to appear in the proceedings of 3th International Conference on Nuclear Physics in Astrophysics (NPAIII), 26 - 31 March 2007 Dresden, Germany
Power & Energy Magazine - Volume 21: Issue 1 - January/February 2023 : Improved Grid Visability
Creators: Bei Gou
Tianshu B
Shaobu Wang
Innocent Kamwa
Sakis Meliopoulos
José A. Rosendo-Macías
Publisher: name: IEEE
Year: 2023

Dynamic State and Parameter Estimation Developments
Dynamic State and Parameter Estimation Developments
title: The anatomy of aesthetic experience
Creators: name: Ursell, James
Publisher: name: University of St Andrews
Year: 2020

description: The primary aim of this thesis is to formulate an intensional definition of aesthetic experience. Its secondary aims are (i) to show how this definition might be used for empirical research and (ii) to better understand other terms that are qualified by ‘aesthetic’ (chiefly, ‘aesthetic properties’ and ‘aesthetic value’). In chapter one, I will explain the nature of the problem we face and why it demands our attention. In chapters two and three, I will critically survey positions in the literature and argue that none adequately characterise aesthetic experience. In chapter four, I will motivate and defend an intensional definition of ‘aesthetic experience’ and an art-based account of ‘aesthetic properties’. The former states, put briefly, that aesthetic experiences are those which acquire a valence when the subject attends to the content of her experience for its own sake and discerns aesthetic properties. The latter states that ‘aesthetic properties’ are those which comprise the value artworks have as works of art. In chapter five, I will use this definition of aesthetic experience to formulate the hypothesis that mindfulness training can augment one’s propensity for having rewarding aesthetic experiences of nature and everyday life. I will then propose how this hypothesis could be empirically investigated. In chapter six, I conclude by examining what my analysis of ‘aesthetic experience’ and ‘aesthetic properties’ reveals about ‘aesthetic value’. I will then, finally, highlight topics requiring further research.
A holistic approach for cross-platform software development
Creators: name: Blanco, Juliano Zanuzzio
name: Lucrédio, Daniel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Cross-platform development solutions can help to make software available on different devices and platforms. But these are normally restricted to preconfigured platforms and consider that each individual solution is equal or similar to each other. As a result, developers have to resort to native development and build individual solutions, one for each device/platform, that cooperate to deliver the desired global functionality. This article presents an approach that takes advantage of existing solutions and have support for extending and including new platforms, and distributing functionality across devices. The approach is based on a general-purpose language that raises the abstraction level in order to keep the software free from platform details. Automatic transformations produce executable code that can be properly divided and deployed separately into different platforms. The proposed approach was evaluated in four ways. In the first evaluation, an existing cross-platform system was recreated using the approach. The second and third evaluations was conducted with expert and novice developers, who tested the approach in practice. The fourth evaluation introduced support for cross-platform testing. Results have brought evidence supporting the following main contributions: use of a single environment, the ability to reuse similar concepts between platforms and the potential to reduce costs.
description: 18 pages, 6 figures, Journal of Systems and Software
Measurement of electro-magnetic radiation at RHIC-PHENIX
Creators: name: Sakaguchi, Takao
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Recent results on direct photons and dileptons from the PHENIX experiment opened up a possibility of landscaping electro-magnetic radiation over various kinetic energies in heavy ion collisions. Results on direct photon measurement in Au+Au collisions at $\sqrt{s_{NN}}$=200GeV are discussed from the point of view of structure function and isospin effect. It is supported by the first measurement of direct photons at $\sqrt{s_{NN}}$=62.4GeV in the same collisional system.
description: Revised along with comments received. 6 pages, 6 figures, Awarded best poster presented at International Nuclear Physics Conference 2007, June 7, 2007, held in Tokyo, Japan
Predictive Model of Inverted Neutrino Mass Hierarchy and Resonant Leptogenesis
Creators: name: Babu, K. S.
name: Bachri, Abdel G.
name: Tavartkiladze, Zurab
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a new realization of inverted neutrino mass hierarchy based on $S_3 \times {\cal U}(1)$ flavor symmetry. In this scenario, the deviation of the solar oscillation angle from $π/4$ is correlated with the value of $θ_{13}$, as they are both induced by a common mixing angle in the charged lepton sector. We find several interesting predictions: $\te_{13}\geq 0.13$, $\sin^2\te_{12}\geq 0.31$, $\sin^2\te_{23}\simeq 0.5$ and $0\leq \cos \de \leq 0.7$ for the neutrino oscillation parameters and $0.01 {\rm eV}\stackrel{
description: Model slightly improved, references added, version will appear in IJMP
Corn Yield Prediction with Ensemble CNN-DNN
Creators: name: Shahhosseini, Mohsen
name: Hu, Guiping
name: Khaki, Saeed
name: Archontoulis, Sotirios V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantitative Methods (q-bio.QM)
subject: Machine Learning (cs.LG)
subject: FOS: Biological sciences
subject: FOS: Computer and information sciences

description: We investigate the predictive performance of two novel CNN-DNN machine learning ensemble models in predicting county-level corn yields across the US Corn Belt (12 states). The developed data set is a combination of management, environment, and historical corn yields from 1980-2019. Two scenarios for ensemble creation are considered: homogenous and heterogeneous ensembles. In homogenous ensembles, the base CNN-DNN models are all the same, but they are generated with a bagging procedure to ensure they exhibit a certain level of diversity. Heterogenous ensembles are created from different base CNN-DNN models which share the same architecture but have different levels of depth. Three types of ensemble creation methods were used to create several ensembles for either of the scenarios: Basic Ensemble Method (BEM), Generalized Ensemble Method (GEM), and stacked generalized ensembles. Results indicated that both designed ensemble types (heterogenous and homogenous) outperform the ensembles created from five individual ML models (linear regression, LASSO, random forest, XGBoost, and LightGBM). Furthermore, by introducing improvements over the heterogeneous ensembles, the homogenous ensembles provide the most accurate yield predictions across US Corn Belt states. This model could make 2019 yield predictions with a root mean square error of 866 kg/ha, equivalent to 8.5% relative root mean square, and could successfully explain about 77% of the spatio-temporal variation in the corn grain yields. The significant predictive power of this model can be leveraged for designing a reliable tool for corn yield prediction which will, in turn, assist agronomic decision-makers.
Absorbing boundary conditions for Einstein's field equations
Creators: name: Sarbach, Olivier
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A common approach for the numerical simulation of wave propagation on a spatially unbounded domain is to truncate the domain via an artificial boundary, thus forming a finite computational domain with an outer boundary. Absorbing boundary conditions must then be specified at the boundary such that the resulting initial-boundary value problem is well posed and such that the amount of spurious reflection is minimized. In this article, we review recent results on the construction of absorbing boundary conditions in General Relativity and their application to numerical relativity.
description: 12 pages, no figures, Proceedings of the VII Mexican School on Gravitation and Mathematical Physics, Playa del Carmen, Mexico (Nov. 26 - Dec. 2, 2006)