cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Infrared catastrophe and tunneling into strongly correlated electron systems: Beyond the x-ray edge limit
Creators: name: Patton, Kelly R.
name: Geller, Michael R.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We develop a nonperturbative method to calculate the electron propagator in low-dimensional and strongly correlated electron systems. The method builds on our earlier work using a Hubbard-Stratonovich transformation to map the tunneling problem to the x-ray edge problem, which accounts for the infrared catastrophe caused by the sudden introduction of a new electron into a conductor during a tunneling event. Here we use a cumulant expansion to include fluctuations about this x-ray edge limit. We find that the dominant effect of electron-electron interaction at low energies is to correct the noninteracting Green's function by a factor exp(-S), where S can be interpreted as the Euclidean action for a density field describing the time-dependent charge distribution of the newly added electron. Initially localized, this charge distribution spreads in time as the electron is accommodated by the host conductor, and during this relaxation process action is accumulated according to classical electrostatics with a screened interaction. The theory applies to lattice or continuum models of any dimensionality, with or without translational invariance. In one dimension the method correctly predicts a power-law density of states (DOS) for electrons with short-range interaction and no disorder, and when applied to the solvable Tomonaga-Luttinger model, the exact DOS is obtained.
description: 8 pages, Revtex
Euaspidoceras lytoceroide
Creators: name: Cecca, Fabrizio
name: Savary, Bérengère
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Cephalopoda
Ammonitida
Aspidoceratidae
Euaspidoceras
Euaspidoceras lytoceroide

description: Euaspidoceras cf. lytoceroide ? (Gemmellaro, 1876) (Fig. 7D)
MATERIAL EXAMINED. — MI3 9/9.
STRATIGRAPHIC DISTRIBUTION. — Bed 9 of section Castello Inici, which has been assigned to the Middle Oxfordian Plicatilis Zone.
DESCRIPTION
The specimen is an eroded internal mold of an aspidoceratid whose size is approximately 85 mm. The inner whorls are dissolved but traces of ventrolateral tubercles are visible from a diameter of 7 mm. Eight tubercles per whorl exist at a diameter of approximately 21 mm. No traces of umbilical tubercles and ribs are visible. The preserved portion of the last whorl shows traces of ventrolateral tubercles and corroded folds that likely are rib remains. Because any traces of suture lines are visible it is impossible to state whether this specimen bears the body chamber or not.
Due to the incomplete preservation, measurements cannot be taken.
DISCUSSION
 The preservation of the specimen is extremely poor but the tubercles of the inner whorls and the coiling aspect suggest a tentative comparison with E. lytoceroide.
description: Published as part of Cecca, Fabrizio & Savary, Bérengère, 2007, Palaeontological study of Middle Oxfordian- Early Kimmeridgian (Late Jurassic) ammonites from the Rosso Ammonitico of Monte Inici (north-western Sicily, Italy), pp. 507-548 in Geodiversitas 29 (4) on page 534, DOI: 10.5281/zenodo.4651042
Non-perturbative Heavy Quark Effective Theory
Creators: name: Heitger, Jochen
name: Sommer, Rainer
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We explain how to perform non-perturbative computations in HQET on the lattice. In particular the problem of the subtraction of power-law divergences is solved by a non-perturbative matching of HQET and QCD. As examples, we present a full calculation of the mass of the b-quark in the combined static and quenched approximation and outline an alternative way to obtain the B-meson decay constant at lowest order. Since no excessively large lattices are required, our strategy can also be applied including dynamical fermions.
description: 27 pages including figures and tables, latex2e; version published in JHEP, typos corrected and 1 reference added
Strong Gravitational Lensing and Dark Energy Complementarity
Creators: name: Linder, Eric V.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In the search for the nature of dark energy most cosmological probes measure simple functions of the expansion rate. While powerful, these all involve roughly the same dependence on the dark energy equation of state parameters, with anticorrelation between its present value w_0 and time variation w_a. Quantities that have instead positive correlation and so a sensitivity direction largely orthogonal to, e.g., distance probes offer the hope of achieving tight constraints through complementarity. Such quantities are found in strong gravitational lensing observations of image separations and time delays. While degeneracy between cosmological parameters prevents full complementarity, strong lensing measurements to 1% accuracy can improve equation of state characterization by 15-50%. Next generation surveys should provide data on roughly 10^5 lens systems, though systematic errors will remain challenging.
description: 7 pages, 5 figures
AN OPEN LETTER TO THE SCIENTIFIC COMMUNITY ON THE POSSIBLE ROLE OF DYSREGULATED BRADYKININ SIGNALING IN COVID-19 RESPITORY COMPLICATIONSAN OPEN LETTER TO THE SCIENTIFIC COMMUNITY ON THE POSSIBLE ROLE OF DYSREGULATED BRADYKININ SIGNALING IN COVID-19 RESPIRATORY COMPLICATIONSAN OPEN LETTER TO THE SCIENTIFIC COMMUNITY ON THE POSSIBLE ROLE OF DYSREGULATED BRADYKININ SIGNALING IN COVID-19 RESPIRATORY COMPLICATIONS
Creators: name: Roche, Joseph
name: Roche, Renuka
Publisher: name: figshare
Year: 2020
Subjects: subject: Pharmacology
subject: Pathology
subject: Physiology
subject: FOS: Biological sciences
subject: 60502 Infectious Agents
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: In this Open Letter to the Scientific Community, we propose a model for dysregulated bradykinin signaling in COVID-19 respiratory complications. Based on our model, we suggest the off-label and compassionate use of the FDA-approved bradykinin receptor blocker, icatibant, for patients with unremitting respiratory distress from COVID-19.
Dominant galaxies in 2dF groups
Creators: name: Kelm, B.
name: Focardi, P.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate whether the spectral-type of a locally dominant (most luminous) galaxy can be used to select sets of galaxies that are physically associated (groups). We assume that passive dominants trace a group-like potential, and SF-dominants a field-like environment. The group sample includes 988 groups selected in the 2dFGRS applying a maximum magnitude difference criterion. We find that the average number of passive galaxies associated to a dominant is larger when the dominant is passive, a result supporting our assumption that galaxy associations around a passive dominant are reliable groups. Finally we show that, to reduce the contamination by unbound galaxy associations (SF-dominant), a >=3 passive-members criterion is more efficient than a >=6 all-members criterion.
description: 3 pages, 2 figures, to appear in ''Outskirts of galaxy clusters: intense life in the suburbs'' ed. A. Diferio, Proceedings of IAU Coll. No. 195, 2004
Investigation into Sustainable Light Bulbs
Creators: name: Chow, Jonathan
name: Lee, Tsung-Yu (John)
name: Risi, Steven
name: Wang, Xia Zhong (Leon)
Publisher: name: The University of British Columbia
Year: 2010

description: Disclaimer: “UBC SEEDS provides students with the opportunity to share the findings of their studies, as well as their opinions, conclusions and recommendations with the UBC community. The reader should bear in mind that this is a student project/report and is not an official document of UBC. Furthermore readers should bear in mind that these reports may not reflect the current status of activities at UBC. We urge you to contact the research persons mentioned in a report or the SEEDS Coordinator about the current status of the subject matter of a project/report.”
title: Fabrication and mechanical characterization of hydrogel-based 3D cell-like structures
Creators: name: Kumar, Randhir
name: Dzikonski, Dustin
name: Bekker, Elena
name: Vornhusen, Robert
name: Vitali, Valerio
name: Imbrock, Jörg
name: Denz, Cornelia
Publisher: name: University of Muenster, Institutional Repository MIAMI
Year: 2024
Subjects: subject: 530 Physics

description: In this article, we demonstrate the fabrication of 3D cell-like structures using a femtosecond laser-based two-photon polymerization technique. By employing poly(ethylene glycol) diacrylate monomers as a precursor solution, we fabricate 3D hemispheres that resemble morphological and biomechanical characteristics of natural cells. We employ an optical tweezers-based microrheology technique to measure the viscoelastic properties of the precursor solutions inside and outside the structures. In addition, we demonstrate the interchangeability of the precursor solution within fabricated structures without impairing the microstructures. The combination of two-photon polymerization and microrheological measurements by optical tweezers demonstrated here represents a powerful toolbox for future investigations into cell mimic and artificial cell studies.
description: Finanziert durch den Open-Access-Publikationsfonds der Universität Münster.
ByzRev 03.2021.011: Steffen Patzold, Wie regierte Karl der Große?
Creators: name: Grünbart, Michael
Publisher: name: The Byzantine Review
Year: 2021

description: Steffen Patzold, Wie regierte Karl der Große? Listen und Politik in der frühen Karolingerzeit (Sigurd Greven-Vorlesungen 2020). Köln: Greven Verlag 2020. 128 S. – ISBN: 978-3-7743-0929-6 (€ 10.00)
description: The Byzantine Review, Bd. 3 (2021)
PROFIT-SHARING AND PRODUCTIVITY: AN INTERNATIONAL COMPARISON
Creators: name: Cable, John
name: Wilson, Nicholas
name: Cable, John
name: Wilson, Nicholas
Publisher: name: Unknown
Year: 1988
Subjects: Industrial Organization
Productivity Analysis

description: using a common estimating framework and comparable, primary data for two samples of firms in the British and West German engineering industries, the paper reports productivity differentials of 20-30% in favour of firms practising profit-sharing in West Germany, and 3-8% in Britain. Model selection procedures reveal important interactions between profit-sharing and other firm characteristics in both cases. We infer (a) that the observed differentials therefore capture the joint effects of a set of organisational choices of which profit-sharing is one element, and (b) that from a policy viewpoint, profit-sharing must be seen as part of a more general, organisational design process, rather than as an optional, add-on extra, as in some previous work and policy discussion. However, the characteristics of British and West German profit-sharers turn out to be quite different, indicating that there is evidently no single, stereotype formula for the effective use of profit-sharing.
Monotonically equivalent entropies and solution of additivity equation
Creators: name: Gorban, Pavel
Publisher: name: arXiv
Year: 2003
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: Computational Physics (physics.comp-ph)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: Generalized entropies are studied as Lyapunov functions for the Master equation (Markov chains). Three basic properties of these Lyapunov functions are taken into consideration: universality (independence of the kinetic coefficients), trace-form (the form of sum over the states), and additivity (for composition of independent subsystems). All the entropies, which have all three properties simultaneously and are defined for positive probabilities, are found. They form a one-parametric family. We consider also pairs of entropies $S_{1}$, $S_{2}$, which are connected by the monotonous transformation $S_{2}=F(S_{1})$ (equivalent entropies). All classes of pairs of universal equivalent entropies, one of which has a trace-form, and another is additive (these entropies can be different one from another), were found. These classes consist of two one-parametric families: the family of entropies, which are equivalent to the additive trace-form entropies, and the family of Renyi-Tsallis entropies.
description: elsart-LaTeX2e, 11 pages
Cosmological Bounds on sub-GeV Dark Vector Bosons from Electromagnetic Energy Injection
Creators: name: Coffey, John
name: Forestell, Lindsay
name: Morrissey, David E.
name: White, Graham
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: New dark vector bosons that couple very feebly to regular matter can be created in the early universe and decay after the onset of big bang nucleosynthesis (BBN) or the formation of the cosmic microwave background (CMB) at recombination. The energy injected by such decays can alter the light element abundances or modify the power and frequency spectra of the CMB. In this work we study the constraints implied by these effects on a range of sub-GeV dark vectors including the kinetically mixed dark photon, and the $B-L$, $L_e-L_μ$, $L_e-L_τ$ , and $L_μ-L_τ$ dark U(1) bosons. We focus on the effects of electromagnetic energy injection, and we update previous investigations of dark photon and other dark vector decays by taking into account non-universality in the photon cascade spectrum relevant for BBN and the energy dependence of the ionization efficiency after recombination in our treatment of modifications to the CMB.
description: 36 pages 7 figures. Added citations and prepared for submission
COHERENT SPECIFICATION OF DEMAND SYSTEMS WITH CORNER SOLUTIONS AND ENDOGENOUS REGIMES
Creators: name: Van Soest, Arthur
name: Kooreman, Peter
name: Kapteyn, Arie
name: Van Soest, Arthur
name: Kooreman, Peter
name: Kapteyn, Arie
Publisher: name: Unknown
Year: 1988
Subjects: Agricultural and Food Policy
Demand and Price Analysis

description: We seek to provide fairly general conditions that may be imposed on parameters in order that any empirical consumer demand system is consistent with utility maximization. In standard demand systems the imposition of these regularity conditions is less essential than in more complex situations, like when there is rationing or when there are endogenously switching regimes. The paper starts out by giving a number of examples where the failure to properly take into account restrictions following from neoclassical theory leads to models that are not internally coherent. Let 0 be the space of parameters which generate internally coherent models. We show that even if the true parameter vector belongs to 0, failure to constrain the parameter estimates to 0 in "maximum likelihood" estimation may yield inconsistent estimates outside of 0. Next a general framework is provided in which it is possible to formulate parameter restrictions which guarantee utility consistent models. For various cases (standard demand systems, rationing, endogenous regimes) we suggest general conditions that can be imposed in order to guarantee coherency of the empirical model. Since random parameter variation is allowed for, to capture non-systematic differences in preferences across individuals, the conditions also imply restrictions on the stochastic specification of an empirical model. For a number of familiar demand systems we show what the parameter restrictions amount to in practice.
Probing AGB nucleosynthesis via accurate Planetary Nebula abundances
Creators: name: Marigo, P.
name: Bernard-Salas, J.
name: Pottasch, S. R.
name: Tielens, A. G. G. M.
name: Wesselius, P. R.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The elemental abundances of ten planetary nebulae, derived with high accuracy including ISO and IUE spectra, are analysed with the aid of synthetic evolutionary models for the TP-AGB phase. Model prescriptions are varied until we achieve the simultaneous reproduction of all elemental features, which allows placing important constraints on the characteristic masses and nucleosynthetic processes experienced by the stellar progenitors. First of all, it is possible to separate the sample into two groups of PNe, one indicating the occurrence of only the third dredge-up during the TP-AGB phase, and the other showing also the chemical signature of hot-bottom burning. The former group is reproduced by stellar models with variable molecular opacities (see Marigo 2002), adopting initial solar metallicity, and typical efficiency of the third dredge-up 0.3-0.4. The latter group of PNe, with extremely high He content 0.15<=He/H<=0.20 and marked oxygen deficiency, is consistent with original sub-solar metallicity (i.e. LMC composition). Moreover, we are able to explain quantitatively both the N/H-He/H correlation and the N/H-C/H anti-correlation, thus solving the discrepancy pointed out long ago by Becker & Iben (1980). This is obtained only under the hypothesis that intermediate-mass TP-AGB progenitors (M > 4.5-5.0 Mo) with LMC composition have suffered a number of very efficient, carbon-poor, dredge-up events. Finally, the neon abundances of the He-rich PNe can be recovered by invoking a significant production of 22Ne during thermal pulses, which would imply a reduced role of the 22Ne(alpha,n)25Mg reaction as neutron source to the s-process nucleosynthesis in these stars.
description: 22 pages, accepted for publication in Astronomy & Astrophysics
title: Identification and Characterization of Tumour Initiating Cells From Gynaecological Malignancies
Creators: name: Bortolomai, Ileana
Publisher: name: The Open University
Year: 2011

description: In the first part of the study, I developed a model to study the CSC/TIC population of the A431 cell line based on the capability of these cells to form spheres in suspension.

 Putative A431 CSC/TIC were characterized for ‘stemness’ properties such as self-renewal and clone forming capability, presence of a SP and ALDH enzymatic activity, putative stem cell marker expression and in vivo tumorigenicity. The results indicate that the growth of A431 cells, as spheres, was not sufficient by itself to define a stem like population, but it was essential for the emergence of a small population of tumour cells with CSC properties. Then, I investigated CSC/TIC in Epithelial Ovarian Cancer (EOC), with a focus on CD133 and CXCR4 molecules. In a wide range of primary EOC and ascites the expression of CD133 and CXCR4 was found restricted within two separate subpopulations of tumour cells.

 Enrichment in mRNA levels of OCT4, NANOG and NESTIN was observed with good reproducibility in CXCR4 positive cells, whereas it was more variable in CD133 positive cells. Real Time analyses of ABC transporter expression showed there was a slight increase in CXCR4 positive cells while in CD133 positive cells this increase was much more evident, revealing a clear difference between CXCR4 and CD133 subpopulations in term of chemoresistance potential. Furthermore positive cells isolated from xenograft-derived ascites and sorted for CXCR4 and CD133 were not characterized by higher tumorigenic capacity.

 In summary, no correlation between CD133 positivity and the ovarian cancer sternness phenotype was found. However detection of CD133 positive cells may be useful to predict the efficacy of specific cytotoxic therapy.

 On the contrary, CXCR4 positive cells may identify those tumour cells which maintain a partially un-differentiated state (high levels of stem cell marker expression) and possibly responsible for tumour invasion and metastasis.
Sparse Matrix-Based HPC Tomography
Creators: name: Marchesini, Stefano
name: Trivedi, Anuradha
name: Enfedaque, Pablo
name: Perciano, Talita
name: Parkinson, Dilworth
Publisher: name: arXiv
Year: 2020
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: Tomographic imaging has benefited from advances in X-ray sources, detectors and optics to enable novel observations in science, engineering and medicine. These advances have come with a dramatic increase of input data in the form of faster frame rates, larger fields of view or higher resolution, so high performance solutions are currently widely used for analysis. Tomographic instruments can vary significantly from one to another, including the hardware employed for reconstruction: from single CPU workstations to large scale hybrid CPU/GPU supercomputers. Flexibility on the software interfaces and reconstruction engines are also highly valued to allow for easy development and prototyping. This paper presents a novel software framework for tomographic analysis that tackles all aforementioned requirements. The proposed solution capitalizes on the increased performance of sparse matrix-vector multiplication and exploits multi-CPU and GPU reconstruction over MPI. The solution is implemented in Python and relies on CuPy for fast GPU operators and CUDA kernel integration, and on SciPy for CPU sparse matrix computation. As opposed to previous tomography solutions that are tailor-made for specific use cases or hardware, the proposed software is designed to provide flexible, portable and high-performance operators that can be used for continuous integration at different production environments, but also for prototyping new experimental settings or for algorithmic development. The experimental results demonstrate how our implementation can even outperform state-of-the-art software packages used at advanced X-ray sources worldwide.
A Neural Network Based on First Principles
Creators: name: Baggenstoss, Paul M
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: In this paper, a Neural network is derived from first principles, assuming only that each layer begins with a linear dimension-reducing transformation. The approach appeals to the principle of Maximum Entropy (MaxEnt) to find the posterior distribution of the input data of each layer, conditioned on the layer output variables. This posterior has a well-defined mean, the conditional mean estimator, that is calculated using a type of neural network with theoretically-derived activation functions similar to sigmoid, softplus, and relu. This implicitly provides a theoretical justification for their use. A theorem that finds the conditional distribution and conditional mean estimator under the MaxEnt prior is proposed, unifying results for special cases. Combining layers results in an auto-encoder with conventional feed-forward analysis network and a type of linear Bayesian belief network in the reconstruction path.
Aspidoceras Zittel 1868
Creators: name: Cecca, Fabrizio
name: Savary, Bérengère
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Cephalopoda
Ammonitida
Aspidoceratidae
Aspidoceras

description: Genus Aspidoceras Zittel, 1868
 TYPE SPECIES. — Ammonites rogoznicensis Zeuschner, 1846.
description: Published as part of Cecca, Fabrizio & Savary, Bérengère, 2007, Palaeontological study of Middle Oxfordian- Early Kimmeridgian (Late Jurassic) ammonites from the Rosso Ammonitico of Monte Inici (north-western Sicily, Italy), pp. 507-548 in Geodiversitas 29 (4) on page 536, DOI: 10.5281/zenodo.4651042
Appraisal of Measures in Enhancing Professionalism and Ethical Conducts among Quantity Surveyors in Nigerian Construction Industry
Creators: name: AKINRATA EBUNOLUWA
Publisher: name: figshare
Year: 2020
Subjects: subject: 120201 Building Construction Management and Project Planning
subject: FOS: Civil engineering

description: Quantity Surveyors are one of the main professionals in the construction industry; they render service to construction clients which incorporate Architects, building proprietors, Investors, government organizations, Engineers, and contractual workers. They engage in evaluating, cost administration, obtainment administration, cost planning, contract organization, plausibility studies, resource monetary administration, all exercises identified by making money in the construction industry. Recently, Quantity surveying profession in Nigeria has one way or the other influenced by unethical practices display by its members. Due to the development, this paper aims to evaluate the measures in improving professionalism and ethical behaviours among Quantity Surveyors in Nigerian construction industry with a viable way to deal with a moral appraisal of Quantity Surveyors in the Nigerian construction industry in an approach to upgrading moral standard among them. It was uncovered in the findings that that transparency & accountability in contract administration, leaders serving as role models and constant supervision of ethics are the most notable measures to enhance ethical conducts among Quantity Surveyors. The study recommends that powerful disciplines like punishments, withdrawal of authentication or even cancellation of the permit on dull infringement might be presented by Nigerian Institute of Quantity Surveyors (NIQS) to minimized unethical practices among its members.
Arecibo Pulsar Survey Using ALFA. I. Survey Strategy and First Discoveries
Creators: name: Cordes, J. M.
name: Freire, P. C. C.
name: Lorimer, D. R.
name: Camilo, F.
name: Champion, D. J.
name: Nice, D. J.
name: Ramachandran, R.
name: Hessels, J. W. T.
name: Vlemmings, W.
name: van Leeuwen, J.
name: Ransom, S. M.
name: Bhat, N. D. R.
name: Arzoumanian, Z.
name: McLaughlin, M. A.
name: Kaspi, V. M.
name: Kasian, L.
name: Deneva, J. S.
name: Reid, B.
name: Chatterjee, S.
name: Han, J. L.
name: Backer, D. C.
name: Stairs, I. H.
name: Deshpande, A. A.
name: Faucher-Giguere, C. -A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report results from the initial stage of a long-term pulsar survey of the Galactic plane using the Arecibo L-band Feed Array (ALFA), a seven-beam receiver operating at 1.4 GHz with 0.3 GHz bandwidth. The search targets Galactic latitudes |b| < 5 deg in the longitude ranges 32 deg < l < 77 deg and 168 deg < l < 77 deg. Data discussed here were collected over a 100 MHz passband centered on 1.42 GHz using a spectrometer that recorded 256 channels every 64 microsec. In a preliminary, standard period-DM analysis, we have detected 29 previously known pulsars and discovered 11 new ones. One of these, with a period of 69 ms and a low characteristic age of 82 kyr, is a plausible candidate for association with the unidentified EGRET source 3EG J1928+1733. Another is a non-recycled pulsar in a relativistic binary with orbital period of 3.98 hr. We also search the data for isolated dispersed pulses, a technique that yielded discovery of an extremely sporadic radio emitter with a spin period of 1.2 s. Simulations we have carried out indicate that about 1000 new pulsars will be found in the ALFA survey. In addition to providing a large sample for use in population analyses and for probing the magnetoionic interstellar medium, the survey maximizes the chances of finding rapidly spinning millisecond pulsars and pulsars in compact binary systems. Our search algorithms will exploit the multiple data streams from ALFA to discriminate between radio frequency interference and celestial signals, including pulsars and possibly new classes of transient radio sources.
description: 10 pp, 9 figures, accepted by the Astrophysical Journal
Physodoceras Hyatt 1900
Creators: name: Cecca, Fabrizio
name: Savary, Bérengère
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Cephalopoda
Ammonitida
Aspidoceratidae
Physodoceras

description: Genus Physodoceras Hyatt, 1900
 TYPE SPECIES. — Ammonites circumspinosus Quenstedt, 1849.
description: Published as part of Cecca, Fabrizio & Savary, Bérengère, 2007, Palaeontological study of Middle Oxfordian- Early Kimmeridgian (Late Jurassic) ammonites from the Rosso Ammonitico of Monte Inici (north-western Sicily, Italy), pp. 507-548 in Geodiversitas 29 (4) on page 537, DOI: 10.5281/zenodo.4651042
The 2dF Galaxy Redshift Survey: higher order galaxy correlation functions
Creators: name: Croton, D. J.
name: Gaztanaga, E.
name: Baugh, C. M.
name: Norberg, P.
name: Colless, M.
name: Baldry, I. K.
name: Bland-Hawthorn, J.
name: Bridges, T.
name: Cannon, R.
name: Cole, S.
name: Collins, C.
name: Couch, W.
name: Dalton, G.
name: De Propris, R.
name: Driver, S. P.
name: Efstathiou, G.
name: Ellis, R. S.
name: Frenk, C. S.
name: Glazebrook, K.
name: Jackson, C.
name: Lahav, O.
name: Lewis, I.
name: Lumsden, S.
name: Maddox, S.
name: Madgwick, D.
name: Peacock, J. A.
name: Peterson, B. A.
name: Sutherland, W.
name: Taylor, K.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We measure moments of the galaxy count probability distribution function in the two-degree field galaxy redshift survey (2dFGRS). The survey is divided into volume limited subsamples in order to examine the dependence of the higher order clustering on galaxy luminosity. We demonstrate the hierarchical scaling of the averaged p-point galaxy correlation functions, xibar_p, up to p=6. The hierarchical amplitudes, S_p = xibar_p/xibar_2^{p-1}, are approximately independent of the cell radius used to smooth the galaxy distribution on small to medium scales. On larger scales we find the higher order moments can be strongly affected by the presence of rare, massive superstructures in the galaxy distribution. The skewness S_3 has a weak dependence on luminosity, approximated by a linear dependence on log luminosity. We discuss the implications of our results for simple models of linear and non-linear bias that relate the galaxy distribution to the underlying mass.
description: 14 pages, 10 figures. Slight revisions to match version published in MNRAS
Amplification of evanescent waves in a lossy left-handed material slab
Creators: name: Rao, X. S.
name: Ong, C. K.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We carry out finite-difference time-domain (FDTD) simulations, with a specially-designed boundary condition, on pure evanescent waves interacting with a lossy left-handed material (LHM) slab. Our results provide the first full-wave numerical evidence for the amplification of evanescent waves inside a LHM slab of finite absorption. The amplification is due to the interactions between the evanescent waves and the coupled surface polaritons at the two surfaces of the LHM slab and the physical process can be described by a simple model.
description: 4 pages, 2 figures
Leveraging data integration to improve broiler health management: a Polish case study
Creators: name: Delavenne, Camille
name: Śmiałek, Marcin
name: de Wit, Jacobus Joannes (Sjaak)
name: Faverjon, Céline
Publisher: name: Zenodo
Year: 2025
Subjects: subject: Poultry farming
subject: Animal health

description: Using real-world data in research is advocated as an efficient solution to improve animal health management by providing relevant and timely information for decision-making. This poster examines the process required to transform real-world data into information for decision-making, using data from Polish broiler farms as an example.
The didactic potential of virtual information educational environment as a tool of geography students training
Creators: name: Bondarenko, Olga
name: Pakhomova, Olena
name: Lewoniewski, Wlodzimierz
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: The article clarifies the concept of "virtual information educational environment" (VIEE) and examines the researchers' views on its meaning exposed in the scientific literature. The article determines the didactic potential of the virtual information educational environment for the geography students training based on the analysis of the authors' experience of blended learning by means of the Google Classroom. It also specifies the features (immersion, interactivity, and dynamism, sense of presence, continuity, and causality). The authors highlighted the advantages of virtual information educational environment implementation, such as: increase of the efficiency of the educational process by intensifying the process of cognition and interpersonal interactive communication; continuous access to multimedia content both in Google Classroom and beyond; saving student time due to the absence of necessity to work out the training material "manually"; availability of virtual pages of the virtual class; individualization of the educational process; formation of informational culture of the geography students ; and more productive learning of the educational material at the expense of IT educational facilities. Among the disadvantages the article mentions low level of computerization, insignificant quantity and low quality of software products, underestimation of the role of VIEE in the professional training of geography students, and the lack of economic stimuli, etc.
description: 11 pages, 1 figure, 1 table
AN EMPIRICAL INVESTIGATION INTO INCOME DISTRIBUTION, MARKET STRUCTURE AND UNIONISATION IN UK MANUFACTURING 1980-1984
Creators: name: Conyon, M. J.
name: Conyon, M. J.
Publisher: name: Unknown
Year: 1988
Subjects: Institutional and Behavioral Economics
Labor and Human Capital

description: This paper develops a Kaleckian income distribution model to assess the impact of various quantities on the share of wages in value added for the UK manufacturing sector. In particular it considers the empirical relationship between wage share, market structure, unionisation, and capacity effects. The sample is taken from three digit production industries over the period 1980-1984 and is analysed using sequential cross section and longitudinal techniques. The principle findings suggest that wage share and product market concentration display a consistent negative relationship, although the relationship is not necessarily linear as posited in earlier studies. Moreover, the findings indicate that union organisation ameliorates this monopolisation tendency and a positive relationship is established between unionisation and wage share. We also find that excess capacity negatively affects wage share in the sample period. The longitudinal results illustrate that industry specific effects are significant in explaining the income determination process. We conclude that omission of capacity or fixed effects in previous studies constitutes a specification bias caused by omitted variables.
Diffusion quantum Monte Carlo and GW study of the electronic properties of monolayer and bulk hexagonal boron nitride
Creators: name: Hunt, R. J.
name: Monserrat, B.
name: Zolyomi, V.
name: Drummond, N. D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We report diffusion quantum Monte Carlo (DMC) and many-body $GW$ calculations of the electronic band gaps of monolayer and bulk hexagonal boron nitride (hBN). We find the monolayer band gap to be indirect. $GW$ predicts much smaller quasiparticle gaps at both the single-shot $G_0W_0$ and the partially self-consistent $GW_0$ levels. In contrast, solving the Bethe-Salpeter equation on top of the $GW_0$ calculation yields an exciton binding energy for the direct exciton at the $K$ point in close agreement with the DMC value. Vibrational renormalization of the electronic band gap is found to be significant in both the monolayer and the bulk. Taking vibrational effects into account, DMC overestimates the band gap of bulk hBN, while $GW$ theory underestimates it.
An Investigation Into Sustainable Laundry Services For The New UBC Student Union Building
Creators: name: Currie, Duncan
name: Mason, Sam
name: Roy, Erik
name: Wodzak, Erica
Publisher: name: The University of British Columbia
Year: 2010

description: Disclaimer: “UBC SEEDS provides students with the opportunity to share the findings of their studies, as well as their opinions, conclusions and recommendations with the UBC community. The reader should bear in mind that this is a student project/report and is not an official document of UBC. Furthermore readers should bear in mind that these reports may not reflect the current status of activities at UBC. We urge you to contact the research persons mentioned in a report or the SEEDS Coordinator about the current status of the subject matter of a project/report.”
Comment on "Absence of Compressible Edge Channel Rings in Quantum Antidots"
Creators: name: Kataoka, M.
name: Ford, C. J. B.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In a recent article, Karakurt et al. [I. Karakurt et al., Phys. Rev. Lett. 89, 226803 (2002)] reported the absence of compressible regions around antidots in the quantum Hall regime. We wish to point out a significant flaw in their analysis, which invalidates their claim.
description: 1 page 1 figure, to be published in Phys. Rev. Lett
Estimating the infection horizon of COVID-19 in eight countries with a data-driven approach
Creators: name: Barmparis, G. D.
name: Tsironis, G. P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Biological Physics (physics.bio-ph)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: The COVID-19 pandemic has affected all countries of the world producing a substantial number of fatalities accompanied by a major disruption in their social, financial, and educational organization. The strict disciplinary measures implemented by China were very effective and thus were subsequently adopted by most world countries to various degrees. The infection duration and number of infected persons are of critical importance for the battle against the pandemic. We use the quantitative landscape of the disease spreading in China as a benchmark and utilize infection data from eight countries to estimate the complete evolution of the infection in each of these countries. The analysis predicts successfully both the expected number of daily infections per country and, perhaps more importantly, the duration of the epidemic in each country. Our quantitative approach is based on a Gaussian spreading hypothesis that is shown to arise as a result of imposed measures in a simple dynamical infection model. This may have consequences and shed light in the efficiency of policies once the phenomenon is over.
Value Engineering as a Tool for Sustainability in the Construction Industry of Oman
Creators: name: Amri, Tariq Al
name: Marey-Pérez, Manuel
Publisher: name: figshare
Year: 2020
Subjects: subject: 90502 Construction Engineering
subject: FOS: Civil engineering
subject: 90599 Civil Engineering not elsewhere classified
subject: 120201 Building Construction Management and Project Planning

description: Oman is an oil-dependent state as other GCC states. The construction industry in such regions, particularly Oman, is booming and is currently the largest employer for the Omani workforce in the private sector. Similar to other GCC countries, Oman intends to diversify its economy so that they limit their dependency on oil to promote sustainability, as there is a possibility for future oil depletion. However, the thriving construction industries continue to score poorly in terms of sustainability; thus, the necessity for sustainability measures arises. In this regard, this article proposes the incorporation of value engineering in the Omani construction sector to initiate sustainable measures for the industry. The article formulated some research questions elaborated using a systematic literature review to connect aspects of construction, sustainability, and quality.
Ego Network Structures in Multilayer Online Social Networks
Creators: name: Toprak, Mustafa
name: Boldrini, Chiara
name: Passarella, Andrea
name: Sastry, Nishanth
name: Di Stefano, Alessandro
Publisher: name: Zenodo
Year: 2021

description: Personal networks, i.e., the ensemble of social relationships that an individual entertains with other people, have received significant attention from researchers, and Dunbar's ego network model has proved to be a valuable tool for understanding their characteristics, both for offline and online interactions. Most of the studies in the literature are focused on single-layer ego networks, where relationships are treated as if they all belong to the same context. However, studies on multi-layer networks have recently highlighted the importance of considering the different dimensions of real-life networks. In this study, we bridge the gap between the literature on ego networks and that on multilayer networks by introducing the concept of multilayer ego networks. Our goal is to assess whether multilayer ego networks feature the same structural regularities observed in single-layers ego networks and to investigate the role that the different layers play in how people interact with each other. To this aim, we leverage a dataset extracted from Reddit, and we treat each subreddit as a different layer of the social network. How results show (i) that multilayer ego networks are self-similar, (ii) that egos distribute their cognitive efforts proportionally across their layers, and (iii) that egos accommodate multiple layers by adapting the outermost circles without significantly affecting the innermost ones.
Non-equilibrium wetting transition in a magnetic Eden model
Creators: name: Candia, Julián
name: Albano, Ezequiel V.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Magnetic Eden clusters with ferromagnetic interaction between nearest-neighbor spins are grown in a confined 2d-geometry with short range magnetic fields acting on the surfaces. The change of the growing interface curvature driven by the field and the temperature is identified as a non-equilibrium wetting transition and the corresponding phase diagram is evaluated.
description: 11 pages, 6 figures
On the Slowing Down of Spin Glass Correlation Length Growth:simulations meet experiments
Creators: name: Zhai, Q.
name: Martin-Mayor, V.
name: Schlagel, D. L.
name: Kenning, G. G.
name: Orbach, R. L.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: The growth of the spin-glass correlation length has been measured as a function of the waiting time $t_{\mathrm{w}}$ on a single crystal of CuMn (6 at.\%), reaching values $ξ\sim 150$ nm, larger than any other glassy correlation-length measured to date. We find an aging rate $\mathrm{d}\ln\,t_{\mathrm{w}}/\mathrm{d}\ln\,ξ$ larger than found in previous measurements, which evinces a dynamic slowing-down as $ξ$ grows. Our measured aging rate is compared with simulation results by the Janus collaboration. After critical effects are taken into account, we find excellent agreement with the Janus data.
description: Version accepted in PRB (see https://journals.aps.org/prb/abstract/10.1103/PhysRevB.100.094202)
title: Role of T Regulatory Cells in Pathogenesis of HIV-2 Infection
Creators: name: Zaidi, Irfan ul Hassan
Publisher: name: The Open University
Year: 2011

description: Infection with the HIV-2 virus can result in progression to acquired immunodeficiency syndrome (AIDS) similar to that seen in HIV-1 infections. However, the majority of HIV-2 infected individuals do not show evidence of disease progression and maintain a functional immune system. It was hypothesized that there was a better balance between effector and regulatory responses in HIV-2 infection that contributed to virus control and immune activation. Furthermore, the role of T regulatory cells was investigated in the development of Immune Reconstitution Syndrome in HIV-1 and HIV-2 patients commencing antiretroviral therapy.

In the present study I first determined the appropriate immunological signature of Tregs in HIV infections. Tregs were defined on the basis of CD4+CD127lo/-FOXP3+ and were shown to be strongly correlated with CD4+CD25+FOXP3+ or CD4+FOXP3+ cells. However measurement of Tregs using flow cytometry and real time PCR did not correlate. Hence measurement of Tregs from whole blood using flow cytometry was used in subsequent studies.

HIV-2 infected subjects had a significantly lower percentage and absolute number of Tregs compared to HIV-1 infected individuals when matched by CD4 count. In both infections, Treg percentage increased as CD4 T cell count declined while the absolute level was positively correlated with CD4 T cell count. In addition the percentage levels of Tregs positively correlated with the immune activation and viral load in HIV-2 infection only.

The next study measured the level of HIV specific immune responses and immune activation in asymptomatic HIV-1 and HIV-2 patients. HIV-2 infected subjects showed much higher percentage levels of HIV specific CD4 and CD8 T cell and lower percentage levels of activated T cells. Furthermore, it was shown that Tregs in HIV-2 patients were functional as their depletion resulted in increased HIV specific immune responses from CD4 and CD8 T cells.

To assess whether Tregs contributed to the development of Immune Reconstitution Inflammatory Syndrome, HIV-1 and HIV-2 infected patients that were scheduled to commence antiretroviral therapy were recruited and followed up for six months. Longitudinal measurement of Tregs showed no differences in the magnitude or trend of percentage or absolute numbers in patients that developed IRIS compared to those that did not.

Collectively these results suggest that the balance between effector and regulatory responses is maintained in HIV-2 infections which may in turn contribute to the improved prognosis of these patients compared to HIV-1 infections. The IRIS study showed that Tregs did not influence the development of IRIS though further functional characterization of these cells is required.
Life Cycle Costing (LCC).pdf
Creators: name: AKINRATA EBUNOLUWA
Publisher: name: figshare
Year: 2020
Subjects: subject: 120201 Building Construction Management and Project Planning
subject: FOS: Civil engineering
subject: 120203 Quantity Surveying

description: Life cycle cost in construction projects is a process of economic decision analysis, which helpstaking decisions on investments in new construction. These decisions on investments are analyzed forthe payback over the life of the investment. Life-cycle costing makes it possible for the whole lifeperformance of buildings and other structures to be optimized. This paper introduces the concept oflife-cycle costing in the Nigerian construction industry. It briefly explains monitoring costperformance over the economic life span, controlling the design development within the capital &running cost budgets and others as its benefits to the industry. Drivers and barriers to itsimplementation in Nigeria were not left out. Based on extensive literature review this paper shown thatthe life cycle costing techniques has not been implemented and greatly used in Nigeria. Unstableeconomic situation, government policy, separation of capital and running cost of most project andothers are the barrier facing its implementation. This paper also attempts to provide somerecommendations that should facilitate the implementation of LCC in the Nigeria.