cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Regional planning in Alberta : The evolution of Alberta’s system of regional planning commissions
Creators: name: Dragushan, Graham N. G.
Publisher: name: University of British Columbia
Year: 2010

description: Planning legislation in Alberta, particularly in the area of regional planning, has long been thought to be in the forefront of planning efforts in Canada. However, Alberta's experience has also been described as a lost opportunity and with the enactment of Alberta's new Planning Act, it is now appropriate to review the system of regional planning in Alberta. The objective of the thesis is to provide an understanding of the system of regional planning in Alberta by analysis of the evolution of the structure of the regional planning commission - the institution responsible for regional planning. In this thesis, a sequence of theoretical perspectives was identified including: Regionalism (establishing the concept of regions and regional evolution and identifying centralizing and decentralizing strategies for government organization); Regional Planning (defining criteria for successful institional [sic] arrangements for regional planning); and Representation (providing a context for analysis of political representation of regional authorities). This was followed by a description of the evolution of the regional planning commission system in the province, especially that of the Edmonton Regional Planning Commission. It was traced through statute research, relevant literature, and strategic interviews with authorities and participants within the regional planning system in Alberta. From the application of the theoretical perspectives, it was then possible to assess the structure of the regional planning commission system as it has evolved in Alberta, and to generate some general observations related to regional planning in that province. In addition, the theories themselves were reviewed for relevance in light of the thesis research.
Molecules with ALMA at Planet-forming Scales (MAPS). VII. Sub-stellar O/H and C/H and super-stellar C/O in planet feeding gas
Creators: name: Bosman, Arthur D.
name: Alarcón, Felipe
name: Bergin, Edwin A.
name: Zhang, Ke
name: Hoff, Merel L. R. van 't
name: Öberg, Karin I.
name: Guzmán, Viviana V.
name: Walsh, Catherine
name: Aikawa, Yuri
name: Andrews, Sean M.
name: Bergner, Jennifer B.
name: Booth, Alice S.
name: Cataldi, Gianni
name: Cleeves, L. Ilsedore
name: Czekala, Ian
name: Furuya, Kenji
name: Huang, Jane
name: Ilee, John D.
name: Law, Charles J.
name: Gal, Romane Le
name: Liu, Yao
name: Long, Feng
name: Loomis, Ryan A.
name: Ménard, François
name: Nomura, Hideko
name: Qi, Chunhua
name: Schwarz, Kamber R.
name: Teague, Richard
name: Tsukagoshi, Takashi
name: Yamato, Yoshihide
name: Wilner, David J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The elemental composition of the gas and dust in a protoplanetary disk influences the compositions of the planets that form in it. We use the Molecules with ALMA at Planet-forming Scales (MAPS) data to constrain the elemental composition of the gas at the locations of potentially forming planets. The elemental abundances are inferred by comparing source-specific gas-grain thermochemical models, with variable C/O ratios and small-grain abundances, from the DALI code with CO and C2H column densities derived from the high-resolution observations of the disks of AS 209, HD 163296, and MWC 480. Elevated C/O ratios (~2.0), even within the CO ice line, are necessary to match the inferred C2H column densities, over most of the pebble disk. Combined with constraints on the CO abundances in these systems, this implies that both the O/H and C/H ratios in the gas are substellar by a factor of 4-10, with the O/H depleted by a factor of 20-50, resulting in the high C/O ratios. This necessitates that even within the CO ice line, most of the volatile carbon and oxygen is still trapped on grains in the midplane. Planets accreting gas in the gaps of the AS 209, HD 163296, and MWC 480 disks will thus acquire very little carbon and oxygen after reaching the pebble isolation mass. In the absence of atmosphere-enriching events, these planets would thus have a strongly substellar O/H and C/H and superstellar C/O atmospheric composition.
description: 19 pages, 8 figures This paper is part of the MAPS special issue of the Astrophysical Journal Supplement. Updates references for other MAPS papers
Searching Ternary Oxides and Chalcogenides as Positive Electrodes for Calcium Batteries
Creators: name: Lu, Wang
name: Wang, Juefan
name: Gautam, Gopalakrishnan Sai
name: Canepa, Pieremanuele
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The identification of alternatives to the Lithium-ion battery architecture remains a crucial priority in the diversification of energy storage technologies. Accompanied by the low reduction potential of $\mathrm{Ca^{2+}/Ca}$, -2.87 V vs. SHE, metal-anode-based rechargeable Calcium (Ca) batteries appear competitive in terms of energy densities. However, the development of Ca-batteries lacks high-energy density intercalation cathode materials. Using first-principles methodologies, we screen a large chemical space for potential Ca-based cathode chemistries, with composition of $\mathrm{Ca_iTM_jZ_k}$, where TM is a 1$^{st}$ or 2$^{nd}$ row transition metal and $\mathrm{Z}$ is oxygen, sulfur, selenium or tellurium. 10 materials are selected and their Ca intercalation properties are investigated. We identify two previously unreported promising electrode compositions: the post-spinel $\mathrm{CaV_2O_4}$ and the layered $\mathrm{CaNb_2O_4}$, with Ca migration barriers of $\sim$654 meV and $\sim$785 meV, respectively. Finally, we analyse the geometrical features of the Ca migration pathways across the 10 materials studied and provide an updated set of design rules for the identification of good ionic conductors, especially with large mobile cations.
description: 5 figures
Proteinania Hampson 1905
Creators: name: Lafontaine, Donald
name: Ferris, Clifford
name: Walsh, J.
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Lepidoptera
Noctuidae
Proteinania

description: Proteinania Hampson, 1905, syn. n. Type species: Chloridea vigasia Schaus, 1894, by original designation.
description: Published as part of Lafontaine, Donald, Ferris, Clifford & Walsh, J., 2010, A revision of the genus Hypotrix Guenee in North America with descriptions of four new species and a new genus (Lepidoptera, Noctuidae, Noctuinae, Eriopygini), pp. 225-253 in ZooKeys 39 (39) on page 228, DOI: 10.3897/zookeys.39.438, http://zenodo.org/record/576643
description: {"references": ["Hampson GF (1905) Hadeninae. Catalogue of the Phalaenae Lepidoptera in the British Museum Volume 5, 634 pp.", "Schaus W (1894) New species of Noctuidae from tropical America. Transactions of the American Entomological Society 21: 223 - 244."]}
Contact mechanics of fractal surfaces by spline assisted discretisation
Creators: name: Hanaor, Dorian
name: Gan, Yixiang
name: Einav, Itai
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Other Condensed Matter (cond-mat.other)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: We present a newly developed approach for the calculation of interfacial stiffness and contact area evolution between two rough bodies exhibiting self affine surface structures. Using spline assisted discretization to define localised contact normals and surface curvatures we interpret the mechanics of simulated non-adhesive elastic surface-profiles subjected to normal loading by examining discrete contact points as projected Hertzian spheres. The analysis of rough-to-rough contact mechanics for surface profiles exhibiting fractal structures, with fractal dimensions in the regime 1 2, reveals the significant effect of surface fractality on contact mechanics and compliance with surfaces having the same mean roughness but higher fractality showing lower contact stiffness in conditions of initial contact for a given load. The predicted linear development of true contact area with load was found to be consistent with diverse existing numerical and experimental studies. Results from this model demonstrate the applicability of the developed method for the meaningful contact analysis of hierarchical structures with implications for modelling tribological interactions between pairs of rough surfaces
Anbau von Weissen Lupinen - Kältetolerante Eiweissfrucht mit ökologischem Plus
Creators: name: Arncken, Christine
name: Klaiss, Matthias
name: Wendling, Marina
name: Messmer, Monika
Publisher: name: Zenodo
Year: 2020
Subjects: Lupin
Lupine
Legumes
Leguminosen

description: Weisse Lupinen (Lupinus albus) sind eine andere botanische Art als schmalblättrige oder „blaue“ Lupinen (Lupinus angustifolius). Sie vertragen schwerere Böden und haben ein höheres Ertragspotential, reifen allerdings erst im August/September. Wichtig für ihren Anbau ist die Verwendung von gesundem, zertifizierten Saatgut, eine möglichst frühe Aussaat und die richtige Sortenwahl, um eine Infektion mit der Pilzkrankheit Anthraknose, die über das Saatgut verbreitet wird, zu vermeiden. In diesem Legumes Translated-Merkblatt werden die wichtigsten Erfahrungen aus dem ökologischen Anbau zusammengefasst.
The current status of child study centres in degree granting institutions in Canada
Creators: name: Coates, Dona Mae
Publisher: name: University of British Columbia
Year: 2010

description: This study is designed to identify and describe child study centres operated by Canadian degree-granting institutions in 1978. The implications of the results are relevant to the efforts of those who are engaged in studying young children, those who are applying knowledge to the development of programs and practices and those who are providing guidance to parents and workers who interact with children day-to-day. Child study centres were identified by an enquiry mailed to administrators in the fifty degree-granting institutions in Canada. Twenty institutions were found to operate child study centres as defined for this investigation. Information describing the child study centres was gathered by means of a survey questionnaire mailed to each of the twenty persons named by their administrator. This included basic descriptions of the centres and information about aspects of the children's programs, faculty responsibility for and involvement with the centres, relative importance of the functions performed by the centres, policy making, supports and comment on the centres' impact on their communities. The study shows that more than two thirds of the child study centres have been established within the past ten years, confirmation of suggestions in the literature that child study has mushroomed in recent years. Most centres operate programs for preschool children, placing them in the tradition of laboratory preschools. Most are engaged in the preparation of teachers, whether they are under the auspices of a faculty of education or some other faculty or department. All, however, place emphasis on at least two of the four main functional areas examined: research, teacher preparation, dissemination of child-related knowledge, and service. More than one-third of centres do not have sufficient financial support to carry out present goals. Respondents from most centres express a desire to communicate with other centres across Canada, naming topics of common concern. Listed in the study is a catalogue of child study centres, many of which had been invisible in the literature. Such a list can enable communication to take place among them. Further investigation will be required to examine the extensive involvement with child study and children's programs taking place on Canadian campuses and whether the effectiveness of new knowledge is being tested by its application to children in typical life situations. It is suggested that diverse sources of funding and communication and cooperation among centres will be required if the potential of child study centres as powerful resources for the translation of knowledge into practice is to be achieved.
title: Front Matter, Table of Contents, Preface, List of Authors
Creators: name: Schwartz, Russell
name: Reinert, Knut
Publisher: name: Schloss Dagstuhl – Leibniz-Zentrum für Informatik
Year: 2017
Subjects: subject: Front Matter
subject: Table of Contents
subject: Preface
subject: List of Authors

description: Front Matter, Table of Contents, Preface, List of Authors
description: LIPIcs, Vol. 88, 17th International Workshop on Algorithms in Bioinformatics (WABI 2017), pages 0:i-0:xiv
Photoionization of a strongly polarizable target
Creators: name: Korol, A. V.
name: Solov'yov, A. V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We demonstrate that the angular distribution of photoelectrons from a strongly polarizable target exposed to a laser field can deviate noticeably from the prediction of conventional theory. Even within the dipole-photon approximation the profile of distribution is modified due to the action of the field of alternating dipole moment induced at the residue by the laser field. This effect, being quite sensitive to the dynamic polarizability of the residue and to its geometry, depends also on the intensity and frequency of the laser field. Numerical results, presented for sodium cluster anions, demonstrate that dramatic changes to the profile occur for the photon energies in vicinities of the plasmon resonances, where the effect is enhanced due to the increase in the residue polarizability. Strong modifications of the characteristics of a single-photon ionization process can be achieved by applying laser fields of comparatively low intensities $I_0 \sim10^{10}-10^{11}$ W/cm$^2$.
description: 19 pages, 5 figures, IOP style, submitted to JPB
A large sample of low surface brightness disk galaxies from the SDSS. I: The sample and the stellar populations
Creators: name: Zhong, G. H.
name: Liang, Y. C.
name: Liu, F. S.
name: Hammer, F.
name: Hu, J. Y.
name: Chen, X. Y.
name: Deng, L. C.
name: Zhang, B.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the properties of a large sample (12,282) of nearly face-on low surface brightness (LSB) disk galaxies selected from the main galaxy sample of SDSS-DR4. These properties include B-band central surface brightness mu_0(B), scale lengths h, integrated magnitudes, colors, and distances D. This sample has mu_0(B) values from 22 to 24.5 mag arcsec^{-2} with a median value of 22.42 mag arcsec^{-2}, and disk scale lengths ranging from 2 to 19 kpc. They are quite bright with M_B taking values from -18 to -23 mag with a median value of -20.08 mag. There exist clear correlations between logh and M_B, logh and logD, logD and M_B. However, no obvious correlations are found between mu_0(B) and logh, colors etc. The correlation between colors and logh is weak even though it exists. Both the optical-optical and optical-NIR color-color diagrams indicate that most of them have a mixture of young and old stellar populations. They also satisfy color-magnitude relations, which indicate that brighter galaxies tend generally to be redder. The comparison between the LSBGs and a control sample of nearly face-on disk galaxies with higher surface brightness (HSB) with mu_0(B) from 18.5 to 22 mag arcsec^{-2} show that, at a given luminosity or distance, the observed LSB galaxies tend to have larger scale lengths. These trends could be seen gradually by dividing both the LSBGs and HSBGs into two sub-groups according to surface brightness. A volume-limited sub-sample was extracted to check the incompleteness of surface brightness. The only one of the property relations having an obvious change is the relation of logh versus mu_0(B), which shows a correlation in this sub-sample.
description: 14 pages, 18 figures, accepted for publication in MNRAS
On the relationship between BL Lacertae objects and radio galaxies
Creators: name: Landt, Hermine
name: Bignall, Hayley E.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present deep radio images at 1.4 GHz of a large and complete sample of BL Lacertae objects (BL Lacs) selected from the Deep X-ray Radio Blazar Survey (DXRBS). We have observed 24 northern sources with the Very Large Array (VLA) in both its A and C configurations and 15 southern sources with the Australia Telescope Compact Array (ATCA) in its largest configuration. We find that in the DXRBS, as in the 1-Jy survey, which has a radio flux limit roughly ten times higher than the DXRBS, a considerable number (about a third) of BL Lacs can be identified with the relativistically beamed counterparts of Fanaroff-Riley type II (FR II) radio galaxies. We attribute the existence of FR II-BL Lacs, which is not accounted for by current unified schemes, to an inconsistency in our classification scheme for radio-loud active galactic nuclei (AGN). Taking the extended radio power as a suitable measure of intrinsic jet power, we find similar average values for low- (LBL) and high-energy peaked BL Lacs (HBL), contrary to the predictions of the blazar sequence.
description: 21 pages, 10 figures, accepted by MNRAS
Interview with Dr. Hui Ma and Prof. Tapan Saha - Online Partial Discharge (PD) Monitoring and Diagnosis of High Voltage (HV) Apparatus
Creators: Hui Ma
Tapan Saha
Publisher: name: IEEE
Year: 2016

Interviews
In this interview, Dr. Ma and Prof. Tapan Saha answer questions regarding their IEEE Smart Grid webinar entitled, "Online Partial Discharge (PD) Monitoring and Diagnosis of High Voltage (HV) Apparatus".
Magnification Bias Corrections to Galaxy-Lensing Cross-Correlations
Creators: name: Ziour, R.
name: Hui, L.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Galaxy-galaxy or galaxy-quasar lensing can provide important information on the mass distribution in the Universe. It consists of correlating the lensing signal (either shear or magnification) of a background galaxy/quasar sample with the number density of a foreground galaxy sample. However, the foreground galaxy density is inevitably altered by the magnification bias due to the mass between the foreground and the observer, leading to a correction to the observed galaxy-lensing signal. The aim of this paper is to quantify this correction. The single most important determining factor is the foreground redshift z: the correction is small if the foreground galaxies are at low redshifts but can become non-negligible for sufficiently high redshifts. For instance, we find that for the multipole l=1000, the correction is above 1%*(5s-2)/b for z<0.37, and above 5%*(5s-2)/b for z<0.67, where s is the number count slope of the foreground sample, and b its galaxy bias. These considerations are particularly important for geometrical measures, such as the Jain and Taylor ratio or its generalization by Zhang et al. Assuming (5s-2)/b=1, we find that the foreground redshift should be limited to z<0.45 in order to avoid biasing the inferred dark energy equation of state w by more than 5%, and that even for a low foreground redshift (< 0.45), the background samples must be well separated from the foreground to avoid incurring a bias of similar magnitude. Lastly, we briefly comment on the possibility of obtaining these geometrical measures without using galaxy shapes, using instead magnification bias itself.
description: 10 pages, 7 figures; v2: minor revisions, as accepted for publication in Physical Review D
Macroscopic elastic stress and strain produced by irradiation
Creators: name: Reali, Luca
name: Boleininger, Max
name: Gilbert, Mark R.
name: Dudarev, Sergei L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Using the notion of eigenstrain produced by the defects formed in a material exposed to high energy neutron irradiation, we develop a method for computing macroscopic elastic stress and strain arising in components of a fusion power plant during operation. In a microstructurally isotropic material, the primary cause of macroscopic elastic stress and strain fields is the spatial variation of neutron exposure. We show that under traction-free boundary conditions, the volume-average elastic stress always vanishes, signifying the formation of a spatially heterogeneous stress state, combining compressive and tensile elastic deformations at different locations in the same component, and resulting solely from the spatial variation of radiation exposure. Several case studies pertinent to the design of a fusion power plant are analysed analytically and numerically, showing that a spatially varying distribution of defects produces significant elastic stresses in ion-irradiated thin films, pressurised cylindrical tubes and breeding blanket modules.
description: To be published in Nuclear Fusion
GEOMETRIYA FANIDAN AMALIY MASHGʻULOTLARDA TALABALAR MAKTABDA AKADEMIK LITSEY VA KASB-HUNAR KOLLEJLARDA OʻRGANMAGAN MAVZULARINI CHUQURROQ VA TADBIQIY MASALALARNING OʻQITILISHI
Creators: name: Zaxiriddinova, Shahlo
name: Murodulloyeva, Jasmina
name: Nurmaxmatova, Umida
Publisher: name: Zenodo
Year: 2025

description: Ushbu maqola geometriya fanini o‘qitishda amaliy mashg‘ulotlarning o‘rni va ahamiyatini, xususan, maktab, akademik litsey va kasb-hunar kollejlarida standart dasturlar doirasida yetarlicha yoritilmaydigan mavzularni chuqurroq o‘rganish imkoniyatlarini tahlil qiladi. Tadqiqotda talabalarning nazariy bilimlarini real hayotiy muammolar yechimiga tatbiq etish ko‘nikmalarini rivojlantirishga qaratilgan metodik yondashuvlar va ilmiy asoslangan pedagogik strategiyalar muhokama qilinadi. Maqolada, shuningdek, geometriyaning murakkab bo‘limlari – masalan, proyeksion geometriya, affin va evklid bo‘lmagan geometriya kabi sohalar – bo‘yicha tadbiqiy masalalarning o‘quv jarayoniga integratsiyalashuvi va bu jarayonning talabalarning mantiqiy fikrlash hamda muhandislik dizaynidagi muammolarni hal qilish qobiliyatlariga ta’siri ko‘rib chiqiladi. Ilmiy yondashuv sifatida empirik ma’lumotlar, statistik tahlillar va xalqaro tajribalar misolida zamonaviy ta’lim standartlariga mos keladigan yangicha o‘qitish modelining samaradorligi isbotlanadi.
Degree-one maps, surgery and four-manifolds
Creators: name: Gadgil, Siddhartha
Publisher: name: arXiv
Year: 2008
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57N10; 57N13, 57M27

description: We give a description of degree-one maps between closed, oriented 3-manifolds in terms of surgery. Namely, we show that there is a degree-one map from a closed, oriented 3-manifold $M$ to a closed, oriented 3-manifold $N$ if and only if $M$ can be obtained from $N$ by surgery about a link in $N$ each of whose components is an unknot. We use this to interpret the existence of degree-one maps between closed 3-manifolds in terms of smooth 4-manifolds. More precisely, we show that there is a degree-one map from $M$ to $N$ if and only if there is a smooth embedding of $M$ in $W=(N\times I)#_n \bar{\C P^2}#_m {\C P^2}$, for some $m\geq 0$, $n\geq 0$ which separates the boundary components of $W$. This is motivated by the relation to topological field theories, in particular the invariants of Ozsvath and Szabo.
description: 11 pages
Lattice Boltzmann method for fluid-structure interaction in compressible flow
Creators: name: Bhadauria, Abhimanyu
name: Dorschner, Benedikt
name: Karlin, Ilya
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We present a two-way coupled fluid-structure interaction scheme for rigid bodies using a two-population lattice Boltzmann formulation for compressible flows. Arbitrary Lagrangian-Eulerian formulation of the discrete Boltzmann equation on body-fitted meshes is used in a combination with polynomial blending functions. The blending function approach localizes mesh deformation and allows treating multiple moving bodies with a minimal computational overhead. We validate the model with several test cases of vortex induced vibrations of single and tandem cylinders and show that it can accurately describe dynamic behavior of these systems. Finally, in the fully compressible regime, we demonstrate that the proposed model accurately captures complex phenomena such as transonic flutter over an airfoil.
Towards the linguistic history of Rangi and Mbugwe
Creators: name: Mous, Maarten
Publisher: name: Zenodo
Year: 2021
Subjects: Languages of Tanzania
Tanzanian Rift Valley Area
Rangi
Mbugwe
Bantu

description: Note: This talk has not gone through a process of peer review, and findings should therefore be treated as preliminary and subject to change. How to cite: Mous, Maarten. 2021. Towards the linguistic history of Rangi and Mbugwe. Talk Given at Rift Valley Webinar Series 27/01/2021. DOI: https://doi.org/10.5281/zenodo.4498156 Abstract: This seminar is actually the beginning of my research into this topic and will present questions, considerations, and ideas of what to look into. I need to understand more about the linguistic history of these two languages in order to form a view on the linguistic history of the Tanzanian Rift valley as a contact zone. My assumption is that Rangi and Mbugwe are closely related and form one genetic unit but the main research question is whether they are part of a genetic subgroup F30; are they genetically related to Nyaturu, Nyilamba and Ihanzu or is the resemblance through contact? And there is a need to explain the properties that Rangi and Mbugwe share with Pare and Chasu (Masele & Nurse 2003). I do not expect to answer this question but to lay out the problem and sketch how to go about it. In addition to these fundamental questions, I need to know more of all the various language contact phenomena with the languages in the area and across different periods of time, and an inventory of specific research questions to achieve this.
Mid-Infrared Drift Scanning Up The SNR Slope
Creators: name: Packham, Christopher
name: Torres-Quijano, Amílcar R.
name: Acosta, Sergio Fernandez
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Mid-infrared (MIR) observations are typically accomplished from the ground through oscillating the secondary mirror a few times a second. This chopping serves to remove the fast time variable components of (a) sky variation and (b) array background. However, there is a significant price to pay for this, including reduced on-object photon collection time, stringent demands on the secondary mirror, nodding the telescope to remove the radiative offset imprinted by the chopping, and an often-fixed chop-frequency regardless of the sky conditions in the actual observations. Worse, in the era of 30m telescopes it is wholly impracticable to chop the secondary mirror. If the array is stable enough, drift scanning holds the promise to remove the necessity of chopping. In this paper we report our experiments using the CanariCam MIR instrument on the 10.4m GranTeCan and the implications to future instruments and experiments.
description: 12 pages, 10 figures
Isospin phases of vertically coupled double quantum rings under the influence of perpendicular magnetic fields
Creators: name: Royo, M.
name: Malet, F.
name: Barranco, M.
name: Pi, M.
name: Planelles, J.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Vertically coupled double quantum rings submitted to a perpendicular magnetic field $B$ are addressed within the local spin-density functional theory. We describe the structure of quantum ring molecules containing up to 40 electrons considering different inter-ring distances and intensities of the applied magnetic field. When the rings are quantum mechanically strongly coupled, only bonding states are occupied and the addition spectrum of the artificial molecules resembles that of a single quantum ring, with some small differences appearing as an effect of the magnetic field. Despite the latter has the tendency to flatten the spectra, in the strong coupling limit some clear peaks are still found even when $B\neq 0$ that can be interpretated from the single-particle energy levels analogously as at zero applied field, namely in terms of closed-shell and Hund's-rule configurations. Increasing the inter-ring distance, the occupation of the first antibonding orbitals washes out such structures and the addition spectra become flatter and irregular. In the weak coupling regime, numerous isospin oscillations are found as a function of $B$.
description: 27 pages, 11 figures. To be published in Phys. Rev. B
A panoramic view of the circumgalactic medium in the photoionized precipitation model
Creators: name: Roy, Manami
name: Nath, Biman B.
name: Voit, G. M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We consider a model of the circumgalactic medium (CGM) in which feedback maintains a constant ratio of cooling time to freefall time throughout the halo, so that the entire CGM is marginally unstable to multiphase condensation. This 'precipitation model' is motivated by observations of multiphase gas in the cores of galaxy clusters and the halos of massive ellipticals. We derive from the model density and temperature profiles for the CGM around galaxies with masses similar to the Milky Way. After taking into consideration the geometrical position of our solar system in the Milky Way, we show that the CGM model is consistent with observed OVI, OVII, and OVIII column densities only if temperature fluctuations with a log-normal dispersion $σ_{\ln T} \sim 0.6$-$1.0$ are included. We show that OVI column densities observed around star-forming galaxies require systematically greater values of $σ_{\ln T}$ than around passive galaxies, implying a connection between star formation in the disk and the state of the CGM. Photoionization by an extra-galactic UV background does not significantly change these CGM features for galaxies like the Milky Way but has much greater and significant effects on the CGM of lower-mass galaxies.
description: 12 pages, 10 figures, 1 table, Accepted for publication in MNRAS
Interview with Abedalsalam (Salam) Baniahmed- "Cyber Resiliency & Incident Management for Critical Energy Infrastructure"
Creators: Abedalsalam (Salam) Baniahmed
Publisher: name: IEEE
Year: 2019

Interviews
In this interview, Abedalsalam (Salam) Baniahmed answers questions from his webinar "Cyber Resiliency & Incident Management for Critical Energy Infrastructure"
T-entropy and Variational principle for the spectral radius of weighted shift operators
Creators: name: Bakhtin, V. I.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Dynamical Systems (math.DS)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 37A35, 47B37

description: In this paper we introduce a new functional invariant of discrete time dynamical systems -- the so-called t-entropy. The main result is that this t-entropy is the Legendre dual functional to the logarithm of the spectral radius of the weighted shift operator on $L^1(X,m)$ generated by the dynamical system. This result is called the Variational principle and is similar to the classical variational principle for the topological pressure.
description: 12 pages, v.2: editorial corrections
The Hunt for Pevatrons: The Case of Supernova Remnants
Creators: name: Cristofari, P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The search for Galactic pevatrons is now a well-identified key science project of all instruments operating in the very-high-energy domain. Indeed, in this energy range, the detection of gamma rays clearly indicates that efficient particle acceleration is taking place, and observations can thus help identify which astrophysical sources can energize particles up to the $\sim$PeV range, thus being $pevatrons$. In the search for the origin of Galactic cosmic rays (CRs), the PeV range is an important milestone, since the sources of Galactic CRs are expected to accelerate PeV particles. This is how the central scientific goal that is 'solving the mystery of the origin of CRs' has often been distorted into 'finding (a) pevatron(s)'. Since supernova remnants (SNRs) are often cited as the most likely candidates for the origin of CRs, 'finding (a) pevatron(s)' has often become 'confirming that SNRs are pevatrons'. Pleasingly, the first detection(s) of pevatron(s) were not associated to SNRs. Moreover, all clearly detected SNRs have yet revealed to not be pevatrons, and the detection from VHE gamma rays from regions unassociated with SNRs, are reminding us that other astrophysical sites might well be pevatrons. This short review aims at highlighting a few important results on the search for Galactic pevatrons.
description: Accepted for publication in the Special Issue "High-Energy Gamma-Ray Astronomy: Results on Fundamental Questions after 30 Years of Ground-Based Observations" Universe MDPI
Interview with Dr. Lucia Gauchia - Energy Storage
Creators: Dr. Lucia Gauchia
Publisher: name: IEEE
Year: 2015

Interviews
In this interview, Dr. Lucia Gauchia answers questions regarding a system level approach to energy storage that is particularly useful for grid applications. During Dr. Lucia Gauchias IEEE Smart Grid webinar, she reviewed the different technologies, and what opportunities and challenges consumers at all levels in all markets face.
Charge order dynamics in underdoped La$\mathbf{_{1.6-\textit{x}}}$Nd$\mathbf{_{0.4}}$Sr$\mathbf{_\textit{x}}$CuO$\mathbf{_{4}}$ revealed by electric pulses
Creators: name: Pokharel, Bal K.
name: Wang, Yuxin
name: Jaroszynski, J.
name: Sasagawa, T.
name: Popović, Dragana
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: The dynamics of the charge-order domains has been investigated in La$_{1.48}$Nd$_{0.4}$Sr$_{0.12}$CuO$_{4}$, a prototypical stripe-ordered cuprate, using pulsed current injection. We first identify the regime in which nonthermal effects dominate over simple Joule heating, and then demonstrate that, for small enough perturbation, pulsed current injection allows access to nonthermally-induced resistive metastable states. The results are consistent with pinning of the fluctuating charge order, with fluctuations being most pronounced at the charge-order onset temperature. The nonequilibrium effects are revealed only when the transition is approached from the charge-ordered phase. Our experiment establishes pulsed current injection as a viable and effective method for probing the charge-order dynamics in various other materials.
description: This article has been submitted to Applied Physics Letters. After it is published, it will be found at their website (see also https://publishing.aip.org/resources/librarians/products/journals/)
The expansion field: The value of H_0
Creators: name: Tammann, G. A.
name: Sandage, A.
name: Reindl, B.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Any calibration of the present value of the Hubble constant requires recession velocities and distances of galaxies. While the conversion of observed velocities into true recession velocities has only a small effect on the result, the derivation of unbiased distances which rest on a solid zero point and cover a useful range of about 4-30 Mpc is crucial. A list of 279 such galaxy distances within v<2000 km/s is given which are derived from the tip of the red-giant branch (TRGB), from Cepheids, and from supernovae of type Ia (SNe Ia). Their random errors are not more than 0.15 mag as shown by intercomparison. They trace a linear expansion field within narrow margins from v=250 to at least 2000 km/s. Additional 62 distant SNe Ia confirm the linearity to at least 20,000 km/s. The dispersion about the Hubble line is dominated by random peculiar velocities, amounting locally to <100 km/s but increasing outwards. Due to the linearity of the expansion field the Hubble constant H_0 can be found at any distance >4.5 Mpc. RR Lyr star-calibrated TRGB distances of 78 galaxies above this limit give H_0=63.0+/-1.6 at an effective distance of 6 Mpc. They compensate the effect of peculiar motions by their large number. Support for this result comes from 28 independently calibrated Cepheids that give H_0=63.4+/-1.7 at 15 Mpc. This agrees also with the large-scale value of H_0=61.2+/-0.5 from the distant, Cepheid-calibrated SNe Ia. A mean value of H_0=62.3+/-1.3 is adopted. Because the value depends on two independent zero points of the distance scale its systematic error is estimated to be 6%. Typical errors of H_0 come from the use of a universal, yet unjustified P-L relation of Cepheids, the neglect of selection bias in magnitude-limited samples, or they are inherent to the adopted models.
description: 44 pages, 4 figures, 6 tables, accepted for publication in the Astronony and Astrophysics Review 159
Incompressibility and Least-Area surfaces
Creators: name: Gadgil, Siddhartha
Publisher: name: arXiv
Year: 2008
Subjects: subject: Geometric Topology (math.GT)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 57N10; 53A10

description: We show that if $F$ is a smooth, closed, orientable surface embedded in a closed, orientable 3-manifold $M$ such that for each Riemannian metric $g$ on $M$, $F$ is isotopic to a least-area surface $F(g)$, then $F$ is incompressible.
description: 6 pages
Carbon dioxide clathrate hydrate formation at low temperature. Diffusion-limited kinetics growth as monitored by FTIR
Creators: name: Dartois, Emmanuel
name: Langlet, François
Publisher: name: arXiv
Year: 2021
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The formation and presence of clathrate hydrates could influence the composition and stability of planetary ices and comets; they are at the heart of the development of numerous complex planetary models, all of which include the necessary condition imposed by their stability curves, some of which include the cage occupancy or host-guest content and the hydration number, but fewer take into account the kinetics aspects. We measure the temperature-dependent-diffusion-controlled formation of the carbon dioxide clathrate hydrate in the 155-210~K range in order to establish the clathrate formation kinetics at low temperature. We exposed thin water ice films of a few microns in thickness deposited in a dedicated infrared transmitting closed cell to gaseous carbon dioxide maintained at a pressure of a few times the pressure at which carbon dioxide clathrate hydrate is thermodynamically stable. The time dependence of the clathrate formation was monitored with the recording of specific infrared vibrational modes of CO2 with a Fourier Transform InfraRed (FTIR) spectrometer. These experiments clearly show a two-step clathrate formation, particularly at low temperature, within a relatively simple geometric configuration. We satisfactorily applied a model combining surface clathration followed by a bulk diffusion-relaxation growth process to the experiments and derived the temperature-dependent-diffusion coefficient for the bulk spreading of clathrate. The derived apparent activation energy corresponding to this temperature-dependent-diffusion coefficient in the considered temperature range is E_a = 24.7 +/- 9.7 kJ/mol. The kinetics parameters favour a possible carbon dioxide clathrate hydrate nucleation mainly in planets or satellites.
Influence of structural deformations on the reentrant conductance feature in semiconducting nanowires
Creators: name: Cunha, Iann
name: Villegas-Lelovsky, Leonardo
name: Castelano, Leonardo Kleber
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Helical states can be measured through the observation of the reentrant behaviour, which is a dip in the conductance probed in semiconducting nanowires (NWs) with strong spin-orbit coupling (SOC) under the presence of an external perpendicular magnetic field. We investigate the effects of deformations in the electronic transport in NWs considering the coupling between different transverse modes. Within this approach, we show that the dip in the conductance of a NW is affected by the presence of a local constriction. Moreover, we find that the reentrant feature in the conductance can appear in NWs with a local expansion of its radius, even in the absence of SOC and magnetic field. Furthermore, we develop a numerical approach to calculate transport properties, which is able to include the deformation and the coupling among several scattering channels.
description: 9 pages, 13 figures
An inquiry into colonial disengagement : the cabinet delegation to India, March to June, 1946
Creators: name: Bajpai, Kanti Prasad
Publisher: name: University of British Columbia
Year: 2010

description: This thesis is about colonial disengagement, a term signifying the process of decolonisation from the decision to end colonial rule to the final withdrawal of imperial officials and armed personnel. Specifically, this thesis is about British colonial disengagement as revealed in a vital case—India during the period March 1946 to August 1947. The focus is on the role of the British Government in that process, which, in the Indian case, involved the transfer of political authority—that is of ultimate responsibility for government— from imperial to nationalist hands. This occurred in two phases: the first, during the Cabinet Delegation's mission to India from March to June 1946; and the second, during Mountbatten's mission from March to August 1947. In analysing the role of the British Government, the inquiry will deal with the former phase, of which a detailed first-hand account is available in "The Transfer of Power" archival documents recently released by the British Government pertaining to the period 1942-1947. The documents are used extensively in the analysis. The attempt is made to explain the role of the British Government in terms of the interaction and impact of five factors: (i) British interests; (ii) British obligations; (iii) the desire for a peaceful and orderly transfer of authority; (iv) the momentum of constitutional change; and (v) declining British power in the face of the increasingly powerful and polarised nationalist movement. On the basis of the evidence collected primarily, from the documents, but also from important secondary sources, it is argued that while each of these factors had an impact on how Britain disengaged, three factors in particular were most significant: British strategic interests, the desire for a peaceful and orderly transfer of authority and the lack of British power in relation to the nationalist movement. These three factors, it is further argued, interacted to cause the government to pursue a disengagement plan that would elicit the agreement of the two major nationalist parties—the Indian National Congress and the Muslim League—and that this pursuit, in turn, seriously limited its room for manoeuvre in the process of transferring authority. It is shown, finally, that the lack of room for manoeuvre was partly inherent in the Indian political situation and partly in British objectives, and that the Congress and the League were equally constrained by similar factors. Thus, in the end, it is concluded that to the extent that the Indian case is paradigmatic of British disengagements generally a more pessimistic view of what accommodations and political arrangements the departing imperial administrations and nationalist movements can or cannot make during the process of transferring authority may be necessary.
title: Arrivals in Rome : entangling and disorientating the city in contemporary art and text
Creators: name: Crabtree, Eleanor
Publisher: name: University of St Andrews
Year: 2020

description: This thesis explores heterogeneous forms of trans-national arrival in Rome as they are encapsulated by contemporary creative practices. The arrivals include those of ‘first’ and ‘second’ generation migrant writers (Methnani, Garane, Scego, Ali Farah, Lakhous) and those of non-Italian artists invited to carry out work in the city (Kentridge, Weems, FischerelSani). The final chapter explores how more local border-crossing positionalities from the city’s peripheries, as encapsulated by the street art movement Pinacci Nostri, intersect with these other arrivals. By foregrounding contemporary and historical trans- national trajectories to and from Rome, the creative practices discussed entangle the city with a far more expansive geography than traditional Western conceptualisations of space and time suggest. In their definition of eurocentrism, Shohat and Stam pinpoint Rome as an important reference point for such conceptualisations emerging from the ‘normal view of history’ which projects a ‘linear historical trajectory’ leading from Ancient Greece, via Rome, to the West (Unthinking Eurocentrism, pp. 1–2). Interpretations of Rome in contemporary creative practices demonstrate the difficulties in the contemporary age of thinking spatialities (and the histories from which they emerge) as contained within national borders, or even within ‘direct’ colonial relations. Exploring how each of the creative practices in some way reveals a concern for the legacy of the Ancient Roman Empire against the backdrop of the postcolonial present, this thesis shows how Rome may contribute as an important reference point for developing theories capable of describing the trans-national present. While analysing how creative practices offer readers/viewers ideas about Rome that go against eurocentric ways of thinking space and history, this thesis identifies the qualities of creative expression which facilitate this agency. Turning attention to questions of trans-national positionality and cultural agency also entails critically reflecting on the role of the Modern Languages researcher in exploring such a phenomenon. By drawing on writing methodologies that foreground the researcher in the first person, this thesis experiments with how this subjective positionality can itself serve as a vital theoretical tool to further enquiry.