cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
On the category of finite-dimensional representations of $\OSPrn$: Part I
Creators: name: Ehrig, Michael
name: Stroppel, Catharina
Publisher: name: arXiv
Year: 2016
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 17B10, 16S37, 16D50, 17B20

description: We study the combinatorics of the category F of finite-dimensional modules for the orthosymplectic Lie supergroup OSP(r|2n). In particular we present a positive counting formula for the dimension of the space of homomorphism between two projective modules. This refines earlier results of Gruson and Serganova. Moreover, for each block B of F we construct an algebra A(B) whose module category shares the combinatorics with B. It arises as a subquotient of a suitable limit of type D Khovanov algebras. It will turn out that A(B) is isomorphic to the endomorphism algebra of a minimal projective generator of B. This provides a direct link from F to parabolic categories O of type B or D, with maximal parabolic of type A, to the geometry of isotropic Grassmannians of types B/D and to Springer fibres of types C/D. We also indicate why F is not highest weight in general.
Do Water Fountain Jets Really Indicate the Onset of the Morphological Metamorphosis of Circumstellar Envelopes?
Creators: name: Yung, Bosco H. K.
name: Nakashima, Jun-ichi
name: Hsia, Chih-Hao
name: Imai, Hiroshi
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The small-scale bipolar jets having short dynamical ages from "water fountain (WF)" sources are regarded as an indication of the onset of circumstellar envelope morphological metamorphosis of intermediate-mass stars. Such process usually happens at the end of the asymptotic giant branch (AGB) phase. However, recent studies found that WFs could be AGB stars or even early planetary nebulae. This fact prompted the idea that WFs may not necessarily be objects at the beginning of the morphological transition process. In the present work, we show that WFs could have different envelope morphologies by studying their spectral energy distribution profiles. Some WFs have spherical envelopes that resembles usual AGB stars, while others have aspherical envelopes which are more common to post-AGB stars. The results imply that WFs may not represent the earliest stage of the morphological metamorphosis. We further argue that the dynamical age of a WF jet, which can be calculated from maser proper motions, may not be the real age of the jet. The dynamical age cannot be used to justify the moment when the envelope begins to become aspherical, nor to tell the concrete evolutionary status of the object. A WF jet could be the innermost part of a larger well-developed jet, which is not necessarily a young jet.
description: 21 pages, 4 figures, accepted for publication in MNRAS
Extending the OSLC standard for ECA-based automation in DevOps environments
Creators: name: García-Grao, Guillermo
name: Carrera, Álvaro
Publisher: name: arXiv
Year: 2022
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: The DevOps paradigm is taking over software development systems, helping businesses increase efficiency, accelerate production, and adapt quickly to market changes. However, adopting these principles can be challenging. Practitioners often face an important issue known as vendor lock-in caused by the cost of tool replacement. In addition, automating the processes that involve these tools also requires investment. These issues could be addressed by standardizing service interfaces to facilitate their integration. Linked Data is an attractive choice for implementing such a standard without sacrificing versatility. An exciting and promising proposal in this direction is the OSLC standard specification. Its purpose is to build an environment where services can interoperate using standard Linked Data models. However, the current specification version still lacks standard definitions for concepts that are critical to automating the execution of actions in fast-changing environments. Therefore, this paper proposes a new specification to extend OSLC, based on the ECA model, for event-based interoperable automation, especially for DevOps environments, which are our motivational scenario. A simple DevOps architecture is built as a prototype to validate the proposed model. Using that architecture, the proposed model is validated in a real-world workflow to prove its contribution to the OSLC standard and the DevOps field.
Vermilion River Water Supply and Demand Study
Creators: North Saskatchewan Watershed Alliance (NSWA)
Publisher: name: University of Alberta Library
Year: 2009

The goal of the Vermilion River Water Supply and Demand Study was to support the Vermilion River Watershed Management Project by integrating and assessing existing hydrologic information in the VRB, generating new knowledge on hydrologic functions in the basin, and developing tools to support water resources planning and management in the basin. (As cited in executive summary.)
Hiding its age: the case for a younger bulge
Creators: name: Haywood, M.
name: Di Matteo, P.
name: Snaith, O.
name: Calamida, A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The determination of the age of the bulge has led to two contradictory results. On the one side, the color-magnitude diagrams in different bulge fields seem to indicate a uniformly old ($>$10 Gyr) population. On the other side, individual ages derived from dwarfs observed through microlensing events seem to indicate a large spread, from $\sim$ 2 to $\sim$ 13 Gyr. Because the bulge is now recognised as being mainly a boxy peanut-shaped bar, it is suggested that disk stars are one of its main constituents, and therefore also stars with ages significantly younger than 10 Gyr. Other arguments as well point to the fact that the bulge cannot be exclusively old, and in particular cannot be a burst population, as it is usually expected if the bulge was the fossil remnant of a merger phase in the early Galaxy. In the present study, we show that given the range of metallicities observed in the bulge, a uniformly old population would be reflected into a significant spread in color at the turn-off which is not observed. Inversely, we demonstrate that the correlation between age and metallicity expected to hold for the inner disk would conspire to form a color-magnitude diagram with a remarkably small spread in color, thus mimicking the color-magnitude diagram of a uniformly old population. If stars younger than 10 Gyr are part of the bulge, as must be the case if the bulge has been mainly formed through dynamical instabilities in the disk, then a very small spread at the turn-off is expected, as seen in the observations.
description: 11 pages, 11 figures. Accepted for publication in A&A
Probing spacetime and accretion model for the Galactic Center: Comparison of Kerr and dilaton black hole shadows
Creators: name: Röder, Jan
name: Cruz-Osorio, Alejandro
name: Fromm, Christian M.
name: Mizuno, Yosuke
name: Younsi, Ziri
name: Rezzolla, Luciano
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: In the vicinity of black holes, the influence of strong gravity, plasma physics, and emission processes govern the behavior of the system. Since observations such as those carried out by the EHT are not yet able to unambiguously constrain models for astrophysical and gravitational properties, it is imperative to explore the accretion models, particle distribution function, and description of the spacetime geometry. Our current understanding of these properties is often based on the assumption that the spacetime is well-described by by the Kerr solution to general relativity, combined with basic emission and accretion models. We explore alternative models for each property performing general relativistic magnetohydrodynamic and radiative transfer simulations. By choosing a Kerr solution to general relativity and a dilaton solution to Einstein-Maxwell-dilaton-axion gravity as exemplary black hole background spacetimes, we aim to investigate the influence of accretion and emission models on the ability to distinguish black holes in two theories of gravity. We carry out three-dimensional general relativistic magnetohydrodynamics simulations of both black holes, matched at their innermost stable circular orbit, in two distinct accretion scenarios. Using general-relativistic radiative transfer calculations, we model the thermal synchrotron emission and in the next step apply a non-thermal electron distribution function, exploring representative parameters to compare with multiwavelength observations. We further consider Kerr and dilaton black holes matched at their unstable circular photon orbits, as well as their event horizons. From multiwavelength emission and spectral index analysis, we find that accretion model and spacetime have only a small impact on the spectra compared to the choice of emission model.
Impact of Mass-Gap on the Dispersion Interaction of Nanoparticles with Graphene out of Thermal Equilibrium
Creators: name: Klimchitskaya, Galina L.
name: Korikov, Constantine C.
name: Mostepanenko, Vladimir M.
name: Tsybin, Oleg Yu.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider the nonequilibrium dispersion force acting on nanoparticles on the source side of gapped graphene sheet. Nanoparticles are kept at the environmental temperature, whereas the graphene sheet may be either cooler or hotter than the environment. Calculation of the dispersion force as a function of separation at different values of the mass-gap parameter is performed using the generalization of the fundamental Lifshitz theory to the out-of-thermal-equilibrium conditions. The response of gapped graphene to quantum and thermal fluctuations of the electromagnetic field is described by the polarization tensor in (2+1)-dimensional space-time in the framework of the Dirac model. The explicit expressions for the components of this tensor in the area of evanescent waves are presented. The nontrivial impact of the mass-gap parameter of graphene on the nonequilibrium dispersion force, as compared to the equilibrium one, is determined. It is shown that, unlike the case of a pristine graphene, the nonequilibrium force preserves an attractive character. The possibilities of using the obtained results in the design of micro- and nanodevices incorporating nanoparticles and graphene sheets for their functionality are discussed.
description: 16 pages, 4 figures
Observation of self-patterned defect formation in atomic superfluids -- from ring dark solitons to vortex dipole necklaces
Creators: name: Tamura, Hikaru
name: Chen, Cheng-An
name: Hung, Chen-Lung
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: Unveiling nonequilibrium dynamics of solitonic and topological defect structures in a multidimensional nonlinear medium is a current frontier across diverse fields. One of the quintessential objects is a ring dark soliton (RDS), whose dynamics are expected to display remarkable interplay between symmetry and self-patterned topological defect formation from a transverse (snake) instability, but it has thus far evaded full experimental observations. Here, we report an experimental realization of RDS generation in a two-dimensional atomic superfluid trapped in a circular box. By quenching the confining box potential, we observe an RDS emitted from the edge and its peculiar signature in the radial motion. As an RDS evolves, we observe transverse modulations at discrete azimuthal angles, which clearly result in a patterned formation of a circular vortex dipole array. Through collisions of the vortex dipoles with the box trap, we observe vortex unbinding, vortex pinning to the edge, and emission of rarefaction pulses. Our box-quench protocol opens a new way to study multidimensional dark solitons, structured formation of topological defects, and potentially the dynamics of ordered quantum vortex matter.
Hund's rule-driven Dzyaloshinskii-Moriya interaction at 3d-5d interfaces
Creators: name: Belabbes, A.
name: Bihlmayer, G.
name: Bechstedt, F.
name: Blügel, S.
name: Manchon, A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Using relativistic first-principles calculations, we show that the chemical trend of Dzyaloshinskii-Moriya interaction (DMI) in 3d-5d ultrathin films follows Hund's first rule with a tendency similar to their magnetic moments in either the unsupported 3d monolayers or 3d-5d interfaces. We demonstrate that, besides the spin-orbit coupling (SOC) effect in inversion asymmetric noncollinear magnetic systems, the driving force is the 3d orbital occupation and their spin flip/mixing processes with the spin-orbit active 5d states control directly the sign and magnitude of the DMI. The magnetic chirality changes are discussed in the light of the interplay between SOC, Hund's first rule, and the crystal field splitting of d orbitals.
Automated surface measurements of non-Newtonian fluid properties
Creators: name: Gul, Sercan
Publisher: name: The University of Texas at Austin
Year: 2021
Subjects: Automation
Drilling fluids
Non-Newtonian rheology
Machine learning

description: Accurate and frequent mud checking is critical to optimum well construction. Proper assessment and management of drilling fluid properties such as density and rheology maintains the fluid in its role as the primary well control barrier and optimizes the fluid 's hydraulics and hole cleaning ability. However, a full mud check while drilling is typically done only once or twice a day. Moreover, the measurements are performed using largely antiquated equipment for which the data quality and reliability are highly dependent on the practicing mud engineer. An automated, continuous, and practical way of measuring and monitoring drilling fluid properties is therefore needed. Novel measurement approaches are introduced to achieve automated surface measurements of non-Newtonian fluid properties. The automated rheology measurements are conducted by a novel helical pipe-viscometer method. The real-time friction factor and critical Reynolds number values are provided by using a straight pipe-viscometer system. Other important fluid properties such as pressurized-density, oil/water ratio and temperature are provided using high-quality in-line sensors. Filtrate loss information is provided by leveraging machine-learning regressions using the automatically measured values of rheological properties, density and electrical stability. Moreover, a novel in-line X-ray fluorescence measurement approach is introduced to determine solids content and salinity of fluids. This dissertation provides details about the measurement technologies as well as the results from laboratory experiments and field trials. It was shown that by combining the measurement systems introduced here, it is possible to construct a skid unit that performs continuous drilling fluid sampling and measurements at variable temperatures. The unit is able to send real-time data to data servers and provide detailed mud reports to engineers working either on-site or remotely. The technology described here opens the door to fully automated fluid monitoring, maintenance, and solids control in well construction operations. This will benefit well construction efficiency (e.g. lowering drilling costs by better cuttings transport), quality, productivity (e.g. reducing reservoir impairment from unwanted solids) and safety (e.g. lowering incidence of well control and lost circulation events due to better equivalent circulating density (ECD) management in narrow margin drilling environments)
Multiple rings in the transition disk and companion candidates around RXJ1615.3-3255. High contrast imaging with VLT/SPHERE
Creators: name: de Boer, J.
name: Salter, G.
name: Benisty, M.
name: Vigan, A.
name: Boccaletti, A.
name: Pinilla, P.
name: Ginski, C.
name: Juhasz, A.
name: Maire, A. -L.
name: Messina, S.
name: Desidera, S.
name: Cheetham, A.
name: Girard, J. H.
name: Wahhaj, Z.
name: Langlois, M.
name: Bonnefoy, M.
name: Beuzit, J. -L.
name: Buenzli, E.
name: Chauvin, G.
name: Dominik, C.
name: Feldt, M.
name: Gratton, R.
name: Hagelberg, J.
name: Isella, A.
name: Janson, M.
name: Keller, C. U.
name: Lagrange, A. -M.
name: Lannier, J.
name: Menard, F.
name: Mesa, D.
name: Mouillet, D.
name: Mugrauer, M.
name: Peretti, S.
name: Perrot, C.
name: Sissa, E.
name: Snik, F.
name: Vogt, N.
name: Zurlo, A.
name: Consortium, SPHERE
Publisher: name: arXiv
Year: 2016
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We search for signs of ongoing planet-disk interaction and study the distribution of small grains at the surface of the transition disk around RXJ1615.3-3255 (RX J1615). We observed RXJ1615 with VLT/SPHERE. We image the disk for the first time in scattered light and detect two arcs, two rings, a gap and an inner disk with marginal evidence for an inner cavity. The shapes of the arcs suggest that they probably are segments of full rings. Ellipse fitting for the two rings and inner disk yield a disk inclination i = 47 \pm 2 degrees and find semi-major axes of 1.50 \pm 0.01" (278 au), 1.06 \pm 0.01" (196 au) and 0.30 \pm 0.01" (56 au), respectively. We determine the scattering surface height above the midplane, based on the projected ring center offsets. Nine point sources are detected between 2.1" and 8.0" separation and considered as companion candidates. With NACO data we recover four of the nine point sources, which we determine not to be co-moving, and therefore unbound to the system. We present the first detection of the transition disk of RXJ1615 in scattered light. The height of the rings indicate limited flaring of the disk surface, which enables partial self-shadowing in the disk. The outermost arc either traces the bottom of the disk or it is another ring with semi-major axis > 2.35" (435 au). We explore both scenarios, extrapolating the complete shape of the feature, which will allow to distinguish between the two in future observations. The most interesting scenario, where the arc traces the bottom of the outer ring, requires the disk truncated at r ~ 360 au. The closest companion candidate, if indeed orbiting the disk at 540 au, would then be the most likely cause for such truncation. This companion candidate, as well as the remaining four, require follow up observations to determine if they are bound to the system.
A cost-benefit appraisal of recreational facilities on an Army base
Creators: name: Aberdeen, Allan Douglas.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
title: Foreign Correspondents & the Irish Revolution 1918 - 1923
Creators: name: Walsh, Maurice
Publisher: name: Goldsmiths, University of London
Year: 2006

description: The Irish revolution of 1918-1923 not only led to the establishment of an independent Irish state; it is also recalled for the notoriety of the Black and Tans, the gendarmerie of war veterans recruited by the British government to fight a war of reprisals against the IRA. Historians have held that public perceptions of the war in Ireland were crucial to its outcome. In particular they cite critical press coverage as instrumental in turning the British public against the government's policy in Ireland. But there has been no study which thoroughly examines the work of journalists and writers who went to Ireland at this time. This thesis uses the published work of journalists and writers, evidence from archives in Britain, Ireland and the United States, journalists' memoirs and contemporary press criticism to explain the role journalists played in the conflict. It shows how British and American newspaper correspondents were able to report from Ireland with far greater freedom than they enjoyed during the First World War. Aided by their sympathy for the Irish cause and splits among the political elite in London, British correspondents set out to restore their reputation as crusading truth tellers by making visible practices of colonial warfare that would usually have remained hidden. American correspondents were enlisted by British officials as mediators. The war occurred in an age when the press and public opinion were thought to have a crucial influence on politics. Both the British government and the Irish revolutionaries tried to define the news. While examining the professional assumptions and rituals of the correspondents, the thesis examines the impact of wider political ideas on journalism. And it looks at how famous literary journalists used Ireland as a site for debates about their own societies.
ENTREPRENEURIAL ORIENTATION AND MARKET SUSTAINABILITY OF MSMES IN THE SOUTH EAST, NIGERIA
Creators: name: Chizoba, Bonaventure Okolocha
Publisher: name: TOP Journal
Year: 2024
Subjects: Entrepreneurial orientation, Market sustainability, Innovativeness and Proactiveness

description: This study ascertained the association between entrepreneurial orientation and market sustainability of MSMEs in the South East, Nigeria. Specifically, the study sought to: determine the association between innovativeness and product acceptance of MSMEs in South East, Nigeria, and ascertain the association between proactiveness and product acceptance of MSMEs in South East Nigeria. Survey research design was adopted for the study. A sample of 386 MSMEs was used by the study. Data collected through questionnaires that was distributed to the respondents were analyzed with descriptive analysis and the hypotheses were tested with Regression analysis via SPSS version 20. From the results, it was revealed that innovativeness and proactiveness have a positive and significant effect on the product acceptance of MSMEs in South East, Nigeria. Based on the findings, the study recommended among others, that MSMEs must constantly launch new products and use high innovation in product marketing operations because the innovation dimension drives new business opportunities
Higher-order Processes with Parameterization over Names and Processes
Creators: name: Xu, Xian
Publisher: name: arXiv
Year: 2016
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences
subject: F.3

description: Parameterization extends higher-order processes with the capability of abstraction and application (like those in lambda-calculus). This extension is strict, i.e., higher-order processes equipped with parameterization is computationally more powerful. This paper studies higher-order processes with two kinds of parameterization: one on names and the other on processes themselves. We present two results. One is that in presence of parameterization, higher-order processes can encode first-order (name-passing) processes in a quite neat fashion, in contrast to the fact that higher-order processes without parameterization cannot encode first-order processes at all. In the other result, we provide a simpler characterization of the (standard) context bisimulation for higher-order processes with parameterization, in terms of the normal bisimulation that stems from the well-known normal characterization for higher-order calculus. These two results demonstrate more essence of the parameterization method in the higher-order paradigm toward expressiveness and behavioural equivalence.
description: In Proceedings EXPRESS/SOS 2016, arXiv:1608.02692
Capturing the lowest luminosity state of the Supergiant Fast X-ray Transient XTE J1739-302
Creators: name: Sidoli, Lara
name: Ponti, Gabriele
name: Sguera, Vito
name: Esposito, Paolo
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We report here on the results of the analysis of Chandra, XMM-Newton and NuSTAR recent observations of the Supergiant Fast X-ray Transient XTEJ1739-302. The source was caught in a low X-ray luminosity state, from a few $10^{31}$ to $10^{34}$ erg/s (0.5-10 keV). In particular, a very low X-ray luminosity was captured during an XMM-Newton observation performed in October 2022, at a few $10^{31}$ erg/s (0.5-10 keV), never observed before in XTEJ1739-302. The XMM-Newton spectrum could be well fitted either by an absorbed, steep power law model (photon index of 3.5) or by a collisionally-ionized diffuse gas with a temperature of 0.7 keV, very likely produced by shocks in the supergiant donor wind. These observations covered different orbital phases, but all appear compatible with the low luminosity level expected from the orbital INTEGRAL light curve. The absorbing column density is variable in the range $10^{22}-10^{23}$ cm$^{-2}$. A broad-band X-ray spectrum could be investigated at $10^{34}$ erg/s (0.5-30 keV) for the first time in XTEJ1739-302 with not simultaneous (but at similar orbital phases) Chandra and NuSTAR data, showing a power law spectral shape with a photon index of about 2.2 and an absorbing column density of $\sim$$10^{23}$ cm$^{-2}$. Remarkably, owing to the XMM-Newton observation, the amplitude of the X-ray variability has increased to five orders of magnitude, making XTEJ1739-302 one of the most extreme SFXTs.
description: 10 pages, 9 Figures, 2 Tables; accepted for publication in Astronomy & Astrophysics on 24 January 2023
Proprietary and Patent Medicine Vendors in Lassa Fever Endemic Communities in Edo State, Nigeria: Assessment of Knowledge, Exposure Risk and Potential for Inclusion in Outbreak Response
Creators: name: S, Tobin EA, Ajekweneh V, Obi AI, Abah
Publisher: name: figshare
Year: 2022
Subjects: Diseases

description: Background: The study investigated the knowledge and attitude of proprietary and patent medicine vendors (PPMVs) towards Lassa fever (LF) and related practices to ascertain their risk of infection and potential role in community-based control. Methods: This cross-sectional study was conducted in Esan West and Esan Central local government areas of Edo State, Nigeria. Data were collected using self-administered questionnaires, and Statistical Package for Social Science (SPSS) was used for analysis. Result: 182 out of 200 administered questionnaires were retrieved and analysed. All respondents had heard of LF. About 35.2% (64/182) of respondents had inadequate knowledge with predictors as tertiary education (AOR = 0.11, P = 0.024), and age > 35 years (AOR = 0.07, P = 0.001). About 74.2% (135/182) expressed their willingness to educate clients on Lassa fever. About 66.5% had used a sharp device in the past 6 months, with 33.9% being an injection device. In the preceding 3 months, one-fifth encountered at least a client who did not recover after a first course of treatment for malaria. Of this, two-fifth were referred to a health facility for further care. Injection practices, hand glove use and hand hygiene were sub-optimal for 26.8% (11/41), 42.1% (51/121) and 67.6% (123/182) of respondents, respectively. Waste segregation was improper for 80.8% (147/182) of respondents. Conclusions: PPMVs, though knowledgeable about LF, held unsafe work practices. Interventions to address gaps in knowledge and infection control practices will protect them against contracting LF and position them to actively participate in LF control.
The Australian mining industry : strategy, structure and financial performance
Creators: name: Stevens, Philip J.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Ground Based Support of the Space Mission Parker Performed with Ukrainian Low Frequency Radio Telescopes
Creators: name: Dorovskyy, Vladimir
name: Melnik, Valentin
name: Brazhenko, Anatolii
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: The purpose of this work is to demonstrate the effectiveness of ground-based support for space missions, primarily PSP, using large Ukrainian decameter radio telescopes. Another goal of the work is to carry out cross calibration of the radiometers onboard spacecraft using the calibrated data of the ground-based radio telescopes. One of the most common methods of remote diagnostics of the solar corona is the study of radio emission, the sources of which are located in the solar corona at different heliocentric altitudes. The technique of joint space terrestrial observations consists in the simultaneous observation of individual events and their analysis in the widest possible frequency band during the maximum approach of the PSP vehicle to the Sun. At the same time, observation in the common frequency band is proposed to be used for calibration of the onboard radio receivers. The methods of planning joint space terrestrial observations are substantiated. Using the data of the UTR 2, URAN 2 radio telescopes and the PSP probe, the dynamic and polarization spectra of the simultaneously observed bursts on June 9, 2020 were obtained. The identification and comparison of individual bursts was carried out. A common dynamic spectrum of the bursts in the frequency band 0.5 ... 32 MHz was obtained. Cross calibration of the HFR receiver of the FIELDS PSP module in the frequency band 10...18 MHz was made using the calibrated data of terrestrial radio telescopes. The effectiveness of ground-based support of the PSP mission by the large Ukrainian radio telescopes is shown. Examples of joint observations are given, and the method of cross calibration of the FIELD PSP module receivers is demonstrated. Prospects for further ground based support for solar space missions are presented
description: 14 pages, 4 figures, 2 tables
Molecular Identification of Mycobacterium species Based on Genotype MTBC in Goats Slaughtered at Kano Abattoir, Kano State, Nigeria
Creators: name: IA, Abubakar UB, Tekdek LB, Saidu SNA, Usman AA, Surajo M, Lawson L, Abdulkadir
Publisher: name: figshare
Year: 2022
Subjects: Diseases

description: Background: Mycobacterium tuberculosis complex have been on increasing concern and a threat to public health especially in developing countries like Nigeria. This study aimed to identify Mycobacterium species based on Genotype MTBC in goats slaughtered at Kano abattoir in Kano State, Sahel part of Northern Nigeria. Methods: Post-mortem meat inspection for tuberculosis-like lesions, culture, acid-fast staining, TB Ag MPT64 (SD-bioline) and genotype MTBC were carried out. Results: A total of 500 slaughtered goats were examined, out of which 27 have gross TB lesions, which were subjected to culture, acid- fast staining, SD-bioline and genotype MTBC for detection of Mycobacterium spp. Three out of seven (42.9%) were identified as M. bovis, 1/7 (14.3%) was identified as M. tuberculosis and 3/7 (42.9%) were identified as M. bovis sbs caprae. However, it is worth noting that 2 M. bovis and 1 M. tuberculosis species were traced to male goats while the remaining 1 M. bovis and 3 M. bovis sbs caprae species were traced to female goats. Conclusions: The study highlighted the importance of tuberculosis in Goats and its potential public health implications and calls for prompt action towards controlling the disease in Kano abattoir and Nigeria in general.
Affine characters at negative level and elliptic genera of non-critical strings
Creators: name: Duque, David Jaramillo
name: Kashani-Poor, Amir-Kian
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the elliptic genera of the non-critical strings of six dimensional superconformal field theories from the point of view of the strings' worldsheet theory. We formulate a general ansatz for these in terms of characters of the affine Lie algebra associated to the 6d gauge group at negative level, and provide ample evidence for the validity of this ansatz for 6d theories obtained via F-theory compactification on elliptically fibered Calabi-Yau manifolds over a Hirzebruch base. We obtain novel closed form results for many elliptic genera in terms of our ansatz, and show that our results specialize consistently when moving along Higgsing trees.
description: 45 pages, many tables; v2: typos corrected, new closed form results for the elliptic genera of a B4 and an E7 theory conjectured; v3: version published in JHEP, link to Mathematica readable file containing negative level affine characters underlying computations in paper included
Fokker-Planck equation for the particle size distribution function in KJMA transformations
Creators: name: Tomellini, M.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The Fokker-Planck (FP) equation has been derived for describing the temporal evolution of the particle size probability density function (PDF) for KJMA (Kolmogorov-Johnson-Mehl-Avrami) transformations. The classical case of transformations with constant rates of both nucleation and growth, in 3D space, has been considered. Integration of the equation shows that the PDF is given by the superposition of one-parameter Gamma distributions with time dependent mean size given by the KJMA theory. The asymptotic behavior of the FP solution offers a demonstration of the conjecture, previously proposed by Pineda et al [E. Pineda, P. Bruna, D. Crespo, Phys. Rev. E 70 (2004) 066119], according to which the set of nuclei formed at the same time are Gamma-distributed, with parameter depending on nucleus birth time. Computer simulations of the transformation with constant nucleation and growth rates, do show that the temporal evolution of the PDF, in the volume domain, is in good agreement with the Johnson-Mehl PDF. The approach based on the FP equations provides a particle size PDF that exhibits such behavior.
description: 22 pages; 7 figures
Quasiperiodic oscillations around hairy black holes in Horndeski gravity
Creators: name: Rayimbaev, Javlon
name: Dialektopoulos, Konstantinos F.
name: Sarikulov, Furkat
name: Abdujabbarov, Ahmadjon
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Testing gravity theories and their parameters using observations is an important issue in relativistic astrophysics. In this context, we investigate the motion of test particles and their harmonic oscillations in the spacetime of non-rotating hairy black holes (BHs) in Hordeski gravity, together with astrophysical applications of quasiperiodic oscillations (QPOs). We show possible values of upper and lower frequencies of twin-peak QPOs which may occur in the orbits from innermost stable circular orbits to infinity for various values of the Horndeski parameter $q$ in relativistic precession, warped disk models, and three different sub-models of the epicyclic resonant model. We also study the behaviour of the QPO orbits and their position relative to innermost stable circular orbits (ISCOs) with respect to different values of the parameter $q$. {It is obtained that at a critical value of the Horndeski parameter ISCO radius takes $6M$ which has been in the pure Schwarzschild case.} Finally, we obtain mass constraints of the central BH of microquasars GRS 1915+105 and XTE 1550-564 at the GR limit and the possible value of the Horndeski parameter in the frame of the above-mentioned QPO models. The analysis of orbits of twin peak QPOs with the ratio of upper and lower frequencies 3:2, around the BHs in the frame of relativistic precession (RP) and epicyclic resonance (ER4) QPO models have shown that the orbits locate close to the ISCO. The distance between QPO orbits and ISCO is obtained to be less than the error of the observations.
description: 13 pages, 11 figures, 2 tables
Direct observations of rising oil droplets deformed by hydrocarbonoclastic bacteria
Creators: name: Hickl, Vincent
name: Pamu, Hima Hrithik
name: Juarez, Gabriel
Publisher: name: arXiv
Year: 2022
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: In marine environments, microscopic droplets of spilled oil can be transported over tens or hundreds kilometers in the water column. As this oil is biodegraded, growing bacteria on the droplets' surface can deform the oil-water interface to generate complex shapes and significantly enlarge droplets. A complete understanding of the fate and transport of spilled oil requires bridging the present gap between these length scales and determining how microscale processes affect large-scale transport of oil. Here, we describe experimental results describing rising oil droplets in a purpose-built hydrodynamic treadmill which rotates to keep droplets stationary in the lab frame for continuous, direct observation. Droplets of radii 10-100 $μ$m are colonized and deformed by bacteria over several days before their rising speeds through the water column are measured. Rising speeds of deformed droplets are significantly slower as a result of bio-aggregate formation at the droplet surface compared to those of droplets of weathered or unweathered oil without bacteria. Additionally, we discover bio-aggregate particles of oil and bacterial biofilms which sink through the water column. The composition of these particles is quantified using fluorescence microscopy. These results have important implications for the study of oil transport following a spill, as colonization by bacteria can cause oil droplets to remain in the water column for months or years longer than otherwise expected. An improved understanding of the physical transformations of oil droplets during biodegradation shows promise for significantly improving models of oil spills. Additionally, the formation of sinking particles of oil and bacteria presents a new vector for hydrocarbon sedimentation and potential marine oil snow formation.
title: Surface-Machines. Spatio-temporal politics at the recording surface of Bulgarian post-communism
Creators: name: Genova, Neda
Publisher: name: Goldsmiths, University of London
Year: 2023

description: How can we understand the meaning and effects of recent modifications of material surfaces of public sites in Bulgaria? The series of interventions at the Monument to the Soviet Army in Sofia and the transformations of a crowd-control fence installed in front of the Parliament building during the 2013-2014 anti-government protests offer the points of departure for this thesis. Their complex processes of both alignment with the dominant traits of the post-1989 regime in the country but also destabilisation of and challenges to its logic, complicate the possibility of a simple opposition between conformity and subversion. The analysis of the operations of these surfaces and the ways, in which they enter into relations with environments and other surfaces, necessitates the development of a conceptual framework capable of accounting for their dynamism and processual character. The notion of a “surface-machine” proposed here explicates the produced and productive character of surfaces, while challenging their reduction to the visual plane or their assignment to a subsidiary role in relation to what as surfaces, they are said to “contain”. By developing a theoretical understanding of surface-machines, this thesis seeks to propose a novel way of thinking surfaces and their spatio-temporal productivity, while taking them seriously as a terrain of political articulation. The examination of two surface-machines – of the crowd-control fence and the Monument – goes hand in hand with the investigation of the social context within which they are situated: that of Bulgarian post-communism. The thesis explores various features of this condition, such as a logic of belatedness, an adoption of anti-communist and pro-European discourses, and examines how these contribute to the solidification of a “recording surface” – a term derived from the work of Gilles Deleuze and Félix Guattari to describe the constitution of a social surface that obfuscates its own conditions of production. Conceptually, the dissertation is indebted to the work of these two authors, while drawing on Donna Haraway’s writings to develop a method of storytelling to account for the material-semiotic operations of surface-machines.
Avian Contact Study Questionnaire and Data Dictionary
Creators: name: Thomas, Amy
name: Gokool, Suzanne
name: Clapp, Genevieve
name: Whitlow, Harry
name: McGrath, Carmel
name: Moore, Peter
name: Helwegen, Maud
name: Logunleko, Mariam
name: Bueno, Irene
name: Bailey, Mick
name: Masterton, Sarah
name: Taylor, Jo
name: Brown, Ian
name: Puleston, Richard
name: Pae, Riinu
name: Smith, Louise
name: Lambton, Sarah
name: Brooks-Pollock, Ellen
Publisher: name: Zenodo
Year: 2024

description: Supplementary material to support the Wellcome Data Note titled 'Data note on the Avian Contact Study: a questionnaire resource for avian influenza public health planning' by Thomas et al. 2024. Extended data contain the REDCap questionnaire pdf and data dictionary to accompany the Data Note.
Lymphatic Filariasis in a Tertiary Hospital in South-East Nigeria: A Tale of Neglect, Low Social Class and Disability
Creators: name: OD, Iroezindu MO, Unigwe US, Udoette S, Umenzekwe CC, Nna E, Onyeaghala CA, Chika-Igwenyi NM, Mmerem JI,  Onodugo
Publisher: name: figshare
Year: 2022
Subjects: Diseases

description: Background: Lymphatic filariasis (LF) is a neglected tropical disease affecting over 40 million people globally. It is associated with profound disfigurement/disability, pain, and social stigma partly due to late presentation. We described the socio-demographic, clinical and laboratory characteristics of patients with confirmed LF in order to improve the case detection/management in resource-constrained settings. Methods: A retrospective cohort study of patients referred/presenting to the Infectious/Tropical Diseases unit of the University of Nigeria Teaching Hospital with a provisional diagnosis of LF from October 2012 to September 2017. Data was extracted from medical records. Laboratory confirmation of LF was based on Giemsa-stained blood film for microfilaria. Results: Of 50 patients with a provisional diagnosis of LF, 18 (36%) had microfilaria confirmation. The mean age among the confirmed cases was 48.3 ± 9.5 years, women were in the majority 12 (66.7%), 7 (38.9%) had primary or no formal education, and 5 (27.8%) were widowed. They were predominantly rural dwellers 12 (66.7%), farmers 8 (44.4%), and of low social class13 (72.2%). The mean duration of lymphoedema was 6.5 ± 2.3 years. Wuchereria bancrofti was identified in 17 (94.4%) cases. Limitation of movement and secondary skin/soft tissue infections were evident in 14 (77.8%) and 15 (83.3%) patients, respectively. Anaemia 4 (22.2%) and depression 2 (11.1%) were co-morbidities. A combination of filaricidal therapy/supportive care led to noticeable reduction in lymphoedema and resolution of skin infections in 10/17 (58.8%) and 13/14 (92.9%) patients, respectively. Conclusions: LF remains a tale of neglect, low social class and disability. Surveillance and active case search in endemic regions is needed for prompt diagnosis and improved outcomes.
Conetronics in 2D Metal-Organic Frameworks: Double Dirac Cones, Magnetic Half Dirac Cones and Quantum Anomalous Hall Effect
Creators: name: Wu, Menghao
name: Wang, Zhijun
name: Liu, Junwei
name: Fu, Huahua
name: Sun, Lei
name: Liu, Xin
name: Pan, Minghu
name: Weng, Hongming
name: Dinca, Mircea
name: Fu, Liang
name: Li, Ju
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Based on recently synthesized Ni3C12S12 class 2D metal-organic frameworks, we predict electronic properties of M3C12S12 and M3C12O12, where M is Zn, Cd, Hg, Be, or Mg with no M orbital contributions to bands near Fermi level. For M3C12S12, their band structures exhibit double Dirac cones with different Fermi velocities that are n and p type, respectively, which are switchable by few-percent strain. The crossing of two cones are symmetry-protected to be non-hybridizing, leading to two independent channels in 2D node-line semimetals at the same k-point akin to spin-channels in spintronics, rendering conetronics device possible. The node line rings right at their crossing, which are both electron and hole pockets at the Fermi level, can give rise to magnetoresistance that will not saturate when the magnetic field is infinitely large, due to perfect n-p compensation. For M3C12O12, together with conjugated metal-tricatecholate polymers M3(HHTP)2, the spin-polarized slow Dirac cone center is pinned precisely at the Fermi level, making the systems conducting in only one spin or cone channel. Quantum anomalous Hall effect can arise in MOFs with non-negligible spin-orbit coupling like Cu3C12O12. Compounds of M3C12S12 and M3C12O12 with different M, can be used to build spintronic and cone-selecting heterostructure devices, tunable by strain or electrostatic gating.
Towards Fleet-wide Sharing of Wind Turbine Condition Information through Privacy-preserving Federated Learning
Creators: name: Jenkel, Lorin
name: Jonas, Stefan
name: Meyer, Angela
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: Terabytes of data are collected by wind turbine manufacturers from their fleets every day. And yet, a lack of data access and sharing impedes exploiting the full potential of the data. We present a distributed machine learning approach that preserves the data privacy by leaving the data on the wind turbines while still enabling fleet-wide learning on those local data. We show that through federated fleet-wide learning, turbines with little or no representative training data can benefit from more accurate normal behavior models. Customizing the global federated model to individual turbines yields the highest fault detection accuracy in cases where the monitored target variable is distributed heterogeneously across the fleet. We demonstrate this for bearing temperatures, a target variable whose normal behavior can vary widely depending on the turbine. We show that no turbine experiences a loss in model performance from participating in the federated learning process, resulting in superior performance of the federated learning strategy in our case studies. The distributed learning increases the normal behavior model training times by about a factor of ten due to increased communication overhead and slower model convergence.
description: Added: case study results for data from a different fleet; distribution shift discussion; formatting and presentation changes. Original results remain unchanged