cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Modulation of pairing interaction in Bi$_2$Sr$_2$CaCu$_2$O$_{8+δ}$ by an O dopant: a density functional theory study
Creators: name: Foyevtsova, Kateryna
name: Kandpal, H. C.
name: Jeschke, Harald O.
name: Graser, S.
name: Cheng, H. -P.
name: Valentí, Roser
name: Hirschfeld, P. J.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Scanning tunneling spectroscopy measurements on the high temperature superconductor Bi$_2$Sr$_2$CaCu$_2$O$_{8+δ}$ have reported an enhanced spectral gap in the neighborhood of O dopant atoms. We calculate, within density functional theory (DFT), the change in electronic structure due to such a dopant. We then construct and discuss the validity of several tight binding (TB) fits to the DFT bands with and without an O dopant. With the doping-modulated TB parameters, we finally evaluate the spin susceptibility and pairing interaction within spin fluctuation theory. The d-wave pairing eigenvalues are enhanced above the pure system without O dopant, supporting the picture of enhanced local pairing around such a defect.
The stories nations tell : historical consciousness and the construction of national identity at the Canadian Museum for Human Rights
Creators: name: Anderson, Stephanie Blair
Publisher: name: University of British Columbia
Year: 2017

description: As Canada prepares for its 150th birthday, within the context of its colonial legacy, silenced histories, and multiple, shifting identities in the present, Canadian sites of pedagogy are confronting questions around whose national narratives they are communicating. Within this milieu, Canada recently (2014) inaugurated its sixth national museum, the Canadian Museum for Human Rights (CMHR), in Winnipeg, Manitoba. Using a theoretical frame that applied approaches within critical museology and historical consciousness, this investigation interrogated the CMHR as a site of pedagogy that could be read for its representational and spatial meanings, and as a site of historical consciousness that communicates a past, present, and future vision of Canada.   This research also introduced and utilized a Framework of Canadian National Narratives capturing current constructions of Canadian national identity. This framework identified two master national narrative templates—Master National Narrative Template 1.0 (the progressive, unified, Euro-Western colony-to-nation narrative of Canada), Master National Narrative Template 2.0 (Canada as a progress-oriented, generous, tolerant, multicultural mosaic)—and a third dimension titled Counter National Narratives 3.0, that is not a narrative template. Rather, NN 3.0 captures competing, or silenced aspects of Canadian history through national narratives that contest, rebuke or, intervene in the storylines of Master National Narrative Templates 1.0 and 2.0, thereby providing a more nuanced account and multiple perspectives on Canadian identity. In other instances, NN 3.0 throws into question taken-for-granted notions around the concepts of nationhood and national identity, through narratives grounded in land, place, or global forces. This study offers a new research approach for the identification, and analysis of national narratives in sites of pedagogy—classrooms, textbooks, monuments, national historic sites, museums, news media, architectural spaces, arbitrated cityscapes, Indigenous landscape features, and public performances. It suggests a new curricular imperative coined The Narrative Dimension for history education that might also be used in museology and public history. Part of The Narrative Dimension includes critical engagement with a country’s master national narrative templates and those that problematize them. This investigation further concludes that museum attempts to use this aspect of The Narrative Dimension offer an innovative way to curate difficult knowledge.
Opportunities and Challenges from a Planning Practice Perspective
Creators: name: Danadiadou, Katerina
Publisher: name: Hannover : Institutionelles Repositorium der Leibniz Universität Hannover
Year: 2023
Subjects: subject: Dewey Decimal Classification::700 | Künste, Bildende Kunst allgemein::720 | Architektur

description: [no abstract available]
MPEC 2023-H234 : 2019 KG4
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Letter from Charles Dollard to Gunnar Myrdal, July 31, 1942
Creators: name: Myrdal, Gunnar, 1898-1987
Publisher: name: Columbia University
Year: 2019
Subjects: Race relations
African Americans--Social conditions
Endowments

description: Charles Dollard's feedback on Gunnar Myrdal's manuscript for Chapters 12 and 13 and Parts 5-7 of "An American Dilemma."
Deep Dive: Ethics of Contributor Roles
Creators: name: Hosseini, Mohammad
name: Ilik, Violeta
name: Vasilevsky, Nicole
name: Holmes, Kristi
Publisher: name: Zenodo
Year: 2021
Subjects: Ethics
Contributor Roles
Scholarly Contributions
Responsibilities

description: In this session, the FORCE11 Attribution Working Group held a workshop regarding the ethics of contributor roles.

 Session Agenda Introduction. Provide a brief summary of the status quo of major contributor roles Presentation. Review on the preliminary results of a scoping review of the literature about ethics of contributor roles Interactive Discussion. Conduct an in-session survey to explore the views of attendees about contributor roles Brainstorming. Discuss ethical evolution of contributor roles.
description: This work is supported by a Pilot/Exploratory Grant from Northwestern University Center for Bioethics and Medical Humanities and the Northwestern University Clinical and Translational Sciences Institute (NUCATS, UL1TR001422). The in-session survey results can be found here: https://docs.google.com/spreadsheets/d/1adizAOC3k3OWQPInHq7C08qT3EJwPaKDy1yK1mBpSjs/edit?usp=sharing
Introduction: Sustainable Centres of the Future?!
Creators: name: Greinke, Lena
name: Mehnen, Nora
name: Lamberg, Jonas
name: Triantis, Loukas
Publisher: name: Hannover : Institutionelles Repositorium der Leibniz Universität Hannover
Year: 2023
Subjects: subject: Dewey Decimal Classification::700 | Künste, Bildende Kunst allgemein::720 | Architektur

description: [no abstract available]
Registered Education Savings Plan (RESP) vs RRSP
Creators: name: Reed, Chris
Publisher: name: Zenodo
Year: 2023
Subjects: RESP registered education savings plan
RRSP

description: This Excel spreadsheet models three decisions between an RRSP and RESP involving a trade-off of benefits. 1)Should you delay RESP contribution in order to maximize the grant? 2) When are RRSP benefits equal to RESP benefits then RESP contributions get the grant? 3) Compare RRSP vs RESP benefits when RESP contributions do not get the grant.
Chandra and ROSAT observations of Abell 194: detection of an X-ray cavity and mapping the dynamics of the cluster
Creators: name: Bogdan, Akos
name: Kraft, Ralph P.
name: Forman, William R.
name: Jones, Christine
name: Randall, Scott W.
name: Sun, Ming
name: O'Dea, Christopher P.
name: Churazov, Eugene
name: Baum, Stefi A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Based on Chandra and ROSAT observations, we investigated the nearby poor cluster Abell 194, which hosts two luminous radio galaxies, NGC547 (3C 40B) and NGC541 (3C 40A). We demonstrated the presence of a large X-ray cavity (r~34 kpc) formed by the giant southern radio lobe arising from 3C 40B in NGC547. The estimated age of the cavity is t=7.9 x 10^7 years and the total work of the AGN is 3.3 x 10^59 erg, hence the cavity power is P_cav=1.3 x 10^44 erg/s. Furthermore, in the Chandra images of NGC545 and NGC541 we detected sharp surface brightness edges, identified as merger cold fronts, and extended tails. Using the pressure ratios between inside and outside the cold fronts we estimated that the velocities of NGC545 and NGC541 correspond to Mach-numbers of M=1.0^{+0.3}_{-0.5} and M=0.9^{+0.2}_{-0.5}, respectively. The low radial velocities of these galaxies relative to the mean radial velocity of Abell 194 imply that their motion is oriented approximately in the plane of the sky. Based on these and earlier observations, we concluded that NGC545 and NGC541 are falling through the cluster, whose center is NGC547, suggesting that Abell 194 is undergoing a significant cluster merger event. Additionally, we detected 20 bright X-ray sources around NGC547 and NGC541, a surprisingly large number, since the predicted number of resolved LMXBs and CXB sources is 2.2 and 4.1, respectively. To explain the nature of additional sources, different possibilities were considered, none of which are satisfactory. We also studied the origin of X-ray emission in Minkowski's Object, and concluded that it is most likely dominated by the population of HMXBs rather than by hot diffuse ISM. Moreover, in view of the galaxy dynamics in Abell 194, we explored the possibility that the starburst in Minkowski's Object was triggered by its past interaction with NGC541, and concluded that it may be a viable path.
description: 12 pages, 7 figures, accepted for publication in ApJ
Gravity as a constrained BF theory: Noether charges and Immirzi parameter
Creators: name: Durka, R.
name: Kowalski-Glikman, J.
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We derive and analyze Noether charges associated with the diffeomorphism invariance for the constrained SO(2,3) BF theory. This result generalizes the Wald approach to the case of the first order gravity with a negative cosmological constant, the Holst modification and topological terms (Nieh-Yan, Euler, and Pontryagin). We show that differentiability of the action is automatically implemented by the the structure of the constrained BF model. Finally, we calculate the AdS--Schwarzschild black hole entropy from the Noether charge and we find that, unexpectedly, it does not depend on the Immirzi parameter.
description: 6 pages, discussion in sect. IV extended, references added, typos corrected; to be published in Physical Review D
Memories of language lost and learned : parents and the shaping of Chinese as a heritage language in Canada
Creators: name: Mizuta, Ai
Publisher: name: University of British Columbia
Year: 2017

description: Within the complex context of English language dominance and multiculturalism policy, Chinese language education is at a remarkable moment in Vancouver where history, politics and the economy are intertwined with demographic changes. This dissertation seeks to understand Chinese as a heritage language (CHL) in Canada through the stories of Chinese Canadian parents’ struggles and choices regarding their own heritage language. This study takes a life history research approach, which understands individuals’ life stories through a historical lens (Goodson & Sikes, 2001). The study consists of 10 parents from two groups of self-identified Chinese Canadians who reside in Metro Vancouver. The first group (Group 1) consists of parents who were either born in Canada or immigrated before the age of 4, had limited exposure to their heritage language, and predominantly speak English. The second group (Group 2) consists of parents who immigrated to Canada in their adulthood from Mainland China, Taiwan or Hong Kong, speak one or more of a variety of Chinese languages, and learned to speak English as an additional language. Beginning with the theoretical framework that perceives language practice as the outcome of the interrelation between socio-historical distributions of capital and the dispositions of individuals that are shaped and reshaped in their situated field (Bourdieu, 1991), this study captures CHL along multiple timescales (Braudel, 1958/2009) to understand the long term historical continuities of Chinese language education in a city shaped by colonial language hierarchies. The parents’ narratives show that despite the increasing popularity of learning Chinese and the rise of the Chinese economy, the challenges of CHL education have largely remained the same over decades. This study argues that English monolingualism as a foundational property in Canada is the root of the problem for CHL education and Chinese language programs in public schools, not the “increasing” presence of Chinese. As long as the unmarkedness of English today is (mis)recognized as natural and neutral, the markedness of Chinese as social other will still remain.
Next-to-leading-order correction to pion form factor in $k_T$ factorization
Creators: name: Li, Hsiang-nan
name: Shen, Yue-Long
name: Wang, Yu-Ming
name: Zou, Hao
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We calculate next-to-leading-order (NLO) correction to the pion electromagnetic form factor at leading twist in the $k_T$ factorization theorem. Partons off-shell by $k_T^2$ are considered in both quark diagrams and effective diagrams for the transverse-momentum-dependent (TMD) pion wave function. The light-cone singularities in the TMD pion wave function are regularized by rotating the Wilson lines away from the light cone. The soft divergences from gluon exchanges among initial- and final-state partons cancel exactly. We derive the infrared-finite $k_T$-dependent NLO hard kernel for the pion electromagnetic form factor by taking the difference of the above two sets of diagrams. Varying the renormalization and factorization scales, we find that the NLO correction is smaller, when both the scales are set to the invariant masses of internal particles: it becomes lower than 40% of the leading-order (LO) contribution for momentum transfer squared $Q^2>7$ GeV$^2$. It is observed that the NLO leading-twist correction does not play an essential role in explaining the experimental data, but the LO higher-twist contribution does.
description: 13 pages, 9 figures, version to appear in Phys. Rev. D
Population dynamics at high Reynolds number
Creators: name: Perlekar, Prasad
name: Benzi, Roberto
name: Nelson, David R.
name: Toschi, Federico
Publisher: name: arXiv
Year: 2010
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We study the statistical properties of population dynamics evolving in a realistic two-dimensional compressible turbulent velocity field. We show that the interplay between turbulent dynamics and population growth and saturation leads to quasi-localization and a remarkable reduction in the carrying capacity. The statistical properties of the population density are investigated and quantified via multifractal scaling analysis. We also investigate numerically the singular limit of negligibly small growth rates and delocalization of population ridges triggered by uniform advection.
description: 5 pages, 5 figures
Synthetic Modeling of Astronomical Closed Loop Adaptive Optics
Creators: name: Jolissaint, Laurent
Publisher: name: arXiv
Year: 2010
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We present an analytical model of a single natural guide star astronomical adaptive optics system, in closed loop mode. The model is used to simulate the long exposure system point spread function, using the spatial frequency (or Fourier) approach, and complement an initial open loop model. Applications range from system design, science case analysis and AO data reduction. All the classical phase errors have been included: deformable mirror fitting error, wavefront sensor spatial aliasing, wavefront sensor noise, and the correlated anisoplanatic and servo-lag error. The model includes the deformable mirror spatial transfer function, and the actuator array geometry can be different from the wavefront sensor lenslet array geometry. We also include the dispersion between the sensing and the correction wavelengths. Illustrative examples are given at the end of the paper.
description: 32 pages, 14 figures, accepted for publication in the Journal of the European Optical Society, Rapid Publications
title: Design and Synthesis of Novel Polymeric Dyes Incorporating Pyrazolone Units
title: Innovative Polyester Incorporating Highly Energetic Gem-Diazide Units
titleType: Subtitle
Creators: name: Krupka, Anastasiia
Publisher: name: Bergische Universität Wuppertal
Year: 2023

description: In this thesis, a comprehensive study was carried out to explore the design and synthesis of new polymeric dyes containing pyrazolone units as well as an innovative polyester containing high energy gem-diazide units. This study consists of two separate but interrelated parts. The first part of the research is focused on the synthesis of innovative hydrazone-pyrazolone methacrylic polymers. These new polymeric dyes show significant potential for applications in the detection of both inorganic and organic anions. In addition, thin films based on these polymers were carefully prepared and their linear optical properties were studied. Notably, this work is a pioneering effort in the field of polymers derived from rubazonic acid. In this context, the synthesis of a rubazonic acid homopolymer was achieved by Glaser coupling, and polymers design using decarbonylative polyaddition, nucleophilic substitution methods, and successful creation of rubazonic acid based on polyurethanes using condensation reactions. In addition, a comprehensive optical characterization of rubazonic acid was carried out. The second part of the study is devoted to the research of an innovative polyester containing high-energy gem-diazide units. In this work, a detailed study was carried out for the synthesis of polyesters containing gem-diazide units. Two different synthetic routes were investigated, including a careful analysis of the reaction sequences. Subsequently, the most effective approach for obtaining the longest and soluble polymers was determined and selected. By combining these two aspects of research, a significant contribution is expected to the development of polymeric materials with a variety of applications, ranging from sensor technologies to energy-related materials.
Cu3Nb2O8: a multiferroic with chiral coupling to the crystal structure
Creators: name: Johnson, R. D.
name: Nair, Sunil
name: Chapon, L. C.
name: Bombardi, A.
name: Vecchini, C.
name: Prabhakaran, D.
name: Boothroyd, A. T.
name: Radaelli, P. G.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: By combining bulk properties, neutron diffraction and non-resonant X-ray diffraction measurements, we demonstrate that the new multiferroic Cu$_3$Nb$_2$O$_8$ becomes polar simultaneously with the appearance of generalised helicoidal magnetic ordering. The electrical polarization is oriented perpendicularly to the common plane of rotation of the spins --- an observation that cannot be reconciled with the "conventional" theory developed for cycloidal multiferroics. Our results are consistent with coupling between a macroscopic structural rotation, which is allowed in the paramagnetic group, and magnetically-induced structural chirality.
description: This article is in print with Physical Review Letters
Unveiling Heart Failure in Animals: Insights from Necropsy Diagnosis and Clinical Manifestations
Creators: name: Avantika Srivastav*, Ithrineni Karthik, S. D Vinay Kumar
Publisher: name: The Science world a Monthly e magazine
Year: 2024

description: Heart failure (HF) manifests as a clinical syndrome marked by symptoms like shortness of breath, fatigue, swelling, and reduced exercise capacity. These symptoms arise from the heart's inability to adequately compensate for its pumping function, a condition brought about by structural and/or functional abnormalities within the heart. Necropsy diagnosis plays a pivotal role in understanding the impact of heart failure on animals. It provides a comprehensive postmortem examination, shedding light on histopathological changes, cardiac defects, and associated complications, facilitating a deeper comprehension of cardiac diseases in diverse species.
Bounded-rank tensors are defined in bounded degree
Creators: name: Draisma, Jan
name: Kuttler, Jochen
Publisher: name: arXiv
Year: 2011
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14Q15, 15A69, 13E05

description: Matrices of rank at most k are defined by the vanishing of polynomials of degree k + 1 in their entries (namely, their (k + 1)-times-(k + 1)-subdeterminants), regardless of the size of the matrix. We prove a qualitative analogue of this statement for tensors of arbitrary dimension, where matrices correspond to two-dimensional tensors. More specifically, we prove that for each k there exists an upper bound d = d(k) such that tensors of border rank at most k are defined by the vanishing of polynomials of degree at most d, regardless of the dimension of the tensor and regardless of its sizes in each dimension. Our proof involves passing to an infinite-dimensional limit of tensor powers of a vector space, whose elements we dub infinite-dimensional tensors, and exploiting the symmetries of this limit in crucial way.
description: Corrected the formulation of Corollary 1.4---thanks to Sonja Petrovic!
Wiggle room for teaching English as a global language? : Western-educated Taiwanese English teachers’ identities and teaching of English writing
Creators: name: Lin, Rae Jui-Ping
Publisher: name: University of British Columbia
Year: 2017

description: As the English language spreads around the globe and is used for various purposes in different social and cultural contexts, scholars and local practitioners have called for deconstructing the ideology of native-speakerism (Holliday, 2006, 2015) and reconstructing the local subjectivity of English language education (e.g., Canagarajah, 2005; Kumaravadivelu, 2016). In this transformation process of English language education, language teacher identity has played a central role because how teachers see themselves as English speakers, writers, and teachers is closely linked to what and how they teach in the language classroom (Varghese et al., 2005). Investigating such transformative potential of English writing education in Taiwan, the present ten-month qualitative case study takes social constructionist perspective to examine four Western-educated Taiwanese teachers’ writing and teacher identities and their teaching of English writing in relation to the discourse of native-speakerism in four Taiwanese universities. Based on data generated from interviews, classroom observation, email correspondence, and class materials, the study illustrates that language teachers’ training and writing experiences, their ideologies about the English language, and students’ and administrators’ expectations of how the English language should be taught all have a great impact on teacher identity formation and teaching practices. Two participants (Ava and Beth) depended on native-like English proficiency and Western pedagogical knowledge acquired while studying in Western graduate programs to define who they were as English writing teachers. The discourse of native-speakerism was reinforced in their English writing classrooms, leaving little room for local English norms and pedagogies to develop. In comparison, the other two participants (Sarah and Nita) viewed themselves as multicompetent writers and offered more space in their writing classrooms for developing non-Anglophone Englishes. However, the possibility for writing alternative forms was denied by Nita’s students and administrators, who expected her to help students achieve high scores on standardized tests. The study adds insights into the scholarship of professional identity construction of Western-educated English writing teachers, an area of research that remains scant in quantity. It also provides pedagogical implications for teacher education programs to cultivate more agents of change (Morgan, 2010) in teaching English writing as a global communicative means.
Degenerate Fermi gas perturbations at standard background cosmology
Creators: name: Bernardini, Alex E.
name: Perico, E. L. D.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The hypothesis of a tiny fraction of the cosmic inventory evolving cosmologically as a degenerate Fermi gas test fluid at some dominant cosmological background is investigated. Our analytical results allow for performing preliminary computations to the evolution of perturbations for relativistic and non-relativistic test fluids. The density fluctuation, $δ$, the fluid velocity divergence, $θ$, and an explicit expression for the dynamics of the shear stress, $σ$, are obtained for a degenerate Fermi gas in the background regime of radiation. Extensions to the dominance of matter and to the $Λ$CDM cosmological background are also investigated and lessons concerning the formation of large structures of degenerate Fermi gas are depicted.
description: 20 pages, 4 figures
MPEC 2023-H235 : 2022 OO6
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2023
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
Real elements in the mapping class group of $T^2$
Creators: name: Salepci, Nermin
Publisher: name: arXiv
Year: 2010
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: We present a complete classification of elements in the mapping class group of the torus which have a representative that can be written as a product of two orientation reversing involutions. Our interest in such decompositions is motivated by features of the monodromy maps of real fibrations. We employ the property that the mapping class group of the torus is identifiable with $SL(2,\Z)$ as well as that the quotient group $PSL(2,\Z)$ is the symmetry group of the {\em Farey tessellation} of the Poincaré disk.
description: 15 pages, 11 figures
Outage Probability for Multi-Cell Processing under Rayleigh Fading
Creators: name: Garcia, Virgile
name: Gorce, Jean-Marie
name: Lebedev, Nikolai
Publisher: name: arXiv
Year: 2010
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Multi-cell processing, also called Coordinated Multiple Point (CoMP), is a very promising distributed multi-antennas technique that uses neighbour cell's antennas. This is expected to be part of next generation cellular networks standards such as LTE-A. Small cell networks in dense urban environment are mainly limited by interferences and CoMP can strongly take advantage of this fact to improve cell-edge users' throughput. This paper provides an analytical derivation of the capacity outage probability for CoMP experiencing fast Rayleigh fading. Only the average received power (slow varying fading) has to be known, and perfect Channel State Information (CSI) is not required. An optimisation of the successfully received data-rate is then derived with respect to the number of cooperating stations and the outage probability, illustrated by numerical examples.
Evidence of theta(13)>0 from global neutrino data analysis
Creators: name: Fogli, G. L.
name: Lisi, E.
name: Marrone, A.
name: Palazzo, A.
name: Rotunno, A. M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The neutrino mixing angle theta(13) is at the focus of current neutrino research. From a global analysis of the available oscillation data in a 3-neutrino framework, we previously reported [Phys. Rev. Lett. 101, 141801 (2008)] hints in favor of theta(13)>0 at the 90 % C.L. Such hints are consistent with the recent indications of nu(mu)-->nu(e) appearance in the T2K and MINOS long-baseline accelerator experiments. Our global analysis of all the available data currently provides >3 sigma evidence for nonzero theta(13), with 1-sigma ranges sin^2 theta(13) = 0.021+-0.007 or 0.025+-0.007, depending on reactor neutrino flux systematics. Updated ranges are also reported for the other 3-neutrino oscillation parameters (delta m^2, sin^2 theta(12)) and (Delta m^2, sin^2 theta(23)).
description: Slightly revised text; results unchanged. To appear in Phys. Rev. D
Slip behaviour of the Queen Charlotte plate boundary before and after the 2012, Mw 7.8 Haida Gwaii earthquake : evidence from repeating earthquakes
Creators: name: Hayward, Timothy W.
Publisher: name: University of British Columbia
Year: 2017

description: The Queen Charlotte plate boundary, near Haida Gwaii, B.C., includes the dextral, strike-slip, Queen Charlotte Fault (QCF) and the subduction interface between the downgoing Pacific and overriding North American plates. In this dissertation, we present a comprehensive repeating earthquake catalogue that represents an effective slip meter for both faults in the area. The catalogue comprises 730 individual earthquakes (0.3 < Mw < 3.5) arranged into 224 repeating earthquake families on the basis of waveform similarity. We employ and extend existing relationships for repeating earthquake magnitudes and slips to provide cumulative slip histories for the QCF and subduction interface in 6 adjacent zones within the study area between 52.3°N and 53.8°N. We find evidence for creep on both faults; however, the creep rate is significantly less than plate motion rates, which suggests partial locking of both faults. The QCF exhibits the highest degrees of locking south of 52.8°N, which indicates that the seismic hazard for a major strike-slip earthquake is highest in the southern part of the study area. The October 28, 2012, Mw 7.8 Haida Gwaii thrust earthquake occurred in our study area and had a significant effect on the plate boundary. The QCF is observed to undergo accelerated, right-lateral slip for 1-2 months following the earthquake. The subduction interface exhibits afterslip thrust motion that persists for the duration of the study period (i.e., 3 years and 2 months after the Haida Gwaii earthquake). Afterslip is greatest on the periphery of the main rupture zone of the Haida Gwaii event.
Coordination in Power Systems for Efficient Grid Utilization
Creators: name: Ilg, Jens Patrick
Publisher: name: Karlsruhe
Year: 2014
Subjects: Coordination
Power Systems
Grid capacity

description: This thesis focuses on the efficient use of power grid capacity and efficient investment into grid infrastructure on different voltage levels. More specifically, it analyzes different coordination mechanisms and incentives to achieve more efficient short-term operation and long-term investment behavior.
Energy efficient wireless body area network design in health monitoring scenarios
Creators: name: Zhou, Yang
Publisher: name: University of British Columbia
Year: 2017

description: Wireless body area networks (WBANs) are one of the key technologies that support the development of ubiquitous health monitoring, which has attracted increasing attention in recent years. Wireless on-body sensors free the patients from countless tangled wires, and wireless implanted sensors make it possible for the doctors to monitor an extensive range of critical bio-information continuously, which is crucial for a quick reaction when emergency happens. Due to the size limitation on the sensor nodes and the importance of the life signals transmitted, compared with general wireless sensor networks (WSNs), WBANs have more stringent requirements on reliability and energy efficiency during data's collection and transmission. This thesis aims to propose effective network designs to increase packet delivery rate, reduce energy consumption and prolong network lifetime for WBANs. In order to solve the major challenges faced by WBANs, due to the energy efficiency and reliable data transmission requirements, in this thesis, network design over multiple layers are considered, including physical layer, medium access control (MAC) layer and routing layer. Network topology design that is suitable for WBANs is also considered. Specifically this thesis: 1. Investigates the design of MAC protocols and proposes an opportunistic scheduling scheme by applying heuristic scheduling and dynamic superframe length adjustment to improve the packet delivery rate and improve transmission reliability; 2. Formulates and solves a mathematical optimization problem to maximize network lifetime, which jointly considers network topology design, transmission power control and routing strategy. Multilevel primal and dual decomposition methods are employed to solve the proposed non-convex mixed-integer optimization problem. A solution with fast convergence rate based on binary search is provided. Simulations have been conducted to show that our proposed network design increases network performance to a large extent compared with existing solutions.
On the topology of the hypermultiplet moduli space in type II/CY string vacua
Creators: name: Alexandrov, Sergei
name: Persson, Daniel
name: Pioline, Boris
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: By analyzing qualitative aspects of NS5-brane instanton corrections, we determine the topology of the hypermultiplet moduli space M_H in Calabi-Yau compactifications of type II string theories at fixed value of the dilaton and of the Calabi-Yau metric. Specifically, we show that for fivebrane instanton couplings to be well-defined, translations along the intermediate Jacobian must induce non-trivial shifts of the Neveu-Schwarz axion which had thus far been overlooked. As a result, the Neveu-Schwarz axion parametrizes the fiber of a circle bundle, isomorphic to the one in which the fivebrane partition function is valued. In the companion paper arXiv:1010.5792, we go beyond the present analysis and take steps towards a quantitative description of fivebrane instanton corrections, using a combination of mirror symmetry, S-duality, topological string theory and twistor techniques.
description: 5 pages, (v2) discussion about characteristics improved
Expression rekombinanter Sensoren zur Visualisierung der Oberflächendynamik des Eph/ephrin-Systems in retinalen Wachstumskegeln des Huhns
Creators: name: Weschenfelder, Markus
Publisher: name: Karlsruhe
Year: 2014
Subjects: Axonale Lenkung
ephrin
Eph
retinotektale Projektion
Elektroporation

description: Während der retinotektalen Projektion im Huhn werden Axone retinaler Ganglienzellen (RGCs) von Gegengradienten aus EphA und ephrin-A in Retina und optischem Tektum gelenkt. In dieser Arbeit konnte mit einer verbesserten Elektroporationsmethode SNAP-ephrin-A5 in RGCs exprimiert und fluoreszenzmikroskopisch nachgewiesen werden, dass ephrin-A5 während der EphA und ephrin-A-Signaltransduktion an der Wachstumskegeloberfläche reduziert wird. Dies deutet auf eine neue Form der Koregulation hin.
On the defect induced gauge and Yukawa fields in graphene
Creators: name: Sochichiu, Corneliu
Publisher: name: arXiv
Year: 2010
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We consider lattice deformations (both continuous and topological) in the hexagonal lattice Hubbard model in the tight binding approximation to graphene, involving operators with the range up to next-to-neighbor. In the low energy limit, we find that these deformations give rise to couplings of the electronic Dirac field to an external scalar (Yukawa) and gauge fields. The fields are expressed in terms of original defects. As a by-product we establish that the next-to-nearest order is the minimal range of deformations which produces the complete gauge and scalar fields. We consider an example of Stone--Wales defect, and find the associated gauge field.
description: 21 pages, 2 figures, added the example of Stone-Wales defect, presentation considerable improved
Microreactors for Gas/Liquid Reactions: The Role of Surface Properties
Creators: name: Hecht, Kristin
Publisher: name: Karlsruhe
Year: 2013

description: The effect of wettability on gas/liquid flow in microreactors has been investigated in capillaries of various materials. The absorption of carbon dioxide into aqueous solutions of sodium hydroxide has been used to investigate gas/liquid flow and reaction in capillaries and in a microstructured falling film reactor.
Einfluss der Sinteratmosphäre auf die Eigenschaften kogesinterter PZT-Multilayeraktoren mit Ag-Pd Elektroden
Creators: name: Oldenkotte, Moritz
Publisher: name: Karlsruhe
Year: 2013
Subjects: Sintern
PZT
Aktor
SKN-PZT

description: In der vorliegenden Arbeit wurde Einfluss der Sinteratmosphäre auf die Eigenschaften kogesinterter SKN-PZT-Multilayeraktoren untersucht. Dabei lag der Schwerpunkt auf der Abgrenzung des Einflusses der sich einstellenden PbO-Stöchiometrie und der Ag-Pd Elektrode auf die Gefügeentwicklung und damit die dielektrischen und piezoelektrischen Eigenschaften der Aktoren. Ziel war dabei ein erweitertes Sintermodell für die Großserienfertigung von PZT-Aktoren.
Algorithm Engineering for Realistic Journey Planning in Transportation Networks
Creators: name: Pajor, Thomas
Publisher: name: Karlsruhe
Year: 2013

description: Diese Dissertation beschäftigt sich mit der Routenplanung in Transportnetzen. Es werden neue, effiziente algorithmische Ansätze zur Berechnung optimaler Verbindungen in öffentlichen Verkehrsnetzen, Straßennetzen und multimodalen Netzen, die verschiedene Transportmodi miteinander verknüpfen, eingeführt. Im Fokus der Arbeit steht dabei die Praktikabilität der Ansätze, was durch eine ausführliche experimentelle Evaluation belegt wird.
Unveiling quantum entanglement degradation near a Schwarzschild black hole
Creators: name: Martin-Martinez, E.
name: Garay, L. J.
name: Leon, J.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We analyze the entanglement degradation provoked by the Hawking effect in a bipartite system Alice-Rob when Rob is in the proximities of a Schwarzschild black hole while Alice is free falling into it. We will obtain the limit in which the tools imported from the Unruh entanglement degradation phenomenon can be used properly, keeping control on the approximation. As a result, we will be able to determine the degree of entanglement as a function of the distance of Rob to the event horizon, the mass of the black hole, and the frequency of Rob's entangled modes. By means of this analysis we will show that all the interesting phenomena occur in the vicinity of the event horizon and that the presence of event horizons do not effectively degrade the entanglement when Rob is far off the black hole. The universality of the phenomenon is presented: There are not fundamental differences for different masses when working in the natural unit system adapted to each black hole. We also discuss some aspects of the localization of Alice and Rob states. All this study is done without using the single mode approximation.
description: 16 pages, 10 figures, revtex4. Added Journal reference
Detection of Microwave Emission of Extensive Air Showers with the CROME Experiment
Creators: name: Werner, Felix
Publisher: name: Karlsruhe
Year: 2013
Subjects: cosmic rays
extensive air showers
radio emission
microwave emission

description: This thesis reports on the design, calibration, and first data analysis of the CROME (Cosmic-Ray Observation via Microwave Emission) experiment searching for microwave radio emission from extensive air showers. The observations are consistent with a mainly forward-directed and polarised emission process in the GHz frequency range. The measurements show that microwave radiation offers a new means of studying air showers at energies above ~10^17 eV.
Effect of epitaxial strain on the cation distribution in spinel ferrites CoFe2O4 and NiFe2O4: a density functional theory study
Creators: name: Fritsch, Daniel
name: Ederer, Claude
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The effect of epitaxial strain on the cation distribution in spinel ferrites CoFe2O4 and NiFe2O4 is investigated by GGA+U total energy calculations. We obtain a very strong (moderate) tendency for cation inversion in NiFe2O4 (CoFe2O4), in agreement with experimental bulk studies. This preference for the inverse spinel structure is reduced by tensile epitaxial strain, which can lead to strong sensitivity of the cation distribution on specific growth conditions in thin films. Furthermore, we obtain significant energy differences between different cation arrangements with the same degree of inversion, providing further evidence for recently proposed short range B site order in NiFe2O4.
description: 9 pages, 2 figures, revised version
Schädigung und Lebensdauer von Aluminium-Gusslegierungen für thermisch-mechanisch hochbeanspruchte Motorbauteile
Creators: name: Harnischmacher, Ansgar
Publisher: name: Karlsruhe
Year: 2013
Subjects: TMF
Lebensdauer
Aluminium
Ermüdung
Guss

description: In dieser Arbeit werden der Einfluss des Wärmebehandlungszustandes einer Aluminiumguss-Legierung zu Versuchsbeginn sowie der Einfluss unterschiedlich langer Haltezeiten im ersten Lastzyklus auf die Schädigungsentwicklung und die Lebensdauer unter thermisch mechanischer Beanspruchung dargestellt. Zur Untersuchung der Übertragbarkeit dieser Ergebnisse auf Bauteile werden des Weiteren bauteilnahe TMF-Versuche vorgestellt und eine Lebensdauervorhersage durchgeführt.
Neutrinoless double beta decay of $^{150}$Nd with account for deformation
Creators: name: Fang, Dong-Liang
name: Faessler, Amand
name: Rodin, Vadim
name: Simkovic, Fedor
Publisher: name: arXiv
Year: 2010
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: A microscopic state-of-the-art calculation of the nuclear matrix element for neutrinoless double beta decay of $^{150}$Nd with an account for nuclear deformation is performed. The proton-neutron quasiparticle random phase approximation (QRPA) with a realistic residual interaction [the Brueckner $G$ matrix derived from the charge-depending Bonn (Bonn-CD) nucleon-nucleon potential] is used as the underlying nuclear structure model. The present calculated matrix element is suppressed by about 40% as compared with our previous QRPA result for $^{150}$Nd obtained with neglect of deformation. By making use of this newest nuclear matrix element, one may conclude that neutrinoless double beta decay of $^{150}$Nd, to be measured soon by the SNO+ collaboration, provides one of the best probes of the Majorana neutrino mass.
description: 7 pages, to be published in PRC
Emotions and Emotion Regulation in Economic Decision Making
Creators: name: Astor, Philipp J.
Publisher: name: Karlsruhe
Year: 2013
Subjects: Experimental Economic
Behavioral Finance
Decision Making
Emotions
Psychophysiology

description: By employing the methodology of experimental economics, the thesis examines the influence of emotions on decision making in electronic auction markets. Subjects' emotional processes are measured by psychophysiological indicators, helping to decipher the coherence of information, emotion (regulation) and decision making. Four chapters build the main body of the thesis and all are constructed similarly: introduction, design, method, results, limitations, theoretical and managerial implications.
Variational study of a mobile hole in a two dimensional quantum antiferromagnet using entangled-plaquette states
Creators: name: Mezzacapo, Fabio
Publisher: name: arXiv
Year: 2010
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the properties of a mobile hole in the $t-J$ model on the square lattice by means of variational Monte Carlo simulations based on the entangled-plaquette ansatz. Our energy estimates for small lattices reproduce available exact results. We obtain values for the hole energy dispersion curve on large lattices in quantitative agreement with earlier findings based on the most reliable numerical techniques. Accurate estimates of the hole spectral weight are provided.
description: 5 pages, 2 tables, 4 figures
The second act of hydro: small perturbations
Creators: name: Staig, Pilar
name: Shuryak, Edward
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Hydrodynamical description of the "Little Bang" in heavy ion collisions is surprisingly successful: here we systematically study propagation of small perturbations %, also treated hydrodynamically. Using analytic description of the expanding fireball known as the "Gubser flow", we proceed to linearized equations for perturbations. As all variables are separated and all equations solved (semi)analytically, we can collect all the harmonics and reconstruct the complete Green function of the problem, even in the viscous case. Applying it to the power spectrum we found acoustic minimum at the $m=7$ and maximum at $m=9$, which remarkably have some evidence for both in the data. We estimate effective viscosity and size of the perturbation from a fit to power spectrum. The shape of the two-point correlator is also reproduced remarcably well. At the end we argue that independent perturbations are local, and thus harmonics phases are correlated.
description: the paper is written version of the talk at Quark Matter 2011, and it will appear in this form in proceedings published in J. Phys. G: Nucl. Part. Phys