cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Constraining the reionization history using deep learning from 21cm tomography with the Square Kilometre Array
Creators: name: Mangena, Tumelo
name: Hassan, Sultan
name: Santos, Mario G.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Upcoming 21cm surveys with the SKA1-LOW telescope will enable imaging of the neutral hydrogen distribution on cosmological scales in the early Universe. These surveys are expected to generate huge imaging datasets that will encode more information than the power spectrum. This provides an alternative unique way to constrain the reionization history, which might break the degeneracy in the power spectral analysis. Using Convolutional Neural Networks (CNN), we create a fast estimator of the neutral fraction from the 21cm maps that are produced by our large semi-numerical simulation. Our estimator is able to efficiently recover the neutral fraction ($x_{\rm HI}$) at several redshifts with a high accuracy of 99\% as quantified by the coefficient of determination $R^{2}$. Adding the instrumental effects from the SKA design slightly increases the loss function, but nevertheless we are still able to recover the neutral fraction with a similar high accuracy of 98\%, which is only 1 per cent less. While a weak dependence on redshift is observed, the accuracy increases rapidly with decreasing neutral fraction. This is due to the fact that the instrumental noise increases towards high redshift where the Universe is highly neutral. Our results show the promise of directly using 21cm-tomography to constrain the reionization history in a model independent way, complementing similar efforts, such as those of the optical depth measurements from the Cosmic Microwave Background (CMB) observations by {\it Planck}.
description: Accepted for publication in MNRAS
An Investigation into Biodegradable Utensils for the SUB Renewal Project
Creators: name: Randt, David
name: Zhuang, Ji
name: Khastoo, Amir
name: Zheng, Patrick
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.”
Why You Cannot (Yet) Write an "Interval Arithmetic" Library in Common Lisp
Creators: name: Antoniotti, Marco
Publisher: name: arXiv
Year: 2020
Subjects: subject: Programming Languages (cs.PL)
subject: FOS: Computer and information sciences
subject: D.3.3

description: "Interval Arithmetic" (IA) appears to be a useful numerical tool to have at hand in several applications. Alas, the current IA descriptions and proposed standards are always formulated in terms of the IEEE-754 standard, and the status of IEEE-754 compliance of most Common Lisp implementations is not up to par. A solution would be for Common Lisp implementations to adhere to the Language Independent Arithmetic} (LIA) IEC standard, which includes IEEE/754. While the LIA standard provides a set of proposed bindings for Common Lisp, the format and depth of the specification documents is not readily usable by a Common Lisp programmer, should an implementation decide to comply with the provisions. Moreover, much latitude is left to each implementation to provide the LIA "environmental" setup. It would be most beneficial if more precision were agreed upon by the Common Lisp community about how to provide LIA compliance in the implementations. In that case, a new set of documentation or manuals in the style of the HyperSpec could be provided, for the benefit of the Common Lisp programmer.
description: 11 pages, paper submitted to the European Lisp Symposium 2020, Zurich, CH
Subdiscosphinctes Malinowska 1972
Creators: name: Cecca, Fabrizio
name: Savary, Bérengère
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Cephalopoda
Ammonoidea
Perisphinctidae
Subdiscosphinctes

description: Genus Subdiscosphinctes Malinowska, 1972
 TYPE SPECIES. — Perisphinctes kreutzi Siemiradzki, 1891.
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 520, DOI: 10.5281/zenodo.4651042
X-Ray and Radio Emission from UV-Selected Star Forming Galaxies at Redshifts 1.5
Creators: name: Reddy, Naveen A.
name: Steidel, Charles C.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have examined the stacked radio and X-ray emission from UV-selected galaxies spectroscopically confirmed to lie between redshifts 1.5 < z < 3.0 in the GOODS-North field to determine their average extinction and star formation rates (SFRs). The X-ray and radio data are obtained from the Chandra 2 Msec survey and the Very Large Array, respectively. There is a good agreement between the X-ray, radio, and de-reddened UV estimates of the average SFR for our sample of z~2 galaxies of ~50 solar masses per year, indicating that the locally-calibrated SFR relations appear to be statistically valid from redshifts 1.5 < z < 3.0. We find that UV-estimated SFRs (uncorrected for extinction) underestimate the bolometric SFRs as determined from the 2-10 keV X-ray luminosity by a factor of ~4.5 to 5.0 for galaxies over a large range in redshift from 1.0 < z < 3.5.
description: 5 pages, 1 figure, Accepted by ApJ Letters
The designs and deformations of rigidly and flat-foldable quadrilateral mesh origami
Creators: name: Feng, Fan
name: Dang, Xiangxin
name: James, Richard D.
name: Plucinsky, Paul
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Rigidly and flat-foldable quadrilateral mesh origami is the class of quadrilateral mesh crease patterns with one fundamental property: the patterns can be folded from flat to fully-folded flat by a continuous one-parameter family of piecewise affine deformations that do not stretch or bend the mesh-panels. In this work, we explicitly characterize the designs and deformations of all possible rigidly and flat-foldable quadrilateral mesh origami. Our key idea is a rigidity theorem (Theorem 3.1) that characterizes compatible crease patterns surrounding a single panel and enables us to march from panel to panel to compute the pattern and its corresponding deformations explicitly. The marching procedure is computationally efficient. So we use it to formulate the inverse problem: to design a crease pattern to achieve a targeted shape along the path of its rigidly and flat-foldable motion. The initial results on the inverse problem are promising and suggest a broadly useful engineering design strategy for shape-morphing with origami.
AURORAL D1.9 - Open Research Data Pilot
Creators: name: García-Castro, Raúl
Publisher: name: Zenodo
Year: 2021
Subjects: Open data
ORDP
Open Research Data Pilot
Publications
Data

description: AURORAL is part of the EC’s Open Research Data Pilot programme; therefore, the goal of this deliverable is to specify the terms for the project participation in that programme. As such, this deliverable presents the AURORAL Open Research Data Strategy and explains how AURORAL aims to provide open access to the publications and data generated by the project. The AURORAL open research data strategy is in line with the H2020 guidelines. Furthermore, the AURORAL Zenodo community will be the entry point for all the AURORAL open publications and data.
description: This report is part of the AURORAL project that has received funding by the European Union's Horizon 2020 Programme under Grant Agreement number 101016854. The results of these deliverables reflect only the author's view and the Commission is not responsible for any use that may be made of the information it contains. These deliverables may be subject to final acceptance by the European Commission.
description: {"references": ["European Commission. Guidelines to the Rules on Open Access to Scientific Publications and Open Access to Research Data in Horizon 2020. Version 3.2. 21 March 2017", "AURORAL community in Zenodo. https://zenodo.org/communities/auroral/, retrieved 2021-03-26", "Wilkinson, M., Dumontier, M., Aalbersberg, I. et al. The FAIR Guiding Principles for scientific data management and stewardship. Sci Data 3, 160018 (2016). https://doi.org/10.1038/sdata.2016.18"]}
Relation Between the Widom line and the Strong-Fragile Dynamic Crossover in Systems with a Liquid-Liquid Phase Transition
Creators: name: Xu, L.
name: Kumar, P.
name: Buldyrev, S. V.
name: Chen, S. -H.
name: Poole, P. H.
name: Sciortino, F.
name: Stanley, H. E.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We investigate, for two water models displaying a liquid-liquid critical point, the relation between changes in dynamic and thermodynamic anomalies arising from the presence of the liquid-liquid critical point. We find a correlation between the dynamic fragility transition and the locus of specific heat maxima $C_P^{\rm max}$ (``Widom line'') emanating from the critical point. Our findings are consistent with a possible relation between the previously hypothesized liquid-liquid phase transition and the transition in the dynamics recently observed in neutron scattering experiments on confined water. More generally, we argue that this connection between $C_P^{\rm max}$ and dynamic crossover is not limited to the case of water, a hydrogen bond network forming liquid, but is a more general feature of crossing the Widom line. Specifically, we also study the Jagla potential, a spherically-symmetric two-scale potential known to possess a liquid-liquid critical point, in which the competition between two liquid structures is generated by repulsive and attractive ramp interactions.
description: 6 pages and 5 figures
First observations and magnitude measurement of Starlink's Darksat
Creators: name: Tregloan-Reed, J.
name: Otarola, A.
name: Ortiz, E.
name: Molina, V.
name: Anais, J.
name: González, R.
name: Colque, J. P.
name: Unda-Sanzana, E.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Measure the Sloan g' magnitudes of the Starlink's STARLINK-1130 (Darksat) and 1113 LEO communication satellites and determine the effectiveness of the Darksat darkening treatment at 475.4\,nm. Two observations of the Starlink's Darksat LEO communication satellite were conducted on 2020/02/08 and 2020/03/06 using a Sloan r' and g' filter respectively. While a second satellite, STARLINK-1113 was observed on 2020/03/06 using a Sloan g' filter. The initial observation on 2020/02/08 was a test observation when Darksat was still manoeuvring to its nominal orbit and orientation. Based on the successful test observation, the first main observation was conducted on 2020/03/06 along with an observation of the second Starlink satellite. The calibration, image processing and analysis of the Darksat Sloan g' image gives an estimated Sloan g' magnitude of $7.46\pm0.04$ at a range of 976.50\,km. For STARLINK-1113 an estimated Sloan g' magnitude of $6.59\pm0.05$ at a range of 941.62\,km was found. When scaled to a range of 550\,km and corrected for the solar and observer phase angles, a reduction by a factor of two is seen in the reflected solar flux between Darksat and STARLINK-1113. The data and results presented in this work, show that the special darkening coating used by Starlink for Darksat has darkened the Sloan g' magnitude by $0.77\pm0.05$\,mag, when the range is equal to a nominal orbital height (550\,km). This result will serve members of the astronomical community modelling the satellite mega-constellations, to ascertain their true impact on both the amateur and professional astronomical communities. Concurrent and further observations are planned to cover the full optical and NIR spectrum, from an ensemble of instruments, telescopes and observatories.
description: Accepted for publication in A&A Letters. 5 pages, 2 figures and 4 tables
Analysis of resource use efficiency in garlic production in Kano State, Nigeria
Creators: name: Ahmed, B.
name: Jobdi, M.S.
name: Olukosi, J.O.
name: Ahmed, B.
name: Jobdi, M.S.
name: Olukosi, J.O.
Publisher: name: Unknown
Year: 2011
Subjects: subject: Crop Production/Industries
subject: Production Economics
subject: Resource use efficiency
subject: Garlic production
subject: Kano State

description: A study of the efficiency of resource usage in farm production is necessary to guide the producer on how best to allocate the scarce resources on his farm. Production data were collected from 120 farmers randomly selected from two local government areas of Kano state. The data were analyzed using OLS regression method to estimate the production function and the ratio of marginal value product to marginal factor cost as the measure of resource use efficiency. The lead functional form was the double log function which produced an adjusted R2 of 0.86. Seed, organic manure and labour inputs have positive effects and were statistically significant at 1 percent level of probability. However, all the inputs were inefficiently utilized with organic manure and labour being under-utilized while seed was over-utilized. Based on these findings, it was suggested that in order to enhance the efficiency of production less seed and more of organic manure and labour should be used.
Bayesian Statistical Variable Selection: A Review
Creators: name: Scipione, Catherine M.
name: Scipione, Catherine M.
Publisher: name: Unknown
Year: 1994
Subjects: subject: Research Methods/ Statistical Methods
subject: Model selection
subject: multiple regression
subject: Occam's razor
subject: model validation
subject: iterative learning
subject: Markov chain Monte Carlo methods

description: From a Bayesian viewpoint, the answer (in theory, at least) to the general model selection problem is known. However, the formalization of the selection problem does not realistically match the iterative process that occurs when selecting a model in practice. In addition, computational restrictions limit the applicability of the solution in general. In the multiple linear regression variable selection setting, however, the Bayesian approach offers some practical procedures that can be used to at least reduce the possible number of models under consideration. 'Semi-automatic' methods for Bayesian variable selection have recently been developed by Mitchell and Beauchamp (1988) and George and McCulloch (1993) using relatively uniformative prior distributions for the unknown regression coefficients and variance parameter. In particular, their choices enable the computation of the general solution to be feasible.
Determinants of women's participation in entrepreneurship development in Yewa North Local Government Area, Ogun-State, Nigeria
Creators: name: Akerele, E.O.
name: Aihonsu, J.O.Y.
name: Akerele, E.O.
name: Aihonsu, J.O.Y.
Publisher: name: Unknown
Year: 2011
Subjects: subject: Consumer/Household Economics
subject: Institutional and Behavioral Economics
subject: Entrepreneurship
subject: Women participation
subject: Determinants
subject: Yewa North

description: The primary objective of this study is to assess the determinants of women participation in entrepreneurship development in Yewa North Local Government Area, Ogun-State. The data used were collected both from primary and secondary sources. Multi-stage sampling technique was used to collect primary data using structured questionnaires and interview, given a total of 100 respondents. The descriptive and inferential statistics were used to analyze the data collected. The findings showed that women’s family determine how successful they are going to be in running the business enterprise most especially the aspect of getting support and combining their house work with their business activities. Also, it was revealed that some socio-economic factors act as impediments to growth of a woman entrepreneur because they become successful if they worry less about the attitudes of society.
Euaspidoceras Spath 1931
Creators: name: Cecca, Fabrizio
name: Savary, Bérengère
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Cephalopoda
Ammonitida
Aspidoceratidae
Euaspidoceras

description: Genus Euaspidoceras Spath, 1931
 TYPE SPECIES. — Ammonites perarmatus J. Sowerby, 1822.
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
What Would a Good, Fair Neighbourly Relationship with the Airport Look Like?
Creators: name: Hauptvogel, Dominik
name: Quehl, Julia
name: Bartels, Susanne
Publisher: name: Zenodo
Year: 2021

description: A large part of annoyance due to aircraft noise is influenced by non-acoustical factors like attitude towards the noise source, trust and perceived fairness (Guski, 1999). Most of these factors can best be impacted with honest, transparent and communication and information. Up to now, communication and information on aircraft noise issues are mostly too technical and complex to be understood by lay residents. Understandable and comprehensible information has to be designed in accordance with the needs and expectations of affected airport residents.
AN 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.
Testing for Independence of Irrelevant Alternatives: Some Empirical Results
Creators: name: Fry, Tim R. L.
name: Harris, Mark N.
name: Fry, Tim R. L.
name: Harris, Mark N.
Publisher: name: Unknown
Year: 1994
Subjects: subject: Research and Development/Tech Change/Emerging Technologies
subject: Research Methods/ Statistical Methods
subject: Multinomial Logit
subject: Independence of Irrelevant Alternatives
subject: Hypothesis Testing

description: We estimate a multinomial Logit (MNL) model of U.K. Magistrates' Courts sentencing using a data set collected by the National Association for the Care and Resettlement of Offenders (NACRO) and test the independence of irrelevant alternatives (IIA) property using six tests. Conducting the tests with the appropriate asymptotic critical values we find that the acceptance or rejection of IIA depends both upon which test and which variant of a given test is used. The same tests are then performed using empirical critical values obtained by simulation and the resultant inferences compared. Our results show that empirical workers should exercise care when testing for IIA.
D4.1 Advanced software stack for Earth system data
Creators: name: Bethke, Eugen
name: Lawrence, Bryan
name: Kunkel, Julian
name: Pedro, Luciana
name: Hübbe, Nathanael
name: Massey, Neil
name: Cole, Jeff
name: Lister, Grenville
name: Wilson, Simon
name: Elia, Donatello
name: Palazzo, Cosimo
Publisher: name: Zenodo
Year: 2021

description: An exascale simulation requires extreme-scale I/O. Existing workflows will not scale to this extent, particularly as an exascale simulation is likely to involve a smaller number of individuals carrying out large simulations and a larger number of individuals carrying out analysis of simulation products. Such analysis is bound to include data comparison from simulations carried out in multiple locations and stored on a range of media. ESiWACE addresses the entire workflow with software solutions addressing a range of targets, from simulation, through analysis, to information management across institutions. Most of the effort has been devoted to the simulation problem with work on both improving I/O from simulations (using the Earth System Data Middleware, ESDM) and on ensemble data analysis (using the X I/O server, XIOS). The ESDM provides relaxed I/O semantics and manages the heterogeneous storage available in a data centre by mapping datasets dynamically to (possibly multiple) storage locations, addressing both simulation and analysis use cases. This document provides a high-level descriptions of that software stack, including full documentation and information about how to enable ESDM support for existing NetCDF applications and utilise the ESDM API for software development. As part of the development that resulted in the ESDM architecture described and documented here, the ESDM code was hardened, and the I/O path has been investigated for many use cases and optimised. The performance measurements indicate that performance can be close to optimal for large-scale data access. Several additional features had been explored and prototyped that bear a high potential for large-scale performance improvements and co-design with vendors. These include new storage backends for S3, Motr, KOVE, PMEM-IO, and IME, which have been developed to bypass the POSIX API and accelerate performance. Ensemble data analysis can be carried out using existing tools (CYLC and XIOS), albeit with customisations that are model dependent. The necessary software can be built using NetCDF directly, or with the ESDM.
Promoting Sustainable Mobility: To What Extent Is “Health” Considered by Mobility App Studies? A Review and a Conceptual Framework
Creators: name: Marquart, Heike
name: Schuppan, Julia
Publisher: name: Humboldt-Universität zu Berlin
Year: 2021
Subjects: subject: mobility app
subject: smartphone app
subject: mobility behavior change
subject: health
subject: protection motivation theory
subject: literature review
subject: 333.7 Landflächen, Naturräume für Freizeit und Erholung, Naturreservate, Energie

description: Promoting cycling and walking in cities improves individual health and wellbeing and, together with public transport, promotes societal sustainability patterns. Recently, smartphone apps informing and motivating sustainable mobility usage have increased. Current research has applied and investigated these apps; however, none have specifically considered mobility-related health components within mobility apps. The aim of this study is to examine the (potential) role of health-related information provided in mobility apps to influence mobility behavior. Following a systematic literature review of empirical studies applying mobility apps, this paper (1) investigates the studies and mobility apps regarding communicated information, strategies, and effects on mobility behavior and (2) explores how, and to what extent, health and its components are addressed. The reviewed studies focus on environmental information, especially CO2-emissions. Health is represented by physical activity or calories burned. The self-exposure to air pollution, noise, heat, traffic injuries or green spaces is rarely addressed. We propose a conceptual framework based on protection motivation theory to include health in mobility apps for sustainable mobility behavior change. Addressing people’s self-protective motivation could empower mobility app users. It might be a possible trigger for behavior change, leading towards healthy and sustainable mobility and thus, have individual and societal benefits.
An Investigation into a Sustainable Laundry Service For the New SUB
Creators: name: Hilbrecht, Brittany
name: Hopkinson, Toby
name: Patel, Nitil
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.”
AN OPEN LETTER TO THE SCIENTIFIC COMMUNITY ON THE POSSIBLE ROLE OF DYSREGULATED BRADYKININ SIGNALING IN COVID-19 RESPITORY 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.
3D magneto-hydrodynamical simulations of stellar convective noise for improved exoplanet detection. I. Case of regularly sampled radial velocity observations
Creators: name: Sulis, S.
name: Mary, D.
name: Bigot, L.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Convective motions at the stellar surface generate a stochastic colored noise source in the radial velocity (RV) data. This noise impedes the detection of small exoplanets. Moreover, the unknown statistics (amplitude, distribution) related to this noise make it difficult to estimate the false alarm probability (FAP) for exoplanet detection tests. In this paper, we investigate the possibility of using 3D magneto-hydrodynamical simulations (MHD) of stellar convection to design detection methods that can provide both a reliable estimate of the FAP and a high detection power. We tested the realism of 3D simulations in producing solar RV by comparing them with the observed disk integrated velocities taken by the GOLF instrument on board the SOHO spacecraft. We presented a new detection method based on periodograms standardized by these simulated time series, applying several detection tests to these standarized periodograms. The power spectral density of the 3D synthetic convective noise is consistent with solar RV observations for short periods. For regularly sampled observations, the analytic expressions of FAP derived for several statistical tests applied to the periodogram standardized by 3D simulation noise are accurate. The adaptive tests considered in this work (Higher-Criticism, Berk-Jones), which are new in the exoplanet field, may offer better detection performance than classical tests (based on the highest periodogram value) in the case of multi-planetary systems and planets with eccentric orbits. 3D MHD simulations are now mature enough to produce reliable synthetic time series of the convective noise affecting RV data. These series can be used to access to the statistics of this noise and derive accurate FAP of tests that are a critical element in the detection of exoplanets down to the cm/s level.
description: Accepted for publication in Astronomy and Astrophysics
Strong spin-orbit splitting on Bi surfaces
Creators: name: Koroteev, Yu. M.
name: Bihlmayer, G.
name: Gayone, J. E.
name: Chulkov, E. V.
name: Bluegel, S.
name: Echenique, P. M.
name: Hofmann, Ph.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Using first-principles calculations and angle-resolved photoemission, we show that the spin-orbit interaction leads to a strong splitting of the surface state bands on low-index surfaces of Bi. The dispersion of the states and the corresponding Fermi surfaces are profoundly modified in the whole surface Brillouin zone. We discuss the implications of these findings with respect to a proposed surface charge density wave on Bi(111) as well as to the surface screening, surface spin-density waves, electron (hole) dynamics in surface states, and to possible applications to the spintronics.
description: 4 pages 2 figures
Comparative technical efficiency of pond fish production under two management systems in Abeokuta Metropolis, Ogun State, Nigeria
Creators: name: Ayinde, I.A.
name: Ashaolu, O.F.
name: Adewuyi, S.A.
name: Omosowon, O.B.
name: Ayinde, I.A.
name: Ashaolu, O.F.
name: Adewuyi, S.A.
name: Omosowon, O.B.
Publisher: name: Unknown
Year: 2011
Subjects: subject: Farm Management
subject: Production Economics
subject: Productivity Analysis
subject: Comparative analysis
subject: Technical Efficiency
subject: fish production technologies

description: This study compared the technical efficiency of fish production under two management systems in Abeokuta metropolis, Ogun state, Nigeria. Primary data for this study were collected from forty-five fish farmers using earthen pond and thirty fish farmers using concrete pond through simple random sampling technique and complete enumeration techniques respectively. The Stochastic Frontier production function was employed for the determination of the technical efficiency of the fish farmers. Results revealed an average age of 44years and 46years for operators of concrete and earthen pond technologies respectively. They were mostly males and educated. There was a fairly high but almost equal technical efficiency scores in fish production for concrete (0.6429) and earthen pond (0.6432. Significant variables affecting fish production in concrete pond were stock size (α0.01) and feed (α0.05), while the factors affecting inefficiency was gender. For earthen pond technology the factors were pond size (α0.05), stock size (α0.01) and feed intake (α0.01), while the factors affecting inefficiency were age (α0.05), education level (α0.05) and household size (α0.10). Elasticity values for resources used for both technologies indicate that they were allocated and used in the stage II of the production process and that fish production in earthen pond technologies had higher feed conversion efficiency. The study recommended among others that, appropriate government agencies and community-based organisations, should encourage young and educated people to go into fish production as a precursor towards increasing technical efficiency of fish production.
The Chemical Evolution of Galaxy Clusters: Dissecting the Iron Mass Budget of the Intracluster Medium
Creators: name: Liu, Ang
name: Tozzi, Paolo
name: Ettori, Stefano
name: De Grandi, Sabrina
name: Gastaldello, Fabio
name: Rosati, Piero
name: Norman, Colin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We study the chemical evolution of galaxy clusters by measuring the iron mass in the ICM after dissecting the abundance profiles into different components. We use Chandra archival observations of 186 morphologically regular clusters in the redshift range [0.04, 1.07]. For each cluster we compute the iron abundance and gas density profiles. We aim at identifying in the iron distribution a central peak associated with the BCG, and an approximately constant plateau associated with early enrichment. We are able to firmly identify the two components in a significant fraction of the sample, simply relying on the fit of the abundance profile. We compute the iron mass included in the iron peak and plateau, and the gas mass-weighted iron abundance out to $r_{500}$. While the iron plateau shows no evolution, we find marginal decrease with redshift in the iron peak. We measure that the fraction of iron peak mass is typically a few percent (~1%) of the total iron mass within $r_{500}$. Therefore, since the total iron mass budget is dominated by the plateau, we find consistently that the global gas mass-weighted iron abundance does not evolve significantly. We are also able to reproduce past claims of evolution in the global iron abundance, which turn out to be due to the use of cluster samples with different selection methods combined to the use of emission-weighted instead of gas mass-weighted abundance values. Finally, while the intrinsic scatter in the iron plateau mass is consistent with zero, the iron peak mass exhibits a large scatter, in line with the fact that the peak is produced after the virialization of the halo and depends on the formation of the hosting cool core and the associated feedback processes. We conclude that only a spatially-resolved approach can resolve the issue of the ICM iron evolution, reconciling the contradictory results obtained in the last ten years.
description: Accepted for publication in A&A
Robustness of Tests for Error Components Models to Nonnormality
Creators: name: Blanchard, Pierre
name: Matyas, Laszlo
name: Blanchard, Pierre
name: Matyas, Laszlo
Publisher: name: Unknown
Year: 1994
Subjects: subject: Research Methods/ Statistical Methods
subject: Panel data
subject: Nonnormality
subject: Monte Carlo analysis
subject: Hypothesis testing
subject: Error components model

description: comprehensive empirical evaluation is presented of the sensitivity to nonnormality of the main tests for individual effects in a one—way error components panel data model.
Tariff Policy and Imperfect Competition
Creators: name: Myles, G. D.
name: Myles, G. D.
Publisher: name: Unknown
Year: 1988
Subjects: Agricultural and Food Policy
Financial Economics

description: A general equilibrium model of international trade with imperfect competition is presented and the existence of an equilibrium established. The model is applied to the analysis of tariff policy and conditions are derived under which factor price effects strengthen existing partial equilibrium arguments for tariffs. Nash equilibrium and collusive tariff setting are also analysed; collusive tariffs are lower provided there are no negative price effects linking the countries.
LEARNING RATIONAL EXPECTATIONS IN A POLICY GAME
Creators: name: Cripps, M. W.
name: Cripps, M. W.
Publisher: name: Unknown
Year: 1988
Subjects: Agricultural and Food Policy
Teaching/Communication/Extension/Profession

description: Rational expectations is a maintained assumption in the analysis of economic policy. Here we examine how two types of learning rational expectations (rational and econometric) affect the time profile of optimal policy. In both cases the government adopts policies which delay convergence to rational expectations. There is also a. reduction in the inflationary bias, in one case permanently in the other temporarily.
An Investigation into Sustainable Paints
Creators: name: Anderson, Catherine
name: Leung-Harrison, Sharleen
name: Wu, Mike
name: Yan, YunFei
name: Zhen, Jacky
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.”
(2+1)D Noncommutative CP$^{N-1}$ Model
Creators: name: Asano, E. A.
name: Gomes, M.
name: Rodrigues, A. G.
name: da Silva, A. J.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate possible extensions of the (2+1) dimensional $CP^{N-1}$ model to the noncommutative space. Up to the leading nontrivial order of 1/N, we prove that the model restricted to the left fundamental representation of the gauge group is renormalizable and does not have dangerous infrared divergences. In contrast, if the basic field $ϕ$ transforms in accord with the adjoint representation, infrared singularities are present in the two point function of the auxiliary gauge field and also in the leading correction to the self-energy of the $ϕ$ field. These infrared divergences may produce nonintegrable singularities leading at higher orders to a breakdown of the 1/N expansion. Gauge invariance of the renormalization procedure is also discussed.
description: 31 pages, 11 figures, revtex4, minor corrections in some equations and in the text
Development of Biorefineries in the Bioeconomy: A Fuzzy-Set Qualitative Comparative Analysis among European Countries
Creators: name: Ding, Zhengqiu
name: Grundmann, Philipp
Publisher: name: Humboldt-Universität zu Berlin
Year: 2021
Subjects: subject: bioeconomy development
subject: biorefineries
subject: transition framework
subject: configurations of conditions
subject: fuzzy-set
subject: qualitative comparative analysis
subject: 333.7 Landflächen, Naturräume für Freizeit und Erholung, Naturreservate, Energie

description: This study aims to identify the configurational conditions that characterize the establishment of biorefineries in 20 European countries. After determining the conditions which support a bioeconomy transition, secondary data from national sources are used to represent their existing conditions within respective countries. Then, a fuzzy-set qualitative comparative analysis is employed to compare and contrast the effect of varying combinations of the selected conditions on the development of biorefineries. The conditions chosen include coherent bioeconomy strategies, network intensity of regional bioclusters, intellectual capital, and natural resource availability. Our results reveal that the configuration of a coherent bioeconomy strategy, sizable public spending on R&D, abundant biomass supply, and a high level of network intensity is sufficient to explain the pronounced biorefineries development among some European countries. We recommend that countries with fragmented approaches review and redesign the policy and regulatory framework to create a holistic and consistent bioeconomy strategy, taking into account the configurations of conditions as an important prerequisite. In particular, factors such as the lack of best practice examples, the low level of public spending on research and development, the economic capacities for a skilled workforce in addition to the sustainable supply of raw materials should be addressed as focal points.
A Novel Twitter Sentiment Analysis Model with Baseline Correlation for Financial Market Prediction with Improved Efficiency
Creators: name: Guo, Xinyi
name: Li, Jinfeng
Publisher: name: arXiv
Year: 2020
Subjects: subject: Social and Information Networks (cs.SI)
subject: Machine Learning (cs.LG)
subject: Statistical Finance (q-fin.ST)
subject: FOS: Computer and information sciences
subject: FOS: Economics and business

description: A novel social networks sentiment analysis model is proposed based on Twitter sentiment score (TSS) for real-time prediction of the future stock market price FTSE 100, as compared with conventional econometric models of investor sentiment based on closed-end fund discount (CEFD). The proposed TSS model features a new baseline correlation approach, which not only exhibits a decent prediction accuracy, but also reduces the computation burden and enables a fast decision making without the knowledge of historical data. Polynomial regression, classification modelling and lexicon-based sentiment analysis are performed using R. The obtained TSS predicts the future stock market trend in advance by 15 time samples (30 working hours) with an accuracy of 67.22% using the proposed baseline criterion without referring to historical TSS or market data. Specifically, TSS's prediction performance of an upward market is found far better than that of a downward market. Under the logistic regression and linear discriminant analysis, the accuracy of TSS in predicting the upward trend of the future market achieves 97.87%.
description: 2019 Sixth IEEE International Conference on Social Networks Analysis, Management and Security (SNAMS)
title: Gene Expression Analysis of Telomerase Related Genes in Myeloid Malignancy
Creators: name: Campbell, Lisa Jane
Publisher: name: The Open University
Year: 2012

description: Telomere shortening and an increased telomerase activity are associated with poor prognosis and disease progression in many cancers. In Chronic Myeloid Leukaemia (CML) telomere shortening has a strong correlation with disease progression. Expression of hTERT, the catalytic component of telomerase, was evaluated in the CD34+ cells of CML patients. This revealed that expression of hTERT was significantly reduced in chronic phase CML and decreased with disease progression to accelerated phase and blast crisis. It could therefore be concluded that reduced hTERT expression contributes to reduced telomere length in CML. Additionally, expression of c-Myc, which increases hTERT transcription, correlated with hTERT expression suggesting decreased hTERT is partly caused by reduced c-Myc. hTERT promoter methylation and mutation status were investigated and this revealed that the hTERT promoter was not methylated and mutation rates were low suggesting that these are not contributing to reduced hTERT expression. cDNA microarrays were used to analyse gene expression in neutrophils of patients with Essential Thrombocythaemia (ET) harbouring the JAK2 V617F mutation which, like the BCR/ABL translocation in CML, results in an activated kinase. Neutrophils of ET patients exhibited a gene expression profile close to that of controls despite the presence of the mutation. Affymetrix microarrays were used to investigate the role of telomerase related genes in Myelodysplastic Syndromes (MDS). Genes decreased in patients with del(5q) include positive regulators of telomere length and genes with higher expression were associated with increased telomerase activity. Inferring that in these patients telomere length would be reduced but counteracted by increased expression of genes promoting telomerase activity. Genes that could differentiate between RA and RAEB2 subtypes were mostly related to telomere maintenance. These results demonstrate the complex role of telomerase and telomere length in malignancy and challenge the view that hTERT is always increased in cancer.
Lightweight hardware implementation of VVC transform block for ASIC decoder
Creators: name: Farhat, I.
name: Hamidouche, W.
name: Grill, A
name: Ménard, D.
name: Deforges, O.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Image and Video Processing (eess.IV)
subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Versatile Video Coding (VVC) is the next generation video coding standard expected by the end of 2020. Compared to its predecessor, VVC introduces new coding tools to make compression more efficient at the expense of higher computational complexity. This rises a need to design an efficient and optimised implementation especially for embedded platforms with limited memory and logic resources. One of the newly introduced tools in VVC is the Multiple Transform Selection (MTS). This latter involves three Discrete Cosine Transform (DCT)/Discrete Sine Transform (DST) types with larger and rectangular transform blocks. In this paper, an efficient hardware implementation of all DCT/DST transform types and sizes is proposed. The proposed design uses 32 multipliers in a pipelined architecture which targets an ASIC platform. It consists in a multi-standard architecture that supports the transform block of recent MPEG standards including AVC, HEVC and VVC. The architecture is optimized and removes unnecessary complexities found in other proposed architec-tures by using regular multipliers instead of multiple constant multi-pliers. The synthesized results show that the proposed method which sustain a constant throughput of two pixels/cycle and constant la-tency for all block sizes can reach an operational frequency of 600 Mhz enabling to decode in real-time 4K videos at 48 fps.
PROFIT-SHARING AND PRODUCTIVITY: AN ANALYSIS OF UK ENGINEERING FIRMS
Creators: name: Cable, John R.
name: Wilson, Nicholas
name: Cable, John R.
name: Wilson, Nicholas
Publisher: name: Unknown
Year: 1988
Subjects: Industrial Organization
Productivity Analysis

description: The paper reports productivity differentials of 3-8% in favour of profit-sharing firms in the UK engineering industry. The estimates come from equations in which profit-sharing interacts with factor input levels and/or the firms' technological, organisational and labour-force characteristics, and imply more than a simple incentive effect on work effort, or more 'cooperative' behaviour in given circumstances. Model-selection tests reveal that these models dominate those used in previous work, where profit-sharing enters as a disembodied, Nicks-neutral shift in the production surface. A technological labour relations interpretation of the origin of the gains is suggested, which are found to be asymmetrically distributed. The results question policy measures to encourage profit-sharing which do not take account of its significance in the process of organisational design.
Collisionless tangential discontinuity between pair plasma and electron-proton plasma
Creators: name: Dieckmann, Mark Eric
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: We study with a one-dimensional particle-in-cell (PIC) simulation the expansion of a pair cloud into a magnetized electron-proton plasma as well as the formation and subsequent propagation of a tangential discontinuity that separates both plasmas. Its propagation speed takes the value that balances the magnetic pressure of the discontinuity against the thermal pressure of the pair cloud and the ram pressure of the protons. Protons are accelerated by the discontinuity to a speed that exceeds the fast magnetosonic speed by the factor 10. A supercritical fast magnetosonic shock forms at the front of this beam. An increasing proton temperature downstream of the shock and ahead of the discontinuity leaves the latter intact. We create the discontinuity by injecting a pair cloud at a simulation boundary into a uniform electron-proton plasma, which is permeated by a perpendicular magnetic field. Collisionless tangential discontinuities in the relativistic pair jets of X-ray binaries (microquasars) are in permanent contact with the relativistic leptons of its inner cocoon and they become sources of radio synchrotron emissions.
description: 10 pages, 11 figures, accepted for publication in Physics of Plasmas