cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Dunhevedia serrata Daday 1898
Creators: name: Gusakov, Vladimir A.
name: Dien, Tran Duc
name: Tran, Hoan Quoc
name: Thanh, Nguyen Thi Hai
name: Huan, Phan Trong
name: Ha, Vo Thi
name: Dinh, Cu Nguyen
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Branchiopoda
Anomopoda
Chydoridae
Dunhevedia
Dunhevedia serrata

description: 52. Dunhevedia serrata Daday, 1898
Localities and specimens found: 50 – 1♀; 81 – 1♀, 1♀ em, 3j.
Distribution and ecology. Dunhevedia serrata is distributed in the Ethiopian, Oriental and Australasian (New Guinea) regions (Rajapaksa & Fernando 1987b; Smirnov 1996; Smirnov & De Meester 1996; Kotov et al. 2013a). In the Oriental area, it is relatively common (Fernando 1974, 1980; Idris & Fernando 1981; Idris 1983; Michael & Sharma 1988; Sanoamuang 1998; Maiphae et al. 2005, 2008; Tanaka & Ohtaka 2010; Rane 2011; Chatterjee et al. 2013; Korovchinsky 2013; Kotov et al. 2013b; Van Damme et al. 2013; Sinev & Yusoff 2015, 2018; Lopez et al. 2017; Sharma & Sharma 2017; Tiang-nga et al. 2020; Padhye et al. 2023; Choedchim & Maiphae 2023), but there are still few records of this species in Vietnam (Sinev & Korovchinsky 2013; Gusakov et al. 2014; present study).
The lifestyle and ecology of this species are poorly studied. They are probably similar to those of the previous congener. Dunhevedia serrata is known mainly from permanent and temporary stagnant water bodies, including those vegetation-rich: lakes, reservoirs, floodplains, rice fields, ponds, swamps, mining pools, ditches (Idris 1983; Sinev & Korovchinsky 2013; Sinev & Yusoff 2015; Choedchim & Maiphae 2023). In our samples, several D. serrata specimens were found in a stagnant section of a forest stream and among the roots of water hyacinth in a floodplain lake (see Appendix 1).
description: Published as part of Gusakov, Vladimir A., Dien, Tran Duc, Tran, Hoan Quoc, Thanh, Nguyen Thi Hai, Huan, Phan Trong, Ha, Vo Thi & Dinh, Cu Nguyen, 2025, An annotated checklist of the main representatives of meiobenthos from inland water bodies of Central and Southern Vietnam. III. Water fleas (Cladocera), pp. 401-455 in Zootaxa 5613 (3) on page 427, DOI: 10.11646/zootaxa.5613.3.1, http://zenodo.org/record/15216705
Mixing angles of quarks and leptons in Quantum Field Theory
Creators: name: Duret, Quentin
name: Machet, Bruno
name: Vysotsky, M. I.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Arguments coming from Quantum Field Theory are supplemented with a 1-loop perturbative calculation to settle the non-unitarity of mixing matrices linking renormalized mass eigenstates to bare flavor states for non-degenerate coupled fermions. We simultaneously diagonalize the kinetic and mass terms and counterterms in the renormalized Lagrangian. SU(2)_L gauge invariance constrains the mixing matrix in charged currents of renormalized mass states, for example the Cabibbo matrix, to stay unitary. Leaving aside CP violation, we observe that the mixing angles exhibit, within experimental uncertainty, a very simple breaking pattern of SU(2)_f horizontal symmetry linked to the algebra of weak neutral currents, the origin of which presumably lies beyond the Standard Model. It concerns: on one hand, the three quark mixing angles; on the other hand, a neutrino-like pattern in which theta_{23} is maximal and tan(2 theta_{12})=2. The Cabibbo angle fulfills the condition tan (2 theta_c)=1/2 and theta_{12} for neutrinos satisfies accordingly the "quark-lepton complementarity condition" theta_c + theta_{12}= π/4. theta_{13} = +- 5.7 10^{-3} are the only values obtained for the third neutrino mixing angle that lie within present experimental bounds. Flavor symmetries, their breaking by a non-degenerate mass spectrum, and their entanglement with the gauge symmetry, are scrutinized; the special role of flavor rotations as a very mildly brokensymmetry of the Standard Model is outlined.
description: 45 pages, 6 figures
AC Power Flows and their Derivatives using Complex Matrix Notation and Cartesian Coordinate Voltages
Creators: name: Sereeter, Baljinnyam
name: Zimmerman, Ray D.
Publisher: name: Zenodo
Year: 2018
Subjects: power flow
optimal power flow

description: This document is a companion to MATPOWER Technical Note 2 and MATPOWER Technical Note 3. The purpose of these documents is to show how the AC power balance and flow equations used in power flow and optimal power flow computations can be expressed in terms of complex matrices, and how their first and second derivatives can be computed efficiently using complex sparse matrix manipulations. The relevant code in MATPOWER is based on the formulas found in these three notes.

MATPOWER Technical Note 2 presents a standard formulation based on complex power flows and nodal power balances using a polar representation of bus voltages, MATPOWER Technical Note 3 adds the formulas needed for nodal current balances, and this note presents versions of both based on a cartesian coordinate representation of bus voltages.
description: v2 – 2019-06-20
AC Power Flows and their Derivatives using Complex Matrix Notation and Cartesian Coordinate Voltages
Creators: name: Sereeter, Baljinnyam
name: Zimmerman, Ray D.
Publisher: name: Zenodo
Year: 2018
Subjects: power flow
optimal power flow

description: This document is a companion to MATPOWER Technical Note 2 and MATPOWER Technical Note 3. The purpose of these documents is to show how the AC power balance and flow equations used in power flow and optimal power flow computations can be expressed in terms of complex matrices, and how their first and second derivatives can be computed efficiently using complex sparse matrix manipulations. The relevant code in MATPOWER is based on the formulas found in these three notes.

MATPOWER Technical Note 2 presents a standard formulation based on complex power flows and nodal power balances using a polar representation of bus voltages, MATPOWER Technical Note 3 adds the formulas needed for nodal current balances, and this note presents versions of both based on a cartesian coordinate representation of bus voltages.
description: v1 – 2018-10-25
The Fragile Grid: The Physics and Economics of Security Services in Low-Carbon Power Systems (Slides)
Creators: Pierluigi Mancarella
Publisher: name: IEEE
Year: 2021

Low-carbon grids are characterized by substantial renewable energy sources, both centralized and distributed, combined with intelligent and dynamic demand-side technology and multi-sector electrification (including heating, transport, and future fuels). In this context, successfully resolving the “affordability-sustainability-reliability” energy trilemma is crucial to paving the way to low-carbon energy futures. However, when looking at the “reliability” pillar of the trilemma, it becomes apparent that these transformations are of unprecedented scale and pose significant threats to operational security.
Due to changes in the physical characteristics of the system and the supply-side and demand-side resources connected to the system, low-carbon grids might be intrinsically more “fragile” and therefore both less secure and less resilient. The system’s “new physics” has a profound impact on its economics, too, in the requirements for security services and the ways they are procured, so that suitable technical, commercial, regulatory, and policy measures need to be put in place coherently.
This webinar discusses in great detail all these aspects, with several recent real-world examples from Australia, the UK, and Texas.
Low-carbon grids are characterized by substantial renewable energy sources, both centralized and distributed, combined with intelligent and dynamic demand-side technology and multi-sector electrification (including heating, transport, and future fuels). In this context, successfully resolving the “affordability-sustainability-reliability” energy trilemma is crucial to paving the way to low-carbon energy futures. However, when looking at the “reliability” pillar of the trilemma, it becomes apparent that these transformations are of unprecedented scale and pose significant threats to operational security.
Due to changes in the physical characteristics of the system and the supply-side and demand-side resources connected to the system, low-carbon grids might be intrinsically more “fragile” and therefore both less secure and less resilient. The system’s “new physics” has a profound impact on its economics, too, in the requirements for security services and the ways they are procured, so that suitable technical, commercial, regulatory, and policy measures need to be put in place coherently.
This webinar discusses in great detail all these aspects, with several recent real-world examples from Australia, the UK, and Texas.
Logarithmic growth law in the two-dimensional Ising spin glass state resulting from the electron doping in single-layered manganites
Creators: name: Mathieu, R.
name: He, J. P.
name: Kaneko, Y.
name: Yoshino, H.
name: Asamitsu, A.
name: Tokura, Y.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The ac-susceptibility of the electron doped single-layered manganite La$_{1.1}$Sr$_{0.9}$MnO$_4$ is analyzed in detail. A quasi two-dimensional (2$D$) antiferromagnetic (AFM) order with Ising anisotropy is stabilized below $T_N$ $\sim$ 80K. We show that below $T_N$, a rare 2$D$ spin-glass (SG) correlation develops with the same Ising anisotropy as the AFM state. Using simple scaling arguments of the droplet model, we derive a scaling form for the ac-susceptibility data of a 2$D$ SG, which our experimental data follows fairly well. Due to simplifications in this 2$D$ case, the proposed scaling form only contains two unknown variables $ψν$ and $τ_0$. Hence, the logarithmic growth law of the SG correlation predicted by the droplet model is convincingly evidenced by the scaling of our experimental data. The origin and nature of this 2$D$ SG state is also discussed.
description: REVTeX 4 style; 5 pages, 4 figures
Slides for - Empirical Wavelets
Creators: Dr. Jerome Gilles
Publisher: name: IEEE
Year: 2021

Webinar Slides - October 29, 2021, Dr. Jerome Gilles
Adaptive (i.e., data-driven) methods have become very popular these last decades. Among the existing techniques, the empirical mode decomposition has proven to be very efficient in extracting accurate time-frequency information from non-stationary signals.

However, it is a purely algorithmic method and lacks of solid theoretical foundations. To overcome this issue, we propose the construction of adaptive wavelets, called empirical wavelets. Their aim is to decompose a signal into its harmonic modes (i.e., amplitude modulated frequency modulated constituents).

To reach this goal, we first detect the position of the wavelet supports in the Fourier domain by analyzing the signal spectrum, and then we build the corresponding wavelet filter bank. The transform is simply obtained by multiplication in the Fourier domain. We extend this idea to the 2D case for image processing by considering different types of classic Fourier partitions (tensor, Littlewood-Paley, curvelets, . . .).
Finally, we propose a method, based on the Watershed transform, to create empirical wavelets on completely arbitrary supports. We explore some theoretical properties of the empirical wavelets in the continuous case and illustrate their efficiency in texture segmentation tasks.
Titanoderma pustulatum Nageli 1858
Creators: name: Dey, Rikee
name: Basso, Daniela
name: Chakraborty, Arindam
name: Roy, Lopamudra
name: Bhaumik, Ajoy Kumar
name: Ghosh, Amit K.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Plantae
Rhodophyta
Florideophyceae
Corallinales
Lithophyllaceae
Titanoderma
Titanoderma pustulatum

description: Titanoderma pustulatum (Lamouroux) Nägeli, 1858
(Fig. 4F)
Melobesia pustulata Lamouroux, 1816: 315.
Titanoderma pustulatum (Lamouroux) Nägeli, 1858: 532.
DESCRIPTION
Encrusting growth form, thallus dimerous, dorsiventral. Cells of VC 12 to 18 µm in length and 8 to 15 µm in diameter, palisade-like. Cells of PF are more or less squarish to rectangular, measuring 7 to 18 µm in length and 8 to 16 µm in diameter. Cell fusions occurring both in VC and PF.Epithallial cells are poorly preserved. Conceptacles uniporate, rose above the thallus surface, with chambers appearing hemispherical to elongated in section. Conceptacle chambers measure 110 to 140 µm in diameter and 72 to 94 µm in height (Table 1).
REMARKS
This non-endophytic species of Titanoderma shows the growthform, size and shape of the conceptacle chamber and pore canal, conceptacle roof and thickness of the thallus that resemble Titanoderma pustulatum, as described by previous authors (Chamberlain & Irvine 1994; Harvey et al. 2009; Van Der Merwe & Maneveldt 2015). The oldest record of T.pustulatum is from the early Oligocene of Iran (Basso et al. 2019) (Table 2).
description: Published as part of Dey, Rikee, Basso, Daniela, Chakraborty, Arindam, Roy, Lopamudra, Bhaumik, Ajoy Kumar & Ghosh, Amit K., 2023, Rhodolith-forming coralline red algae in the CaCO biofactory - A case study from the Serravallian of tropical northeastern Indian Ocean, pp. 541-567 in Comptes Rendus Palevol 22 (26) on pages 548-549, DOI: 10.5852/cr-palevol2023v22a26, http://zenodo.org/record/14224623
AC Power Flows, Generalized OPF Costs and their Derivatives using Complex Matrix Notation
Creators: name: Zimmerman, Ray D.
Publisher: name: Zenodo
Year: 2010
Subjects: power flow
optimal power flow

description: The purpose of this document is to show how the AC power balance and flow equations used in power flow and optimal power flow computations can be expressed in terms of complex matrices, and how their first and second derivatives can be computed efficiently using complex sparse matrix manipulations. Similarly, the derivatives of the generalized AC OPF cost function used by MATPOWER and the corresponding OPF Lagrangian function are developed. The relevant code in MATPOWER is based on the formulas found in this note, in which nodal balances are expressed in terms of complex power and voltages are represented in polar coordinates, and in the companion MATPOWER Technical Note 3 and MATPOWER Technical Note 4, which present formulas for variations based on nodal current balances and cartesian coordinate voltages, respectively.
description: v6 – 2019-06-03
Additional file 1 of Spatio-temporal patterns of the Red-footed Falcon’s hunting behavior during the nestling period suggest ad hoc conservation policies
Creators: name: Gustin, Marco
name: Ferrarini, Alessandro
Publisher: name: figshare
Year: 2021
Subjects: subject: Ecology
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Science Policy
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Additional file 1: Figure S1. Two details of the study area (northern portion of the province of Parma, Italy). Figure S2. The rows of Black Poplar (Populus nigra) and Oak (Quercus robur) trees that host the Red-footed Falcons’ colonies A and B. Figure S3. The rows of trees present in the study area. Figure S4. Hunting/perching activity occurred in the close surroundings of the rows of trees where nests are located.
Amphiroa undetermined
Creators: name: Dey, Rikee
name: Basso, Daniela
name: Chakraborty, Arindam
name: Roy, Lopamudra
name: Bhaumik, Ajoy Kumar
name: Ghosh, Amit K.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Plantae
Rhodophyta
Florideophyceae
Corallinales
Lithophyllaceae
Amphiroa
Amphiroa undetermined

description: Amphiroa sp.
(Fig. 4 G-J)
DESCRIPTION
The intergenicular segments measure 651 to 1109 µm in length and 256 to 338 µm in diameter. Core region is composed of 3 to 6 layers of long cells alternating with 1 to 2 layers of short cells. Peripheral region not observed. Long cells measure 50 to 90 µm in length and 8 to 20 µm in diameter, short cells are 16 to 40 µm in length and 9 to 19 µm in diameter. Conceptacles are not preserved (Table 1).
REMARKS
The species of Amphiroa described herein is comparable to Amphiroa fragilissima (Linnaeus) Lamouroux illustrated by Johnson (1957) from the Pleistocene of Mariana limestone, Saipan. The characteristic features of A. fragilissima as defined by Johnson (1957) are the core region comprises of 3 to 6 layers of long cells alternating with 1 to 2 layers of short cells. However, the specimens described here show larger size of both long and short cells are. Moreover, owing to lack of preservation of conceptacles, the presently described form is not assignable to any known species of the genus.
description: Published as part of Dey, Rikee, Basso, Daniela, Chakraborty, Arindam, Roy, Lopamudra, Bhaumik, Ajoy Kumar & Ghosh, Amit K., 2023, Rhodolith-forming coralline red algae in the CaCO biofactory - A case study from the Serravallian of tropical northeastern Indian Ocean, pp. 541-567 in Comptes Rendus Palevol 22 (26) on page 551, DOI: 10.5852/cr-palevol2023v22a26, http://zenodo.org/record/14224623
A-unital Operations and Quantum Conditional Entropy
Creators: name: Vempati, Mahathi
name: Shah, Saumya
name: Ganguly, Nirman
name: Chakrabarty, Indranil
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Negative quantum conditional entropy states are key ingredients for information theoretic tasks such as superdense coding, state merging and one-way entanglement distillation. In this work, we ask: how does one detect if a channel is useful in preparing negative conditional entropy states? We answer this question by introducing the class of A-unital channels, which we show are the largest class of conditional entropy non-decreasing channels. We also prove that A-unital channels are precisely the completely free operations for the class of states with non-negative conditional entropy. Furthermore, we study the relationship between A-unital channels and other classes of channels pertinent to the resource theory of entanglement. We then prove similar results for ACVENN: a previously defined, relevant class of states and also relate the maximum and minimum conditional entropy of a state with its von Neumann entropy. The definition of A-unital channels naturally lends itself to a procedure for determining membership of channels in this class. Thus, our work is valuable for the detection of resourceful channels in the context of conditional entropy.
description: Accepted for publication in Quantum journal (https://quantum-journal.org/). See also the related independent work by Brandsen et. al. at arXiv:2110.15330
Boundedness of Fourier integral operators on Fourier Lebesgue spaces and affine fibrations
Creators: name: Nicola, Fabio
Publisher: name: arXiv
Year: 2008
Subjects: subject: Functional Analysis (math.FA)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35S30, 42B35

description: We carry on the study of Fourier integral operators of H{ö}rmander's type acting on the spaces $(\mathcal{F}L^p)_{comp}$, $1\leq p\leq\infty$, of compactly supported distributions whose Fourier transform is in $L^p$. We show that the sharp loss of derivatives for such an operator to be bounded on these spaces is related to the rank $r$ of the Hessian of the phase $Φ(x,η)$ with respect to the space variables $x$. Indeed, we show that operators of order $m=-r|1/2-1/p|$ are bounded on $(\mathcal{F}L^p)_{comp}$, if the mapping $x\longmapsto\nabla_xΦ(x,η)$ is constant on the fibers, of codimension $r$, of an affine fibration.
description: 13 pages
October -Climate-change Caused Blackouts - The Role of Smart Grid Applications
Creators: Hao Zhu and Robert Hebner
Soham Ghosh
Anuradha M. Annaswamy
Swochchhanda Shrestha
and Rabab Haider
Hossam Gaber
Publisher: name: IEEE
Year: 2021

Newsletter
An issue of the Smart Grid eNewsletter on Climate-change Caused Blackouts - The Role of Smart Grid Applications featuring "Grid-edge resources can be resiliency game changer," "Ensuring Energy Security: The Role of Smart-Grid in Climate-Change Adaptation," "FERC Order 2222 – What does it mean for DERs?" and "Smart Energy and Transitioning of Community Infrastructures and Applications"
Non-response
Creators: name: Sikveland, Rein Ove
Publisher: name: OSF
Year: 2022
Subjects: Conversation Analysis
Encyclopedia
Ethnomethodology
Interactional Linguistics

description: A non-response is the absence of a response, in a post-first sequential environment where a responsive action is relevant. As a social action, a non-response fails to embody or favor the further accomplishment of the first action (see, e.g., Schegloff 2007). A response may be interactionally marked as absent in subsequent turns with a pursuit for response or initiation of repair.
Stars and gas in the Medusa merger
Creators: name: Manthey, E.
name: Huettemeister, S.
name: Aalto, S.
name: Horellou, C.
name: Bjerkeli, P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The Medusa (NGC 4194) is a well-studied nearby galaxy with the disturbed appearance of a merger and evidence for ongoing star formation. In order to test whether it could be the result of an interaction between a gas-rich disk-like galaxy and a larger elliptical, we have carried out optical and radio observations of the stars and the gas in the Medusa, and performed $N$-body numerical simulations of the evolution of such a system. We used the Nordic Optical Telescope to obtain a deep V-band image and the Westerbork Radio Synthesis Telescope to map the large-scale distribution and kinematics of atomic hydrogen. A single HI tail was found to the South of the Medusa with a projected length of 56 kpc (5') and a gas mass of 7* 10^8 M_sun, thus harbouring about one third of the total HI mass of the system. HI was also detected in absorption toward the continuum in the center. HI was detected in a small nearby galaxy to the North-West of the Medusa at a projected distance of 91 kpc. It is, however, unlikely that this galaxy has had a significant influence on the evolution of the Medusa. The simulations of the slightly prograde infall of a gas-rich disk galaxy on an larger, four time more massive elliptical (spherical) galaxy reproduce most of the observed features of the Medusa.Thus, the Medusa is an ideal object to study the merger-induced star formation contribution from the small galaxy of a minor merger.
description: accepted by A&A, 16 pages, movies of the simulations can be found at http://www.bjerkeli.se/
A psychological analysis of the concept of wisdom
Creators: name: Holliday, Stephen George
Publisher: name: University of British Columbia
Year: 2010

description: The purpose of this project was to provide a psychologically based analysis of the concept of wisdom. Although wisdom has long been used to label competent people, psychologists have largely ignored wisdom in favour of such variables as intelligence. This study used a prototype analysis procedure to identify the attributes that characterize wise people together with the descriptors for intelligent, perceptive and other types of individuals. This served as a basis for describing wisdom and differentiating it from other competency descriptors. The study also examined generational differences in conceptions of wisdom and assessed the manner in which the prototype for wisdom influenced information processing. The project was divided into three studies. In Study I, groups of fifty young adults, middle aged adults and elderly adults provided descriptions of wise, intelligent and other types of individuals. In Study II, groups of subjects representing the same age cohorts rated the descriptors for wise people. An additional group of subjects rated descriptors associated with other categories. In Study III, thirty-eight young adults were administered a recognition memory task to assess the biasing effects of prototype descriptors. The results of Studies I and II indicated that wisdom is a well-defined, prototypically organized concept. Reliability analyses indicated within and between cohort agreement on the characteristics of wise people. Examination of overlap between categories indicated that wisdom was largely independent of other competency descriptors. A principal components analysis yielded five factors, which were labelled "Exceptional Understanding," "Judgement and Communication Skills," "Basic Competency," "Interpersonal Skills," and "Social Unobtrusiveness." The results of Study III indicated that people's memory processes were influenced by the prototypes of wise people. The evidence from Studies I, II and III suggest that wisdom may be viewed as a prototypically organized concept. These results both replicate previous studies and provide a more complete picture of the characteristics and abilities of wise people. The results are interpreted within a theory of development which emphasizes several factors that may contribute to the emergence of wisdom.
Additional file 2 of Spatio-temporal patterns of the Red-footed Falcon’s hunting behavior during the nestling period suggest ad hoc conservation policies
Creators: name: Gustin, Marco
name: Ferrarini, Alessandro
Publisher: name: figshare
Year: 2021
Subjects: subject: Ecology
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Science Policy
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: Additional file 2: Table S1. Description of the tracked Red-footed Falcons. Table S2. Temporal pattern of the Red-footed Falcons’ hovering/perching activity. Table S3. Spatial pattern of the Red-footed Falcons’ hunting activity in June, July and during the whole monitoring period.
Relativistic second-order dissipative hydrodynamics from Zubarev's non-equilibrium statistical operator
Creators: name: Harutyunyan, Arus
name: Sedrakian, Armen
name: Rischke, Dirk H.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present a new derivation of relativistic second-order dissipative hydrodynamics for quantum systems using Zubarev's non-equilibrium statistical-operator formalism. This is achieved by a systematic expansion of the energy-momentum tensor and the charge current to second order in deviations from equilibrium. As a concrete example, we obtain the relaxation equations for the shear-stress tensor, the bulk-viscous pressure, and the charge-diffusion currents required to close the set of equations of motion for relativistic second-order dissipative hydrodynamics. We also identify new transport coefficients which describe the relaxation of dissipative processes to second order and express them in terms of equilibrium correlation functions, thus establishing new Kubo-type formulas for second-order transport coefficients.
description: 54 pages
A Survey on Channel Estimation and Practical Passive Beamforming Design for Intelligent Reflecting Surface Aided Wireless Communications
Creators: name: Zheng, Beixiong
name: You, Changsheng
name: Mei, Weidong
name: Zhang, Rui
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Theory (cs.IT)
subject: Emerging Technologies (cs.ET)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Intelligent reflecting surface (IRS) has emerged as a key enabling technology to realize smart and reconfigurable radio environment for wireless communications, by digitally controlling the signal reflection via a large number of passive reflecting elements in real-time. Different from conventional wireless communication techniques that only adapt to but have no or limited control over dynamic wireless channels, IRS provides a new and cost-effective means to combat the wireless channel impairments in a proactive manner. However, despite its great potential, IRS faces new and unique challenges in its efficient integration into wireless communication systems, especially its channel estimation and passive beamforming design under various practical hardware constraints. In this paper, we provide a comprehensive survey on the up-to-date research in IRS-aided wireless communications, with an emphasis on the promising solutions to tackle practical design issues. Furthermore, we discuss new and emerging IRS architectures and applications as well as their practical design problems to motivate future research.
description: Accepted by IEEE Communications Surveys and Tutorials (76 pages, 17 figures, and 10 tables). In this paper, we provide a comprehensive survey on the up-to-date research in IRS-aided wireless communications, with an emphasis on the promising solutions to tackle practical design issues
Generalized Formulation of Steady-State Equivalent Circuit Models of Grid-Forming Inverters
Creators: Vinicius C. Cunha
Taehyung Kim
Nicholas Barry
Piyapath Siratarnsophon
Surya Santoso
Walmir Freitas
Deepak Ramasubramanian
and Roger C. Dugan
Publisher: name: IEEE
Year: 2021

This work proposes positive- and negative-sequence equivalent circuits of grid-forming inverters for steady-state analysis.
This work proposes positive- and negative-sequence equivalent circuits of grid-forming inverters for steady-state analysis. The proposed models are especially attractive for performing long-duration voltage regulation analysis and short-circuit studies involving grid-forming inverters. Our proposed equivalent circuit models are based on the inverter's voltage and current control loops in the αβ and dq frames. For this reason, they operate according to prescribed control functions and specified impedances (i.e., filter impedance, current limiter block, virtual admittance block, and PI/PR controller block). The equivalent circuit model accuracy is validated by comparing system steady-state voltage and current responses obtained by detailed time-domain models in PSCAD/EMTDC to those by the equivalent circuit models implemented in steady-state load flow program (e.g., OpenDSS). Two distinct control structures implemented in the αβ and dq frames are used for the validation. Single line-to-ground and line-to-line-to-ground faults are simulated in a small islanded microgrid as well as the IEEE 34-node test feeder. Fault impedances varying from 0 to 5 ohms are simulated. We show that the equivalent models precisely replicate the steady-state response of the detailed time-domain models.
Detection of broad 21-cm absorption at z = 0.656 in the complex sight-line towards 3C336
Creators: name: Curran, S. J.
name: Tzanavaris, P.
name: Murphy, M. T.
name: Webb, J. K.
name: Pihlstroem, Y. M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report the detection of 21-cm absorption at z = 0.656 towards 1622+238 (3C336). The line is very broad with a Full-Width Half Maximum (FWHM) of 235 km/s, giving a velocity integrated optical depth of 2.2 km/s. The centroid of the line is offset from that of the known damped Lyman-alpha absorption (DLA) system by 50 km/s, and if the Lyman-alpha and 21-cm absorption are due to the same gas, we derive a spin temperature of < 60 K, which would be the lowest yet in a DLA. The wide profile, which is over four times wider than that of any other DLA, supports the hypothesis that the hydrogen absorption is occurring either in the disk of a large underluminous spiral or a group of dim unidentified galaxies, associated with the single object which has been optically identified at this redshift.
description: 5 pages, 3 figures, accepted by MNRAS Letters
Additional file 1 of Promoting the propensity for blood donation through the understanding of its determinants
Creators: name: Mugion, Roberta Guglielmetti
name: Pasca, Maria Giovina
name: Pietro, Laura Di Di
name: Renzi, Maria Francesca
Publisher: name: figshare
Year: 2021
Subjects: subject: Cell Biology
subject: Sociology
subject: FOS: Sociology
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Science Policy
subject: Plasma Physics
subject: Hematology

description: Additional file 1.
Does the complex deformation of the Riemann equation exhibit shocks?
Creators: name: Bender, Carl M.
name: Feinberg, Joshua
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Other Condensed Matter (cond-mat.other)
subject: Mathematical Physics (math-ph)
subject: Pattern Formation and Solitons (nlin.PS)
subject: Fluid Dynamics (physics.flu-dyn)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The Riemann equation $u_t+uu_x=0$, which describes a one-dimensional accelerationless perfect fluid, possesses solutions that typically develop shocks in a finite time. This equation is $\cP\cT$ symmetric. A one-parameter $\cP\cT$-invariant complex deformation of this equation, $u_t-iu(iu_x)^ε= 0$ ($ε$ real), is solved exactly using the method of characteristic strips, and it is shown that for real initial conditions, shocks cannot develop unless $ε$ is an odd integer.
description: latex, 8 pages
Complexity of Scalar Collapse in Anti-de Sitter Spacetime
Creators: name: Frey, Andrew R.
name: Grehan, Michael P.
name: Srivastava, Manu
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We calculate the volume and action forms of holographic complexity for the gravitational collapse of scalar field matter in asymptotically anti-de Sitter spacetime, using numerical methods to reproduce the geometry responding to the oscillating field over multiple crossing times. Like the scalar field pulse, the volume complexity oscillates quasiperiodically before horizon formation. It also shows a scaling symmetry with the amplitude of the scalar field. The action complexity is also quasiperiodic with spikes of increasing amplitude.
description: 19pp; v2. added references, short discussion of Lloyd's bound for CV; v3. added discussion w/2 figs on complexity-momentum correspondence, minor clarifications; v4. typo corrections including to eqn (4.3), matches published version in content
Understanding the Very High-Energy Emission from Microquasars
Creators: name: Bosch-Ramon, Valenti
name: Khangulyan, Dmitry
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Microquasars are X-ray binaries with relativistic jets. These jets are powerful energy carriers, thought to be fed by accretion, which produce non-thermal emission at different energy bands. To date, several Galactic sources showing extended radio emission, among them at least one confirmed microquasar, Cygnus X-1, have been detected in the TeV range. All of them show complex patterns of spectral and temporal behavior. In this work, we discuss the physics behind the very high-energy emission in microquasars. In concrete, we focus on the microquasar Cygnus X-1, and also in the other two TeV binaries with detected extended outflows, LS 5039 and LS I +61 303, pointing out relevant aspects of the complex phenomena occurring in them. We conclude that the TeV emission is likely of leptonic origin, although hadrons cannot be discarded. In addition, efficient electromagnetic cascades can hardly develop since even relatively low magnetic fields suppress them. Also, the modeling of the radiation from some of the detected sources points to them as either extremely efficient accelerators, and/or having the TeV emitter at a distance from the compact object of about 10e12 cm. Finally, we point out that the role of a massive and hot stellar companion, due to its strong photon field and wind, cannot be neglected when trying to understand the behavior of microquasars at high and very high energies. The complexity of microquasars precludes straightforward generalizations to a whole population, and are better studied presently in a source by source base.
description: 41 pages, 18 figures, invited review for the International Journal of Modern Physics D
Reaction cross sections for proton scattering from stable and unstable nuclei based on a microscopic approach
Creators: name: Arellano, H. F.
name: Girod, M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Microscopic optical model potential results for reaction cross sections of proton elastic scattering are presented. The applications cover the 10-1000 MeV energy range and consider both stable and unstable nuclei. The study is based on in-medium g-matrix full-folding optical model approach with the appropriate relativistic kinematic corrections needed for the higher energy applications. The effective interactions are based on realistic NN potentials supplemented with a separable non-Hermitian term to allow optimum agreement with current NN phase-shift analyzes, particularly the inelasticities above pion production threshold. The target ground-state densities are obtained from Hartree-Fock-Bogoliubov calculations based on the finite range, density dependent Gogny force. The evaluated reaction cross sections for proton scattering are compared with measurements and their systematics is analyzed. A simple function of the total cross sections in terms of the atomic mass number is observed at high energies. At low energies, however, discrepancies with the available data are observed, being more pronounced in the lighter systems.
description: 11 pages, 4 figures, submitted to Phys. Rev. C
Measuring the mass function of isolated stellar remnants with gravitational microlensing. I. Revisiting the OGLE-III dark lens candidates
Creators: name: Mroz, P.
name: Wyrzykowski, L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Gravitational microlensing may detect dark stellar remnants - black holes or neutron stars - even if they are isolated. However, it is challenging to estimate masses of isolated dark stellar remnants using solely photometric data for microlensing events. A recent analysis of OGLE-III long-timescale microlensing events exhibiting the annual parallax effects claimed that a number of bright events were due to "mass-gap" objects (with masses intermediate between those of neutron stars and black holes). Here, we present a detailed description of the updated and corrected method that can be used to estimate masses of dark stellar remnants detected in microlensing events given the light curve data and the proper motion of the source. We use this updated method, in combination with new proper motions from Gaia EDR3, to revise masses of dark remnant candidates previously found in the OGLE-III data. We demonstrate that masses of "mass-gap" and black hole events identified in the previous work are overestimated and, hence, these objects are most likely main-sequence stars, white dwarfs, or neutron stars.
description: submitted
Generalised parton distributions from the off-forward Compton amplitude in lattice QCD
Creators: name: Hannaford-Gunn, Alec
name: Can, Kadir Utku
name: Horsley, Roger
name: Nakamura, Yoshifumi
name: Perlt, Holger
name: Rakow, Paul E. L.
name: Stüben, Hinnerk
name: Schierholz, Gerrit
name: Young, Ross D.
name: Zanotti, James M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We determine the properties of generalised parton distributions (GPDs) from a lattice QCD calculation of the off-forward Compton amplitude (OFCA). By extending the Feynman-Hellmann relation to second-order matrix elements at off-forward kinematics, this amplitude can be calculated from lattice propagators computed in the presence of a background field. Using an operator product expansion, we show that the deeply-virtual part of the OFCA can be parameterised in terms of the low-order Mellin moments of the GPDs. We apply this formalism to a numerical investigation for zero-skewness kinematics at two values of the soft momentum transfer, $t = -1.1, -2.2 \;\text{GeV}^2$, and a pion mass of $m_π\approx 470\;\text{MeV}$. The form factors of the lowest two moments of the nucleon GPDs are determined, including the first lattice QCD determination of the $n=4$ moments. Hence we demonstrate the viability of this method to calculate the OFCA from first principles, and thereby provide novel constraint on the $x$- and $t$-dependence of GPDs.
description: 20 pages, 7 figures
A Photometric Survey for Variables and Transits in the Field of Praesepe with KELT
Creators: name: Pepper, Joshua
name: Stanek, K. Z.
name: Pogge, Richard W.
name: Latham, David W.
name: DePoy, D. L.
name: Siverd, Robert
name: Poindexter, Shawn
name: Sivakoff, Gregory R.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The Kilodegree Extremely Little Telescope (KELT) project is a small aperture, wide-angle search for planetary transits of solar-type stars. In this paper, we present the results of a commissioning campaign with the KELT telescope to observe the open cluster Praesepe for 34 nights in early 2005. Lightcurves were obtained for 69,337 stars, out of which we identify 58 long period variables and 152 periodic variables. Sixteen of these are previously known as variable, yielding 194 newly discovered variable stars for which we provide properties and lightcurves. We also searched for planetary-like transits, finding four transit candidates. Follow-up observations indicate that two of the candidates are astrophysical false positives, with two candidates remaining as potential planetary transits.
description: 45 pages, 16 figures. Submitted to AJ. PDF version with full resolution figures located at http://www.astronomy.ohio-state.edu/~pepper/kelt.pdf
Monopoly relations in the Canadian state, 1939-1957 : (How the coordinative and recuperative functions peculiar to the monopoly state became established in the Canadian civil service
Creators: name: James, Hugh Mackenzie
Publisher: name: University of British Columbia
Year: 2010

description: In this thesis a theory of monopoly capitalism, and particularly of the recuperative functions of the monopoly state, is presented. It is suggested that this theory throws significant light on the marked transformations which occurred in the Canadian Civil Service between 1939 and 1957. It is hypothesized that the Canadian state undertook what has been defined as 'monopoly functions' during this period. The argument is supported by an analysis of the institutional structure of the wartime and postwar Civil Service - examining the administrative hierarchy, the range of institutional contradictions, and the radically altered relation of the state to the private economy. The theory of monopoly capital employed in this thesis follows from a tradition of Marxist debate, but places peculiar emphasis on the distinction between the production of means of production (DI) and the production of means of consumption (DII). The production of the means of production would include particularly the capital goods sector and the large infrastructural networks supportive of national industry. The production of the means of consumption would include the 'necessaries of life' required to support the direct producers - both durable and non-durable consumer goods. It is argued that the relationship of the state to each of these two sectors is of a different character and significance - a position not generally held. Another important concept highlighted is that of the "work of coordination and unity," which is used to weld the theory of the monopoly economy to a few central hypotheses concerning the monopoly state itself and forms of monopoly state intervention. It is suggested that the particular structural ambivalences, institutional rivalries, and patterns of institutional growth which are characteristic of the postwar Canadian state can be explained, in their mutual relation, by the principal hypotheses of the theory of the monopoly role of the state. The connections which have been brought to light in this research are most revealing. Not only do individual circumstances "measure" against precepts of the theory, but main lines of development which occurred simultaneously in different parts of the Civil Service are seen to stand in a highly suggestive relation to one another when viewed from this perspective. Pivotal to the development of this argument is a review of the historical bases of the wartime/postwar state, and the establishment of a measure of comparison by which to gauge the extent and direction of institutional change between 1939 and 1957.
XMM-Newton observations of the low-mass X-ray binary XB1832-330 in the galactic globular cluster NGC 6652
Creators: name: Sidoli, L.
name: La Palombara, N.
name: Oosterbroek, T.
name: Parmar, A. N.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report on two XMM-Newton observations performed in 2006 of the luminous low-mass X-ray binary XB1832-330 which is located in the galactic globular cluster NGC 6652 and is probably an ultracompact binary (orbital period less than 1 hour). The aim of these observations is to investigate the low-energy absorption towards NGC6652 and in particular to search for Ne-rich material local to the binary, which has been suggested as a possible spectral signature of Neon rich degenerate companions. XMM-Newton observed the source twice, in 2006 September and October. High resolution spectroscopy with the RGS was used to estimate the ratio of the neutral neon to oxygen column densities to search for an anomalous Ne abundance in this X-ray binary. We find no evidence for anomalous Ne/O ratios, finding Ne/O=0.18+/-0.06 and Ne/O=0.17+/-0.03 (1 sigma uncertainties), in the two observations, respectively. These values are consistent with that in the interstellar medium. Timing analysis of EPIC data suggests possible periodicities at 9170+/-235 s and 18616 +/- 531 s, which need confirmation. A by-product of these observations consists of the spatial analysis of the source field, which resulted in the detection of 46 faint sources within the EPIC field of view, which are not present in the Second XMM-Newton Serendipitous Source Catalogue. All these faint sources are likely foreground objects. We performed the first high spectral resolution observations of XB1832-33, a probable ultracompact binary, without finding any evidence for an anomalous Ne abundance.
description: Accepted for publication in A&A