cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Structural investigations and bacteriophage degradations of Klebsiella capsular polysaccharides
Creators: name: Savage, Angela V.
Publisher: name: University of British Columbia
Year: 2010

description: Seventy-seven serologically different strains of Klebsiella are known. The capsular polysaccharides which these bacteria produce are antigenic, and in order to understand the chemical basis of serological differentiation the structural investigation of the capsular polysaccharides has been undertaken. To date, fifty six structures have been determined. The structures of the capsular antigens isolated from serotypes K12 and K58 are presented here, along with confirmative data for the structure of K23 and a nuclear magnetic resonance investigation of K70 and its specific degradation products. An efficient means of isolating large quantities of the single repeating units of the Klebsiella polysaccharides using glycanase enzymes, borne and utilized by specific bacteriophage, is demonstrated. Klebsiella K21 polysaccharide has been degraded using a highly purified bacteriophage (β-galactopyranosidase activity), while Klebsiella K12 and Klebsiella K41(which have similar structures) have both been degraded using a crude solution of bacteriophage specific for Klebsiella K12 (β-galactofuranosidase activity), and results compared. A preliminary investigation of the use of high pressure liquid chromatography in the structural investigation of hetero-polysaccharides is included, along with appendices containing compilations of the structures and structural patterns of the Klebsiella capsular polysaccharides determined to date. [See thesis for diagram]
Time-irreversibility tests for random-length time series: the matching-time approach applied to DNA
Creators: name: Salgado-García, R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Theory (cs.IT)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: In this work we implement the so-called matching time estimators for estimating the entropy rate as well as the entropy production rate for symbolic sequences. These estimators are based on recurrence properties of the system, which have been shown to be appropriate to test irreversibility specially when the sequences have large correlations or memory. Based on limit theorems for matching-times we derive a maximum likelihood estimator for entropy rate assuming that we have a set of moderately short symbolic time-series of finite random duration. We show that the proposed estimator has several properties that makes it adequate to estimate entropy rate and entropy production rate (or to test irreversibility) when the sample sequences have different lengths such as the coding sequences of DNA. We test our approach in some controlled examples of Markov chains. We also implement our estimators in genomic sequences to show that the degree of irreversibility coding sequences of human DNA is significantly larger than the corresponding non-coding sequences.
description: 10 pages, 7 figures, 1 table
Nonquantum Gravity
Creators: name: Boughn, Stephen
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: One of the great challenges for 21st century physics is to quantize gravity and generate a theory that will unify gravity with the other three fundamental forces of nature. This paper takes the (heretical) point of view that gravity may be an inherently classical, i.e., nonquantum, phenomenon and investigates the experimental consequences of such a model. At present there is no experimental evidence of the quantum nature of gravity and the liklihood of definitive tests in the future is not at all certain. If gravity is, indeed, a nonquantum phenomenon, then it is suggested that evidence will most likely appear at mesoscopic scales.
description: essentially the same as the version that appears in Foundations of Physics, 39, 331 (2009)
Note: Sound velocities of generalized Lennard-Jones ($n-6$) fluids near freezing
Creators: name: Khrapak, Sergey
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: In a recent paper [S. Khrapak, Molecules {\bf 25}, 3498 (2000)] the longitudinal and transverse sound velocities of conventional Lennard-Jones systems at the liquid-solid coexistence were calculated. It was shown that the sound velocities remain almost invariant along the liquid-solid coexistence boundary lines and that their magnitudes are comparable with those of repulsive soft sphere and hard sphere models at the fluid-solid phase transition. This implies that attraction does not affect the magnitude of sound velocities at the fluid-solid phase transition. This paper provides further evidence to this by examining the generalized Lennard-Jones $n$-6 fluids with $n$ ranging from $12$ to $7$ and demonstrating that the steepness of repulsive term has only a minor effect on the magnitude of the sound velocities.
description: 4 pages, 1 figure
A model for the phase separation controlled by doping and the internal chemical pressure in different cuprate superconductors
Creators: name: Kugel, K. I.
name: Rakhmanov, A. L.
name: Sboychakov, A. O.
name: Poccia, Nicola
name: Bianconi, Antonio
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: In the framework of a two-band model, we study the phase separation regime of different kinds of strongly correlated charge carriers as a function of the energy splitting between the two sets of bands. The narrow (wide) band simulates the more localized (more delocalized) type of charge carriers. By assuming that the internal chemical pressure on the CuO$_2$ layer due to interlayer mismatch controls the energy splitting between the two sets of states, the theoretical predictions are able to reproduce the regime of phase separation at doping higher than 1/8 in the experimental pressure-doping-$T_c$ phase diagram of cuprates at large microstrain as it appears in overoxygenated La$_2$CuO$_4$.
description: 8 pages, 5 figures, submitted to Phys. Rev. B
The Nuclear Bulge extinction
Creators: name: Gosling, Andrew J.
name: Blundell, Katherine M.
name: Bandyopadhyay, Reba M.
name: Lucas, Phil
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a new, high resolution (5" per pixel) near-infrared extinction map of the Nuclear Bulge using data from the UKIDSS-GPS. Using photometry from the J, H and K-bands we show that the extinction law parameter is also highly variable in this region on similar scales to the absolute extinction. We show that only when this extinction law variation is taken into account can the extinction be measured consistently at different wavelengths.
description: 3 pages, 2 figures, published in the proceedings of "A population Explosion", AIP Conference Proceedings Volume 1010, pp. 168-170
PES Webinar Series: Optimization is ISOs: Introduction to Optimization and Modeling (Slides)
Creators: Feng Qiu
Argonne National Lab
Yonghong Chen
Midcontinuet Independent System Operator
Feng Pan
Pacific North National Lab
Publisher: name: IEEE
Year: 2020

This webinar presentation: Introduction to modeling and optimization in power systems, Fundamental optimization problems in electricity markets, HIPPO – A High Performance Computer Software Tool; Optimization in utilities; MILP solvers and performance tuning in power system applications; UC + MIPLearn and power system optimization.
This webinar presentation: Introduction to modeling and optimization in power systems, Fundamental optimization problems in electricity markets, HIPPO – A High Performance Computer Software Tool; Optimization in utilities; MILP solvers and performance tuning in power system applications; UC + MIPLearn and power system optimization.
An Interview with Miles J. Edwards M.D.
Creators: name: Oregon Health & Science University
Publisher: name: Oregon Health & Science University Foundation
Year: 2005
Subjects: Oregon Health & Science University. School of Medicine
Pulmonary Medicine
Pancreatic Neoplasms
Antineoplastic Agents
Physician-Patient Relations
Ethics, Medical
Suicide, Assisted

description: Miles J. Edwards was a physician and professor. Edwards completed his medical degree at the University of Oregon Medical School (now the Oregon Health & Science University) in 1956 and his residency at the same university in 1958. After finishing his education, he briefly served in the military before returning to the University of Oregon Medical School to join the faculty in 1964, teaching pulmonary medicine. He remained there until his retirement in 1991.
 This interview largely centers on Edwards’s struggles with pancreatic cancer. Edwards discusses the experience of being a cancer patient after years of working as a doctor and how his diagnosis changed his views on medical care. He also speaks about fatigue from chemotherapy, grappling with mortality and his opinions on medically assisted suicide. Miles J. Edwards died from cancer on March 23, 2006, less than five months after participating in this interview.
Meta-Learning with Variational Semantic Memory for Word Sense Disambiguation
Creators: name: Du, Yingjun
name: Holla, Nithin
name: Zhen, Xiantong
name: Snoek, Cees G. M.
name: Shutova, Ekaterina
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: A critical challenge faced by supervised word sense disambiguation (WSD) is the lack of large annotated datasets with sufficient coverage of words in their diversity of senses. This inspired recent research on few-shot WSD using meta-learning. While such work has successfully applied meta-learning to learn new word senses from very few examples, its performance still lags behind its fully supervised counterpart. Aiming to further close this gap, we propose a model of semantic memory for WSD in a meta-learning setting. Semantic memory encapsulates prior experiences seen throughout the lifetime of the model, which aids better generalization in limited data settings. Our model is based on hierarchical variational inference and incorporates an adaptive memory update rule via a hypernetwork. We show our model advances the state of the art in few-shot WSD, supports effective learning in extremely data scarce (e.g. one-shot) scenarios and produces meaning prototypes that capture similar senses of distinct words.
description: 15 pages, 5 figures
A Review of Machine Learning Classification Using Quantum Annealing for Real-world Applications
Creators: name: Nath, Rajdeep Kumar
name: Thapliyal, Himanshu
name: Humble, Travis S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Optimizing the training of a machine learning pipeline helps in reducing training costs and improving model performance. One such optimizing strategy is quantum annealing, which is an emerging computing paradigm that has shown potential in optimizing the training of a machine learning model. The implementation of a physical quantum annealer has been realized by D-Wave systems and is available to the research community for experiments. Recent experimental results on a variety of machine learning applications using quantum annealing have shown interesting results where the performance of classical machine learning techniques is limited by limited training data and high dimensional features. This article explores the application of D-Wave's quantum annealer for optimizing machine learning pipelines for real-world classification problems. We review the application domains on which a physical quantum annealer has been used to train machine learning classifiers. We discuss and analyze the experiments performed on the D-Wave quantum annealer for applications such as image recognition, remote sensing imagery, computational biology, and particle physics. We discuss the possible advantages and the problems for which quantum annealing is likely to be advantageous over classical computation.
description: 13 Pages
Light propagation in a birefringent plates with topological charge
Creators: name: Karimi, Ebrahim
name: Piccirillo, Bruno
name: Marrucci, Lorenzo
name: Santamato, Enrico
Publisher: name: arXiv
Year: 2008
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We calculated the Fresnel paraxial propagator in a birefringent plate having topological charge $q$ at its center, named "$q$-plate". We studied the change of the beam transverse profile when it traverses the plate. An analytical closed form of the beam profile propagating in the "$q$-plate" can be found for many important specific input beam profiles. We paid particular attention to the plate having a topological unit charge and we found that if small losses due to reflection, absorption and scattering are neglected, the plate can convert the photon spin into orbital angular momentum with up to 100% efficiency, provided the thickness of the plate is less than the Rayleigh range of the incident beam.
description: 3 pages and 3 figures. Optics Letters style
The Second Discovery from the COol Companions ON Ultrawide orbiTS (COCONUTS) Program: A Cold Wide-Orbit Exoplanet around a Young Field M Dwarf at 10.9 pc
Creators: name: Zhang, Zhoujian
name: Liu, Michael C.
name: Claytor, Zachary R.
name: Best, William M. J.
name: Dupuy, Trent J.
name: Siverd, Robert J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present the identification of the COCONUTS-2 system, composed of the M3 dwarf L 34-26 and the T9 dwarf WISEPA J075108.79$-$763449.6. Given their common proper motions and parallaxes, these two field objects constitute a physically bound pair with a projected separation of 594$"$ (6471 au). The primary star COCONUTS-2A has strong stellar activity (H$α$, X-ray, and UV emission) and is rapidly rotating ($P_{\rm rot} = 2.83$ days), from which we estimate an age of 150-800 Myr. Comparing equatorial rotational velocity derived from the TESS light curve to spectroscopic $v\sin{i}$, we find COCONUTS-2A has a nearly edge-on inclination. The wide exoplanet COCONUTS-2b has an effective temperature of $T_{\rm eff}=434 \pm 9$ K, a surface gravity of $\log{g} = 4.11^{+0.11}_{-0.18}$ dex, and a mass of $M=6.3^{+1.5}_{-1.9}$ $M_{\rm Jup}$ based on hot-start evolutionary models, leading to a $0.016^{+0.004}_{-0.005}$ mass ratio for the COCONUTS-2 system. COCONUTS-2b is the second coldest (after WD 0806$-$661B) and the second widest (after TYC 9486-927-1 b) exoplanet imaged to date. Comparison of COCONUTS-2b's infrared photometry with ultracool model atmospheres suggests the presence of both condensate clouds and non-equilibrium chemistry in its photosphere. Similar to 51 Eri b, COCONUTS-2b has a sufficiently low luminosity ($\log{(L_{\rm bol}/L_{\odot})} = -6.384 \pm 0.028$ dex) to be consistent with the cold-start process that may form gas-giant (exo)planets, though its large separation means such formation would not have occurred in situ. Finally, at a distance of 10.9 pc, COCONUTS-2b is the nearest imaged exoplanet to Earth known to date.
description: Accepted for publication in ApJ Letters
title: Front Matter, Table of Contents, Preface, Conference Organization
Creators: name: Tauman Kalai, Yael
name: Smith, Adam D.
name: Wichs, Daniel
Publisher: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Year: 2020
Subjects: subject: Front Matter
subject: Table of Contents
subject: Preface
subject: Conference Organization
subject: Security and privacy → Cryptography
subject: Mathematics of computing → Information theory
subject: Theory of computation → Computational complexity and cryptography

description: Front Matter, Table of Contents, Preface, Conference Organization
description: LIPIcs, Vol. 163, 1st Conference on Information-Theoretic Cryptography (ITC 2020), pages 0:i-0:xiv
title: Quantitative Characterization of Nanometer-Scale Electric Fields via Momentum-Resolved STEM
Creators: name: Beyer, Andreas
name: Munde, Manveer Singh
name: Firoozabadi, Saleh
name: Heimes, Damien
name: Grieb, Tim
name: Rosenauer, Andreas
name: Müller-Caspary, Knut
name: Volz, Kerstin
Publisher: name: Philipps-Universität Marburg
Year: 2021
Subjects: 4DSTEM
Physics
Physik
transmission electron microscopy
p−n junctions
electric field measurements
momentum-resolved STEM

description: Most of today’s electronic devices, like solar cells and batteries, are based on nanometer-scale built-in electric fields. Accordingly, characterization of fields at such small scales has become an important task in the optimization of these devices. In this study, with GaAs-based p−n junctions as the example, key characteristics such as doping concentrations, polarity, and the depletion width are derived quantitatively using four-dimensional scanning transmission electron microscopy (4DSTEM). The built-in electric fields are determined by the shift they introduce to the center-of-mass of electron diffraction patterns at subnanometer spatial resolution. The method is applied successfully to characterize two p−n junctions with different doping concentrations. This highlights the potential of this method to directly visualize intentional or unintentional nanoscale electric fields in real-life devices, e.g., batteries, transistors, and solar cells.
Transition metal derivatives of asymmetric pyrazolylgallate ligands
Creators: name: Chong, Kenneth Samuel
Publisher: name: University of British Columbia
Year: 2010

description: The reaction of sodium pyrazolide or sodium 3,5-dimethyl-pyrazolide with trimethyl gallium followed by reaction of the resultant adduct with 'ethanolamine' produces novel asymmetric tridentate ligands which are capable of either meridional or facial coordination in transition metal complexes. Na⁺('pz')⁻ + Me₃Ga THF> Na⁺[Me₃Ga ('pz’) ] ⁻ Na⁺[Me₃Ga ('pz’) ] ⁻+ R’ ₂NCH₂CH₂OH₂ > Na⁺L⁻ + MeH With R' = H, these ligands react with divalent transition metal ions to give octahedral bis-ligand complexes. However with R’ = Me, reaction with divalent transition metal ions produced either trigonal bipyramidal (R = Me) or binuclear five-coordinate (R = H) complexes. The asymmetric chelating gallate ligands reacted with Mn(CO)₅Br to give LMn(CO)₃ and with appropriate Gp VI carbonyl derivatives to give LM(CO)₃⁻ ( M = Cr, Mo, W). The carbonyl anions were found to be stereochemically non-rigid in solution and a mechanism for the fluxional process is proposed. Reaction of LM(CO)₃⁻(M = Mo, W) with various three-electron ligands gave derivatives of the form, LM(CO)₂T (T = NO, N₂Ph, C₃H₅ C₄H₇, C₇H₇, and CH₂SMe). A similar fluxional process (to that found in the carbonyl anions) was found in the complex, [Me₂Ga(pz)(OCH₂CH₂NH₂)] Mo(CO)₂(n³ -C₄H₇). In addition, the cycloheptatrienyl derivatives were found to be fluxional as a result of a rapidly rotating C₇H₇ ring. Depending on the nature of T, the LM(CO)₂T derivatives can exhibit both positional and conformational isomerism and this subject is discussed in detail. Reaction of Na⁺L⁻ (R = R'= Me) with Ni(NO)I and Cu(PPh₃)Br gave LNi(NO) and LCu(PPh₃) respectively. Both of these molecules were found to be fluxional in solution and a similar mechanism to that proposed for the Gp VI carbonyl ions is invoked to explain these fluxional processes. The compounds, LMn(NO)₂ and LFe(NO)₂ (19-electron) were prepared by reaction of Na+L- (R = R'= Me) with appropriate metal dinitrosyl precursors.and are the first of their type to be synthesized. Finally, reaction of Na+L- (R = R'= Me) with Mo(NO)₂Cl₂ gave LMo(NO)₂Cl. In additon to studies involving the ligand L, the pyrazolyl bridged dimers [Ni('pz’)(NO)]₂, [Fe('pz')(NO)₂]₂ and [Co('pz')(NO)₂]₂ were prepared and their reactivity towards nucleophiles studied. The π-allyl compounds [Me₂Ga (pz" )₂]M (C₃H₅) (M = Ni or Pd) and [Ni (pz") (C₃H₅) ]"₂were also prepared. All the prepared compounds were systematically characterized with uv-vis, ir and XH nmr spectroscopy as well as mass spectrometry. In addition, x-ray studies were carried out (by Dr. S. Rettig) on several of the prepared compounds and these data are correlated with other physical measurements.
PES Webinar Series: UC + MIPLearn and Power System Optimization (Slides)
Creators: Zonghao Gu
Publisher: name: IEEE
Year: 2020

This webinar presentation: Introduction to modeling and optimization in power systems, Fundamental optimization problems in electricity markets, HIPPO – A High Performance Computer Software Tool; Optimization in utilities; MILP solvers and performance tuning in power system applications; UC + MIPLearn and power system optimization.
This webinar presentation: Introduction to modeling and optimization in power systems, Fundamental optimization problems in electricity markets, HIPPO – A High Performance Computer Software Tool; Optimization in utilities; MILP solvers and performance tuning in power system applications; UC + MIPLearn and power system optimization.
P4-PDX-seq.xlsx
Creators: name: Liu, Zefeng
Publisher: name: figshare
Year: 2021
Subjects: subject: 60408 Genomics
subject: FOS: Biological sciences

description: 使用lncRNA测序分析鉴定用载体或索拉非尼处理的P4-PDX之间差异表达的lncRNA
IEEE PES Webinar Series: An Energy Internet Platform for Transactive Energy Applications (Slides)
Creators: Professor Saifur Rahman
Publisher: name: IEEE
Year: 2020

Thanks to the widespread deployment of phasor measurement units, the development of a fast and robust DSE becomes possible. This webinar will present a comprehensive view of the DSE, in terms of its motivations, concepts, implementation and applications. The similarities and differences between DSE and other existing estimation methods will be clarified. Furthermore, the roles of DSE for power system modeling, monitoring, operation, stability control and protection will be demonstrated.
Thanks to the widespread deployment of phasor measurement units, the development of a fast and robust DSE becomes possible. This webinar will present a comprehensive view of the DSE, in terms of its motivations, concepts, implementation and applications. The similarities and differences between DSE and other existing estimation methods will be clarified. Furthermore, the roles of DSE for power system modeling, monitoring, operation, stability control and protection will be demonstrated.
PES Webinar Series: UC + MIPLearn and Power System Optimization (Slides)
Creators: Feng Qiu
Alinson Santos Xavier
Publisher: name: IEEE
Year: 2020

This webinar presentation: Introduction to modeling and optimization in power systems, Fundamental optimization problems in electricity markets, HIPPO – A High Performance Computer Software Tool; Optimization in utilities; MILP solvers and performance tuning in power system applications; UC + MIPLearn and power system optimization.
This webinar presentation: Introduction to modeling and optimization in power systems, Fundamental optimization problems in electricity markets, HIPPO – A High Performance Computer Software Tool; Optimization in utilities; MILP solvers and performance tuning in power system applications; UC + MIPLearn and power system optimization.
IEEE PES Webinar Series: An Energy Internet Platform for Transactive Energy Applications (Slides)
Creators: Professor Saifur Rahman
Publisher: name: IEEE
Year: 2020

For over a century, the structure of the electric utility business has been a supplier-driven model with consumers receiving and paying for electricity without any participation in how the electricity is produced, transmitted, or delivered. However, advances in renewable energy technologies (e.g., PV panels), battery storage, smart devices, as well as financing models have given rise to prosumers - electricity consumers - who can produce energy from rooftop PV while also consuming from the grid. These prosumers are interested in monetizing the value of their investment/production whereas regular consumers desire cheaper electricity prices. A software platform, called the “Energy Internet” (EI) platform, has been developed which uses the blockchain technology to securely manage data, communications, and control of devices among different participants on a large scale. This structure allows the development and testing of a functioning energy internet platform for transactive energy applications.
For over a century, the structure of the electric utility business has been a supplier-driven model with consumers receiving and paying for electricity without any participation in how the electricity is produced, transmitted, or delivered. However, advances in renewable energy technologies (e.g., PV panels), battery storage, smart devices, as well as financing models have given rise to prosumers - electricity consumers - who can produce energy from rooftop PV while also consuming from the grid. These prosumers are interested in monetizing the value of their investment/production whereas regular consumers desire cheaper electricity prices. A software platform, called the “Energy Internet” (EI) platform, has been developed which uses the blockchain technology to securely manage data, communications, and control of devices among different participants on a large scale. This structure allows the development and testing of a functioning energy internet platform for transactive energy applications.
Microgrid With Inverter Based DERs: Challenges and Lessons Learned (Slides)
Creators: Aleksandar Vukojevic
Publisher: name: IEEE
Year: 2020

In traditional power system, effective grounding on the feeder is provided by the substation transformer. In recent years, microgrids have started to gain more traction. The biggest challenge with the design of microgrid is the design of effective grounding, because once the microgrid disconnects from the grid, it loses its ground source. For that reason, a new grounding source, a grounding transformer, is required in order to maintain the stability of the microgrid and in order to ensure the compliance with existing standards. This webinar will cover the basic principles of system grounding, the impact of DER transformer configuration on feeder fault current levels, five reasons for the grounding transformer within the microgrid with inverter-based DERs, challenges with the design of grounding transformer using the existing standards and the behavior of the grounding transformer under the line to ground fault within the electric utility's microgrid.
In traditional power system, effective grounding on the feeder is provided by the substation transformer. In recent years, microgrids have started to gain more traction. The biggest challenge with the design of microgrid is the design of effective grounding, because once the microgrid disconnects from the grid, it loses its ground source. For that reason, a new grounding source, a grounding transformer, is required in order to maintain the stability of the microgrid and in order to ensure the compliance with existing standards. This webinar will cover the basic principles of system grounding, the impact of DER transformer configuration on feeder fault current levels, five reasons for the grounding transformer within the microgrid with inverter-based DERs, challenges with the design of grounding transformer using the existing standards and the behavior of the grounding transformer under the line to ground fault within the electric utility's microgrid.
GLOW: An Open-source Distribution Planning Tool Based on GridLAB-D (Slides)
Creators: Bo Yang
Panitarn Chongfuangprinya
Publisher: name: IEEE
Year: 2020

This webinar presentation: The adoption of smart grid and DERs have grown significantly in the last decade. This leads to impacts on the grid that need to be analyzed. One of the most advanced tools for impact studies is GridLAB-D. However, a command-line interface is a common method to use GridLAB-D thus it is prevalent only among experienced users.
In this talk, we will provide the background policies, requirements, and use cases related to DERs integration. We will present the current development of GridLAB-D Open Workspace (GLOW) which is an open-source distribution planning platform based on GridLAB-D. With addition of a GUI, GLOW provides a user-friendly environment for all stakeholders involved in deployment of DERs. We will demonstrate GLOW through a web-based UI on a cloud computing platform. This talk will also include the future development of GLOW for a beta release in 2021.
This webinar presentation: The adoption of smart grid and DERs have grown significantly in the last decade. This leads to impacts on the grid that need to be analyzed. One of the most advanced tools for impact studies is GridLAB-D. However, a command-line interface is a common method to use GridLAB-D thus it is prevalent only among experienced users.
In this talk, we will provide the background policies, requirements, and use cases related to DERs integration. We will present the current development of GridLAB-D Open Workspace (GLOW) which is an open-source distribution planning platform based on GridLAB-D. With addition of a GUI, GLOW provides a user-friendly environment for all stakeholders involved in deployment of DERs. We will demonstrate GLOW through a web-based UI on a cloud computing platform. This talk will also include the future development of GLOW for a beta release in 2021.
The most luminous blue quasars at 3.0
Creators: name: Lusso, Elisabeta
name: Nardini, Emanuele
name: Bisogni, Susanna
name: Risaliti, Guido
name: Gilli, Roberto
name: Richards, Gordon T.
name: Salvestrini, Francesco
name: Vignali, Cristian
name: Bargiacchi, Giada
name: Civano, Francesca
name: Elvis, Martin
name: Fabbiano, Giuseppina
name: Marconi, Alessandro
name: Sacchi, Andrea
name: Signorini, Matilde
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We analyse the properties of the CIV broad emission line in connection with the X-ray emission of 30 bright SDSS quasars at z~3.0-3.3 with pointed XMM-Newton observations, which were selected to test the suitability of AGN as cosmological tools. In our previous work, we found that a large fraction (~25%) of the quasars in this sample are X-ray underluminous by factors of >3-10. As absorbing columns of >10$^{23}$ cm$^{-2}$ can be safely ruled out, their weakness is most likely intrinsic. Here we explore possible correlations between the UV and X-ray features of these sources to investigate the origin of X-ray weakness. We fit their UV SDSS spectra and analyse their CIV properties (e.g., equivalent width, EW; line peak velocity, $\upsilon_{\rm peak}$) as a function of the X-ray photon index and 2-10 keV flux. We confirm the trends of CIV $\upsilon_{\rm peak}$ and EW with UV luminosity at 2500 angstrom for both X-ray weak and X-ray normal quasars, as well as the correlation between X-ray weakness and CIV EW. In contrast to some recent work, we do not observe any clear relation between the 2-10 keV luminosity and $\upsilon_{\rm peak}$. We find a correlation between the hard X-ray flux and the integrated CIV flux for X-ray normal quasars, whilst X-ray weak quasars deviate from the main trend by more than 0.5 dex. We argue that X-ray weakness might be interpreted in a starved X-ray corona picture associated with an ongoing disc-wind phase. If the wind is ejected in the vicinity of the black hole, the extreme-UV radiation that reaches the corona will be depleted, depriving the corona of seeds photons and generating an X-ray weak quasar. Yet, at the largest UV luminosities (>10$^{47}$ erg s$^{-1}$), there will still be an ample reservoir of ionising photons that can explain the excess CIV emission observed in the X-ray weak quasars with respect to normal sources of similar X-ray luminosities.
description: 22 pages, 15 figures (with 3 more figures in the Appendix), abstract abridged. Accepted for publication in A&A
Ruin models with investment income
Creators: name: Paulsen, Jostein
Publisher: name: arXiv
Year: 2008
Subjects: subject: Risk Management (q-fin.RM)
subject: Probability (math.PR)
subject: FOS: Economics and business
subject: FOS: Mathematics
subject: 60G99 (Primary) 60G40, 60G44, 60J25, 60J75 (Secondary)

description: This survey treats the problem of ruin in a risk model when assets earn investment income. In addition to a general presentation of the problem, topics covered are a presentation of the relevant integro-differential equations, exact and numerical solutions, asymptotic results, bounds on the ruin probability and also the possibility of minimizing the ruin probability by investment and possibly reinsurance control. The main emphasis is on continuous time models, but discrete time models are also covered. A fairly extensive list of references is provided, particularly of papers published after 1998. For more references to papers published before that, the reader can consult [47].
description: Published in at http://dx.doi.org/10.1214/08-PS134 the Probability Surveys (http://www.i-journals.org/ps/) by the Institute of Mathematical Statistics (http://www.imstat.org)
A novel optical needle probe for deep learning-based tissue elasticity characterization
Creators: name: Mieling, Robin
name: Sprenger, Johanna
name: Latus, Sarah
name: Bargsten, Lennart
name: Schlaefer, Alexander
Publisher: name: arXiv
Year: 2021
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: The distinction between malignant and benign tumors is essential to the treatment of cancer. The tissue's elasticity can be used as an indicator for the required tissue characterization. Optical coherence elastography (OCE) probes have been proposed for needle insertions but have so far lacked the necessary load sensing capabilities. We present a novel OCE needle probe that provides simultaneous optical coherence tomography (OCT) imaging and load sensing at the needle tip. We demonstrate the application of the needle probe in indentation experiments on gelatin phantoms with varying gelatin concentrations. We further implement two deep learning methods for the end-to-end sample characterization from the acquired OCT data. We report the estimation of gelatin sample concentrations in unseen samples with a mean error of $1.21 \pm 0.91$ wt\%. Both evaluated deep learning models successfully provide sample characterization with different advantages regarding the accuracy and inference time.
description: Accepted at CURAC 2021, 2nd Place in the Best Paper Awards
PES Webinar Series: Optimization in Utilities: Mainstream Optimization Problems in Utilities (Slides)
Creators: Feng Qiu
Argonne National Lab
Yonghong Chen
Midcontinuet Independent System Operator
Feng Pan
Pacific North National Lab
Publisher: name: IEEE
Year: 2020

This webinar presentation: Introduction to modeling and optimization in power systems, Fundamental optimization problems in electricity markets, HIPPO – A High Performance Computer Software Tool; Optimization in utilities; MILP solvers and performance tuning in power system applications; UC + MIPLearn and power system optimization.
This webinar presentation: Introduction to modeling and optimization in power systems, Fundamental optimization problems in electricity markets, HIPPO – A High Performance Computer Software Tool; Optimization in utilities; MILP solvers and performance tuning in power system applications; UC + MIPLearn and power system optimization.
Quantifying nanoscale electromagnetic fields in near-field microscopy by Fourier demodulation analysis
Creators: name: Mooshammer, Fabian
name: Huber, Markus A.
name: Sandner, Fabian
name: Plankl, Markus
name: Zizlsperger, Martin
name: Huber, Rupert
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Confining light to sharp metal tips has become a versatile technique to study optical and electronic properties far below the diffraction limit. Particularly near-field microscopy in the mid-infrared spectral range has found a variety of applications in probing nanostructures and their dynamics. Yet, the ongoing quest for ultimately high spatial resolution down to the single-nanometer regime and quantitative three-dimensional nano-tomography depends vitally on a precise knowledge of the spatial distribution of the near fields emerging from the probe. Here, we perform finite element simulations of a tip with realistic geometry oscillating above a dielectric sample. By introducing a novel Fourier demodulation analysis of the electric field at each point in space, we reliably quantify the distribution of the near fields above and within the sample. Besides inferring the lateral field extension, which can be smaller than the tip radius of curvature, we also quantify the probing volume within the sample. Finally, we visualize the scattering process into the far field at a given demodulation order, for the first time, and shed light onto the nanoscale distribution of the near fields and its evolution as the tip-sample distance is varied. Our work represents a crucial step in understanding and tailoring the spatial distribution of evanescent fields in optical nanoscopy.
description: This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Photonics (copyright \copyright American Chemical Society) after peer review and technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/doi/10.1021/acsphotonics.9b01533
PES Webinar Series: Dynamic State and Parameter Estimation for Power System Control and Protection (Slides)
Creators: Junbo Zhao
Publisher: name: IEEE
Year: 2020

Thanks to the widespread deployment of phasor measurement units, the development of a fast and robust DSE becomes possible. This webinar will present a comprehensive view of the DSE, in terms of its motivations, concepts, implementation and applications. The similarities and differences between DSE and other existing estimation methods will be clarified. Furthermore, the roles of DSE for power system modeling, monitoring, operation, stability control and protection will be demonstrated.
Thanks to the widespread deployment of phasor measurement units, the development of a fast and robust DSE becomes possible. This webinar will present a comprehensive view of the DSE, in terms of its motivations, concepts, implementation and applications. The similarities and differences between DSE and other existing estimation methods will be clarified. Furthermore, the roles of DSE for power system modeling, monitoring, operation, stability control and protection will be demonstrated.
Modeling X-ray emission from stellar coronae
Creators: name: Gregory, S. G.
name: Jardine, M.
name: Argiroffi, C.
name: Donati, J. -F.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: By extrapolating from observationally derived surface magnetograms of low-mass stars we construct models of their coronal magnetic fields and compare the 3D field geometry with axial multipoles. AB Dor, which has a radiative core, has a very complex field, whereas V374 Peg, which is completely convective, has a simple dipolar field. We calculate global X-ray emission measures assuming that the plasma trapped along the coronal loops is in hydrostatic equilibrium and compare the differences between assuming isothermal coronae, or by considering a loop temperature profiles. Our preliminary results suggest that the non-isothermal model works well for the complex field of AB Dor, but not for the simple field of V374 Peg.
description: 4 pages, proceedings of Cool Stars 15, St Andrews, July 2008, to be published in the Conference Proceedings Series of the American Institute of Physics
The implicit equation of a canal surface
Creators: name: Dohm, Marc
name: Zube, Severinas
Publisher: name: arXiv
Year: 2008
Subjects: subject: Algebraic Geometry (math.AG)
subject: Symbolic Computation (cs.SC)
subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: A canal surface is an envelope of a one parameter family of spheres. In this paper we present an efficient algorithm for computing the implicit equation of a canal surface generated by a rational family of spheres. By using Laguerre and Lie geometries, we relate the equation of the canal surface to the equation of a dual variety of a certain curve in 5-dimensional projective space. We define the μ-basis for arbitrary dimension and give a simple algorithm for its computation. This is then applied to the dual variety, which allows us to deduce the implicit equations of the the dual variety, the canal surface and any offset to the canal surface.
description: 26 pages, to be published in Journal of Symbolic Computation
Few-Shot Emotion Recognition in Conversation with Sequential Prototypical Networks
Creators: name: Guibon, Gaël
name: Labeau, Matthieu
name: Flamein, Hélène
name: Lefeuvre, Luce
name: Clavel, Chloé
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computation and Language (cs.CL)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Several recent studies on dyadic human-human interactions have been done on conversations without specific business objectives. However, many companies might benefit from studies dedicated to more precise environments such as after sales services or customer satisfaction surveys. In this work, we place ourselves in the scope of a live chat customer service in which we want to detect emotions and their evolution in the conversation flow. This context leads to multiple challenges that range from exploiting restricted, small and mostly unlabeled datasets to finding and adapting methods for such context.We tackle these challenges by using Few-Shot Learning while making the hypothesis it can serve conversational emotion classification for different languages and sparse labels. We contribute by proposing a variation of Prototypical Networks for sequence labeling in conversation that we name ProtoSeq. We test this method on two datasets with different languages: daily conversations in English and customer service chat conversations in French. When applied to emotion classification in conversations, our method proved to be competitive even when compared to other ones.
The violation of Bell-CHSH inequalities leads to different conclusions depending on the description used
Creators: name: Solis-Labastida, Aldo F. G.
name: Gastelum, Melina
name: Hirsch, Jorge G.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Since the experimental observation of the violation of the Bell-CHSH inequalities, much has been said about the non-local and contextual character of the underlying system. But the hypothesis from which Bell's inequalities are derived differ according to the probability space used to write them. The violation of Bell's inequalities can, alternatively, be explained assuming that the hidden variables do not exist at all, or that they exist but their values cannot be simultaneously assigned, or that the values can be assigned but joint probabilities cannot be properly defined, or that averages taken in different contexts cannot be combined. All of the above are valid options, selected by different communities to provide support to their particular research program.
description: 18 pages, journal: Entropy, volume: Quantum Probability and Randomness III (in press)
Synthetic routes from camphor to longicamphane and picrotoxane derivatives
Creators: name: Cachia, Paul Joseph
Publisher: name: University of British Columbia
Year: 2010

description: Camphor has been functionalized at the C-(8) position by treating (+)-3,3-dibromocamphor with bromine and chlorosulphonic acid. A mechanistic rationalization is proposed for this transformation which accounts for the presence of the minor side products that form during 8- and 9-bromination. (+)-8-Bromo-camphor produced by this method was subsequently used as a key intermediate in sesquiterpenoid synthesis. Approaches to the synthesis of both the longicamphane and picrotoxane carbon frameworks are discussed. Our approach to the synthesis of the longicamphane framework involved intramolecular Michael-addition of 9-oxocampherenone. While investigating a proposed synthesis of 9-oxocampherenone via Meyer-Schuster rearrangement of 8-(3-hydroxy-3-methyl-l-butynyl)camphor ethylene acetal an interesting new reaction occurred providing the polycyclic ring system (+)-6,7-dimethyl-6-(l-oxo-2-methylpropyl)tricycle [4 • 2 • 1 • 0³ ' ⁷] nonan-9-one whose structure was determined by X-ray erystallographic analysis. A mechanism for its formations is proposed. Attempts to synthesize 9-oxocampherenone by allylic oxidation of 9-hydroxycam-pherenone and its ethylene acetal derivative are also discussed. Our synthetic approach to the picrotoxane framework involves Baeyer-Villiger oxidation-translactonization of a suitable copacamphor-type derivative. In our first approach the attempted synthesis of 4-hydroxycopacamphor via intramolecular epoxide cyclization of 8-(1,2-epoxy-3-methylbutyl)camphor provided the tricyclic ketol 1,6-dimethyl-4-(l-hydroxy-2-methylpropyl)tri-cyclo [4 • 3 • 0 • 0³ ' ⁷] nonan-2-one . This 5-membered ring cyclization product was formed exclusively during the reaction. The strategy was revised to exclude 5-membered ring formation; the cyclization would be performed on 8-acetoxycampherenone epoxide. The synthesis of 8-acetoxycampherenol methyl ether is discussed and its potential conversion to 8-acetoxycampherenone epoxide is described.
The magnetic fields of accreting T Tauri stars
Creators: name: Gregory, S. G.
name: Matt, S. P.
name: Donati, J. -F.
name: Jardine, M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Models of magnetospheric accretion on to classical T Tauri stars often assume that the stellar magnetic field is a simple dipole. Recent Zeeman-Doppler imaging studies of V2129 Oph and BP Tau have shown however that their magnetic fields are more complex. V2129 Oph is a high mass T Tauri star and despite its young age is believed to have already developed a radiative core. In contrast to this, the lower mass BP Tau is likely to be completely convective. As the internal structure and therefore the magnetic field generation process is different in both stars, it is of particular interest to compare the structure of their magnetic fields obtained by field extrapolation from magnetic surface maps. We compare both field structures to mulitpole magnetic fields, and calculate the disk truncation radius for both systems. We find that by considering magnetic fields with a realistic degree of complexity, the disk is truncated at, or within, the radius obtained for dipole fields.
description: 6 pages, proceedings of Cool Stars 15, St Andrews, July 2008, to be published in the Conference Proceedings Series of the American Institute of Physics