cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Addressing Wind and Solar Uncertainty in Grid Operation
Creators: G. B. Alderete
E. Ela
Publisher: name: IEEE
Year: 2022

Wind and Solar resources are mostly intermittent and not quite dispatchabe. As more and more wind and solar being integrated to the system, they impose challenge in grid operation, in terms of power balance and constraint control. This panel will bring practitioners from grid operators around the world to share current practices and challenges, as well as researchers to present new methods to model these uncertainties and assess their impact to the grid.
Wind and Solar resources are mostly intermittent and not quite dispatchabe. As more and more wind and solar being integrated to the system, they impose challenge in grid operation, in terms of power balance and constraint control. This panel will bring practitioners from grid operators around the world to share current practices and challenges, as well as researchers to present new methods to model these uncertainties and assess their impact to the grid.
Impact of Power Electronics on Electrical Infrastructure - Bulk System Operations
Creators: N. Modi
P. Bixel
Publisher: name: IEEE
Year: 2022

The power system is rapidly evolving with large amount of power electronic converters becoming pervasive through the electrical infrastructure. The role inverter based resources (IBRs) on the generation side is increasing rapidly. The grid edge is changing rapidly with power electronics already widespread in low voltage applications. With IBRs getting connected at the transmission and sub-transmission level, the role of power electronics in the bulk power system is poised take off. The industry is beginning to focus greater attention on the challenges of grid operation with high levels of inverter based resources and the role of IBRs on the reliability and operational performance of the bulk power system. With increasing global commitment for deeper decarbonization of the electric power system, maintaining the stability and reliability of the bulk power system would become more  complex. Reliability implications of IBR dominated power system are not fully analyzed. Ensuring the stability of the bulk grid require a greater understanding of failure modes, how to mitigate system-level failures, system operations and associated infrastructure challenges. This panel with speakers from utilities, manufacturers and manufacturers will discuss the impact power electronics on the bulk system operation.
The power system is rapidly evolving with large amount of power electronic converters becoming pervasive through the electrical infrastructure. The role inverter based resources (IBRs) on the generation side is increasing rapidly. The grid edge is changing rapidly with power electronics already widespread in low voltage applications. With IBRs getting connected at the transmission and sub-transmission level, the role of power electronics in the bulk power system is poised take off. The industry is beginning to focus greater attention on the challenges of grid operation with high levels of inverter based resources and the role of IBRs on the reliability and operational performance of the bulk power system. With increasing global commitment for deeper decarbonization of the electric power system, maintaining the stability and reliability of the bulk power system would become more  complex. Reliability implications of IBR dominated power system are not fully analyzed. Ensuring the stability of the bulk grid require a greater understanding of failure modes, how to mitigate system-level failures, system operations and associated infrastructure challenges. This panel with speakers from utilities, manufacturers and manufacturers will discuss the impact power electronics on the bulk system operation.
title: Teoria, práticas e investigação em intervenção precoce II
Creators: name: Fuertes, Marina
name: Nunes, Clarisse
name: Rosa, João
name: Almeida, Ana Rita
name: Esteves, Sandrina
Publisher: name: Escola Superior de Educação, Instituto Politécnico de Lisboa
Year: 2021

description: O mestrado de Intervenção Precoce da Escola Superior de Educação (ESELx) do Instituto Politécnico de Lisboa apresenta o seu terceiro ebook. Este livro pretende ser uma janela aberta para as dissertações de mestrado e para a investigação desenvolvida pelos seus estudantes no seio dessas teses. Estes trabalhos empíricos são enquadrados por dois artigos de revisão redigidos por convidados que ajudam a traçar o mapa conceptual da prática na intervenção precoce.
National Energy Policies and Strategies in Different Countries
Creators: D. Sharafi
S. Soonee
A. Saxena
S. Mukhopadhyay
F. Teotia
J. McConnach
L. Lai
E. Feldhoff
Publisher: name: IEEE
Year: 2022

The panel will discuss different energy policies in which different governmental entities addressing issues of energy development including energy conversion, distribution and use. The attributes of energy policy may include legislation, international treaties, incentives to investment, guidelines for energy conservation, taxation and other public policy techniques. Energy is a core component of modern economies. A functioning economy requires not only labour and capital but also energy, for manufacturing processes, transportation, communication and agriculture.
The panel will discuss different energy policies in which different governmental entities addressing issues of energy development including energy conversion, distribution and use. The attributes of energy policy may include legislation, international treaties, incentives to investment, guidelines for energy conservation, taxation and other public policy techniques. Energy is a core component of modern economies. A functioning economy requires not only labour and capital but also energy, for manufacturing processes, transportation, communication and agriculture.
Evolution of Labour Supply in Ridesourcing
Creators: name: de Ruijter, Arjan
name: Cats, Oded
name: Kucharski, Rafal
name: van Lint, Hans
Publisher: name: arXiv
Year: 2021
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: Contrary to traditional transit services, supply in ridesourcing systems emerges from individual labour decisions of gig workers. The effect of decentralisation in supply on the evolution of on-demand transit services is largely unknown. To this end, we propose a dynamic model comprising of the subsequent supply-side processes: (i) initial exposure to information about the platform, (ii) a long-term registration decision, and (iii) daily participation decisions, subject to day-to-day learning based on within-day matching outcomes. We construct a series of experiments to study the effect of supply market properties and pricing strategies. We find that labour supply in ridesourcing may be non-linear and undergo several transitions, inducing significant variations in income levels and level of service over time. Our results provide indications that the ridesourcing market may benefit from a cap in supply and regulation of the commission fee.
description: 33 pages, 11 figures, Replacement of version submitted to Transportmetrica B: Transport Dynamics (2022) prior to revisions
Technical, economic and social challenges and potential solutions in designing and operating viable microgrid systems
Creators: M. Negnevitsky
F. Ding
Publisher: name: IEEE
Year: 2022

The objective of this panel is to present the current state-of-the art in designing and operating microgrid systems and discuss technical, economic and social challenges that are being encountered. The panel will discuss issues related to control strategies, protection, islanding operation as well as microgrid standards and regulatory barriers. Examples of practical installations worldwide will be presented.
The objective of this panel is to present the current state-of-the art in designing and operating microgrid systems and discuss technical, economic and social challenges that are being encountered. The panel will discuss issues related to control strategies, protection, islanding operation as well as microgrid standards and regulatory barriers. Examples of practical installations worldwide will be presented.
Adaptive thresholds for neural networks with synaptic noise
Creators: name: Bolle, D.
name: Heylen, R.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The inclusion of a macroscopic adaptive threshold is studied for the retrieval dynamics of both layered feedforward and fully connected neural network models with synaptic noise. These two types of architectures require a different method to be solved numerically. In both cases it is shown that, if the threshold is chosen appropriately as a function of the cross-talk noise and of the activity of the stored patterns, adapting itself automatically in the course of the recall process, an autonomous functioning of the network is guaranteed. This self-control mechanism considerably improves the quality of retrieval, in particular the storage capacity, the basins of attraction and the mutual information content.
description: 12 pages, 10 figures
A lower-than-expected saltation threshold at Martian pressure and below
Creators: name: Andreotti, B.
name: Claudin, P.
name: Iversen, J. J.
name: Merrison, J. P.
name: Rasmussen, K. R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Geophysics (physics.geo-ph)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Aeolian sediment transport is observed to occur on Mars as well as other extraterrestrial environments, generating ripples and dunes as on Earth. The search for terrestrial analogues of planetary bedforms, as well as environmental simulation experiments able to reproduce their formation in planetary conditions, are powerful ways to question our understanding of geomorphological processes towards unusual environmental conditions. Here, we perform sediment transport laboratory experiments in a closed-circuit wind tunnel placed in a vacuum chamber and operated at extremely low pressures to show that Martian conditions belong to a previously unexplored saltation regime. The threshold wind speed required to initiate saltation is only quantitatively predicted by state-of-the art models up to a density ratio between grain and air of $4 \times 10^5$, but unexpectedly falls to much lower values for higher density ratios. In contrast, impact ripples, whose emergence is continuously observed on the granular bed over the whole pressure range investigated, display a characteristic wavelength and propagation velocity essentially independent of pressure. A comparison of these findings with existing models suggests that sediment transport at low Reynolds number but high grain-to-fluid density ratio may be dominated by collective effects associated with grain inertia in the granular collisional layer.
description: 38 pages, 21 figures
Noncommutative Black Holes, The Final Appeal To Quantum Gravity: A Review
Creators: name: Nicolini, Piero
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present the state of the art regarding the relation between the physics of Quantum Black Holes and Noncommutative Geometry. We start with a review of models proposed in the literature for describing deformations of General Relativity in the presence of noncommutativity, seen as an effective theory of Quantum Gravity. We study the resulting metrics, proposed to replace or at least to improve the conventional black hole solutions of Einstein's equation. In particular, we analyze noncommutative-inspired solutions obtained in terms of quasi-classical noncommutative coordinates: indeed because of their surprising new features, these solutions enable us to circumvent long standing problems with Quantum Field Theory in Curved Space and to cure the singular behavior of gravity at the centers of black holes. As a consequence, for the first time, we get a complete description of what we may call the black hole SCRAM, the shut down of the emission of thermal radiation from the black hole: in place of the conventional scenario of runaway evaporation in the Planck phase, we find a zero temperature final state, a stable black hole remnant, whose size and mass are determined uniquely in terms of the noncommutative parameter $θ$. This result turns out to be of vital importance for the physics of the forthcoming experiments at the LHC, where mini black hole production is foreseen in extreme energy hadron collisions. Because of this, we devote the final part of this review to higher dimensional solutions and their phenomenological implications for TeV Gravity.
description: 77 pages, 35 figures, 5 tables, invited contribution; updated version with enlarged reference list, in press on Int. J. of Mod. Phys. A
On the blow-up threshold for weakly coupled nonlinear Schroedinger equations
Creators: name: Fanelli, Luca
name: Montefusco, Eugenio
Publisher: name: arXiv
Year: 2007
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 35Q55, 35Q60

description: We study the Cauchy problem for a system of two coupled nonlinear focusing Schroedinger equations arising in nonlinear optics. We discuss when the solutions are global in time or blow-up in finite time. Some results, in dependence of the data of the problem, are proved; in particular we give a bound, depending on the coupling parameter, for the blow-up threshold.
description: 14 pages
Post-clearcutting forest floor nitrogen dynamics and regeneration response in the Coastal Western Hemlock wet subzone
Creators: name: Martin, Wayne Lloyd
Publisher: name: University of British Columbia
Year: 2010

description: The objective of this study was to describe the dynamics of post-clearcutting forest floor N on mesic sites in the wet subzone of the Coastal Western Hemlock biogeoclimatic zone. Post-clearcutting release of N was examined by measuring the following parameters for a chronosequence of five sites ranging in age from an old-growth forest to a 26-yr-old stand: forest floor N capital; rate of in situ mineralization of forest floor; rate of decomposition of cellulose; concentrations of inorganic-N and total-N in soil solution; and adsorption of inorganic-N by ion exchange resin bags. Effects of the post-clearcutting release of N on tree growth were assessed by measuring foliar N levels and height growth of Abies amabilis (Dougl.) Forbes advanced regeneration. The following sinks for the mineralized forest floor N were investigated: accumulation in plant biomass; solution transfer of inorganic-N and total-N from the forest floor to storage in the upper mineral soil. Based on the difference between the old-growth and the 6- year-old forest floor N capitals, post-clearcutting mobilization of forest floor N was estimated to be 950 kg.N.ha⁻¹ . Although not significant (P=.05), rates of cellulose decomposition were about 3 times higher in the young clearcuts than in the old-growth stand. Indicators of N availability, including in situ rates of mineralization, soil water concentrations and ion exchange resin bags, revealed higher levels of nitrate in the forest floor and/or mineral soil in the 3- and 6-year-old clearcuts than in the other sites. Nitrate concentrations declined to pre-clearcut levels by 8-10 years after clearcutting. %N and N content of current needles, and 1983 height increment of amabilis fir regeneration reflected the pattern of N availability. Of the observed change in forest floor N (kg.N.ha⁻¹ ) over the 10 year post-clearcutting period, plant biomass accumulation accounted for 105 and solution transfer from the forest floor for 187. Together, this amounts to 1/3 of the observed decline of 950 kg.N.ha⁻¹ Potential rates of denitrification in the 5- and 12-year-old clearcut forest floors were 2-5 times greater than in the old-growth stand. The potential rates were sufficiently high to provide a plausible explanation for the post-clearcutting decline in forest floor N.
A very early origin of isotopically distinct nitrogen in inner Solar System protoplanets
Creators: name: Grewal, Damanveer S.
name: Dasgupta, Rajdeep
name: Marty, Bernard
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: Understanding the origin of life-essential volatiles like N in the Solar System and beyond is critical to evaluate the potential habitability of rocky planets. Whether the inner Solar System planets accreted these volatiles from their inception or had an exogenous delivery from the outer Solar System is, however, not well understood. Using previously published data of nucleosynthetic anomalies of Ni, Mo, W and Ru in iron meteorites along with their 15N-14N ratios, here we show that the earliest formed protoplanets in the inner and outer protoplanetary disk accreted isotopically distinct N. While the Sun and Jupiter captured N from nebular gas, concomitantly growing protoplanets in the inner and outer disk possibly sourced their N from organics and/or dust - with each reservoir having a different N isotopic composition. A distinct N isotopic signature of the inner Solar System protoplanets coupled with their rapid accretion suggests that non-nebular, isotopically processed N was ubiquitous in their growth zone at 0-0.3 Myr after the formation of CAIs. Because 15N-14N ratio of the bulk silicate Earth falls between that of inner and outer Solar System reservoirs, we infer that N in the present-day rocky planets represents a mixture of both inner and outer Solar System material.
description: 29 pgaes, 4 figures, 3 extended data figures
How to Find More Supernovae with Less Work: Object Classification Techniques for Difference Imaging
Creators: name: Bailey, S.
name: Aragon, C.
name: Romano, R.
name: Thomas, R. C.
name: Weaver, B. A.
name: Wong, D.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the results of applying new object classification techniques to difference images in the context of the Nearby Supernova Factory supernova search. Most current supernova searches subtract reference images from new images, identify objects in these difference images, and apply simple threshold cuts on parameters such as statistical significance, shape, and motion to reject objects such as cosmic rays, asteroids, and subtraction artifacts. Although most static objects subtract cleanly, even a very low false positive detection rate can lead to hundreds of non-supernova candidates which must be vetted by human inspection before triggering additional followup. In comparison to simple threshold cuts, more sophisticated methods such as Boosted Decision Trees, Random Forests, and Support Vector Machines provide dramatically better object discrimination. At the Nearby Supernova Factory, we reduced the number of non-supernova candidates by a factor of 10 while increasing our supernova identification efficiency. Methods such as these will be crucial for maintaining a reasonable false positive rate in the automated transient alert pipelines of upcoming projects such as PanSTARRS and LSST.
description: 25 pages; 6 figures; submitted to ApJ
DH Type II Radio Bursts During Solar Cycles 23 and 24: Frequency-dependent Classification and their Flare-CME Associations
Creators: name: Patel, Binal D.
name: Joshi, Bhuwan
name: Cho, Kyung-Suk
name: Kim, Rok-Soon
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present the characteristics of DH type II bursts for the Solar Cycles 23 and 24. The bursts are classified according to their end frequencies into three categories, i.e. Low Frequency Group (LFG; 20 kHz $\leq$ $f$ $\leq$ 200 kHz), Medium Frequency Group (MFG; 200 kHz $
description: 33 pages, 20 Figures. Accepted in Solar Physics
Sub-Shot-Noise Magnetometry with a Correlated Spin-Relaxation Dominated Alkali-Metal Vapor
Creators: name: Kominis, I. K.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Spin noise sets fundamental limits to the precision of measurements using spin-polarized atomic vapors, such as performed with sensitive atomic magnetometers. Spin squeezing offers the possibility to extend the measurement precision beyond the standard quantum limit of uncorrelated atoms. Contrary to the current understanding, we show that even in the presence of spin relaxation, spin squeezing can lead to a significant reduction of spin noise, and hence an increase in magnetometric sensitivity, for a long measurement time. This is the case when correlated spin relaxation due to binary alkali-atom collisions dominates independently acting decoherence processes.
description: 4 pages, submitted to Phys. Rev. Lett
final report (ASRS).pdf
Creators: name: Fathy, Ahmed
Publisher: name: figshare
Year: 2021
Subjects: subject: 91303 Autonomous Vehicles
subject: FOS: Mechanical engineering
subject: 90603 Industrial Electronics
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: Mechanical Engineering

description: The desired needs of the project are to move between the aisles in a pre-specified way that will be designed through the control unit and the sensors and to stop in the desired location to grab the products from the surrounding shelves and to hold them over a plate to another location and these processes will realize the benefits of the ASRS system.Our final conceptual design will consist of the driving vehicle which composed of the V-slots, the batteries, the control unit which will be in our design the Arduino, the driving motors, and will carry a mechanism which will compose of two vertical V-slots, vertical power screw loaded by a nut carrying a plate which will be loaded by the gripper motors loaded on a horizontal power screw by means of nuts and there will enough space on the plate that a pre-specified number of products will be placed in it.
Addressing Variable Energy Resource Generation in Standard 762
Creators: D. Logan
C. Dent
L. Thaubald
Publisher: name: IEEE
Year: 2022

A revision of IEEE Standard 762 Standard Definitions for Use in Reporting Electric Generating Unit Reliability, Availability, and Productivity is underway. The revision will extend the standard to cover variable energy resource (VER) generators, such as wind and solar. Key changes to address VER generators include: definition of the concept of resource availability; a distinction between indices used for (a) system reliability analysis and (b) equipment availability monitoring; definition of critical period and critical period indices; and redefinition of some VER indices in terms of generation rather than time. The panel session will provide an overview of the changes, their background, and their implications, and invite discussion from the audience of the proposals and their relevance to the industry.
A revision of IEEE Standard 762 Standard Definitions for Use in Reporting Electric Generating Unit Reliability, Availability, and Productivity is underway. The revision will extend the standard to cover variable energy resource (VER) generators, such as wind and solar. Key changes to address VER generators include: definition of the concept of resource availability; a distinction between indices used for (a) system reliability analysis and (b) equipment availability monitoring; definition of critical period and critical period indices; and redefinition of some VER indices in terms of generation rather than time. The panel session will provide an overview of the changes, their background, and their implications, and invite discussion from the audience of the proposals and their relevance to the industry.
Profiling the Cybercriminal: A Systematic Review of Research
Creators: name: Bada, Maria
name: Nurse, Jason R. C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computers and Society (cs.CY)
subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: As cybercrime becomes one of the most significant threats facing society today, it is of utmost importance to better understand the perpetrators behind such attacks. In this article, we seek to advance research and practitioner understanding of the cybercriminal (cyber-offender) profiling domain by conducting a rigorous systematic review. This work investigates the aforementioned domain to answer the question: what is the state-of-the-art in the academic field of understanding, characterising and profiling cybercriminals. Through the application of the PRISMA systematic literature review technique, we identify 39 works from the last 14 years (2006-2020). Our findings demonstrate that overall, there is lack of a common definition of profiling for cyber-offenders. The review found that one of the primary types of cybercriminals that studies have focused on is hackers and the majority of papers used the deductive approach as a preferred one. This article produces an up-to-date characterisation of the field and also defines open issues deserving of further attention such as the role of security professionals and law enforcement in supporting such research, as well as factors including personality traits which must be further researched whilst exploring online criminal behaviour. By understanding online offenders and their pathways towards malevolent behaviours, we can better identify steps that need to be taken to prevent such criminal activities.
Sgr A$^*$: a laboratory to measure the central black hole and cluster parameters
Creators: name: Nucita, A. A.
name: De Paolis, F.
name: Ingrosso, G.
name: Qadir, A.
name: Zakharov, A. F.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Several stars orbit around a black hole candidate of mass $3.7\times 10^6$ M$_{\odot}$, in the region of the Galactic Center (GC). Looking for General Relativistic (GR) periastron shifts is limited by the existence of a stellar cluster around the black hole that would modify the orbits due to classical effects that might mask the GR effect. Only if one knows the cluster parameters (its mass and core radius) it is possible to unequivocally deduce the GR effects expected and then test them. In this paper it is shown that the observation of the proper motion of Sgr A$^*$, $v_{Sgr A^*} = (0.4\pm 0.9)$ km s$^{-1}$ (\citealt{reid2004}), could help us to constrain the cluster parameters significantly and that future measurements of the periastron shifts for at least three stars may adequately determine the cluster parameters and the mass of the black hole.
description: in press on PASP, 2007
Non-wire Alternatives Coordination toward Efficient Power System Planning
Creators: Q. Hu
S. Guggilam
Publisher: name: IEEE
Year: 2022

Recent years have witnessed a growing attention on non-wire alternatives (NWAs) toward beneficial power system planning instead of traditional wire expansion. The I-5 corridor project in the Pacific Northwest of the United States explores the distributed energy resource (DER) alternative to improve available transfer capability. However, it remains an open challenge regarding how to efficiently aggregate the NWA resources for combinatorial coordination with bulk power systems. To maintain power system stable and reliable, distribution system operators (DSOs) should be given the responsibility to provide virtual inertia for dynamic regulation, to curtail elastic load for resilience enhancement, and to achieve seasonal peak shaving for expansion deferral. Therefore, this panel will focus on:
1) Virtual inertia and primary frequency regulation provision of NWAs
2) Resilient power system operation and planning supported by NWAs
3) Integrated hierarchical transmission-distribution market
4) Grid services and secure data exchange through NWAs.
Recent years have witnessed a growing attention on non-wire alternatives (NWAs) toward beneficial power system planning instead of traditional wire expansion. The I-5 corridor project in the Pacific Northwest of the United States explores the distributed energy resource (DER) alternative to improve available transfer capability. However, it remains an open challenge regarding how to efficiently aggregate the NWA resources for combinatorial coordination with bulk power systems. To maintain power system stable and reliable, distribution system operators (DSOs) should be given the responsibility to provide virtual inertia for dynamic regulation, to curtail elastic load for resilience enhancement, and to achieve seasonal peak shaving for expansion deferral. Therefore, this panel will focus on:
1) Virtual inertia and primary frequency regulation provision of NWAs
2) Resilient power system operation and planning supported by NWAs
3) Integrated hierarchical transmission-distribution market
4) Grid services and secure data exchange through NWAs.
Radio-frequency discharges in Oxygen. Part 1: Modeling
Creators: name: Bronold, F. X.
name: Matyash, K.
name: Tskhakaya, D.
name: Schneider, R.
name: Fehske, H.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: In this series of three papers we present results from a combined experimental and theoretical effort to quantitatively describe capacitively coupled radio-frequency discharges in oxygen. The particle-in-cell Monte-Carlo model on which the theoretical description is based will be described in the present paper. It treats space charge fields and transport processes on an equal footing with the most important plasma-chemical reactions. For given external voltage and pressure, the model determines the electric potential within the discharge and the distribution functions for electrons, negatively charged atomic oxygen, and positively charged molecular oxygen. Previously used scattering and reaction cross section data are critically assessed and in some cases modified. To validate our model, we compare the densities in the bulk of the discharge with experimental data and find good agreement, indicating that essential aspects of an oxygen discharge are captured.
description: 11 pages, 10 figures
การเปรียบเทียบผลการเรียนแบบวัฎจักรการเรียนรู้ 7 ขั้น ที่ใช้เทคนิคการรู้คิดที่มีต่อ การเปลี่ยนแปลงแนวความคิดเลือกเกี่ยวกับมโนมติชีววิทยาและทักษะกระบวนการ ทางวิทยาศาสตร์ขั้นพื้นฐาน ของนักเรียนชั้นประถมศึกษาปีที่ 5ที่มีผลการเรียนวิทยาศาสตร์ต่างกัน
Creators: name: พรทิพย์ ภัทราภิรักษ์
name: ไพฑูรย์ สุขศรีงาม
name: จีระพรรณ สุขศรีงาม
name: และมยุรี ภารการ
Publisher: name: มหาวิทยาลัยราชภัฏมหาสารคาม
Year: 2009
Subjects: วัฏจักรการเรียนรู้ 7 ขั้น ที่ใช้เทคนิคการรู้คิด, แนวความคิดเลือก, ทักษะกระบวนการทางวิทยาศาสตร์ขั้นพื้นฐาน

description: 1, 3, วารสารมหาวิทยาลัยราชภัฏมหาสารคามมนุษยศาสตร์และสังคมศาสตร์
Time- and Spacelike Nucleon Electromagnetic Form Factors beyond Relativistic Constituent Quark Models
Creators: name: de Melo, J. P. B. C.
name: Frederico, T.
name: Pace, E.
name: Pisano, S.
name: Salmè, G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: For the first time, a phenomenological analysis of the experimental electromagnetic form factors of the nucleon, both in the timelike and spacelike regions, is performed by taking into account the effects of nonvalence components in the nucleon state, within a light-front framework. Our model, based on suitable Ansatzes for the nucleon Bethe-Salpeter amplitude and a microscopic version of the well-known Vector Meson Dominance model, has only four free parameters (determined by the spacelike data with $χ^2/datum \sim 1.7$), and yields a nice description of the experimental electromagnetic form factors in the physical region in the range $-30 (GeV/c)^2 < q^2 < 20 (GeV/c)^2$, except for the neutron one in the timelike region. Valuable information can be gained in the timelike region on possible missing Vector Mesons around $q^2 \sim 4.5 (GeV/c)^2$ and $q^2 \sim 8.0 (GeV/c)^2$
description: 11 pages, 4 figures. Changed .sty, and added more details. PLB in press
Binarity in Cool Asymptotic Giant Branch Stars: A Galex Search for Ultraviolet Excesse
Creators: name: Sahai, R.
name: Findeisen, K.
name: de Paz, A. Gil
name: Contreras, C. Sánchez
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The search for binarity in AGB stars is of critical importance for our understanding of how planetary nebulae acquire the dazzling variety of aspherical shapes which characterises this class. However, detecting binary companions in such stars has been severely hampered due to their extreme luminosities and pulsations. We have carried out a small imaging survey of AGB stars in ultraviolet light (using GALEX) where these cool objects are very faint, in order to search for hotter companions. We report the discovery of significant far-ultraviolet excesses towards nine of these stars. The far-ultraviolet excess most likely results either directly from the presence of a hot binary companion, or indirectly from a hot accretion disk around the companion.
description: revised for Astrophysical Journal
Dual-Octave Convolution for Accelerated Parallel MR Image Reconstruction
Creators: name: Feng, Chun-Mei
name: Yang, Zhanyuan
name: Chen, Geng
name: Xu, Yong
name: Shao, Ling
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: Magnetic resonance (MR) image acquisition is an inherently prolonged process, whose acceleration by obtaining multiple undersampled images simultaneously through parallel imaging has always been the subject of research. In this paper, we propose the Dual-Octave Convolution (Dual-OctConv), which is capable of learning multi-scale spatial-frequency features from both real and imaginary components, for fast parallel MR image reconstruction. By reformulating the complex operations using octave convolutions, our model shows a strong ability to capture richer representations of MR images, while at the same time greatly reducing the spatial redundancy. More specifically, the input feature maps and convolutional kernels are first split into two components (i.e., real and imaginary), which are then divided into four groups according to their spatial frequencies. Then, our Dual-OctConv conducts intra-group information updating and inter-group information exchange to aggregate the contextual information across different groups. Our framework provides two appealing benefits: (i) it encourages interactions between real and imaginary components at various spatial frequencies to achieve richer representational capacity, and (ii) it enlarges the receptive field by learning multiple spatial-frequency features of both the real and imaginary components. We evaluate the performance of the proposed model on the acceleration of multi-coil MR image reconstruction. Extensive experiments are conducted on an {in vivo} knee dataset under different undersampling patterns and acceleration factors. The experimental results demonstrate the superiority of our model in accelerated parallel MR image reconstruction. Our code is available at: github.com/chunmeifeng/Dual-OctConv.
description: Proceedings of the 35th AAAI Conference on Artificial Intelligence (AAAI) 2021
$D_{s0}(2590)$ as a dominant $c\bar{s}$ state with a small $D^*K$ component
Creators: name: Xie, Jia-Ming
name: Liu, Ming-Zhu
name: Geng, Li-Sheng
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The recently discovered $D_{s0}(2590)$ state by the LHCb collaboration was regarded as the first excited state of $^1S_{0}$ charmed-strange meson. Its mass is, however, lower than the Godfrey-Isgur quark model prediction by about 80 MeV. In this work, we take into account the $D^{\ast}K$ contribution to the bare $c\bar{s}$ state, and show that the coupled-channel interaction induces an 88 MeV shift with respect to the conventional quark model $c\bar{s}$ state, which is much closer to the experimental mass. Our study shows that in addition to $S$-wave, $P$-wave coupled-channel interactions also play a role for hadrons located close to two-hadron thresholds. We further scrutinize the unquenched quark model results with a model independent approach. It is shown that the two-body $D^*K$ decay width is proportional to the weight of the $D^*K$ component. To saturate the experimental total decay width with the $D^*K$ partial decay width we need a weight of about 60\% while to reproduce the unquenched quark model result a weight of about 5\% is needed. Therefore, we encourage future experimental studies on the two-body $D^*K$ partial decay of $D_{s0}(2590)$.
description: 13 pages, 1 figure
AGN Selection Methods Have Profound Impacts on the Distributions of Host Galaxy Properties
Creators: name: Ji, Zhiyuan
name: Giavalisco, Mauro
name: Kirkpatrick, Allison
name: Kocevski, Dale
name: Daddi, Emanuele
name: Delvecchio, Ivan
name: Hatcher, Cassandra
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a comparative study of X-ray and IR AGNs at $z\approx2$ to highlight the important AGN selection effects on the distributions of host galaxy properties. Compared with non-AGN star-forming galaxies (SFGs) on the main sequence, X-ray AGNs have similar median star formation (SF) properties, but their incidence (q$_{\rm{AGN}}$) is higher among galaxies with either enhanced or suppressed SF, and among galaxies with larger stellar mass surface density, regardless if it is measured within half-light radius ($Σ_e$) or central 1kpc ($Σ_{\rm{1kpc}}$). Unlike X-ray AGNs, IR AGNs are less massive, and have enhanced SF and similar distributions of colors, $Σ_e$ and $Σ_{\rm{1kpc}}$ relative to non-AGN SFGs. Given that $Σ_e$ and $Σ_{\rm{1kpc}}$ strongly correlate with M$_*$, we introduce the fractional mass within central 1kpc ($\rm{\frac{M_{1kpc}}{M_*}}$), which only weakly depends on M$_*$, to quantify galaxy compactness. Both AGN populations have similar $\rm{\frac{M_{1kpc}}{M_*}}$ distributions compared to non-AGN SFGs'. While q$_{\rm{AGN}}$ increases with $Σ_e$ and $Σ_{\rm{1kpc}}$, it remains constant with $\rm{\frac{M_{1kpc}}{M_*}}$, indicating that the trend of increasing q$_{\rm{AGN}}$ with $\rmΣ$ is driven by M$_*$ more than morphology. While our findings are not in conflict with the scenario of AGN quenching, they do not imply it either, because the incidence of AGNs hosted in transitional galaxies depends crucially on AGN selections. Additionally, despite the relatively large uncertainty of AGN bolometric luminosities, their very weak correlation, if any, with SF activities, regardless of AGN selections, also argues against a direct causal link between the presences of AGNs and the quenching of massive galaxies at $z\sim2$.
description: 26 pages, 28 figures; published in ApJ; https://doi.org/10.3847/1538-4357/ac3837
Polaris B, an optical companion of Polaris (alpha UMi) system: atmospheric parameters, chemical composition, distance and mass
Creators: name: Usenko, Igor
name: Klochkova, Valentina
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present an analysis of high-resolution spectroscopic observations of Polaris B, the optical companion of the Polaris Ab system. The star has a radial velocity V_r of -16.6km/s to -18.9km/s, and a projected rotational velocity vsini=110 km/s. The derived atmospheric parameters are: Teff=6900K; logg=4.3; V_t=2.5km/s. Polaris B has elemental abundances generally similar to those of the Cepheid Polaris A (Usenko et al. 2005a), although carbon, sodium and magnesium are close to the solar values. At a spectral type of F3V Polaris B has a luminosity of 3.868L_sun, an absolute magnitude of +3.30mag, and a distance of 109.5pc. The mass of the star is estimated to be 1.39M_sun, close to a mass of 1.38+/-0.61M_sun for the recently-resolved orbital periods companion Polaris Ab observed by Evans et al. (2007).
description: 6 pages, 3 figures, 1 table
On Ohm's law in reduced plasma fluid models
Creators: name: Dudson, B. D.
name: Newton, S. L.
name: Omotani, J. T.
name: Birch, J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Drift-reduced MHD models are widely used to study magnetised plasma phenomena, in particular for magnetically confined fusion applications, as well as in solar and astrophysical research. This letter discusses the choice of Ohm's law in these models, the resulting dispersion relations for the dynamics parallel to the magnetic field, and the implications for numerical simulations. We find that if electron pressure is included in Ohm's law, then both electromagnetic and finite electron mass effects must also be included in order to obtain physical dispersion relations. A simple modification to the plasma vorticity is also found which improves handling of low density regions, of particular relevance to the simulation of the boundary region of magnetised plasmas.
description: 21 pages, 3 figures. To be submitted to PPCF
Optical Weights and Waterfalls in Doped Charge Transfer Insulators: an LDA+DMFTStudy of LSCO
Creators: name: Weber, Cédric
name: Haule, Kristjan
name: Kotliar, Gabriel
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: We use the Local Density Approximation in combination with the Dynamical Mean Field Theory to investigate intermediate energy properties of the copper oxides. We identify coherent and incoherent spectral features that results from doping a charge transfer insulator, namely quasiparticles, Zhang-Rice singlet band, and the upper and lower Hubbard bands. Angle resolving these features, we identify a \emphasize{waterfall} like feature, between the quasiparticle part and the incoherent part of the Zhang-Rice band. We investigate the assymetry between particle and hole doping. On the hole doped side, there is a very rapid transfer of spectral weight upon doping in the one particle spectra. The optical spectral weight increases superlinearly on the hole doped side in agreement with experiments.
description: 4 pages
Dynamics of Quantum Vorticity in a Random Potential
Creators: name: Link, Bennett
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: I study the dynamics of a superfluid vortex in a random potential, as in the inner crust of a neutron star. Below a critical flow velocity of the ambient superfluid, a vortex is effectively immobilized by lattice forces even in the limit of zero dissipation. Low-velocity, translatory motion is not dynamically possible, a result with important implications for understanding neutron star precession and the dynamical properties of superfluid nuclear matter.
description: Physical Review Letters, final version
Il paese dei balocchi. Variazione sul tema delle “regole del gioco”, tra diritto e letteratura
Creators: name: Corigliano, Fabio
Publisher: name: Cultura giuridica e diritto vivente
Year: 2021

description: [The land of toys. Variation on the "rules of the game", between law and literature] Among constitutionalists, political scientists, political philosophers and of course philosophers of law, and now also in the context of common discourse, the "rules of the game" are those rules of coexistence corresponding to the background of norms and "practices" governing the common life of men. But what are the rules of the game? Or better: what is the affinity rule that would allow the juxtaposition between play and life in human society? This contribution tries to suggest an alternative elaboration of the practice of play starting from childhood play, through the reading of some classics of children's literature.
description: Cultura giuridica e diritto vivente, V. 8 (2021)
Cyber Secure Grid-Interactive Efficient Buildings to Enhance Power System Flexibility and Resilience
Creators: V. Chandan
Y. Zhang
Publisher: name: IEEE
Year: 2022

Modern buildings are becoming more intelligent with advanced optimization, communications, sensors, and control technologies. They are no longer passive receivers of electricity from the grid but are becoming active participants in the grid, known as the grid-interactive efficient buildings (GEBs). With increasing distributed energy resources (DERs, including behind-the-meter ones) in distribution networks, GEBs are expected to integrate various flexible resources to provide multi-time-scale ancillary services, especially under FERC order 2222. Additionally, recent extreme events motivate GEBs to provide user-end resilience when the bulk power systems are undergoing a generation outage or even blackouts. However, the increasing interactions between GEBs and the main grid could induce cyber vulnerability, the impact of which is still not clear. This panel session will discuss new opportunities for GEBs as a core hub for DER integration, an active player in the ancillary service market, a key thrust for grid resilience as well as the associated security issues and solutions.
Modern buildings are becoming more intelligent with advanced optimization, communications, sensors, and control technologies. They are no longer passive receivers of electricity from the grid but are becoming active participants in the grid, known as the grid-interactive efficient buildings (GEBs). With increasing distributed energy resources (DERs, including behind-the-meter ones) in distribution networks, GEBs are expected to integrate various flexible resources to provide multi-time-scale ancillary services, especially under FERC order 2222. Additionally, recent extreme events motivate GEBs to provide user-end resilience when the bulk power systems are undergoing a generation outage or even blackouts. However, the increasing interactions between GEBs and the main grid could induce cyber vulnerability, the impact of which is still not clear. This panel session will discuss new opportunities for GEBs as a core hub for DER integration, an active player in the ancillary service market, a key thrust for grid resilience as well as the associated security issues and solutions.