cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Continuous-wave Cascaded-Harmonic Generation and Multi-Photon Raman Lasing in Lithium Niobate Whispering-Gallery Resonators
Creators: name: Moore, Jeremy
name: Tomes, Matthew
name: Carmon, Tal
name: Jarrahi, Mona
Publisher: name: arXiv
Year: 2011
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We report experimental demonstration of continuous-wave cascaded-harmonic generation and Raman lasing in a millimeter-scale lithium niobate whispering-gallery resonator pumped at a telecommunication-compatible infrared wavelength. Intensity enhancement through multiple recirculations in the whispering-gallery resonator and quasi phase-matching through a nonuniform crystal poling enable simultaneous cascaded-harmonic generation up to the fourth-harmonic accompanied by stimulated Raman, two-photon, three-photon, and four-photon Raman scattering corresponding the molecular vibrational wavenumbers 632 cm-1 and 255 cm-1 in z-cut lithium niobate at pump power levels as low as 200mW. We demonstrate simultaneous cascaded-harmonic generation and Raman lasing by observing the spectrum of the scattered light from the resonator and by capturing the image of the decoupled light from the resonator on a color CCD camera.
A Community-Centered Workflow for Morphological Annotation
Creators: name: Sara Court
name: Maria Copot
name: Noah Diewald
name: Stephanie Antetomaso
name: Micha Elsner
Publisher: name: Zenodo
Year: 2022
Subjects: linguistics
language documentation
morphological Annotation

description: A Community-Centered Workflow for Morphological Annotation

Sara Court, Maria Copot, Noah Diewald, Stephanie Antetomaso and Micha Elsner

Presented 7 October 2022 at the Berlin-Brandenburg Academy of Sciences and Humanities at the Conference Where Do We Need to Go From Here? - Language Documentation and Archiving,  in the UNESCO International Decade of Indigenous Languages
Interaction beween polarons and analogous effects in polarized Fermi gases
Creators: name: Giraud, S.
name: Combescot, R.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider an imbalanced mixture of two different ultracold Fermi gases, which are strongly interacting. Calling spin-down the minority component and spin-up the majority component, the limit of small relative density $x=n\ds /n\us$ is usually considered as a gas of non interacting polarons. This allows to calculate, in the expansion of the total energy of the system in powers of $x$, the terms proportional to $x$ (corresponding to the binding energy of the polaron) and to $x^{5/3}$ (corresponding to the kinetic energy of the polaron Fermi sea). We investigate in this paper terms physically due to an interaction between polarons and which are proportional to $x^2$ and $x^{7/3}$. We find three such terms. A first one corresponds to the overlap between the clouds dressing two polarons. The two other ones are due to the modification of the single polaron binding energy caused by the non-zero density of polarons. The second term is due to the restriction of the polaron momentum by the Fermi sea formed by the other polarons. The last one results from the modification of the spin-up Fermi sea brought by the other polarons. The calculation of all these terms is made at the simplest level of a single particle-hole excitation. It is performed for all the possible interaction strengths within the stability range of the polaron. At unitarity the last two terms give a fairly weak contribution while the first one is strong and leads to a marked disagreement with Monte-Carlo results. The possible origins of this discrepancy are discussed.
description: 20 pages, 5 figures
How is complexity measured and detected among community dwelling older people aged 65 years and over? A scoping review
Creators: name: Boak, Jennifer
name: Rasekaba, Tshepo
name: Baxter, Pamela
name: Blackberry, Irene
Publisher: name: La Trobe
Year: 2024
Subjects: classificationCode: 4205
subject: Nursing
subject: FOS: Health sciences

description: Aim: To identify and explore tools that measured and detected complexity of care among community dwelling people aged 65 years and older. Data Sources: Databases were searched for articles published up to 23 September 2022 including CINAHL, EMBASE and MEDLINE, Cochrane database for trials and grey literature. Methods: A scoping review was conducted and reported in accordance with the PRISMA guidelines. Eligible articles included those with participants aged over 65 years, living in the community and studies that included care complexity detection or assessment and how this related to care delivered. Covidence was used to screen titles, abstracts and full-text articles. Results: Eighteen full texts were reviewed; four studies were included in the final review. All selected studies included people aged over 65 years living in the community. A high level of reliability for the items included in the interventions was found. The selected studies included tools for assessing older person's needs with nurses involved in the assessment. Conclusion: The review identified four tools for measuring complexity in community dwelling older people. Two tools have the capacity to objectively measure complexity due to the holistic nature of items included and appear easy to use to support clinical judgement decisions. Impact: The review places a spotlight on the concept of complexity and highlights the lack of definition of care complexity. The synthesized result highlights the need to explore detection of care complexity of older people further and consider ways of supporting clinical judgement and decision making of community nurses. The use of a validated tool may enhance clinical judgement regarding care complexity and may lead to a more consistent and timely approach to care.
Obstructive sleep apnea treatment with continuous positive airway pressure therapy improves renin angiotensin system activity
Creators: name: Nicholl, David
Publisher: name: Graduate Studies
Year: 2012
Subjects: subject: Medicine and Surgery
subject: obstructive sleep apnea
subject: renin angiotensin system
subject: continuous positive airway pressure
subject: angiotensin II
subject: blood pressure

description: Background Obstructive sleep apnea (OSA) is strongly associated with cardiorenal disease. Limited studies suggest that renin angiotensin system (RAS) activation may mediate this relationship. We sought to determine the effect of continuous positive airway pressure (CPAP) on the hemodynamic and circulating RAS component responses to Angiotensin II (AngII) infusion. Methods Twelve moderate-severe OSA subjects with hypoxia were studied in high-salt balance before and 1 month after starting treatment with CPAP. Mean arterial pressure (MAP), plasma renin activity (PRA), and aldosterone were measured in response to AngII (3ng/kg/minx30min, 6ng/kg/minx30min, 30min recovery). Results CPAP corrected OSA; reduced MAP (95±2 vs 89±2mmHg, p=0.019), aldosterone (179±27 vs 115±14pmol/L, p=0.006), and protein excretion (69[39,341] vs 48[22,204]mg/day, p=0.002); and increased MAP sensitivity to 3ng/kg/min AngII (10±2 vs 15±2mmHg, p=0.019), but not 6ng/kg/min AngII or recovery. RAS component sensitivity was unaffected. Conclusions CPAP treatment decreased RAS activity and increased hemodynamic sensitivity to AngII, supporting a role for the RAS in mediating OSA-induced hypertension.
ОБЗОР МОЕЙ ПОИСКОВОЙ СИСТЕМЫ MBBT ПРИ КОНВЕРГЕНЦИИ ОБРАЗОВАТЕЛЬНОЙ СИСТЕМЫ
Creators: name: Олимова, Бахора
Publisher: name: Zenodo
Year: 2023

description: В данной статье освещены важность и актуальность создания большой базы данных в процессе конвергенции образовательных услуг, а также их теоретические и практические аспекты, а также высказаны мнения по данной теме.В рамках подхода, основанного на экономических направлениях экономики знаний, даются конкретные теоретические сведения по формированию компетенций с целью подготовки будущих специалистов экономического направления.
Nontrivial Decay of Aftershock Density With Distance in Southern California
Creators: name: Moradpour Taleshi, Javad
Publisher: name: Graduate Studies
Year: 2014
Subjects: subject: Statistics
subject: FOS: Mathematics
subject: Earthquake
subject: Aftershock
subject: Triggering
subject: ETAS
subject: Southern California seismicity

description: The decay of the aftershock density with distance plays an important role in the discussion of the dominant underlying cause of earthquake triggering. Here, we provide evidence that its form is more complicated than typically assumed and that in particular a transition in the power law decay occurs at length scales comparable to the thickness of the crust. This is supported by an analysis of a high-resolution catalogue for Southern California and surrogate catalogues generated by the Epidemic-Type Aftershock Sequence (ETAS) model, which take into account short-term aftershock incompleteness, anisotropic triggering and variations in the observational magnitude threshold. Our findings indicate specifically that the asymptotic decay in the aftershock density with distance is characterized by an exponent larger than 2.0, which is much bigger than the observed exponent of approximately 1.35 observed for shorter distances. This has also important consequences for time-dependent seismic hazard assessment based on the ETAS model.
The Role of Cell Communication and 3D Cell-Matrix Environment in a Stem Cell-Based Tissue Engineering Strategy for Bone Repair
Creators: name: Damaraju, Swathi
Publisher: name: Graduate Studies
Year: 2014
Subjects: subject: Engineering--Biomedical
subject: Mineralization
subject: Embryonic stem cells
subject: Cell differentiation
subject: Confined compression
subject: Gap Junctions
subject: Nitric oxide production

description: The use of stem cells for the repair of bone and cartilage is a primary research interest in modern tissue engineering strategies. The goal of this doctoral thesis was to investigate the role of cell communication and mechanical stimulation in a 3D tissue engineered construct, and to determine whether this construct could be optimized for bone healing. It is well established that there is an interconnected relationship between connexin-containing gap junctions, cadherins, and integrins in cell communication and the ability of cells to respond to mechanical stimulation. The specific aim of this project was to determine the role of connexin containing gap junctions and confined compression on the biosynthetic activity of embryonic stem cells stimulated to form osteoblasts in a 3D collagen-I scaffold. Results from this project showed that this construct could be optimized for bone repair and cell differentiation could be accelerated by applying mechanical stimulation to cells at an early state of differentiation. This could be further enhanced with the application of a nitric oxide donor. As well, cell communication and the presence of functional connexin-43 gap junctions was required for lineage determination of these cells and to initiate mineralization within the construct. The necessity for cell communication was such that cells were not able to recover their function following communication inhibition. It was shown that dissociation between connexin-43 and integrin α5β1 occurred under communication impairment and could be slightly restored with the application of nitric oxide. Thus, in order for osteoblasts to perceive a mechanical stimulus and initiate mineralization of the matrix in response, functional gap junctions and their association to integrins are required to guide cell fate and function. Under impairment of cell function, nitric oxide can be used as an exogenous factor to refocus differentiation and rescue cell function. Overall, this project helps to bridge in-vivo fracture research with basic stem cell biology, and provides an understanding of the importance of cell communication and 3-dimensional cell-matrix environment in the healing process of bone.
A study of giant radio galaxies at RATAN-600
Creators: name: Khabibullina, M. L.
name: Verkhodanov, O. V.
name: Singh, M.
name: Pyria, A.
name: Nandi, S.
name: Verkhodanova, N. V.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We report the results of flux density measurements in the extended components of thirteen giant radio galaxies, made with the RATAN-600 in the centimeter range. Supplementing them with the WENSS, NVSS and GB6 survey data we constructed the spectra of the studied galaxy components. We computed the spectral indices in the studied frequency range and demonstrate the need for a detailed account of the integral contribution of such objects into the background radiation.
description: 11 pages, 4 figures, 5 tables
Language manuscripts in archives
Creators: name: Nick Thieberger
name: Marco La Rosa
name: Sophie Lewincamp
Publisher: name: Zenodo
Year: 2022
Subjects: language documentation
manuscripts
archiving

description: Language manuscripts in archives
Nick Thieberger, Marco La Rosa, Sophie Lewincamp
Presented 7 October 2022 at the Berlin-Brandenburg Academy of Sciences and Humanities at the Conference Where Do We Need to Go From Here? - Language Documentation and Archiving,  in the UNESCO International Decade of Indigenous Languages
Developing a Model Corpus for Endangered Languages
Creators: name: Hashi, Awil
Publisher: name: Graduate Studies
Year: 2014
Subjects: subject: Education
subject: Educational Technology
subject: Endangered Languages
subject: Corpus Linguistics
subject: Sustainability
subject: Somali Language

description: World languages are becoming endangered at an unprecedented rate. Linguists estimate that 50-90% of the world’s 6700 languages are endangered. Krauss (1992) predicted that as few as 10% of the world’s languages may survive by 2100, which means we may be left with only 670 languages. Given the relationship between linguistic diversity, cultural diversity, intellectual diversity and biological diversity, this study is timely because it contributes to maintaining the biodiversity of languages. This research expands upon the previous success of corpus linguistics for certain world languages to develop and document the Somali language. This educational technology study examines the phenomenon of endangered languages by examining technology and languages in Corpus Linguistics, the study of language in real world texts. Through analysis and a review of the literature and historical precedents, the study demonstrates how the Somali language, spoken by millions, can be labelled an endangered language. Using a pragmatic approach and expanding upon the theories and experience of previous corpus constructions, this study developed an iterative design framework in five separate but complementary phases for corpus design in challenging contexts and drafted a sampling frame for text collection. The research designed and built a Somali language corpus as a working prototype for endangered languages that illustrates how it could be used for language development and documentation purposes. Phase one used the Somali language and collected 22 texts from different genres to produce a general corpus of 865,214 words. Aided by quantitative results generated by antConc corpus tools, the study reveals the 20 most frequently used Somali words. The identification of such words has practical implications for teachers, students, curriculum developers, lexicographers, and language policy makers because their high frequency has pedagogical significance. The study illustrates how corpus tools identify the least commonly used words with implications for those who are involved in language documentation and development initiatives. Using types/token ratio analysis, the study indicates that certain genres such as poetry have an inherently richer vocabulary, which has implications for lexicographers and those who are involved in vocabulary and terminology development in languages.
Halo expansion in cosmological hydro simulations: towards a baryonic solution of the cusp/core problem in massive spirals
Creators: name: Maccio', Andrea V.
name: Stinson, Greg
name: Brook, Chris B.
name: Wadsley, James
name: Couchman, H. M. P.
name: Shen, Sijing
name: Gibson, Brad K.
name: Quinn, Tom
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: A clear prediction of the Cold Dark Matter model is the existence of cuspy dark matter halo density profiles on all mass scales. This is not in agreement with the observed rotation curves of spiral galaxies, challenging on small scales the otherwise successful CDM paradigm. In this work we employ high resolution cosmological hydro-dynamical simulations to study the effects of dissipative processes on the inner distribution of dark matter in Milky-Way like objects (M~1e12 Msun). Our simulations include supernova feedback, and the effects of the radiation pressure of massive stars before they explode as supernovae. The increased stellar feedback results in the expansion of the dark matter halo instead of contraction with respect to N-body simulations. Baryons are able to erase the dark matter cuspy distribution creating a flat, cored, dark matter density profile in the central several kpc of a massive Milky-Way like halo. The profile is well fit by a Burkert profile, with fitting parameters consistent with the observations. In addition, we obtain flat rotation curves as well as extended, exponential stellar disk profiles. While the stellar disk we obtain is still partially too thick to resemble the MW thin disk, this pilot study shows that there is enough energy available in the baryonic component to alter the dark matter distribution even in massive disc galaxies, providing a possible solution to the long standing problem of cusps vs. cores.
description: 5 pages, 4 figures, accepted for publication in ApJ Letter
Shale Gas Numerical Simulation: A Quintuple Porosity Approach
Creators: name: Lopez Jimenez, Bruno Armando
Publisher: name: Graduate Studies
Year: 2014
Subjects: subject: Engineering--Petroleum
subject: Dissolved Gas
subject: Finite difference method
subject: Adsorbed porosity

description: Natural gas is stored in shales in different ways: (1) gas adsorbed in the kerogen material, (2) free gas in inorganic inter-particle and intraparticle (matrix) porosity, (3) free gas in a pore network developed within the organic matter or kerogen, (4) free gas in microfracture and slot porosity, and (5) free gas stored in hydraulic fractures created during stimulation of the shale reservoir. An additional storage element is provided by gas dissolved in kerogen. These observations and the dominant nanoscale porosity in shale reservoirs were the focus of the present research and led to the following original developments: 1. A method for calculating an adsorbed porosity based on the strict definition of porosity, i.e., ratio of pore volume to bulk volume. Mathematical expressions for both intrinsic and scaled to bulk volume adsorbed porosities are presented in this thesis. 2. A physics-based quintuple porosity model for handling storage and fluid flow in shale gas reservoirs. The governing equations that describe the gas mass balance in the quintuple porosity model are presented in detail. 3. 2D radial and orthogonal numerical simulation fully implicit models built from scratch for handling the different types of porosities mentioned above and diffusion of gas dissolved in kerogen. The adsorbed porosity mentioned in item 1 above is based on calculation of the thickness of the methane adsorbed monolayer and the size of organic pores in shales at a given pressure and temperature. The complexity of quintuple porosity shales radial and orthogonal numerical models mentioned in items 2 and 3 above is high but they account successfully for viscous and non-Darcy flow in shale nanopores (slip flow and Knudsen diffusion). Consequently, they help to provide a better understanding of the flow mechanisms occurring in these reservoirs. Real data from Devonian gas shales are used to illustrate the effect of free gas, adsorbed gas and dissolved gas in kerogen in a material balance crossplot of P/Z vs. cumulative gas production. It is concluded that not taking into account all the porosities mentioned above plus diffusion of gas dissolved in kerogen can lead to pessimistic values of original gas in place (OGIP) and recoveries. This has been the case of Devonian shales in the Appalachian Basin in North-Eastern United States where hydraulically fractured vertical wells have been producing for several decades far beyond original expectations. In many cases fluid flow has been observed to go on for 25 years without reaching boundary dominated flow.
On the selection of the classical limit for potentials with BV derivatives
Creators: name: Athanassoulis, Agissilaos
name: Paul, Thierry
Publisher: name: arXiv
Year: 2012
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We consider the classical limit of the quantum evolution, with some rough potential, of wave packets concentrated near singular trajectories of the underlying dynamics. We prove that under appropriate conditions, even in the case of BV vector fields, the correct classical limit can be selected.
Mesoscopic Biochemical Basis of Isogenetic Inheritance and Canalization: Stochasticity, Nonlinearity, and Emergent Landscape
Creators: name: Qian, Hong
name: Ge, Hao
Publisher: name: arXiv
Year: 2012
Subjects: subject: Subcellular Processes (q-bio.SC)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Biochemical reaction systems in mesoscopic volume, under sustained environmental chemical gradient(s), can have multiple stochastic attractors. Two distinct mechanisms are known for their origins: ($a$) Stochastic single-molecule events, such as gene expression, with slow gene on-off dynamics; and ($b$) nonlinear networks with feedbacks. These two mechanisms yield different volume dependence for the sojourn time of an attractor. As in the classic Arrhenius theory for temperature dependent transition rates, a landscape perspective provides a natural framework for the system's behavior. However, due to the nonequilibrium nature of the open chemical systems, the landscape, and the attractors it represents, are all themselves {\em emergent properties} of complex, mesoscopic dynamics. In terms of the landscape, we show a generalization of Kramers' approach is possible to provide a rate theory. The emergence of attractors is a form of self-organization in the mesoscopic system; stochastic attractors in biochemical systems such as gene regulation and cellular signaling are naturally inheritable via cell division. Delbrück-Gillespie's mesoscopic reaction system theory, therefore, provides a biochemical basis for spontaneous isogenetic switching and canalization.
description: 24 pages, 6 figures
Doctoral thesis recital (collaborative piano)
Creators: name: Thanakarn Limtham
Publisher: name: The University of Texas at Austin
Year: 2019
Subjects: Songs with piano
Sonatas (Flute and piano)
Clarinet and piano music
Operas--Excerpts, Arranged

description: [From Fidelio. Ha! Welch ein Augenblick / Ludwig van Beethoven -- From Carmen. Chanson du toreador / Georges Bizet -- From Ernani. Lo vedremo, o veglio audace / Giuseppe Verdi -- Sonata for flute and piano, op. 167 : Undine / Carl Reinecke -- Grand duo concertant : op. 48 / Carl Maria von Weber]
Wave-particle interactions in non-uniform plasma and the interpretation of Hard X-ray spectra in solar flares
Creators: name: Kontar, E. P.
name: Ratcliffe, H.
name: Bian, N. H.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Context. High energy electrons accelerated during solar flare are abundant in the solar corona and in the interplanetary space. Commonly, the number and the energy of non-thermal electrons at the Sun is estimated using hard X-ray (HXR) spectral observations (e.g. RHESSI) and a single-particle collisional approximation. Aims. To investigate the role of the spectrally evolving Langmuir turbulence on the population of energetic electrons in the solar corona. Methods. We numerically simulate the relaxation of a power-law non-thermal electron population in a collisional inhomogeneous plasma including wave-particle, and wave-wave interactions. Results. The numerical simulations show that the long-time evolution of electron population above 20 keV deviates substantially from the collisional approximation when wave-particle interactions in non-uniform plasma are taken into account. The evolution of Langmuir wave spectrum towards smaller wavenumbers, due to large-scale density fluctuations and wave-wave interactions, leads to an effective acceleration of electrons. Furthermore, the time-integrated spectrum of non-thermal electrons, which is normally observed with HXR above 20 keV, is noticeably increased due to acceleration of non-thermal electrons by Langmuir waves. Conclusions. The results show that the observed HXR spectrum, when interpreted in terms of collisional relaxation, can lead to an overestimated number and energy of energetic electrons accelerated in the corona.
description: 8 pages, 6 figures, submitted to Astronomy and Astrophysics Journal
Le rôle des orphelines dans la littérature : Le Premier Jardin d'Anne Hébert et Le Manteau noir de Chantal Chawaf.
Creators: name: Darveau, Stéphanie
Publisher: name: University of British Columbia
Year: 2010

description: Dans plusieurs oeuvres littéraires, les orphelins occupent une place importante. Dans cette étude, il est question du rôle que jouent les orphelines dans les romans écrits par des femmes. À travers l’analyse textuelle d’un roman d’une auteure d’origine québécoise, Le Premier Jardin d’Anne Hébert, et du roman d’une auteure française, Le Manteau noir, de Chantal Chawaf, il a été possible de comparer l’usage que, font des écrivaines de culturelles légèrement différentes, d’orphelines dans leurs écrits. Hébert et Chawaf utilisent toutes deux leur personnage principale pour mettre en scène une crise d’identité, problème associé au fait d’être orpheline. L’absence de la mère, qui est à la base de cette crise, est centrale aux deux romans, plus visible chez Chawaf, qui s’avère être elle-même orpheline de naissance. Cette carence d’amour maternelle amène les deux héroïnes à aller à la recherche de leurs racines et à se créer un arbre généalogique imaginaire. Chez Anne Hébert, la lignée commence avec les filles du Roy, pour continuer avec les domestiques de la ville de Québec, orphelines pour la plupart. Chez Chawaf, les victimes de la guerre, surtout de la Deuxième Guerre, forme l’arbre généalogique. Hébert et Chawaf, à travers les orphelines, n’explorent pas seulement la mémoire individuelle de ces orphelines, montrant aux lecteurs comment leur société respective les percevaient et les traitait, mais elles soulèvent aussi les lacunes de la mémoire nationale. Ainsi, dans Le Premier Jardin, Hébert écrit une histoire fictionnalisée du Québec où les femmes, même les marginales, jouent un rôle essentiel. Dans Le Manteau noir, les victimes de la guerre sont inscrites dans l’histoire, les sortant de l’anonymat. Les deux romans étudiés peuvent traiter le sujet des origines, personnelles et nationales, grâce à l’histoire d’une orpheline.
THEORETICAL FOUNDATIONS OF ECONOMIC EDUCATION IN PRESCHOOL EDUCATIONAL INSTITUTIONS
Creators: name: Azizova, Ziroatxon
name: Ganiyeva, Farangiz
name: Ibrohimova, Muxlisa
Publisher: name: Zenodo
Year: 2023

description: The article covers the theoretical foundations of the use of innovative technologies in the provision of economic upbringing to preschool children, the advantages of introducing innovative technologies into preschool education and the analysis of innovative methods in the provision of economic upbringing to children.
Jet Power in Pre-Planetary Nebulae: Observations vs. Theory
Creators: name: Huggins, P. J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: High velocity jets are among the most prominent features of a wide class of planetary nebulae, but their origins are not understood. Several different types of physical model have been suggested to power the jets, but there is no consensus or preferred scenario. We compare current theoretical ideas on jet formation with observations, using the best studied pre-planetary nebulae in millimeter CO, where the dynamical properties are best defined. In addition to the mass, velocity, momentum, and energy of the jets, the mass and energetics of the equatorial mass-loss that typically accompanies jet formation prove to be important diagnostics. Our integrated approach provides estimates for some key physical quantities - such as the binding energy of the envelope when the jets are launched - and allows testing of model features using correlations between parameters. Even with a relatively small sample of well-observed objects, we find that some specific scenarios for powering jets can be ruled out or rendered implausible, and others are promising at a quantitative level.
description: 4 pages, 1 figure, to appear in "Planetary Nebulae: an Eye to the Future", IAU Symposium 283, eds. A Manchado, L. Stanghellini, D. Schoenberner
Chaos and Regularity in Semiconductor Microcavities
Creators: name: Eleuch, Hichem
name: Prasad, Awadhesh
Publisher: name: arXiv
Year: 2012
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Our work presents a study on the nonlinear dynamical behavior for a microcavity semiconductor containing a quantum well. Using an external periodic perturbation in energy level we observe the periodic-doubling, quasiperiodic, and direct route to chaos as forcing strength is changed. For a particular case the riddled basin for coexisting periodic and chaotic motions are observed. These results suggest that the dynamics of exciton-photon is quite complex in presence of external perturbation.
description: To be appeared in Phys. Lett. A
Experimental demonstration of counterfactual quantum communication
Creators: name: Liu, Yang
name: Ju, Lei
name: Liang, Xiao-Lei
name: Tang, Shi-Biao
name: Tu, Guo-Liang Shen
name: Zhou, Lei
name: Peng, Cheng-Zhi
name: Chen, Kai
name: Chen, Teng-Yun
name: Chen, Zeng-Bing
name: Pan, Jian-Wei
Publisher: name: arXiv
Year: 2011
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Based on principle of quantum mechanics, quantum cryptography provides an intriguing way to establish secret keys between remote parties, generally relying on actual transmission of signal particles. Surprisingly, an even more striking method is recently proposed by Noh named as `counterfactual quantum cryptography' enabling key distribution, in which particles carrying secret information are seemly not being transmitted through quantum channel. We experimentally give here a faithful implementation by following the scheme with an on-table realization. Furthermore, we report an illustration on a 1 km fiber operating at telecom wavelength to verify its feasibility for extending to long distance. For both cases, high visibilities of better than 98% are maintained with active stabilization of interferometers, while a quantum bit error rate around 5.5% is attained after 1 km channel.
description: 15 pages, 1 figure, 1 table
Atlas Telamon: US Grand Strategy and Terrorism Since 9/11
Creators: name: Ambler, Braden R.W.
Publisher: name: Graduate Studies
Year: 2014
Subjects: subject: Political Science
subject: FOS: Political science
subject: grand strategy, terrorism, US grand strategy

description: This paper examines the interaction between US grand strategy and the threat of terrorism posed by the al-Qa’ida network over thirteen years following 9/11. It focuses analysis on the question: to what extent has terrorism affected US grand strategy since 9/11? Utilizing Barry R. Posen’s conception of grand strategy it contends that all four post-Cold War administrations’ have pursued a grand strategy of primacy through US global leadership—albeit to varying degrees of intensity. Furthermore, it argues that the continued threat of terrorism since 9/11 has caused a demonstrable shift in the context in which the objectives of this grand strategy have been pursued. It has changed from a predominately peacetime context where the exploitation of US primacy and the expansion of the liberal democratic international order were relatively easy, to a predominately wartime context where it has become increasingly costly and difficult in an era of persistent conflict.
Two-Photon Spiral Imaging with Correlated Orbital Angular Momentum States
Creators: name: Simon, David S.
name: Sergienko, Alexander V.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The concept of correlated two-photon spiral imaging is introduced. We begin by analyzing the joint orbital angular momentum (OAM) spectrum of correlated photon pairs. The mutual information carried by the photon pairs is evaluated, and it is shown that when an object is placed in one of the beam paths the value of the mutual information is strongly dependent on object shape and is closely related to the degree of rotational symmetry present. After analyzing the effect of the object on the OAM correlations, the method of correlated spiral imaging is described. We first present a version using parametric downconversion, in which entangled pairs of photons with opposite OAM values are produced, placing an object in the path of one beam. We then present a classical (correlated, but non-entangled) version. The relative problems and benefits of the classical versus entangled configurations are discussed. The prospect is raised of carrying out compressive imaging via twophoton OAM detection to reconstruct sparse objects with few measurements.
High-field magnetization and magnetoresistance of the $A$-site ordered perovskite oxide CaCu$_{3}$Ti$_{4-x}$Ru$_{x}$O$_{12}$~($0 \le x \le 4$)
Creators: name: Kida, T.
name: Kammuri, R.
name: Hagiwara, M.
name: Yoshii, S.
name: Kobayashi, W.
name: Iwakawa, M.
name: Terasaki, I.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We have measured high-field magnetization and magnetoresistance of polycrystalline samples of the A-site ordered perovskite CaCu3Ti4-xRuxO12 (x=0 - 4) utilizing a non-destructive pulsed magnet. We find that the magnetization for x=0.5, 1.0 and 1.5 is nonlinear, and tends to saturate in high fields. This is highly nontrivial because the magnetization for x=0 and 4 is linear in external field up to the highest one. We have analyzed this field dependence based on the thermodynamics of magnetic materials, and propose that the external fields delocalize the holes on the Cu2+ ions in order to maximize the entropy. This scenario is qualitatively consistent with a large magnetoresistance of -70% observed at 4.2 K at 52 T for x=1.5.
description: 13 pages, 4 figures
A wave equation approach to ultrasound elastography
Creators: name: Baghani, Ali
Publisher: name: University of British Columbia
Year: 2010

description: Tissue elastography is a field of medical imaging which deals with obtaining images of tissue mechanical properties, in particular tissue elasticity. Every elastography imaging system has three major components: an exciter, an imaging system, and an image processing software module. The principle of operation of these systems is that softer and harder tissues react differently to a mechanical excitation. The imaging system captures images of the tissue as the mechanical exciter deforms the tissue. The image processing software module then computes the tissue motion from the acquired images, and solves an inverse problem to obtain tissue elasticity from tissue displacements. In ultrasound elastography all three components of the displacement are not available, and the measurement is carried out only on the imaging plane. The problem of inversion using partial measurements is an inherently challenging problem. To solve this problem the phase speed is estimated in the first place. This thesis studies the process of estimating tissue elasticity from tissue displacements, using the phase speed estimation. It is shown that, in general, the elasticity cannot be inferred from the phase speed, but under certain boundary and excitation conditions, a relationship exists between the phase speed and the elasticity. However the relationship depends on the boundary and excitation conditions. Based on the developed results, a novel rheometry method is proposed for visco-elastic characterization of tissue samples. To increase the resolution of the elasticity images it is of interest to use higher frequencies of excitation. However the inherent low frame rate of ultrasound systems posed a limitation. A novel high-frame-rate ultrasound system is introduced which is capable of tracking motions of up to 500Hz. The high-frame-rate system is used in conjunction with the inversion algorithms to form an elastography system. The performance of the system is tested experimentally on tissue mimicking material having hard and soft inclusions.
Networks with time structure from time series
Creators: name: Nakamura, Tomomichi
name: Tanizawa, Toshihiro
Publisher: name: arXiv
Year: 2012
Subjects: subject: Other Statistics (stat.OT)
subject: Chaotic Dynamics (nlin.CD)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: We propose a method of constructing a network, in which its time structure is directly incorporated, based on a deterministic model from a time series. To construct such a network, we transform a linear model containing terms with different time delays into network topology. The terms in the model are translated into temporal nodes of the network. On each link connecting these nodes, we assign a positive real number representing the strength of relationship, or the "distance," between nodes specified by the parameters of the model. The method is demonstrated by a known system and applied to two actual time series.
description: 15 pages, 5 figures, accepted to be published in Physica A
On the Witten Rigidity Theorem for String$^c$ Manifolds
Creators: name: Yu, Jianqing
name: Liu, Bo
Publisher: name: arXiv
Year: 2012
Subjects: subject: Differential Geometry (math.DG)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We establish the family rigidity and vanishing theorems on the equivariant $K$-theory level for the Witten type operators on String$^c$ manifolds introduced by Chen-Han-Zhang.
description: arXiv admin note: substantial text overlap with arXiv:1104.3972, and with arXiv:math/0001014, arXiv:math/9912108 by other authors
"Art gave lifeless life": living art and the nature of fiction in early modern England
Creators: name: Gildea, Tara
Publisher: name: No Publisher Supplied
Year: 2020

description: What can representations of intense experiences of the imagination—the feeling that poems, books, paintings, and statues are alive—tell us about the status of fictional entities in the early modern period? How does the dominant narrative of poetry as mimesis change when we take into consideration the era’s fixation with animated art? My dissertation claims that the early modern fascination with what I call “living art” made it possible to articulate a nascent form of aesthetic experience and a theory of fiction. Early modern literary texts offer complex meditations on how readers emotionally identify with imaginative worlds even though they lacked a name or aesthetic category to describe these feelings. Because the early modern period lacks the art criticism that was common in the eighteenth century, I read the ways that literature theorizes its own practice and effects, arguing that literature produces some of the most complex portraits of aesthetic experiences and should be considered on par with philosophical treatises. I take seriously the early modern claim that living art feels actual in order to explore whether the intensity of aesthetic experience leads to a level of instantiation or actuality that goes beyond representation or fictional reference. Each chapter considers whether literature or art requires actualization in order to materially transform issues from gender to politics. This dissertation, then, looks forward to theories of performativity and to theories of aesthetics that are amenable to a performative perspective. While the texts I examine here anticipate theories of linguistic performativity, this dissertation suggests that early modern writers were not restricted to language as a conduit for action. Instead, I argue that a character’s aesthetic experience with the art form activates and reinforces performativity and can be constituted through the process of aesthetic experience. For early modernists, art and literature seem alive not because they represent reality but because they are active forces in the world.
A Nonprofit Approach to Event and Team-based Language Documentation and Revitalization in North America
Creators: name: Dorothea Hoffmann
name: Abbie Hantgan-Sonko
name: Wilhelm Meya
Publisher: name: Zenodo
Year: 2022
Subjects: linguistics
language documentation
nonprofit

description: A Nonprofit Approach to Event and Team-based Language Documentation and Revitalization in North America

Dorothea Hoffmann, Abbie Hantgan-Sonko & Wilhelm Meya

Presented 6 October 2022 at the Berlin-Brandenburg Academy of Sciences and Humanities at the Conference Where Do We Need to Go From Here? - Language Documentation and Archiving,  in the UNESCO International Decade of Indigenous Languages
Hepatitis B Virus (HBV) Infection in Peripheral Blood Mononuclear Cells of HBV Mono-infected and HBV/Human Immunodeficiency Virus Type-1 Co-infected Patients
Creators: name: Lee, Zengina
Publisher: name: Graduate Studies
Year: 2014
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: Health Care Management
subject: Immunology
subject: FOS: Clinical medicine
subject: chronic HBV
subject: human immunodeficiency virus
subject: peripheral blood mononuclear cell
subject: PBMC subsets
subject: lymphotropism

description: It is unknown whether HIV-1 co-infection impacts HBV lymphotropism. We hypothesize that concomitant HIV-1 infection will affect HBV detection in PBMC subsets. We compared HBV genome detection in whole PBMC and CD4+ T, CD8+ T, CD14+ monocyte, CD19+ B and CD56+ NK cell subsets isolated from 14 HBV mono-infected (4/14 with a second sample collected after starting antivirals) and 6 HBV/HIV-1 co-infected patients on antivirals using nested PCR/nucleic hybridization and/or quantitative PCR assays. HBV DNA was detected in most target PBMC subsets regardless of HIV-1 co-infection and antiviral treatment; with the exception of the CD4+ T cell subset from HBV/HIV-1 + patients. All whole PBMC analyzed (13/13 HBV treatment naïve mono-infected, 4/4 follow-up cases on antivirals, and 3/3 HBV/HIV-1 co-infected) were HBV genome positive. The data suggests that HBV infection in CD4+ T cells is affected by concomitant HIV-1 infection.
Social-Emotional Processing and Bullying Behaviour
Creators: name: Pugliese, Gia Veronica
Publisher: name: Graduate Studies
Year: 2014
Subjects: subject: Educational Psychology
subject: Bullying
subject: Empathy
subject: Facial Affect Recognition
subject: Aggression

description: Bullying is a prevalent form of aggressive behaviour that is associated with negative social, emotional, and educational outcomes for children involved in bullying and victimization. Prevalence and negative outcomes associated with bullying has lead researchers to examine potential individual characteristics associated with bullying that can guide prevention and intervention efforts. While the relation between poorer empathy and facial affect recognition and aggressive behaviour is well documented, few studies have examined these individual characteristics and bullying behaviour. Moreover, research to date presents conflicting results, making it difficult to form conclusions and inform practice. Differing methods across studies and limited inclusion of different types of bullying (i.e., physical and relational) and different associated roles (i.e., bully-victim) likely explain conflicting results. Building upon these limitations, this study explored relations between affective empathy, facial affect recognition, and bullying behaviour in a sample of Canadian children. A total of 192 children in grades four to six participated in this study. Females were found to report significantly higher affective empathy than males, and higher facial affect recognition accuracy was associated with higher affective empathy scores in males only. Involvement in more frequent bullying and bully- victimization was associated with poorer affective empathy in females only. Further analysis indicated that for females poorer affective empathy predicted more frequent bullying and bully- victimization. Results of this study are discussed in terms of theoretical, empirical, and practical implications. The strengths and limitations of this study are also discussed and directions for future research are presented.
The Flat Transmission Spectrum of the Super-Earth GJ1214b from Wide Field Camera 3 on the Hubble Space Telescope
Creators: name: Berta, Zachory K.
name: Charbonneau, David
name: Désert, Jean-Michel
name: Kempton, Eliza Miller-Ricci
name: McCullough, Peter R.
name: Burke, Christopher J.
name: Fortney, Jonathan J.
name: Irwin, Jonathan
name: Nutzman, Philip
name: Homeier, Derek
Publisher: name: arXiv
Year: 2011
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Capitalizing on the observational advantage offered by its tiny M dwarf host, we present HST/WFC3 grism measurements of the transmission spectrum of the super-Earth exoplanet GJ1214b. These are the first published WFC3 observations of a transiting exoplanet atmosphere. After correcting for a ramp-like instrumental systematic, we achieve nearly photon-limited precision in these observations, finding the transmission spectrum of GJ1214b to be flat between 1.1 and 1.7 microns. Inconsistent with a cloud-free solar composition atmosphere at 8.2 sigma, the measured achromatic transit depth most likely implies a large mean molecular weight for GJ1214b's outer envelope. A dense atmosphere rules out bulk compositions for GJ1214b that explain its large radius by the presence of a very low density gas layer surrounding the planet. High-altitude clouds can alternatively explain the flat transmission spectrum, but they would need to be optically thick up to 10 mbar or consist of particles with a range of sizes approaching 1 micron in diameter.
description: 17 pages, 12 figures, accepted for publication in ApJ