cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Chemical and kinematical properties of BSSs and HB stars in NGC 6397
Creators: name: Lovisi, L.
name: Mucciarelli, A.
name: Lanzoni, B.
name: Ferraro, F. R.
name: Gratton, R.
name: Dalessandro, E.
name: Ramos, R. Contreras
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We used three sets of high-resolution spectra acquired with the multifiber facility FLAMES at the Very Large Telescope of the European Southern Observatory to investigate the chemical and kinematical properties of a sample of 42 horizontal branch (HB) stars, 18 Blue Straggler Stars (BSSs) and 86 main sequence turn-off and sub-giant branch stars in the nearby globular cluster NGC 6397. We measured rotational velocities and Fe, O and Mg abundances. All the unevolved stars in our sample turn out to have low rotational velocites (v sin i< 10\kms), while HB stars and BSSs show a broad distribution, with values ranging from 0 to 70 \kms. For HB stars with T<10500 K there is a clear temperature-oxygen anti-correlation, that can be understood if the star position along the HB is mainly determined by the He content. The hottest BSSs and HB stars (with temperatures T>8200 K and T> 10500 K, respectively) also show significant deviations in their iron abundance with respect to the cluster metallicity (as traced by the unevolved stars, [Fe/H]=-2.12). While similar chemical patterns have been already observed in other hot HB stars, this is the first evidence ever collected for BSSs. We interprete these abundance anomalies as due to the metal radiative levitation, occurring in stars with shallow or no convective envelopes.
Real Equivariant Bordism for elementary abelian 2-groups
Creators: name: Firsching, Moritz
Publisher: name: arXiv
Year: 2012
Subjects: subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics
subject: 57R85 (Primary) 55N91 (Secondary)

description: We give a description of real equivariant bordism for elementary abelian 2-groups, which is similar to the description of complex equivariant bordism for the group S^1 x ... x S^1 given by Hanke in 2005.
description: 21 pages
The Faculty Development Needs and Teaching Motivations, Enjoyment, and Challenges of Veterinary Preceptors: A Mixed Methods Study
Creators: name: Hashizume, Cary
Publisher: name: Graduate Studies
Year: 2016
Subjects: subject: Education--Teacher Training
subject: Veterinary Science
subject: Needs Assessment
subject: Veterinary medicine
subject: Preceptor
subject: Faculty development
subject: Distributed clinical education

description: Objective: To determine the faculty development needs and teaching motivations, enjoyment, and challenges of veterinary preceptors in Alberta, Canada. Methods: A mixed methods approach was used; data was collected from preceptors via a questionnaire completed by 101 veterinarians and 17 telephone interviews. Quantitative data were analyzed via t-tests and one way analysis of variance. Qualitative data underwent thematic content analysis. Results: Preceptors’ learning needs included balancing clinical workload with teaching, assessing student performance, and engaging and motivating students. Preceptors are motivated by a sense of obligation to the profession and desire to maintain competence. While preceptors enjoy observing learners’ professional development, time management challenges and disinterested learners detract from their satisfaction of teaching. Conclusions: A mixed methods design identified and elaborated on learning needs of veterinary medicine preceptors as well as their motivations, enjoyment and challenges. These data can be used to inform faculty development programming and support veterinary preceptors.
Study of the magnetic properties of URu2Si2 under uniaxial stress by neutron scattering
Creators: name: Bourdarot, Frederic
name: Martin, Nicolas
name: Raymond, Stephane
name: Regnault, Louis-Pierre
name: Aoki, Dai
name: Taufour, Valentin
name: Flouquet, Jacques
Publisher: name: arXiv
Year: 2011
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The aim of this study is to compare the magnetic behavior of URu2Si2 under uniaxial stress along the a-axis with the behavior under hydrostatic pressure. Both are very similar, but uniaxial stress presents a critical stress σxa smaller (0.33(5)GPa) than the hydrostatic critical pressure px =0.5 GPa where the ground state switches from HO (hidden order) to AF (antiferromagnetic) ground state. From these critical values and from Larmor neutron diffraction (LND), we conclude that the magnetic properties are governed by the shortest U-U distance in the plane (a lattice parameter). Under stress, the orthorhombic unit cell stays centered. A key point shown by this study is the presence of a threshold for the uniaxial stress along the a-axis before the appearance of the large AF moment which indicates no-mixture of order parameter (OP) between the HO ground state and the AF one as under hydrostatic pressure. The two most intense longitudinal magnetic excitations at Q0=(1,0,0) and Q1=(0.6,0,0) were measured in the HO state: the excitation at Q0 decreases in energy while the excitation at Q1 increases in energy with the uniaxial stress along the a-axis. The decrease of the energy of the excitation at Q0 seems to indicate a critical energy gap value of 1.2(1) meV at σxa. A similar value was derived from studies under hydrostatic pressure at px.
description: 22 pages, 10 figures, submitted to PRB
El futuro del Estado del Bienestar
Creators: name: Viguera Espejo, Luis
Publisher: name: Quaderns de Polítiques Familiars
Year: 2021

description: Este artículo es una reflexión personal sobre el futuro de nuestro Estado del Bienestar. En este debate, frecuentemente politizado, deberíamos respetar el principio de que los temas técnicos los deberían resolver, al menos en primera instancia, los especialistas. En primer lugar, antes de crecer en presupuesto, cosa que ahora no podemos, deberíamos revisar otros aspectos siempre pensando en clave de futuro y con el objetivo de hacer las cosas mejor, para así, acabar necesitando en el futuro menos recursos adicionales. No se trata de “poner más dinero sobre la mesa” y luego pensar. Nuestro Estado del Bienestar ha crecido más rápido que el de muchos otros países con los que nos comparamos habitualmente. Cualquier gestor, ya sea público o privado, con algo de experiencia, sabe que los crecimientos presupuestarios veloces y de elevada magnitud suelen conllevar problemas de eficiencia de forma casi inevitable. Por eso, es importante recordar que siempre ha resultado más sencillo y barato, crecer bien que reformar o reestructurar después. Aunque no es bueno ampararnos en el conocido: “mal de muchos…”, sí nos puede ayudar el considerar que casi todos los países de nuestro entorno -con diversos niveles relativos de riqueza y gasto social, afrontan importantes retos en relación a sus sistemas de protección.
description: Quaderns de Polítiques Familiars, Núm. 2 (2016): La Familia en la Ley de Dependencia
Evolución de los modelos de protección de la dependencia
Creators: name: Baviera Puig, Inmaculada
Publisher: name: Quaderns de Polítiques Familiars
Year: 2021

description: La protección de la dependencia constituye una cuestión social y humana de ámbito global, que ha experimentado un incremento significativo a consecuencia del envejecimiento demográfico general. Por ello ha sido abordado por las principales instituciones internacionales: Naciones Unidas, Consejo de Europa y la Unión Europea. En las últimas décadas se han adoptado diferentes soluciones a la protección de la dependencia en función del sistema jurídico, del modelo de estado de bienestar y cultural en los distintos países europeos. En términos generales se observa una tendencia a mantener a las personas en situación de dependencia en sus propios domicilios y a apoyar al familiar cuidador.
description: Quaderns de Polítiques Familiars, Núm. 2 (2016): La Familia en la Ley de Dependencia
Building Collaborative Capacity: A Case Study
Creators: name: Mulholland, Barbara Jean
Publisher: name: Graduate Studies
Year: 2016
Subjects: subject: Education--Administration
subject: collaborative process
subject: school district leadership
subject: complexity theory
subject: social capital

description: The purpose of this descriptive, single case study was to examine the collaborative processes used in one Alberta school jurisdiction’s C2 committee, a provincially mandated committee tasked with finding ways to reduce teacher workload. A critical literature review examined several key areas, including collaborative processes in organizations, school districts and educational change, and teacher workload and teacher efficacy. Data collection included semi-structured participant interviews, document analysis, and field observation. This data, along with the literature, was used to answer the primary research question: “How might the collaborative processes used in a C2 committee be a prototype for the building of system capacity leading to systemic change?” The data were analyzed iteratively in relation to the conceptual framework, and resulted in five main findings. The findings of the study highlight the importance of the local nature of the process, the impact of leadership, the impact of culture, an enhanced understanding of teacher workload and teacher efficacy, and the connection between the collaborative process and organizational learning. These findings were analyzed and interpreted with the literature, resulting in a conceptualization of the collaborative process as integral to the development of social capital in a complex, networked system. Collaborative processes characterized by trust, communication, relationships, and influenced by leadership strengthen the network structure of the school district and build social capital for individuals and for the system. The knowledge gained from this study will help inform the processes and the leadership capacity required as school jurisdictions are expected to conduct their work in increasingly collaborative contexts.
Desarrollo en la temprana infancia: nuevo marco conceptual
Creators: name: De Bofarull, Ignasi
Publisher: name: Quaderns de Polítiques Familiars
Year: 2021

description: Si en el siglo XX las enfermedades y deficiencias –en el entorno pediátrico y familia- del niño estaban focalizados en las infecciones y las vacunas, la nutrición y la higiene, en estos primeros lustros del siglo XXI a estos problemas de salud se han sumado otro tipo de trastornos y enfermedades. La neurociencia, la biología, la pediatría han puesto de manifiesto que existen una nuevas situaciones socio-familiares que afectan a los niños, sobre todo en los primeros años de vida, que pueden menoscabar determinados planos de la salud que repercuten en el desarrollo, el comportamiento, o los progresos cognitivos y educativos del niño. Estos años son muy sensibles en el plano cerebral (Figura.1) y la ausencia de una buena estimulación y de una adecuada relación afectiva con los progenitores puede afectar al desarrollo del cerebro en el plano de las conexiones neuronales, en las fundamentales sinapsis que ahora tienen lugar.
description: Quaderns de Polítiques Familiars, Núm. 1 (2015): 25 aniversario de la Convención de los Derechos del Niño
Topological Insulator Magnetic Tunnel Junctions: Quantum Hall Effect and Fractional Charge via Folding
Creators: name: Meng, Qinglei
name: Vishveshwara, Smitha
name: Hughes, Taylor L.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We provide a characterization of tunneling between coupled topological insulators in 2D and 3D under the influence of a ferromagnetic layer. We explore conditions for such systems to exhibit integer quantum Hall physics and localized fractional charge, also taking into account interaction effects for the 2D case. We show that the effects of tunneling are topologically equivalent to a certain deformation or folding of the sample geometry. Our key advance is the realization that the quantum Hall or fractional charge physics can appear in the presence of only a \emph{single} magnet unlike previous proposals which involve magnetic domain walls on the surface or edges of topological insulators respectively. We give illustrative topological folding arguments to prove our results and show that for the 2D case our results are robust even in the presence of interactions.
description: 5 pages, 2 figures
Three-Point Correlator of Heavy Vertex Operators for Circular Winding Strings in AdS5xS5
Creators: name: Ryang, Shijong
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider an exremal three-point correlator of three heavy vertex operators for the circular winding string state with one large spin and one windining number in AdS5 and one large spin and one winding number in S5. We use a Schwarz-Christoffel transformation to compute semiclassically the extremal three-point correlator on a stationary string trajectory which is mapped to the complex plane with three punctures. It becomes a 4d conformal invariant three-point correlator on the boundary. We discuss the marginality condition of vertex operator.
description: 14pages, LaTeX, no figures, minor correction added
Observations of Mg II Absorption Near z ~ 1 Galaxies Selected From The DEEP2 Redshift Survey
Creators: name: Lovegrove, Elizabeth
name: Simcoe, Robert A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We study the frequency of Mg II absorption in the outer haloes of galaxies at z = 0.6 - 1.4 (with median z = 0.87), using new spectra obtained of ten background quasars with galaxy impact parameters of b < 100 kpc. The quasar sightlines were selected from the SDSS DR6 QSO catalog based on proximity to galaxies in the DEEP2 redshift survey. In addition to the 10 small impact systems, we examine 40 additional galaxies at 100 < b < 500 kpc serendipitously located in the same fields. We detect Mg II absorbers with equivalent width W_r = 0.15 A - 1.0 A, though not all absorbers correlate with DEEP galaxies. We find five unique absorbers within Δv = 500 km/s and b < 100 kpc of a DEEP galaxy; this small sample contains both early and late type galaxies and has no obvious trends with star formation rate. No Mg II is detected more than 100 kpc from galaxies; inside this radius the covering fraction scales with impact parameter and galaxy luminosity in very similar fashion to samples studied at lower redshift. In all but one case, when Mg II is detected without a spectroscopically confirmed galaxy, there exists a plausible photometric candidate which was excluded because of slit collision or apparent magnitude. We do not detect any strong absorbers with W_r > 1.0 A, consistent with other samples of galaxy-selected Mg II systems. We speculate that Mg II systems with 0.3 < W_r < 1.0 trace old relic material from galactic outflows and/or the halo assembly process, and that in contrast, systems with large W_r are more likely to reflect the more recent star forming history of their associated galaxies.
description: 19 pages, 19 figures, accepted to ApJ; v2 fixed minor errors
The Characterization of Common Cardiovascular Flow Regimes Using Newtonian and Non-Newtonian Fluids
Creators: name: Walker, Andrew
Publisher: name: Engineering
Year: 2013
Subjects: subject: Engineering--Biomedical
subject: hydroxyethyl starch
subject: Newtonian fluid
subject: non-Newtonian fluid
subject: Particle Image Velocimetry
subject: echo particle image velocimetry
subject: transitional flow
subject: flow separation
subject: Wall Shear Stress

description: This thesis consists of three projects with the enveloping theme devoted to the characterization of common cardiovascular flow regimes using Newtonian and non-Newtonian fluids. The viscous behaviour of hydroxyethyl starch (HES) fluids available in Canada to treat hypovolemia remains unknown. The first project characterized the viscosity of these fluids using capillary viscometry and pressure drop measurements. The viscosities of HES 130/0.4 (Voluven®, Volulyte®) and HES 260/0.45 (Pentaspan®) were less than and greater than blood respectively. HES 130/0.4 (Voluven®) at 100% concentration unexpectedly displayed shear thickening behaviour at high flow rates. HES fluids were subsequently diluted in a blood analog fluid of aqueous xanthan gum. As expected, both HES 130/0.4 fluids decreased the analog viscosity while HES 260/0.45 increased analog viscosity and no evidence of previous shear thickening was found. Variability in viscous behaviour suggests changes in the molecular composition between batches. The non-Newtonian behaviour of blood is often ignored in cardiovascular flow modelling. To address the importance of non-linear rheology, flow patterns were experimentally measured using Newtonian and non-Newtonian blood analog fluids in separated flow environments. Flow induced by a Gianturco Z-stent showed that Newtonian assumptions underestimated wall shear stress (WSS) while expanding recirculation and oscillatory shear. This suggested that linear viscous assumptions overestimated the risk of intimal hyperplasia. In transitional flow induced by a stenosis, the non-Newtonian fluid extended laminar flow behaviour while damping turbulent shear stress. Conversely, the Newtonian fluid displayed downstream shear layer break-up and a radial expansion in elevated turbulent shear stress at the distal end of the field of view at peak pulsatile flow. Translation to the measurement of separated flow in vivo requires imaging in opaque environments. Echo particle image velocimetry (Echo PIV) has presented itself as an attractive tool; however, application to stenotic flows has been minimal. Echo PIV measured centerline velocities showed a good fit to PIV; however, failure to accurately resolve near wall flow patterns suggested further refinement is necessary prior to its use as a reliable quantitative imaging tool in such environments.
Buying Up the Semi-Periphery: Spain’s Economy of ‘Golden Visas’
Creators: name: Holleran, Max
Publisher: name: Taylor & Francis
Year: 2019
Subjects: subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: Cancer
subject: Science Policy

description: After the 2008 crisis, Spain forged new economic connections with Asia as relations with EU core countries soured, including a programme called ‘golden visas’ that offers EU visas, and eventual citizenship, linked to purchasing second homes. Southern European countries with housing gluts, sovereign debt, austerity measures, and aging populations embraced these programmes while discouraging the migration of refugees. Using research with potential Asian property purchasers, this article shows that those seeking visas are not only motivated by political conditions in their home countries but they also seek to ‘buy into’ the European social model. Home-purchasers see their investment as a means to cheaply access state services unavailable in their countries and they make longsighted geopolitical predictions through the purchasing of homes and the visas that come with them.
Viscoelastic imaging methods using acoustic radiation force
Creators: name: Frew, Samuel Mark
Publisher: name: University of British Columbia
Year: 2010

description: Elastography is a method of imaging the viscoelastic properties of soft tissue and similar media. It can be used for identifying various forms of cancer and fibrosis in soft tissue. Elastography can thus aid in diagnosis of such diseases, and in treatment procedures, such a biopsy needle guidance. Acoustic radiation force (ARF) imaging is one form of elastography whereby the ARF of focused ultrasound displaces the medium at an internal, localised position. The same ultrasound system can be used to monitor the displacement, from which the viscoelastic properties can be recovered. This work presents a new ARF imaging method, called axial relaxation imaging, that uses transfer function techniques. The relaxation response at a point in the medium is monitored after a period of ARF application. By assuming the response corresponds to a negative step response of a linear system, the relative force-displacement transfer function is computed. This is then related to a Voigt model over a range of frequencies to obtain a relative elastic parameter and a frequency-dependent viscous parameter governed by a power law. The method was applied to homogeneous phantoms made with different gelatine concentrations. Relative elastic parameters of 1, 2.3 and 4.4 and relative viscous parameters of 1, 1.8 and 3.0 were obtained for 2, 3 and 4 wt% gelatine concentrations, respectively, with consistent results between phantoms of the same type and agreement with values from other estimation techniques. The viscous power law frequency dependencies were governed by flow index values of –0.10, –0.14 and –0.18, respectively. The good separation between parameters in the results shows the method holds potential for application to tissue characterisation.
A search for massive young stellar objects towards 98 CH$_{3}$OH maser sources
Creators: name: Liu, Tie
name: Wu, Yue-Fang
name: Wang, Ke
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Using the 13.7 m telescope of Purple Mountain Observatory (PMO), a survey of J=1-0 lines of CO and its isotopes was carried out towards 98 methanol maser sources in January 2008. Eighty-five sources have infrared counterparts within one arcmin. In the survey, except 43 sources showing complex or multiple-peak profiles, almost all the $^{13}$CO line profiles of the other 55 sources have large line widths of 4.5 km s$^{-1}$ on average and are usually asymmetric. Fifty corresponding Infrared Astronomical Satellite (IRAS) sources of these 55 sources are with $L_{bol}$ larger than $10^{3}L_{\odot}$, which can be identified as possible high-mass young stellar sources. Statistics show that the $^{13}$CO line widths correlate with the bolometric luminosity of the associated IRAS sources. We also report the mapping results of two sources: IRAS 06117+1350 and IRAS 07299-1651 here. Two cores were found in IRAS 06117+1350 and one core was detected in IRAS 07299-1651. The northwest core in IRAS 06117+1350 and the core in IRAS 07299-1651 can be identified as precursors of UC\simH{\sc ii} regions or high-mass protostellar objects (HMPOs). The southeast core of IRAS 06117+1350 has no infrared counterpart, seeming to be on younger stages than pre-UC\simH{\sc ii} phase.
description: A search for massive young stellar objects. Accepted to RAA in 2010
Vulnerabilidad y ética del cuidado. El papel de la familia
Creators: name: Zárate Rivero, Belén
name: Gas Aixendri, Montserrat
Publisher: name: Quaderns de Polítiques Familiars
Year: 2021

description: La vulnerabilidad es una cuestión que puede abordarse desde diferentes perspectivas. En este trabajo abordaremos esta temática desde la óptica de la Filosofía del Derecho. En algún trabajo anterior hemos tenido ocasión de tratar sobre las relaciones familiares y el cuidado o más bien sobre la “ética del cuidado”. El punto de partida del tema que nos proponemos tratar es el siguiente: ser vulnerable significa estar necesitado de cuidado y a la vez el ámbito donde el ser humano necesita ser cuidado es la familia. La familia es el lugar donde se cuida de todos. Y por eso gran parte de la actividad en la familia se centra, en definitiva, en cuidar de sus miembros. La primera cuestión de la que es necesario hablar se refiere a algo que aparentemente no tiene mucho que ver con el tema planteado y es la consideración del tiempo, es decir, de la dimensión temporal del ser humano. Es algo superfluo decir que estamos sometidos al tiempo. Pero qué implica exactamente esta realidad? La dimensión temporal es un rasgo esencial del ser humano. Nuestra vida es continuidad y desarrollo, se va realizando por etapas que los hombres diferenciamos. La propia sociedad se estructura sobre las edades de sus miembros; es así como a media mañana de un día corriente es perfectamente visible que unos están en su etapa de formación y por tanto están en instituciones educativas, otros se ocupan de sus trabajos y del mantenimiento del hogar, y los mayores y más pequeños ocupan los parques intentando aprovechar el sol de mediodía.
description: Quaderns de Polítiques Familiars, Núm. 1 (2015): 25 aniversario de la Convención de los Derechos del Niño
The Role of PIK3CA in Cisplatin Resistance of Cervical Cancer
Creators: name: Merry, Cole
Publisher: name: Graduate Studies
Year: 2016
Subjects: subject: Biology--Cell
subject: Biology--Molecular
subject: Oncology
subject: Cervical cancer
subject: cisplatin
subject: Radiation
subject: GDC-0941
subject: drug resistance
subject: chemoradiotherapy
subject: HPV
subject: PIK3CA
subject: PI3K
subject: E545K
subject: AKT
subject: PIP3

description: Cervical cancer is a significant public health issue. A recent study (McIntyre et al; 2013) suggested that phosphatidyl inositol 3 kinase (PI3K) catalytic subunit α (PIK3CA) is an important marker for the prognosis of cervical cancer patients treated with chemoradiotherapy (CRT), with PIK3CA-mutant tumour bearing patients having poorer survival than PIK3CA-wt patients. Activating mutations in PIK3CA promote increased PI3K signalling, and tumorigenesis in vivo. I investigated the role that E545K, identified by McIntyre et al (2013) as the most common mutation in PIK3CA in cervical cancer, may play in radiation and cisplatin resistance of cervical cancer cell lines. This study indicated a potential role of PIK3CA in cisplatin resistance, although cisplatin resistance was not a universal characteristic of cells expressing PIK3CA-E545K, and was not reversed with the use of the PI3K inhibitor GDC-0941. The cisplatin resistant cell line showed sensitivity to GDC-0941, suggesting PI3K inhibitors as an alternative to cisplatin.
Minimal instances for toric code ground states
Creators: name: Lang, Nicolai
name: Büchler, Hans Peter
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A decade ago Kitaev's toric code model established the new paradigm of topological quantum computation. Due to remarkable theoretical and experimental progress, the quantum simulation of such complex many-body systems is now within the realms of possibility. Here we consider the question, to which extent the ground states of small toric code systems differ from LU-equivalent graph states. We argue that simplistic (though experimentally attractive) setups obliterate the differences between the toric code and equivalent graph states; hence we search for the smallest setups on the square- and triangular lattice, such that the quasi-locality of the toric code hamiltonian becomes a distinctive feature. To this end, a purely geometric procedure to transform a given toric code setup into an LC-equivalent graph state is derived. In combination with an algorithmic computation of LC-equivalent graph states, we find the smallest non-trivial setup on the square lattice to contain 5 plaquettes and 16 qubits; on the triangular lattice the number of plaquettes and qubits is reduced to 4 and 9, respectively.
description: 14 pages, 11 figures
The Effects of a Sad Mood Induction on Attention Disengagement from Emotional Images in Remitted and Never Depressed Women
Creators: name: Korol, Stephanie
Publisher: name: Graduate Studies
Year: 2016
Subjects: subject: Psychology--Clinical
subject: Psychology--Cognitive
subject: Depression
subject: Attention disengagement
subject: Eye-tracking
subject: Mood induction

description: Research suggests that depressed individuals experience more difficulty disengaging attention from negative information (e.g., Everaert et al., 2012; Joormann & D’Avanzato, 2010; Koster, et al., 2011), although not all studies have reached this conclusion (e.g., Karparova et al., 2005; Wisco et al., 2012). In the present study, differences in attention disengagement were examined in currently, remitted, and never depressed women. Eighty participants completed an attention disengagement task while viewing emotional images. The time taken to shift their gaze away from the image was used as the measure of attention disengagement. For remitted and never depressed women, the disengagement task was completed before and after a sad mood induction (MI). Currently depressed participants were not found to disengage more slowly from negative images than never depressed participants. There was evidence that the sad MI affected disengagement for the remitted depressed participants who were most affected by the sad MI. The implications of these findings are discussed.
Influence of Reservoir Geological Characteristics on Fracturing Fluid Flowback
Creators: name: Wang, Qiaohong
Publisher: name: Graduate Studies
Year: 2017
Subjects: subject: Geology
subject: FOS: Earth and related environmental sciences
subject: Flowback
subject: geological characteristics
subject: unconventional oil and gas reservoirs
subject: fracture
subject: reservoir lithology
subject: formation pressure
subject: wettability

description: Fracturing fluid flowback is a principal process in the successful development of unconventional oil and gas reservoirs. When a flowback rate is low the fracturing fluid remains in a reservoir, causing damage to the reservoir and impacting the oil and gas capacity during the development stage. The current study of the factors that affect a flowback rate of a fracturing fluid is poor. This thesis is focused on an impact study of the reservoir geological characteristics on the fracturing fluid flowback. The roles of reservoir lithology, physical properties, formation pressure, fracture development, and wettability on fracturing fluid flowback are analyzed. The conclusions are expected to serve as a reference for further development of shale oil and gas reservoirs. After the simulation work, we conclude that when the formation pressure is higher, the total flowback rate increases; for reservoir wettability, the less water wet the reservoir is, the more the total flowback rate has. The influence of fracture development is diversified; a fracture location will determine whether it becomes promotion or resistance to the fracture fluid flowback process.
El acogimiento familiar, notas sobre el artículo 173 bis del código civil
Creators: name: Abad Arenas, Encarnación
Publisher: name: Quaderns de Polítiques Familiars
Year: 2021

description: El acogimiento familiar es una medida que fue introducida en nuestro país por la Ley 21/1987, de 11 de noviembre, modificó determinados artículos del Código civil y de la Ley de Enjuiciamiento Civil en materia de adopción. La pretensión era instaurar un nuevo sistema de protección infantil y configurar aquella situación que produce la plena participación del menor en la vida de familia imponiendo a quien lo recibe las obligaciones de velar por él, tenerlo en su compañía, alimentarlo, educarlo y procurarle una formación integral.
description: Quaderns de Polítiques Familiars, Núm. 1 (2015): 25 aniversario de la Convención de los Derechos del Niño
Transcriptome Dynamics Over a Lunar Cycle in Acropora humilis
Creators: name: Oldach, Matthew J.
Publisher: name: Graduate Studies
Year: 2016
Subjects: subject: Bioinformatics
subject: FOS: Computer and information sciences
subject: Ecology
subject: FOS: Biological sciences
subject: Genetics
subject: Biology--Molecular
subject: coral
subject: chronobiology
subject: circalunar
subject: moonlight
subject: biological rhythm
subject: circadian rhythm
subject: broadcast spawning

description: The cycle of the moon serves as a cue for the reproduction of many species of corals, with many species spawning in the evening a few days following a full moon. Yet, little is known about the molecular mechanisms that allow corals to perceive moonlight and use this information for reproductive timing. To improve our understanding, short-read sequencing was used to assemble, de novo, the transcriptome of the coral Acropora humilis and identify differential patterns of gene expression in the month preceding spawning. Analysis revealed a number of biological processes that change over the lunar month including energy metabolism, skeletal deposition and translation. Furthermore, a number of circadian clock genes shift their expression over the lunar month suggesting a potential mechanism that corals may use detect moonlight and trigger a biochemical cascade that culminates in gamete release following the full moon.
The effect of confinement on stochastic resonance in continuous bistable systems
Creators: name: Rana, Shubhashis
name: Lahiri, Sourabh
name: Jayannavar, A. M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Using the input energy per cycle as a quantifier of stochastic resonance (SR), we show that SR is observed in superharmonic (hard) potentials. However, it is not observed in subharmonic (soft) potentials, even though the potential is bistable. These results are consistent with recent observations based on amplitude of average position as a quantifier. In both soft and hard potentials, we observe resonance phenomenon as a function of the driving frequency. The nature of probability distributions of average work are qualitatively different for soft and hard potentials.
description: 7 pages, 11 figures
Automatic Operation of a Stand-Alone Hybrid Power System with Frequency Regulation by Fuzzy Logic and Binary Control
Creators: name: Manjarres, Pamela Astrid
Publisher: name: Graduate Studies
Year: 2013
Subjects: subject: Electronics and Electrical
subject: hybrid power system
subject: Frequency Regulation
subject: Fuzzy Logic

description: Hybrid power systems must be self-sufficient in terms of frequency and voltage control due to their islanded operation. A control strategy to combine the operation of a wind generator, a diesel generator, a battery energy storage system and a dump load for frequency regulation is proposed in this thesis. The proposed strategy partitions the control task into two subtasks: a) choosing the element to be operated on, b) providing frequency regulation. A global controller, based on an IF-THEN inference engine, chooses the element to operate. The frequency regulation is provided by separate individual controllers. In this thesis, a hybrid power system has been modelled and the proposed control strategy has been tested. By monitoring the system's power management and frequency, it is shown that the proposed control strategy operates efficiently. The proposed strategy also reduces the number of measurements required and facilitates the integration of renewable energy sources.
La nueva ley de protección a la infancia: el acogimiento familiar ante el garantizo institucional
Creators: name: Santamaría, María Luisa
Publisher: name: Quaderns de Polítiques Familiars
Year: 2021

description: La nueva ley de protección a la infancia propone, como bien reconoce el apartado segundo de la exposición de motivos del proyecto, una reforma derivada de “una profunda revisión de las instituciones del sistema de protección a la infancia” (SPI) que engloba todo el conjunto de legislación y protocolos administrativos para proteger correctamente a la infancia. El citado sistema está formado por entidades públicas de ámbito local (diputaciones, consejos insulares o cabildos) que son responsables de que los niños de su territorio se encuentren debidamente protegidos y atendidos y de que sus derechos sean respetados en todo momento. En las garantías de los derechos infantiles intervienen también la Fiscalía y los juzgados especializados en Derecho de Familia que, por tanto, forman parte del sistema.
description: Quaderns de Polítiques Familiars, Núm. 1 (2015): 25 aniversario de la Convención de los Derechos del Niño
Development and Testing of Cardiovascular Quality Indicators for Rheumatoid Arthritis
Creators: name: Barber, Claire
Publisher: name: Graduate Studies
Year: 2015
Subjects: subject: Epidemiology
subject: Medicine and Surgery
subject: Quality Indicators
subject: Rheumatoid arthritis
subject: Cardiovascular Disease

description: Rheumatoid arthritis (RA) is an autoimmune inflammatory arthritis with a 50% increased risk of cardiovascular disease (CVD) related deaths. Traditional CVD risk factors including smoking, hypertension and diabetes may be under-identified and/or undertreated in RA, indicating a gap in care. Quality indicators (QIs) are an important tool for quality improvement and are lacking in this area. The objectives of this dissertation were to: (1) identify existing recommendations pertaining to screening and management of CVD risk in RA; (2) to develop a set of CVD QIs for RA based on the best practices; and (3) to test the QIs in clinical practice. A systematic review of existing CVD QIs and guidelines was conducted (Study 1). All CVD recommendations from high quality guidelines and relevant quality measures were abstracted and best practices in RA were identified. In Study 2, a panel of cardiologists and rheumatologists developed a set of CVD QIs for RA based on best the practices identified. The QIs were presented to an international panel of experts through a novel online modified Delphi process where they were rated and discussed over 3 rounds. In the final study, performance on the CVD QIs was evaluated in 170 early and biologic treated RA patients. Based on the process described above, 11 CVD QIs for RA were developed and were rated as highly relevant and valid by our international panel of experts. This was the first time the online platform was used for QI development and it demonstrated many advantages. Performance on the QIs from our cohort suggests under screening and inconsistent management of CVD risk factors. Also evident, was that our patients had a high burden of obesity, hypertension and smoking, suggesting this is a clinically meaningful gap in care. The primary area for future improvement was noted for QIs relating to communication of CVD risk and coordination of care between rheumatology and primary care. Therefore, future efforts should focus on improving coordination of CVD care as well as improving efficiency of QI measurement and reporting for timely and effective improvements in CVD care.
Experimental Simualtion Of Hot Fluid Injection Process for In-reservoir Upgrading
Creators: name: Coy Plazas, Luis Alejandro
Publisher: name: Graduate Studies
Year: 2013
Subjects: subject: Engineering--Petroleum
subject: Catalyst
subject: In-situ Upgrading
subject: Porous Meidum
subject: Vacuum Reidue

description: Nowadays, the industry recovers bitumen by injecting heat via steam to reduce bitumen’s viscosity in the reservoir so it flows easily to the surface. A high heat capacity fluid could eventually replace steam in this role. Vacuum Residue (VR) is the heaviest, most viscous and richest in contaminants amongst the different bitumen fractions, thus is the one deserving most upgrading, and it also has the highest heat capacity of oil fractions. The Centre for In Situ Energy at University of Calgary has proposed the use of VR to simultaneously recover and upgrade in situ, as it can be a carrier of heat but also of nano-dispersed catalysts and dissolved hydrogen into a reservoir which can enhanced upgrading. The design and construction of a new reactivity test unit for evaluating the injection of ultra-dispersed catalyst suspended on Athabasca vacuum residue (AVR) using dispersed hydrogen in sand pack media has been completed and extensively tested in this work. The deposition of the catalyst particles on the surface of the porous medium was studied and the amount of metal inside the reactor quantified. The results for catalytic evaluation showed a residue fraction conversion of up to 23 wt. %. Finally, the study of the injection of industrial VR and Athabasca bitumen to a porous medium with ultra-dispersed catalyst was carried out at typical reservoir conditions. The results showed a considerable improvement of the feedstock producing a conversion in the residue fraction of 32 wt. % and 15 wt.% respectively.
Artistry in Social Science Research
Creators: name: Dam, Shirley Cassandra
Publisher: name: Graduate Studies
Year: 2016
Subjects: subject: Art History
subject: Fine Arts
subject: Mass Communications
subject: Sociology
subject: FOS: Sociology
subject: Sociology--Theory and Methods
subject: Photography
subject: Hermeneutics
subject: Visual Communications
subject: Aesthetics
subject: Visual Research
subject: Practice Theory

description: This interpretive research study is an inquiry into social science researchers’ aesthetic practices in relation with photographic-based research practices. Specifically, it is an hermeneutic study that probes their experiences of practice careers and trajectories of practitioners in relation to expectations, traditions, and conventions of visual research communities. I explore through my conversations with five visual researchers from diverse social science disciplines the relevancy of aesthetics in evolving photographic research practices guided by philosophical hermeneutics and practice theory. Participants demonstrate that photographic-based research practices are messy, interdisciplinary, and complex because of the shared, entwined histories of photography, disciplinary traditions, and emerging aesthetic practices. The inquiry explores changing practices over time and space, creating a possible trajectory of aesthetic practice in photographic-based research practices. This trajectory is based on participants’ recollections of practice careers and literature about photography’s emergence into multiple histories across disciplines and fields and its ultimate establishment as a legitimate social science approach to data collection, analysis, and dissemination. It probes participants’ expectations, traditions, desires, and values of photographic-based research practices and relationships with aesthetic practices as their visual research careers evolved over time and space. Visual researchers face increasing complexity and challenges in their individual practices because of evolving shared practices. This includes their place(s) within visual research and disciplinary communities, borrowing from other disciplines, challenges to traditional expectations of collective practices, and their own desires to innovate and contribute to visual research methods. Aesthetic practices further complicate both individual and community practices, as aesthetics is still viewed by some practitioners as the domain of the arts and irrelevant to social science while others explore social worlds with aesthetic experience and expressions.
Convención de los derechos del niño
Creators: name: Lázaro, Carmen M.ª
Publisher: name: Quaderns de Polítiques Familiars
Year: 2021

description: La Convención de los Derechos del Niño (CDN) es un tratado que recoge, por un lado, principios rectores y derechos de la persona en general o dirigidos únicamente a los niños, que se hallaban dispersos en otros instrumentos internacionales; por otro, involucra en la protección de los menores no solo a sus padres u otras personas responsables, sino también a los Estados, exigiendo de estos la prestación de recursos y la interposición de medios para lograr los objetivos propuestos.
description: Quaderns de Polítiques Familiars, Núm. 1 (2015): 25 aniversario de la Convención de los Derechos del Niño
Law Firm Mergers Among Canadian Law Firms: The Effect on Lawyer Retention
Creators: name: Ho, Michael Oliver
Publisher: name: Graduate Studies
Year: 2016
Subjects: subject: Business Administration
subject: Economics--Labor
subject: Law
subject: FOS: Law
subject: Law
subject: Firm
subject: Merger
subject: Lawyer
subject: Retention
subject: Growth

description: Before the turn of the 20th century the Canadian legal environment experienced a surge in mergers of local law firms to form law firms with a national presence. More recently, instances of law firm mergers once again increased, this time on an international basis. Notwithstanding these trends, the general effect of law firm mergers on lawyer retention is unknown. The aim of this research is to collect the data necessary to analyze whether law firm mergers had any impact on lawyer retention at merged law firms. Using a 20-year sample of data collected specifically for this research growth rates were calculated and compared for 28 instances of mergers. Analysis of the data reveals that while there were similar trends between law firms that did merge and those that did not, law firms that participated in mergers generally had smaller growth rates than those law firms that did not merge.
Dimensional reduction and spacetime pathologies
Creators: name: Slobodov, Sergei
Publisher: name: University of British Columbia
Year: 2010

description: Dimensional reduction is a well known technique in general relativity. It has been used to resolve certain singularities, to generate new solutions, and to reduce the computational complexity of numerical evolution. These advantages, however, often prove costly, as the reduced spacetime may have various pathologies, such as singularities, poor asymptotics, negative energy, and even superluminal matter ﬂows. The ﬁrst two parts of this thesis investigate when and how these pathologies arise. After considering several simple examples, we ﬁrst prove, using perturbative techniques, that under certain reasonable assumptions any asymptotically ﬂat reduction of an asymptotically ﬂat spacetime results in negative energy seen by timelike observers. The next part describes the topological rigidity theorem and its consequences for certain reductions to three dimensions, conﬁrming and generalizing the results of the perturbative approach. The last part of the thesis is an investigation of the claim that closed timelike curves generically appearing in general relativity are a mathematical artifact of periodic coordinate identiﬁcations, using, in part, the dimensional reduction techniques. We show that removing these periodic identiﬁcations results in naked quasi-regular singularities and is not even guaranteed to get rid of the closed timelike curves.
El acogimiento en el marco del sistema legal de protección de menores
Creators: name: Martínez De Aguirre, Carlos
Publisher: name: Quaderns de Polítiques Familiars
Year: 2021

description: El acogimiento es una de las figuras de protección de menores contempladas en nuestro ordenamiento jurídico, para cuya cabal comprensión es preciso explicar su inserción en el sistema general de protección de menores. Eso incluye la descripción global del marco jurídico en que se inserta esta figura así como la indicación de los rasgos básicos de su actual regulación, a partir de los datos que ofrecen tanto el derecho común español como el derecho catalán. No se abordarán las previsiones de reforma legislativa en esta materia a nivel estatal –que si se desarrollan como está previsto afectarán directamente al acogimiento– por tener asignada esta cuestión una ponencia específica, en la que se desarrollarán con detalle.
description: Quaderns de Polítiques Familiars, Núm. 1 (2015): 25 aniversario de la Convención de los Derechos del Niño
«Los vinos andaluces en la Francia Ilustrada. Contribución a la antropología del buen gusto. », en F. Duhart y S. A. Corona Páez (ed.), Vinos de América y de Europa. Catorce miradas desde las ciencias del hombre, ParIs, Le Manuscrit, 2010, p. 249-258.
Creators: name: Duhart, Frédéric
Publisher: name: Zenodo
Year: 2010
Subjects: Anthropology of drinking
History of Wine Consumption
Wine Trade

description: Varios vinos andaluces (jerez, 'pacaret', 'tintilla de Rota...) fueron productos escogidos en Francia durante el siglo XVIII.