cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A near-infrared and optical photometric study of the Sculptor dwarf spheroidal galaxy: implications for the metallicity spread
Creators: name: Babusiaux, C.
name: Gilmore, G.
name: Irwin, M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present here a detailed study of the Sculptor dSph galaxy red giant branch (RGB) and horizontal branch (HB) morphology, combining new near-infrared photometry from CIRSI, with optical data from the ESO WFI. For a Sculptor-like old and generally metal-poor system, the position of RGB stars on the colour-magnitude diagram is mainly metallicity dependent. The advantage of using optical-NIR colours is that the position of the RGB locus is much more sensitive to metallicity than with optical colours alone. In contrast the horizontal branch (HB) morphology is strongly dependent on both metallicity and age. Therefore a detailed study of both the RGB in optical-NIR colours and the HB can help break the age-metallicity degeneracy. Our measured photometric width of the Sculptor giant branch corresponds to a range in metallicity of 0.75 dex. We detect the RGB and AGB bumps in both the NIR and optical luminosity functions, and derive from them a mean metallicity of [M/H] = -1.3 +/- 0.1. From isochrone fitting we derive a mean metallicity of [Fe/H] = -1.42 with a dispersion of 0.2 dex. These photometric estimators are for the first time consistent with individual metallicity measurements derived from spectroscopic observations. No spatial gradient is detected in the RGB morphology within a radius of 13 arcmin, twice the core radius. On the other hand, a significant gradient is observed in the HB morphology index, confirming the `second parameter problem' present in this galaxy. These observations are consistent with an early extended period of star formation continuing in time for a few Gyr. (Abridged)
description: 9 pages, 10 figures. Accepted for publication in MNRAS
Numerical investigation into coarse-scale models of diffusion in complex heterogeneous media
Creators: name: March, Nathan G.
name: Carr, Elliot J.
name: Turner, Ian W.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Computational modelling of diffusion in heterogeneous media is prohibitively expensive for problems with fine-scale heterogeneities. A common strategy for resolving this issue is to decompose the domain into a number of non-overlapping sub-domains and homogenize the spatially-dependent diffusivity within each sub-domain (homogenization cell). This process yields a coarse-scale model for approximating the solution behaviour of the original fine-scale model at a reduced computational cost. In this paper, we study coarse-scale diffusion models in block heterogeneous media and investigate, for the first time, the effect that various factors have on the accuracy of resulting coarse-scale solutions. We present new findings on the error associated with homogenization as well as confirm via numerical experimentation that periodic boundary conditions are the best choice for the homogenization cell and demonstrate that the smallest homogenization cell that is computationally feasible should be used in numerical simulations.
description: 22 pages, 10 figures, accepted version
Suttner, Ernst Chr., Taufe und Firmung
Creators: name: Schmidt-Lauber, Hans-Christoph
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 21 Nr. 3 (1972): Ökumenische Rundschau, Band 21, Heft 3
Using Formal Methods for Autonomous Systems: Five Recipes for Formal Verification
Creators: name: Luckcuck, Matt
Publisher: name: arXiv
Year: 2020
Subjects: subject: Software Engineering (cs.SE)
subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: Formal Methods are mathematically-based techniques for software design and engineering, which enable the unambiguous description of and reasoning about a system's behaviour. Autonomous systems use software to make decisions without human control, are often embedded in a robotic system, are often safety-critical, and are increasingly being introduced into everyday settings. Autonomous systems need robust development and verification methods, but formal methods practitioners are often asked: Why use Formal Methods for Autonomous Systems? To answer this question, this position paper describes five recipes for formally verifying aspects of an autonomous system, collected from the literature. The recipes are examples of how Formal Methods can be an effective tool for the development and verification of autonomous systems. During design, they enable unambiguous description of requirements; in development, formal specifications can be verified against requirements; software components may be synthesised from verified specifications; and behaviour can be monitored at runtime and compared to its original specification. Modern Formal Methods often include highly automated tool support, which enables exhaustive checking of a system's state space. This paper argues that Formal Methods are a powerful tool for the repertoire of development techniques for safe autonomous systems, alongside other robust software engineering techniques.
description: Accepted at Journal of Risk and Reliability
อุปลักษณ์ความเป็นอนิจจังในบทละครโน
Creators: name: สุนิศา ธรรมาวิวัฒน์
Publisher: name: สมาคมญี่ปุ่นศึกษาแห่งประเทศไทย
Year: 2018
Subjects: อุปลักษณ์
ความเป็นอนิจจัง
บทละครโน

description: วารสารเครือข่ายญี่ปุ่นศึกษา, 8, พิเศษ, 96-106
The Emergent Fine Structure Constant of Quantum Spin Ice Is Large
Creators: name: Pace, Salvatore D.
name: Morampudi, Siddhardh C.
name: Moessner, Roderich
name: Laumann, Chris R.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Condensed matter systems provide alternative `vacua' exhibiting emergent low-energy properties drastically different from those of the standard model. A case in point is the emergent quantum electrodynamics (QED) in the fractionalized topological magnet known as quantum spin ice, whose magnetic monopoles set it apart from the familiar QED of the world we live in. Here, we show that the two greatly differ in their fine-structure constant $α$, which parametrizes how strongly matter couples to light: $α_{\mathrm{QSI}}$ is more than an order of magnitude greater than $α_{\mathrm{QED}} \approx 1/137$. Furthermore, $α_{\mathrm{QSI}}$, the emergent speed of light, and all other parameters of the emergent QED, are tunable by engineering the microscopic Hamiltonian. We find that $α_{\mathrm{QSI}}$ can be tuned all the way from zero up to what is believed to be the \textit{strongest possible} coupling beyond which QED confines. In view of the small size of its constrained Hilbert space, this marks out quantum spin ice as an ideal platform for studying exotic quantum field theories and a target for quantum simulation. The large $α_{\mathrm{QSI}}$ implies that experiments probing candidate condensed-matter realizations of quantum spin ice should expect to observe phenomena arising due to strong interactions.
เหตุแห่งปาฏิหาริย์การฟื้นชีวิตของมะท์ซุวะกะ และภาพของพระอาจารย์ในบทละครโนเรื่องทะนิโก
Creators: name: วินัย จามรสุริยา
Publisher: name: สมาคมญี่ปุ่นศึกษาแห่งประเทศไทย
Year: 2018
Subjects: บทละครโน
ทะนิโก
พระภูเขา
การฟื้นชีวิต
ความกตัญญ

description: วารสารเครือข่ายญี่ปุ่นศึกษา, 8, พิเศษ, 107-115
Dual fuel injector modeling by finite difference method
Creators: name: Lim, Clement
Publisher: name: University of British Columbia
Year: 2009

description: The development of natural gas fueling for diesel engines is a new solution to reducing diesel engine pollutants. To convert existing diesel engines to support the use of natural gas, a new type of injector must be designed. A model to predict the hydraulic and mechanical operation of injectors that introduce the natural gas into the combustion process for diesel engines will significantly lower design times and development costs. The developed injector model couples the physical kinematics of the mechanical components with the fluid mechanics of the diesel fuel and the compressed natural gas. Development of the injector model began with the modeling and validation of the diesel injector, followed by modeling and validation of the more complex gas injector. The final version of the injector simulation uses a finite difference method, where specific reservoirs at important regions in the injector are connected by passages separated into volumes of finite length. The models are validated using experimental means with the use of an Injector Test Rig. Both a diesel injector and gas injector was modified to allow the capture of hydraulic pressure data within the injector. Comparisons of model results and experimental results of this hydraulic pressure show excellent agreement for both injectors. A device was also designed for the gas injector to measure the relative timing of the individual diesel and gas jets. Comparison of the diesel and gas needle lifts from the gas injector model with the experimental data obtained from this device shows good agreement. The final version of the injector model accurately represents both the diesel and dual fuel injectors within an acceptable amount of error associated with experimental conditions. A Lax-Wendroff velocity diffusion algorithm is used to eliminate the instabilities associated with the numerical model. The accuracy of the injector models primarily depends on the precise geometrical representation of the injectors with a secondary effect coming from effect of discharge coefficients or leakage tolerances. A study of the cycle to cycle variability for the experimental data was performed but was identified as being insufficient to establish complete confidence in the consistency of the experiment.
Mixed colour states in QCD confining vacuum
Creators: name: Buividovich, P. V.
name: Kuvshinov, V. I.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We show that confinement of spinless heavy quarks in fundamental representation of $SU(N_{c})$ gauge group can be treated as decoherence of pure colour state into a white mixture of states. Decoherence rate is found to be proportional to the tension of QCD string and the distance between colour charges. The purity of colour states is calculated.
Balanced Product Quantum Codes
Creators: name: Breuckmann, Nikolas P.
name: Eberhardt, Jens N.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: This work provides the first explicit and non-random family of $[[N,K,D]]$ LDPC quantum codes which encode $K \in Θ(N^\frac{4}{5})$ logical qubits with distance $D \in Ω(N^\frac{3}{5})$. The family is constructed by amalgamating classical codes and Ramanujan graphs via an operation called balanced product. Recently, Hastings-Haah-O'Donnell and Panteleev-Kalachev were the first to show that there exist families of LDPC quantum codes which break the $\operatorname{polylog}(N)\sqrt{N}$ distance barrier. However, their constructions are based on probabilistic arguments which only guarantee the code parameters with high probability whereas our bounds hold unconditionally. Further, balanced products allow for non-abelian twisting of the check matrices, leading to a construction of LDPC quantum codes that can be shown to have $K\in Θ(N)$ and that we conjecture to have linear distance $D\in Θ(N)$.
description: 23 pages, 11 figures
Two new species of the genus Hofmaenneria Schneider in Gerlach & Meyl, 1957 (Nematoda: Monhysterida) from Chinese Sea Area
Creators: name: ZHAI, Hongxiu
name: BAN, Shuyan
name: HUANG, Yong
Publisher: name: Station Biologique de Roscoff (SBR)
Year: 2024

description: Two new species of Hofmaenneria were collected from intertidal sediments of the Bohai Sea and the Yellow Sea, China, and they are described herein as Hofmaenneria heterospiculum sp. nov. and Hofmaenneria gracilis sp. nov. H. heterospiculum sp. nov. is characterized by cuticle striated, buccal cavity deep and cuticularized, cylindrical or cup-shaped, amphidial fovea circular, short paired spicules unequable in shape and size, left spicule stout and shorter, right spicule slender and longer, gubernaculum with a large ventrally bended apophysis, tail conico-cylindrical with three terminal setae. The second new species H. gracilis sp. nov. is characterized by body slender, outer labial and cephalic setae relatively long, small circular amphids posterior to the buccal cavity, buccal cavity cylindrical without denticles, spicules short, ventrally arcuate, gubernaculum small, without dorsal apophysis, tail slender, conico-cylindrical with three terminal setae. The discovery of the two species adds to the diversity of marine species in the genus Hofmaenneria.
Heterogeneous Multipartite Entanglement Purification for Size-Constrained Quantum Devices
Creators: name: Krastanov, Stefan
name: de la Cerda, Alexander Sanchez
name: Narang, Prineha
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The entanglement resource required for quantum information processing comes in a variety of forms, from Bell states to multipartite GHZ states or cluster states. Purifying these resources after their imperfect generation is an indispensable step towards using them in quantum architectures. While this challenge, both in the case of Bell pairs and more general multipartite entangled states, is mostly overcome in the presence of perfect local quantum hardware with unconstrained qubit register sizes, devising optimal purification strategies for finite-size realistic noisy hardware has remained elusive. Here we depart from the typical purification paradigm for multipartite states explored in the last twenty years. We present cases where the hardware limitations are taken into account, and surprisingly find that smaller `sacrificial' states, like Bell pairs, can be more useful in the purification of multipartite states than additional copies of these same states. This drastically simplifies the requirements and presents a fundamentally new pathway to leverage near term networked quantum hardware.
Epifaunal community associated with Cystoseira humilis in tide pools: Assessing the significance of depth and size as pivotal factors
Creators: name: CASADO-ABELLÁN, Irazú
name: RIERA, Rodrigo
Publisher: name: Station Biologique de Roscoff (SBR)
Year: 2024

description: Tide pools stand out as highly variable and distinctive ecosystems within the intertidal zone. Despite the accessibility of this environment for study, there has been a relatively limited focus on tide pools specifically. This study addresses this gap, aiming to enhance our understanding of variations among tide pools, considering factors such as depth and size. The brown algae Cystoseira humilis serves as the study model due to its prevalence in the tide pools of Gran Canaria. A total of 80 samples, with 10 replicates from each tide pool, were collected using a quadrat method measuring 25 cm x 25 cm in two distinct sites within each tide pool. The chosen method, though destructive, involves scraping the delimited area with a spatula to collect all material, facilitating the study of epifaunal community. Among the 6,068 organisms identified, spanning 48 species, a substantial 95% were classified as amphipods. Depth emerged as the most influential factor impacting the epifaunal community, followed closely by pool size. Notably, the study of species dissimilarity revealed that, when considering pool size, the isopod Dynamene edwarsi made the most significant contribution to dissimilarity. Conversely, when depth was the focal factor, the amphipods Apohyale perieri and Ampithoe rubricata stood out, with higher abundances in deep tide pools compared to shallow ones. Consequently, both size and depth emerged as pivotal factors influencing the studied epifaunal communities. For future ecological studies, it is crucial to account for the tide pool position in the intertidal zone and the level of hydrodynamic exposure at each site. Additionally, broadening the scope to include comparisons with tide pools from other regions and considering the presence of other algal species could provide further insights into differences in epifaunal communities.
Super tau-covers of bihamiltonian integrable hierarchies
Creators: name: Liu, Si-Qi
name: Wang, Zhe
name: Zhang, Youjin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Differential Geometry (math.DG)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We consider a certain super extension, called the super tau-cover, of a bihamiltonian integrable hierarchy which contains the Hamiltonian structures including both the local and non-local ones as odd flows. In particular, we construct the super tau-cover of the principal hierarchy associated with an arbitrary Frobenius manifold, and the super tau-cover of the Korteweg-de Vries (KdV) hierarchy. We also show that the Virasoro symmetries of these bihamiltonan integrable hierarchies can be extended to symmetries of the associated super tau-covers.
Two more alien micromolluscs in the Greek Seas: new records of Stosicia lineata and Finella pupoides from the Saronikos Gulf.
Creators: name: OVALIS, Panayotis
name: ZENETOS, Argyro
Publisher: name: Station Biologique de Roscoff (SBR)
Year: 2024

description: The Gulf of Saronikos, Greece, eastern Mediterranean, has been documented to be a hot spot area for introduced species, particularly molluscs. In addition to nine alien micromolluscs (gastropods) that have arrived in the area, most likely with shipping, two new gastropod species were found in 2023. This work reports the second finding of Stosicia lineata (Dunker, 1860) in the Mediterranean and the first finding of Finella pupoides A. Adams, 1860 from Saronikos Gulf.
Occurrence of Cornish blackfish Schedophilus medusophagus (Osteichthyes: Centrolophidae) from the Algerian coast (Southwestern Mediterranean Sea)
Creators: name: LADOUL, Sara
name: HEMIDA, Farid
name: REYNAUD, Christian
name: CAPAPÉ, Christian
Publisher: name: Station Biologique de Roscoff (SBR)
Year: 2024

description: The authors report on the first record of a specimen of Cornish blackfish Schedophilus medusophagus Cocco, 1839 from the Algerian coast. The capture occurred off Annaba, city located in the eastern region of the country. It was a large specimen which measured 456 mm in total length, 371 mm in standard length and its estimated total body weight was 900 g. This specimen is described and morphology, morphometric measurements, merisic counts and color are in total agreement with previous descriptions, therefore S. medusophagus could be included in the Algerian ichthyofauna. The present specimen of S. medusophagus has probably an Atlantic origin, larvae and small specimens could be carried by oceanic currents through the Strait of Gibraltar but this hypothesis needs confirmation.
First record of Raphitoma ephesina Pusateri, Giannuzzi Savelli & Stahlschmidt, 2017 (Gastropoda: Conoidea: Raphitomidae) from the Atlantic, with an assessment of its systematics
Creators: name: ALMÓN, Bruno
name: PÉREZ-DIESTE, Jacinto
name: TRIGO, Juan E.
name: OLIVERIO, Marco
name: CHIAPPA, Giacomo
Publisher: name: Station Biologique de Roscoff (SBR)
Year: 2024

description: Raphitoma ephesina Pusateri, Giannuzzi Savelli & Stahlschmidt, 2017 is re-transferred in the original genus Raphitoma after molecular analysis and morphological assessment. The first record of this species from the Atlantic (based on specimens from the Galician coast) is reported here.
On some alien species from Emilia-Romagna harbors (Northern Adriatic Sea, Italy)
Creators: name: LEZZI, M.
name: MAZZIOTTI, C.
Publisher: name: Station Biologique de Roscoff (SBR)
Year: 2024

description: Increased global trade has led to a surge in the introduction of non-indigenous species (NIS) worldwide. Ships, particularly merchant vessels and recreational yachts, act as vectors for these invasions by transporting NIS in ballast water or as hull fouling. This study investigates the fouling diversity of NIS in part of the North Adriatic Sea. Our field research at the ports of Ravenna and Cesenatico identified several alien species, including new records for the North Adriatic Sea: Polyandrocarpa zorritensis, Aplidium accarense. Celleporaria brunnea was documented in the western Adriatic Sea for the first time. Additionally, a significant presence of the cryptogenic species Molgula manhattensis was observed in Cesenatico.
Creating a 1995 IES Database in STATA
Creators: name: Gilimani, Benedict Mandlenkosi
name: Gilimani, Benedict Mandlenkosi
Publisher: name: Unknown
Year: 2003
Subjects: Consumer/Household Economics

description: This technical paper serves as an outline of the procedures followed to create household level income and expenditure data files in the statistical software package STATA. The datasets are used for the development of various Social Accounting Matrices for South Africa. A national data set, four regional data sets and nine provincial data sets were created; all based on the Income and Expenditure Survey (IES) of 1995. The STATA programming files (do-files) used are attached as a technical appendix to this paper.
Macrobenthos discarded from bottom trawl fishing on the coast of Al Hoceima, Moroccan Mediterranean
Creators: name: KEZNINE, Mohamed
name: MGHILI, Bilal
name: HASNI, Soufiane
name: AKSISSOU, Mustapha
Publisher: name: Station Biologique de Roscoff (SBR)
Year: 2024

description: The focus of this study is to assess and quantify the discards from coastal trawlers in the southern Alboran Sea (near Al Hoceima port). 38 commercial fishing hauls were investigated between July and December of 2021 using a bottom otter trawl. The majority of the small individual and non-commercial mollusks, decapods, and echinoderms which made about 19% of the catch was discarded. A high species richness was observed in the total discards during the study period, with 72 taxa being discarded. The phylum were Mollusca (23 sp.), Arthropoda (5 spp.), Cnidaria (11 spp.), Chordata (8 spp.), Porifera (3 spp.), Bryozoa (1 sp.), Ectoprocta (1 sp.) and Echinodermata (20 spp.). The catches ranged from 3.9 to 57.6 kg haul-1, with the most catches in the autumn. The difference between benthic communities in the fishing areas caused significant differences in the discard composition, structure and biomass between study sites. This present study extends the alpha taxonomic knowledge on bycatch of non-commercial species in the coastal trawlers on the northeast coast of Morocco. However, it is of critical importance to urgently assess the negative impacts the trawlers has on the benthic community along the coast of Morocco.
The PROVIDE Project Standard Computable General Equilibrium Model
Creators: name: McDonald, Scott
name: McDonald, Scott
Publisher: name: Unknown
Year: 2003
Subjects: International Relations/Trade

description: The paper describes the Standard Computable General Equilibrium (CGE) model developed for the PROVIDE Project. The model allows for a generalised treatment of trade relationships by incorporating provisions for non-traded exports and imports, and competitive and noncompetitive imports, and allows the relaxation of the small country assumption for exported commodities. The model encompasses multiple product activities by differentiating between commodities by the activities that produce them, using a range of production technologies that can be selected by the user. The model is designed for calibration using data compiled as a Social Accounting Matrix (SAM). The model is designed so that it can be readily adapted by the user to incorporate different and/or additional behavioural assumptions.
Multiple Series Representations of $N$-fold Mellin-Barnes Integrals
Creators: name: Ananthanarayan, B.
name: Banik, Sumit
name: Friot, Samuel
name: Ghosh, Shayan
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Mellin-Barnes (MB) integrals are well-known objects appearing in many branches of mathematics and physics, ranging from hypergeometric functions theory to quantum field theory, solid state physics, asymptotic theory, etc. Although MB integrals have been studied for more than one century, until now there is no systematic computational technique of the multiple series representations of $N$-fold MB integrals for $N>2$. Relying on a simple geometrical analysis based on conic hulls, we show here a solution to this important problem. Our method can be applied to resonant (i.e logarithmic) and nonresonant cases and, depending on the form of the MB integrand, it gives rise to convergent series representations or diverging asymptotic ones. When convergent series are obtained the method also allows, in general, the determination of a single master series for each series representation, which considerably simplifies convergence studies and/or numerical checks. We provide, along with this paper, a Mathematica implementation of our technique with examples of applications. Among them, we present the first evaluation of the hexagon and double box conformal Feynman integrals with unit propagator powers.
description: Significantly revised version accepted in Phys. Rev. Lett. Important additions: ancillary files for the automatization of our MB computational method, including the Mathematica package MBConicHulls.wl and the notebook Examples.nb with some examples of applications (among others, the Double Box and Hexagon conformal Feynman integrals with unit propagator powers)
Chandra large-scale mapping of the Galactic center: Probing high-energy structures around the central molecular zone
Creators: name: Wang, Q. Daniel
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Recent observations have revealed interstellar features that apparently connect energetic activity in the central region of our Galaxy to its halo. The nature of these features, however, remains largely uncertain. We present a Chandra mapping of the central 2x4 square degree field of the Galaxy, revealing a complex of X-ray-emitting threads plus plume-like structures emerging from the Galactic center (GC). This mapping shows that the northern plume or fountain is offset from a well-known radio lobe (or the GCL), which however may represent a foreground HII region, and that the southern plume is well wrapped by a corresponding radio lobe recently discovered by MeerKAT. In particular, we find that a distinct X-ray thread, G0.17-0.41, is embedded well within a nonthermal radio filament, which is locally inflated. This thread with a width of ~1.6" (FWHM) is ~6 pc long at the distance of the GC and has a spectrum that can be characterized by a power law or an optically-thin thermal plasma with temperature ~3 keV. The X-ray-emitting material is likely confined within a strand of magnetic field with its strength > 1 mG, not unusual in such radio filaments. These morphological and spectral properties of the radio/X-ray association suggest that magnetic field re-connection is the energy source. Such re-connection events are probably common when flux tubes of antiparallel magnetic fields collide and/or become twisted in and around the diffuse X-ray plumes, representing blowout superbubbles driven by young massive stellar clusters in the GC. The understanding of the process, theoretically predicted in analog to solar flares, can have strong implications for the study of interstellar hot plasma heating, cosmic-ray acceleration and turbulence.
description: accepted for publication in MNRAS
Hadron-Quark phase transition in the context of GW190814
Creators: name: Rather, I. A.
name: Usmani, A. A.
name: Patra, S. K.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The properties of the neutron stars are calculated for the hadronic matter within the density-dependent relativistic mean-field model (DD-RMF). The phase transition to the quark matter is studied and the hybrid star matter properties are systematically calculated using the Vector-Enhanced Bag model (vBag). The maximum mass of neutron star with DD-LZ1 and DD-RMF parameter sets is found to be around 2.55$M_{\odot}$ for pure hadronic phase and around 2$M_{\odot}$ for hadron-quark mixed phase using both Gibbs and Maxwell construction. The tidal deformability for the hybrid EoS at 1.4$M_{\odot}$, $Λ_{1.4}$, remains unchanged from the pure hadronic EoS with Maxwell construction, but decreases with the increasing neutron star mass for Gibbs construction. While the pure hadron matter EoS satisfies the mass constraint from recently observed GW190814 data, implying a stiff neutron star EoS, the hadron-quark phase transition satisfies the constraints from the recent observations GW170817. Therefore, we cannot exclude the possibility of the secondary object in GW190814 as a neutron star with a phase transition to the quark matter that satisfies the 2$M_{\odot}$ maximum mass limit.
description: 26 pages, 7 figures, 2 tables
The spectrum of equivariant Kasparov theory for cyclic groups of prime order
Creators: name: Dell'Ambrogio, Ivo
name: Meyer, Ralf
Publisher: name: arXiv
Year: 2020
Subjects: subject: K-Theory and Homology (math.KT)
subject: Operator Algebras (math.OA)
subject: FOS: Mathematics
subject: 19K35, 19L47, 18G80

description: We compute the Balmer spectrum of the equivariant bootstrap category of separable $G$-C*-algebras when $G$ is a group of prime order.
description: 13 pages. A few other minor changes such as updated references. Final version, to appear in Annals of K-theory
Artificial and Biological Intelligence
Creators: name: Kak, Subhash
Publisher: name: arXiv
Year: 2006
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: This article considers evidence from physical and biological sciences to show machines are deficient compared to biological systems at incorporating intelligence. Machines fall short on two counts: firstly, unlike brains, machines do not self-organize in a recursive manner; secondly, machines are based on classical logic, whereas Nature's intelligence may depend on quantum mechanics.
description: 16 pages
Nonlinear cosmological structure with ultralight bosons via modified gravity
Creators: name: Medellin-Gonzalez, Stefany G.
name: Urena-Lopez, L. Arturo
name: Gonzalez-Morales, Alma X.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Ultra-light bosons as dark matter has become a model of major interest in Cosmology, due to the possible imprint of a distinct signature in the cosmic structure both at the linear and non-linear scales. In this work we show that the equations of motion for density perturbations for this kind of models can be written in terms of a modified gravitational potential. Taking advantage of this parallelism, we use the MG-PICOLA code originally developed for modified gravity models to evolve the density field of axion models with and without self-interaction. Our results indicate that the quantum potential adds extra suppression of power at the non-linear level, and it is even capable of smoothing any bumpy features initially present in the mass power spectrum.
description: 11 pages, 4 figures
Creating a 2000 IES-LFS Database in Stata
Creators: name: Pauw, Kalie
name: Pauw, Kalie
Publisher: name: Unknown
Year: 2005
Subjects: Consumer/Household Economics

description: The Income and Expenditure Survey of 2000 is the most recent comprehensive source of information on income and expenditure patterns of South African households. This data is used to compile various household-related sub-matrices for a series of Social Accounting Matrices for South Africa. By linking the Labour Force Survey of September 2000, which contains detailed employment data on occupation codes, activity codes and wages of workers, with the Income and Expenditure Survey of 2000 various factor-related sub-matrices can also be extracted. This paper discusses the steps followed to extract data, correct problems and errors where appropriate or necessary, merge various files, and create Stata format data files that can be used to compile the relevant submatrices. The focus remains highly technical throughout.
"Viscosity"/TS, "Viscosity in particle shape in colloid solutions" (no.11: "Evaluation of integrals"/"Viscosity of ellipsoids in solution. Jeffery's solution"/"Force-pair. Relaxation-time. Kinetic energy. Average of f over directions. Numerical calculations." Onsager to Dr. Eisenstein (draft in German)
Creators: name: Onsager, Lars
Publisher: name: Unknown
Year: 0

description: Tidligere referanse: 11:125
Jüngel, Eberhard / Rahner, Karl, Was ist ein Sakrament?
Creators: name: Urban, Hans Jörg
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 21 Nr. 3 (1972): Ökumenische Rundschau, Band 21, Heft 3
Three level atom optics in dipole traps and waveguides
Creators: name: Eckert, K.
name: Mompart, J.
name: Corbalan, R.
name: Lewenstein, M.
name: Birkl, G.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: An analogy is explored between a setup of three atomic traps coupled via tunneling and an internal atomic three-level system interacting with two laser fields. Within this scenario we describe a STIRAP like process which allows to move an atom between the ground states of two trapping potentials and analyze its robustness. This analogy is extended to other robust and coherent transport schemes and to systems of more than a single atom. Finally it is applied to manipulate external degrees of freedom of atomic wave packets propagating in waveguides.
description: 14 pages, 6 figures; submitted to special issue 'Quantum Control of Light and Matter' of Optics Communications
Cohomology of partially ordered sets and local cohomology of section rings
Creators: name: Brun, Morten
name: Bruns, Winfried
name: Roemer, Tim
Publisher: name: arXiv
Year: 2005
Subjects: subject: Commutative Algebra (math.AC)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05E25, 06A11, 13C14, 13D45

description: We study local cohomology of rings of global sections of sheafs on the Alexandrov space of a partially ordered set. We give a criterion for a splitting of the local cohomology groups into summands determined by the cohomology of the poset and the local cohomology of the stalks. The face ring of a rational pointed fan can be considered as the ring of global sections of a flasque sheaf on the face poset of the fan. Thus we obtain a decomposition of the local cohomology of such face rings. Since the Stanley-Reisner ring of a simplicial complex is the face ring of a rational pointed fan, our main result can be interpreted as a generalization of Hochster's decomposition of local cohomology of Stanley-Reisner rings.
description: 24 pages; To appear in Adv. Math. Revised version of the paper
ИНФЕКЦИОН КАСАЛЛИКЛАРДАН СЎНГ ҚОН ДОНОРЛАРИДА МИНЕРАЛ ВА ВИТАМИНЛАР АЛМАШИНУВИ
Creators: name: Жўрабаев, Махсуджон
Publisher: name: Zenodo
Year: 2024

description: Қон донорлиги – донор томонидан қон ва унинг таркибий қисмларини ихтиёрий равишда топширишдир. Бу эса жамият саломатлиги учун берилиши мумкин бўлган беғараз ёрдамдир. Қон донорлиги шарафли фаолият бўлиши билан бирга жуда катта эхтиёткорликни талаб этади. Қон донорлари ҳам турли хил вирусли ёки инфекцион касалликлар билан хар хил муддат давомида оғриб туради. Касаллик билан курашиш мақсадида турли хил дармон дорилар истемол қилишади. Касалликдан тузалгач донорлик қилишади. Шунда донорларнинг қони таркибидаги минераллар ва витаминлар алмашинуви қандайлиги, клиник ва биокимёвий кўрсаткичлари текширилиши муҳимлигини ўрганиш назарда тутилган.
Stability analysis and design for intelligent robot control
Creators: name: Choi, Jooyeol
Publisher: name: University of British Columbia
Year: 2009

description: This thesis focuses on the development and implementation of a robust and knowledge-based control approach for multi-link robot manipulator systems. A robot manipulator is a nonlinear and complex dynamic system that suffers from structured and unstructured uncertainties, and hence requires a robust control algorithm for satisfactory performance. Based on the concepts of sliding-mode control and fuzzy logic control (FLC), a fuzzy sliding-mode controller is developed, which possess good robustness properties of sliding-mode control and the flexibility and 'intelligent' capabilities of knowledge-based control through the use of fuzzy logic. The relationship between the design parameters of a fuzzy sliding-mode controller and the tracking performance of a closed-loop control system is established, so that a specification on tracking accuracy can be satisfied by proper choice of the controller parameters. To accommodate the control of a coupled system where the number of generalized coordinates that need to be controlled exceeds the number of control inputs, an alternative version of sliding-mode control termed coupled sliding-mode control, is introduced. Extensive simulation studies with both fuzzy sliding-mode control and conventional sliding-mode control are carried out for a single-module manipulator consisting of two links: one free to slew (revolute joint) while the other is permitted to deploy (prismatic joint). Furthermore, to represent the stability of a fuzzy logic control system rather comprehensively in terms of both qualitative and quantitative aspects, stability indices, which are measures of relative stability of a system, are established. These indices quantify the degree of variation to which a system can be subjected before becoming unstable. By considering the relationship between the stability indices and the design parameters, it is demonstrated that an FLC can be designed to guarantee global stability of a system. Also, using stability indices, a comprehensive stability analysis and design guidelines for coupled sliding-mode control are developed. Finally, the control schemes are implemented on a laboratory prototype of a variable-geometry manipulator. The experimental studies with fuzzy sliding-mode control as well as conventional sliding-mode control show that the tracking error is guaranteed to converge to a specification, which verifies the results obtained through analysis and computer simulations.
The Welfare Impacts of National and International Agricultural Efficiency Gains - A South African Case Study
Creators: name: McDonald, Scott
name: Pauw, Kalie
name: Punt, Cecilia
name: McDonald, Scott
name: Pauw, Kalie
name: Punt, Cecilia
Publisher: name: Unknown
Year: 2004
Subjects: Productivity Analysis

description: Ongoing agricultural and food commodity price declines associated with efficiency gains in agricultural production, both domestically and internationally, can have important welfare effects for a country. The fact that consumers can buy cheaper imported and/or domestically produced foodstuffs has various spin-off effects in the economy. However, as with any economic shock there are winners and losers, and hence it is important to gain an understanding of the economywide effects, specifically in terms of the employment effects and the income- and substitution effects associated with relative price changes in the economy. In this paper the impact of domestic and international efficiency changes in the agricultural sector is modelled using a South African Computable General Equilibrium model with highly disaggregated food and agricultural sectors. The results indicate that while consumers gain from both domestic and international efficiency gains, domestic agricultural producers face a contraction in output when world trade prices decline as a result of international efficiency gains. Efficiency gains have different welfare impacts upon different types of household, with rural households not gaining as much as urban households due to job losses in the agricultural sector that offset welfare gains associated lower prices.
"Voici ce que j'ai trouve": Sophie Germain's grand plan to prove Fermat's Last Theorem
Creators: name: Laubenbacher, Reinhard
name: Pengelley, David
Publisher: name: arXiv
Year: 2008
Subjects: subject: History and Overview (math.HO)
subject: FOS: Mathematics

description: A study of Sophie Germain's extensive manuscripts on Fermat's Last Theorem calls for a reassessment of her work in number theory. There is much in these manuscripts beyond the single theorem for Case 1 for which she is known from a published footnote by Legendre. Germain had a fully-fledged, highly developed, sophisticated plan of attack on Fermat's Last Theorem. The supporting algorithms she invented for this plan are based on ideas and results discovered independently only much later by others, and her methods are quite different from any of Legendre's. In addition to her program for proving Fermat's Last Theorem in its entirety, Germain also made major efforts at proofs for particular families of exponents. The isolation Germain worked in, due in substantial part to her difficult position as a woman, was perhaps sufficient that much of this extensive and impressive work may never have been studied and understood by anyone.
description: to appear in Historia Mathematica
On the distribution of the mean energy in the unitary orbit of quantum states
Creators: name: Salvia, Raffaele
name: Giovannetti, Vittorio
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 28C10

description: Given a closed quantum system, the states that can be reached with a cyclic process are those with the same spectrum as the initial state. Here we prove that, under a very general assumption on the Hamiltonian, the distribution of the mean extractable work is very close to a gaussian with respect to the Haar measure. We derive bounds for both the moments of the distribution of the mean energy of the state and for its characteristic function, showing that the discrepancy with the normal distribution is increasingly suppressed for large dimensions of the system Hilbert space.
description: 34 pages, 1 figure Expanded the introduction; minor editing
Doubly Periodic Instanton Zero Modes
Creators: name: Ford, Chris
name: Pawlowski, Jan M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: Fermionic zero modes associated with doubly periodic SU(2) instantons of unit charge are considered. In cases where the action density exhibits two `instanton cores' the zero mode peaks on one of four line-segments joining the two constituents. Which of the four possibilities is realised depends on the fermionic boundary conditions; doubly periodic, doubly anti-periodic or mixed.
description: 12 pages, 4 figures
Health disparities and treatment approaches in portopulmonary hypertension and idiopathic pulmonary arterial hypertension: an analysis of the Pulmonary Hypertension Association Registry
Creators: name: Thenappan, Thenappan
name: Burger, Charles D.
name: Bull, Todd M.
name: Simon, Marc A.
name: Klinger, James R.
name: Feldman, Jeremy P.
name: Ivy, D. Dunbar
name: Runo, James R.
name: Mathai, Stephen C.
name: Cadaret, Linda M.
name: Ramani, Gautam
name: Ryan, John J.
name: DuBrock, Hilary M.
name: Badesch, David
name: Al‐Naamani, Nadine
name: Rosenzweig, Erika B.
name: Krowka, Michael J.
name: Sager, Jeffrey S.
name: Bartolome, Sonja D.
name: PHAR Investigators
name: Ford, H. James
name: Mazimba, Sula
name: Frantz, Robert P.
name: Horn, Evelyn M.
name: De Marco, Teresa
name: Eggert, Michael
name: Presberg, Kenneth W.
name: Chakinala, Murali
name: Lammi, Matthew R.
name: Elwing, Jean M.
Publisher: name: Wiley
Year: 2021

description:
Compared to idiopathic pulmonary arterial hypertension (IPAH), patients with portopulmonary hypertension (POPH) have worse survival. Health disparities may contribute to these differences but have not been studied. We sought to compare socioeconomic factors in patients with POPH and IPAH and to determine whether socioeconomic status and/or POPH diagnosis were associated with treatment and health-care utilization. We performed a cross-sectional study of adults enrolled in the Pulmonary Hypertension Association Registry. Patients with IPAH (n = 344) and POPH (n = 57) were compared. Compared with IPAH, patients with POPH were less likely to be college graduates (19.6% vs. 34.9%, p = 0.02) and more likely to be unemployed (54.7% vs. 30.5%, p < 0.001) and have an annual household income below poverty level (45.7% vs. 19.0%, p < 0.001). Patients with POPH had similar functional class, quality of life, 6-min walk distance, and mean pulmonary arterial pressure with a higher cardiac index. Compared with IPAH, patients with POPH were less likely to receive combination therapy (46.4% vs. 62.2%, p = 0.03) and endothelin receptor antagonists (28.6% vs. 55.1%, p < 0.001) at enrollment with similar treatment at follow-up. Patients with POPH had more emergency department visits (1.7 ± 2.1 vs. 0.9 ± 1.2, p = 0.009) and hospitalizations in the six months preceding enrollment (1.5 ± 2.1 vs. 0.8 ± 1.1, p = 0.02). Both POPH diagnosis and lower education level were independently associated with a higher number of emergency department visits. Compared to IPAH, patients with POPH have lower socioeconomic status, are less likely to receive initial combination therapy and endothelin receptor antagonists but have similar treatment at follow-up, and have increased health-care utilization.
Quantifying the Economic Divide in South African Agriculture: An Income-Side Analysis
Creators: name: Pauw, Kalie
name: Pauw, Kalie
Publisher: name: Unknown
Year: 2005
Subjects: Consumer/Household Economics

description: The dualistic nature of the South African economy manifests itself to a large extent in the agricultural sector, where ownership and access to land was previously reserved and is still mainly controlled today by white farmers. As a result black farmers were prevented from sharing in the profits derived from a thriving agricultural sector, contributing to the large disparities between the income levels of white and black agricultural households. In this paper the inequality in the distribution of income between the black and white agricultural populations is quantified using various decomposition and data exploratory techniques. Analyses of data from the Income and Expenditure Survey of 2000 and the Labour Force Survey of September 2000 (Statistics South Africa) suggest that not only are inequalities within agriculture higher and more pronounced along racial lines than inequalities within non-agriculture, but these inequalities can be explained to a large extent by differences in the ownership of income-generating assets such as land and productive capital. However, given the high poverty rates and meagre incomes among black subsistence and small-scale farmer households, much needs to be done in order to increase returns to non-commercial agriculture before it will become a solution to poverty reduction.