cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
First application of dispersive optical model to ($p$,$2p$) analysis within distorted wave impulse approximation framework
Creators: name: Yoshida, K.
name: Atkinson, M. C.
name: Ogata, K.
name: Dickhoff, W. H.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Both ($e$,$e'p$) and ($p$,$2p$) reactions have been performed to study the proton single-particle character of nuclear states with its related spectroscopic factor. Recently, the dispersive optical model (DOM) was applied to the ($e$,$e'p$) analysis revealing that the traditional treatment of the single-particle overlap function, distorted waves, and nonlocality must be further improved to achieve quantitative nuclear spectroscopy. We apply the DOM wave functions to the traditional ($p$,$2p$) analysis and investigate the consistency of the DOM spectroscopic factor that describes the ($e$,$e'p$) cross section with the result of the ($p$,$2p$) analysis. Additionally, we make a comparison with a phenomenological single-particle wave function and optical potential. Uncertainty arising from a choice of $p$-$p$ interaction is also investigated. We implement the DOM wave functions to the distorted wave impulse approximation (DWIA) framework for ($p$,$2p$) reactions. DOM + DWIA analysis on $^{40}$Ca($p$,$2p$)$^{39}$K data generates a proton $0d_{3/2}$ spectroscopic factor of 0.560, which is meaningfully smaller than the DOM value of 0.71 shown to be consistent with the ($e$,$e'p$) analysis. Uncertainties arising from choices of single-particle wave function, optical potential, and $p$-$p$ interaction do not explain this inconsistency. The inconsistency in the spectroscopic factor suggests there is urgent need for improving the description of $p$-$p$ scattering in a nucleus and the resulting in-medium interaction with corresponding implications for the analysis of this reaction in inverse kinematics.
High-Resolution Observations of Molecular Lines toward the Hot Core G28.20-0.04N
Creators: name: Qin, Sheng-Li
name: Huang, Maohai
name: Wu, Yuefang
name: Xue, Rui
name: Chen, Sheng
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the results from arcsecond resolution observations of various line transitions at 1.3 mm toward hypercompact HII region G28.20-0.04N. With the SMA data, we have detected and mapped the transitions in the CH$_{3}$CN, CO, $^{13}$CO, SO$_{2}$, OCS, and CH$_{3}$OH molecular lines as well as the radio recombination line H30$α$. The observations and analysis indicate a hot core associated with G28.20-0.04N. The outflow and possible rotation are detected in this region.
description: 12 pages, 4 figures, accepted for publication in ApJL
An Efficient Rapid Method for Generators Coherency Identification in Large Power Systems
Creators: Alireza Mehrzad
Milad Darmiani
Yashar Mousavi
Miadreza Shafie-Khah
and Mohammadreza Aghamohammadi
Publisher: name: IEEE
Year: 2022

This paper develops a straightforward and efficient generator coherency identification approach.
With steadily increasing interest in enhancing large power systems' transient stability, generator coherency identification has become critical for the dynamic equivalents, controlled-islanding, and wide-area control of these systems. This paper presents an approach based on two classical and powerful techniques. The proposed method comprises the slow coherency method followed by the time-domain-based simulation of transient stability to identify the coherent groups of generators. In this regard, various operating conditions of the system are considered to obtain the updated coherency information between groups of generators by analyzing the chosen generator rotor angle. The proposed approach's merits are tested on the New England IEEE 39-Bus and modified IEEE 118-Bus test systems in the PowerFactory software tools through Python. Corresponding simulation results validate the proposed paradigm's effectiveness by enhancing the transient stability speed of a large power system without decreasing its coherency behavior accuracy. It is also observed that the proposed scheme tends to be more consistent in determining the coherent groups of generators in the presence of disturbances and different operational conditions.
Load-Altering Attacks Against Power Grids Under COVID-19 Low-Inertia Conditions
Creators: Subhash Lakshminarayana
Juan Ospina
and Charalambos Konstantinou
Publisher: name: IEEE
Year: 2022

In this article, a comprehensive analysis is performed of the impacts on electric power system operations caused by strict lockdown measures implemented worldwide during the COVID-19 pandemic.
The COVID-19 pandemic has impacted our society by forcing shutdowns and shifting the way people interacted worldwide. In relation to the impacts on the electric grid, it created a significant decrease in energy demands across the globe. Recent studies have shown that the low demand conditions caused by COVID-19 lockdowns combined with large renewable generation have resulted in extremely low-inertia grid conditions. In this work, we examine how an attacker could exploit these scenarios to cause unsafe grid operating conditions by executing load-altering attacks (LAAs) targeted at compromising hundreds of thousands of IoT-connected high-wattage loads in low-inertia power systems. Our study focuses on analyzing the impact of the COVID-19 mitigation measures on U.S. regional transmission operators (RTOs), formulating a plausible and realistic least-effort LAA targeted at transmission systems with low-inertia conditions, and evaluating the probability of these large-scale LAAs. Theoretical and simulation results are presented based on the WSCC 9-bus and IEEE 118-bus test systems. Results demonstrate how adversaries could provoke major frequency disturbances by targeting vulnerable load buses in low-inertia systems and offer insights into how the temporal fluctuations of renewable energy sources, considering generation scheduling, impact the grid's vulnerability to LAAs.
Developing the cyclotactor
Creators: name: de Jong, Staas
Publisher: name: arXiv
Year: 2021
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences
subject: H.5.5

description: This paper presents developments in the technology underlying the cyclotactor, a finger-based tactile I/O device for musical interaction. These include significant improvements both in the basic characteristics of tactile interaction and in the related (vibro)tactile sample rates, latencies, and timing precision. After presenting the new prototype's tactile output force landscape, some of the new possibilities for interaction are discussed, especially those for musical interaction with zero audio/tactile latency.
description: Proceedings of the International Conference on New Interfaces for Musical Expression, 2009
Optimal Controllers to Improve Transient Recovery of Grid-Following Inverters Connected to Weak Power Grids
Creators: Thilini Hathiyaldeniye
Chandana Karawita
Bagen Bagen
Nalin Pahalawaththa
and Udaya D. Annakkage
Publisher: name: IEEE
Year: 2022

The concept of storing energy in the inverter sub-module capacitors and temporarily increasing the inverter current limit to achieve a rapid energy flow is adopted in this paper to enhance the fault recovery of inverter-based generations.
Leading to the enormous growth in renewable and power electronics technologies and the global drive towards environmental friendliness and sustainability, a significant number of renewable energy sources are being connected to the power system via inverter-based systems. The inverter-based generations (IBG) have no stored energy and less fault current injection capability compared to the conventional synchronous machines. Consequently, a large penetration of IBG creates challenges to maintaining the stability of the power system, especially the transient stability. The weaker the power system, the higher the significance of instability. Few solutions exist in the literature to improve the fault recovery of IBG connected to weak power systems. This paper considers the method of storing energy in sub-module capacitors of the Modular-Multi-level Converter (MMC) along with temporarily boosting the inverter's current limit. Conversely, increasing the ratings of the inverter will result in high manufacturing costs. Hence an optimization strategy is proposed in this paper, for obtaining a robust set of inverter control parameters that enhances fault recovery without excessively increasing the manufacturing cost of MMC. A frequency scanning technique supplemented with Generalized Nyquist criteria is incorporated into the optimization methodology to constrain the search space for the optimization algorithm. This enables the optimization algorithm to converge to an acceptable solution with a reasonable computing time. Furthermore, validation of the resultant set of parameters for different system conditions is presented. Finally, IBG with optimized fault recovery controllers is integrated into a simplified real-world power system, and the applicability of the proposed optimized controllers is illustrated.
First-principles study of ternary fcc solution phases from special quasirandom structures
Creators: name: Shin, Dongwon
name: van de Walle, Axel
name: Wang, Yi
name: Liu, Zi-Kui
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In the present work, ternary Special Quasirandom Structures (SQSs) for a fcc solid solution phase are generated at different compositions, $x_A=x_B=x_C=\tfrac{1}{3}$ and $x_A=\tfrac{1}{2}$, $x_B=x_C=\tfrac{1}{4}$, whose correlation functions are satisfactorily close to those of a random fcc solution. The generated SQSs are used to calculate the mixing enthalpy of the fcc phase in the Ca-Sr-Yb system. It is observed that first-principles calculations of all the binary and ternary SQSs in the Ca-Sr-Yb system exhibit very small local relaxation. It is concluded that the fcc ternary SQSs can provide valuable information about the mixing behavior of the fcc ternary solid solution phase. The SQSs presented in this work can be widely used to study the behavior of ternary fcc solid solutions.
description: 20 pages, 7 figures
Decomposition-Residuals Neural Networks: Hybrid System Identification Applied to Electricity Demand Forecasting
Creators: Konstantinos Theodorakos
Oscar Mauricio Agudelo
Marcelo Espinoza
and Bart De Moor
Publisher: name: IEEE
Year: 2022

In this paper Decomposition-Residuals Deep Neural Networks have been applied to the problem of short-term load forecasting.
Day-ahead energy forecasting systems struggle to provide accurate demand predictions due to pandemic mitigation measures. Decomposition-Residuals Deep Neural Networks (DR-DNN) are hybrid point-forecasting models that can provide more accurate electricity demand predictions than single models within the COVID-19 era. DR-DNN is a novel two-layer hybrid architecture with: a decomposition and a nonlinear layer. Based on statistical tests, decomposition applies robust signal extraction and filtering of input data into: trend, seasonal and residuals signals. Utilizing calendar information, temporal signals are added: sinusoidal day/night cycles, weekend/weekday, etc. The nonlinear layer learns unknown complex patterns from all those signals, with the usage of well-established deep neural networks. DR-DNN outperformed baselines and state-of-the-art deep neural networks on next-day electricity forecasts within the COVID-19 era (from September 2020 to February 2021), both with fixed and Bayesian optimized hyperparameters. Additionally, model interpretability is improved, by indicating which endogenous or exogenous inputs contribute the most to specific hour-ahead forecasts. Residual signals are very important on the first hour ahead, whereas seasonal patterns on the 24th. Some calendar features also ranked high: whether it is day or night, weekend or weekday and the hour of the day. Temperature was the most important exogenous factor.
Infrared signatures of quantum bounce in a minisuperspace analysis of Lema\^ıtre-Tolman-Bondi dust collapse
Creators: name: Sahota, Harkirat Singh
name: Lochan, Kinjalk
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In the quantum treatment of collapsing matter, a viable mode analysis is supposed to give information regarding emission during the collapse. Nevertheless, partly owing to operator ordering ambiguities involved in a typical quantum gravity analysis, the availability of such well-defined modes is not guaranteed. We study the mode decomposition of the unitarily evolving wave packet constructed for the quantum model of spherically symmetric dust collapsing in a marginally bound Lema\^ıtre-Tolman-Bondi (LTB) model. We identify the observable depicting mode decomposition, and using the freedom of operator ordering ambiguity, we obtain the Hermitian extension of this operator alongside the Hermitian Hamiltonian. After identifying incoming and outgoing modes with this operator's eigenstates, we estimate their contributions to the radiation profile. The infrared sector of this process demonstrates some characteristic features which turn out to be highly sensitive to the near-bounce dynamics of the dust cloud. Near the epoch of classical singularity, there is a significant contribution from incoming/outgoing modes of small wavenumber in the expanding/collapsing phase of the dust cloud, which keeps on decreasing as one moves away from the singularity. The information of the bounce is carried over to the infrared modes through a flip from largely incoming to largely outgoing radiation as the evolution progresses from collapsing to expanding phase, much before the information of bounce comes about to any observer. In the infrared sector, the saturation value of the amplitude marks the bounce radius. Thus, we argue that the information of the short scale physics is essentially carried over to the longest wavelength in this quantum gravity model, which we argue is rather more prominent for low energy processes.
description: 21 pages, 5 figures, Version published in Phys. Rev. D
Kaon production from 1 to 40 A GeV
Creators: name: Larionov, A. B.
name: Mosel, U.
name: Wagner, M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Kaon production is studied within the Giessen Boltzmann-Uehling-Uhlenbeck (GiBUU) model. Results are compared with experiment and with other models. The influence of the kaon potential on the kaon azimuthal distributions at SIS energies is considered. We also discuss the role of the many-body collisions at high-density phase of reaction.
description: 6 pages, 4 figures, Proc. of the Int. Workshop on Hot and Dense Matter in Relativistic Heavy Ion Collisions, 09-12.04.2006, Budapest
Phase diagram of hole doped two-leg Cu-O ladders
Creators: name: Chudzinski, P.
name: Gabay, M.
name: Giamarchi, T.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: In the weak coupling limit, we establish the phase diagram of a two-leg ladder with a unit cell containing both Cu and O atoms, as a function of doping. We use bosonization and design a specific RG procedure to handle the additional degrees of freedom. Significant differences are found with the single orbital case; for purely repulsive interactions, a completely massless quantum critical region is obtained at intermediate carrier concentrations (well inside the bands) where the ground state consists of an incommensurate pattern of orbital currents plus a spin density wave (SDW) structure.
description: 4 pages, 2 figures, accepted to Phys. Rev. B, Rapid Comm
CertainNet: Sampling-free Uncertainty Estimation for Object Detection
Creators: name: Gasperini, Stefano
name: Haug, Jan
name: Mahani, Mohammad-Ali Nikouei
name: Marcos-Ramiro, Alvaro
name: Navab, Nassir
name: Busam, Benjamin
name: Tombari, Federico
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Estimating the uncertainty of a neural network plays a fundamental role in safety-critical settings. In perception for autonomous driving, measuring the uncertainty means providing additional calibrated information to downstream tasks, such as path planning, that can use it towards safe navigation. In this work, we propose a novel sampling-free uncertainty estimation method for object detection. We call it CertainNet, and it is the first to provide separate uncertainties for each output signal: objectness, class, location and size. To achieve this, we propose an uncertainty-aware heatmap, and exploit the neighboring bounding boxes provided by the detector at inference time. We evaluate the detection performance and the quality of the different uncertainty estimates separately, also with challenging out-of-domain samples: BDD100K and nuImages with models trained on KITTI. Additionally, we propose a new metric to evaluate location and size uncertainties. When transferring to unseen datasets, CertainNet generalizes substantially better than previous methods and an ensemble, while being real-time and providing high quality and comprehensive uncertainty estimates.
description: Published at IEEE Robotics and Automation Letters (RA-L)
Smoothed Bernstein Online Aggregation for Short-Term Load Forecasting in IEEE DataPort Competition on Day-Ahead Electricity Demand Forecasting: Post-COVID Paradigm
Creators: Florian Ziel
Publisher: name: IEEE
Year: 2022

A winning method of the IEEE DataPort Competition on Day-Ahead Electricity Demand Forecasting: Post-COVID Paradigm is presented.
We present a winning method of the IEEE DataPort Competition on Day-Ahead Electricity Demand Forecasting: Post-COVID Paradigm. The day-ahead load forecasting approach is based on a novel online forecast combination of multiple point prediction models. It contains four steps: i) data cleaning and preprocessing, ii) a new holiday adjustment procedure, iii) training of individual forecasting models, iv) forecast combination by smoothed Bernstein Online Aggregation (BOA). The approach is flexible and can quickly adjust to new energy system situations as they occurred during and after COVID-19 shutdowns. The ensemble of individual prediction models ranges from simple time series models to sophisticated models like generalized additive models (GAMs) and high-dimensional linear models estimated by lasso. They incorporate autoregressive, calendar, and weather effects efficiently. All steps contain novel concepts that contribute to the excellent forecasting performance of the proposed method. It is especially true for the holiday adjustment procedure and the fully adaptive smoothed BOA approach.
Double quantum dot with integrated charge sensor based on Ge/Si heterostructure nanowires
Creators: name: Hu, Yongjie
name: Churchill, Hugh H. O.
name: Reilly, David J.
name: Xiang, Jie
name: Lieber, Charles M.
name: Marcus, Charles M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Coupled electron spins in semiconductor double quantum dots hold promise as the basis for solid-state qubits. To date, most experiments have used III-V materials, in which coherence is limited by hyperfine interactions. Ge/Si heterostructure nanowires seem ideally suited to overcome this limitation: the predominance of spin-zero nuclei suppresses the hyperfine interaction and chemical synthesis creates a clean and defect-free system with highly controllable properties. Here we present a top gate-defined double quantum dot based on Ge/Si heterostructure nanowires with fully tunable coupling between the dots and to the leads. We also demonstrate a novel approach to charge sensing in a one-dimensional nanostructure by capacitively coupling the double dot to a single dot on an adjacent nanowire. The double quantum dot and integrated charge sensor serve as an essential building block required to form a solid-state spin qubit free of nuclear spin.
description: Related work at http://marcuslab.harvard.edu and http://cmliris.harvard.edu
Anacroneuria darien Gutiérrez-Fonseca, 2015, sp. n.
Creators: name: Gutiérrez-Fonseca, Pablo E.
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Plecoptera
Perlidae
Anacroneuria
Anacroneuria darien

description: Anacroneuria darien, sp. n.
(Figs. 2–7)
 Material examined. Holotype ♂ (USNM), Panama: Darién, Darién National Park, field station near to the Perresenico stream, 8° 01' 10.41''N; 77° 44' 17.44'' W, 94 m asl, 17–22 November 2014, R. Salas, PE Gutiérrez Fonseca, light trap. Paratypes: 1♂, 3♀ (PEGFC). Same location. 1♂, 2♀ (MIUP). Same location.
 Adult habitus. General color yellow. Head yellow, with a small brown spot, very diffuse, between ocelli; antennae brown with base yellow. Pronotum yellow, sides with a soft light brown, and margin yellow. Femora mostly yellow with a dark apical band. Tibiae dark yellow with a dark apical band. Wing membrane transparent, veins yellow. Cerci yellow (Fig. 2).
 Male. Forewing length 9.5–10 mm. Hammer thimble-shaped, with height subequal to apical diameter (Fig. 3). Aedeagal apex simple, rounded at tip; shoulders project slightly, giving apex a trilobed appearance (Fig. 4). Lateral aspect of aedeagus with acute tip (Fig. 5). Ventral membranous lobes large, covering shoulders and most of apex (Fig. 6). Dorsal keel absent, aedeagal hooks slender.
 Female. Forewing length 11.5–12.5 mm. Body coloration similar to male. Subgenital plate with four subequal lobes, median notch deep and V-shaped. Mesal sclerite of sternum 9 V-shaped; sterna covered with short fine setae, lateral areas sparsely clothed with large setae (Fig. 7).
 Nymph. Unknown.
 Etymology. The species name, based on the type locality at the Darién National Park, is used as a noun in apposition.
 Comments. Anacroneuria darien is similar to A. curiosa Stark 1998. However, the lateral bands of the pronotum are dark brown in A. curiosa and light brown in A. darien. The aedeagus is also similar to that of A. curiosa, but A. darien lacks a dorsal keel. The aedeagus of A. darien is also similar to the Colombian species A. albimacula Klapálek 1921 (Stark et al. 1999), differing in several structures, such as the membranous lobes. These species also differ in their pronotal stripes. In addition, the description of the subgenital plate of A. darien is very similar to the description of Anacroneuria sp. F. by Harper (1992). However, the pronotum of Anacroneuria sp. F. is pale with two narrow sublateral darker stripes.
description: Published as part of Gutiérrez-Fonseca, Pablo E., 2015, Three new species of Anacroneuria Klapálek (Plecoptera: Perlidae) from Panama, pp. 69-76 in Zootaxa 3957 (3) on page 71, DOI: 10.11646/zootaxa.3957.1.5, http://zenodo.org/record/288562
State-Space Models for Online Post-Covid Electricity Load Forecasting Competition
Creators: Joseph de Vilmarest and Yannig Goude
Publisher: name: IEEE
Year: 2022

The winning strategy for the IEEE DataPort Competition on Day-Ahead Electricity Load Forecasting: Post-Covid Paradigm is presented.
We present the winning strategy for the IEEE DataPort Competition on Day-Ahead Electricity Load Forecasting: Post-Covid Paradigm. This competition was organized to design new forecasting methods for unstable periods such as the one starting in Spring 2020. First, we pre-process the data with a statistical correction of the meteorological variables. Second, we apply standard statistical and machine learning models. Third, we rely on state-space models to adapt the aforementioned forecasters. It achieves the right compromise between two extremes. Indeed, machine learning methods allow to learn complex dependence to explanatory variables on a historical data set but fail to forecast non-stationary data accurately. Conversely, purely time-series models such as autoregressives are adaptive in essence but fail to capture dependence to exogenous variables. Finally, we use aggregation of experts, and we leverage the diversity of the set of obtained forecasters to improve our final predictions. The evaluation period of the competition was the occasion of trial and error and we put the focus on the final procedure.
Consequence of reputation in an open-ended Naming Game
Creators: name: Brigatti, Edgardo
Publisher: name: arXiv
Year: 2008
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: We study a modified version of the Naming Game, a recently introduced model which describes how shared vocabulary can emerge spontaneously in a population without any central control. In particular, we introduce a new mechanism that allows a continuous interchange with the external inventory of words. A novel playing strategy, influenced by the hierarchical structure that individuals' reputation defines in the community, is implemented. We analyze how these features influence the convergence times, the cognitive efforts of the agents and the scaling behavior in memory and time.
description: 6 pages, 6 figures
Evaluation Tests of Metal Oxide Varistors for DC Circuit Breakers
Creators: Chunmeng Xu
Andrew Rockhill
Zhi Jin Zhang
Matthew Bosworth
Maryam Saeedifard
Michael Steurer
Peter Zeller
and Lukas Graber
Publisher: name: IEEE
Year: 2022

In this paper, online-monitored stress endurance tests are performed on metal-oxide varistors that are employed in a 12 kV direct-current circuit breaker.
With emerging technologies and products in power semiconductors and ultrafast mechanical switches, direct-current circuit breakers (DCCBs) have been developing rapidly. Yet the metal-oxide varistors (MOVs), being the indispensable DCCB components, are less analyzed and tested so far. Generally, MOVs in DCCBs are used to dissipate energy and limit overvoltage surges during switching events. This emerging application of MOVs calls for new design procedures and evaluation tests to ensure MOV performance under non-standard stresses and repetitive energy pulses. In this paper, online-monitored stress endurance tests are performed on MOVs that are employed in a 12 kV DCCB. Most MOVs have endured the DCCB-derived stresses for about 3500 pulses with little variation in their voltage-current characteristics, while only one fails after 1000 pulse tests and gets damaged by a shunt conductive channel. Different from conventional operating points of MOVs in their voltage-current characteristics, the MOVs in DCCB applications are found to work routinely in the temporary overvoltage (TOV) region with a decreasing TOV current over time. As these behaviors of MOVs are scarcely reported in the literature or covered by their datasheets, this study presents one of the first publicly available endurance test data that address the knowledge gaps about energy-dissipating MOVs in switchgear applications.
The Integrals of Motion for the Deformed W-Algebra $W_{qt}(sl_N^)$ II: Proof of the commutation relations
Creators: name: Kojima, T.
name: Shiraishi, J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We explicitly construct two classes of infinitly many commutative operators in terms of the deformed W-algebra $W_{qt}(sl_N^)$, and give proofs of the commutation relations of these operators. We call one of them local integrals of motion and the other nonlocal one, since they can be regarded as elliptic deformation of local and nonlocal integrals of motion for the $W_N$ algebra.
description: Dedicated to Professor Tetsuji Miwa on the occasion on the 60th birthday
Anacroneuria laru Gutiérrez-Fonseca, 2015, sp. n.
Creators: name: Gutiérrez-Fonseca, Pablo E.
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Plecoptera
Perlidae
Anacroneuria
Anacroneuria laru

description: Anacroneuria laru, sp. n.
(Figs. 8–13)
 Material examined. Holotype ♂ (USNM), Panama: Darién, Darién National Park, field station near to the Perresenico stream, 8° 01' 10.41''N; 77° 44' 17.44'' W, 94 m asl, 17–22 November 2014, R. Salas, PE Gutiérrez Fonseca, light trap. Paratypes: 1♂, 2♀ (PEGFC). Same location. 1♂, (MIUP). Same location.
 Adult habitus. Head with dark brown lateral stripes, mid stripe yellow; stripe patterns extend to the pronotum, antennae evenly dark brown. Pronotum with median stripe yellow and lateral stripes dark brown. Fore femora banded in two sections, base section yellow and apical section dark. Most of mid and hind femora yellow, but apical ends dark. Fore tibiae dark, mid and hind light brown, but with a dark apical band. Wing membrane and veins dark brown. Cerci lightly brown at the base (Fig. 8).
 Male. Forewing length 7–8 mm. Hammer thimble-shaped, height more than apical diameter (Fig. 9). Aedeagal apex long and slender, scoop-shaped with rounded tip (Fig. 10). Lateral aspect of aedeagus spoon-shaped, distinctively arched (Fig. 11). Ventral membranous lobes small (Fig. 12). Dorsal keel absent, hooks slender.
 Female. Forewing length 9 mm. Body coloration similar to male. Subgenital plate bilobed, lobes about equal in length, with median notch V-shaped. Mesal field of sternum 9 uniformly covered with moderately long pale setae (Fig. 13).
 Nymph. Unknown.
 Etymology. Species name is in honor to biologist Luis Alonso Ramírez Ulate, of initials “ laru ”, for his outstanding contribution to the organization and consolidation of Macrolatinos, a Latin American network of aquatic scientists.
 Comments. The aedeagus of this species is similar to the Mexican species A. hoogstraali Jewett, 1958, with the apex spoon-shaped in lateral view and with small membranous lobes (Stark & Kondratieff 2004). However, the pigment patterns in the pronotum and head of these species are markedly different.
description: Published as part of Gutiérrez-Fonseca, Pablo E., 2015, Three new species of Anacroneuria Klapálek (Plecoptera: Perlidae) from Panama, pp. 69-76 in Zootaxa 3957 (3) on pages 71-74, DOI: 10.11646/zootaxa.3957.1.5, http://zenodo.org/record/288562
Energy Storage Participation in Wholesale Markets: The Impact of State-of-Energy Management
Creators: Shubhrajit Bhattacharjee
Ramteen Sioshansi
and Hamidreza Zareipour
Publisher: name: IEEE
Year: 2022

This paper examines the market implications of energy-storage participation models and state-of-energy management.
Wholesale electricity markets are undergoing reforms to allow greater participation of energy storage. These reforms raise questions regarding the roles of market operators in energy-storage management and the design of market-participation models and offer parameters for energy storage. This paper examines the market implications of energy-storage participation models and state-of-energy (SOE) management. To this end, we develop a bi-level stochastic optimization model, wherein the upper level represents a profit-maximizing energy-storage firm offering into a wholesale market. Lower-level problems represent market clearing under different uncertain operating conditions. Using complementarity theory and binary expansion, this model is recast as a single-level mixed-integer linear optimization problem, which can be solved using off-the-shelf software packages. We apply the model to an illustrative example and a comprehensive case study. We demonstrate that with uncertainty, self scheduling energy storage is suboptimal for the energy-storage firm. Relying on only the energy-storage firm to manage SOE can yield strategic behavior, whereby infeasible offers are submitted to affect dispatch and market prices. These findings can guide ongoing market-design reforms.
Removal of calcium containing inclusions during vacuum arc remelting
Creators: name: Samuelsson, Eva
Publisher: name: University of British Columbia
Year: 2010

description: The mechanism of removal of calcium containing inclusions in steel during Vacuum Arc Remelting has been investigated. Laboratory Electron Beam and industrial Vacuum Arc remelting electrodes and ingots were examined. Properties of the steels were determined with the aid of chemical and metallographic methods. It is proposed that the major mechanism of removal is rejection of calcium aluminates to a free surface. One third of the calcium sulphide is rejected with the calcium aluminates. The remainder reacts with aluminium oxide in the aluminates according to the following reaction: CaS + 1/3Al₂O₃= CaO + 2/3[Al] + [S]. Subsequently, the calcium oxide is also rejected and the dissolved sulphur reacts with sulphide forming elements during solidification. The final calcium content of the remelted steels, 5-10 ppm, was independent of the calcium content of the electrode. The results of this study are not in agreement with previous work, which attempts to establish the composition of the calcium aluminates as a function of the steel content of sulphur, aluminium and calcium. Specifically it is found that the influence of oxygen content has not previously been sufficiently taken into account.
Making grains tangible: microtouch for microsound
Creators: name: de Jong, Staas
Publisher: name: arXiv
Year: 2021
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Sound (cs.SD)
subject: Audio and Speech Processing (eess.AS)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: H.5.5

description: This paper proposes a new research direction for the large family of instrumental musical interfaces where sound is generated using digital granular synthesis, and where interaction and control involve the (fine) operation of stiff, flat contact surfaces. First, within a historical context, a general absence of, and clear need for, tangible output that is dynamically instantiated by the grain-generating process itself is identified. Second, to fill this gap, a concrete general approach is proposed based on the careful construction of non-vibratory and vibratory force pulses, in a one-to-one relationship with sonic grains. An informal pilot psychophysics experiment initiating the approach was conducted, which took into account the two main cases for applying forces to the human skin: perpendicular, and lateral. Initial results indicate that the force pulse approach can enable perceivably multidimensional, tangible display of the ongoing grain-generating process. Moreover, it was found that this can be made to meaningfully happen (in real time) in the same timescale of basic sonic grain generation. This is not a trivial property, and provides an important and positive fundament for further developing this type of enhanced display. It also leads to the exciting prospect of making arbitrary sonic grains actual physical manipulanda.
description: Proceedings of the International Conference on New Interfaces for Musical Expression, 2011
Estimating abundance and habitat suitability in a micro-endemic snake: the Walser viper
Creators: name: Ficetola, Gentile Francesco
name: Fanelli, Mauro
name: Garizio, Lorenzo
name: Falaschi, Mattia
name: Tenan, Simone
name: Ghielmi, Samuele
name: Laddaga, Lorenzo
name: Menegon, Michele
name: Delfino, Massimo
Publisher: name: Acta Herpetologica
Year: 2020

description: Recently described species suffer lack of information that hampers setting up appropriate conservation strategies. The situation is particularly complex with micro-endemic snakes, for which detection and monitoring are particularly challenging. The Walser viper Vipera walser is a recently described snake inhabiting a small area of the SW Italian alps. We combined information on species distribution with repeated monitoring to identify the areas most suitable for the species, and to obtain estimates of species abundance. Species distribution models were used to identify the topographical, climatic, and land-cover features related to the occurrence of vipers. Furthermore, repeated transects and N-mixture models were used to estimate abundance and to identify factors related to the variation of abundance. The available data suggested that the species has a disjunct range, with a Northern range of ~45 km2, and a southern range of ~225 km2. Distribution models suggested that vipers are associated with areas with open vegetation, altitude between 1300 and 2300 m, high precipitation, low forest cover, low slope, and southern aspect. N-mixture models confirmed very low detection probability of these vipers, and suggested that the species has a low abundance, with the highest abundance in south-facing plots. We provide the first quantitative information on habitats and abundance variation for Walser vipers. The broad confidence intervals of abundance estimates exemplify the complexity of providing range-wide measures of abundance for secretive species. Given the narrow range of these vipers, continuous monitoring is required to understand how they respond to ongoing environmental changes in mountainous areas.
description: Acta Herpetologica, Vol. 15 No. 2 (2020): Acta Herpetologica 15(2) 2020
Dynamical pinning of domain wall in magnetic nanowire induced by Walker breakdown
Creators: name: Tanigawa, Hironobu
name: Koyama, Tomohiro
name: Bartkowiak, Maciej
name: Kasai, Shinya
name: Kobayashi, Kensuke
name: Nakatani, Yoshinobu
name: Ono, Teruo
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Transmission probability of a domain wall through a magnetic nanowire is investigated as a function of the external magnetic field. Very intriguing phenomenon is found that the transmission probability shows a significant drop after exceeding the threshold driving field, which contradicts our intuition that a domain wall is more mobile in the higher magnetic field. The micromagnetics simulation reveals that the domain wall motion in the wire with finite roughness causes the dynamical pinning due to the Walker breakdown, which semi-quantitatively explains our experimental results.
description: 17 pages, 4 figures
Evolution of Anisotropy of Parton System from Relativistic Heavy-Ion Collisions
Creators: name: Jas, Weronika
name: Mrowczynski, Stanislaw
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Evolution of anisotropy in momentum and coordinate space of the parton system produced in relativistic heavy-ion collisions is discussed within the free-streaming approximation. The momentum distribution evolves from the prolate shape - elongated along the beam - to the oblate one - squeezed along the beam. At the same time the eccentricity in the coordinate space, which occurs at finite values of impact parameter, decreases. It is argued that the parton system reaches local thermodynamic equilibrium before the momentum distribution becomes oblate.
description: minor corrections, 7 pages, 8 figures, to appear in Phys. Rev. C
Anacroneuria embera Gutiérrez-Fonseca, 2015, sp. n.
Creators: name: Gutiérrez-Fonseca, Pablo E.
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Plecoptera
Perlidae
Anacroneuria
Anacroneuria embera

description: Anacroneuria embera, sp. n.
(Figs. 14–18)
 Material examined. Holotype ♂ (USNM). Panama: Darién, Darién National Park, field station near to the Perresenico stream, 8° 01' 10.41''N; 77° 44' 17.44'' W, 94 m asl, 17–22 November 2014, R. Salas, PE Gutiérrez Fonseca, light trap.
 Adult habitus. Head with dark pigment over ocelli, extending forward to M-line; antennae mostly brown. Median pronotal stripe yellow, midlateral stripes brown, margin yellow. Femora mostly yellow but with a dark apical band. Tibiae dark yellow. Wing membrane light brown, veins dark brown. Cerci yellow brownish (Fig. 14).
 Male. Forewing length 9 mm. Hammer thimble-shaped, height more than apical diameter (Fig. 15). Aedeagal apex simple, slender and truncate at tip, finger-shaped; shoulders project slightly, giving apex a trilobed appearance (Fig. 16). Lateral aspect of aedeagus with spoon-shaped tip (Fig. 17). Ventral membranous lobes small (Fig. 18). Dorsal keel small, triangular and extending to the shoulder. Hooks slender at base but stout in apical half.
 Female. Unknown.
 Nymph. Unknown.
 Etymology. The species name honors the Emberá people of Panama, native to the Darien area, and is used as a noun in apposition.
 Comments. This species resembles A. uatsi Stark 1998 known from Costa Rica and Honduras. However, A. uatsi has brown marginal pronotal stripes and lacks membranous ventral lobes of the aedeagus.
description: Published as part of Gutiérrez-Fonseca, Pablo E., 2015, Three new species of Anacroneuria Klapálek (Plecoptera: Perlidae) from Panama, pp. 69-76 in Zootaxa 3957 (3) on page 74, DOI: 10.11646/zootaxa.3957.1.5, http://zenodo.org/record/288562
Does chronic exposure to ammonium during the pre-metamorphic stages promote hindlimb abnormality in anuran metamorphs? A comparison between natural-habitat and agrosystem frogs
Creators: name: Zambrano-Fernández, Sonia
name: Zamora-Camacho, Francisco Javier
name: Aragón, Pedro
Publisher: name: Acta Herpetologica
Year: 2020

description: Despite their detrimental effects on locomotion, prevalence of hindlimb abnormalities is increasing in anuran populations worldwide. Among others, agrochemical pollution during the larval stage is a potential cause. However, populations exposed to such a strong selective pressure could evolve resistance. In this work, we examine the potential effects of chronic exposure to ammonium during the pre-metamorphic stages of Pelophylax perezi frogs on metamorph hindlimb abnormality prevalence, as compared with unpolluted-water-reared conspecifics. We conducted the experiment on tadpoles either from natural-habitat or from agrosystem parents. We detected no effect of chronic exposure to ammonium on hindlimb abnormality prevalence in frogs from either habitat, which suggests that the lack of effect detected is not related to resistance evolved in agrosystem frogs.
description: Acta Herpetologica, Vol. 15 No. 2 (2020): Acta Herpetologica 15(2) 2020
Faraday depolarization and induced circular polarization by multi-path propagation with application to FRBs
Creators: name: Beniamini, Paz
name: Kumar, Pawan
name: Narayan, Ramesh
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We describe how the observed polarization properties of an astronomical object are related to its intrinsic polarization properties and the finite temporal and spectral resolutions of the observing device. Moreover, we discuss the effect that a scattering screen, with non-zero magnetic field, between the source and observer has on the observed polarization properties. We show that the polarization properties are determined by the ratio of observing bandwidth and coherence bandwidth of the scattering screen and the ratio of temporal resolution of the instrument and the variability time of screen, as long as the length over which the Faraday rotation induced by the screen changes by $\simπ$ is smaller than the size of the screen visible to the observer. We describe the conditions under which a source that is 100\% linearly polarized intrinsically might be observed as partially depolarized, and how the source's temporal variability can be distinguished from the temporal variability induced by the scattering screen. In general, linearly polarized waves passing through a magnetized scattering screen can develop a significant circular polarization. We apply the work to the observed polarization properties of a few fast radio bursts (FRBs), and outline potential applications to pulsars.
description: 15 pages, 9 figures. Accepted for publication in MNRAS
Combined analysis of solar neutrino and solar irradiance data: further evidence for variability of the solar neutrino flux and its implications concerning the solar core
Creators: name: Sturrock, P. A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A search for any particular feature in any single solar neutrino dataset is unlikely to establish variability of the solar neutrino flux since the count rates are very low. It helps to combine datasets, and in this article we examine data from both the Homestake and GALLEX experiments. These show evidence of modulation with a frequency of 11.85 yr-1, which could be indicative of rotational modulation originating in the solar core. We find that precisely the same frequency is prominent in power spectrum analyses of the ACRIM irradiance data for both the Homestake and GALLEX time intervals. These results suggest that the solar core is inhomogeneous and rotates with sidereal frequency 12.85 yr-1. We find, by Monte Carlo calculations, that the probability that the neutrino data would by chance match the irradiance data in this way is only 2 parts in 10,000. This rotation rate is significantly lower than that of the inner radiative zone (13.97 yr-1) as recently inferred from analysis of Super-Kamiokande data, suggesting that there may be a second, inner tachocline separating the core from the radiative zone. This opens up the possibility that there may be an inner dynamo that could produce a strong internal magnetic field and a second solar cycle.
description: 22 pages, 9 tables, 10 figures
Efficacy and safety comparison of combination of 0.04% tretinoin microspheres plus 1% clindamycin versus their monotherapy in patients with acne vulgaris: a phase 3, randomized, double-blind study
Creators: name: Dogra, S.
name: Sumathy, T. K.
name: Nayak, C.
name: Ravichandran, G.
name: Vaidya, P. P.
name: Mehta, S.
name: Mittal, R.
name: Mane, A.
name: Charugulla, S. N.
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biochemistry
subject: Space Science
subject: Medicine
subject: Pharmacology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Cancer
subject: Science Policy

description: There is an unmet need for topical treatments with good tolerability in management of acne vulgaris. The present study aimed to evaluate efficacy and safety of a novel tretinoin (microsphere, 0.04%) formulation in combination with clindamycin (1%) gel for treatment of acne vulgaris. This phase 3 randomized, double-blind study included patients with moderate-to-severe acne. Patients were treated with tretinoin (microsphere, 0.04%) + clindamycin (1%) or one of the monotherapies (tretinoin, 0.025%; clindamycin, 1%). Key endpoints included percent change in lesion counts, and improvement in Investigator’s Static Global Assessment (ISGA) score. 750 patients were randomized (combination, n = 300; tretinoin and clindamycin, each n = 150). At week 12, reductions in inflammatory (77%), non-inflammatory (71%) and total lesions (73%) were significantly greater with combination treatment versus either monotherapy (p p The once-daily, microsphere-based formulation was generally tolerable with a positive impact on therapeutic outcomes and patients’ compliance. CTRI/2014/08/004830