cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
GraXe, graphene and xenon for neutrinoless double beta decay searches
Creators: name: Gomez-Cadenas, J. J.
name: Guinea, F.
name: Fogler, M. M.
name: Katsnelson, M. I.
name: Martin-Albo, J.
name: Monrabal, F.
name: Muñoz-Vidal, J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We propose a new detector concept, GraXe (to be pronounced as grace), to search for neutrinoless double beta decay in Xe-136. GraXe combines a popular detection medium in rare-event searches, liquid xenon, with a new, background-free material, graphene. In our baseline design of GraXe, a sphere made of graphene-coated titanium mesh and filled with liquid xenon (LXe) enriched in the Xe-136 isotope is immersed in a large volume of natural LXe instrumented with photodetectors. Liquid xenon is an excellent scintillator, reasonably transparent to its own light. Graphene is transparent over a large frequency range, and impermeable to the xenon. Event position could be deduced from the light pattern detected in the photosensors. External backgrounds would be shielded by the buffer of natural LXe, leaving the ultra-radiopure internal volume virtually free of background. Industrial graphene can be manufactured at a competitive cost to produce the sphere. Enriching xenon in the isotope Xe-136 is easy and relatively cheap, and there is already near one ton of enriched xenon available in the world (currently being used by the EXO, KamLAND-Zen and NEXT experiments). All the cryogenic know-how is readily available from the numerous experiments using liquid xenon. An experiment using the GraXe concept appears realistic and affordable in a short time scale, and its physics potential is enormous.
description: 17 pages, 4 figures, 2 tables. Several typos and a reference corrected. Version accepted for publication in the Journal of Cosmology and Astroparticle Physics (JCAP)
The detectability of millisecond pulsars in eccentric binary systems
Creators: name: Madsen, Erik
Publisher: name: University of British Columbia
Year: 2013

description: With new, highly sensitive telescopes, increased computational power, and improved search algorithms, the present century has seen a great increase in the discovery of pulsars in globular clusters. These are typically fast-spinning 'millisecond' pulsars, and more often than not they are members of binary systems. Unlike in the Galactic field, millisecond pulsars in globular clusters are often found in eccentric systems because of disruptions and exchanges due to the high stellar density of the cluster environment. A long-standing problem is that of characterizing our sensitivity to pulsars in binary systems, particularly those with non-zero eccentricity. A pulsar's orbital motion modulates its observed pulse period, making its detection through standard Fourier analysis difficult or impossible. A common technique to mitigate this problem is the 'acceleration search', which corrects for uniform line-of-sight acceleration, but not higher-order variations. This is often a valid approximation, and many pulsars have been found this way. However, it is not clear where such a search breaks down. This is a problem with a many-dimensional phase space that includes all of the binary parameters, the pulsar parameters, and the various search inputs. Past studies have approached the problem analytically, and have made valuable insights; however, until recently they have been restricted to circular orbits, and have not accounted for pulsar brightness or signal digitization. Here I approach the problem empirically. I simulate 1.8 million pulsars in a variety of orbital configurations and explore the frequency of pulsar recovery across various dimensions of the phase space. I find in particular that, at very short orbital periods, high eccentricities make binary systems easier to detect.
Radial Migration Does Little for Galactic Disc Thickening
Creators: name: Minchev, I.
name: Famaey, B.
name: Quillen, A. C.
name: Dehnen, W.
name: Martig, M.
name: Siebert, A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Non-axisymmetric components, such as spirals and central bars, play a major role in shaping galactic discs. An important aspect of the disc secular evolution driven by these perturbers is the radial migration of stars. It has been suggested recently that migration can populate a thick-disc component from inner-disc stars with high vertical energies. Since this has never been demonstrated in simulations, we study in detail the effect of radial migration on the disc velocity dispersion and disc thickness, by separating simulated stars into migrators and non-migrators. We apply this method to three isolated barred Tree-SPH N-body galaxies with strong radial migration. Contrary to expectations, we find that as stellar samples migrate, on the average, their velocity dispersion change (by as much as 50%) in such a way as to approximately match the non-migrating population at the radius at which they arrive. We show that, in fact, migrators suppress heating in parts of the disc. To confirm the validity of our findings, we also apply our technique to three cosmological re-simulations, which use a completely different simulation scheme and, remarkably, find very similar results. We believe the inability of migration to thicken discs is a fundamental property of internal disc evolution, irrespective of the migration mechanism at work. We explain this with the approximate conservation of the (average) vertical and radial actions rather than the energy. This "action mixing" can be used to constrain the migration rate in the Milky Way: estimates of the average vertical action in observations for different populations of stars should reveal flattening with radius for older groups of stars.
description: 18 Pages, 13 Figures, A&A Accepted with minor revisions: a paragraph added in Sec.10 discussing the effect of resolution. Higher resolution version can be found at www.ivanminchev.com
Emergy based procurement framework to improve sustainability performance in construction.
Creators: name: Ruparathna, Rajeev Jayanga
Publisher: name: University of British Columbia
Year: 2013

description: In the recent past, sustainable development has been a topic of focus as it affects and is affected by the construction industry. Procurement is identified as a main driver in making construction practices more sustainable. However according to the published literature, traditional procurement practices have widely been criticized for their disregard of the environment and society. Currently there is a lack of awareness and lack of resources available for sustainable procurement in the construction industry, especially in Canada. This study conducts an assessment of sustainable procurement in the Canadian construction industry. In addition, much needed resources for sustainable procurement are expected to be developed through this study. Based on the industry survey involving perspectives of construction managers and project owners across Canada, it was concluded that sustainable procurement is rarely being used in the Canadian construction industry. The empirical study indicated that a limited number of sustainability initiatives are used in construction procurement. Furthermore respondents pointed to lack of funding as the main challenge for sustainable procurement. An in-depth review was conducted on sustainable procurement and current guides available for sustainable procurement. This information was used to develop a conceptual framework for sustainable procurement in construction projects. The framework is expected to support project owners and project managers in implementing sustainable procurement. A design and build proposal evaluation tool (Em-procure) was developed that considers the triple bottom line (TBL) of sustainability. Em-procure tool uses emergy in converting TBL of sustainability into a bid evaluation. Interviews with industry experts confirmed that the Em-procure tool and procurement framework is suitable for industrial use.
On the Structure of Quartic Vertices for Massless Higher Spin Fields on Minkowski Background
Creators: name: Dempster, Paul
name: Tsulaia, Mirian
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider in detail the structure of quartic vertices for massless higher spin fields on Minkowski background, and study the consistency conditions imposed on cubic and quartic interactions by symmetries of the S--matrix. We discuss the possibility of generalizing the construction of quartic vertices to D-dimensional anti-de Sitter space.
description: 29 pages. Introduction part considerably reduced. Comments, a note and a reference added, typos corrected. Published version
Apoderus (Konoapoderus) jekelii Roelofs 1874
Creators: name: Legalov, A. A.
name: Shevnin, E. Yu.
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Attelabidae
Apoderus
Apoderus jekelii

description: Apoderus (Konoapoderus) jekelii Roelofs, 1874
 MATERIAL. Russia, Khabarovskii krai: Bychikha, Corylus, Juglans manshurica, 9-12. VII 2006, 2 ex. (leg. A. Legalov, E. Shevnin).
description: Published as part of Legalov, A. A. & Shevnin, E. Yu., 2007, To The Knowledge Of The Leaf-Rolling Weevils (Coleoptera: Rhinchitidae, Atte- Labidae) Of Bolshekhekhtsirskii Reserve (Khabarovskii Krai), pp. 10-12 in Far Eastern Entomologist 171 on page 1860, DOI: 10.5281/zenodo.10084991
Spin Accumulation Encoded in Electronic Noise for Mesoscopic Billiards with Finite Tunneling Rates
Creators: name: Ramos, J. G. G. S.
name: Barbosa, A. L. R.
name: Bazeia, D.
name: Hussein, M. S.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the effects of spin accumulation (inside reservoirs) on electronic transport with tunneling and reflections at the gates of a quantum dot. Within the stub model, the calculation focus on the current-current correlation function for the flux of electrons injected into the quantum dot. The linear response theory used allows to obtain the noise power in the regime of thermal crossover as a function of parameters that reveal the spin polarization at the reservoirs. The calculation is performed employing diagrammatic integration within the universal groups (ensembles of Dyson) for a non-ideal, non-equilibrium chaotic quantum dot. We show that changes in the spin distribution determines significant alteration in noise behavior at values of the tunneling rates close to zero, in the regime of strong reflection at the gates.
description: New version, 8 pages, 5 figures
Методика и результаты испытаний морских квантовых магнитометров //Серия "Морская геология и геофизика: Экспресс-информация ВИЭМС / М.: ВИЭМС, 1980. №5. С.1 - 20.
Creators: name: Гордин В.М., Любимов В.В.
Publisher: name: Zenodo
Year: 1980
Subjects: Магнитное поле, квантовые магнитометры, морская магнитная съёмка, модульные магнитометры, компонентные магнитометры

description: В работе обсуждаются результаты методических работ и испытаний морской квантовой магнитометрической аппаратуры перед проведением гидромагнитной съёмки и в её процессе.
Why Do We See a Classical World?
Creators: name: Römer, Hartmann
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: History and Philosophy of Physics (physics.hist-ph)
subject: FOS: Physical sciences

description: From a general abstract system theoretical perspective, a quantum-like system description in the spirit of a generalized Quantum Theory may appear to be simpler and more natural than a classically inspired description. We investigate the reasons why we nevertheless conceive ourselves embedded into a classically structured world. Categorial, physical and pragmatic reasons are proposed as explanations.
description: 19 pages, based on a talk given at the symposium in honour of Basil Hiley, Helsinki 11.-14. 11. 2010 New version with minor additions and improvements at various places, expansion of Section 5, additional and updated references
Slinky evolution of domain wall brane cosmology
Creators: name: Kadosh, Avihay
name: Davidson, Aharon
name: Pallante, Elisabetta
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Invoking an initial symmetry between the time $ t $ and some extra spatial dimension $ y $, we discuss a novel scenario where the dynamical formation of the 4-dim brane and its cosmological evolution are induced simultaneously by a common $ ty $ symmetry breaking mechanism. The local maximum of the underlying scalar potential is mapped onto a 'watershed' curve in the $ (t,y) $ plane; the direction tangent to this curve is identified as the cosmic time, whereas the perpendicular direction serves locally as the extra spatial dimension. Special attention is devoted to the so-called slinky configurations, whose brane cosmology is characterized by a decaying cosmological constant along the watershed curve. Such a slinky solution is first constructed within a simplified case where the watershed is constrained by $ y = 0 $. The physical requirements for a slinky configuration to generate a realistic model of cosmological evolution are then discussed in a more elaborated framework.
description: 24 pages, 4 figures, extended discussion of slinky evolution, minor revisions, conclusions unchanged
The bifurcation locus for numbers of bounded type
Creators: name: Carminati, Carlo
name: Tiozzo, Giulio
Publisher: name: arXiv
Year: 2011
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 11A55, 37C45, 37E05, 37E20, 11J06

description: We define a family B(t) of compact subsets of the unit interval which generalizes the sets of numbers whose continued fraction expansion has bounded digits. We study how the set B(t) changes as one moves the parameter t, and see that the family undergoes period-doubling bifurcations and displays the same transition pattern from periodic to chaotic behavior as the usual family of quadratic polynomials. The set E of bifurcation parameters is a fractal set of measure zero and Hausdorff dimension 1. We also show that the Hausdorff dimension of B(t) varies continuously with the parameter, and the dimension of each individual set equals the dimension of a corresponding section of the bifurcation set E.
description: 32 pages, 2 figures. Accepted version in Ergodic Th. Dynam. Systems
Tits alternatives for graph products
Creators: name: Antolín, Yago
name: Minasyan, Ashot
Publisher: name: arXiv
Year: 2011
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20F65 (Primary) 20E07 (Secondary)

description: We discuss various types of Tits Alternative for subgroups of graph products of groups, and prove that, under some natural conditions, a graph product of groups satisfies a given form of Tits Alternative if and only if each vertex group satisfies this alternative. As a corollary, we show that every finitely generated subgroup of a graph product of virtually solvable groups is either virtually solvable or large. As another corollary, we prove that every non-abelian subgroup of a right angled Artin group has an epimorphism onto the free group of rank 2. In the course of the paper we develop the theory of parabolic subgroups, which allows to describe the structure of subgroups of graph products that contain no non-abelian free subgroups. We also obtain a number of results regarding the stability of some group properties under taking graph products.
description: 30 pages, 1 figure. v3: minor revision implementing referee's suggestions
Forced translocation of a polymer: dynamical scaling vs. MD-simulation
Creators: name: Dubbeldam, J. L. A.
name: Rostiashvili, V. G.
name: Milchev, A.
name: Vilgis, T. A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We suggest a theoretical description of the force-induced translocation dynamics of a polymer chain through a nanopore. Our consideration is based on the tensile (Pincus) blob picture of a pulled chain and the notion of propagating front of tensile force along the chain backbone, suggested recently by T. Sakaue. The driving force is associated with a chemical potential gradient that acts on each chain segment inside the pore. Depending on its strength, different regimes of polymer motion (named after the typical chain conformation, "trumpet", "stem-trumpet", etc.) occur. Assuming that the local driving and drag forces are equal (i.e., in a quasi-static approximation), we derive an equation of motion for the tensile front position $X(t)$. We show that the scaling law for the average translocation time $$ changes from $ \sim N^{2ν}/f^{1/ν}$ to $ \sim N^{1+ν}/f$ (for the free-draining case) as the dimensionless force ${\widetilde f}_{R} = a N^νf /T$ (where $a$, $N$, $ν$, $f$, $T$ are the Kuhn segment length, the chain length, the Flory exponent, the driving force, and the temperature, respectively) increases. These and other predictions are tested by Molecular Dynamics (MD) simulation. Data from our computer experiment indicates indeed that the translocation scaling exponent $α$ grows with the pulling force ${\widetilde f}_{R}$) albeit the observed exponent $α$ stays systematically smaller than the theoretically predicted value. This might be associated with fluctuations which are neglected in the quasi-static approximation.
description: 17 pages, 8 figures; figure 5 is new; figures 4 and 6-8 are upgraded
Spatial reuse scheduling and localization for underwater acoustic communication networks
Creators: name: Roee, Diamant
Publisher: name: University of British Columbia
Year: 2013

description: Ocean exploration, through the development of ocean-observation systems, is a key step towards a fuller understanding of life on Earth. Underwater acoustic communication networks (UWANs) will help to fulfill the needs of these ocean-observation systems, whose applications include gathering of scientific data, early warning systems, ecosystem monitoring and military surveillance. The data derived from UWANs is typically interpreted with reference to the location of a data collecting node, e.g. when reporting an event occurrence, or the location of an object itself is of interest, e.g. when tracking a moving underwater vehicle or diver. In this dissertation, we develop methods for localization and efficient data exchange in UWANs. In the first part of this work, we focus on underwater localization (UWL). Since global positioning system signals do not propagate through water, UWL is often based on fusing information from acceleration-based sensors and ranging information to anchor nodes with known locations. We consider practical challenges of UWL. The propagation speed varies with depth and location, anchor and unlocalized nodes are not time-synchronized, nodes are moving due to ocean currents, propagation delay measurements for ranging of non-line-of-sight communication links are mistakenly identified as line-of-sight, and unpredictable changes in the ocean current makes it hard to determine motion models for tracking. Taking these features of UWL into account, we propose localization and tracking schemes that exploit the spatially correlated ocean current, nodes' constant motion, and the periodicity of ocean waves. In the second part of this thesis, we use location information to develop medium access control scheduling algorithms and channel coding schemes. We focus on adaptive scheduling in which each node transmits based on timely network information. Specifically, our scheduling algorithms utilize the long propagation delay in the channel and the sparsity of the network topology to improve throughput, reliability and robustness to topology changes. To evaluate performance, we have developed a simulator combining existing numerical models of ocean current and of power attenuation in the ocean. We have also verified simulation results in four sea experiments of different channel bathymetry structures, using both industry and self-developed underwater acoustic modems.
Measuring the effective phonon density of states of a quantum dot
Creators: name: Madsen, K. H.
name: Kaer, P.
name: Kreiner-Møller, A.
name: Stobbe, S.
name: Nysteen, A.
name: Mørk, J.
name: Lodahl, P.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We employ detuning-dependent decay-rate measurements of a quantum dot in a photonic-crystal cavity to study the influence of phonon dephasing in a solid-state quantum-electrodynamics experiment. The experimental data agree with a microscopic non-Markovian model accounting for dephasing from longitudinal acoustic phonons, and identifies the reason for the hitherto unexplained difference between non-resonant cavity feeding in different nanocavities. From the comparison between experiment and theory we extract the effective phonon density of states experienced by the quantum dot. This quantity determines all phonon dephasing properties of the system and is found to be described well by a theory of bulk phonons.
description: 5 pages, 3 figures, submitted
Mechanisms of soft palate closure in human embryos
Creators: name: Mattson, Melanie
Publisher: name: University of British Columbia
Year: 2013

description: Objectives: The human secondary palate forms between 6-12 weeks of gestation. There has been controversy as to whether palatal shelves in the soft palate join by fusion similar to the hard palate, or whether merging and proliferation of the mesenchyme at the posterior edge of the developing hard palate is the mechanism. The purpose of this study is to examine the mode of soft palate closure in a more representative sample than was used in the single previous study on which all textbooks are based. Methods: Serial sections of secondary palates from 13 human fetuses from 54-74-days of development post conception were stained, photographed and imported into WinSurf 3D software. Anatomical structures were traced including the palatal shelves, midline epithelial seam and palatine aponeurosis, the images aligned and then stacked to create a 3D representation. Results: We analyzed the following numbers of specimens: 54-days-2; 57-days-4; 59 days -2; 64-days-1; 67-days-1; 70-days–2; 74-days-1. At 54-days, a midline seam is present close to the hard palate but more posteriorly the soft palate is open. Between 57 and 59 days a thick midline seam is observed throughout the soft palate. There is some variability between specimens such that the soft palate was closed early in one 59 day specimen and open in a 67-day specimen. One 70-day specimen had no seam whereas the other retained the seam. By 74-days the specimen had complete soft palate union with the presence of a continuous palatine aponeurosis. Overall, our sample included a total of 7 fetuses with a midline seam in the soft palate. Conclusions: The formation of a bilayered epithelial seam followed by breakdown of the seam and mesenchymal fusion is the primary mode of soft palate formation in humans. Epithelial seam removal is rapid and could explain why a seam was not observed in earlier studies.
Thermally- and mechanically-driven quantum turbulence in helium II
Creators: name: Baggaley, A. W.
name: Sherwin, L. K.
name: Barenghi, C. F.
name: Sergeev, Y. A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Quantum turbulence can be generated in superfluid helium either thermally (by applying a heat flux, as in thermal counterflow) or mechanically (by stirring the liquid). By modelling the superfluid vortex lines as reconnecting space curves with fixed circulation, and the driving normal fluid as a uniform flow (for thermal counterflow) and a synthetic turbulent flow (for mechanically-driven turbulence), we determine the difference between thermally-driven and mechanically-driven quantum turbulence. We find that in mechanically-driven turbulence the energy is concentrated at the large scales, the spectrum obeys Kolmogorov scaling, vortex lines have large curvature, and the presence of coherent vortex structures induces vortex reconnections at small angles. On the contrary, in thermally-driven turbulence the energy is concentrated at the mesoscales, the curvature is smaller, the vorticity field is featureless and reconnections occur at larger angles. Our results suggest a method to experimentally infer the presence of superfluid vortex bundles.
description: 20 pages, 11 figures
Long-Range Forces in Direct Dark Matter Searches
Creators: name: Fornengo, N.
name: Panci, P.
name: Regis, M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We discuss the positive indications of a possible dark matter signal in direct detection experiments in terms of a mechanism of interaction between the dark matter particle and the nuclei occurring via the exchange of a light mediator, resulting in a long-range interaction. We analyze the annual modulation results observed by the DAMA and CoGeNT experiments and the observed excess of events of CRESST. In our analysis, we discuss the relevance of uncertainties related to the velocity distribution of galactic dark matter and to the channeling effect in NaI. We find that a long-range force is a viable mechanism, which can provide full agreement between the reconstructed dark matter properties from the various experimental data sets, especially for masses of the light mediator in the 10-30 MeV range and a light dark matter with a mass around 10 GeV. The relevant bounds on the light mediator mass and scattering cross section are then derived, should the annual modulation effects be due to this class of long-range forces.
description: 22 pages, 14 figures. v2: Matches version published on Phys.Rev.D; analysis of CRESST to match the recent release of the new data updated, discussion on astrophysical constraints on self-interacting dark matter added, some typos corrected and some references added, conclusions unchanged. v3: Few typos corrected
Cycnotrachelodes cyanopterus
Creators: name: Legalov, A. A.
name: Shevnin, E. Yu.
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Attelabidae
Cycnotrachelodes
Cycnotrachelodes cyanopterus

description: Cycnotrachelodes (s. str.) cyanopterus (Motschulsky, 1860)
 MATERIAL. Russia, Khabarovskii krai: Bychikha, Lespedeza bicolor, 9-12.VII 2006, 1 ex. (leg. A. Legalov, E. Shevnin).
description: Published as part of Legalov, A. A. & Shevnin, E. Yu., 2007, To The Knowledge Of The Leaf-Rolling Weevils (Coleoptera: Rhinchitidae, Atte- Labidae) Of Bolshekhekhtsirskii Reserve (Khabarovskii Krai), pp. 10-12 in Far Eastern Entomologist 171 on page 1860, DOI: 10.5281/zenodo.10084991
Hawking radiation from "phase horizons" in laser filaments?
Creators: name: Unruh, W. G.
name: Schützhold, R.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Belgiorno et al have reported on experiments aiming at the detection of (the analogue of) Hawking radiation using laser filaments [F. Belgiorno et al, Phys. Rev. Lett. 105, 203901 (2010)]. They sent intense focused Bessel pulses into a non-linear dielectric medium in order to change its refractive index via the Kerr effect and saw creation of photons orthogonal to the direction of travel of the pluses. Since the refractive index change in the pulse generated a "phase horizon" (where the phase velocity of these photons equals the pulse speed), they concluded that they observed the analogue of Hawking radiation. We study this scenario in a model with a phase horizon and a phase velocity very similar to that of their experiment and find that the effective metric does not quite correspond to a black hole. The photons created in this model are not due to the analogue of black hole evaporation but have more similarities to cosmological particle creation. Nevertheless, even this effect cannot explain the observations -- unless the pulse has significant small scale structure in both the longitudinal and transverse dimensions.
description: 13 pages RevTeX, 2 figures
Measurement of the Capillary Length for the Dendritic Growth of Ammonium Chloride
Creators: name: Dougherty, Andrew
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We report the results of a new method of measuring the capillary length for the dendritic crystal growth of non-faceted materials. This method uses a nearly spherical crystal held near unstable equilibrium in an oscillating temperature field. For the growth of ammonium chloride crystals from aqueous solution, previous published estimates of the capillary length varied by over a factor of 20. With this new method, we find the product of the diffusion constant and capillary length $D d_0$ to be $0.78 \pm 0.07 \,\mathrm{μm^3/s}$, similar to that obtained for ammonium bromide crystals.
description: 4 pages, 2 figures. Submitted to Journal of Crystal Growth
Про ювелірну традицію сільського населення Чернігівської землі в ХІ-ХІІ ст
Creators: name: Орлов, Руслан
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 430101
subject: Archaeological science

description: Орлов Р.С. Про ювелірну традицію сільського населення Чернігівської землі в ХІ-ХІІ ст — Друга Чернігівська обласна наукова конференція з історичного краєзнавства (грудень 1988р.): Тези доповідей. Випуск ІІ, - Чернігів-Ніжин. - 1988. - С.24-26.About the jewelry tradition of the rural population of Chernihiv land in the 11th-12th centuries
Composition dependence of elastic constants in wurtzite AlGaInN alloys
Creators: name: Lopuszynski, Michal
name: Majewski, Jacek A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In this paper, we analyze the dependence of elastic constants c_ij on composition for random wurtzite quater- nary AlGayInN alloy in the whole concentration range. The study takes as its starting point the c_ij parameters for zinc blende phase calculated earlier by the authors on the basis of valence force field model. To obtain the wurtzite constants from cubic material parameters the Martin transformation is used. The de- viations from linear Vegard-like dependence of c_ij on composition are analyzed and accurate quadratic fits to calculated moduli are presented. The influence of nonlinear internal strain term in the Martin transformation is also investigated. Our general results for quaternary AlGaInN alloys are compared with the recent ab initio calculations for ternaries GaInN and AlInN (Gorczyca and Lepkowski, Phys. Rev. B 83 203201, 2011) and good qualitative agreement is found.
Cavity optomechanics on a microfluidic resonator with water and viscous liquids
Creators: name: Kim, Kyu Hyun
name: Bahl, Gaurav
name: Lee, Wonsuk
name: Liu, Jing
name: Tomes, Matthew
name: Fan, Xudong
name: Carmon, Tal
Publisher: name: arXiv
Year: 2012
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Currently, optical- or mechanical-resonances are commonly used in microfluidic research. However, optomechanical oscillations by light pressure were not shown with liquids. This is because replacing the surrounding air with water inherently increases the acoustical impedance and hence the associated acoustical radiation-losses. Here, we bridge between microfluidics and optomechanics by fabricating hollow bubble resonators with liquid inside and optically exciting 100-MHz vibrations with only mW optical-input power. This constitutes the first time that any microfluidic system is optomechanically actuated. We further prove the feasibility of microfluidic optomechanics on liquids by demonstrating vibrations on organic fluids with viscous-dissipation higher than blood viscosity while measuring density changes in the liquid via the vibration frequency shift. Our device will enable using cavity optomechanics for studying non-solid phases of matter.
Multi-orbital bosons in bipartite optical lattices
Creators: name: Martikainen, Jani-Petri
name: Larson, Jonas
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study interacting bosons in a two dimensional bipartite optical lattice. By focusing on the regime where the first three excited bands are nearly degenerate we derive a three orbital tight-binding model which captures the most relevant features of the bandstructure. In addition, we also derive a corresponding generalized Bose-Hubbard model and solve it numerically under different situations, both with and without a confining trap. It is especially found that the hybridization between sublattices can strongly influence the phase diagrams and in a trap enable even appearances of condensed phases intersecting the same Mott insulating plateaus.
description: Minor changes
Voices within the Canadian mosaic : Japanese immigrant women and their children's heritage language socialization
Creators: name: Minami, Shiho
Publisher: name: University of British Columbia
Year: 2013

description: This research collected and documented the voices of six Japanese immigrant mothers married to Canadian men who are trying to raise their children to speak Japanese in Metro Vancouver, B.C. Through in-depth, open-ended individual interviews of intermarried Japanese immigrant mothers, the study attempted to examine the meaning of their experiences with regard to their children’s heritage language (HL) socialization. The mothers’ motivations, hopes, practices, challenges, and feelings were examined revealing the complexity and intricacies of their experiences. The results demonstrated that intermarried Japanese mothers who wish to transmit their language onto their children because they view Japanese language skills as beneficial to their children and as an important tool for communication and to foster relationships between them, their children and their family in Japan. The children’s HL socialization was found to be a part of the mother’s ‘work’, and their attitudes and practices regarding their HL transmission project varied depending on how they were affected by various factors; such as public discourse, the ideology surrounding bilingualism, motherhood and the Japanese language, their personality and the role they take up within their family. The mother’s experiences in HL transmission were loaded with emotional moments as they balanced various competing demands and managed the pressure to meet the ‘good mother’ standard. However, some mothers also felt pleasure and empowerment through their role of HL transmitter. The data suggests that children’s HL socialization shifts mothers’ social networks and language use as well as their identities towards a Japanese orientation leading to an evolution and re-affirmation of their Japanese self.
Vector-field model with compensated cosmological constant and radiation-dominated FRW phase
Creators: name: Emelyanov, V.
name: Klinkhamer, F. R.
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A special model of a massless vector-field is presented, which has an extra modified-gravity-type interaction term in the action. The cosmology of the model is studied with standard noninteracting relativistic matter added. It is found that this cosmology can have an early phase where the vector-field starts to compensate a (Planck-scale) cosmological constant and a late Friedmann-Robertson-Walker (FRW) phase where the relativistic-matter energy density dominates the dynamic vacuum energy density.
description: 12 pages, v5: published version (but with a small change in the Note Added)
Slow rupture of frictional interfaces
Creators: name: Sinai, Yohai Bar
name: Brener, Efim A.
name: Bouchbinder, Eran
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The failure of frictional interfaces and the spatiotemporal structures that accompany it are central to a wide range of geophysical, physical and engineering systems. Recent geophysical and laboratory observations indicated that interfacial failure can be mediated by slow slip rupture phenomena which are distinct from ordinary, earthquake-like, fast rupture. These discoveries have influenced the way we think about frictional motion, yet the nature and properties of slow rupture are not completely understood. We show that slow rupture is an intrinsic and robust property of simple non-monotonic rate-and-state friction laws. It is associated with a new velocity scale $c_{min}$, determined by the friction law, below which steady state rupture cannot propagate. We further show that rupture can occur in a continuum of states, spanning a wide range of velocities from $c_{min}$ to elastic wave-speeds, and predict different properties for slow rupture and ordinary fast rupture. Our results are qualitatively consistent with recent high-resolution laboratory experiments and may provide a theoretical framework for understanding slow rupture phenomena along frictional interfaces.
description: 6 pages, 4 figures, 1 table (Supplementary material: 5 pages, 2 figures)
Fissocantharis fuscolineatus
Creators: name: Yang, Yu-Xia
name: Yang, Xing-Ke
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Cantharidae
Fissocantharis
Fissocantharis fuscolineatus

description: Fissocantharis fuscolineatus (Champion, 1926)
 MATERIAL. China: Xizang: Zhangmu, 2200m, 24. VI 1975, 1, leg. Zi-Qing Wang; same data, 2300m, 12. VI 1980, 1, leg. Fu-Sheng Huang; same data, 2400m, 30. VI 1975, 1; same data, 24. VI 1975, 1.
DISTRIBUTION. China (new record): Xizang; India, Nepal (Kazantsev & Brancucci, 2007).
description: Published as part of Yang, Yu-Xia & Yang, Xing-Ke, 2013, Sixteen Species Of The Subfamily Cantharinae (Coleoptera, Cantharidae) New For The Fauna Of China, pp. 17-20 in Far Eastern Entomologist 256 on page 18, DOI: 10.5281/zenodo.10085015
Background-free detection of trapped ions
Creators: name: Linke, N. M.
name: Allcock, D. T. C.
name: Szwer, D. J.
name: Ballance, C. J.
name: Harty, T. P.
name: Janacek, H. A.
name: Stacey, D. N.
name: Steane, A. M.
name: Lucas, D. M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We demonstrate a Doppler cooling and detection scheme for ions with low-lying D levels which almost entirely suppresses scattered laser light background, while retaining a high fluorescence signal and efficient cooling. We cool a single ion with a laser on the 2S1/2 to 2P1/2 transition as usual, but repump via the 2P3/2 level. By filtering out light on the cooling transition and detecting only the fluorescence from the 2P_3/2 to 2S1/2 decays, we suppress the scattered laser light background count rate to 1 per second while maintaining a signal of 29000 per second with moderate saturation of the cooling transition. This scheme will be particularly useful for experiments where ions are trapped in close proximity to surfaces, such as the trap electrodes in microfabricated ion traps, which leads to high background scatter from the cooling beam.
Jet impact on a soap film
Creators: name: Kirstetter, Geoffroy
name: Raufaste, Christophe
name: Celestini, Franck
Publisher: name: arXiv
Year: 2012
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We experimentally investigate the impact of a liquid jet on a soap film. We observe that the jet never breaks the film and that two qualitatively different steady regimes may occur. The first one is a refraction-like behavior obtained at small incidence angles when the jet crosses the film and is deflected by the film-jet interaction. For larger incidence angles, the jet is absorbed by the film, giving rise to a new class of flow in which the jet undulates along the film with a characteristic wavelength. Besides its fundamental interest, this study presents a new way to guide a micro-metric flow of liquid in the inertial regime and to probe foam stability submitted to violent perturbations at the soap film scale.
description: 6 pages, 5 figures
Lycocerus karenensis Champion 1926
Creators: name: Yang, Yu-Xia
name: Yang, Xing-Ke
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Cantharidae
Lycocerus
Lycocerus karenensis

description: Lycocerus karenensis Champion, 1926
 MATERIAL. China: Yunnan: Xiaomengyang, 810m, 3.VI 1957, 1, leg. Fu-Ji Pu; Menghai, 1200-1450m, 24.IV 1957, 1, leg. Shu-Yong Wang; Menghai, Nannuoshan, 1100- 1200m, 28.IV 1957, 1, leg. Fu-Ji Pu; Rd. Kunluo, 1050-1150m, 26.IV 1957, 1, leg. Guang-Ji Hong.
DISTRIBUTION. China (new record): Yunnan; Burma (Kazantsev, 1999).
description: Published as part of Yang, Yu-Xia & Yang, Xing-Ke, 2013, Sixteen Species Of The Subfamily Cantharinae (Coleoptera, Cantharidae) New For The Fauna Of China, pp. 17-20 in Far Eastern Entomologist 256 on page 18, DOI: 10.5281/zenodo.10085015
Simulations of Magnetic Field Generation in Unmagnetized Plasmas via Beat Wave Current Drive
Creators: name: Welch, D. R.
name: Genoni, T. C.
name: Thoma, C.
name: Bruner, N.
name: Rose, D. V.
name: Hsu, S. C.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: This work describes the scientific basis and associated simulation results for the magnetization of an unmagnetized plasma via beat wave current drive. Two-dimensional electromagnetic particle-in-cell simulations have been performed for a variety of angles between the injected waves to demonstrate beat wave generation in agreement with theoretical predictions of the beat-wave wave vector and saturation time, revealing new 2D effects. The simulations clearly demonstrate electron acceleration by the beat waves and resultant current drive and magnetic field generation. The basic process depends entirely on the angle between the parent waves and the ratio of the beat-wave phase velocity to the electron thermal velocity. The wave to magnetic energy conversion efficiency of the cases examined is as high as 0.2%. The technique could enable novel plasma experiments in which the use of magnetic coils is infeasible.
description: 5 pages, 4 figures, accepted by Physical Review Letters (Oct. 15, 2012)
An act concerning public utilities - To create a Board of Public Utility Commissioners and to prescribe its duties and powers
Creators: name: No Name Supplied
Publisher: name: No Publisher Supplied
Year: 1914

description: This pamphlet includes Chapter 195 of the laws of 1911 - an act to create a Board of Public Utilities and to prescribe its duties and powers - and supplements to the same passed up to the close of the Legislative Session of 1914, along with several other acts affecting the duties and powers of the Board of Public Utility Commissioners.
Selective decay by Casimir dissipation in fluids
Creators: name: Gay-Balmaz, F.
name: Holm, D. D.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Mathematical Physics (math-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The problem of parameterizing the interactions of larger scales and smaller scales in fluid flows is addressed by considering a property of two-dimensional incompressible turbulence. The property we consider is selective decay, in which a Casimir of the ideal formulation (enstrophy in 2D flows, helicity in 3D flows) decays in time, while the energy stays essentially constant. This paper introduces a mechanism that produces selective decay by enforcing Casimir dissipation in fluid dynamics. This mechanism turns out to be related in certain cases to the numerical method of anticipated vorticity discussed in \cite{SaBa1981,SaBa1985}. Several examples are given and a general theory of selective decay is developed that uses the Lie-Poisson structure of the ideal theory. A scale-selection operator allows the resulting modifications of the fluid motion equations to be interpreted in several examples as parameterizing the nonlinear, dynamical interactions between disparate scales. The type of modified fluid equation systems derived here may be useful in modelling turbulent geophysical flows where it is computationally prohibitive to rely on the slower, indirect effects of a realistic viscosity, such as in large-scale, coherent, oceanic flows interacting with much smaller eddies.
Microfluidic technologies for the integration of liquid chromatography
Creators: name: Huft, Jens
Publisher: name: University of British Columbia
Year: 2013

description: The microfabrication technique of Multilayer Soft Lithography (MSL) has emerged as the dominant platform for the development of microfluidic devices in biomedical research. However, Multilayer Soft Lithography, as originally developed, has technological limitations that restrict its effectiveness and versatility in implementing laboratory operations on chip. This thesis solves two of these limitations, namely that channel routing is restricted to planar geometries and that no established methods exist for creating solid-phase columns needed to perform on-chip analytical and preparative separations. The first technological advancement is the development of a new fabrication method using laser ablation that enables the automated fabrication of interlayer connections in MSL-based microfluidic devices. Real-time image recognition and computer control allow for robust wafer-scale registration of laser ablation features with moulded channel structures. This new functionality removes the constraint that all connected device features lie in a single plane, significantly enhancing achievable feature density and fluid handling complexity. To further extend the range of accessible bioanalytical applications using MSL-based devices, this thesis also presents the development of a novel microfluidic column geometry that allows rapid packing of multiple microcolumns in parallel with near-perfect yield. These microcolumns are shown to be of high quality, with plate heights comparable to conventional high-performance capillary columns and superior to what has previously been reported for packed microfluidic columns. Finally, this thesis shows how these new capabilities allow for the implementation of the first fully integrated microfluidic liquid chromatography system that exploits advantages of automation, small sample volume and parallel processing. All elements required for automated sample loading, programmable gradient generation, separation, fluorescent detection, and sample recovery are integrated on a single device. The ability to reliably fabricate three-dimensional microfluidic devices and to integrate highly optimized solid-phase columns will open many new opportunities for on-chip integration, bringing the ultimate goal of complete lab-on-a-chip integration closer to reality.