cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Acrocirridae Banse 1969
Creators: name: Ribas, Julia
name: Hutchings, Pat
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Annelida
Polychaeta
Terebellida
Acrocirridae

description: Family Acrocirridae Banse, 1969   Records. Lizard Island: fringing reef between Bird Islet and South Island (14°41′S 145°27′E) AM W.35390; 200 m SW of Freshwater Beach (14°40′S 145°27′E) AM W.35391.
 Comments. No published records of this family occurring in the Lizard region exist to date or for the entire GBR, although AM records indicate the family is present in the area.
description: Published as part of Ribas, Julia & Hutchings, Pat, 2015, Lizard Island Polychaete Workshop: sampling sites and a checklist of polychaetes, pp. 7-34 in Zootaxa 4019 (1) on page 19, DOI: 10.11646/zootaxa.4019.1.4, http://zenodo.org/record/289472
Disentangling the Dynamical Mechanisms for Cluster Galaxy Evolution
Creators: name: Zhang, Xiaolei
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The determination of the dynamical causes of the morphological Butcher-Oemler (BO) effect, or the rapid transformation of a large population of late-type galaxies to earlier Hubble types in the rich cluster environment between intermediate redshifts and the local universe, has been an important unsolved problem which is central to our understanding of the general problems of galaxy formation and evolution. In this article, we survey the existing proposed mechanisms for cluster galaxy transformation, and discuss their relevance and limitations to the explanation of the morphological BO effect. A new infrared diagnostic approach is devised to disentangle the relative importance of several major physical mechanisms to account for the BO effect, and an example of the first application of this procedure to a single rich, intermediate redshift galaxy cluster is given to demonstrate the viability of this approach. The preliminary result of this analysis favors the interaction-enhanced secular evolution process as the major cause of the cluster-galaxy morphological transformation. This conclusion is also supported by a wide range of other published results which are assembled here to highlight their implications on a coherent physical origin for the morphological BO effect.
description: Accepted for publication in the PASP
Colliding solitons for the nonlinear Schrodinger equation
Creators: name: Salem, W. K. Abou
name: Froehlich, J.
name: Sigal, I. M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We study the collision of two fast solitons for the nonlinear Schrödinger equation in the presence of a spatially adiabatic external potential. For a high initial relative speed $\|v\|$ of the solitons, we show that, up to times of order $\log\|v\|$ after the collision, the solitons preserve their shape (in $L^2$-norm), and the dynamics of the centers of mass of the solitons is approximately determined by the external potential, plus error terms due to radiation damping and the extended nature of the solitons. We remark on how to obtain longer time scales under stronger assumptions on the initial condition and the external potential.
description: 27 pages
Alciopidae Ehlers 1864
Creators: name: Ribas, Julia
name: Hutchings, Pat
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Annelida
Polychaeta
Phyllodocida
Alciopidae

description: Family Alciopidae Ehlers, 1864   Records. Lizard Island: Coconut Beach (14°40′S 145°27′E) AM W.16036.
 Comments. Currently there are no published records of this family occurring in the Lizard region. It is likely that additional unregistered AM lots may exist as part of extensive larval fish collections made at Lizard Island by Leis and co workers (personal comment Pat Hutchings).
description: Published as part of Ribas, Julia & Hutchings, Pat, 2015, Lizard Island Polychaete Workshop: sampling sites and a checklist of polychaetes, pp. 7-34 in Zootaxa 4019 (1) on page 19, DOI: 10.11646/zootaxa.4019.1.4, http://zenodo.org/record/289472
Spatial Feature Calibration and Temporal Fusion for Effective One-stage Video Instance Segmentation
Creators: name: Li, Minghan
name: Li, Shuai
name: Li, Lida
name: Zhang, Lei
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Image and Video Processing (eess.IV)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Modern one-stage video instance segmentation networks suffer from two limitations. First, convolutional features are neither aligned with anchor boxes nor with ground-truth bounding boxes, reducing the mask sensitivity to spatial location. Second, a video is directly divided into individual frames for frame-level instance segmentation, ignoring the temporal correlation between adjacent frames. To address these issues, we propose a simple yet effective one-stage video instance segmentation framework by spatial calibration and temporal fusion, namely STMask. To ensure spatial feature calibration with ground-truth bounding boxes, we first predict regressed bounding boxes around ground-truth bounding boxes, and extract features from them for frame-level instance segmentation. To further explore temporal correlation among video frames, we aggregate a temporal fusion module to infer instance masks from each frame to its adjacent frames, which helps our framework to handle challenging videos such as motion blur, partial occlusion and unusual object-to-camera poses. Experiments on the YouTube-VIS valid set show that the proposed STMask with ResNet-50/-101 backbone obtains 33.5 % / 36.8 % mask AP, while achieving 28.6 / 23.4 FPS on video instance segmentation. The code is released online https://github.com/MinghanLi/STMask.
Ampharetidae Malmgren 1866
Creators: name: Ribas, Julia
name: Hutchings, Pat
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Annelida
Polychaeta
Terebellida
Ampharetidae

description: Family Ampharetidae Malmgren, 1866  Prior to this workshop no material of this family has been registered in the AM database. See Alvested & Budaeva, this volume, and the family had not previously been recorded from the GBR, in part a reflection of the lack of sampling of lagoonal and intereefal sediments.
description: Published as part of Ribas, Julia & Hutchings, Pat, 2015, Lizard Island Polychaete Workshop: sampling sites and a checklist of polychaetes, pp. 7-34 in Zootaxa 4019 (1) on page 19, DOI: 10.11646/zootaxa.4019.1.4, http://zenodo.org/record/289472
Supplemental Material for Haber et al., 2019
Creators: name: Haber, Marc
name: Jones, Abigail L.
name: Connell, Bruce A.
name: No First Name Asan
name: Arciero, Elena
name: Huanming Yang
name: Thomas, Mark G
name: Yali Xue
name: Tyler-Smith, Chris
Publisher: name: Figshare
Year: 2019
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Figures S1, S2, and S3Table S1Table
S2. Split-time estimates using the ρ statistic
Superexchange dominates in magnetic topological insulators
Creators: name: Sliwa, Cezary
name: Autieri, Carmine
name: Majewski, Jacek A.
name: Dietl, Tomasz
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: It has been suggested that the enlarged spin susceptibility in topological insulators, described by Van Vleck's formalism, accounts for the ferromagnetism of bismuth-antimony topological chalcogenides doped with transition metal impurities. In contrast, earlier studies of HgTe and related topological systems pointed out that the interband analog of the Ruderman-Kittel-Kasuya-Yosida interaction (the Bloembergen-Rowland mechanism) leads to antiferromagnetic coupling between pairs of localized spins. Here, we critically revisit these two approaches, show their shortcomings, and elucidate why the magnitude of the interband contribution is small even in topological systems. From the proposed theoretical approach and our computational studies of magnetism in Mn-doped HgTe and CdTe, we conclude that, in the absence of band carriers, the superexchange dominates, and its sign depends on the coordination and charge state of magnetic impurities rather than on the topological class of the host material.
description: 12 pages, 4 figures; new version contains extended Supplemental Material
Towards the generalized Shapiro and Shapiro conjecture
Creators: name: Degtyarev, Alex
Publisher: name: arXiv
Year: 2008
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14P25, 14P05

description: We find a new, asymptotically better, bound $g\le\frac14d^2+O(d)$ on the genus of a curve that may violate the generalized total reality conjecture. The bound covers all known cases except $g=0$ (the original conjecture).
Amphinomidae Savigny
Creators: name: Ribas, Julia
name: Hutchings, Pat
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Annelida
Polychaeta
Amphinomida
Amphinomidae

description: Family Amphinomidae Savigny in Lamarck, 1818   This family is well represented in tropical waters and currently includes many so called “cosmopolitan species” including Eurythoe complanata (Pallas, 1766) which has recently been shown to represent at least three cryptic species (Barroso et al. 2010). Borda et al. (2012) discuss the taxonomic problems of the family.
The AM collections of amphinomids from Lizard Island includes representatives of many of these so called “cosmopolitan species” and detailed morphological and molecular studies are needed to resolve these suites.
 Below are the species recorded from the Lizard Island region based on museum databases, but there are no published taxonomic papers. However there are many texts on the GBR which illustrate these often large and conspicuous species and provide names (eg. Hutchings et al. 2008). While their family affiliation is not in doubt, their correct identification is questionable as material is often identified only from photographs which rarely illustrate the diagnostic characters.
Some of the material collected during the recent CReefs expedition was fixed in alcohol and is suitable for molecular studies which are often needed together with morphological studies to resolve the taxonomy of this group.
description: Published as part of Ribas, Julia & Hutchings, Pat, 2015, Lizard Island Polychaete Workshop: sampling sites and a checklist of polychaetes, pp. 7-34 in Zootaxa 4019 (1) on page 19, DOI: 10.11646/zootaxa.4019.1.4, http://zenodo.org/record/289472
Actions of the braid group, and new algebraic proofs of results of Dehornoy and Larue
Creators: name: Bacardit, Lluís
name: Dicks, Warren
Publisher: name: arXiv
Year: 2007
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20F36; 20F34; 20E05; 20F60

description: This article surveys many standard results about the braid group with emphasis on simplifying the usual algebraic proofs. We use van der Waerden's trick to illuminate the Artin-Magnus proof of the classic presentation of the algebraic mapping-class group of a punctured disc. We give a simple, new proof of the Dehornoy-Larue braid-group trichotomy, and, hence, recover the Dehornoy right-ordering of the braid group. We then turn to the Birman-Hilden theorem concerning braid-group actions on free products of cyclic groups, and the consequences derived by Perron-Vannier, and the connections with the Wada representations. We recall the very simple Crisp-Paris proof of the Birman-Hilden theorem that uses the Larue-Shpilrain technique. Studying ends of free groups permits a deeper understanding of the braid group; this gives us a generalization of the Birman-Hilden theorem. Studying Jordan curves in the punctured disc permits a still deeper understanding of the braid group; this gave Larue, in his PhD thesis, correspondingly deeper results, and, in an appendix, we recall the essence of Larue's thesis, giving simpler combinatorial proofs.
description: 51`pages, 13 figures
On the Geometry of the Moduli Space of Real Binary Octics
Creators: name: Chu, Kenneth C. K.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Algebraic Geometry (math.AG)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 32G13

description: The moduli space of smooth real binary octics has five connected components. They parametrize the real binary octics whose defining equations have 0, 1, ..., 4 complex-conjugate pairs of roots respectively. We show that the GIT-stable completion of each of these five components admits the structure of an arithmetic real hyperbolic orbifold. The corresponding monodromy groups are, up to commensurability, discrete hyperbolic reflection groups, and their Vinberg diagrams are computed. We conclude with a simple proof that the moduli space of GIT-stable real binary octics itself cannot be a real hyperbolic orbifold.
description: 23 pages
Nonequilibrium RIXS study of an electron-phonon model
Creators: name: Werner, Philipp
name: Eckstein, Martin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We use the nonequilibrium dynamical mean field theory formalism to compute the equilibrium and nonequilibrium resonant inelastic X-ray scattering (RIXS) signal of a strongly interacting fermionic lattice model with a coupling of dispersionless phonons to the total charge on a given site. In the atomic limit, this model produces phonon subbands in the spectral function, but not in the RIXS signal. Electron hopping processes however result in phonon-related modifications of the charge excitation peak. We discuss the equilibrium RIXS spectra and the characteristic features of nonequilibrium states induced by photo-doping and by the application of a static electric field. The latter produces features related to Wannier-Stark states, which are dressed with phonon sidebands. Thanks to the effect of field-induced localization, the phonon features can be clearly resolved even in systems with weak electron-phonon coupling.
Using the etalon effect for in-situ balancing of the Advanced Virgo arm cavities
Creators: name: Hild, S.
name: Freise, A.
name: Mantovani, M.
name: Chelkowski, S.
name: Degallaix, J.
name: Schilling, R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Several large-scale interferometric gravitational-wave detectors use resonant arm cavities to enhance the light power in the interferometer arms. These cavities are based on different optical designs: One design uses wedged input mirrors to create additional optical pick-off ports for deriving control signals. The second design employs input mirrors without wedge and thus offers the possibility to use the etalon effect inside the input mirrors for tuning the finesse of the arm cavities. In this article we introduce a concept of maximized flexibility that combines both of these options, by featuring wedges at the input mirrors and using the etalon effect instead in the end mirrors. We present a design for the arm cavities of Advanced Virgo. We have used numerical simulations to derive requirements for the manufacturing accuracy of an end mirror etalon for Advanced Virgo. Furthermore, we give analytical approximations for the achievable tuning range of the etalon in dependence on the reflectance, the curvature and the orientation of the etalon back surface.
description: 12 pages, 6 Figures
Credit rationing with an individual short-side rule : estimation for business loans in Canada
Creators: name: Crawford, Allan Charles
Publisher: name: University of British Columbia
Year: 2010

description: It is generally accepted that rationing occurs in loan markets with demand of some borrowers exceeding desired supply by lenders at prevailing interest rates. Previous empirical studies of credit rationing use established disequilibrium econometric methods to estimate structural models of business loan markets. This study argues that existing disequilibrium techniques are not suitable for analyzing credit rationing since they ignore features of loan markets emphasized in the theoretical literature. While recent theory distinguishes between equilibrium and disequilibrium categories of credit rationing, existing empirical work allows only the latter to exist. In addition the traditional empirical model does not derive loan equations from micro foundations despite a theoretical focus on loan determination at the individual borrower level. Instead, equations are constructed by assuming aggregate loan quantity corresponds to the minimum of aggregate supply and demand. These inconsistencies with theory suggest that estimates of rationing from the traditional model are unreliable. Unlike traditional methods the empirical model developed in this study derives aggregate equations from a micro approach to loan determination. Individual loan sizes are determined by the minimum of borrower-specific supply and demand functions and explicit aggregation across all borrowers gives estimating equations with desired properties. An attractive feature of the new model is that it yields the first estimates of equilibrium credit rationing. This allowance for both equilibrium and disequilibrium rationing, together with the micro foundations, means that the proposed model provides greater consistency between theoretical and applied work than has been previously possible. The new model is applied to the market for business loans from Canadian banks for the period 1968 to 1979. Results indicate that rationing is empirically significant as total rationing averages approximately one-third of aggregate flow demand for loans. Equilibrium rationing appears to be an important phenomenon since it exceeds disequilibrium rationing each period. However, intertemporal fluctuations in total rationing are caused primarily by changes in disequilibrium rationing. A comparison of the new and traditional models shows that rationing estimates are greater in the new approach with much of the difference attributable to the amount of equilibrium rationing in that model.
Measuring the electron Yukawa coupling via resonant s-channel Higgs production at FCC-ee
Creators: name: d'Enterria, David
name: Poldaru, Andres
name: Wojcik, George
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The Future Circular Collider (FCC-ee) offers the unique opportunity of studying the Higgs coupling to the electron, $y_e$, via resonant s-channel production, $e^+e^- \to H$, in a dedicated run at $\sqrt{s} = m_H$. The signature for direct Higgs production is a small rise in cross sections for particular final states, consistent with Higgs decays, over the expectations for their occurrence due to SM background processes involving $Z^*,γ^*$, or t-channel exchanges. Performing such a measurement is remarkably challenging for four main reasons. First, the low value of the e$^\pm$ mass leads to a tiny $y_e$ coupling, and correspondingly small cross section: $σ_{ee\to H}\,\propto m_e^2 = 0.57$ fb accounting for initial-state radiation. Second, the $e^+e^-$ beams must be monochromatized such that their c.m. energy spread is commensurate with the narrow width of the SM Higgs boson, $Γ_H = 4.1$ MeV, while keeping large beam luminosities. Third, the Higgs mass must also be known beforehand with a few-MeV accuracy in order to operate the collider at the resonance peak, $\sqrt{s} = m_H$. Last but not least, the cross sections of the background processes are many orders-of-magnitude larger than those of the Higgs decay signals. A generator-level study of 11 Higgs decays using a multivariate analysis, exploiting BDTs to discriminate signal and background events, identifies two final states as the most promising ones in terms of statistical significance: $H\to gg$ and $H\to WW^*\to\ellν$ + 2 jets. For a benchmark 4.1-MeV c.m. energy spread (leading to $σ_{ee\to H}\, = 0.28$ fb) and $\mathcal{L}_{int}=10$ ab$^{-1}$, a $1.3σ$ signal significance can be reached, corresponding to an upper limit on the e$^\pm$ Yukawa at 1.6 times the SM value: $|y_e|<1.6|y^{SM}_e|$ at 95\% confidence level, per IP per year. Directions for future improvements of the study are outlined.
description: 11 pages, 6 figures. EPJ+ Special issue: "A future Higgs and Electroweak factory (FCC): Challenges towards discovery, Focus on FCC-ee"
ПОДВИЖНЫЕ ИГРЫ В ДОШКОЛЬНОМ ВОЗРАСТЕ
Creators: name: Умаров, Абдусамат
name: Умарова, Зулхумор
name: Алишерова, Мохира
Publisher: name: Zenodo
Year: 2023

description: В статье рассматриваются возможности  использования различных групп подвижных игр в старшем дошкольном возрасте для увеличения тренирующего эффекта занятий по физической культуре. Показаны результаты исследований увеличения частоты использования подвижных игр с элементами спортивных игр в зависимости от возрастных особенностей детей. Представлены (для сравнения) показатели двигательной подготовленности детей в зависимости от характера использования подвижных игр.
Collisionless equilibria in general relativity: stable configurations beyond the first binding energy maximum
Creators: name: Günther, Sebastian
name: Straub, Christopher
name: Rein, Gerhard
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We numerically study the stability of collisionless equilibria in the context of general relativity. More precisely, we consider the spherically symmetric, asymptotically flat Einstein-Vlasov system in Schwarzschild and in maximal areal coordinates. Our results provide strong evidence against the well-known binding energy hypothesis which states that the first local maximum of the binding energy along a sequence of isotropic steady states signals the onset of instability. We do however confirm the conjecture that steady states are stable at least up to the first local maximum of the binding energy. For the first time, we observe multiple stability changes for certain models. The equations of state used are piecewise linear functions of the particle energy and provide a rich variety of different equilibria.
description: 23 pages, 8 figures
МЕТОДЫ ПОВЫШЕНИЯ ПРАКТИЧЕСКОЙ ДЕЯТЕЛЬНОСТИ УЧАЩИХСЯ ПРИ ВЫПОЛНЕНИИ ЛАБОРАТОРНЫХ  РАБОТ ПО ФИЗИКЕ
Creators: name: Жумаев Нусрат Амонович Турдиев Улуғбек Қаюмович  Старший преподавател Каршинского филиалa ТУИТ
name: Зиёдуллаев Темурбек Ойбек ўғли  Студент Каршинского филиала ТУИТ
Publisher: name: Zenodo
Year: 2023

description: В статье изложение исследования по применению рекомендаций психологов для повышения интереса учеников к выполнению лабораторных работ по физике. А также проведён анализ видов практической деятельности учеников, с подробным изложением связей между нами.

Ключовые слова и понятия: деятельность, метод, связь, наблюдения, мышления
Analysis of pir gene expression across the Plasmodium life cycle.
Creators: name: Little, Timothy S
name: Cunningham, Deirdre A
name: Vandomme, Audrey
name: Lopez, Carlos Talavera
name: Amis, Sarah
name: Alder, Christopher
name: Addy, John WG
name: McLaughlin, Sarah
name: Hosking, Caroline
name: Christophides, George
name: Reid, Adam J
name: Langhorne, Jean
Publisher: name: The Francis Crick Institute
Year: 2021
Subjects: subject: Model organisms
subject: Infectious Disease
subject: Immunology
subject: FOS: Clinical medicine

description: BACKGROUND: Plasmodium interspersed repeat (pir) is the largest multigene family in the genomes of most Plasmodium species. A variety of functions for the PIR proteins which they encode have been proposed, including antigenic variation, immune evasion, sequestration and rosetting. However, direct evidence for these is lacking. The repetitive nature of the family has made it difficult to determine function experimentally. However, there has been some success in using gene expression studies to suggest roles for some members in virulence and chronic infection. METHODS: Here pir gene expression was examined across the life cycle of Plasmodium berghei using publicly available RNAseq data-sets, and at high resolution in the intraerythrocytic development cycle using new data from Plasmodium chabaudi. RESULTS: Expression of pir genes is greatest in stages of the parasite which invade and reside in red blood cells. The marked exception is that liver merozoites and male gametocytes produce a very large number of pir gene transcripts, notably compared to female gametocytes, which produce relatively few. Within the asexual blood stages different subfamilies peak at different times, suggesting further functional distinctions. Representing a subfamily of its own, the highly conserved ancestral pir gene warrants further investigation due to its potential tractability for functional investigation. It is highly transcribed in multiple life cycle stages and across most studied Plasmodium species and thus is likely to play an important role in parasite biology. CONCLUSIONS: The identification of distinct expression patterns for different pir genes and subfamilies is likely to provide a basis for the design of future experiments to uncover their function.
Boundary null controllability of degenerate heat equation as the limit of internal controllability
Creators: name: Araújo, Bruno Sérgio V.
name: Demarque, Reginaldo
name: Viana, Luiz
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optimization and Control (math.OC)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: In this paper, we recover the boundary null controllability for the degenerate heat equation by analyzing the asymptotic behavior of an eligible family of state-control pairs $((u_{\varepsilon}, h_{\varepsilon}))_{\varepsilon >0}$ solving corresponding singularly perturbed internal null controllability problems. As in other situations studied in the literature, our approach relies on Carleman estimates and meticulous weak convergence results. However, for the degenerate parabolic case, some specific trace operator inequalities must be obtained, in order to justify correctly the passage to the limit argument.
Scaling Relations of Spiral Galaxies
Creators: name: Courteau, S.
name: Dutton, A. A.
name: Bosch, F. van den
name: MacArthur, L. A.
name: Dekel, A.
name: McIntosh, D. H.
name: Dale, D. A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We construct a large data set of global structural parameters for 1300 field and cluster spiral galaxies and explore the joint distribution of luminosity L, optical rotation velocity V, and disk size R at I- and 2MASS K-bands. The I- and K-band velocity-luminosity (VL) relations have log-slopes of 0.29 and 0.27, respectively with sigma_ln(VL)~0.13, and show a small dependence on color and morphological type in the sense that redder, early-type disk galaxies rotate faster than bluer, later-type disk galaxies for most luminosities. The VL relation at I- and K-bands is independent of surface brightness, size and light concentration. The log-slope of the I- and K-band RL relations is a strong function of morphology and varies from 0.25 to 0.5. The average dispersion sigma_ln(RL) decreases from 0.33 at I-band to 0.29 at K, likely due to the 2MASS selection bias against lower surface brightness galaxies. Measurement uncertainties are sigma_ln(V)~0.09, sigma_ln(L)~0.14 and somewhat larger and harder to estimate for ln(R). The color dependence of the VL relation is consistent with expectations from stellar population synthesis models. The VL and RL residuals are largely uncorrelated with each other; the RV-RL residuals show only a weak positive correlation. These correlations suggest that scatter in luminosity is not a significant source of the scatter in the VL and RL relations. The observed scaling relations can be understood in the context of a model of disk galaxies embedded in dark matter halos that invokes low mean spin parameters and dark halo expansion, as we describe in our companion paper (Dutton et al. 2007). We discuss in two appendices various pitfalls of standard analytical derivations of galaxy scaling relations, including the Tully-Fisher relation with different slopes. (Abridged).
description: Accepted for publication at ApJ. The full document, with high-resolution B&W and colour figures, is available at http://www.astro.queensu.ca/~courteau/papers/VRL2007ApJ.pdf . Our data base for 1303 spiral galaxies is also available at http://www.astro.queensu.ca/~courteau/data/VRL2007.dat
A MeerKAT view on galaxy clusters: a radio-optical study of Abell 1300 and MACS J1931.8--2634
Creators: name: de Gregory, B. Terni
name: Hugo, B.
name: Venturi, T.
name: Bernardi, G.
name: Dallacasa, D.
name: Nonino, M.
name: Makhatini, S.
name: Parekh, V.
name: Smirnov, O. M.
name: Giacintucci, S.
name: Kale, R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: In this paper we present results from a radio-optical study of the galaxy populations of the galaxy clusters Abell 1300 and MACS J1931.8$-$2634, a merger and a relaxed system respectively both located at $z \sim 0.3$, aimed at finding evidence of merger-induced radio emission. Radio observations are taken at 1.28 GHz with the MeerKAT interferometer during its early-stage commissioning phase, and combined with archive optical data. We generated catalogues containing 107 and 162 radio sources in the A$~$1300 and MACS J1931.8--2634 cluster fields respectively, above a 0.2 mJy threshold and within a 30~arcmin radius from the cluster centre (corresponding to 8.1 and 8.8 Mpc respectively). By cross-correlating the radio and optical catalogues, and including spectroscopic information, 9 and 6 sources were found to be cluster members and used to construct the radio luminosity functions respectively for both clusters. The comparison of the radio source catalogues between the two cluster fields leads to a marginal difference, with a $2σ$ statistical significance. We derived the radio luminosity function at 1.28 GHz in both clusters, in the power range $22.81 < \rm {log~P_{1.28~GHz}~(W/Hz)} < 25.95$, and obtained that in A 1300 the radio luminosity function averaged over the full radio power interval is only $3.3 \pm 1.9$ times higher than the MACS J1931.8--2634 one, suggesting no statistical difference in their probability to host nuclear radio emission. We conclude that, at least for the two clusters studied here, the role of cluster mergers in affecting the statistical properties of the radio galaxy population is negligible.
description: 18 pages, 8 figures, MNRAS accepted
Local governance : an assessment of the planning and development of Tumbler Ridge
Creators: name: McGrath, Susan
Publisher: name: University of British Columbia
Year: 2010

description: Tumbler Ridge, a resource town situated in northeastern British Columbia, is the first new community developed using the "local government" model. The context for the case study is provided by an examination of resource community development in British Columbia and Western Australia during the post-war period. In both jurisdictions a transition in resource community development methods is evident. The main stimulus for these changes has been the recognition of a variety of endogenous and exogenous problems associated with earlier methods of development. There has been a change away from the paternalistic company town with its outdated mode of private governance to more "open" methods of development which enable a greater degree of self-governance. The Tumbler Ridge project is assessed in some detail in order to Identify its main attributes and drawbacks. Where circumstances such as workforce size, location and anticipated longevity of mining activity favour the establishment of a new town, the Tumbler Ridge case study shows that the "local government" method of development should be preferred over alternative methods of developing new resource communities. The "local government" model has a number of distinct benefits including: financial mechanisms that enable early provision of a high standard of facilities and services, commercial sector brokerage, proactive community development, participatory local government and a reduction in corporate influence. These have resulted in the diminution of social ailments and more rapid progress towards stability and maturity than in resource towns established by alternative methods. The most significant remaining problem is the provision of service sector housing and the attainment of a sufficiently integrated housing market. Changes in the approach to resource community development are primarily the outcome of changes in provincial policy. Whereas in the pre-war and early post-war period, economic development was the overriding factor, in recent decades, settlement policy, which is essentially concerned with social and livability aspects of development, and environmental policy, have introduced a range of other considerations and contributed to present trends in resource community development. The form that future resource community development takes will depend primarily on the disposition of the prevailing political party. To the extent that provincial settlement policy is influenced by the outcome of previous initiatives, Tumbler Ridge is likely to reinforce existing tendencies towards municipally-lead development. One of the most important contributions of the Tumbler Ridge project is that it has enabled the articulation of a set of theoretical relationships that exists between governance institutions, the tools and skills required to operationalize these.
Electrical transport and ferromagnetism in Ga1-xMnxAs synthesized by ion implantation and pulsed-laser melting
Creators: name: Scarpulla, M. A.
name: Farshchi, R.
name: Stone, P. R.
name: Chopdekar, R. V.
name: Yu, K. M.
name: Suzuki, Y.
name: Dubon, O. D.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present a detailed investigation of the magnetic and magnetotransport properties of thin films of ferromagnetic Ga1-xMnxAs synthesized using ion implantation and pulsed-laser melting (II-PLM). The field and temperature-dependent magnetization, magnetic anisotropy, temperature-dependent resistivity, magnetoresistance, and Hall effect of II-PLM Ga1-xMnxAs films have all of the characteristic signatures of the strong p-d interaction of holes and Mn ions observed in the dilute hole-mediated ferromagnetic phase. The ferromagnetic and electrical transport properties of II-PLM films correspond to the peak substitutional Mn concentration meaning that the non-uniform Mn depth distribution is unimportant in determining the film properties. Good quantitative agreement is found with films grown by low temperature molecular beam epitaxy (LT-MBE) and having the similar substitutional Mn_Ga composition. Additionally, we demonstrate that II-PLM Ga1-xMnxAs films are free from interstitial Mn_I because of the high temperature processing. At high Mn implantation doses the kinetics of solute redistribution during solidification alone determine the maximum resulting Mn_Ga concentration. Uniaxial anisotropy between in-plane [-110]and [110] directions is present in II-PLM Ga1-xMnxAs giving evidence for this being an intrinsic property of the carrier-mediated ferromagnetic phase.
Topological Transition in a Non-Hermitian Quantum Walk
Creators: name: Rudner, M. S.
name: Levitov, L. S.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We analyze a quantum walk on a bipartite one-dimensional lattice, in which the particle can decay whenever it visits one of the two sublattices. The corresponding non-Hermitian tight-binding problem with a complex potential for the decaying sites exhibits two different phases, distinguished by a winding number defined in terms of the Bloch eigenstates in the Brillouin zone. We find that the mean displacement of a particle initially localized on one of the non-decaying sites can be expressed in terms of the winding number, and is therefore quantized as an integer, changing from zero to one at the critical point. This problem can serve as a simplified model for nuclear spin pumping in the spin-blockaded electron transport regime of quantum dots in the presence of competing hyperfine and spin-orbital interactions. The predicted transition from pumping to non-pumping is topological in nature, and is hence robust against certain types of noise and decoherence.
description: 4 pages, 3 figures
Capitellidae Grube 1862
Creators: name: Ribas, Julia
name: Hutchings, Pat
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Annelida
Polychaeta
Capitellidae

description: Family Capitellidae Grube, 1862  This family occurs in soft sediments which have been poorly sampled around Lizard and there are no published records of the family from the region. Below are the genera present in the AM collections.
description: Published as part of Ribas, Julia & Hutchings, Pat, 2015, Lizard Island Polychaete Workshop: sampling sites and a checklist of polychaetes, pp. 7-34 in Zootaxa 4019 (1) on page 21, DOI: 10.11646/zootaxa.4019.1.4, http://zenodo.org/record/289472
title: Collatz Sequences in the Light of Graph Theory
Creators: name: Sultanow, Eldar
name: Koch, Christian
name: Cox, Sean
Publisher: name: Universität Potsdam
Year: 2019

description: The Collatz conjecture is a number theoretical problem, which has puzzled countless researchers using myriad approaches. Presently, there are scarcely any methodologies to describe and treat the problem from the perspective of the Algebraic Theory of Automata. Such an approach is promising with respect to facilitating the comprehension of the Collatz sequences "mechanics". The systematic technique of a state machine is both simpler and can fully be described by the use of algebraic means.
The current gap in research forms the motivation behind the present contribution. The present authors are convinced that exploring the Collatz conjecture in an algebraic manner, relying on findings and fundamentals of Graph Theory and Automata Theory, will simplify the problem as a whole.
Masers in AGN environments
Creators: name: Greenhill, L. J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Galactic nuclei are well known sources of OH and H2O maser emission. It appears that intense star formation in ultra-luminous infrared galaxies drives most OH sources. In contrast, nuclear activity appears to drive most H2O sources. When H2O emission originates in accretion disk structures, constrained geometry and dynamics enable robust interpretation of spectroscopic and imaging data. The principal science includes study of AGN geometry at parsec and sub-parsec radii and measurement of geometric distances in the Hubble Flow. New high accuracy estimates of the Hubble constant, "Ho," obtained from maser distances may enable new substantively improved constraints on fundamental cosmological parameters (e.g., dark energy).
description: 10 pages, 6 figures, to appear in proceedings of IAU Symposium 242 "Astrophysical Masers and their Environments", held in Alice Springs, March 2007
Engineering local strain for single-atom nuclear acoustic resonance in silicon
Creators: name: O'Neill, Laura A.
name: Joecker, Benjamin
name: Baczewski, Andrew D.
name: Morello, Andrea
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Mechanical strain plays a key role in the physics and operation of nanoscale semiconductor systems, including quantum dots and single-dopant devices. Here we describe the design of a nanoelectronic device where a single nuclear spin is coherently controlled via nuclear acoustic resonance (NAR) through the local application of dynamical strain. The strain drives spin transitions by modulating the nuclear quadrupole interaction. We adopt an AlN piezoelectric actuator compatible with standard silicon metal-oxide-semiconductor processing, and optimize the device layout to maximize the NAR drive. We predict NAR Rabi frequencies of order 200 Hz for a single $^{123}$Sb nucleus in a wide region of the device. Spin transitions driven directly by electric fields are suppressed in the center of the device, allowing the observation of pure NAR. Using electric field gradient-elastic tensors calculated by density-functional theory, we extend our predictions to other high-spin group-V donors in silicon, and to the isoelectronic $^{73}$Ge atom.
description: 6 pages, 5 figures
Comparison of Magnetic Flux Distribution between a Coronal Hole and a Quiet Region
Creators: name: Zhang, Jun
name: Ma, Jun
name: Wang, Haimin
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Employing Big Bear Solar Observatory (BBSO) deep magnetograms and H$α$ images in a quiet region and a coronal hole, observed on September 14 and 16, 2004, respectively, we have explored the magnetic flux emergence, disappearance and distribution in the two regions. The following results are obtained: (1) The evolution of magnetic flux in the quiet region is much faster than that in the coronal hole, as the flux appeared in the form of ephemeral regions in the quiet region is 4.3 times as large as that in the coronal hole, and the flux disappeared in the form of flux cancellation, 2.9 times as fast as in the coronal hole. (2) More magnetic elements with opposite polarities in the quiet region are connected by arch filaments, estimating from magnetograms and H$α$ images. (3) We measured the magnetic flux of about 1000 magnetic elements in each observing region. The flux distribution of network and intranetwork (IN) elements is similar in both polarities in the quiet region. For network fields in the coronal hole, the number of negative elements is much more than that of positive elements. However for the IN fields, the number of positive elements is much more than that of negative elements. (4) In the coronal hole, the fraction of negative flux change obviously with different threshold flux density. 73% of the magnetic fields with flux density larger than 2 Gauss is negative polarity, and 95% of the magnetic fields is negative, if we only measure the fields with their flux density larger than 20 Gauss. Our results display that in a coronal hole, stronger fields is occupied by one predominant polarity; however the majority of weaker fields, occupied by the other polarity.
title: Quantas horas tem um dia triunfal?
Creators: name: Castro, Ivo
Publisher: name: IELT – Instituto de Estudos de Literatura e Tradição, Faculdade de Ciências Sociais e Humanas, Universidade NOVA de Lisboa
Year: 2014

description: O dia triunfal de Pessoa durou bastante acima de 24 horas. Um longo período de anos decorreu enquanto o poeta compunha, revia e tornava a rever, os 49 poemas conhecidos como O Guardador de Rebanhos. A carta em que ele conta como, em 8.3.1914, tinha escrito em poucas horas mais de metade desses poemas, todos em perfeito estado de acabamento, não é uma peça de história, mas de ficção. Uma larga quantidade de autógrafos sobreviventes ajuda a entender o que, em vez disso, realmente aconteceu: a criação em rascunho de muitos poemas do Guardador situou-se entre Março e Maio de 1914, enquanto o ciclo ganhava forma; depois disso, várias transcrições acompanhadas de trabalhosas revisões foram realizadas durante um período longo, de pelo menos uma década. É justo reconhecer, no entanto, que o arranque criativo que pôs em marcha essa avalanche de revisões textuais pode ser situado, senão em um dia, naquele dia, pelo menos no decurso da primavera de 1914.
description: CASTRO, Ivo (2014) “Quantas horas tem um dia triunfal?”, Revista Estranhar Pessoa, 1: 12–25. ISSN: 2183-4075
Artefacts in volume data generated with high resolution episcopic microscopy (HREM).
Creators: name: Reissig, Lukas F
name: Geyer, Stefan H
name: Rose, Julia
name: Prin, Fabrice
name: Wilson, Robert
name: Szumska, Dorota
name: Galli, Antonella
name: Tudor, Catherine
name: White, Jacqueline K
name: Mohun, Tim J
name: Weninger, Wolfgang J
Publisher: name: The Francis Crick Institute
Year: 2021
Subjects: Developmental Biology
Imaging
Model organisms

description: High resolution episcopic microscopy (HREM) produces digital volume data by physically sectioning histologically processed specimens, while capturing images of the subsequently exposed block faces. Our study aims to systematically define the spectrum of typical artefacts inherent to HREM data and to research their effect on the interpretation of the phenotype of wildtype and mutant mouse embryos. A total of 607 (198 wildtypes, 409 mutants) HREM data sets of mouse embryos harvested at embryonic day (E) 14.5 were systematically and comprehensively examined. The specimens had been processed according to essentially identical protocols. Each data set comprised 2000 to 4000 single digital images. Voxel dimensions were 3 × 3 × 3 µm3. Using 3D volume models and virtual resections, we identified a number of characteristic artefacts and grouped them according to their most likely causality. Furthermore, we highlight those that affect the interpretation of embryo data and provide examples for artefacts mimicking tissue defects and structural pathologies. Our results aid in optimizing specimen preparation and data generation, are vital for the correct interpretation of HREM data and allow distinguishing tissue defects and pathologies from harmless artificial alterations. In particular, they enable correct diagnosis of pathologies in mouse embryos serving as models for deciphering the mechanisms of developmental disorders.