cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
New experimental techniques for studying : (i) trace element substitution in minerals, and (ii) determining S-L-V relationships in silicate-H2O systems at high pressure
Creators: name: Tailby, Nicholas David
Publisher: name: The Australian National University
Year: 2009
Subjects: subject: QE516.T6 T35 2009
subject: Trace elements Analysis
subject: Titanium
subject: Silicon
subject: Zircon
subject: Analytical geochemistry

description: Ti site occupancy in zircon (ZrSiO{u2074}) is fundamental to thermobarometry because substitution mechanisms control Ti content-temperature relations. Described here are the results of three independent methods used to demonstrate that Ti predominately substitutes for Si and not Zr in zircon. Zircons were synthesized from oxide powders held in a Na{u2082}WO{u2084} flux at 1 bar and 1,100-1,400 {u00B0}C. Fully buffered experiments run at 1,300 {u00B0}C show zircons equilibrated with rutile + cristobalite have Ti contents (1201 ppm) nearly half that of zircons equilibrated with srilankite + tetragonal zirconia (2640 ppm). The lower Ti content of zircons produced under silica-saturated conditions indicates that Ti substitution predominately occurs on the Si site. Moreover, the higher Ti contents of silica-saturated experiments at 1 bar (1201 ppm), relative to those at 10 kbar (457 ppm, Ferry and Watson, 2007), indicate a substantial pressure effect on Ti solubility in zircon (correcting for different silica species present). Measured Ti K-a edge X-ray Absorption Near Edge Structure (XANES) spectra of synthetic zircons show energies and normalized intensities akin to those seen among tetrahedrally coordinated Ti-bearing standard minerals, strongly suggesting that Ti occupies the Si site. Density functional theory (DFT) calculations confirm that Ti substitution is most likely to occur on the Si site and predict a Ti-O bond length of 1.797 {u00C5} (compared to an average of 2.160 A for substitution on the Zr site), in excellent agreement with X-ray Absorption Fine Structure (EXAFS) spectra of experimentally grown zircons which indicate a value of 1.76(1) {u00C5}. The software FEFF8.4 was used to simulate XANES spectra from the defect structures determined by OFT for Ti substituting on both the Si and Zr sites. The predicted spectrum for Ti on the Si site reproduces all the key features of the experimental zircon spectra, whereas Ti on the Zr site is markedly different. All applied methods confirm that Ti predominately substitutes for Si in zircon. Consequently, the Ti content of zircon is not only a function of temperature, but increases with decreasing silica activity. Because elements that activate or quench cathodoluminescence (CL) in zircon are incorporated into the Zr site, a decoupling of CL signal and Ti distribution (which occurs on the Si site in zircon) is expected. This hypothesis has been verified by a systematic CL-trace element study of natural and experimental zircon.
A unified matrix representation for spin and orbital angular momentum in partially coherent beams
Creators: name: Korotkova, Olga
name: Gbur, Greg
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: A matrix representation is introduced for stationary beam-like light fields that allows for simultaneous treatment of the orbital angular momentum (OAM) and the second-order state of spatial coherence. This Coherence-OAM matrix is a counterpart of the 2 x 2 beam Coherence-polarization matrix in a Cartesian polarization basis or Coherence-spin angular momentum (SAM) matrix in a circular polarization basis. The general properties of the Coherence-OAM matrix are discussed and then the Coherence-SAM-OAM matrix is introduced as a unifying entity for treating beams with any coherence, spin and orbital angular momentum states.
description: 14 pages, 3 figures
Connectivity of the space of ending laminations
Creators: name: Leininger, Christopher J.
name: Schleimer, Saul
Publisher: name: arXiv
Year: 2008
Subjects: subject: Geometric Topology (math.GT)
subject: Group Theory (math.GR)
subject: FOS: Mathematics

description: We prove that for any closed surface of genus at least four, and any punctured surface of genus at least two, the space of ending laminations is connected. A theorem of E. Klarreich implies that this space is homeomorphic to the Gromov boundary of the complex of curves. It follows that the boundary of the complex of curves is connected in these cases, answering the conjecture of P. Storm. Other applications include the rigidity of the complex of curves and connectivity of spaces of degenerate Kleinian groups.
description: v2. 38 pages, 6 figures
Elicitation on have-constructions and adverbial clauses; Phrasebook editing: "going places" through "finding transportation"
Creators: name: Rudolph, Johnny (Soni)
name: Drummond, Emily
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: nkr

description: Elicitation on have-constructions (including questioning, relativizing, and embedding); manner, reason, and purpose clauses; and the editing of a Nukuoro phrasebook, including sections on going places, finding your way, and finding transportation. Corresponds to pages 88-89 in Notebook 3.
The T Tauri Phase Down to Nearly Planetary Masses: Echelle Spectra of 82 Very Low Mass Stars and Brown Dwarfs
Creators: name: Mohanty, Subhanjoy
name: Jayawardhana, Ray
name: Basri, Gibor
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Using the largest high-resolution spectroscopic sample to date of young, very low mass stars (VLMS) and brown dwarfs (BDs), we investigate disk accretion in objects ranging from just above the hydrogen-burning limit all the way to nearly planetary masses. Our 82 targets span spectral types from M5 to M9.5, or masses from 0.15 Msun down to ~15 Jupiters. They are confirmed members of the rho Oph, Taurus, Cha I, IC 348, R CrA, Upper Sco and TW Hydrae regions, with ages <1 to ~10 Myr. The sample contains 41 BDs (spectral types >= M6.5). We find that: (1) classical T Tauri-like disk-accretion persists in the BD domain down to nearly the deuterium-burning limit; (2) in addition to H-alpha, permitted emission lines of CaII, OI and HeI are also good accretion indicators, as in CTTs; (3) the CaII 8662A flux is an excellent quantitative measure of the accretion rate (Mdot) in VLMS and BDs(as in CTTs); (4) Mdot diminishes as M^2 -- our measurements support previous findings of this correlation, and extend it to the entire range of sub-stellar masses; (5) the accretor fraction among VLMS and BDs decreases substantially with age, as in higher-mass stars; (6) at any given age, the VLMS and BD accretor fraction is comparable to that in higher-mass stars; and (7) a number of sources with IR disk excesses do not evince measurable accretion, with the incidence of such a mismatch increasing with age: this implies that disks in the low mass regime can persist beyond the main accretion phase, and parallels the transition from the classical to post-T Tauri stage in more massive stars. These strong similarities at young ages, between higher-mass stars and low-mass bodies close to and below the hydrogen-burning limit, are consistent with a common formation mechanism in the two mass regimes. (abridged)
description: 64 pages, 7 figures. ApJ accepted
The RR charges of A-type Gepner models
Creators: name: Caviezel, Claudio
name: Fredenhagen, Stefan
name: Gaberdiel, Matthias R.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It is shown that the RR charges of Gepner models are not all accounted for by the usual tensor product and permutation branes. In order to characterise the missing D-branes we study the matrix factorisation approach to the description of D-branes for Gepner models. For each of the A-type models we identify a set of matrix factorisations whose charges generate the full lattice of quantised charges. The additional factorisations that are required correspond to generalised permutation branes.
description: 25 pages, comparison to results using path integrals added, minor changes in section 2, reference added
Neblinichthys Ferraris, Isbrucker & Nijssen 1986
Creators: name: Armbruster, Jonathan W.
name: Taphorn, Donald C.
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Actinopterygii
Siluriformes
Loricariidae
Neblinichthys

description: Key to the species of Neblinichthys
1a. Four or more preadipose plates; 10 or fewer elongate cheek odontodes ................................................... ........ N. roraima
1b. Three or fewer preadipose plates, 20 or more elongate cheek odontodes ................................................................... 2
2a. Abdomen with irregular gray spots and vermiculations on a dark background; no (occasionally one) odontodes on the exposed portion of the opercle; iris operculum absent, internares width 5.0-8.5% HL .............................................. 3
2b. Abdomen usually white or with dark spots or short vermiculations on a light background; 10 or more odontodes on the exposed portion of the opercle, iris operculum present; internares width 7.6-15.5% HL ......... 4
3a. Dorsal-fin base length 18.1-22.8% SL; dorsal-anal distance 13.7-18.3% SL, snout decreasing in steep arc just anterior to eyes and then flattening in area anterior of nares; adpressed dorsal fin not reaching anterior preadipose plate ...................................................................... N. brevibracchium
3b. Dorsal-fin base length 24.3-27.0% SL; dorsal-anal distance 11.9-12.5% SL, snout tapering shallowly and continuously from eyes to snout tip; adpressed dorsal fin reaching anterior preadipose plate .................................... N. echinasus
4a. Usually four anal-fin rays (one examined with five), spots on fins small dashes confined to rays; six to seven columns of spots on caudal fin ................................................. N. yaravi
4b. Five anal-fin rays; spots on fins large and round, extending onto membranes; three to five bands or columns of spots on caudal fin .......................................................................... 5
5a. Caudal peduncle with dark blotches forming mottling; head usually with spots (absent in nuptial males); rectangular blotch at base of caudal fin; nuptial males with relatively short odontodes directed largely upwards (see discussion); internares width 10.5-12.4% HL; postanal length 28.5-30.6% SL ........................................................................ N.peniculatus
5b. Caudal peduncle brown; head without spots; no rectangular blotch at base of caudal fin; nuptial males with very long odontodes directed anteriorly (see discussion); internares width 17.3-20.1% HL; postanal length 32.8-34.9% SL ................................................................................. N. pilosus
description: Published as part of Armbruster, Jonathan W. & Taphorn, Donald C., 2013, Description of Neblinichthys peniculatus, a new species of loricariid catfish from the río Paragua drainage of Venezuela, pp. 65-72 in Neotropical Ichthyology 11 (1) on pages 66-67, DOI: 10.1590/S1679-62252013000100007, http://zenodo.org/record/12652838
Fine Structure of the Radial Breathing Mode in Double-Wall Carbon Nanotubes
Creators: name: Pfeiffer, R.
name: Simon, F.
name: Kuzmany, H.
name: Popov, V. N.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The analysis of the Raman scattering cross section of the radial breathing modes of double-wall carbon nanotubes allowed to determine the optical transitions of the inner tubes. The Raman lines are found to cluster into species with similar resonance behavior. The lowest components of the clusters correspond well to SDS wrapped HiPco tubes. Each cluster represents one particular inner tube inside different outer tubes and each member of the clusters represents one well defined pair of inner and outer tubes. The number of components in one cluster increases with decreasing of the inner tube diameter and can be as high as 14.
description: 5 pages, 3 figures
Tit-for-Tat Strategy as a Deformed Zero-Determinant Strategy in Repeated Games
Creators: name: Ueda, Masahiko
Publisher: name: arXiv
Year: 2020
Subjects: subject: Combinatorics (math.CO)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We introduce the concept of deformed zero-determinant strategies in repeated games. We then show that the Tit-for-Tat strategy in the repeated prisoner's dilemma game is a deformed zero-determinant strategy, which unilaterally equalizes the probability distribution functions of payoffs of two players.
description: 2 pages
The state and market in the financial sectors of Korea, Malaysia and Thailand
Creators: name: Lai, Jikon
Publisher: name: The Australian National University
Year: 2010
Subjects: subject: HG187.K6 L35 2010
subject: Finance Korea (South)
subject: Finance Malaysia
subject: Finance Thailand
subject: Financial crises Korea (South)
subject: Financial crises Malaysia
subject: Financial crises Thailand
subject: Korea (South) Politics and government
subject: Malaysia Politics and government
subject: Thailand Politics and government

description: In the aftermath of the Asian financial crisis of 1997, many expected the crisis affected countries to reform and restructure their financial systems. In particular, in light of the criticisms about corruption, cronyism, and the weaknesses of the state-business nexus in East Asia, and given the nature of the contemporary global financial system, it was argued that the crisis-stricken economies should become more market-driven. As such, there was an expectation, at least in some quarters, that the Asian economies would adopt features that conformed more closely with a liberal market model. Has this been the case? If indeed forms of state-business relations have material impact on the nature and potential of economic development and growth, as many contend, then it is important to investigate how such relations have changed in the aftermath ofthe Asian financial crisis. This thesis examines the proposition, given the lessons 'learned' from the severe effects of the crisis, that the East Asian economies would converge onto the liberal market model by studying the evolution of the financial sectors of Korea, Malaysia and Thailand in the decade since 1997. It adopts the 'varieties of capitalism' framework to structure the discussion, in particular the variant espoused by Vivien Schmidt as it was specifically formulated to analyse and assess institutional changes in types of capitalisms. The thesis investigates how the financial systems of Korea, Malaysia and Thailand have changed in terms of diversification, the nature of competition, and the regulatory and supervisory frameworks. What has become of the role of the state in the financial sector of these economies? Has there been a convergence onto a liberal market model in these financial systems? Or do they still remain closer to the ideal type of a 'state-influenced market economy'? The thesis provides answers to these questions through a detailed account of the evolution of the financial systems of Korea, Malaysia and Thailand since 1997.
Bayer, O., Döring, H., Elsässer, A., Gründel, J., Honecker, M., Jacobs, M., Pesch, O. H., Reuter, H. R., Siefer, G.: Zwei Kirchen - eine Moral?
Creators: name: Vo.
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 36 Nr. 2 (1987): Ökumenische Rundschau, Band 36, Heft 2
Traction : mobility, religion and patriarchy in Shanghai
Creators: name: Lau, Sin Wen
Publisher: name: The Australian National University
Year: 2010
Subjects: subject: HQ1770.S47 L38 2010
subject: Women China Shanghai
subject: Cosmopolitanism China
subject: Christianity and culture China Shanghai
subject: Shanghai (China) Ethnic relations

description: Since the 1980s sizeable communities of 'overseas Chinese' (ethnic Chinese with citizenship rights in countries other than China) have formed in China's major cities. This influx is typically taken as evidence of an enduring relationship between the overseas Chinese and China. However, this perception obscures the ways the overseas Chinese are re-imagining their relationship with China and its people. It also belies the fact that very little is known about how the overseas Chinese structure their lives in reform-era China. This thesis is a study of cosmopolitanism as a way of life in the Circle of Joy, a Christian sisterhood for overseas Chinese women in Shanghai, one of China's biggest and most cosmopolitan cities. Most of these women are upper middle class housewives who entered China accompanying spouses drawn to the country for economic reasons. Everyday life in the sisterhood is orientated by a cosmopolitan logic that draws from deep understandings of what it means to be a woman, diverse notions of Chineseness and the experiences of having lived in multiple places. Focussing on the practices of faith in the Circle of Joy, I explore the ways a distinctive Chinese cosmopolitanism is lived out in the lives of highly mobile women. In particular, I show how the women operationalise cosmopolitan logics through their faith, using Christianity to interpret and cope with dilemmas posed by lives of perpetual movement, cultivating an ethical frame and displaying virtue. Building on Anna Tsing's notion of 'friction', I use the term traction to describe the women's everyday attempts to wrestle with the forces of mobility. They use their religion to gain a communal hold on the ground of Shanghai and fight the disintegrating forces in their lives. The power exerted through this traction defends the rights and privileges of the women as wives as it entrenches particular understandings of what it means to be a woman in a mobile patriarchal order. In examining the ways a cosmopolitan logic is lived out in an overseas Chinese community, this thesis departs from assumptions of an inescapable diasporic yearning for China as homeland and details an alternative imagining of the relationship between the overseas Chinese and the country. In putting forth the realities of life in reform era China for the overseas Chinese, I stress the struggles and contestations over class, race and international politics that underlie idealisations of cosmopolitanism rather than seeing cosmopolitanism as a means of enacting a universal global ideal. When lived, the logic of cosmopolitanism is always a matter of practical connections. By examining these connections, I speak to anthropological debates over concepts like cosmopolitanism, globalisation and diaspora.
Hadronic X-ray Flares from Blazars
Creators: name: Mastichiadis, Apostolos
name: Petropoulou, Maria
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The detection of a high-energy neutrino from the flaring blazar TXS 0506+056 and the subsequent discovery of a neutrino excess from the same direction have strengthened the hypothesis that blazars are cosmic neutrino sources. The lack, however, of $γ$-ray flaring activity during the latter period challenges the standard scenario of correlated $γ$-ray and high-energy neutrino emission in blazars. We propose instead that TeV-PeV neutrinos are produced in coincidence with X-ray flares that are powered by proton synchrotron radiation. In this case, neutrinos are produced by photomeson interactions of protons with their own synchrotron radiation, while MeV to GeV $γ$-rays are the result of synchrotron-dominated electromagnetic cascades developed in the source. Using a time-dependent approach, we find that this "pure hadronic flaring" hypothesis has several interesting consequences. The X-ray flux is a good proxy for the all-flavor neutrino flux, while certain neutrino-rich X-ray flares may be dark in GeV-TeV $γ$-rays. Lastly, hadronic X-ray flares are accompanied by an equally bright MeV component that is detectable by proposed missions like e-ASTROGAM and AMEGO. We then applied this scenario to the extreme blazar 3HSP J095507.9+355101 that has been associated with IceCube-200107A while undergoing an X-ray flare. We showed that the number of muon and antimuon neutrinos above 100 TeV during hadronic flares can be up to $\sim3-10$ times higher than the expected number in standard leptohadronic models. Still, frequent hadronic flaring activity is necessary for explaining the detected neutrino event IceCube-200107A.
description: 14 pages, 5 figures, accepted for publication in ApJ
SMARTSurg prototype ontologies
Creators: name: Topalidou-Kyniazopoulou, Angeliki
Publisher: name: Zenodo
Year: 2020

description: The .zip file contains ontology files where the surgical workflow models of the SMARTSurg operations are contained. Such operations are the following: CABG, RALMR, RAMVR, RAPLM, RAPN, RARC, RARP
Distortional weak-coupling instability of Bogoliubov Fermi surfaces
Creators: name: Timm, Carsten
name: Brydon, P. M. R.
name: Agterberg, Daniel F.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Centrosymmetric multiband superconductors which break time-reversal symmetry generically have two-dimensional nodes, i.e., Fermi surfaces of Bogoliubov quasiparticles. We show that the coupling of the electrons to the lattice always leads to a weak-coupling instability of such a state towards spontaneous breaking of inversion symmetry at low temperatures. This instability is driven by a Cooper logarithm in the internal energy but the order parameter is not superconducting but distortional. We present a comprehensive symmetry analysis and introduce a measure that allows to compare the strengths of competing distortional instabilities. Moreover, we discuss the instability using an effective single-band model. This framework reveals a duality mapping of the effective model which maps the distortional order parameter onto a superconducting one, providing a natural explanation for the Cooper logarithm and the weak-coupling nature of the instability. Finally, we consider the possibility of a pair-density wave state when inversion symmetry is broken. We find that it can indeed exist but does not affect the instability itself.
description: 16+ pages, 4 figures
Comparison of geomagnetic indices during even and odd solar cycles SC17-SC24: Signatures of Gnevyshev gap in geomagnetic activity
Creators: name: Takalo, Jouni J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We show that the time series of sunspot-group areas has a gap, the so-called Gnevyshev gap (GG), between ascending and descending phases of the cycle and especially so for the even-numbered cycles. For the odd cycles this gap is less obvious, and is only a small decline after the maximum of the cycle. We resample the cycles to have the same length of 3945 days (about 10.8 years), and show that the decline is between 1445-1567 days after the start of the cycle for the even cycles, and extending sometimes until 1725 days from the start of the cycle. For the odd cycles the gap is a little earlier, 1332-1445 days after the start of the cycles with no extension. We analyze geomagnetic disturbances for Solar Cycles 17-24 using the Dst-index, the related Dxt- and Dcx-indices, and the Ap-index. In all of these time series there is a decline at the time, or somewhat after, the GG in the solar indices, and it is as deepest between 1567-1725 days for the even cycles and between 1445-1567 days for the odd cycles. The averages of these indices for even cycles in the interval 1445-1725 are 46%, 46%, 18%, and 29% smaller compared to surrounding intervals of similar length for Dst, Dxt, Dcx, and Ap, respectively. For odd cycles the averages of the Dst- and Dxt-indices between 1322-1567 days are 31% and 12% smaller than the surrounding intervals, but not smaller for the Dcx-index and only 4% smaller for the Ap-index. The declines are significant at the 99% level for both even and odd cycles of the Dst-index and for Dxt-, Dcx- and Ap-indices for even cycles. For odd cycles of the Dxt-index the significance is 95%, but the decline is insignificant for odd cycles of the Dcx- and Ap-indices.
description: 16 pages, 13 figures
Phrasebook editing: "photos" through "language"
Creators: name: Rudolph, Johnny (Soni)
name: Drummond, Emily
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: nkr

description: Elicitation to edit a Nukuoro phrasebook, including sections on photos, letters, email, phone, keeping in touch, and language. Corresponds to page 87 in Notebook 3.
Elicitation on definites, indefinites, comparatives, superlatives
Creators: name: Rudolph, Johnny (Soni)
name: Drummond, Emily
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: nkr

description: Elicitation on the different contexts for definite articles (uniqueness vs. familiarity), indefinite articles (epistemic contexts), and some comparatives and superlatives.
Mechanisms of placement and stability of dry process shotcrete
Creators: name: Jolin, Marc
Publisher: name: University of British Columbia
Year: 2009

description: The knowledge available today in shotcrete technology usually permits the production of strong and durable shotcretes. Unfortunately, very few research projects have focused on the development of the shotcrete process itself. Consequently, the fundamental knowledge on the properties and behaviour of fresh dry-mix shotcrete is very limited. The objective of this research project is thus to develop methods to evaluate the properties of fresh dry-mix shotcrete in order to better understand its behaviour, or its shootability. Shootability is defined by the ease and efficiency with which a shotcrete mix can be placed; the main parameters which characterise shootability are rebound, maximum buildup thickness and reinforcement encasement. To understand and control these characteristics requires an understanding of the mechanisms involved in the placement and the stability of a shotcrete layer. These mechanisms involve both rheological and mechanical concepts: the dynamic placement of the material, without external vibration, implies high shear rates, whereas the in-place stability of the fresh material is more closely related to plasticity in terms of shear resistance. The consistency of fresh dry-mix shotcrete is considerably stiffer than that of conventional concrete, and therefore special apparatus and new testing procedures had to be created or adapted to evaluate the fresh properties of this unique material. The tests included the penetration test, fresh tensile strength test and fresh shear strength test. These tests along with detailed analysis of the in-place proportions of the mixtures helped to provide an understanding of the mechanisms needed to optimise the shootability of dry-mix shotcrete. Apart from the properties related to shootability, fundamental properties such as the yield value, the cohesion and the angle of friction were also determined. Additional information has also been gathered on the fresh dynamic properties of shotcrete, which are especially important in understanding the factors affecting the sound placement of a layer of shotcrete. Finally, a set of clear recommendations is proposed in view of the knowledge and information gathered concerning future avenues of research and development.
Fast and Robust Certifiable Estimation of the Relative Pose Between Two Calibrated Cameras
Creators: name: Garcia-Salguero, Mercedes
name: Gonzalez-Jimenez, Javier
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: This work contributes an efficient algorithm to compute the Relative Pose problem (RPp) between calibrated cameras and certify the optimality of the solution, given a set of pair-wise feature correspondences affected by noise and probably corrupted by wrong matches. We propose a family of certifiers that is shown to increase the ratio of detected optimal solutions. This set of certifiers is incorporated into a fast essential matrix estimation pipeline that, given any initial guess for the RPp, refines it iteratively on the product space of 3D rotations and 2-sphere. In addition, this fast certifiable pipeline is integrated into a robust framework that combines Graduated Non-convexity and the Black-Rangarajan duality between robust functions and line processes. We proved through extensive experiments on synthetic and real data that the proposed framework provides a fast and robust relative pose estimation. We make the code publicly available \url{https://github.com/mergarsal/FastCertRelPose.git}.
Operation and control of a seismic simulator
Creators: name: Latendresse, Vincent
Publisher: name: University of British Columbia
Year: 2009

description: This dissertation deals with issues related to digitally controlled hydraulic shake tables with multi-axis degrees of motion. The recently upgraded table at the University of British Columbia was used for a variety of experiments, demonstrating a number of important issues associated with using a seismic simulator to conduct a test. Physical issues are associated with the stiffness and weight of the table, the force rating of the actuators and the capacity of the hydraulic power supply. Control issues are associated with the computer control algorithms, the configuration of analogue and digital controllers and the feedback system. As part of this study, a simplified simulation method was developed to determine the physical demands of a test sequence on a hydraulic system. The method can be efficiently applied to calculate the supply pressure drop, that results from the hydraulic actuator motions. An algorithm that removes undesirable effects of terminal velocity and displacement of a simulated earthquake of prescribed duration was introduced as part of this thesis. It proved to be a powerful tool for the preparation of earthquake time histories for simulation by a state-of-the- art controller. Post-compensation is used to limit the natural permanent drift and terminal velocity that occurs in recordings of earthquake motions. Results from a number of tests conducted at the University of British Columbia were used to demonstrate performance characteristics and limitations of shake table testing. A series of tests conducted on the table with rigidly attached weights helped calibrate the simulation model. The replication performance of the shake table was investigated with the results from test on the dynamic behaviour of telecommunication equipment racks. A 0.27 scale model of as-built bridge bent and a quarter-scale model of a steel plate shear wall building module were tested with the U.B.C. seismic simulator. These studies demonstrated the complexity of the control system and its interaction with the physical parameters of the shake table.
A combined analysis of the $H_0$ late time direct measurements and the impact on the Dark Energy sector
Creators: name: Di Valentino, Eleonora
Publisher: name: arXiv
Year: 2020
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: We combine 23 Hubble constant measurements based on Cepheids-SN Ia, TRGB-SN Ia, Miras-SN Ia, Masers, Tully Fisher, Surface Brightness Fluctuations, SN II, Time-delay Lensing, Standard Sirens and $γ$-ray Attenuation, obtaining our best {\it optimistic} $H_0$ estimate, that is $H_0=72.94\pm0.75$ km/s/Mpc at 68\% CL. This is in $5.9σ$ tension with the $Λ$CDM model, therefore we evaluate its impact on the extended Dark Energy cosmological models that can alleviate the tension. We find more than $4.9σ$ evidence for a phantom Dark Energy equation of state in the $w$CDM scenario, the cosmological constant ruled out at more than $3σ$ in a $w_0w_a$CDM model and more than $5.7σ$ evidence for a coupling between Dark Matter and Dark Energy in the IDE scenario. Finally, we check the robustness of our results, and we quote two additional combinations of the Hubble constant. The {\it ultra-conservative} estimate, $H_0=72.7\pm 1.1$ km/s/Mpc at 68\% CL, is obtained removing the Cepheids-SN Ia and the Time-Delay Lensing based measurements, and confirms the evidence for new physics.
description: 9 pages, 4 figures, Version accepted for publication in MNRAS
Stability of parallel/perpendicular domain boundaries in lamellar block copolymers under oscillatory shear
Creators: name: Huang, Zhi-Feng
name: Vinals, Jorge
Publisher: name: arXiv
Year: 2006
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We introduce a model constitutive law for the dissipative stress tensor of lamellar phases to account for low frequency and long wavelength flows. Given the uniaxial symmetry of these phases, we argue that the stress tensor must be the same as that of a nematic but with the local order parameter being the slowly varying lamellar wavevector. This assumption leads to a dependence of the effective dynamic viscosity on orientation of the lamellar phase. We then consider a model configuration comprising a domain boundary separating laterally unbounded domains of so called parallel and perpendicularly oriented lamellae in a uniform, oscillatory, shear flow, and show that the configuration can be hydrodynamically unstable for the constitutive law chosen. It is argued that this instability and the secondary flows it creates can be used to infer a possible mechanism for orientation selection in shear experiments.
description: 26 pages, 10 figures
Overcoming the rate-directionality tradeoff: a room-temperature ultrabright quantum light source
Creators: name: Abudayyeh, Hamza
name: Brauer, Annika
name: Liran, Dror
name: Lubotzky, Boaz
name: Luder, Lars
name: Fleischer, Monika
name: Rapaport, Ronen
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Applied Physics (physics.app-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Deterministic GHz-rate single photon sources at room-temperature would be essential components for various quantum applications. However, both the slow intrinsic decay rate and the omnidirectional emission of typical quantum emitters are two obstacles towards achieving such a goal which are hard to overcome simultaneously. Here we solve this challenge by a hybrid approach, using a complex monolithic photonic resonator constructed of a gold nanocone responsible for the rate enhancement, and a circular Bragg antenna for emission directionality. A repeatable process accurately binds quantum dots to the tip of the antenna-embedded nanocone. As a result we achieve simultaneous 20-fold emission rate enhancement and record-high directionality leading to an increase in the observed brightness by a factor as large as 580 (120) into an NA = 0.22 (0.5). We project that such miniaturized on-chip devices can reach photon rates approaching 2.3*10^8 single photons/second thus enabling ultra-fast light-matter interfaces for quantum technologies at ambient conditions.
Probable Level Densities and Radiative Strength Functions of Dipole gamma-Transitions in 57Fe Compound Nucleus
Creators: name: Sukhovoj, A. M.
name: Khitrov, V. A.
name: Chol, Li
name: Khang, Pham Dinh
name: Tan, Vuong Huu
name: Hai, Nguyen Xuan
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: From the published results of experimental research of 56Fe(n,2gamma) reaction carried out in Budapest, the values of the most probable densities of cascade intermediate levels with 1/2, 3/2 spin and radiative strength functions of cascade E1 and M1 transitions in 57Fe compound nucleus have been determined. These results correspond to analogous data for other nuclei studied by us and contradict to predictions of conventional models.
description: 11 pages, 5 figures
Heterogeneous excitable systems exhibit Griffiths phases below hybrid phase transitions
Creators: name: Ódor, Géza
name: de Simoni, Beatriz
Publisher: name: arXiv
Year: 2020
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Neurons and Cognition (q-bio.NC)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: In $d > 2$ dimensional, homogeneous threshold models discontinuous transition occur, but the mean-field solution provides $1/t$ power-law activity decay and other power-laws, thus it is called mixed-order or hybrid type. It has recently been shown that the introduction of quenched disorder rounds the discontinuity and second order phase transition and Griffiths phases appear. Here we provide numerical evidence, that even in case of high graph dimensional hierarchical modular networks the Griffiths phase of the $K=2$ threshold model is present below the hybrid phase transition. This is due to the fragmentation of the activity propagation by modules, which are connected via single links. This provides a widespread mechanism in case of threshold type of heterogeneous systems, modeling the brain or epidemics for the occurrence of dynamical criticality in extended Griffiths phase parameter spaces. We investigate this in synthetic modular networks with and without inhibitory links as well as in the presence of refractory states.
description: 10 pages 11 figures, accepted version to appear in Phys. Rev. Research
Gamma-Ray Burst Prompt Emission: Implications from Shock Acceleration Theory
Creators: name: Baring, Matthew G.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The principal paradigm for gamma-ray bursts suggest that the prompt transient gamma-ray signal arises from multiple shocks internal to the relativistic expansion. This paper illustrates some properties of diffusive acceleration at relativistic shocks that pertain to GRB models, providing interpretation of the BATSE/EGRET data. Using a standard Monte Carlo simulation, computations of the spectral shape, and the range of spectral indices are presented, as functions of the shock speed, magnetic field obliquity and the type of particle scattering. It is clear that while quasi-parallel, relativistic shocks with fields approximately normal to the shock plane can efficiently accelerate particles, highly oblique and perpendicular ones cannot unless the particle diffusion is almost isotropic, i.e. extremely close to the Bohm limit. Accordingly, an array of distribution indices should be present in the burst population, as is exhibited by the EGRET data, and even mildly-relativistic internal shocks require strong field turbulence in order to model the >100 MeV observations. In addition, recent spectral fitting to burst data in the BATSE band is discussed, providing probes of the efficiency of injection of non-thermal electrons.
description: 12 pages, 2 embedded figures, Advances Space Research, in press
Minimal models of cooling neutron stars with accreted envelopes
Creators: name: Kaminker, A. D.
name: Gusakov, M. E.
name: Yakovlev, D. G.
name: Gnedin, O. Y.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the "minimal" cooling scenario of superfluid neutron stars with nucleon cores, where the direct Urca process is forbidden and the enhanced cooling is produced by the neutrino emission due to Cooper pairing of neutrons. Extending our previous consideration (Gusakov et al. 2004a), we include the effects of accreted envelopes of light elements. We employ phenomenological density-dependent critical temperatures T_{cp}(ρ) and T_{cnt}(ρ) of singlet-state proton and triplet-state neutron pairing in a stellar core, as well as the critical temperature T_{cns}(ρ) of singlet-state neutron pairing in a stellar crust. We show that the presence of accreted envelopes simplifies the interpretation of observations of thermal radiation from isolated neutron stars in the scenario of Gusakov et al. (2004a) and widens the class of models for nucleon superfluidity in neutron star interiors consistent with the observations.
description: 19 pages, 4 figures; accepted for publication in MNRAS
Keeping up with the cool stars: One TESS year in the life of AB Doradus
Creators: name: Ioannidis, P.
name: Schmitt, J. H. M. M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The long-term, high precision photometry delivered by the Transiting Exoplanet Survey Satellite (TESS) enables us to gain new insight into known and hitherto well-studied stars. In this paper, we present the result of our TESS study of the photospheric activity of the rapid rotator AB Doradus. Due to its favorable position near the southern ecliptic pole, the TESS satellite recorded almost 600 rotations of AB Doradus with high cadence, allowing us to study starspots and flares on this ultra-active star. The observed peak-to-peak variation of the rotational modulations reaches almost 11 %, and we find that the starspots on AB Doradus show highly preferred longitudinal positions. Using spot modeling, we measured the positions of the active regions on AB Doradus and we find that preferred spot configurations should include large regions extending from low to high stellar latitudes. We interpret the apparent movement of spots as the result of both differential rotation and spot evolution and argue that the typical spot lifetimes should range between 10 and 20 days. We further find a connection between the flare occurrence on AB Doradus and the visibility of the active regions on its surface, and we finally recalculated the star's rotation period using different methods and we compared it with previous determinations.
description: 8 pages, 13 figures
Accurate prediction of the $ϕ^{*}_η$ distribution for the forward Z boson production in pp collisions through NNLO+N$^{3}$LL
Creators: name: Ocalan, Kadir
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: This paper presents a phenomenological study for the differential cross section of the forward Z boson production in leptonic decay channels as a function of the angular variable $ϕ^{*}_η$ in proton-proton collisions. The $ϕ^{*}_η$ distribution is predicted for the forward pseudorapidity region $2.0 < η_{l} < 4.5$ of the decay leptons at center-of-mass energies 8, 13, and 14 TeV. Accurate prediction of the $ϕ^{*}_η$ distribution is achieved by means of the state-of-the-art calculations including fixed-order perturbative QCD and large logarithmic corrections. The predicted distributions are obtained by employing the resummation either at next-to-next-to-leading logarithmic (NNLL) or next-to-NNLL (N$^{3}$LL) accuracy which is matched to the perturbative QCD calculation at next-to-next-to-leading order (NNLO) accuracy, that is at NNLO+NNLL and NNLO+N$^{3}$LL, respectively. The Z boson $ϕ^{*}_η$ variable is experimentally preferable as it has been measured more precisely than the Z boson transverse momentum though both variables probe the same physics, thereby an accurate description of the $ϕ^{*}_η$ variable is required by using theoretical predictions at both NNLO+NNLL and NNLO+N$^{3}$LL accuracies. The matched predictions are compared with the available 8 TeV and 13 TeV measurements by the LHCb experiment at the LHC and found to be in good agreement. The 14 TeV predicted distributions at both NNLO+NNLL and NNLO+N$^{3}$LL are also reported. In all the predicted results, the NNLO+N$^{3}$LL provides more improved accuracy for the reliable description of the $ϕ^{*}_η$ distribution throughout its entire phase space region.
description: 16 pages, 10 figures, 2 tables
Elicitation on non-finite clauses and modals
Creators: name: Rudolph, Johnny (Soni)
name: Drummond, Emily
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: nkr

description: Elicitation with a review of embedded and non-finite clauses, followed by a modal questionnaire (Modal Questionnaire for Crosslinguistic Use by Jozina Vanderklok).
A model for the response of single timber fasteners and piles under cyclic and dynamic loading
Creators: name: Allotey, Nii Kwashie
Publisher: name: University of British Columbia
Year: 2009

description: A model is presented for the cyclic and dynamic analysis of timber fasteners and pile foundations. Both systems are, in that they are beam-like structures that are embedded in a flexible medium. In the past, many different numerical methods, ranging from very elaborate finite element models, to closed-form solutions for beams on elastic foundations have been used to analyze these systems. Among these, in the development of computer software, the use of a 1-D finite element implementation of beams on a nonlinear foundation has been shown to be the most promising, mainly due to the relative accuracy and simplicity of the model. In this thesis, such a model is developed for the analysis of both systems. The model is based on one previously developed, which used a beam element on a nonlinear flexible foundation that takes into account the formation of gaps between the fastener/pile and medium. In this thesis, the effect of interface friction, and the initial confining pressure surrounding the fastener/pile has been included in the model. Due to the inclusion of interface friction, the model allows, in the case of piles, the study of problems with horizontal and/or vertical acceleration inputs. The model is the basis for the development of a cyclic analysis code for single timber fasteners, and cyclic and dynamic analysis codes for single piles in cohesionless soil. Various numerical examples of timber fasteners and piles are used to show that the predicted results of the model are consistent with expected response behavior. Since previous models have not taken either friction or initial confining pressure into account, the effect of both of these on the predicted response of both systems has been investigated. It is seen from this study that the amount of initial confining pressure around a timber fastener does not significantly influence the hysteretic response under lateral cyclic loading, but rather influences the amount of withdrawal in the case of driven fasteners. For estimated practical values of the coefficient of friction and tangential stiffness of the interface, friction is seen to have a significant influence on the amount of withdrawal, and not much influence on the hysteretic response. In the case of piles, neither the initial confining pressure nor friction are observed to have any considerable effect on the hysteretic response under lateral cyclic loading