cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Interaction of CO2 laser light with a dense Z-pinch plasma
Creators: name: Albrecht, Georg F.
Publisher: name: University of British Columbia
Year: 2010

description: The interaction of a 250 MW CO₂ laser pulse with a Z-pinch plasma has been observed. Heating by inverse bremsstrahlung and stimulated Brilloum scattering off a plasma with a few times 10¹⁷ electrons/cm³, T[sub e] ~ 150 eV and temperature scale lengths of a few mm is shown to occur. The observed angular dependence of the Brillouin backscattered light is in good agreement with current theories. Some of the backscattered light shows intensity modulations at the electron gyro frequency. Finally, the successful nano second gating of an Optical Multichannel Analyser is described and applied to spectroscopical density measurements of the plasma.
2019 IEEE General Meeting 8/7 Panel Presentation: Concept of “Smart Cities” in the Southeastern Region of the US
Creators: D. Pucilowski
J. Nicholas
Publisher: name: IEEE
Year: 2019

2019 IEEE General Meeting 8/7 Panel Presentation: Concept of �Smart Cities� in the Southeastern Region of the US
The smart city concept integrates information and communication technology (ICT), and various physical devices connected to the network (the Internet of things or IoT) to optimize the efficiency of city operations and services and connect to citizens. Some of the business applications for utilities include leasing space on light and power poles, providing cities with "intelligence as a service", ubiquitous Wi-Fi, and community and economic development. As a new business line, it perfectly fits with ongoing quest to make our customers' lives better. This panel session will feature few presentations to shed light on various initiatives undertaken by local utilities in regard to Smart Cities.
Origin of the spin density wave instability in AFe$_2$As$_2$ (A=Ba, Sr) as revealed by optical spectroscopy
Creators: name: Hu, W. Z.
name: Dong, J.
name: Li, G.
name: Li, Z.
name: Zheng, P.
name: Chen, G. F.
name: Luo, J. L.
name: Wang, N. L.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We performed optical spectroscopy measurement on single crystals of BaFe$_2$As$_2$ and SrFe$_2$As$_2$, the parent compounds of FeAs based superconductors. Both are found to be quite metallic with fairly large plasma frequencies at high temperature. Upon entering the spin-density-wave (SDW) state, formation of partial energy gaps was clearly observed with the presence of surprisingly two different energy scales. A large part of the Drude component was removed by the gapping of Fermi surfaces (FS). Meanwhile, the carrier scattering rate was even more dramatically reduced. We elaborate that the SDW instability is more likely to be driven by the FS nesting of itinerant electrons rather than a local-exchange mechanism.
description: 5 pages, 2 figures; Phys. Rev. Lett. (accepted)
Criteria for strong and weak random attractors
Creators: name: Crauel, Hans
name: Dimitroff, Georgi
name: Scheutzow, Michael
Publisher: name: arXiv
Year: 2008
Subjects: subject: Probability (math.PR)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 60H25 (Primary), 37B25, 37H99, 37L55, 60D05

description: The theory of random attractors has different notions of attraction, amongst them pullback attraction and weak attraction. We investigate necessary and sufficient conditions for the existence of pullback attractors as well as of weak attractors.
The multicomponent 2D Toda hierarchy: Discrete flows and string equations
Creators: name: Manas, Manuel
name: Alonso, Luis Martinez
name: Fernandez, Carlos Alvarez
Publisher: name: arXiv
Year: 2008
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The multicomponent 2D Toda hierarchy is analyzed through a factorization problem associated to an infinite-dimensional group. A new set of discrete flows is considered and the corresponding Lax and Zakharov--Shabat equations are characterized. Reductions of block Toeplitz and Hankel bi-infinite matrix types are proposed and studied. Orlov--Schulman operators, string equations and additional symmetries (discrete and continuous) are considered. The continuous-discrete Lax equations are shown to be equivalent to a factorization problem as well as to a set of string equations. A congruence method to derive site independent equations is presented and used to derive equations in the discrete multicomponent KP sector (and also for its modification) of the theory as well as dispersive Whitham equations.
description: 27 pages. In the revised paper we improved the presentation
Experimental Dispersion Relation of Surface Waves Along a Torus of Fluid
Creators: name: Novkoski, Filip
name: Falcon, Eric
name: Pham, Chi-Tuong
Publisher: name: arXiv
Year: 2021
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Classical Physics (physics.class-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We report the observation of gravity-capillary waves on a torus of fluid. By means of an original technique, a stable torus is achieved by depositing water on a superhydrophobic groove with a shallow wedge-shaped channel running along its perimeter. Using a spatio-temporal optical measurement, we report the full dispersion relation of azimuthal waves propagating along the inner and outer torus borders, highlighting several branches modeled as varicose, sinuous and sloshing modes. Standing azimuthal waves are also studied leading to polygon-like patterns arising on the two torus borders with a number of sides different when a tunable decoupling of the two interfaces occurs. The quantized nature of the dispersion relation is also evidenced.
description: In press
Phase and vortex correlations in Josephson-junction arrays at irrational frustration
Creators: name: Granato, Enzo
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Phase coherence and vortex order in a Josephson-junction array at irrational frustration are studied by extensive Monte Carlo simulations using the parallel tempering method. A scaling analysis of the correlation length of phase variables in the full equilibrated system shows that the critical temperature vanishes with a power-law divergent correlation length and critical exponent $ν_{ph}$, in agreement with recent results from resistivity scaling analysis. A similar scaling analysis for vortex variables reveals a different critical exponent $ν_{v}$, suggesting that there are two distinct correlation lengths associated with a decoupled zero-temperature phase transition.
description: 4 pages, 4 figures, to appear in Phys. Rev. Lett
Common monitoring and evaluation system and database of monitoring indicators
Creators: name: Holstein, Philippe
name: Bigey, Gaston
Publisher: name: Zenodo
Year: 2020
Subjects: ORs
Outermost regions
Research
Innovation
Monitoring
Research excellence

description: Project deliverable outlining a common monitoring system and database of indicators, allowing Outermost Region partners to constantly and effectively monitor their progress during the implementation of the strategies co-created within the project.
K.A. Thompson's NSERC CGS-M Proposal
Creators: name: Thompson, Ken
Publisher: name: figshare
Year: 2021
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: 60411 Population, Ecological and Evolutionary Genetics
subject: Plant Biology

description: This is my funded NSERC CGS-M proposal from 2014 (applied 2013).
A simple variational principle for classical spinning particle with anomalous magnetic momentum
Creators: name: Pol'shin, S. A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We obtain Bargmann-Michel-Telegdi equations of motion of classical spinning particle using Lagrangian variational principle with Grassmann variables.
description: 3 pages, latex
Overhead Transmission line Uprating and Upgrading
Creators: O. Lynch
J. McCall
D. Wabnegger
D. Bryant
Publisher: name: IEEE
Year: 2018

2018 PES T&D Panel Presentation
This panel will address overhead line uprating and upgrading feasibility and the major feasibility aspects to be taken into account before deciding to go ahead with an uprating or upgrading project. Lecture #1 (Computer Aided Overhead Line Upgrading) will present state-of-theart computational resources available to the process of overhead line upgrading. Lecture #2 (Overhead Line Uprating via Real Time Thermal Rate Monitoring) will demonstrate proven techniques and hardware for the thermal uprating of overhead lines. Lecture #3 (Outage-Free Overhead Line Reconductoring) will introduce live line techniques for the reconductoring of overhead lines. Lecture #4 (Advanced Materials for Overhead Line Reconductoring) will focus on the engineering aspects associated with the application of new conductor materials for increasing the power transfer capability of overhead lines.
Penpulimab: First Approval
Creators: name: Dhillon, Sohita
Publisher: name: Adis Journals
Year: 2021
Subjects: Medicine

description: DeclarationsFunding The preparation of this review was not supported by any external funding.
Authorship and Conflict of interest During the peer review process the manufacturer of the agent under review was offered an opportunity to comment on the article. Changes resulting from any comments received were made by the authors on the basis of scientific completeness and accuracy. Sohita Dhillon is a contracted employee of Adis International Ltd/Springer Nature, and declares no relevant conflicts of interest. All authors contributed to the review and are responsible for the article content.Ethics approval, Consent to participate, Consent to publish, Availability of data and material, Code availability Not applicable.
Additional information about this Adis Drug Review can be found here
Abstract
Penpulimab (安尼可®) is a humanised anti-programmed cell death 1 (PD-1) monoclonal antibody developed by Akeso Biopharma, in collaboration with Chia Tai Tianqing (a subsidiary of SinoBiopharm), for the treatment of various cancers, including Hodgkin's lymphoma, nasopharyngeal cancer, non-small cell lung cancer (NSCLC) and solid tumours. Penpulimab is an immunoglobulin G1 monoclonal antibody engineered to completely eliminate Fcγ receptor binding and Fc-mediated effector functions that can compromise anti-tumour activity. In August 2021, penpulimab received its first approval in China for the treatment of adult patients with relapsed or refractory classic Hodgkin's lymphoma who have undergone at least second-line chemotherapy. Penpulimab is under regulatory review for nasopharyngeal cancer and NSCLC in China. Clinical studies of penpulimab are underway for various cancers in China and Australia. This article summarizes the milestones in the development of penpulimab leading to this first approval for relapsed or refractory classic Hodgkin's lymphoma.© Springer Nature Switzerland AG 2021
Superconducting Systems: Effective Solutions for the Modernization of Power Grids
Creators: F. Frentzas
M. Stemmle
R. Ryu
M. Ross
Publisher: name: IEEE
Year: 2018

2018 PES T&D Panel Presentation
Significant progress has been achieved in the development of power applications for high temperature superconducting (HTS) technologies, in particular power cables and fault current limiters. Several pilot projects for both applications have been energized, with several installations in constant operation for years. The technologies are now regularly evaluated as solution alternatives for many power system projects and challenges. In particular, the application of medium voltage HTS systems as replacement for conventional high voltage cable systems is often attractive, both technically and commercially. HTS cables provide increased power density with negligible thermal impact on the environment, resulting in solutions that are more compact than conventional cables, require smaller rights of way, simpler installation and ultimately reduced substation footprints. These features are especially valuable in congested urban areas where smaller ROWs and substations are extremely desirable. An overview of experience with existing installations and an outlook of upcoming projects are presented in these panel slides.
Wolf-Rayet Stars in M33 II: Optical Spectroscopy of emission-line stars in Giant Hii Regions
Creators: name: Drissen, L.
name: Crowther, P. A.
name: Ubeda, L.
name: Martin, P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present optical spectra of 14 emission-line stars in M33s giant HII regions NGC 592, NGC 595 and NGC 604: five of them are known WR stars, for which we present a better quality spectrogram, eight were WR candidates based on narrow-band imagery and one is a serendipitous discovery. Spectroscopy confirms the power of interference filter imagery to detect emission-line stars down to an equivalent width of about 5 A in crowded fields. We have also used archival HST/WFPC2 images to correctly identify emission-line stars in NGC 592 and NGC 588. emission-line stars in NGC 592 and NGC 588.
description: 9 pages, 14 figures, revised version submitted to MNRAS
SponGES Policy Brief: The social and cultural value of deep-sea sponges
Creators: name: FAO
Publisher: name: Zenodo
Year: 2021
Subjects: Sponges
Marine ecosystems
Use value
European Union (EU)
Horizon 2020
Grant Agreement No 679849
Deep-sea Sponge Grounds Ecosystems of the North Atlantic: an integrated approach towards their preservation and sustainable exploitation
SponGES

description: This SponGES policy brief highlights the importance of deep-sea sponges from a social and cultural standpoint.
2019 IEEE General Meeting Panel Presentation: Advances in Power System Studies for Geomagnetic Disturbance Vulnerability Assessment
Creators: R. Girgis
T.J. Overbye
A. Haddadi
K. Patil
Publisher: name: IEEE
Year: 2019

2019 IEEE General Meeting Panel Presentation: Advances in Power System Studies for Geomagnetic Disturbance Vulnerability Assessment
This product contains the following 4 presentations:
1. Presentation: Experience with Impact of GIC on Noise Performance of Large Power Transformers
2. Presentation: Assessment and Enhancement of Power System Voltage Stability During Geomagnetic Disturbances
3. Presentation: State-of-the-Art Tools and Guidelines for Compreshensive Analysis of Geomagnetic Disturbance Impacts
4. Presentation: New GMD Modeling Approaches in the PSS/E Program
Matched Slow Pulses Using Double Electromagnetically Induced Transparency
Creators: name: MacRae, Andrew
name: Campbell, Geoff
name: Lvovsky, A. I.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We implement double electromagnetically-induced transparency (double EIT) in rubidium vapor, using a tripod-shaped energy level scheme consisting of hyperfine and magnetic sublevels of the 5S1/2 to 5P1/2 transition. We show experimentally that through the use of double EIT one can control the contrast of transparency windows as well as group velocities of the two signal fields. In particular, the group velocities can be equalized, which holds promise to greatly enhance nonlinear optical interaction between these fields.
description: 3 pages, 5 figures. To be published Optics Letters Version 2: Expanded on phase-locking of lasers at different frequencies. Addressed the potential for optical switching. Changed figure 2 to include frequencies. Removed extraneous states. Added intuitive explanation of the system's dynamics. Added references [5] and [10]
Robust narrow-gap semiconducting behavior in square-net La$_{3}$Cd$_{2}$As$_{6}$
Creators: name: Piva, Mario M.
name: Rahn, Marein C.
name: Thomas, Sean M.
name: Scott, Brian L.
name: Pagliuso, Pascoal G.
name: Thompson, Joe D.
name: Schoop, Leslie M.
name: Ronning, Filip
name: Rosa, Priscila F. S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: ABSTRACT: Narrow-gap semiconductors are sought-after materials due to their potential for long-wavelength detectors, thermoelectrics, and more recently non-trivial topology. Here we report the synthesis and characterization of a new family of narrow-gap semiconductors, $R$$_{3}$Cd$_{2}$As$_{6}$ ($R=$ La, Ce). Single crystal x-ray diffraction at room temperature reveals that the As square nets distort and Cd vacancies order in a monoclinic superstructure. A putative charge-density ordered state sets in at 279~K in La$_{3}$Cd$_{2}$As$_{6}$ and at 136~K in Ce$_{3}$Cd$_{2}$As$_{6}$ and is accompanied by a substantial increase in the electrical resistivity in both compounds. The resistivity of the La member increases by thirteen orders of magnitude on cooling, which points to a remarkably clean semiconducting ground state. Our results suggest that light square net materials within a $I4/mmm$ parent structure are promising clean narrow-gap semiconductors.
Enhancing Smart Grid Resilience through Coordinated Transmission and Distribution Restoration
Creators: W. Sun
D. Ramasubramanian
R. Liu
A. Tbaileh
Y. Hou
Publisher: name: IEEE
Year: 2019

2019 PES ISGT NA Panel Session
Critical energy infrastructure has to operate against extreme events, like long-term climate change, natural hazards and disasters, cyber intrusion, etc. Fast recovery and successfully adapting to extreme events are critical to build a resilient power grid. The rapid development of smart grid technologies and the increasing penetration level of distributed energy resources (DER) provide opportunities to reevaluate the restoration process of transmission and distribution (T&D) systems, through appropriate modeling and simulation of T&D systems and their interactions. Traditionally, power system restoration studies simply treated distribution networks (DNs) as load injections into buses, without considering power flows or DER capabilities inside DNs. When performing the transmission restoration, the boundary substation buses are assumed not to be affected by the actual pick-up load capability of DNs. This assumption makes the restoration of bulk power system easier, but fails to reflect the actual operation of power systems and may cause inaccurate planning solutions. On the other hand, emerging smart grid technologies provide capabilities for deploying distribution management systems (DMS) and advanced communication infrastructures, which enables the capability of integrating T&D system restoration.
Magnetic resonance studies of atomic hydrogen gas at liquid helium temperatures
Creators: name: Whitehead, Lorne Arthur
Publisher: name: University of British Columbia
Year: 2010

description: Pulsed magnetic resonance studies are reported for a gas of hydrogen atoms at densities of 3-10¹³ X 10 cm⁻³ and temperatures of 4.2-77 K. The gas was produced by dissociation in a room temperature R.F. discharge, and piped through glass tubing into the cryogenic apparatus for study. The magnetic resonance transition observed is between the two lowest hyper-fine levels of the 1s atom in a magnetic field of 6481 Gauss where this splitting has its minimum value of about 765.5 MHZ. At 77 K, spin-exchange broadening of the resonance is observed. By varying the number density of hydrogen atoms, the ratio of spin-exchange broadening to atomic hydrogen density is obtained, and from this ratio the spin-exchange cross section for this transition is calculated. The cross section obtained is 60% of the theoretical value. At liquid helium temperatures, the spin-exchange cross section is shown to be at least 15 times smaller than that at liquid nitrogen temperatures, as. predicted by theory. He⁴ and H₂ buffer gases . are used to limit the diffusion broadening of the resonance, allowing the observation of small frequency shifts of the free induction signal. A model is proposed in which interactions of the hydrogen atoms with the flow tube walls cause these shifts. From the diffusion broadening of the resonance, the diffusion cross sections for H in He⁴ at 4.2 K and H in H₂ at 5-9 K are inferred to be 500 Å² and 250 Å² respectively.
Data Analytics for Grid Resilience Modeling and Enhancement
Creators: V. Vallem
A. Guzman
L. Roald
Y. Maximov
Publisher: name: IEEE
Year: 2019

2019 PES ISGT NA Panel Session
Recent extreme weather events have highlighted the importance and urgency of enhancing power grid resilience. Although resilience is generally recognized as the capability to anticipate, absorb, adapt to, and rapidly recover from disruptive events, there is not much consensus on the precise definition and quantitative measures for resilience. In this panel, we attempt to address resilience measures and modeling from a data analytics point of view. It will include a discussion on the fundamentals and some key ingredients in grid resilience by bringing perspectives from academia, research labs, industry, and governmental agencies. We hope to help our audience take the first crack at answering the following questions: What does grid resilience mean exactly? What are the metrics to evaluate resilience? What are the resilience enhancement strategies and how optimization and data analytics can help?
Formation of Cylindrical Gravastars in Modified Gravity
Creators: name: Yousaf, Z.
name: Bamba, Kazuharu
name: Bhatti, M. Z.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper, we analyze a few physical characteristics of gravastar with cylindrical geometry in $f(R,T)$ theory, where $R$ is the Ricci scalar and $T$ is the trace of energy-momentum tensor. The gravastar is generally considered to be a substitute of a black hole with three different regions. In the present work, we examine the formulation of gravastar-like cylindrical structures in $f(R,T)$ theory. By using Darmois and Israel matching conditions, we formulate a mass function of a thin shell. We calculate the different physical characteristics of gravastar, in particular, entropy within the thin shell, proper length of the intermediate thin shell as well as energy of the shell.
description: 16 pages, 4 figures, version accepted for publication in International Journal of Geometric Methods in Modern Physics
Improving Power System Reliability and Resilience through the Use of Enhanced Modeling and Advanced On-line Software Tools
Creators: M. Vaiman
A. Lee
S. Maslennikov
H. Zhang
R. Manuguid
N. Stenvig
P. Entingov
Publisher: name: IEEE
Year: 2019

2019 PES ISGT NA Panel Session
Maintaining reliable and resilient operation of the bulk power system is a fundamental aspect of grid operation, and focuses on ensuring the system can withstand sudden disturbances or unanticipated failures of system elements such that instability, uncontrolled separation, or cascading failures will not occur, and in case such events do occur, the system is able to quickly recover. The proposed panel session will feature presentations from four utilities (ERCOT, ISO New England, Peak Reliability, and San Diego Gas & Electric) describing their experience, lessons learned and future work on improving real-time models and advanced online applications that support their extensive efforts to enhance reliability and resilience of the grid in real-time and near real-time environments. The panel will also feature presenters from two National Labs, ORNL and PNNL, describing advanced technologies related to big data analytics (PNNL) and modeling efforts to support recovery work in Puerto Rico (ORNL).
Distribution System Hierarchical Load Modeling: Needs, Trends and Methodologies
Creators: R. Mather
Z. Wang
M. Konya
P. Mitra
Publisher: name: IEEE
Year: 2019

2019 PES ISGT NA Panel Session
With the emerging penetration of renewable/distributed sources and dynamic loads, the distribution systems are becoming more complex and unobservable in terms of modeling and analysis. Traditional models of substations, feeders and loads are no longer sufficient in performing accurate analysis. However, the incorporation of more instrumentations and data points such as smart meters and PMUs have enabled the acquisition of useful information to remodel the load under the distribution hierarchies from substation, feeder to microgrid and device level loads.
A Medical Pre-Diagnosis System for Histopathological Image of Breast Cancer
Creators: name: Fan, Shiyu
name: Xu, Runhai
name: Yan, Zhaohang
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: This paper constructs a novel intelligent medical diagnosis system, which can realize automatic communication and breast cancer pathological image recognition. This system contains two main parts, including a pre-training chatbot called M-Chatbot and an improved neural network model of EfficientNetV2-S named EfficientNetV2-SA, in which the activation function in top layers is replaced by ACON-C. Using information retrieval mechanism, M-Chatbot instructs patients to send breast pathological image to EfficientNetV2-SA network, and then the classifier trained by transfer learning will return the diagnosis results. We verify the performance of our chatbot and classification on the extrinsic metrics and BreaKHis dataset, respectively. The task completion rate of M-Chatbot reached 63.33\%. For the BreaKHis dataset, the highest accuracy of EfficientNetV2-SA network have achieved 84.71\%. All these experimental results illustrate that the proposed model can improve the accuracy performance of image recognition and our new intelligent medical diagnosis system is successful and efficient in providing automatic diagnosis of breast cancer.
Emergency Monitoring and Control through New Technologies and Analytics
Creators: M. Vallem
A. Guzman
L. Roald
Y. Maximov
Publisher: name: IEEE
Year: 2019

2019 PES ISGT NA Panel Session

As evidenced by recent occurrences such as Superstorm Sandy, Hurricane Katrina, the 2003 Northeast blackout, extreme events pose an enormous threat to the nation's electric grid and the socio-economic systems that depend on reliable delivery of power. Despite the economic costs and social hardships of such events, utilities are unable to adequately plan and prepare for them. Power systems are vulnerable to extreme contingencies (like an outage of a major generating substation or transmission line) that can cause significant generation and load loss and can lead to further cascading outages of other transmission facilities and generators in the system. These could put the power system into 'Alert' state which the operators restore into normal state with corrective controls. Generally, there is sufficient time to implement these actions. However, the possibility of further contingencies as well as collapse conditions can push the system into an emergency state. The operators need to take less common and faster control actions (like customer power disruptions) to protect the system from further collapse.

Prevention of possible power system collapse scenarios needs both long-term planning and operational intelligence that can identify optimal emergency controls to ensure that the system can be operated both reliably and economically. This panel will cover implementation of emergency controls using Dynamic Contingency Analysis Tool (DCAT): DCAT provides a hybrid dynamic/steady-state approach to analyzing cascading outages resulting from extreme contingencies; modal analysis for inter-area oscillation detection in real time; and detecting and mitigating imminent voltage collapse using steady-state optimization.
Sagnac interference in Carbon nanotubes
Creators: name: Bishara, Waheb
name: Refael, Gil
name: Bockrath, Marc
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The Sagnac interference mode arises when two interfering counterpropogating beams traverse a loop, but with their velocities detuned by a small amount $2u$, with $v_{R/L}=v_F\pm u$. In this paper we perform a perturbative non-equilibrium calculation of Sagnac interference in single channel wires as well as armchair nanotube loops. We study the dependence of the Sagnac conductance oscillations on temperature and interactions. We find that the Sagnac interference is not destroyed by strong interactions, but becomes weakly dependent on the velocity detuning $u$. In armchairs nanotubes with typical interaction strength, $0.25 \leq g \leq 0.5$, we find that the necessary temperature for observing the interference effect, $T_{SAG}$ is also only weakly dependent on the interaction, and is enhanced by a factor of 8 relative to the temperature necessary for observing Fabry-Perot interference in the same system, $T_{FP}$.
description: 12 pages, 8 figures
Integration of Distributed Energy Resources in Retail Markets
Creators: A.M. Annaswami
Publisher: name: IEEE
Year: 2019

2019 PES ISGT NA Panel Session
This panel will discuss some of the emerging ideas in the participation of retail customers and distributed generation with the power system at large. Dr. Anuradha Annaswamy (moderator) from MIT speak to advances in dynamic market mechanisms that allow for better integration of distributed resources. Henry Yoshimura from ISO-NE will present on the newly implemented Price-Responsive Demand Program which improves the participation and compensation mechanisms for demand resources in wholesale markets. He will highlight the types of demand resources and aggregations that are challenging or too costly for an ISO to handle in the wholesale market and the limitations of a wholesale-only market environment. Toby Hyde who works in the National Grid 'utility of the future' regulatory strategy team will provide a Utility perspective. He's been deeply involved with NY REV (Value of DER, net energy metering reform, Distribution System Platform efforts) as well as the next generation thinking and analysis on dynamic pricing in the context of their business cases for Advanced Metering Infrastructure (AMI) investment in NY and RI. Finally, Ian Schneider, from MIT's Institute for Data, Systems and Society (IDSS), will capture an academic perspective on tariff deign, incentives and the value of distributed resources.
Learning to schedule job-shop problems: Representation and policy learning using graph neural network and reinforcement learning
Creators: name: Park, Junyoung
name: Chun, Jaehyeong
name: Kim, Sang Hun
name: Kim, Youngkook
name: Park, Jinkyoo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Multiagent Systems (cs.MA)
subject: FOS: Computer and information sciences

description: We propose a framework to learn to schedule a job-shop problem (JSSP) using a graph neural network (GNN) and reinforcement learning (RL). We formulate the scheduling process of JSSP as a sequential decision-making problem with graph representation of the state to consider the structure of JSSP. In solving the formulated problem, the proposed framework employs a GNN to learn that node features that embed the spatial structure of the JSSP represented as a graph (representation learning) and derive the optimum scheduling policy that maps the embedded node features to the best scheduling action (policy learning). We employ Proximal Policy Optimization (PPO) based RL strategy to train these two modules in an end-to-end fashion. We empirically demonstrate that the GNN scheduler, due to its superb generalization capability, outperforms practically favored dispatching rules and RL-based schedulers on various benchmark JSSP. We also confirmed that the proposed framework learns a transferable scheduling policy that can be employed to schedule a completely new JSSP (in terms of size and parameters) without further training.
description: 16 pages, 8 figures
The 85$Rb(p,n)85Sr reaction and the modified proton optical potential
Creators: name: Kiss, G. G.
name: Gyürky, Gy.
name: Simon, A.
name: Fülöp, Zs.
name: Somorjai, E.
name: Rauscher, T.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The cross sections of the astrophysically relevant 85$Rb(p,n)85Srg,m reaction have been measured between Ec.m. = 2.16 and 3.96 MeV. The cross sections have been derived by measuring the gamma radiation following the beta decay of the reaction products. A comparison with the predictions of Hauser-Feshbach calculations using the NON-SMOKER code confirms a recently derived modification of the global optical proton potential.
description: CGS XIII conference
Calibration and Performance of the REgolith X-Ray Imaging Spectrometer (REXIS) Aboard NASA's OSIRIS-REx Mission to Bennu
Creators: name: Hong, Jaesub
name: Binzel, Richard P.
name: Allen, Branden
name: Guevel, David
name: Grindlay, Jonathan
name: Hoak, Daniel
name: Masterson, Rebecca
name: Chodas, Mark
name: Lambert, Madeline
name: Thayer, Carolyn
name: Bokhour, Ed
name: Biswas, Pronoy
name: Mendenhall, Jeffrey A.
name: Ryu, Kevin
name: Kelly, James
name: Warner, Keith
name: Lim, Lucy F.
name: Bartels, Arlin
name: Lauretta, Dante S.
name: Boynton, William V.
name: Enos, Heather L.
name: Harshman, Karl
name: Balram-Knutson, Sara S.
name: Polit, Anjani T.
name: McCoy, Timothy J.
name: Clark, Benton C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The REgolith X-ray Imaging Spectrometer (REXIS) instrument on board NASA's OSIRIS-REx mission to the asteroid Bennu is a Class-D student collaboration experiment designed to detect fluoresced X-rays from the asteroid's surface to measure elemental abundances. In July and November 2019 REXIS collected ~615 hours of integrated exposure time of Bennu's sun-illuminated surface from terminator orbits. As reported in Hoak et al. (2021), the REXIS data do not contain a clear signal of X-ray fluorescence from the asteroid, in part due to the low incident solar X-ray flux during periods of observation. To support the evaluation of the upper limits on the detectable X-ray signal that may provide insights for the properties of Bennu's regolith, we present an overview of the REXIS instrument, its operation, and details of its in-flight calibration on astrophysical X-ray sources. This calibration includes the serendipitous detection of the transient X-ray binary MAXI J0637-430 during Bennu observations, demonstrating the operational success of REXIS at the asteroid. We convey some lessons learned for future X-ray spectroscopy imaging investigations of asteroid surfaces.
description: 36 pages, 18 figures, accepted for publication in Space Science Reviews
AGB Connection and Ultraviolet Luminosity Excess in Elliptical Galaxies
Creators: name: Buzzoni, Alberto
name: Gonzalez-Lopezlira, Rosa A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Relying on infrared surface brightness fluctuactions to trace AGB properties in a sample of elliptical galaxies in the Virgo and Fornax clusters, we assess the puzzling origin of the "UV-upturn" phenomenon, recently traced down to the presence of a hot horizontal branch stellar component. We find that the UV-upturn actually signals a profound change in the c-m diagram of stellar populations in elliptical galaxies, involving both the hot stellar component and red-giant evolution.
description: 13 pages & 13 figures -- To appear in the Astrophysical Journal (Sep '08 issue). Further info on SBF models at http://www.bo.astro.it/~eps/home.html
Technology Solutions for An Evolving Energy Industry
Creators: E. Schweitzer
M. Huang
A. Ipakchi
D. Novosel
M. Vadari
Publisher: name: IEEE
Year: 2019

2019 PES ISGT NA Panel Session
The business of energy never stands still. Changes in technology, market demand, and regulations require today's utilities to constantly innovate, adapt and evolve. This plenary session covers the state of the art in the technology solutions and the future innovative solutions needed to capture the benefits and mitigate the challenges associated with the evolving energy industry. The technology solutions covered include but not limited to: ? Advanced Protection and Control - DERMS (DER Management Systems) - Smart Grid Communications - IOT (Internet of Things) - Microgrid Management Systems - Block Chain - Data Analytics - Situational Awareness
Microwave dielectric measurements on MEM(TCNQ)₂ and TTF-TCNQ
Creators: name: Morrow, Michael Robert
Publisher: name: University of British Columbia
Year: 2010

description: The microwave dielectric constant and conductivity of MEM(TCNQ)₂ were studied in the neighbourhood of the monomer to dimer transition at 61°C using cavity-perturbation techniques at 9 GHz. The conductivity was found to be in general agreement with four-probe d.c. results. Thus, doubts about the reliability of the d.c. measurements above the destructive transition have been removed. The complex dielectric constant of TTF-TCNQ at liquid helium temperatures was studied using dielectric resonance techniques. Some anomalies regarding the interpretation of the dielectric resonance mode plots were resolved. Values for Є’ of (3.0±0.4)X10³ and for Є’of greater than 9 were implied by the results. Finally, preliminary results and proposed directions for a bolometric absorption measurement in TTF-TCNQ in the microwave bands are presented. This technique may prove useful for the direct observation of the pinned charge density wave in TTF-TCNQ.
A Twisted Kink Crystal in the Chiral Gross-Neveu model
Creators: name: Basar, Gokce
name: Dunne, Gerald V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Superconductivity (cond-mat.supr-con)
subject: High Energy Physics - Lattice (hep-lat)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We present the detailed properties of a self-consistent crystalline chiral condensate in the massless chiral Gross-Neveu model. We show that a suitable ansatz for the Gorkov resolvent reduces the functional gap equation, for the inhomogeneous condensate, to a nonlinear Schrödinger equation, which is exactly soluble. The general crystalline solution includes as special cases all previously known real and complex condensate solutions to the gap equation. Furthermore, the associated Bogoliubov-de Gennes equation is also soluble with this inhomogeneous chiral condensate, and the exact spectral properties are derived. We find an all-orders expansion of the Ginzburg-Landau effective Lagrangian and show how the gap equation is solved order-by-order.
description: 28 pages, 13 figs; v2: new appendix on Eilenberger eq and refs; version in PRD
Advanced Distribution Management Systems Research and Development in the U.S. DOE
Creators: R. Melton
M. Baggu
L. Min
D. Arnold
S. Misra
Publisher: name: IEEE
Year: 2019

2019 PES ISGT NA Panel Session
This panel will present updates on the U.S. DOE Advanced Distribution Management System Program. This program consists of five projects addressing different aspects of ADMS. The panel will include presentations by the leaders of each project with time for discussion of the collective set of projects and the DOE ADMS program. The projects include: Creation of an open platform for development of advanced distribution system planning and operations applications; an ADMS hardware testbed; demonstration of an advanced distribution system operations tool; creation of a framework for integrating information between EMS, DMS and BMS, and design of advanced control algorithms.
Testing the magnetic flux paradigm for AGN radio loudness with a radio intermediate quasar
Creators: name: Chamani, Wara
name: Savolainen, Tuomas
name: Hada, Kazuhiro
name: Xu, Ming H.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: For understanding the diversity of jetted active galactic nuclei (AGN) and especially the puzzling wide range in their radio-loudness, it is important to understand what role the magnetic fields play in setting the power of relativistic jets in AGN. We have performed multi-frequency (4-24 GHz) VLBA phase-referencing observations of the radio-intermediate quasar III Zw 2 using three nearby calibrators as reference sources to estimate jet magnetic flux by measuring the core-shift effect. By combining the self-referencing core-shift of each calibrator with the phase-referencing core-shifts, we obtained an upper limit of 0.16 mas for the core-shift between 4 and 24 GHz in III Zw 2. By assuming equipartition between magnetic and particle energy densities and adopting the flux-freezing approximation, we further estimated the upper limit for both magnetic field strength and poloidal magnetic flux threading the black hole. We find that the upper limit to the measured magnetic flux is smaller by at least a factor of five compared to the value predicted by the magnetically arrested disk (MAD) model. An alternative way to derive the jet magnetic field strength from the turnover of the synchrotron spectrum leads to an even smaller upper limit. Hence, the central engine of III Zw 2 has not reached the MAD state, which could explain why it has failed to develop a powerful jet, even though the source harbours a fast-spinning black hole. However, it generates an intermittent jet, which is possibly triggered by small scale magnetic field fluctuations as predicted by the magnetic flux paradigm of Sikora & Begelman (2013). We propose here that combining black hole spin measurements with magnetic field measurements from the VLBI core-shift observations of AGN over a range of jet powers could provide a strong test for the dominant factor setting the jet power relative to the accretion power available.
description: 29 pages, 22 figures, 3 Tables, accepted for publication with A&A
title: Πρόβλεψη απώλειας πελατών με χρήση νευρωνικών δικτύων
title: Customer churn prediction using neural nets
Creators: name: Κοντοπανος Εμμανουηλ
Publisher: name: Technical University of Crete
Year: 2023

description: Η απώλεια πελατών (customer churn) αντιπροσωπεύει ένα από τα κυριότερα προβλήματα που καλούνται να αντιμετωπίσουν οι επιχειρήσεις. Η παρούσα διπλωματική εργασία επικεντρώνεται στην εφαρμογή νευρωνικών δικτύων για την ανάπτυξη ενός μοντέλου πρόβλεψης πιθανής απώλειας πελατών (customer churn prediction), χρησιμοποιώντας μια συλλογή δεδομένων από την Kaggle. Η ανάλυση των δεδομένων πραγματοποιείται με τη χρήση του λογισμικού Orange Data Mining, μιας βιβλιοθήκης αλγορίθμων μηχανικής μάθησης που βασίζεται στη γλώσσα Python.Η αξιολόγηση της απόδοσης του μοντέλου διενεργείται με διάφορους συνδυασμούς υπερπαραμέτρων. Εξαιτίας της ανισορροπίας στην κατανομή των κλάσεων (imbalanced class) λόγω του μικρού αριθμού αποχωρούντων πελατών, προβαίνουμε σε τροποποιήσεις στη βάση δεδομένων με χρήση feature engineering μεθόδων, όπως το one-hot encoding και το MinMaxScaler. Περαιτέρω, χρησιμοποιούμε τεχνικές όπως το Random Oversampling, το Random Undersampling, το SMOTE και το SMOTE-ENN, παράγοντας βάσεις δεδομένων με διαφορετικές προσεγγίσεις.Η τελική επίδοση του μοντέλου εξελίσσεται σημαντικά με τη χρήση της τεχνικής SMOTE-ENN, επιτυγχάνοντας τιμές AUC ίσες με 0.963.
On the mean density of complex eigenvalues for an ensemble of random matrices with prescribed singular values
Creators: name: Wei, Yi
name: Fyodorov, Yan V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Given any fixed $N \times N$ positive semi-definite diagonal matrix $G\ge 0$ we derive the explicit formula for the density of complex eigenvalues for random matrices $A$ of the form $A=U\sqrt{G}$} where the random unitary matrices $U$ are distributed on the group $\mathrm{U(N)}$ according to the Haar measure.
description: 10 pages, 1 figure
XAI Methods for Neural Time Series Classification: A Brief Review
Creators: name: Šimić, Ilija
name: Sabol, Vedran
name: Veas, Eduardo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Deep learning models have recently demonstrated remarkable results in a variety of tasks, which is why they are being increasingly applied in high-stake domains, such as industry, medicine, and finance. Considering that automatic predictions in these domains might have a substantial impact on the well-being of a person, as well as considerable financial and legal consequences to an individual or a company, all actions and decisions that result from applying these models have to be accountable. Given that a substantial amount of data that is collected in high-stake domains are in the form of time series, in this paper we examine the current state of eXplainable AI (XAI) methods with a focus on approaches for opening up deep learning black boxes for the task of time series classification. Finally, our contribution also aims at deriving promising directions for future work, to advance XAI for deep learning on time series data.
description: 8 pages, 0 figures, Accepted as a poster presentation
Artificial Intelligence in Power System Operations and Planning
Creators: Z. Wang
A. Santos
D. Deka
Publisher: name: IEEE
Year: 2019

2019 PES ISGT NA Panel Session
Artificial intelligence (AI) has had significant developments in the past decade, especially in machine learning (ML), and has been applied to many industries, including the energy sector. AI applications in power systems is not a new topic, dating back in early 1950s. However, this new wave of AI applications in power systems is making much more significant impacts, thanks to the recent advancements of machine learning. This panel will discuss how the recentadvancement in AI, especially in machine learning, can help the operations and planning in power systems. The panel will discuss how AI can be used to help a number of fundamental optimization problems in power system operations and planning. For example, the panel will cover topics on how AI/ML can be used to help solve operational problems (e.g., unit commitment) faster; how AI/ML can be used to solve power flows better; and how AI/ML can help state estimation and other parameter estimation.