cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The chemical history of molecules in circumstellar disks. I. Ices
Creators: name: Visser, R.
name: van Dishoeck, E. F.
name: Doty, S. D.
name: Dullemond, C. P.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: (Abridged) Aims & Methods. A two-dimensional, semi-analytical model is presented that follows, for the first time, the chemical evolution from a collapsing molecular cloud (a pre-stellar core) to a protostar and circumstellar disk. The model computes infall trajectories from any point in the cloud and tracks the radial and vertical motion of material in the viscously evolving disk. It includes a full time-dependent radiative transfer treatment of the dust temperature, which controls much of the chemistry. A small parameter grid is explored to understand the effects of the sound speed and the mass and rotation of the cloud. The freeze-out and evaporation of carbon monoxide (CO) and water (H2O), as well as the potential for forming complex organic molecules in ices, are considered as important first steps to illustrate the full chemistry. Results. Both species freeze out towards the centre before the collapse begins. Pure CO ice evaporates during the infall phase and re-adsorbs in those parts of the disk that cool below the CO desorption temperature of ~18 K. H2O remains solid almost everywhere during the infall and disk formation phases and evaporates within ~10 AU of the star. Mixed CO-H2O ices are important in keeping some solid CO above 18 K and in explaining the presence of CO in comets. Material that ends up in the planet- and comet-forming zones of the disk is predicted to spend enough time in a warm zone during the collapse to form first-generation complex organic species on the grains. The dynamical timescales in the hot inner envelope (hot core or hot corino) are too short for abundant formation of second-generation molecules by high-temperature gas-phase chemistry.
description: 18 pages, 16 figures, accepted by A&A
Architecture for high-sensitivity single-shot readout and control of the electron spin of individual donors in silicon
Creators: name: Morello, A.
name: Escott, C. C.
name: Huebl, H.
name: van Beveren, L. H. Willems
name: Hollenberg, L. C. L.
name: Jamieson, D. N.
name: Dzurak, A. S.
name: Clark, R. G.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We describe a method to control and detect in single-shot the electron spin state of an individual donor in silicon with greatly enhanced sensitivity. A silicon-based Single-Electron Transistor (SET) allows for spin-dependent tunneling of the donor electron directly into the SET island during the read-out phase. Simulations show that the charge transfer signals are typically Δq > 0.2 e - over an order of magnitude larger than achievable with metallic SETs on the SiO2 surface. A complete spin-based qubit structure is obtained by adding a local Electron Spin Resonance line for coherent spin control. This architecture is ideally suited to demonstrate and study the coherent properties of donor electron spins, but can be expanded and integrated with classical control electronics in the context of scale-up.
description: 5 pages, 4 figures
Some aspects of nuclear spin relaxation for dilute polyatomic gases
Creators: name: Sanctuary, Bryan Clifford
Publisher: name: University of British Columbia
Year: 2011

description: The density dependence of nuclear spin relaxation in polyatomic gases is studied theoretically. In particular, the experimentally observed non-linear dependence of T₁ on density at high density is explained. A quantum mechanical Boltzmann equation is used to formulate the theory. The particular Boltzmann equation used describes the time evolution of a one particle density operator and this affords an adequate description of a dilute gas. No restriction on the internal states of the polyatomic molecules is required. An expression for T₁⁻¹ is obtained in terms of a relaxation matrix, the elements of which are collision Integrals between the various intramolecular transition processes which contribute to the relaxation rate. The diagonal terms of this matrix describe the relaxation rate and frequency shifts for each internal state transition frequency while the off-diagonal terms account for the collisional overlapping between the various internal state frequencies. The collision integrals are partially evaluated by a distorted wave Born approximation and are reduced to traces over internal states and integrals over the relative velocity of the colliding pair. The internal state traces are evaluated exactly while the relative velocity integrals are left as scaling parameters. The theoretical expression is applied to the symmetric top molecules CH₃F and CF₃H to account for the experimentally observed "step effect". On the basis of experimental evidence an intramolecular dipolar mechanism is used and it is shown that this gives adequate agreement with the experimental data. The steps arise as a result of the phase randomization of the low lying rotational K levels.
The Nature of Time: from a Timeless Hamiltonian Framework to Clock Time of Metrology
Creators: name: Prati, Enrico
Publisher: name: arXiv
Year: 2009
Subjects: subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: The problem of the Nature of Time is twofold: whether or not time is a fundamental quantity of Nature, and how does clock time of metrology emerge in the experimental description of dynamics. This work strongly supports the fundamental timelessness of Nature. However, the correct view that physics is described by relations between variables does not address the second problem of how time does emerge at the macroscopic scale on the ground of a timeless framework. In this work ordinary Hamiltonian dynamics is recast in a timeless formalism capable to provide a definition of parameter time on the basis of the only generalized coordinates, together with the Hamiltonian invariance on trajectories, and a variational principle. Next, by relaxing the assumption of periodicity of real clocks to the only cyclicity in the phase space, the second problem is addressed. Physical systems, if complex enough, can be separated in a subsystem whose dynamics is described, and another cyclic subsystem which behaves as a clock. The dynamics of the first is mapped in the states of the second cyclic subsystem which provides a discrete approximation of the parameter time. Useful clocks fulfill a stability prescription which guarantees that dynamics is expressed by simple laws also in terms of metric time as naturally happens for parameter time. The two ideas provide a unitary framework capable to account the fundamental timelessness of Nature, and the experimental evidence of time evolution in macroscopic systems experienced by the observers.
description: Fourth Classified at the FQXI Essay Contest "The Nature of Time"
String Quartet #7 (First Movement) "The Fourth of July Quartet" (VIOLIN 1)
Creators: name: Elia, Anthony J.
Publisher: name: Columbia University
Year: 2013
Subjects: Music

description: The String Quartet #7, named "The Fourth of July Quartet" was written over the course of one week, beginning on the 4th of July, 2013. It was written for violinist Maureen Murchie and friends.
On the Hydrogen Recombination Time in Type II Supernova Atmospheres
Creators: name: De, Soma
name: Baron, E.
name: Hauschildt, P. H.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: NLTE radiative transfer calculations of differentially expanding supernovae atmospheres are computationally intensive and are almost universally performed in time-independent snapshot mode. The validity of the steady-state approximation in the rate equations has recently been questioned. We calculate the effective recombination time of hydrogen in SN II using our general purpose model atmosphere code PHOENIX. While we find that the recombination time for the conditions of SNe II at early times is increased over the classical value for the case of a simple hydrogen model atom with energy levels corresponding to just the first 2 principle quantum numbers, the classical value of the recombination time is recovered in the case of a multi-level hydrogen atom. We also find that the recombination time at most optical depths is smaller in the case of a multi-level atom than for a simple two-level hydrogen atom. We find that time dependence in the rate equations is important in the early epochs of a supernova's lifetime. The changes due to the time dependent rate equation (at constant input luminosity) are manifested in physical parameters such as the level populations which directly affects the spectra. The H-alpha profile is affected by the time dependent rate equations at early times. At later times time dependence does not significantly modify the level populations and therefore the H-alpha profile is roughly independent of whether the steady-state or time-dependent approach is used.
description: Abstract shortened for arXiv. 39 pages, 16 figures, MNRAS in press
Managing health and masculinities : negotiating identities over the life course
Creators: name: Coles, Tony Gordon
Publisher: name: University Of Tasmania
Year: 2023

description: To date, very little research has been conducted into how men negotiate masculinities over the life course, and how health and ageing affect men's masculinities. This thesis considers the importance of gender to men's health issues and develops a theoretical model to analyse how men develop strategies to negotiate masculinities, health and ageing over the life course, and the importance of the body to men's identities. This thesis also considers men's health issues and men's masculinities across a broad range of ages. In Australian society, the smooth, lean, toned, youthful male body has come to represent the culturally dominant ideal that personifies hegemonic masculinity (e.g., strong, hard, powerful, virile, competent). As men's bodies' age and shift further from the ideal, little is known about how they come to negotiate masculinity. Furthermore, how this transition affects their health and wellbeing is currently under-explored. Health, in turn, may also be negotiated to protect a masculine identity. Little is understood as to how and why men negotiate masculinities over the life course or what this ultimately means to men's health more broadly. This thesis investigates these issues by engaging in empirical research involving in-depth interviews with men from around Tasmania, Australia, and analysing the results to understand what health and masculinity mean to men of different ages, and the ways in which each impinges on the other over the course of men's lives.
A note on the dynamical zeta function of general toral endomorphisms
Creators: name: Baake, Michael
name: Lau, Eike
name: Paskunas, Vytautas
Publisher: name: arXiv
Year: 2008
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37C30, 37C25

description: It is well-known that the Artin-Mazur dynamical zeta function of a hyperbolic or quasi-hyperbolic toral automorphism is a rational function, which can be calculated in terms of the eigenvalues of the corresponding integer matrix. We give an elementary proof of this fact that extends to the case of general toral endomorphisms without change. The result is a closed formula that can be calculated by integer arithmetic only. We also address the functional equation and the relation between the Artin-Mazur and Lefschetz zeta functions.
description: 8 pages; revised and slightly expanded version
Covariant Galileon
Creators: name: Deffayet, C.
name: Esposito-Farese, G.
name: Vikman, A.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We consider the recently introduced "galileon" field in a dynamical spacetime. When the galileon is assumed to be minimally coupled to the metric, we underline that both field equations of the galileon and the metric involve up to third-order derivatives. We show that a unique nonminimal coupling of the galileon to curvature eliminates all higher derivatives in all field equations, hence yielding second-order equations, without any extra propagating degree of freedom. The resulting theory breaks the generalized "Galilean" invariance of the original model.
description: 10 pages, no figure, RevTeX4 format; v2 adds footnote 1, Ref. [12], reformats the link in Ref. [14], and corrects very minor typos
Global Infrastructure: The Potential of SRTM Data to Break New Ground
Creators: name: Blom, Ronald
name: Sutton, Paul
name: Yetman, Gregory G.
name: Nghiem, Son
name: Balk, Deborah
name: Wannebo, Antoinette
name: Small, Christopher
name: Deichmann, Uwe
name: Chen, Robert S.
name: Rodriguez, Ernesto
name: Houshmand, Bijan
name: Neumann, Greg
Publisher: name: Columbia University
Year: 2001
Subjects: Communication of technical information

description: The Shuttle Radar Topography Mission (SRTM) data set presents a unique opportunity to obtain a global, cloud-transparent instantaneous snapshot of imagery from urban and suburban regions, together with collocated topographic information, which can be used to characterize building types, land use, and other key population variables. The SRTM data set in synergy with other global remote sensing data sets, such as Landsat 7, ASTER and DMSP-OLS nighttime imagery, can be used to derive a number of major (but not ALL) parameters constituting a significant part of the global infrastructure data set consistently at the time period during which the SRTM data set was collected (February 2000). The long-term goal is to create a database of global infrastructure which is useful for a multitude of physical and social scientific and operational applications. The general definition of infrastructure can be quite wide and includes all man-made structures and/or natural structures that are modified for human use. The resulting product will ultimately present a unique resource which can be used as a global reference of the state of the world in the year 2000 for future studies of urbanization, infrastructure, population and land use change.
Ultraweak excitations of the quantum vacuum as physical models of gravity
Creators: name: Consoli, M.
Publisher: name: arXiv
Year: 2009
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: It has been argued by several authors that the space-time curvature observed in gravitational fields, and the same idea of forms of physical equivalence different from the Lorentz group, might emerge from the dynamical properties of the physical flat-space vacuum in a suitable hydrodynamic limit. To explore this idea, one could start by representing the physical vacuum as a Bose condensate of elementary quanta and look for vacuum excitations that, on a coarse grained scale, resemble the Newtonian potential. In this way, it is relatively easy to match the weak-field limit of classical General Relativity or of some of its possible variants. The idea that Bose condensates can provide various forms of gravitational dynamics is not new. Here, I want to emphasize some genuine quantum field theoretical aspects that can help to understand i) why infinitesimally weak, 1/r interactions can indeed arise from the same physical vacuum of electroweak and strong interactions and ii) why, on a coarse-grained scale, their dynamical effects can be re-absorbed into an effective curved metric structure.
description: 30 pages, no figures, accepted by Classical and Quantum Gravity
Additional file 1 of A predictive tool for the assessment of right ventricular dysfunction in non-high-risk patients with acute pulmonary embolism
Creators: name: Yizhuo Gao
name: Lianghong Chen
name: Jia, Dong
Publisher: name: figshare
Year: 2021
Subjects: subject: Space Science
subject: Medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Hematology

description: Additional file 1. Clot location (CTPA images describing the classifications of the clot locations).
Graphical algorithms and threshold error rates for the 2d colour code
Creators: name: Wang, D. S.
name: Fowler, A. G.
name: Hill, C. D.
name: Hollenberg, L. C. L.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Recent work on fault-tolerant quantum computation making use of topological error correction shows great potential, with the 2d surface code possessing a threshold error rate approaching 1% (NJoP 9:199, 2007), (arXiv:0905.0531). However, the 2d surface code requires the use of a complex state distillation procedure to achieve universal quantum computation. The colour code of (PRL 97:180501, 2006) is a related scheme partially solving the problem, providing a means to perform all Clifford group gates transversally. We review the colour code and its error correcting methodology, discussing one approximate technique based on graph matching. We derive an analytic lower bound to the threshold error rate of 6.25% under error-free syndrome extraction, while numerical simulations indicate it may be as high as 13.3%. Inclusion of faulty syndrome extraction circuits drops the threshold to approximately 0.1%.
description: 20 pages, 19 figures
Investigating Homelessness And Social Cognition
Creators: name: Nardini, Bianca
Publisher: name: University of East London
Year: 2023
Subjects: Homelessness
TBI
Cognitive impairment
Social cognition

description: Introduction: The relationship between homelessness and brain injury is a growing area of interest in the literature. Several studies have used cognitive screening tools to ascertain the level of cognitive impairment present in this population and very few studies have used comprehensive neuropsychological batteries. Social cognition remains an underexplored area in homelessness, and it may serve as a causal and perpetuating factor. Better understanding the social cognitive needs of homeless individuals can help inform intervention strategies and preventative policies.

Aims: The present study aims to use a comprehensive neuropsychological test battery including social cognition measures to explore the cognitive needs of a sample of homeless men.

Methods: Eight residents of a homeless hostel took part in the study. Scores were analysed against normative data and exploratory non-parametric correlations revealed tentative relationships between cognitive domains. A case series analysis was also conducted for descriptive data exploration.

Results: Individual and group-level exploratory analyses revealed several cognitive difficulties, including impairment in a mentalising task. No impairment was found in the domains of empathy and emotion recognition.

Discussion: The findings add to the literature on cognitive impairments in homeless men and suggest the need for including social cognition measures in routine assessments. Implications for clinical practice and future research are discussed.
Repositioning secondary English pre-service teachers as bricoleurs
Creators: name: Booth, Sara Peta
Publisher: name: University Of Tasmania
Year: 2023

description: This thesis investigates the discourses that were present in one teacher education site in Tasmania over a two-year period. This involved both the investigation and analysis of teacher education practices as well as pre-service teachers' responses to such practices. The research is ethnographic, focusing in particular on the discourses produced by Secondary English pre-service teachers in the construction of their subjectivities. This thesis draws from post-critical writing pedagogy, discourse analysis and feminist poststructuralist theory, arguing that subjectivity is fragmented, multiple and fractured rather than fixed and unitary. The research strongly argues that teacher education practices of personalising experience through the use of the genres of narrative, biography and autobiography constrain subjectivity. Furthermore, researching the personal through teacher research and action research 'focuses on the research process rather than the writing process. This research repositions the personal as a product of discourse, rather than personal experience, by repositioning research as writing (Lee 1995/1996, 1998) and discourse analytic techniques as significant in providing Secondary English pre-service teachers with the semiotic space to reconstruct pedagogy. The dominant discursive positions that were made known in relation to the Secondary English pre-service teachers are identified using a grounded theory approach and further elaborated using discourse analysis. The dominant discourses of the teacher education site were also analysed in conjunction with the Secondary English pre-service teachers as part of the emancipatory intention of the study. The initial analysis of data from the first year of the study resulted in the implementation of an interruptor strategy on subjectivity (McWilliam 1995), through the process of research as writing (Lee 1995/1996, 1998), to displace Secondary English pre-service teachers' initial, fixed assumptions of teaching. The deconstructive process of double reading (Grosz 1989; Lather 1996, 2004) as well as collaborative rewriting practices, worked towards displacing, repositioning and in the process redesigning subjectivity and pedagogy. Reciprocity is positioned as a critical and productive part of the study in the displacement and repositioning of subjectivity.
Cosmological particle creation in states of low energy
Creators: name: Degner, Andreas
name: Verch, Rainer
Publisher: name: arXiv
Year: 2009
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The recently proposed states of low energy provide a well-motivated class of reference states for the quantized linear scalar field on cosmological Friedmann-Robertson-Walker spacetimes. The low energy property of a state is localized close to some value of the cosmological time coordinate. We present calculations of the relative cosmological particle production between a state of low energy at early time and another such state at later time. In an exponentially expanding Universe, we find that the particle production shows oscillations in the spatial frequency modes. The basis of the method for calculating the relative particle production is completely rigorous. Approximations are only used at the level of numerical calculation.
description: 24 pages, 7 figures
Holographic Dark Energy Model with Hubble Horizon as an IR Cut-off
Creators: name: Xu, Lixin
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The main task of this paper is to realize a cosmic observational compatible universe in the framework of holographic dark energy model when the Hubble horizon $H$ is taken as the role of an IR cut-off. When the model parameter $c$ of a time variable cosmological constant (CC) $Λ(t)=3c^{2}H^{2}(t)$ becomes time or scale dependent, an extra term enters in the effective equation of sate (EoS) of the vacuum energy $w^{eff}_Λ=-c^2-d\ln c^{2}/3d\ln a$. This extra term can make the effective EoS of time variable CC cross the cosmological boundary and be phantom-like at present. For the lack of a first principle and fundamental physics theory to obtain the form $c^2$, we give a simple parameterized form of $c^2$ as an example. Then the model is confronted by the cosmic observations including SN Ia, BAO and CMB shift parameter $R$. The result shows that the model is consistent with cosmic observations.
description: 9 pages, 2 figures, Published Version
Heartland: for Brass Ensemble (HORN 2)
Creators: name: Elia, Anthony J.
Publisher: name: Columbia University
Year: 2013
Subjects: Music

description: "Heartland" is another work for brass ensemble inspired by the community band performance attended by the composer in Lawrence, Kansas in late June 2013. This work is scored for 2 horns, B-flat trumpet, B-flat cornet, trombone, and Tuba in F. The work is of a more moderate to slow tempo, but can be up to the discretion of the conductor.
Emerging Memory System Design to Improve Memory Reliability and Energy Efficiency
Creators: name: Wang, Yicheng
Publisher: name: University of Illinois at Chicago
Year: 2022
Subjects: Uncategorized

description: Fabrication technology scaling has drastically improved DRAM cell density and thus capacity. However, because shrinking memory cells are less stable and reliable than before, the trend also negatively impacts memory system reliability, security, energy efficiency, and performance. This thesis defense will present three research works to help address those challenges. First, we have designed discreet-PARA, a novel defense mechanism against DRAM rowhammer attacks. The latter is a new security attack that exploits weak DRAM cells by disturbing them with intensive memory accesses to their neighbor rows. The proposed design uses a hybrid of the existing counter-based approach and probabilistic approach. It has very high defense strength, low performance overhead, meanwhile, a small and fixed hardware overhead. It is the first one of this type. Second, we identified a disturbance correlation problem for ECC memory under the rowhammer attack and then proposed a highly efficient scheme to break this correlation. With this new scheme, ECC becomes another layer of defense against rowhammer attacks, drastically improving the overall defense strength. Finally, to address the ever-increasing DRAM refresh energy consumption in high-density DRAM memories, we have designed adaptive dual-refresh, a retention-aware DRAM refresh mechanism. It uses dual and independent refresh mechanisms, namely auto-refresh and target refresh, for DRAM cells of short and long retention times, respectively. The design is novel in that it can make fine-grain adjustments to the auto-refresh period for a given DRAM memory system to maximize energy-saving.
Heavenly powers : Holy See diplomacy toward China
Creators: name: Bozzato, F
Publisher: name: University Of Tasmania
Year: 2023

description: Holy See-China relations have a long and chequered history marked by political as well as cultural conflicts. Since the foundation of the People's Republic of China (PRC), these relations have represented one of the thorniest and most complicated diplomatic questions on the world stage. After a long period of absence of communication, over the last three decades the Holy See and Beijing have held secret or discreet talks. These talks to date, however, have not led to the opening of formal negotiations. The current diplomatic stalemate is mainly due to the PRC's intransigence in demanding the Holy See cede the direction of the Catholic Church in China to China' own governmental organizations and sever diplomatic relations with Taiwan. While the Holy See is leaning toward compromise on the latter request, it can hardly bend to the former. In fact, the Catholic Church regards the exertion of Papal authority over the local Catholic hierarchy as a pillar of its doctrinal and institutional integrity and an essential prerequisite for establishing 'working conditions' to carry on ecclesial activities at the national level. Rome's defence of the Church's unity and independence from secular influence collides with Beijing's pursuit of institutional and ideological control over Catholics in China. This striving for control is rooted in the Chinese state apparatus' conviction that the Catholic Church, because of its organizational virtuosity, and the Holy See's international status and prestige, has a special potential to undermine the Communist Party's authority. Holy See-PRC diplomatic normalization is, therefore, predicated on the solution of the conflict of authority between the Apostolic See and Beijing. In order to understand this conflict and identify possible solutions to it, this study investigates the Holy See's diplomatic policy toward China. This thesis initially explains the unique position that the Holy See occupies in the international system and delivers a diachronic analysis of the evolution of Sino-Pontifical relations by individuating and examining their historical phases. Subsequently, the thesis shifts its focus to contemporary developments and options in Holy See-PRC interaction by analyzing Benedict XVI's 2007 letter to Chinese Catholics. It then investigates the main obstacles to diplomatic progress, including factional dynamics within the Church. Finally, this study explores the potential solutions which - on the basis of political-diplomatic precedents and the tradition of the Catholic Church - the parties could adopt in order to establish formal relations.
Salute: for Brass Ensemble (Bb TRUMPET)
Creators: name: Elia, Anthony J.
Publisher: name: Columbia University
Year: 2013
Subjects: Music

description: This work, titled "Salute," is scored for seven parts/instruments, and is among the works for brass ensemble inspired by the composer's trip to Lawrence, Kansas in late June 2013, where he attended an evening community concert in the downtown park. The seven parts include 2 horns, Piccolo Trumpet (A), Bb Trumpet, Bb Cornet, Trombone, and Bb Tuba. Tempi at discretion of conductor.
Hot Defect Superconformal Field Theory in an External Magnetic Field
Creators: name: Filev, Veselin G.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we investigate the influence of an external magnetic field on a flavoured holographic gauge theory dual to the D3/D5 intersection at finite temperature. Our study shows that the external magnetic field has a freezing effect on the confinement/ deconfinement phase transition. We construct the corresponding phase diagram. We investigate some thermodynamic quantities of the theory. A study of the entropy reveals enhanced relative jump of the entropy at the "chiral" phase transition. A study of the magnetization shows that both the confined and deconfined phases exhibit diamagnetic response. The diamagnetic response in the deconfined phase has a stronger temperature dependence reflecting the temperature dependence of the conductivity. We study the meson spectrum of the theory and analyze the stability of the different phases looking at both normal and quasi-normal semi-classical excitations. For the symmetry breaking phase we analyze the corresponding pseudo-Goldstone modes and prove that they satisfy non-relativistic dispersion relation.
description: 42 pages, 14 figures
Additional file 2 of A predictive tool for the assessment of right ventricular dysfunction in non-high-risk patients with acute pulmonary embolism
Creators: name: Yizhuo Gao
name: Lianghong Chen
name: Jia, Dong
Publisher: name: figshare
Year: 2021
Subjects: subject: Space Science
subject: Medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Hematology

description: Additional file 2. Measurement of cardiac diameter (CTPA images describing the methods used to measure the heart dimensions used in this study).
THE EFFECTIVENESS OF OUTDOOR GAMES IN THE DEVELOPMENT OF CHILDREN'S MOTOR ACTIVITY
Creators: name: G'anieva, M.Yu.
name: Azimova, S.R.
Publisher: name: Zenodo
Year: 2023

description: The presented article provides extensive information on the effectiveness of the use of open games in the development of children's activity, increasing their physical activity. Various changes that occur in their bodies during the game are also mentioned.
Weak disorder strongly improves the selective enhancement of diffusion in a tilted periodic potential
Creators: name: Reimann, Peter
name: Eichhorn, Ralf
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The diffusion of an overdamped Brownian particle in a tilted periodic potential is known to exhibit a pronounced enhancement over the free thermal diffusion within a small interval of tilt-values. Here we show that weak disorder in the form of small, time-independent deviations from a strictly spatially periodic potential may further boost this diffusion peak by orders of magnitude. Our general theoretical predictions are in excellent agreement with experimental observations.
description: Phys. Rev. Lett., in press
Additional file 1 of Development and evaluation of competency-based curriculum for continuing professional development among military nurses: a mixed methods study
Creators: name: Ma, Huijuan
name: Niu, Aifang
name: Sun, Li
name: Luo, Yu
Publisher: name: figshare
Year: 2022
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer
subject: Science Policy
subject: Infectious Diseases
subject: FOS: Health sciences

description: Additional file 1.
Finite source effects in microlensing: A precise, easy to implement, fast and numerical stable formalism
Creators: name: Lee, C. -H.
name: Riffeser, A.
name: Seitz, S.
name: Bender, R.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The goal of this paper is to provide a numerically fast and stable description for the microlensing amplification of an extended source (either uniform or limb-darkened) that holds in any amplification regime. We show that our method of evaluating the amplification can be implemented into a light-curve fitting routine using the Levenberg-Marquardt algorithm. We compare the accuracy and computation times to previous methods that either work in the high-amplification regime only, or require special treatments due to the singularity of elliptic integrals. In addition, we also provide the equations including finite lens effects in microlensing light curves. We apply our methods to the MACHO-1995-BLG-30 and the OGLE-2003-BLG-262 events and obtain results consistent to former studies. We derive an upper limit for the OGLE-2003-BLG-262 event lens size. We conclude that our method allows to simultaneously search for point-source and finite-source microlensing events in future large area microlensing surveys in a fast manner.
description: 11 pages, 12 figures, published in ApJ
String Octet #2 (2nd Movement~Violin 1)
Creators: name: Elia, Anthony J.
Publisher: name: Columbia University
Year: 2013
Subjects: Music

description: The String Octet #2 was written during the summer of 2013. A previous String Octet was written in recent years, but not fully completed. The present work was written for various string-playing colleagues and friends, including Maureen Murchie (violin), Vita Wallace (violin), Sona Hairabedian (‘Cello), and Judy Donn (‘Cello). The work is in three movements, and both full scores and individual parts are all available on Academic Commons. Tempi and dynamics may vary at discretion of players, but should reflect the feel of the individual movement.
Single-cluster dynamics for the random-cluster model
Creators: name: Deng, Youjin
name: Qian, Xiaofeng
name: Blote, Henk W. J.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We formulate a single-cluster Monte Carlo algorithm for the simulation of the random-cluster model. This algorithm is a generalization of the Wolff single-cluster method for the $q$-state Potts model to non-integer values $q>1$. Its results for static quantities are in a satisfactory agreement with those of the existing Swendsen-Wang-Chayes-Machta (SWCM) algorithm, which involves a full cluster decomposition of random-cluster configurations. We explore the critical dynamics of this algorithm for several two-dimensional Potts and random-cluster models. For integer $q$, the single-cluster algorithm can be reduced to the Wolff algorithm, for which case we find that the autocorrelation functions decay almost purely exponentially, with dynamic exponents $z_{\rm exp} =0.07 (1), 0.521 (7)$, and $1.007 (9)$ for $q=2, 3$, and 4 respectively. For non-integer $q$, the dynamical behavior of the single-cluster algorithm appears to be very dissimilar to that of the SWCM algorithm. For large critical systems, the autocorrelation function displays a range of power-law behavior as a function of time. The dynamic exponents are relatively large. We provide an explanation for this peculiar dynamic behavior.
description: 7 figures, 4 tables
String Octet #2 (1st Movement SCORE)
Creators: name: Elia, Anthony J.
Publisher: name: Columbia University
Year: 2013
Subjects: Music

description: The String Octet #2 was written during the summer of 2013. A previous String Octet was written in recent years, but not fully completed. The present work was written for various string-playing colleagues and friends, including Maureen Murchie (violin), Vita Wallace (violin), Sona Hairabedian (‘Cello), and Judy Donn (‘Cello). The work is in three movements, and both full scores and individual parts are all available on Academic Commons. Tempi and dynamics may vary at discretion of players, but should reflect the feel of the individual movement.
Chemical applications of pulsed and steady-state nuclear magnetic resonance
Creators: name: Shaw, Keith Newman
Publisher: name: University of British Columbia
Year: 2011

description: A general matrix formulation for the effects of chemical exchange processes in high resolution nuclear magnetic resonance (NMR) has been developed which allows a concise description and efficient numerical calculation of exchange modified lineshapes for an arbitrary number of spin-sites. A complete description of all rate processes is contained in a single matrix, and both first- and second-order spin systems (as described in terms of a spin density matrix) are accommodated through specific forms for a spin-site frequency matrix. The hindered rotation about the N-C bond in substituted amides has been studied on a comparative basis using free energies of activation derived from first-order rate constants obtained by complete analyses of digital lineshape data. A versatile FORTRAN computer program has been.used for routine iterative lineshape fitting and it has been shown that, even with the precision now attainable using this technique, the most reliable kinetic parameter is the free energy of activation. Huckel H-MO and semi-empirical SCF-LCAO-MO calculations have been used in a description of the electronic factors determining the barriers to hindered rotation and the charge distributions in the amides studied experimentally. Application of the Fourier transform in high resolution NMR has also been considered in detail, with particular emphasis upon quantitative lineshape studies using the data available from simple pulsed NMR experiments. The advantages of the pulse method with digital data acquisition have been examined, and the numerical computations and corrective factors involved have been incorporated into a general and efficient computer program.
Additional file 3 of A predictive tool for the assessment of right ventricular dysfunction in non-high-risk patients with acute pulmonary embolism
Creators: name: Yizhuo Gao
name: Lianghong Chen
name: Jia, Dong
Publisher: name: figshare
Year: 2021
Subjects: subject: Space Science
subject: Medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Hematology

description: Additional file 3. Web-based calculator for predicting RV dysfunction (an image of the web-based calculator developed from the nomogram).
Selecting Rare Books and Special Collections for Digitization
Creators: name: Gertz, Janet Elaine
Publisher: name: Columbia University
Year: 2012
Subjects: Library science

description: This paper discusses selection of rare materials for digital conversion. Selection criteria guide decisions on whether materials should be digitized, whether they may be digitized, and whether they can be digitized. Criteria include whether the item or collection has sufficient value to justify digitization, whether digitization is appropriate for materials of this type, whether digitization can achieve the desired goals, whether the institution has infrastructure to carry out a digitization project and preserve the digital product, whether it has the intellectual property rights to create and disseminate digital versions, and whether the cost is appropriate.
Exploiting Channel Correlations - Simple Interference Alignment Schemes with no CSIT
Creators: name: Jafar, Syed A.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: We explore 5 network communication problems where the possibility of interference alignment, and consequently the total number of degrees of freedom (DoF) with channel uncertainty at the transmitters are unknown. These problems share the common property that in each case the best known outer bounds are essentially robust to channel uncertainty and represent the outcome with interference alignment, but the best inner bounds -- in some cases conjectured to be optimal -- predict a total collapse of DoF, thus indicating the infeasibility of interference alignment under channel uncertainty at transmitters. Our main contribution is to show that even with no knowledge of channel coefficient values at the transmitters, the knowledge of the channels' correlation structure can be exploited to achieve interference alignment. In each case, we show that under a staggered block fading model, the transmitters are able to align interference without the knowledge of channel coefficient values. The alignment schemes are based on linear beamforming -- which can be seen as a repetition code over a small number of symbols -- and involve delays of only a few coherence intervals.
description: 18 pages, 6 figures
Comparative genomic analysis of strong biofilm-forming Klebsiella pneumoniae isolates uncovers novel ISEcp1-mediated chromosomal integration of a full plasmid-like sequence
Creators: name: Hamed, Samira M.
name: Mohamed, Hend O.
name: Ashour, Hossam M.
name: Fahmy, Lamiaa I.
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: Molecular Biology
subject: Environmental Sciences not elsewhere classified
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: Biological Sciences not elsewhere classified
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Virology

description: The goal of the current study was to elucidate the genomic background of biofilm formation in Klebsiella pneumoniae. Clinical isolates were screened for biofilm formation using the crystal violet assay. Antimicrobial resistance (AMR) profiles were assessed by disk diffusion and broth microdilution tests. Biofilm formation was correlated to virulence and resistance genes screened by PCR. Draft genomes of three isolates that form strong biofilm were generated by Illumina sequencing. Only the siderophore-coding gene iutA was significantly associated with more pronounced biofilm formation. ST1399-KL43-O1/O2v1 and ST11-KL15-O4 were assigned to the multidrug-resistant strain K21 and the extensively drug-resistant strain K237, respectively. ST1999-KL38-O12 was assigned to K57. Correlated with CRISPR/Cas distribution, more plasmid replicons and prophage sequences were identified in K21 and K237 compared to K57. The acquired AMR genes (blaOXA-48, rmtF, aac(6′)-Ib and qnrB) and (blaNDM-1, blaCTX-M, aph(3′)-VI, qnrS, and aac(6′)-Ib-cr) were found in K237 and K21, respectively. The latter showed a novel ISEcp1-mediated chromosomal integration of replicon type IncM1 plasmid-like structure harboring blaCTX-M-14 and aph(3′)-VI that uniquely interrupted rcsC. The plasmid-mediated heavy metal resistance genes merACDEPRT and arsABCDR were spotted in K21, which also exclusively carried the acquired virulence genes mrkABCDF and the hypervirulence-associated genes iucABCD-iutA, and rmpA/A2. Pangenome analysis revealed NTUH-K2044 accessory genes most frequently shared with K21. While less virulent to Galleria mellonella than ST1999 (K57), the strong biofilm former, multidrug-resistant, NDM-producer K. pneumoniae K21 (ST1399-KL43-O1/O2v1) carries a novel chromosomally integrated plasmid-like structure and hypervirulence-associated genes and represents a serious threat to countries in the area.
Intramolecular photochemical cycloaddition of nonconjugated dienes
Creators: name: Boire, Brian Anthony
Publisher: name: University of British Columbia
Year: 2011

description: The photolysis of isogermacrone (68) has been investigated. Exclusive "straight" cycloaddition occurs to form syn (70) and anti (71) 1,7- dimethyl-4-isopropylidene-tricyclo[5.3.0.0[sup 2,6]decane-3-one. The structures of the photoproducts have been confirmed by an independent synthesis. A mechanism, for the photolysis of 68, involving an intermediate 1,4-diradical is postulated in order to account for the stereochemistry of the products. The direct and triplet-sensitized photochemistry of the three geometric isomers of diethyl deca-2,8-diene-l,10-dioate (79 - 81) has been studied. The triplet reaction is one of rapid cis,trans isomerization accompanied by slower 2 + 2 internal cyclization in a "straight" manner to give four of the six possible stereoisomeric diethyl bicyclo[4.2.0]-octane-7,8-dicarboxylates (82 - 85). The stereochemistry of these products as well as the triplet nature of the reaction are indicative of a two step mechanism involving 1,4-diradical intermediates. Possible explanations for the direction of initial bond formation in these reactions are also discussed. The direct (singlet) reaction of the deca-2,8-diene-l,10-dioates is one of trans to cis isomerization followed by α,β to β,γ double bond migration from the Cis isomer; the sole deconjugated product is diethyl trans,trans-deca-3,7-diene-l,10-dioate. A possible explanation for this stereoselectivity is advanced. Reasons for an investigation of the photolysis of cyclonona-2,6-dienone (128) and a scheme for its synthesis are presented.
Stabat Mater (Part 1 of The Marian Cycle for Unaccompanied Voices, 56 pp.)
Creators: name: Elia, Anthony J.
Publisher: name: Columbia University
Year: 2013
Subjects: Music

description: "The Marian Cycle" is an extensive 12-part work, based on 12 Latin texts about the Virgin Mary. The composer started writing this work in January 2013, and the settings are for mixed unaccompanied chorus, in various arrangements of female and male voices. The first work in the series, the Stabat Mater, was completed in March 2013, and rehearsed with Vita and Ishmael Wallace at that time in NYC. The 12 parts are: 1) Stabat Mater, 2) Ave Regina Caelorum, 3) Alma Redemptoris Mater, 4) Ave Maris Stella, 5) Angelus, 6) Flos Carmeli, 7) Ave Maria, 8) Magnificat, 9) Memorare, 10) Regina Coeli, 11) Salve Regina, 12) Sub Tuum Praesidum. (NB: The composer has also written a “Magnificat” for his Christmas Oratorio “Nativitatis Christi,” which is scored for mixed chorus and organ.) All of these parts will be available on Academic Commons.