cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Galactic Census of High- and Medium-mass Protostars. I. Catalogues and First Results from Mopra HCO+ Maps
Creators: name: Barnes, Peter J.
name: Yonekura, Yoshinori
name: Fukui, Yasuo
name: Miller, Andrew T.
name: Mühlegger, Martin
name: Agars, Lawrence C.
name: Miyamoto, Yosuke
name: Furukawa, Naoko
name: Papadopoulos, George
name: Jones, Scott L.
name: Hernandez, Audra K.
name: O'Dougherty, Stefan N.
name: Tan, Jonathan C.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The Census of High- and Medium-mass Protostars (CHaMP) is the first large-scale, unbiased, uniform mapping survey at sub-parsec scale resolution of 90 GHz line emission from massive molecular clumps in the Milky Way. We present the first Mopra (ATNF) maps of the CHaMP survey region (300°>l>280°) in the HCO+ J=1-0 line, which is usually thought to trace gas at densities up to 10^11 m-3. In this paper we introduce the survey and its strategy, describe the observational and data reduction procedures, and give a complete catalogue of moment maps of the HCO+ J=1-0 emission from the ensemble of 301 massive molecular clumps. From these maps we also derive the physical parameters of the clumps, using standard molecular spectral-line analysis techniques. This analysis yields the following range of properties: integrated line intensity 1-30 K km s-1, peak line brightness 1-7 K, linewidth 1-10 km s-1, integrated line luminosity 0.5-200 K km s-1 pc^2, FWHM size 0.2-2.5 pc, mean projected axial ratio 2, optical depth 0.08-2, total surface density 30-3000 M{\sun} pc-2, number density 0.2-30 x 10^9 m-3, mass 15-8000 M{\sun}, virial parameter 1-55, and total gas pressure 0.3-700 pPa. We find that the CHaMP clumps do not obey a Larson-type size-linewidth relation. Among the clumps, there exists a large population of subthermally excited, weakly-emitting (but easily detectable) dense molecular clumps, confirming the prediction of Narayanan et al. (2008). These weakly-emitting clumps comprise 95% of all massive clumps by number, and 87% of the molecular mass, in this portion of the Galaxy; their properties are distinct from the brighter massive star-forming regions that are more typically studied. If the clumps evolve by slow contraction, the 95% of fainter clumps may represent a long-lived stage of pressure-confined, gravitationally stable massive clump evolution, while the CHaMP ... (abridged)
description: Submitted to ApJ; edited to referee's comments. 98 pages, 81 figures. For more information, see http://www.astro.ufl.edu/champ
From ppēsŭppol to yagu : the evolution of baseball and its terminology in Korean
Creators: name: Rivera, Natasha
Publisher: name: University of British Columbia
Year: 2015

description: Baseball has shaped not only the English language, but also American society. From the early development of professional sport, to spearheading integration with Jackie Robinson’s first appearance, to even deploying “baseball ambassadors” in Japan as wartime spies, baseball has been at the forefront of societal change even as its popularity declined in the United States. Nonetheless, the sport’s global presence remains strong, presenting us with an opportunity to examine how baseball has shaped language and society outside North America. Baseball has an extensive set of specialized terms. Whether these words are homonyms of other English terms, or idioms unique to the sport, each term is vital to the play of the game and must be accounted for when introducing baseball to a new country. There are various ways to contend with this problem: importing the terms wholesale as loanwords, or coining neologisms that correspond to each term. Contemporary Korean baseball terminology is the still-evolving product of a historically contingent competition between two sets of vocabulary: the English and the Japanese. Having been first introduced by American missionaries and the YMCA, baseball was effectively “brought up” by the already baseball-loving Japanese who occupied Korea as colonizers shortly after baseball’s first appearance there in 1905. With no professional league of its own until 1982, Korean would remain under the strongest influence from Japan. This thesis is an account of the evolution of baseball terminology in Korean. This process of change is intertwined with Japanese colonialism and the multilayered process of globalization, which shaped not only Korean baseball vocabulary but Korean language identities writ large. While baseball has never been Korea’s favourite sport, it has often been seen as a form of non-violent resistance to Japanese oppression. Why is it then that a large amount of Korea’s baseball terminology to this day remains Japanese in origin? Even as Japan itself shifts toward using more English baseball terms in Japanese, Korea and Korean have seen fewer changes. The socio-political climate in which Korean baseball evolved has likewise influenced the changes in terminology, which will be analysed here using new data gathered from primary sources.
Duality linking standard and tachyon scalar field cosmologies
Creators: name: Avelino, P. P.
name: Bazeia, D.
name: Losano, L.
name: Oliveira, J. C. R. E.
name: Pavan, A. B.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this work we investigate the duality linking standard and tachyon scalar field cosmologies. We determine the transformation between standard and tachyon scalar fields and between their associated potentials, corresponding to the same background evolution. We show that, in general, the duality is broken at a perturbative level, when deviations from a homogeneous and isotropic background are taken into account. However, we find that for slow-rolling fields the duality is still preserved at a linear level. We illustrate our results with specific examples of cosmological relevance, where the correspondence between scalar and tachyon scalar field models can be calculated explicitly.
description: 8 pages
Impact of (long) COVID on athletes’ performance: a prospective study in elite football players
Creators: name: Wezenbeek, E.
name: Denolf, S.
name: Bourgois, J. G.
name: Philippaerts, R. M.
name: De Winne, B.
name: Willems, T. M.
name: Witvrouw, E.
name: Verstockt, S.
name: Schuermans, J.
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Physiology
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 110309 Infectious Diseases

description: To investigate possible persistent performance deficits after severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection in elite athletes. A prospective cohort study in three Belgian professional male football teams was performed during the 2020 − 2021 season. Participants were submitted to strength, jump, and sprint tests and an aerobic performance test (the Yo-Yo Intermittent Recovery test (YYIR)). These tests were repeated at fixed time intervals throughout the season. Assessment of SARS-CoV-2 infection was performed by a polymerase chain reaction (PCR) test before each official game. Of the 84 included participants, 22 were infected with SARS-CoV-2 during follow-up. At the first testing after infection (52.0 ± 11.2 days after positive PCR testing) significantly higher percentages of maximal heart rate (%HRmax) were seen – within the isolated group of infected players- during (p = .006) and after the YYIR (2 min after, p = .013), compared to pre-infection data. This increase in %HRmax was resolved at the second YYIR testing after infection (127.6 ± 33.1 days after positive PCR testing). Additionally, when comparing the first test after infection in formerly infected to non-infected athletes, significantly higher %HRmax were found during (p < .001) and after the YYIR test (p < .001),No significant deficits were found for the jump, muscular strength or sprint tests. Aerobic performance seems compromised even weeks after infection. Simultaneously, anaerobic performance seemed to be spared. Because of the potential detrimental effects on the immune system, caution might be advised with high-intensity exposure until aerobic performance is restored.KEY MESSAGESElite football players’ aerobic performance seems to be affected for weeks after they return to sports after a SARS-CoV-2 infection.Similarly, anaerobic performance tests showed no discernible changes between both before and after SARS-CoV-2 infections.Regular YYIR testing is recommended to monitor aerobic performance after SARS-CoV-2 infection. Elite football players’ aerobic performance seems to be affected for weeks after they return to sports after a SARS-CoV-2 infection. Similarly, anaerobic performance tests showed no discernible changes between both before and after SARS-CoV-2 infections. Regular YYIR testing is recommended to monitor aerobic performance after SARS-CoV-2 infection.
Generalized Geologic Map for Land-Use Planning: Logan County, Kentucky
Creators: name: Beck, E. Glynn
name: Williams, David A.
name: Carey, Daniel I.
Publisher: name: Kentucky Geological Survey, University of Kentucky
Year: 2005

description: Abstract:
This map is not intended to be used for selecting individual sites. Its purpose if to inform land-use planners, government officials, and the public in a general way about geologic bedrock conditions that affect the selection of sites for various purposes. The properties of thick soils may supercede those of the underlying bedrock and should be considered on a site-to-site basis. At any site, it is important to understand the characteristics of both the soils and the underlying rock.
Chiral dynamics of the S11(1535) and S11(1650) resonances revisited
Creators: name: Bruns, Peter C.
name: Mai, Maxim
name: Meißner, U. -G.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We analyze s-wave pion-nucleon scattering in a unitarized chiral effective Lagrangian including all dimension two contact terms. We find that both the S11(1535) and the S11(1650) are dynamically generated, but the S31(1620) is not. We further discuss the structure of these dynamically generated resonances.
description: 7 pages, 5 figures, version to be published in PLB
When was the Large Magellanic Cloud accreted onto the Galaxy ?
Creators: name: Bekki, Kenji
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Using fully self-consistent N-body models for the dynamical evolution of the Large Magellanic Cloud (LMC) in the Galaxy, we show that if the LMC initially has an extended old stellar halo before its commencement of tidal interaction with the Galaxy, physical properties of the stars stripped from the LMC stellar halo can have fossil information as to when and where the LMC was accreted onto the Galaxy for the first time. If the epoch of the first LMC accretion onto the Galaxy from outside its viriral radius is more than ~4 Gyr ago (i.e., at least two pericenter passages), the stars stripped from the stellar halo of the LMC can form an irregular polar ring or a thick disk with a size of ~100 kpc and rotational kinematics. On the other hand, if the LMC was first accreted onto the Galaxy quite recently (~ 2 Gyr ago), the stripped stars form shorter leading and trailing stellar stream at R=50-120 kpc. Also distributions of the stripped stars in phase space between the two cases can be significantly different. The derived differences in structure and kinematics of the stripped stars therefore suggest that if we compare the observed three-dimensional (3D) distribution and kinematics of the outer Galactic stellar halo along the polar-axis, then we can give strong constraints on the past orbit of the LMC. We find that the orbital properties of the LMC in the successful formation models of the Magellanic Stream (MS) are consistent with those predicted from recent LambdaCDM cosmological simulations. We conclude that the LMC was accreted onto the Galaxy more than ~4 Gyr ago so that interaction between the LMC, the Small Magellanic Cloud (SMC), and the Galaxy could form the MS and its Leading Arms (LAs).
description: 10 pages, 8 figures, accepted in MNRAS
MOESM1 of Immunomodulatory effects of a new whole ingredients extract from Astragalus: a combined evaluation on chemistry and pharmacology
Creators: name: Li, Zhi
name: Zhao, Guan
name: Xiong, Wei
name: Linghu, Ke
name: Ma, Qiu
name: Cheang, Wai
name: Yu, Hua
name: Wang, Yitao
Publisher: name: figshare
Year: 2019
Subjects: Biochemistry
Medicine
Molecular Biology
Pharmacology
Chemical Sciences not elsewhere classified
Biological Sciences not elsewhere classified
Information Systems not elsewhere classified
Science Policy

description: Additional file 1. Minimum standards of reporting checklist.
A Survey of M Stars in the Field of View of Kepler Space Telescope
Creators: name: Oshagh, Mahmoudreza
name: Haghighipour, Nader
name: Santos, Nuno C.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: M dwarfs constitute more than 70% of the stars in the solar neighborhood. They are cooler and smaller than Sun-like stars and have less-massive disks which suggests that planets around these stars are more likely to be Neptune-size or smaller. The transit depths and transit times of planets around M stars are large and well-matched to the Kepler temporal resolution. As a result, M stars have been of particular interest for searching for planets in both radial velocity and transit photometry surveys. We have recently started a project on searching for possible planet-hosting M stars in the publicly available data from Kepler space telescope. We have used four criteria, namely, the magnitude, proper motion, H-Ks and J-H colors, and searched for M stars in Q0 and Q1 data sets. We have been able to find 108 M stars among which 54 had not been previously identified among Kepler's targets. We discuss the details of our selection process and present the results.
description: 2 pages, 1 table, To be published in proceedings of the IAU Symposium No.276
Lattice-Driven Magnetoresistivity and Metal-Insulator Transition in Single-Layered Iridates
Creators: name: Ge, M.
name: Qi, T. F.
name: Korneta, O. B.
name: De Long, D. E.
name: Schlottmann, P.
name: Crummett, W. P.
name: Cao, G.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Sr2IrO4 exhibits a novel insulating state driven by spin-orbit interactions. We report two novel phenomena, namely a large magnetoresistivity in Sr2IrO4 that is extremely sensitive to the orientation of magnetic field but exhibits no apparent correlation with the magnetization, and a robust metallic state that is induced by dilute electron (La3+) or hole (K+) doping for Sr2+ ions in Sr2IrO4. Our structural, transport and magnetic data reveal that a strong spin-orbit interaction alters the balance between the competing energies so profoundly that (1) the spin degree of freedom alone is no longer a dominant force; (2) underlying transport properties delicately hinge on the Ir-O-Ir bond angle via a strong magnetoelastic coupling; and (3) a highly insulating state in Sr2IrO4 is proximate to a metallic state, and the transition is governed by lattice distortions. This work suggests that a novel class of lattice-driven electronic materials can be developed for applications.
description: 4 figures
Thermodynamic Properties of Kagome Lattice in ZnCu_3(OH)_6Cl_2 Herbertsmithite
Creators: name: Shaginyan, V. R.
name: Msezane, A. Z.
name: Popov, K. G.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Strongly correlated Fermi systems are among the most intriguing and fundamental systems in physics, whose realization in some compounds is still to be discovered. We show that herbertsmithite ZnCu_3(OH)_6Cl_2 can be viewed as a strongly correlated Fermi system whose low temperature thermodynamic in magnetic fields is defined by a quantum critical spin liquid. Our calculations of its thermodynamic properties are in good agreement with recent experimental facts and allow us to reveal their scaling behavior which strongly resembles that observed in HF metals and 2D 3He.
description: 4 pages, 6 figures
Synthesis Methodology D2.4 Final report
Creators: name: Chatterjee, Souran
name: Ürge-Vorsatz, Diana
name: Thema, Johannes
name: Kelemen, Ágnes
Publisher: name: Zenodo
Year: 2018
Subjects: co-benefits; Cost-benefit analysis; additionality, context dependency

description: The COMBI project quantifies different multiple impacts (MI) of energy efficiency improvement
 (EEI) actions, which require different type of assessment approaches (methodologies). In addition,
 many of the impacts overlap with each other either due to estimation techniques or theoretically,
 which makes their aggregation challenging. In addition, different impacts are quantified in
 different units, rendering aggregation impossible until and unless a common unit is found.
 Therefore, there is a need for an overarching aggregation methodology in order to incorporate
 quantified impacts into a decision-making framework such as cost-benefit analysis.
 The purpose of this report is to document the methodology used to aggregate and synthesise the
 multiple impacts in the COMBI project. It also eludes to the general lessons learned in terms of
 aggregating quantified multiple impacts from energy efficiency actions in a general sense.
 As one of the key conclusions of the project is that quantifying and aggregating multiple impacts
 of energy efficiency actions is very complex, resource and time intensive due to their major
 context dependency. Therefore it is pivotal that as many generally applicable lessons can be
 drawn from the project as possible in order to minimise future efforts for MI aggregation and
 catalyse more simplified future MI quantifications.
Quantized Nambu-Poisson Manifolds in a 3-Lie Algebra Reduced Model
Creators: name: DeBellis, Joshua
name: Saemann, Christian
name: Szabo, Richard J.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Quantum Algebra (math.QA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We consider dimensional reduction of the Bagger-Lambert-Gustavsson theory to a zero-dimensional 3-Lie algebra model and construct various stable solutions corresponding to quantized Nambu-Poisson manifolds. A recently proposed Higgs mechanism reduces this model to the IKKT matrix model. We find that in the strong coupling limit, our solutions correspond to ordinary noncommutative spaces arising as stable solutions in the IKKT model with D-brane backgrounds. In particular, this happens for S^3, R^3 and five-dimensional Neveu-Schwarz Hpp-waves. We expand our model around these backgrounds and find effective noncommutative field theories with complicated interactions involving higher-derivative terms. We also describe the relation of our reduced model to a cubic supermatrix model based on an osp(1|32) supersymmetry algebra.
description: 22 pages
Breaking the line
Creators: name: Vincent, Adam R.
Publisher: name: University of British Columbia
Year: 2015

description: As a mode of academic discourse, poetry offers pathways that lead to new and diverse ways of understanding. However, in my experiences as a learner and as an Instructional Associate at the Learning Centre at Kwantlen Polytechnic University (KPU), I have found that poetry is not being utilized to its fullest capacity in the teaching of writing and in the exploration of language. The following thesis-performance hybrid is intended to illustrate the value of poetry as an approach to teaching writing and as an academic discourse, demonstrated largely through the medium of poetry itself. The technique of métissage has been selected to enhance the performative elements by intertwining life writing, various forms and types of poetry and significant citations from the literature. The life writing in the following text adopts conventions of autoethnography and biography, while the poetry reflects aspects of poetic inquiry. Through embracing a hybrid approach, which fuses various types of texts, the work explores the value in the greater use of poetry and the greater use of hybrid texts and forms of written assignments in the practice of teaching writing. This thesis-performance hybrid seeks to embody the very concepts being explored within it.
The nearby eclipsing stellar system delta Velorum III. Self-consistent fundamental parameters and distance
Creators: name: Merand, A.
name: Kervella, P.
name: Pribulla, T.
name: Petr-Gotzens, M. G.
name: Benisty, M.
name: Natta, A.
name: Duvert, G.
name: Schertl, D.
name: Vannier, M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The triple stellar system delta Vel (composed of two A-type and one F-type main sequence stars) is particularly interesting as it contains one of the nearest and brightest eclipsing binaries. It therefore presents a unique opportunity to determine independently the physical properties of the three components of the system, as well as its distance. We aim at determining the fundamental parameters (masses, radii, luminosities, rotational velocities) of the three components of delta Vel, as well as the parallax of the system, independently from the existing Hipparcos} measurement. We determined dynamical masses from high-precision astrometry of the orbits of Aab-B and Aa-Ab using adaptive optics (VLT/NACO) and optical interferometry (VLTI/AMBER). The main component is an eclipsing binary composed of two early A-type stars in rapid rotation. We modeled the photometric and radial velocity measurements of the eclipsing pair Aa-Ab using a self consistent method based on physical parameters (mass, radius, luminosity, rotational velocity). From our self-consistent modeling of the primary and secondary components of the delta Vel A eclipsing pair, we derive their fundamental parameters with a typical accuracy of 1%. We find that they have similar masses, respectively 2.43+/-0.02Msol and 2.27+/-0.02Msol. The physical parameters of the tertiary component (delta Vel B) are also estimated, although to a lower accuracy. We obtain a parallax of 39.8+/-0.4mas for the system, in satisfactory agreement (-1.2 sigma) with the Hipparcos value (40.5+/-0.4mas). The physical parameters we derive represent a consistent set of constraints for the evolutionary modeling of this system. The agreement of the parallax we measure with the Hipparcos value to a 1% accuracy is also an interesting confirmation of the true accuracy of these two independent measurements.
description: Accepted for publication in Astronomy and Astrophysics
The Shortest Period Detached Binary White Dwarf System
Creators: name: Kilic, Mukremin
name: Brown, Warren R.
name: Kenyon, S. J.
name: Prieto, Carlos Allende
name: Andrews, J.
name: Kleinman, S. J.
name: Winget, K. I.
name: Winget, D. E.
name: Hermes, J. J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We identify SDSS J010657.39-100003.3 (hereafter J0106-1000) as the shortest period detached binary white dwarf (WD) system currently known. We targeted J0106-1000 as part of our radial velocity program to search for companions around known extremely low-mass (ELM, ~ 0.2 Msol) WDs using the 6.5m MMT. We detect peak-to-peak radial velocity variations of 740 km/s with an orbital period of 39.1 min. The mass function and optical photometry rule out a main-sequence star companion. Follow-up high-speed photometric observations obtained at the McDonald 2.1m telescope reveal ellipsoidal variations from the distorted primary but no eclipses. This is the first example of a tidally distorted WD. Modeling the lightcurve, we constrain the inclination angle of the system to be 67 +- 13 deg. J0106-1000 contains a pair of WDs (0.17 Msol primary + 0.43 Msol invisible secondary) at a separation of 0.32 Rsol. The two WDs will merge in 37 Myr and most likely form a core He-burning single subdwarf star. J0106-1000 is the shortest timescale merger system currently known. The gravitational wave strain from J0106-1000 is at the detection limit of the Laser Interferometer Space Antenna (LISA). However, accurate ephemeris and orbital period measurements may enable LISA to detect J0106-1000 above the Galactic background noise.
description: MNRAS Letters, in press
LEA_ D4.1Current State-of-the-Art Report 2018 and Beyond
Creators: name: Clements, Kati
name: Muilu, Mikko
name: Lounaskorpi, Petri
name: Sikström, Pieta
Publisher: name: Zenodo
Year: 2019
Subjects: learning technology, innovation procurement, state-of-art, open market consultation

description: This is the LEA state-of-the-art (SotA) Learning technologies report which introduces

the stage of innovation in learning technologies in 2018. This state-of-the-art

analysis is the baseline for LEA project’s PPI and PCP proposal preparation. In the

Open Market Consultation these issues will be revisted and updated. This

report will look into the state of learning technologies in the market based on the

IMAILE extensive D2.1 Need and market analysis with identified Gap, which was

conducted in July 2015. This report focuses on what has happened in Learning

technologies over the last three years.

This report will be a common tool  to use

for dialogue and to create a common understanding of Learntech for all

stakeholders and in particular to train procurers into understanding the potential

assistance which the solutions in the market could provide for their schools,

teachers & students. This report will be the base of LEA PPI open market

consultation and IPR search of innovative solutions according to the demand

identified in WP 3.

This state-of-the-art study was conducted by a case study approach on key

personalized learning environment suppliers. Eight companies were interviewed

and they were asked to demonstrate their innovative features. The future trends

were mainly explored through a literature review method.
Neutron Star Astronomy with the HST
Creators: name: Mignani, R. P.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Since its launch in 1990, HST has played a leading role in optical studies of isolated neutron stars, both radio-loud pulsars and radio-silent ones, paving the way to follow-up observations performed with 8m-class telescopes, like the VLT, the Gemini, and Subaru. Here, I present the last results obtained mostly by the WFPC2, before its de-commissioning during the last refurbishment mission in May 2009, from the observations of the rotation-powered pulsars PSR B0540-69, PSR B1055-52 and of the CCO 1E 1207.4-5209 in the PKS 1209-52 SNR.
description: 4 pages, to be published in Proceedings of "Pulsar Conference" 2010, held in Chia (Sardinia, Italy) on 10-15 October 2010, AIP, in press
Modelling of laboratory data of bi-directional reflectance of regolith surface containing Alumina
Creators: name: Bhattacharjee, C.
name: Deb, D.
name: Das, H. S.
name: Sen, A. K.
name: Gupta, R.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Bidirectional reflectance of a surface is defined as the ratio of the scattered radiation at the detector to the incident irradiance as a function of geometry. The accurate knowledge of the bidirectional reflection function (BRF) of layers composed of discrete, randomly positioned scattering particles is very essential for many remote sensing, engineering, biophysical applications and in different areas of Astrophysics. The computations of BRF's for plane parallel particulate layers are usually reduced to solve the radiative transfer equation (RTE) by the existing techniques. In this work we present our laboratory data on bidirectional reflectance versus phase angle for two sample sizes of 0.3 and 1 $μm$ of Alumina for the He-Ne laser at 632.8 nm (red) and 543.5nm(green) wavelength. The nature of the phase curves of the asteroids depends on the parameters like- particle size, composition, porosity, roughness etc. In our present work we analyse the data which are being generated using single scattering phase function i.e. Mie theory considering particles to be compact sphere. The well known Hapke formula will be considered along with different particle phase function such as Mie and Henyey Greenstein etc to model the laboratory data obtained at the asteroid laboratory of Assam University.
description: 5 pages, 5 figures [accepted for publication in Publications of the Astronomical Society of Australia (PASA) on 8 June, 2011]
Projected central dark matter fractions and densities in massive early-type galaxies from the Sloan Digital Sky Survey
Creators: name: Grillo, Claudio
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We investigate in massive early-type galaxies the variation of their two-dimensional central fraction of dark over total mass and dark matter density as a function of stellar mass, central stellar velocity dispersion, effective radius, and central surface stellar mass density. We use a sample of ~ 1.7 x 10^5 galaxies from the SDSS DR7 at redshift smaller than 0.33. We apply conservative photometric and spectroscopic cuts to select galaxies with physical properties similar to those of the lenses studied in the SLACS Survey. The values of the galaxy stellar and total mass projected inside a cylinder of radius equal to the effective radius are obtained, respectively, by fitting the SDSS multicolor photometry with stellar population synthesis models, under the assumption of a Chabrier stellar IMF, and adopting a one-component isothermal total mass model with effective velocity dispersion approximated by the central stellar velocity dispersion. We find that within the effective radius the stellar mass estimates differ from the total ones by only a relatively constant proportionality factor. In detail, we observe that the values of the projected fraction of dark over total mass and the logarithmic values of the central surface dark matter density (measured in M_{Sun} kpc^{-2}) have almost Gaussian probability distribution functions, with median values of 0.64^{+0.08}_{-0.11} and 9.1^{+0.2}_{-0.2}, respectively. Our results disfavor an interpretation of the tilt of the FP in terms of differences in the galaxy dark matter content and give useful information on the possible variations of the galaxy stellar IMF and dark matter density profile. Finally, we provide some observational evidence on the likely significant contribution of dry minor mergers, feedback from active galactic nuclei, and/or coalescence of binary black holes on the formation and evolution of massive early-type galaxies.
description: 16 pages, 4 figures, The Astrophysical Journal, in press
Piercing an interface with a brush: collaborative stiffening
Creators: name: Chiodi, F.
name: Roman, B.
name: Bico, J.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences
subject: 82D30

description: The hairs of a painting brush withdrawn from a wetting liquid self-assemble into clumps whose sizes rely on a balance between liquid surface tension and hairs bending rigidity. Here we study the situation of an immersed carpet in an evaporating liquid bath : the free extremities of the hairs are forced to pierce the liquid interface. The compressive capillary force on the tip of flexible hairs leads to buckling and collapse. However we find that the spontaneous association of hairs into stronger bundles may allow them to resist capillary buckling. We explore in detail the different structures obtained and compare them with similar patterns observed in micro-structured surfaces such as carbon nanotubes "forests".
description: 9 pages, 6 figures
Sustainable solutions for municipal solid waste treatment : a multi-stakeholder decision-making
Creators: name: Soltani, Atousa
Publisher: name: University of British Columbia
Year: 2015

description: Municipal solid waste treatment options are not necessarily pragmatic if their long-term benefits don’t mutually satisfy all related stakeholders such as industry, municipality, etc. Stakeholders are inclined to select an option with the maximized benefits and minimized lifecycle costs. A decision support framework is needed to identify and evaluate available waste treatment options under diverse multiple criteria and conflicting preferences of multiple stakeholders. This study developed a decision support framework that guides stakeholders to reach an agreement on the most sustainable and pragmatic waste treatment option. The framework compares lifecycle sustainability impacts of different waste treatment options and uses Analytical Hierarchy Process to determine a weighting scheme, which has an ability to combine diverse impacts based on stakeholders’ preferences. It also employs Game Theory to model stakeholders’ dialogues and behaviors in the group decision-making. The outcome of the framework is to recommend fair shares of costs and benefits to assist stakeholders in reaching a mutually agreeable solution. The application of the developed framework is demonstrated through a case study of waste treatment in Metro Vancouver (British Columbia, Canada), where the industry and the municipality are proposing the production of Refuse Derived Fuel (RDF). Results show that both industry and the municipality may benefit from RDF and waste-to-energy options, respectively; however as a compromised solution, the industry should pay a tipping fee to access the required amount of solid waste from the Metro Vancouver to substitute the use of fossil fuels with RDF. Uncertainty is unavoidable due to the inherent complexity in the methods and input data, and should be acknowledged to enhance the reliability in decision-making process. Most common uncertainties encountered in such environmental management problems are in cost and benefit estimates, and stakeholders’ ability in verbalizing their preferences, and their knowledge about each other’s priorities. The decision support framework used sensitivity analysis, Fuzzy Set Theory, and Bayesian Games to study the uncertainty impacts on the decision-making process.
Dynamical heterogeneity in soft particle suspensions under shear
Creators: name: Nordstrom, K. N.
name: Gollub, J. P.
name: Durian, D. J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We present experimental measurements of dynamical heterogeneities in a dense system of microgel spheres, sheared at different rates and at different packing fractions in a microfluidic channel, and visualized with high speed digital video microscopy. A four-point dynamic susceptibility is deduced from video correlations, and is found to exhibit a peak that grows in height and shifts to longer times as the jamming transition is approached from two different directions. In particular, the time for particle-size root-mean square relative displacements is found to scale as $τ^* \sim (\dot γΔϕ^4)^{-1}$ where $\dotγ$ is the strain rate and $Δϕ=|ϕ-ϕ_c|$ is the distance from the random close packing volume fraction. The typical number of particles in a dynamical heterogeneity is deduced from the susceptibility peak height and found to scale as $n^* \sim (\dot γΔϕ^4)^{-0.3}$. Exponent uncertainties are less than ten percent. We emphasize that the same power-law behavior is found at packing fractions above and below $ϕ_c$. Thus, our results considerably extend a previous observation of $n^* \sim \dotγ^{-0.3}$ for granular heap flow at fixed packing below $ϕ_c$. Furthermore, the implied result $n^*\sim (τ^*)^{0.3}$ compares well with expectation from mode-coupling theory and with prior observations for driven granular systems.
Renormalization Group Evolution of the Effective Potential in the Broken Symmetry Phase
Creators: name: Kim, Chungku
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate the renormalization group(RG) evolution for the neutral scalar field theory in the broken symmetry phase. By using the minimum condition of the vacuum expectation value(VEV), we show that the RG evlution of the effective potential in the broken symmetry phase is governed by the same RG functions in case of the symmetric phase.
description: 4 pages, no figure
Hidden Sp(2s+1)- or SO(2s+1)-symmetry and new exactly solvable models in ultracold atomic systems
Creators: name: Jiang, Yuzhu
name: Cao, Junpeng
name: Wang, Yupeng
Publisher: name: arXiv
Year: 2010
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The high spin ultracold atom models with a special form of contact interactions, i.e., the scattering lengthes in the total spin-$2,4 \cdots$ channels are equal but may be different from that in the spin-0 channel, is studied. It is found that those models have either $Sp(2s+1)$-symmetry for the fermions or $SO(2s+1)$-symmetry for the bosons in the spin sector. Based on the symmetry analysis, a new class of exactly solvable models is proposed and solved via the Bethe ansatz. The ground states for repulsive fermions are also discussed.
description: 6 pages, 2 figures
Registration of Polymers under REACH: Revisiting the Scientific Background and its Implications.
Creators: name: Groh, Ksenia
name: Ligthart, Jerker
name: Romano, Dolores
name: Muncke, Jane
Publisher: name: Zenodo
Year: 2021
Subjects: polymers; Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH); risk assessment; European Commission; precautionary principle

description: This upload pertains to the electronic poster (ePoster) titled "Registration of Polymers under REACH: Revisiting the Scientific Background and its Implications," by Ksenia Groh, Jerker Ligthart, Dolores Romano and Jane Muncke, which was presented at the SETAC Europe 31st Annual Meeting "Global challenges. An emergency for environmental sciences" that took place online in May 2021. The uploaded materials include the poster itself (file "Groh_et_al_ePoster_polymers_SetacEU2021.pdf) as well as a summary document (file "Groh_SummaryDocument_for_ePoster_REACHpolymers_SetacEU2021.pdf) and a summary video (file Groh_SummaryVideo_for_ePoster_polymers_SetacEU2021.mp4), which were both originally presented together with the poster (hence the "ePoster" format).
description: "SETAC" stands for "Society of Environmental Toxicology and Chemistry".
Electron spectrum of epitaxial graphene monolayers
Creators: name: Pankratov, Oleg
name: Hensel, Stephan
name: Bockstedte, Michel
Publisher: name: arXiv
Year: 2010
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Epitaxial graphene on SiC possesses, quite remarkably, an electron spectrum similar to that of freestanding samples. Yet, the coupling to the substrate, albeit small, affects the quasiparticle properties. Combining \emph{ab initio} calculations with symmetry analysis, we derive a modified Dirac-Weyl Hamiltonian for graphene epilayers. While for the epilayer on the C-face the Dirac cone remains almost intact, for epilayers on the Si-face the band splitting is about 30\,meV. At certain energies, the Dirac bands are significantly distorted by the resonant interaction with interface states, which should lead to mobility suppression, especially on the Si-face.
description: 5 pages, 2 figures
FACTORS INFLUENCING THE ADOPTION OF E-GOVERNMENT SERVICES IN KURDISTAN REGIONAL GOVERNMENT: THE CASE OF MINISTRY OF TRANSPORTATION AND COMMUNICATION
Creators: name: MZORY, HAVAL SDEEK
Publisher: name: Zenodo
Year: 2016
Subjects: ADOPTION OF E-GOVERNMENT SERVICES, KURDISTAN REGION, IRAQ

description: As more regional governments in the developing world experience autonomy over budgets and other affairs, the Kurdistan Regional Government (KRG) of Iraq is faced with the responsibility of providing increasingly efficient services to meet the growing demand of local population. This study identified several distinct variables that influence the need to implement e-government services such as: availability; trustworthiness; security; electronic divide; public understanding; mainstreaming; level of education; public acceptance; legal framework; politics; culture; attitude; and privacy. Research questions consisted of factors influenced the adoption e- government by KRG’s Ministries of Transportation and Communication, regarding the technological, organisational, and cultural challenges faced by the ministry. Research methodology consisted of quantitative and qualitative analyses. The sampled population consisted of government employees working at the Ministry of Transportation and Communication and common citizens as users of government services. Research findings presented are as following; Transformation to e- government services should be treated as a reform and restructuring process, and not merely the computerization of government operations; Improving people’s awareness can be achieved by delivering training and advertisement of available e- government services; Borrow ideas from other regions or countries that have successfully implemented similar e-government projects; Understand the basic reasons for pursuing e-government services before committing the time and resources; and political support is necessary to successfully implement and launch e- government services initiative. This study also concludes that the intent to deploy e- government in developing countries has increased the adoption and use of technology, as well as cultural challenges being faced.
description: DBA Theses
Identification of cytokine induced changes to the pancreatic islet epigenome
Creators: name: Hurley, Peter Eliol
Publisher: name: University of British Columbia
Year: 2015

description: The initial onset of type 1 diabetes, as well as islet graft rejection, is characterized by the autoimmune assault on the β-cells of the pancreatic islets of Langerhans. Resident and infiltrating immune cells secrete a cocktail of cytokines, such as IFNγ, Il-1β, and TNFα, which in turn, signal the β-cells to produce and secrete various chemokines and cytokines that lead to the recruitment of additional immune cells, eventually leading to β-cell failure and death. During these processes the expression of many genes becomes altered within β-cells, and we hypothesized that alterations to the chromatin states of β-cell cis-regulatory regions underlies these gene expression changes. The chromatin state of a given cis-regulatory region can be identified by the pattern of post-translational histone modifications on adjacent nucleosomes. For this study we focused on 4 histone modifications: Histone 3 Lysine 4 monomethylation (H3K4me1) and trimethylation (H3K4me3), Histone 3 Lysine 9 trimethylation (H3K9me3) and Histone 3 Lysine 27 trimethylation (H3K27me3); with a particular focus on H3K4me1 that is associated with active or poised enhancers and promoters. Our ChIP-Seq analysis revealed that, upon IFNγ, Il-1β, and TNFα exposure, many genomic regions in β-cells acquire de novo H3K4me1, despite being initially marked by the repressive histone modification H3K27me3. Many chemokine and cytokine genes were associated with these de novo enhancer regions, and the expression of many of these chemokine and cytokine genes is induced in islets exposed to IFNγ, Il-1β, and TNFα. We identified the Trithorax group (TrxG) complexes as likely candidates involved in the generation of these de novo enhancers, as they can contain proteins with H3K4 methyltransferase and H3K27me3 demethylase activity. To confirm the involvement of these complexes we attempted to block their activity by using an adenovirus expressing shRNAs targeting the core TrxG complex subunit Wdr5, and by using a small molecule selective inhibitor (GSK-J4) of the H3K27me demethylases Utx and Jmjd3. Both approaches resulted in blunting of the IFNγ, Il-1β, and TNFα induced expression of proinflammatory cytokines, with GSK-J4 having a more pronounced effect.
Optomechanical microwave amplification without mechanical amplification and Surprising physics of a single mass on two springs
Creators: name: Steele, Gary
Publisher: name: Zenodo
Year: 2021

description: A talk from the HOT / OMT annual meeting in 2020 in which I present our results on an unusual type of cavity optomechanical amplification, along with a pedagogical derivation of the physical origin of "dissipation dilution" in high-stress mechanical resonators based on the principle of geometric nonlinearity, illustrated using the equations of a single mass on two springs.
Data workflow: from raw data to archiving
Creators: name: Ferrachat Sylvaine
Publisher: name: Zenodo
Year: 2019
Subjects: FAIR
data management
data workflow
data repositories
licensing
climate sciences

description: Presentation about data workflow and FAIR principles given at the C2SM data management workshop (March 7th, 2019).

Target audience: students.

Context / domain science: atmospheric and climate sciences