cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Can inhomogeneties accelerate the cosmic volume expansion?
Creators: name: Kai, Tomohiro
name: Kozaki, Hiroshi
name: nakao, Ken-ichi
name: Nambu, Yasusada
name: Yoo, Chul-Moon
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: If expanding and contracting regions coexist in the universe, the speed of the cosmic volume expansion can be accelerated. We construct simple inhomogeneous dust-filled universe models in which the speed of the cosmic volume expansion is accelerated for finite periods. These models are constructed by removing spherical domains from the Einstein-de Sitter universe and filling each domain with a Lemaitre-Tolman-Bondi dust sphere possessing the same gravitational mass as the removed region. This represents an exact solution of the Einstein equations. We find that acceleration of the cosmic volume expansion is realized in some cases when the size of the contracting region is comparable to the horizon radius of the Einstein-de Sitter universe though this model is very different from the universe observed today. This result implies that non-linear general relativistic effects of inhomogeneities are very important to realize the acceleration of the cosmic volume expansion.
description: 12 pages,5 figures. version published in Progress of Theoretical Physics
West Midlands Archaeology 41
Creators: name: Mould, Catharine
Publisher: name: Archaeology Data Service
Year: 2002

description: West Midlands Archaeology, 41
description: 154 numbered pages. Preliminary items in unnumbered leading pages include Contents, promotion for CBA and Young Archaeologists' Club, and Notes for Contributors . Editorial. The Forum - short articles and notes for information or discussion: The Graham Webster Lecture 1998: Forward with the Past by Peter Addyman, Director, York Archaeological Trust, Wigmore Castle, Herefordshire by Nic Appleton-Fox, Marches Archaeology, Darwin House, Beacon Street, Lichfield by Bob Meeson, A report on interpreting crop marks by Jim Pickering, Flights of fancy over Dudley Castle by Adrian Durkin, Dudley Zoo and Castle, Burslem Market Place, Stoke-on-Trent: the Time Team dig by Bill Klemperer, Stoke-on-Trent City Council, Polesworth, a post-medieval country pottery by Nigel Melton, Recording vanishing industries - malleable iron and non-ferrous casters in Walsall by Ron Moss and Paul Collins, the Industrial Archaeology Group of the Black Country Society, The Wyre Forest coalfield by David Poyner, Cleobury Mortimer Historical Society/Shropshire Caving and Mining Club, Harborough Hall Estate by Tom Pagett, Hagley Historical and Field Society, Reconstructing burnt mounds by Mike Hodder, Birmingham City Council, The West Midlands Portable Antiquities pilot scheme: an up-date by Angie Bolton, Finds Liaison Officer, Herefordshire Archaeology: a new county archaeological service in the West Midlands by Keith Ray, Herefordshire Archaeology, Wolverhampton sites and monuments record: a new approach by Hilary White, Sites and Monuments Officer, A prehistoric Excalibur and other antiquities of divers dates: a catalogue of selected finds from Staffordshire recovered through metal detecting by Deborah A Ford, Jonathan Goodwin and Noel Boothroyd, the Potteries Museum and Art Gallery, Stoke-on-Trent, and Richard Abdy, Barrie Cook and Susan Youngs, the British Museum, Recent coin finds from Warwickshire and Worcestershire by Philip J Wise, Colchester Museums, English Heritage sites in the West Midlands with collections by Sara Lunt, English Heritage . Reports: West Midlands Archaeology in 1998 - gazetteer of archaeological work undertaken in the region during the year, arranged alphabetically by county and then by location. Directory of archaeological groups and institutions.
West Midlands Archaeology 40
Creators: name: Mould, Catharine
Publisher: name: Archaeology Data Service
Year: 2002

description: West Midlands Archaeology, 40
description: 125 numbered pages. Preliminary items in unnumbered leading pages include Contents, promotion for CBA and Young Archaeologists' Club, and notes for Contributors. Editorial . The Forum - short articles for information or discussion: The manor house of the Kinghts Templars at Chilvers Coton, North Warwickshire: new identification by Martin D Wilson, Souterrain Archaeological Services, The West Midlands Portable Antiquities pilot scheme by Angie Bolton, Portable Antiquities Officer, Glassmaking site in Bagot's Park, Staffordshire by Christopher Welch, Staffordshire County Archaeological Officer, A Roman tile comb from Hanley Hall, Shropshire by Roger White, Birmingham University Field Archaeology Unit, Recent coin finds from Warwickshire by Philip J Wise, Warwickshire Museum. Reports: West Midlands Archaeology in 1997 - gazetteer of archaeological work undertaken in the region during the year, arranged alphabetically by county and then by location. Directory of archaeological groups and institutions.
Supplementary document for Semi-device-independent certification of indefinite causal order in photonic quantum switch - 6351390.pdf
Creators: name: Cao, Huan
name: Bavaresco, Jessica
name: Wang, Ningning
name: Rozema, Lee
name: Zhang, Chao
name: Huang, YunFeng
name: Liu, Bi-Heng
name: Li, Chuanfeng
name: Guo, Guang-can
name: Walther, Philip
Publisher: name: Optica Publishing Group
Year: 2023
Subjects: Uncategorized

description: Supplemental Material
Dirac's hole theory versus quantum field theory
Creators: name: Coutinho, F. A. B.
name: Kiang, D.
name: Nogami, Y.
name: Tomio, Lauro
Publisher: name: arXiv
Year: 2000
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Dirac's hole theory and quantum field theory are usually considered equivalent to each other. For models of a certain type, however, the equivalence may not hold as we discuss in this Letter. This problem is closely related to the validity of the Pauli principle in intermediate states of perturbation theory.
description: No figures
Strain-induced large spin splitting and persistent spin helix at LaAlO$_3$/SrTiO$_3$ interface
Creators: name: Yamaguchi, Naoya
name: Ishii, Fumiyuki
Publisher: name: arXiv
Year: 2017
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We investigated the effect of the tensile strain on the spin splitting at the n-type interface in LaAlO$_3$/SrTiO$_3$ in terms of the spin-orbit coupling coefficient $α$ and spin texture in the momentum space using first-principles calculations. We found that the $α$ could be controlled by the tensile strain and be enhanced up to 5 times for the tensile strain of 7%, and the effect of the tensile strain leads to a persistent spin helix, which has a long spin lifetime. These results support that the strain effect on LaAlO$_3$/SrTiO$_3$ is important for various applications such as spinFET and spin-to-charge conversion.
description: 3 pages, 3 figures, corrected typographical errors and misleading expressions
Distribution and health risk assessment of heavy metals in soil surrounding a lead and zinc smelting plant in Zanjan, Iran
Creators: name: Jamal, Akram
name: Delavar, Mohammad Amir
name: Naderi, Arman
name: Naifseh Nourieh
name: Medi, Bijan
name: Mahvi, Amir Hossein
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biochemistry
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Cancer

description: One of the problematic issues in soil pollution studies is heavy metal particles which are produced by mines and smelting units and spread through wind action and/or runoff. Pollution and health risk assessment of cadmium, lead, zinc, copper, and nickel in soil around the lead and zinc smelting factory was carried out in Zanjan City, Iran. Contamination factor (Cf), pollution load index (PLI), geoaccumulation index (Igeo), hazard quotient (HQ), hazard index (HI), and carcinogenic risk were pollution and human health risk assessment metrics in this study. Based on the Iranian soil guideline value, soil samples in the studied areas were contaminated the least by copper and nickel and the most by cadmium. PLI results showed that soils near the production line were heavily or extremely heavily polluted. The results of Cf and Igeo showed that lead and zinc were the most important contaminants. Health risk assessment indicated that lead and cadmium in soil were the main contaminants, which pose both carcinogenic and non-carcinogenic risks to human health; carcinogenic risk levels were unacceptably high (above 1 × 10−4). It can be concluded that mining and smelting activities degrade soil quality in this region and the soil pollution might be extended to farming areas.
Additional file 1 of Transcriptome comparative analysis of ovarian follicles reveals the key genes and signaling pathways implicated in hen egg production
Creators: name: Sun, Xue
name: Chen, Xiaoxia
name: Zhao, Jinghua
name: Ma, Chang
name: Yan, Chunchi
name: Liswaniso, Simushi
name: Xu, Rifu
name: Qin, Ning
Publisher: name: figshare
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 1: Supplementary Table S1. Results of the cleaned data of reads filtered and the reads mapped. Supplementary Table S2. Construction frame of lentiviral vectors against NDUFAB1 and GABRA1 genes. Supplementary Table S3. Antibodies used for western blot analysis. Supplementary Figure S1. The oxidative phosphorylation pathway (gga: 00190) and its components. Supplementary Figure S2. The neuroactive ligand-receptor interaction pathway (gga: 04080) and its components. Supplementary Figure S3. The images show the original gels of western blot in the Fig. 6B and Fig. 6E. Supplementary Figure S4. The images show the original gels of western blot in the Fig. 8B and Fig. 8E.
Discovery of another peculiar radial distribution of Blue Stragglers in Globular Clusters: The case of 47 Tuc
Creators: name: Ferraro, Francesco R.
name: Beccari, Giacomo
name: Rood, Robert T.
name: Bellazzini, Michele
name: Sills, Alison
name: Sabbi, Elena
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have used high resolution WFPC2-HST and wide field ground-based observations to construct a catalog of blue straggler stars (BSS) in the globular cluster 47 Tuc spanning the entire radial extent of the cluster. The BSS distribution is highly peaked in the cluster center, rapidly decreases at intermediate radii, and finally rises again at larger radii. The observed distribution closely resembles that discovered in M3 by Ferraro et al (1993,1997). To date, complete BSS surveys covering the full radial extent (HST in the center and wide field CCD ground based observations of the exterior) have been performed for only these two clusters. Both show a bimodal radial distribution, despite their different dynamical properties. BSS surveys covering the full spatial extent of more globular clusters are clearly required to determine how common bimodality is and what its consequence is for theories of BSS formation and cluster dynamics.
description: 21 pages, 6 figures, accepted for pubblication in ApJ
Predicting multicellular function through multi-layer tissue networks
Creators: name: Zitnik, Marinka
name: Leskovec, Jure
Publisher: name: arXiv
Year: 2017
Subjects: subject: Machine Learning (cs.LG)
subject: Social and Information Networks (cs.SI)
subject: Molecular Networks (q-bio.MN)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: FOS: Biological sciences

description: Motivation: Understanding functions of proteins in specific human tissues is essential for insights into disease diagnostics and therapeutics, yet prediction of tissue-specific cellular function remains a critical challenge for biomedicine. Results: Here we present OhmNet, a hierarchy-aware unsupervised node feature learning approach for multi-layer networks. We build a multi-layer network, where each layer represents molecular interactions in a different human tissue. OhmNet then automatically learns a mapping of proteins, represented as nodes, to a neural embedding based low-dimensional space of features. OhmNet encourages sharing of similar features among proteins with similar network neighborhoods and among proteins activated in similar tissues. The algorithm generalizes prior work, which generally ignores relationships between tissues, by modeling tissue organization with a rich multiscale tissue hierarchy. We use OhmNet to study multicellular function in a multi-layer protein interaction network of 107 human tissues. In 48 tissues with known tissue-specific cellular functions, OhmNet provides more accurate predictions of cellular function than alternative approaches, and also generates more accurate hypotheses about tissue-specific protein actions. We show that taking into account the tissue hierarchy leads to improved predictive power. Remarkably, we also demonstrate that it is possible to leverage the tissue hierarchy in order to effectively transfer cellular functions to a functionally uncharacterized tissue. Overall, OhmNet moves from flat networks to multiscale models able to predict a range of phenotypes spanning cellular subsystems
description: In Proceedings of the 25th International Conference on Intelligent Systems for Molecular Biology (ISMB), 2017
Distribution and health risk assessment of heavy metals in soil surrounding a lead and zinc smelting plant in Zanjan, Iran
Creators: name: Jamal, Akram
name: Delavar, Mohammad Amir
name: Naderi, Arman
name: Naifseh Nourieh
name: Medi, Bijan
name: Mahvi, Amir Hossein
Publisher: name: Taylor & Francis
Year: 2018
Subjects: subject: Biochemistry
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Cancer

description: One of the problematic issues in soil pollution studies is heavy metal particles which are produced by mines and smelting units and spread through wind action and/or runoff. Pollution and health risk assessment of cadmium, lead, zinc, copper, and nickel in soil around the lead and zinc smelting factory was carried out in Zanjan City, Iran. Contamination factor (Cf), pollution load index (PLI), geoaccumulation index (Igeo), hazard quotient (HQ), hazard index (HI), and carcinogenic risk were pollution and human health risk assessment metrics in this study. Based on the Iranian soil guideline value, soil samples in the studied areas were contaminated the least by copper and nickel and the most by cadmium. PLI results showed that soils near the production line were heavily or extremely heavily polluted. The results of Cf and Igeo showed that lead and zinc were the most important contaminants. Health risk assessment indicated that lead and cadmium in soil were the main contaminants, which pose both carcinogenic and non-carcinogenic risks to human health; carcinogenic risk levels were unacceptably high (above 1 × 10−4). It can be concluded that mining and smelting activities degrade soil quality in this region and the soil pollution might be extended to farming areas.
A Multimodal Assistive System for Helping Visually Impaired in Social Interactions
Creators: name: Sarfraz, M. Saquib
name: Constantinescu, Angela
name: Zuzej, Melanie
name: Stiefelhagen, Rainer
Publisher: name: arXiv
Year: 2017
Subjects: subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: Access to non-verbal cues in social interactions is vital for people with visual impairment. It has been shown that non-verbal cues such as eye contact, number of people, their names and positions are helpful for individuals who are blind. While there is an increasing interest in developing systems to provide these cues less emphasis has been put in evaluating its impact on the visually impaired users. In this paper, we provide this analysis by conducting a user study with 12 visually impaired participants in a typical social interaction setting. We design a real time multi-modal system that provides such non-verbal cues via audio and haptic interfaces. The study shows that such systems are generally perceived as useful in social interaction and brings forward some concerns that are not being addressed in its usability aspects. The study provides important insight about developing such technology for this significant part of society.
Antibacterial activity of Indonesian red algae Gracilaria edulis against bacterial fish pathogens and characterization of active fractions
Creators: name: Noer Kasanah
name: Windi Amelia
name: Amirul Mukminin
name: Triyanto
name: Isnansetyo, Alim
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Biochemistry
subject: Space Science
subject: Microbiology
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Pharmacology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: Inorganic Chemistry
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: Plant Biology

description: In this study the crude ethyl acetate extracts and fractions from red algae Gracilaria edulis were studied against fish pathogens. G. edulis was extracted with ethyl acetate, fractionated in silica gel coloum chromatography and gradient hexane-ethyl acetate. The extract and fractions were subjected for bioassay guided isolation against fish pathogen Vibrio spp and Aeromonas hydrophila. Bioassays were accomplished by diffusion agar, bioauthography, and 96 well microplates format. Profiling chemical constituent was done by thin layer chromatography and GC-MS. Metabolites analysis using GC-MS yielded chemical constituents of active fractions as 9-hexadecenoic acid, hexadecanoic acid, 13-octadecenoic acid, 10-octadecenoic acid, eicosanoic acid, cholest-8-en-3-ol. The results provide in vitro scientific support to the possible application of Gracilaria edulis as antimicrobial agent that may contribute for treatment of bacterial infections in aquaculture.
Analogue spacetime based on 2-component Bose-Einstein condensates
Creators: name: Weinfurtner, Silke
name: Liberati, Stefano
name: Visser, Matt
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Analogue spacetimes are powerful models for probing the fundamental physical aspects of geometry - while one is most typically interested in ultimately reproducing the pseudo-Riemannian geometries of interest in general relativity and cosmology, analogue models can also provide useful physical probes of more general geometries such as pseudo-Finsler spacetimes. In this chapter we shall see how a 2-component Bose-Einstein condensate can be used to model a specific class of pseudo-Finsler geometries, and after suitable tuning of parameters, both bi-metric pseudo-Riemannian geometries and standard single metric pseudo-Riemannian geometries, while independently allowing the quasi-particle excitations to exhibit a "mass". Furthermore, when extrapolated to extremely high energy the quasi-particles eventually leave the phononic regime and begin to act like free bosons. Thus this analogue spacetime exhibits an analogue of the "Lorentz violation" that is now commonly believed to occur at or near the Planck scale defined by the interplay between quantum physics and gravitational physics. In the 2-component Bose-Einstein analogue spacetime we will show that the mass generating mechanism for the quasi-particles is related to the size of the Lorentz violations. This relates the "mass hierarchy" to the so-called "naturalness problem". In short the analogue spacetime based on 2-component Bose-Einstein condensates exhibits a very rich mathematical and physical structure that can be used to investigate many issues of interest to the high-energy physics, cosmology, and general relativity communities.
description: Chapter contributed to "Quantum Simulations via Analogues: From Phase Transitions to Black Holes", based on the COSLAB Dresden workshop, July 2005, to appear in the Springer "Lecture Notes in Physics" (LNP) series
Curvature profiles as initial conditions for primordial black hole formation
Creators: name: Polnarev, Alexander G.
name: Musco, Ilia
name: .
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: This work is part of an ongoing research programme to study possible Primordial Black Hole (PBH) formation during the radiation dominated era of the early universe. Working within spherical symmetry, we specify an initial configuration in terms of a curvature profile, which represents initial conditions for the large amplitude metric perturbations, away from the homogeneous Friedmann Robertson Walker model, which are required for PBH formation. Using an asymptotic quasi-homogeneous solution, we relate the curvature profile with the density and velocity fields, which at an early enough time, when the length scale of the configuration is much larger than the cosmological horizon, can be treated as small perturbations of the background values. We present general analytic solutions for the density and velocity profiles. These solutions enable us to consider in a self-consistent way the formation of PBHs in a wide variety of cosmological situations with the cosmological fluid being treated as an arbitrary mixture of different components with different equations of state. We show that the analytical solutions for the density and velocity profiles as functions of the initial time are pure growing modes. We then use two different parametrisation for the curvature profile and follow numerically the evolution of a range of initial configuration.
description: 31 pages, submitted to Class. Quant. Grav. In this version many changes: new results and discussions
Additional file 1 of The physiological and psychological effects of cognitive behavior therapy on patients with inflammatory bowel disease before COVID-19: a systematic review
Creators: name: Chen, Jie
name: Chen, Xuejie
name: Sun, Yuhao
name: Xie, Ying
name: Wang, Xiaoyan
name: Li, Ran
name: Hesketh, Therese
Publisher: name: figshare
Year: 2021
Subjects: Medicine
Biotechnology
Science Policy
Mental Health

description: Additional file 1. Detailed information of included and excluded studies, as well as the searching queries in databases.
Antibacterial activity of Indonesian red algae Gracilaria edulis against bacterial fish pathogens and characterization of active fractions
Creators: name: Noer Kasanah
name: Windi Amelia
name: Amirul Mukminin
name: Triyanto
name: Isnansetyo, Alim
Publisher: name: Taylor & Francis
Year: 2018
Subjects: subject: Biochemistry
subject: Space Science
subject: Microbiology
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Pharmacology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: Inorganic Chemistry
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: Plant Biology

description: In this study the crude ethyl acetate extracts and fractions from red algae Gracilaria edulis were studied against fish pathogens. G. edulis was extracted with ethyl acetate, fractionated in silica gel coloum chromatography and gradient hexane-ethyl acetate. The extract and fractions were subjected for bioassay guided isolation against fish pathogen Vibrio spp and Aeromonas hydrophila. Bioassays were accomplished by diffusion agar, bioauthography, and 96 well microplates format. Profiling chemical constituent was done by thin layer chromatography and GC-MS. Metabolites analysis using GC-MS yielded chemical constituents of active fractions as 9-hexadecenoic acid, hexadecanoic acid, 13-octadecenoic acid, 10-octadecenoic acid, eicosanoic acid, cholest-8-en-3-ol. The results provide in vitro scientific support to the possible application of Gracilaria edulis as antimicrobial agent that may contribute for treatment of bacterial infections in aquaculture.
Turbulent Fragmentation and Star Formation
Creators: name: Ballesteros-Paredes, Javier
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We review the main results from recent numerical simulations of turbulent fragmentation and star formation. Specifically, we discuss the observed scaling relationships, the ``quiescent'' (subsonic) nature of many star-forming cores, their energy balance, their synthesized polarized dust emission, the ages of stars associated with the molecular gas from which they have formed, the mass spectra of clumps, and the density and column density probability distribution function of the gas. We then give a critical discussion on recent attempts to explain and/or predict the star formation efficiency and the stellar initial mass function from the statistical nature of turbulent fields. Finally, it appears that turbulent fragmentation alone cannot account for the final stages of fragmentation: although the turbulent velocity field is able to produce filaments, the spatial distribution of cores in such filaments is better explained in terms of gravitational fragmentation.
description: 14 pages, 1 ps figure. Refered invited review, to appear in "Magnetic Fields and Star Formation: Theory versus Observations", eds. A.I. Gomez de Castro et al. (Kluwer), in press
How algorithmic popularity bias hinders or promotes quality
Creators: name: Nematzadeh, Azadeh
name: Ciampaglia, Giovanni Luca
name: Menczer, Filippo
name: Flammini, Alessandro
Publisher: name: arXiv
Year: 2017
Subjects: subject: Computers and Society (cs.CY)
subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences

description: Algorithms that favor popular items are used to help us select among many choices, from engaging articles on a social media news feed to songs and books that others have purchased, and from top-raked search engine results to highly-cited scientific papers. The goal of these algorithms is to identify high-quality items such as reliable news, beautiful movies, prestigious information sources, and important discoveries --- in short, high-quality content should rank at the top. Prior work has shown that choosing what is popular may amplify random fluctuations and ultimately lead to sub-optimal rankings. Nonetheless, it is often assumed that recommending what is popular will help high-quality content "bubble up" in practice. Here we identify the conditions in which popularity may be a viable proxy for quality content by studying a simple model of cultural market endowed with an intrinsic notion of quality. A parameter representing the cognitive cost of exploration controls the critical trade-off between quality and popularity. We find a regime of intermediate exploration cost where an optimal balance exists, such that choosing what is popular actually promotes high-quality items to the top. Outside of these limits, however, popularity bias is more likely to hinder quality. These findings clarify the effects of algorithmic popularity bias on quality outcomes, and may inform the design of more principled mechanisms for techno-social cultural markets.
Towards the graviton from spinfoams: higher order corrections in the 3d toy model
Creators: name: Livine, Etera R.
name: Speziale, Simone
name: Willis, Joshua L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider the recent calculation gr-qc/0508124 of the graviton propagator in the spinfoam formalism. Within the 3d toy model introduced in gr-qc/0512102, we test how the spinfoam formalism can be used to construct the perturbative expansion of graviton amplitudes. Although the 3d graviton is a pure gauge, one can choose to work in a gauge where it is not zero and thus reproduce the structure of the 4d perturbative calculations. We compute explicitly the next to leading and next to next to leading orders, corresponding to one-loop and two-loop corrections. We show that while the first arises entirely from the expansion of the Regge action around the flat background, the latter receives contributions from the microscopic, non Regge-like, quantum geometry. Surprisingly, this new contribution reduces the magnitude of the next to next to leading order. It thus appears that the spinfoam formalism is likely to substantially modify the conventional perturbative expansion at higher orders. This result supports the interest in this approach. We then address a number of open issues in the rest of the paper. First, we discuss the boundary state ansatz, which is a key ingredient in the whole construction. We propose a way to enhance the ansatz in order to make the edge lengths and dihedral angles conjugate variables in a mathematically well-defined way. Second, we show that the leading order is stable against different choices of the face weights of the spinfoam model; the next to leading order, on the other hand, is changed in a simple way, and we show that the topological face weight minimizes it. Finally, we extend the leading order result to the case of a regular, but not equilateral, tetrahedron.
description: 24 pages, many figures
West Midlands Archaeology 38
Creators: name: White, R
Publisher: name: Archaeology Data Service
Year: 2002

description: West Midlands Archaeology, 38
description: 134 numbered pages. Preliminary items in unnumbered leading pages include Contents and promotion for CBA and Young Archaeologists Club Editorial The Forum - short articles for information or discussion: Mills, mines, kilns and markets: industry in the West Midlands before the industrial revolution - summaries of papers given at a dayschool at the University of Birmingham, {Documents and medieval industry by John Hunt, WEA West Midlands, The role of mills in industrial production by Richard Holt, School of History, The University of Birmingham, Late medieval mining in Leicestershire with specific reference to the 'Lounge' mine shaft by Stuart Warburton, Leicestershire Museums, Snibston Discovery Park, Cannock Chase: an early industrial woodland by Christopher M Welch, Assistant Conservation and Archaeological Officer Staffordshire County Council, The pottery industry in the West Midlands by Stephanie Ratkai, Hereford and Worcester Archaeology Section, The leatherworking industry by M A Hodder, Planning Archaeologist, City of Birmingham, Buying and selling the products of industry, 1200-1500 by Christopher Dyer, School of History, The University of Birmingham}, A civil war redoubt at Coventry? by Keith Lilley, School of Geography, University of Birmingham, The North West Wetlands Survey, Shropshire and Staffordshire by Richard Short, Lancaster University Archaeology Unit, Further coin finds from Warwickshire by Philip J Wise, Warwickshire Museum Reports: West Midlands Archaeology in 1995 - gazetteer of archaeological work undertaken in the region during the year, arranged alphabetically by county and then by locationDirectory of archaeological groups and institutions
West Midlands Archaeology 39
Creators: name: Mould, Catharine
name: White, R
Publisher: name: Archaeology Data Service
Year: 2002

description: West Midlands Archaeology, 39
description: 124 numbered pages. Preliminary items in unnumbered leading pages include Contents and promotion for CBA and Young Archaeologists' Club. Editorial. The Forum - short articles for information or discussion: The north-western frontier of Viking Mercia: the evidence from stone monuments by P Sidebottom, Recent coin finds from Warwickshire by Philip J Wise, Warwickshire Museum, Time Team excavations at the Soho Manufactory and mint, Birmingham by George Demidowicz. West Midlands Archaeology in 1996 - gazetteer of archaeological work undertaken in the region during the year, arranged alphabetically by county and then by location Directory of archaeological groups and institutions
The oscillation and stability of differentially rotating spherical shells: The initial value problem
Creators: name: Watts, A. L.
name: Andersson, N.
name: Williams, R. L.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: An understanding of the oscillations of differentially rotating systems is key to many areas of astrophysics. It is of particular relevance to the emission of gravitational waves from oscillating neutron stars, which are expected to possess significant differential rotation immediately after birth or binary merger. In a previous paper we analysed the normal modes of a simple system exhibiting differential rotation. In this complementary paper we address the initial value problem for the same simple model using both analytical methods and numerical time evolutions. We derive a necessary and sufficient condition for dynamical shear instability. We discuss the dynamical behaviour of the continuous spectrum in response to an initial perturbation, and show that certain singular solutions within the continuous spectrum appear physically indistinguishable from the discrete modes outside the continuous spectrum.
description: 14 pages, 4 figures, minor additions, accepted for publication in MNRAS
Holographic complexity for Lifshitz system
Creators: name: Karar, Sourav
name: Gangopadhyay, Sunandan
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The holographic complexity of a 3+1-dimensional Lifshitz spacetime having a scaling symmetry is computed. The change in the holographic complexity between the excited state and the ground state is then obtained. This is then related to the changes in the energy and the entanglement chemical potential of the system. The calculation is carried out for both the values of the dynamical scaling exponent z in the Lifshitz spacetime. The relations has a very similar form to the corresponding relation involving the change in entanglement entropy known to be an analogous relation to the first law of thermodynamics.
Performance influences on metamodelling for aerodynamic surrogate-based optimization of an aerofoil
Creators: name: D. Viúdez-Moreiras
Publisher: name: Taylor & Francis
Year: 2018
Subjects: subject: Biophysics
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics

description: It is now common in aerospace design to build and adapt a surrogate model to use during optimization. This process starts with a training stage based on an initial database of high-fidelity results. However, it is difficult to have a priori knowledge of the database size necessary to achieve a particular level of accuracy. Thus, many optimization processes, such as aerodynamic optimization, start with a large number of initial cases, which usually implies long computational times on high-performance computers. This article identifies and analyses key variables which influence the surrogate performance, as applied to the aerodynamic optimization of an aerofoil, such as the database size, the number of geometric design parameters, variation from the baseline geometry, Reynolds number and angle of attack. Their relationship is explored by means of sensitivity analysis and a multivariable polynomial model, and general guidelines for the selection of the most suitable database size are presented.
Exactly solvable model for drift of suspended ferromagnetic particles induced by the Magnus force
Creators: name: Denisov, S. I.
name: Pedchenko, B. O.
name: Kvasnina, O. V.
name: Denisova, E. S.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The phenomenon of drift motion of single-domain ferromagnetic particles induced by the Magnus force in a viscous fluid is studied analytically. We use a minimal set of equations to describe the translational and rotational motions of these particles subjected to a harmonic force and a non-uniformly rotating magnetic field. Assuming that the azimuthal angle of the magnetic field is a periodic triangular function, we analytically solve the rotational equation of motion in the steady state and calculate the drift velocity of particles. We study in detail the dependence of this velocity on the model parameters, discuss the applicability of the drift phenomenon for separation of particles in suspensions, and verify numerically the analytical predictions.
description: 20 pages, 7 figures
title: ADCO, Boursier de Cîteaux : comptes (1489-1493) (11 H 1166), f. 00021
Creators: name: de la Côte-d'Or, Archives départementales
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: Petot, Frédéric
name: CBMA/CG21/F.PETOT/2019
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge
subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris
subject: comptes

description: Boursier de Cîteaux : comptes (1489-1493), Archives départementales de la Côte-d'Or, (11 H 1166). Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Boursier de Cîteaux : comptes (1489-1493), Archives départementales de la Côte-d'Or, (11 H 1166), f. 00021, in Projet CBMA - Corpus Burgundiae Medii Aevi \[Ressource en ligne\], https:// manuscrits.cbma-project.eu/
description: Provenance: abbaye de Cîteaux
description: Provenance: http://www.wikidata.org/entity/Q843261
description: Provenance: https://www.geonames.org/3024876
description: Provenance: http://www.idref.fr/030974844/id
description: Provenance: https://catalogue.bnf.fr/ark:/12148/cb12228351v
Calvera: A low-mass strangeon star torqued by debris disk?
Creators: name: Li, Yunyang
name: Wang, Weiyang
name: Ge, Mingyu
name: Liu, Xiongwei
name: Tong, Hao
name: Xu, Renxin
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Calvera is a $59\,\mathrm{ms}$ isolated pulsar, being unique due to its non-detection in radio, optical and gamma-rays but the purely thermal emission in soft X-rays. It is suggested that Calvera could be an ordinary middle-aged pulsar with significant magnetospheric activity at a large distance. Alternatively, it is proposed in this paper that Calvera is a low-mass strangeon star with inactive magnetosphere (dead). In this scenario, we jointly fit the spectra obtained by the {\it XMM-Newton} Observatory and the {\it Chandra} X-ray Observatory with the strangeon star atmosphere model. The spectral model is successful in explaining the radiation properties of Calvera and X-ray Dim Isolated Neutron Stars, both showing similar observation features. Within the dead pulsar picture, Calvera might be of high temperature at $0.67\,\mathrm{keV}$, possessing a small stellar radius $R\la4\,\mathrm{km}$ and a presumably small magnetic field $B\la10^{11}\,\mathrm{G}$ and is probably braked by the fall-back disk accretion. Future advanced facilities may provide unique opportunities to know the real nature of Calvera.
West Midlands Archaeology 33
Creators: name: Edwards, Rachel
name: Darlington, John
Publisher: name: Archaeology Data Service
Year: 2002

description: West Midlands Archaeology, 33
description: 107 numbered pages. Preliminary items in leading unnumbered pages include Contents EditorialThe Forum - short articles for information or discussion: Environmental archaeology in the West Midlands - A review and preview? by Clare de Rouffignac, Environmental Studies in Alcester by Stephen Cracknell, The role of environmental sampling in the interpretation of historic gardens by Christopher Currie, The Herefordshire Valleys Survey - results and future work by James Dinn, Interim report on a medieval tile kiln at Silver Street, Worcester by Hilary White and Duncan L Brown, The late medieval tiling industry in Worcestershire - some documentary evidence by Hilary White, Recent discoveries of medieval seal matrices in Warwickshire by Philip J Wise, The Warwickshire stone axe survey - recent work by Philip J Wise. West Midlands Archaeology in 1990 - gazetteer of archaeological work undertaken in the region during the year, arranged alphabetically by county and then by location. Directory of archaeological groups and institutions.
Particle collisions and optical effects in the mining Kerr--Newman spacetimes
Creators: name: Stuchlík, Zdeněk
name: Blaschke, Martin
name: Schee, Jan
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study ultra-high-energy particle collisions and optical effects in the extraordinary class of mining braneworld Kerr-Newman (KN) naked singularity spacetimes, predicting extremely high efficiency of Keplerian accretion, and compare the results to those related to the other classes of the KN naked singularity and black hole spacetimes. We demonstrate that in the mining KN spacetimes the ultra-high centre-of-mass energy occurs for collisions of particles following the extremely-low-energy stable circular geodesics of the \uvozovky{mining regime}, colliding with large family of incoming particles, e.g., those infalling from the marginally stable counter-rotating circular geodesics. This is qualitatively different situation in comparison to the standard KN naked singularity or black hole spacetimes where the collisional ultra-high centre-of-mass energy can be obtained only in the near-extreme spacetimes. We also show that observers following the stable circular geodesics of the mining regime can register extremely blue-shifted radiation incoming from the Universe, and see strongly deformed sky due to highly relativistic motion along such stable orbits. The strongly blue-shifted radiation could be thus a significant source of energy for such orbiting observers.
New 'phase' of quantum gravity
Creators: name: Wang, Charles H. -T.
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Popular Physics (physics.pop-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The emergence of loop quantum gravity over the past two decades has stimulated a great resurgence of interest in unifying general relativity and quantum mechanics. Amongst a number of appealing features of this approach are the intuitive picture of quantum geometry using spin networks and powerful mathematical tools from gauge field theory. However, the present form of loop quantum gravity suffers from a quantum ambiguity, due to the presence of a free (Barbero-Immirzi) parameter. Following recent progress on the conformal decomposition of gravitational fields, we present a new phase space for general relativity. In addition to spin-gauge symmetry, the new phase space also incorporates conformal symmetry making the description parameter free. The Barbero-Immirzi ambiguity is shown to occur only if the conformal symmetry is gauge-fixed prior to quantization. By withholding its full symmetries, the new phase space offers a promising platform for the future development of loop quantum gravity. This paper aims to provide an exposition, at a reduced technical level, of the above theoretical advances and their background developments. Further details are referred to cited references.
description: 17 pages, 6 figures, To appear in the 2006 Christmas Issue of Phil. Trans. Roy. Soc. A
A unified unit root test regardless of intercept
Creators: name: Yang, Bingduo
name: Liu, Xiaohui
name: Long, Wei
name: Peng, Liang
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Plant Biology
subject: FOS: Biological sciences

description: Using the augmented Dickey-Fuller test to verify the existence of a unit root in an autoregressive process often requires the correctly specified intercept, since the test statistics can be distinctive under different model specifications and lead to contradictory results at times. In this article, we develop a unified inference that not only unifies the specifications of the intercept but also accommodates different degrees of persistence of the underlying process and heteroscedastic errors. A simulation study shows that the resulting unified unit root test exhibits excellent size control and reasonably good power. In an empirical application, we implement the proposed test to re-examine the presence of unit roots within eleven widely used variables in stock return predictability.
The Extended Bogomolny Equations and Generalized Nahm Pole Boundary Condition
Creators: name: He, Siqi
name: Mazzeo, Rafe
Publisher: name: arXiv
Year: 2017
Subjects: subject: Differential Geometry (math.DG)
subject: High Energy Physics - Theory (hep-th)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: In this paper we develop a Kobayashi-Hitchin type correspondence between solutions of the extended Bogomolny equations on $Σ\times \RP$ with Nahm pole singularity at $Σ\times \{0\}$ and the Hitchin component of the stable $SL(2,\mathbb{R})$ Higgs bundle; this verifies a conjecture of Gaiotto and Witten. We also develop a partial Kobayashi-Hitchin correspondence for solutions with a knot singularity in this program, corresponding to the non-Hitchin components in the moduli space of stable $SL(2,\mathbb{R})$ Higgs bundles. We also prove existence and uniqueness of solutions with knot singularities on $\mathbb{C}\ti\RP$.
description: 30 pages, 2 figures
West Midlands Archaeology 34
Creators: name: Darlington, John
Publisher: name: Archaeology Data Service
Year: 2002

description: West Midlands Archaeology, 34
description: 105 numbered pages. Preliminary items in unnumbered leading pages include Contents Editorial The Forum - short articles for information or discussion: Alcester's Roman defences: excavations at the Gateway supermarket site, 1986 by Stephen Cracknell, Warwickshire Museum, A Roman villa at Acton Trussell, Staffordshire by Tony Habberley, Penk Valley Archaeological Group, Mancetter, Roman legionary fortress by Colin Baddeley, Atherstone Archaeological Sociey, Castle Bromwich Hall, excavations directed by P. Twigg, 1985-8: a summary of the results by Martin Locock and Christopher Currie, Gardens Archaeology Project, Further discoveries of medieval seal matrices in Warwickshire by Philip Wise, Warwickshire Museum West Midlands Archaeology in 1990 - gazetteer of archaeological work undertaken in the region during the year, arranged alphabetically by county and then by locationDirectory of archaeological groups and institutions.