cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A Conceptual Basis for Software Engineering Measurement
Creators: name: Bush, Martin. Ernest.
Publisher: name: London South Bank University
Year: 1994

description: The ten publications chosen for inclusion in this PhD by Publication submission have resulted from work on (or following on from) the ESPRIT II project “METKIT”, which began in early 1989 and ended in mid-1992. The aim of METKIT was to produce a range of teaching materials about software metrics, or - more accurately - software engineering measurement (a new term adopted by METKIT), for use within industry and academia. The project began with an in-depth study of current practice in both industry and academia, as well as a literature survey, which revealed the need for some form of conceptual framework to pull together the apparently diverse range of topics making up the subject of software metrics. Existing frameworks were found to be inadequate due to ambiguity and lack of rigour. In particular, it was felt that there was a need to relate these diverse topics to measurement theory, which was increasingly seen as playing a central role. Also, the boundary of the subject area itself was found to be ill-defined. The subsequent definition and wide-spread dissemination (both in industry and academia) of a coherent software engineering measurement culture has been the primary achievement of METKIT. The publications contained in this submission indicate the strong impact which the METKIT teaching materials have had (up to the time of writing), as well as presenting the details of the original conceptual framework which forms their basis. The development of this conceptual framework came about through careful consideration of the definition of measurement, and also adoption of goal-driven measurement as a central notion. This led on to the identification of a natural boundary for the subject of software engineering measurement. For example, the consideration of a broad range of measurement goals resulted in the inclusion of topics such as experimental design, how to go about setting up a measurement programme and human issues in data collection. Previously, the subject of software metrics was seen as being centred on ways of measuring software, with an emphasis on complexity measurement. This is now seen more as a niche area in software engineering measurement.
Local Structure of L1_2-Ordered Ni_75(Al_1-xFe_x)_25 Alloys
Creators: name: S. Pascarelli
name: F. Boscherini
name: S. Mobilio
name: K. Lawniczak-Jablonska
name: R. Kozubski
Publisher: name: INFN Open Access Repository
Year: 1994

description: We present an Fe and Ni K-edge extended x-ray-absorption fine structure study of the L1_2-ordered ternary alloy Ni_75(Al_1-xFe_x)_25. We find that Fe enters predominantly the Al sublattice of Ni_3Al(γ' phase). The distribution of Fe and Al atoms on this sublattice follows the expected distribution for an L1_2 structure. The Fe nearest-neighbor distances are consistent with the measured lattice parameters. The first coordination shell around Ni is composed of Ni, Fe, and Al atoms. The Ni-Ni and Ni-Fe bond lengths are consistent with diffraction data. On the other hand, an unexpected strong (≈0,2A) decrease of the Ni-Al distance with increasing Fe content is detected, the Ni-Al bond being also characterized by a large disorder. This result provides a local structural explanation to the large lattice strains recently measured in similar samples by x-ray diffraction.
MPEC 2023-X284 : 2020 XJ15
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Charge ratchet from spin flip: space-time symmetry paradox
Creators: name: Smirnov, Sergey
name: Bercioux, Dario
name: Grifoni, Milena
name: Richter, Klaus
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Traditionally the charge ratchet effect is considered as a consequence of either the spatial symmetry breaking engineered by asymmetric periodic potentials, or time asymmetry of the driving fields. Here we demonstrate that electrically and magnetically driven quantum dissipative systems with spin-orbit interactions represent an exception from this standard idea. In contrast to the so far well established belief, a charge ratchet effect appears when both the periodic potential and driving are symmetric. We show that the source of this paradoxical charge ratchet mechanism is the coexistence of quantum dissipation with the spin flip processes induced by spin-orbit interactions.
description: 5 pages, 3 figures
What's in a Message?
Creators: name: Afantenos, Stergos D.
name: Hernandez, Nicolas
Publisher: name: arXiv
Year: 2009
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: In this paper we present the first step in a larger series of experiments for the induction of predicate/argument structures. The structures that we are inducing are very similar to the conceptual structures that are used in Frame Semantics (such as FrameNet). Those structures are called messages and they were previously used in the context of a multi-document summarization system of evolving events. The series of experiments that we are proposing are essentially composed from two stages. In the first stage we are trying to extract a representative vocabulary of words. This vocabulary is later used in the second stage, during which we apply to it various clustering approaches in order to identify the clusters of predicates and arguments--or frames and semantic roles, to use the jargon of Frame Semantics. This paper presents in detail and evaluates the first stage.
Dirac fermion quantization on graphene edges: Isospin-orbit coupling, zero modes and spontaneous valley polarization
Creators: name: Tkachov, Grigory
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The paper addresses boundary electronic properties of graphene with a complex edge structure of the armchair/zigzag/armchair type. It is shown that the finite zigzag region supports edge bound states with discrete equidistant spectrum obtained from the Green's function of the continuum Dirac equation. The energy levels exhibit the coupling between the valley degree of freedom and the orbital quantum number, analogous to a spin-orbit interaction. The characteristic feature of the spectrum is the presence of a zero mode, the bound state of vanishing energy. It resides only in one of the graphene valleys, breaking spontaneously Kramers' symmetry of the edge states. This implies the spontaneous valley polarization characterized by the valley isospin $\pm 1/2$. The polarization is manifested by a zero-magnetic field anomaly in the local tunneling density of states, and is directly related to the local electric Hall conductivity.
description: 9 pages, 6 figures, to be published in Phys. Rev. B
Study of Deuterium Charging Behaviour in Palladium and Palladium Alloy Plates, Changing Surface Treatments, by ms Pulsed Electrolysis
Creators: name: F. Celani
name: A. Petrocchi
name: P. Tripodi
name: A. Spallone
name: D. Di Gioacchino
name: P. Marini
name: V. Di Stefano
name: M. Diociaiuti
name: A. Mancini
Publisher: name: INFN Open Access Repository
Year: 1995

description: A systematic study about deuterium loading in palladium has been performed. Palladium cold worked plates and palladium alloy plates have been used as comparison. A proper plate surface oxidation has been performed and anomalous absorption rates have been measured. A high peak current (15 A), short width pulse (duration 1μs) electrolysis technique has been used to test all chatode plates and it is visible that this technique permits to reach very high D/Pd loading values (around 1/1 or even more for palladium). At the beginning of the loading, in close relation with the anomalous absorption rate, a bump of excess heat has been measured in two similar oxidized surface palladium plates.All these tests show that the loading is completely reproducible.
Change in prevalence and retention of patients in Canadian psychiatric institutions, 1955-1960.
Creators: name: Kennedy, Margaret Josephine
Publisher: name: University of British Columbia
Year: 2011

description: The 75,000 patients in mental institutions are only a fraction of the mentally ill in Canada. All of these hospitalized patients have passed through several phases of a complicated selective process. Interpersonal relations, group and community attitudes, and hospital policy, are some of the interacting factors in this process. The hospitalized population is a conglomerate of recent admissions and patients remaining from the admissions of many previous years. Changes in various hospital and societal factors affect the nature of these cohorts. For these reasons, the composition of the hospital population merits consideration of itself, rather than as an index of the amount of mental illness in the total population. The purpose of this thesis was (a) to review the characteristics of psychiatric patients under institutional care in Canada in 1960 and compare them with those of other populations reported in the literature, (b) to assess the changes which have taken place in this population between 1955 and 1960, and (c) to elucidate some of the reasons for this change and to suggest areas of further enquiry. The results show that, in 1960, seventy per cent of the 75,000 patients had been under continuous hospital care for over two years. The proportion of the population under hospital care increased with age. Schizophrenia was the most frequent diagnosis for patients over 20, and mental deficiency the most frequent for those under 20. Statistically significant changes occurred between 1955 and 1960 in the number and characteristics of patients under hospital care. The following variables were affected: (a) Age groups: there were fewer patients between the ages of 20 and 59, and more younger and older patients. (b) Diagnostic categories: Schizophrenia decreased and mental deficiency increased. c) Length of stay: there were more recently-admitted patients, and a decrease in the number of patients hospitalized-for from two to five years. Although a smaller proportion of the patients admitted in 1958 was retained continuously than of those admitted in 1955, there were still approximately 4,000 patients remaining for more than two years from the cohorts of each of these years. Changes in the retention ratios are associated with changes in the composition of the patient population between 1955 and 1960. Some suggestions from other studies regarding the causes of current changes were rejected. These suggestions included (a) the changing age distribution of the population, (b) separation of a large cohort of patients who were admitted between 1933 and 1937, and (c) a decline in syphilitic brain syndrome, and (d) increased use of tranquillizers. Publications of the Dominion Bureau of Statistics were discussed, and suggestions made for additional tabulations. Implications for other studies on hospitalized patients were presented.
Einstein-aether as a quantum effective field theory
Creators: name: Withers, Benjamin
Publisher: name: arXiv
Year: 2009
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The possibility that Lorentz symmetry is violated in gravitational processes is relatively unconstrained by experiment, in stark contrast with the level of accuracy to which Lorentz symmetry has been confirmed in the matter sector. One model of Lorentz violation in the gravitational sector is Einstein-aether theory, in which Lorentz symmetry is broken by giving a vacuum expectation value to a dynamical vector field. In this paper we analyse the effective theory for quantised gravitational and aether perturbations. We show that this theory possesses a controlled effective expansion within dimensional regularisation, that is, for any process there are a finite number of Feynman diagrams which will contribute to a given order of accuracy. We find that there is no log-running of the two-derivative phenomenological parameters, justifying the use of experimental constraints for these parameters obtained over many orders of magnitude in energy scale. Given the stringent experimental bounds on two-derivative Lorentz-violating operators, we estimate the size of matter Lorentz-violation which arises due to loop effects. This amounts to an estimation of the natural size of coefficients for Lorentz-violating dimension-six matter operators, which in turn can be used to obtain a new bound on the two-derivative parameters of this theory.
description: 21 pages
Supplementary material from Dunking rusk: innovative food soaking behaviour in Goffin's cockatoos (Cacatua goffiniana)
Creators: name: Zewald, J. S.
name: Auersperg, A. M. I.
Publisher: name: The Royal Society
Year: 2023
Subjects: classificationCode: 310499
subject: Evolutionary biology not elsewhere classified
classificationCode: 310901
subject: Animal behaviour
classificationCode: 520499
subject: Cognitive and computational psychology not elsewhere classified

description: Table S1 Detailed ethogram; S2 Statistical analysis
Presented Status of the Frascati National Laboratories
Creators: name: P. Laurelli
Publisher: name: INFN Open Access Repository
Year: 1997

description: The Frascati National Laboratories are the largest INFN Laboratory, with a long standing tradition in constructing and operating e^+e^- storage rings and large size detectors. The present status of the experimental programs is reviewed, with special emphasis to DAFNE and its experiments.
A Tighter Bound for the Determinization of Visibly Pushdown Automata
Creators: name: Van Tang, Nguyen
Publisher: name: arXiv
Year: 2009
Subjects: subject: Formal Languages and Automata Theory (cs.FL)
subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences
subject: F.4.3; F.4.1

description: Visibly pushdown automata (VPA), introduced by Alur and Madhusuan in 2004, is a subclass of pushdown automata whose stack behavior is completely determined by the input symbol according to a fixed partition of the input alphabet. Since its introduce, VPAs have been shown to be useful in various context, e.g., as specification formalism for verification and as automaton model for processing XML streams. Due to high complexity, however, implementation of formal verification based on VPA framework is a challenge. In this paper we consider the problem of implementing VPA-based model checking algorithms. For doing so, we first present an improvement on upper bound for determinization of VPA. Next, we propose simple on-the-fly algorithms to check universality and inclusion problems of this automata class. Then, we implement the proposed algorithms in a prototype tool. Finally, we conduct experiments on randomly generated VPAs. The experimental results show that the proposed algorithms are considerably faster than the standard ones.
The mass of the Delta resonance in a finite volume: fourth-order calculation
Creators: name: Bernard, V.
name: Hoja, D.
name: Meißner, U. -G.
name: Rusetsky, A.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We calculate the self-energy of the Delta (1232) resonance in a finite volume, using chiral effective field theory with explicit spin-3/2 fields. The calculations are performed up-to-and-including fourth order in the small scale expansion and yield an explicit parameterization of the energy spectrum of the interacting pion-nucleon pair in a finite box in terms of both the quark mass and the box size L. It is shown that finite-volume corrections can be sizeable at small quark masses.
description: 21 pages, 7 figures
A Modification of the 10D Superparticle Action Inspired by the Gupta-Bleuler Quantization Scheme
Creators: name: S. Bellucci
name: A. Galajinsky
Publisher: name: INFN Open Access Repository
Year: 1998

description: We reconsider the issue of the existence of a complex structure in the Gupta-Bleuler quantization scheme. We prove an existence theorem for the complex structure associated with the d=10 Casalbuoni-Brink-schwarz superparticle, based on an explicity constructed Lagrangian that allows a holomorphic-antiholomorphic splitting of the fermionic constraints consistent with the vanishing of all first class constraints on the physical states.
Ion regulation in two species of inter-tidal crabs.
Creators: name: Carefoot, Thomas
Publisher: name: University of British Columbia
Year: 2011

description: Estuarine animals are faced with environmental conditions which favour dilution of the body fluids by water uptake and ion loss. The mechanisms employed by two species of estuarine crabs, Hemigrapsus nudus and Hemigrapsus oregonensis, to maintain ionic stability in sea water of varying salinity were investigated. The concentrations of sodium, potassium, calcium and magnesium ions in the blood and urine of these species were measured at eight salinities (6-175% sea water), three temperatures (5°, 15° and 25°C.) and in summer and winter. In dilute salinities (6-75% sea water), concentrations of sodium, potassium and calcium ions in the blood of both species were considerably hypertonic to the media concentrations. In high salinities (100-175% sea water), the concentrations of these ions approached isotonicity with the media. Hypertonic ion regulation appears to be primarily effected by extra-renal mechanisms since the urine-blood ratios (U/B) approximate unity. It is suggested that the principal site of ion uptake in dilute sea water may be the lamellar cells in the gill epithelium. Magnesium ion concentrations in the blood were maintained in both species at constant, hypotonic levels in all salinities above 12% sea water. This appeared to result solely from kidney activity since the U/B magnesium ratios were markedly greater than unity over most of the salinity range. It is thought that low blood magnesium levels are necessary to facilitate neuromuscular impulse transmission. Changes in blood and urine concentrations of sodium, potassium and calcium ions in 25, 75 and 125% sea water required at least 24 hours to be completed, whereas the response of blood concentrations of magnesium ion was comparatively rapid, the major changes occurring after 12 hours. Although seasonal differences in the ability of Hemigrapsus to regulate sodium and potassium were not consistent, in dilute salinities calcium was found to be more effectively regulated by winter animals than by summer ones. Magnesium levels in the blood of both species were equivalent in the two seasons. No effect of temperature on the body fluid concentrations of sodium, potassium, or calcium was demonstrated at either season in Hemigrapsus. The magnesium regulatory mechanism in both species, however, appeared to be gradually impaired as the temperature increased from 5° to 25°C. This may have resulted from a decrease in available energy, since all other metabolic processes were accelerated. Hemigrapsus oregonensis was more effective in regulating winter blood concentrations of sodium in high salinities than H. nudus. The ability to regulate blood magnesium levels was almost identical in the two species. Higher urine magnesium concentrations in H. oregonensis, as compared to H. nudus, were related to the more permeable exoskeleton in the former species.
Empirical Delay Time Distributions of Type Ia Supernovae From The Extended GOODS/HST Supernova Survey
Creators: name: Strolger, Louis-Gregory
name: Dahlen, Tomas
name: Riess, Adam G.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Using the Hubble Space Telescope ACS imaging of the GOODS North and South fields during Cycles 11, 12, and 13, we derive empirical constraints on the delay-time distribution function for type Ia supernovae. We extend our previous analysis to the three-year sample of 56 SNe Ia over the range 0.295% confidence). This result is difficult to resolve with any intrinsic delay-time distribution function (bimodal or otherwise), in which a substantial fraction (e.g., >10%) of events are ``prompt'', requiring less than approximately 1 Gyr to develop from formation to explosion. The result is, however, strongly motivated by the decline in the number of SNe Ia at z>1.2. Sub-samples of the HST-SN data confined to lower redshifts (z<1) show plausible delay-time distributions that are dominated by prompt events, which is more consistent with results from low-redshift supernova samples and supernova host galaxy properties. Scenarios in which a substantial fraction of z>1.2 supernovae are extraordinarily obscured by dust may partly explain the differences in low-z and high-z results. Other possible resolutions may include environmental dependencies (such as gas-phase metallicity) that affect the progenitor mechanism efficiency, especially in the early universe.
description: 12 pages, 9 figures, accepted to the Astrophysical Journal
Top Quark Forward-Backward Asymmetry
Creators: name: Cheung, Kingman
name: Keung, Wai-Yee
name: Yuan, Tzu-Chiang
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The recent forward-backward asymmetry recorded by the CDF Collaboration for the top and anti-top quark pair production indicates more than $2σ$ deviation from the Standard Model prediction, while its total production cross section remains consistent. We propose a $W'$ boson that couples to down and top quarks. We identify the parameter space that can give rise a large enough forward-backward asymmetry without producing too many top and anti-top quark pairs. Other models presented erstwhile in the literature that can produce such effects are also discussed.
description: 11 pages, 3 figures, revtex4, match the published version
Primitive war : a cross-cultural survey.
Creators: name: Levson, Elliott Hastings
Publisher: name: University of British Columbia
Year: 2011

description: Problem: To isolate and analyze the patterned relationships between selected sociological elements and the severity of warfare. Methods of Investigation: Two scales of severity of warfare — based on frequency, and on estimated annual casualties — were constructed for 47 societies. These scales were then compared with 26 selected sociological elements — ranging from population density to political organization. Ethnographic data were obtained from the Human Relations Area File. Conclusions: A model was constructed outlining the organizational bases of the expansion and contraction of warfare: this model isolated two types of factors: I. Conditioning Factors: These referred to the social, economic,political and military organizations on the bases of which warfare expands. II. Limiting Factors: These refer to those institutions which contract warfare. Six basic propositions were postulated as primary influences in the severity of warfare: 1. The greater the size (population), complexity and authority of social, economic and political organizations, the greater is the severity of external warfare. 2. The greater the strength of the social, political, judicial and economic ties — that is interdependence — within a given society or group, the less severe is the internal warfare and the more severe is the external warfare. 3. The greater the structural stress, the greater the severity of the internal warfare. 4. The greater the strength of social, political, and economic ties — i.e., interdependence — between different societies or groups, the less severe is the external warfare. 5. The greater the strength of the institutionalized mechanisms for halting or containing war, the less severe is both internal and external warfare. 6. The greater the strength and occurrence of institutions necessitating warfare for the fulfillment of various roles in society, the greater the severity of warfare.
Additional file 1 of The value on SUV-derived parameters assessed on 18F-FDG PET/CT for predicting mediastinal lymph node metastasis in non-small cell lung cancer
Creators: name: Liao, Xuhe
name: Liu, Meng
name: Li, Shanshi
name: Huang, Weiming
name: Guo, Cuiyan
name: Liu, Jia
name: Xiong, Yan
name: Zhang, Jianhua
name: Fan, Yan
name: Wang, Rongfu
Publisher: name: figshare
Year: 2023
Subjects: subject: Space Science
subject: Medicine
subject: Cell Biology
subject: Molecular Biology
subject: Biological Sciences not elsewhere classified
subject: Cancer
subject: Plant Biology
subject: FOS: Biological sciences

description: Additional file 1. Supplementary Table 1. Association between other clinical variables and situation of mediastinal lymph nodes in 224 NSCLC patients. Supplementary Table 2. Univariate Logistic regression analysis of predictive factors without significance for mediastinal lymph node in NSCLC patients.
An Inverse Method for Policy-Iteration Based Algorithms
Creators: name: Fribourg, Laurent
name: André, Etienne
Publisher: name: arXiv
Year: 2009
Subjects: subject: Discrete Mathematics (cs.DM)
subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences
subject: F.4.3; F.4.1

description: We present an extension of two policy-iteration based algorithms on weighted graphs (viz., Markov Decision Problems and Max-Plus Algebras). This extension allows us to solve the following inverse problem: considering the weights of the graph to be unknown constants or parameters, we suppose that a reference instantiation of those weights is given, and we aim at computing a constraint on the parameters under which an optimal policy for the reference instantiation is still optimal. The original algorithm is thus guaranteed to behave well around the reference instantiation, which provides us with some criteria of robustness. We present an application of both methods to simple examples. A prototype implementation has been done.
Business Strategic Integration of Composite Material for Corrosion Mitigation in Oil and Gas Pipelines
Creators: name: Qaed, Mohamed
Publisher: name: American University of Bahrain
Year: 2025
Subjects: classificationCode: 4011
subject: Environmental engineering
subject: FOS: Environmental engineering
classificationCode: 401404
subject: Industrial engineering
classificationCode: 400803
subject: Electrical energy generation (incl. renewables, excl. photovoltaics)

description: The oil and gas sector in the Middle East remain a standard of economic stability despite the potential global shift towards renewable energy sources. Corrosion stands out as a continuous issue to pipeline infrastructure integrity, particularly in environments saturated with hydrogen sulphide (H2S), increasing leaks and consequential economic losses. This thesis studies the potential of Reinforced Thermoplastic Pipe (RTP) as an anti-corrosive alternative to carbon steel pipelines within the oil and gas domain. RTP showcases heightened durability and operational efficiency, proffering a viable and economic solution to the corrosion issues that affect conventional pipelines. This study involves the use of empirical research and reviewing studies as a methodology and through the analyses of material characteristics, environmental ramifications, and other considerations. This study provides invaluable discernments for industry economic impacts and current practice issues through SWOT analysis and comparing real experimental data collected directly from an esteemed oil and gas industry in the Middle East. The study highlights the importance of maintaining oil and gas production to support the economy, while also pointing out the risks of corrosion in metal pipelines. Comparing RTP with traditional pipelines, or other anti-corrosive material in terms of cost and lifecycle the research aims to offer practical recommendation to industry leaders on using RTP technology strategically to reduce corrosion risks, improve operations, and minimize financial losses due to pipeline maintenance and downtime. In addition, this research also includes how and where to use such technologies to ensure the maximum lifecycle and performance gained from this change. The study found composite material pipelines as economically feasible, when implementing a financial strategy and an installation method strategy.
MPEC 2023-X285 : 2023 FO13
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Phenomenology of the constrained NMSSM
Creators: name: Djouadi, A.
name: Ellwanger, U.
name: Teixeira, A. M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss several phenomenological aspects of the fully constrained version of the next-to-minimal supersymmetric extension of the standard model (cNMSSM). Assuming universal boundary conditions at a high energy scale for the soft supersymmetry-breaking gaugino, sfermion and Higgs masses as well as for the trilinear interactions, we find that the model can satisfy all present constraints from colliders and cosmological data on dark matter, B- and muon-physics. The phenomenologically viable region of the parameter space of the cNMSSM can be described by essentially one single parameter as the universal gaugino mass parameter M_{1/2}, and corresponds to small values for the universal scalar mass m_0. The lightest supersymmetric particle is always a singlino-like neutralino that is almost degenerate with the lightest tau slepton. We study the particle spectrum of the model and its signatures at the LHC, such as possibly long-lived tau sleptons at the end of decay chains, that would distinguish the cNMSSM from the constrained MSSM.
description: 30 pages, 14 figures, references and comments added
CO in OH/IR stars close to the Galactic centre
Creators: name: Winnberg, A.
name: Deguchi, S.
name: Reid, M. J.
name: Nakashima, J.
name: Olofsson, H.
name: Habing, H. J.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Aims: A pilot project has been carried out to measure circumstellar CO emission from three OH/IR stars close to the Galactic centre. The intention was to find out whether it would be possible to conduct a large-scale survey for mass-loss rates using, for example, the Atacama Large Millimeter Array (ALMA). Such a survey would increase our understanding of the evolution of the Galactic bulge. Methods: Two millimetre-wave instruments were used: the Nobeyama Millimeter Array at 115 GHz and the Submillimeter Array at 230 GHz. An interferometer is necessary as a `spatial filter' in this region of space because of the confusion with interstellar CO emission. Results: Towards two of the stars, CO emission was detected with positions and radial velocities coinciding within the statistical errors with the corresponding data of the associated OH sources. However, for one of the stars the line profile is not what one expects for an unresolved expanding circumstellar envelope. We believe that this CO envelope is partially resolved and that this star therefore is a foreground star not belonging to the bulge. Conclusions: The results of the observations have shown that it is possible to detect line profiles of circumstellar CO from late-type stars both within and in the direction of the Galactic bulge. ALMA will be able to detect CO emission in short integrations with sensitivity sufficient to estimate mass-loss rates from a large number of such stars.
description: 5 pages, 3 figures
Real-time dynamics of the Chiral Magnetic Effect
Creators: name: Fukushima, Kenji
name: Kharzeev, Dmitri E.
name: Warringa, Harmen J.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In quantum chromodynamics, a gauge field configuration with nonzero topological charge generates a difference between the number of left- and right-handed quarks. When a (electromagnetic) magnetic field is added to this configuration, an electromagnetic current is induced along the magnetic field; this is called the chiral magnetic effect. We compute this current in the presence of a color flux tube possessing topological charge, with a magnetic field applied perpendicular to it. We argue that this situation is realized at the early stage of relativistic heavy-ion collisions.
description: 4 pages, 3 figures, Revtex
Infinite random geometric graphs
Creators: name: Bonato, Anthony
name: Janssen, Jeannette
Publisher: name: arXiv
Year: 2009
Subjects: subject: Combinatorics (math.CO)
subject: Metric Geometry (math.MG)
subject: FOS: Mathematics
subject: 05C75, 05C80, 46B04, 54E35

description: We introduce a new class of countably infinite random geometric graphs, whose vertices are points in a metric space, and vertices are adjacent independently with probability p if the metric distance between the vertices is below a given threshold. If the vertex set is a countable dense set in R^n equipped with the metric derived from the L_{\infty}-norm, then it is shown that with probability 1 such infinite random geometric graphs have a unique isomorphism type. The isomorphism type, which we call GR_n, is characterized by a geometric analogue of the existentially closed adjacency property, and we give a deterministic construction of GR_n. In contrast, we show that infinite random geometric graphs in R^2 with the Euclidean metric are not necessarily isomorphic.
description: 17 pages, 4 figures
Dose-response analysis of published data on arsenic and cancer
Creators: name: Ritz, Christian
Publisher: name: Zenodo
Year: 2023
Subjects: benchmark dose
bladder cancer
Poisson distribution
log-logistic model
person-years

description: In this note, generalized linear and nonlinear dose-response models for counts were fitted and compared for data on the relationship between arsenic concentration and cancer cases. A novel aspect is the use of follow-up time in a nonlinear dose-response model for count data, in the same way as in an ordinary log-linear Poisson model.
Automated Predicate Abstraction for Real-Time Models
Creators: name: Badban, Bahareh
name: Leue, Stefan
name: Smaus, Jan-Georg
Publisher: name: arXiv
Year: 2009
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Formal Languages and Automata Theory (cs.FL)
subject: FOS: Computer and information sciences
subject: F.4.3; F.4.1

description: We present a technique designed to automatically compute predicate abstractions for dense real-timed models represented as networks of timed automata. We use the CIPM algorithm in our previous work which computes new invariants for timed automata control locations and prunes the model, to compute a predicate abstraction of the model. We do so by taking information regarding control locations and their newly computed invariants into account.
Mars Before the Space Age
Creators: name: Jones, Barrie W
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: Popular Physics (physics.pop-ph)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: Mars has surely been scrutinised since the dawn of humankind. In the 16th century Tycho Brahe made accurate observations of the position of Mars that enabled Johannes Kepler to obtain his first two laws of planetary motion. In the 17th century the first telescope observations were made, but very little surface detail could be discerned. Throughout the 18th and 19th centuries telescopes improved, revealing many dark areas on the red tinted surface. After the close opposition of 1877 Giovanni Schiaparelli announced about 40 canali on Mars. This led to the saga of the canals of Mars, laid to rest in 1971 when Mariner 9 made observations from Martian orbit showing that the canali/canals of Mars do not exist. Belief that there was life on Mars was widespread in the 19th century, including the view that the dark areas were some form of plant life. This view persisted until Mariner 4 flew past Mars in 1965 and discovered a far thinner atmosphere than previously thought, with impact craters dominating the images. It was Mariner 9 that revealed much more promising landscapes. Thus, the contemporary era of Mars exploration began. Our picture of Mars today is not only much more complete that that before Mariner 4, in several ways it is quite different. The belief however, that there may be life on Mars persists - subsurface life cannot be ruled out and, failing that, there might be ancient fossils on Mars.
description: 13 pages as published, 13 Figures
Electromagnetic meson form factor from a relativistic coupled-channel approach
Creators: name: Biernat, Elmar P.
name: Fuchsberger, Kajetan
name: Klink, William H.
name: Schweiger, Wolfgang
Publisher: name: arXiv
Year: 2009
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Point-form relativistic quantum mechanics is used to derive an expression for the electromagnetic form factor of a pseudoscalar meson for space-like momentum transfers. The elastic scattering of an electron by a confined quark-antiquark pair is treated as a relativistic two-channel problem for the $q\bar{q}e$ and $q\bar{q}eγ$ states. With the approximation that the total velocity of the $q\bar{q}e$ system is conserved at (electromagnetic) interaction vertices this simplifies to an eigenvalue problem for a Bakamjian-Thomas type mass operator. After elimination of the $q\bar{q}eγ$ channel the electromagnetic meson current and form factor can be directly read off from the one-photon-exchange optical potential. By choosing the invariant mass of the electron-meson system large enough, cluster separability violations become negligible. An equivalence with the usual front-form expression, resulting from a spectator current in the $q^+=0$ reference frame, is established. The generalization of this multichannel approach to electroweak form factors for an arbitrary bound few-body system is quite obvious. By an appropriate extension of the Hilbert space this approach is also able to accommodate exchange-current effects.
description: 30 pages, 5 figures
title: Konpetentzia digitalak. Graduko ikasleentzako formakuntza materialak: 1. Informazioa eta datuen tratamendua 1.2. Informazioaren, datuen eta eduki digitalen ebaluazioa 1.2.4. Argitalpen zientifikoen ebaluazio irizpideak
title: Competencias digitales. Materiales de formación para estudiantes de grado: 1. Información y tratamiento de datos 1.2. Evaluación de información, datos y contenidos digitales 1.2.4. Criterios de evaluación de las publicaciones científicas
Creators: name: CRUE-REBIUN
name: Mondragon Unibertsitatea
Publisher: name: Mondragon Unibertsitatea
Year: 2020

description: Argitalpen zientifikoak. Argitalpen zientifikoak ebaluatzeko irizpideak: edukia, egiletza, argitaletxea...Aipuei begirada bat. Gehiago jakiteko...
description: Publicaciones científicas. Criterios de evaluación de las publicaciones científicas: contenido, autoría, editorial...Un vistazo a las citas. Para saber más...
Numerical Study of the Frequency and Temperature Dependence of the ac Magnetic Field in HTS
Creators: name: D. Di Gioacchino
name: P. Tripodi
name: F. Celani
name: A.M. Testa
name: S. Pace
Publisher: name: INFN Open Access Repository
Year: 1998

description: The temperature dependence of the harmonics (cn) of the ac magnetic susceptibility  in HTS have been investigated by numerical solutions of the non linear diffusion equation for the magnetic flux. Within the framework of the collective pinning model, we show that the transition between different regimes for the flux dynamics (taff, creep, flow) is determined by the field frequency for a fixed dc field, or by the dc field for a fixed frequency. As a consequence, a non universal behavior arises for the temperature dependence of cn. In particular, in this approach the frequency dependencies of both  amplitude and temperature of the peak of the imaginary part of the first harmonic and of the modulus of the third harmonic are discussed.
Nernst effect of Dirac fermions in graphene under weak magnetic field
Creators: name: Yan, Xin-Zhong
name: Ting, C. S.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The derivation for the transport coefficients of an electron system in the presence of temperature gradient and the electric and magnetic fields are presented. The Nernst conductivity and the transverse thermoelectric power of the Dirac fermions in graphene under charged impurity scatterings and weak magnetic field are calculated on basis of the self-consistent Born approximation. The result is compared with so far the available experimental data.
description: 9 pages, 4 figures
Coherent and Incoherent Components of a Synchrotron Radiation Spot Produced by Separate Capillaries
Creators: name: Dabagov, Sultan B.
name: Marcelli, Augusto
name: Murashova, Violetta A.
name: Svyatoslavsky, Nikolai L.
name: Fedorchuk, Rustem V.
name: Yakimenko, Mikhail N.
name: P.N. Lebedev
Publisher: name: INFN Open Access Repository
Year: 1999

description: In this work the focusing properties of soft X-ray synchrotron radiation by separate capil-laries are discussed. It is shown that a not negligible fraction of the synchrotron radiation beam transmitted by the capillary has a mode representation. Experimental and theoretical data are discussed to explain the superposition pattern of the X-rays in the focal plane due to the interference phenomena of electromagnetic radiation propagating through separate capillaries.
Beyond Kinetic Relations
Creators: name: Truskinovsky, Lev
name: Vainchtein, Anna
Publisher: name: arXiv
Year: 2009
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We introduce the concept of kinetic equations representing a natural extension of the more conventional notion of a kinetic relation. Algebraic kinetic relations, widely used to model dynamics of dislocations, cracks and phase boundaries, link the instantaneous value of the velocity of a defect with an instantaneous value of the driving force. The new approach generalizes kinetic relations by implying a relation between the velocity and the driving force which is nonlocal in time. To make this relations explicit one needs to integrate the system of kinetic equations. We illustrate the difference between kinetic relation and kinetic equations by working out in full detail a prototypical model of an overdamped defect in a one-dimensional discrete lattice. We show that the minimal nonlocal kinetic description containing now an internal time scale is furnished by a system of two ordinary differential equations coupling the spatial location of defect with another internal parameter that describes configuration of the core region.
description: Revised version, 33 pages, 9 figures
Additional file 2 of Effects of regional cerebral oxygen saturation monitoring on postoperative cognitive dysfunction in older patients: a systematic review and meta-analysis
Creators: name: Ding, Xiahao
name: Zha, Tianming
name: Abudurousuli, Gulibositan
name: Zhao, Cuimei
name: Chen, Zixuan
name: Zhang, Yang
name: Gui, Bo
Publisher: name: figshare
Year: 2023
Subjects: subject: Medicine
subject: Cell Biology
subject: Immunology
subject: FOS: Clinical medicine
subject: Marine Biology
subject: Cancer
subject: Science Policy

description: Supplementary Material 2
Accurate numerical verification of the instanton method for macroscopic quantum tunneling: dynamics of phase slips
Creators: name: Danshita, Ippei
name: Polkovnikov, Anatoli
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Instanton methods, in which imaginary-time evolution gives the tunneling rate, have been widely used for studying quantum tunneling in various contexts. Nevertheless, how accurate instanton methods are for the problems of macroscopic quantum tunneling (MQT) still remains unclear because of lack of their direct comparison with exact time evolution of the many-body Schroedinger equation. Here, we verify instanton methods applied to coherent MQT. Specifically applying the quasi-exact numerical method of time-evolving block decimation to the system of bosons in a ring lattice, we directly simulate the real-time quantum dynamics of supercurrents, where a coherent oscillation between two macroscopically distinct current states occurs due to MQT. The tunneling rate extracted from the coherent oscillation is compared with that given by the instanton method. We show that the error is within 10% when the effective Planck's constant is sufficiently small. We also discuss phase slip dynamics associated with the coherent oscillations.
description: 19 pages, 14 figures, 1 table
Resolvent expansions on hybrid manifolds
Creators: name: Pankrashkin, Konstantin
name: Roganova, Svetlana
name: Yeganefar, Nader
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We study Laplace-type operators on hybrid manifolds, i.e. on configurations consisting of closed two-dimensional manifolds and one-dimensional segments. Such an operator can be constructed by using the Laplace-Beltrami operators on each component with some boundary conditions at the points of gluing. The large spectral parameter expansion of the trace of the second power of the resolvent is obtained. Some questions of the inverse spectral theory are adressed.
description: To appear in Integral Equations and Operator Theory (2011)
Thickness determination of thin polycrystalline film by grazing incidence X-ray diffraction
Creators: name: J. Lhotka
name: R. Kuzel
name: G. Cappuccio
name: V. Valvoda
Publisher: name: INFN Open Access Repository
Year: 2000

description: Three methods of thickness measurement based on absorption of X-rays in thin films were tested on polycrystalline titanium nitride film deposited on tungsten carbide substrate. The intensities of three reflections from each material were measured in the incidence range from 3∘ to 35∘ of the primary beam. After experimental correction for texture effects, data from the TiN film, the WC substrate or from their ratio were fitted by known functions using least squares routines. The substrate reflection intensities were found to be the most suitable for determining the thickness of the overlaying thin film. The average thickness of TiN film (2.0 ± 0.16  μm) determined from the substrate reflections was in fair agreement with the average value obtained from optical microscopy (2.2 ± 0.8  μm). The use of substrate reflections is generally preferable unless their intensities are spoiled by statistical errors (e.g., low intensity, grain size effect, texture etc.). The method based on the ratio thin-film/substrate reflection intensities is not complicated by correlation of the least square parameters but suffers strongly from accumulated experimental errors.