cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Ellipticals at $z=0$ from Self-Consistent Hydrodynamical Simulations: Comparison with SDSS Structural and Kinematical Data
Creators: name: Sáiz, A.
name: Domínguez-Tenreiro, R.
name: Serna, A.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present results of an analysis of the structural and kinematical properties of a sample of elliptical-like objects (ELOs) identified in four hydrodynamical, self-consistent simulations run with the DEVA code (Serna et al. 2003). Star formation has been implemented in the code through a simple phenomenological parameterization, that takes into account stellar physics processes only implicitly through the values of a threshold gas density, $ρ_{\rm g,thres}$, and an efficiency parameter, $c_*$. The four simulations operate in the context of a $Λ$CDM cosmological model consistent with observations, resolve ELO mass assembly at scales up to $\simeq$ 2 kpc, and differ in the values of their star formation parameters. Stellar masses, projected half-mass radii and central l.o.s. velocity dispersions, $σ_{\rm los, 0}$, have been measured on the ELO sample and their values compared with data from the Sloan digital sky survey. For the first time in self-consistent simulations, a good degree of agreement has been shown, including the Faber-Jackson and the $D_n - σ_{\rm los, 0}$ relations, among others, but only when particular values of the $ρ_{\rm g,thres}$ and $c_*$ parameters are used. This demostrates the effect that the star formation parameterization has on the ELO mass distribution. Additionally, our results suggest that it is not strictly necessary, at the scales resolved in this work, to appeal to energy sources other than gravitational (as for example supernovae feedback effects) to account for the structure and kinematics of large ellipticals.
Energy-momentum and angular momentum of Goedel universes
Creators: name: Dabrowski, Mariusz P.
name: Garecki, Janusz
Publisher: name: arXiv
Year: 2003
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We discuss the Einstein energy-momentum complex and the Bergmann-Thomson angular momentum complex in general relativity and calculate them for space-time homogeneous Goedel universes. The calculations are performed for a dust acausal model and for a scalar-field causal model. It is shown that the Einstein pseudotensor is traceless, not symmetric, the gravitational energy is "density" is negative and the gravitational Poynting vector vanishes. Significantly, the total (gravitational and matter) energy "density" fro the acausal model is zero while for the casual model it is negative.The Bergmann-Thomson angular momentum complex does not vanish for both Gödel models.
description: an amended version, 24 pages, accepted to PRD
Improving the efficiency of $G_0W_0$ calculations with approximate spectral decompositions of dielectric matrices
Creators: name: Yang, Han
name: Govoni, Marco
name: Galli, Giulia
Publisher: name: arXiv
Year: 2019
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Recently it was shown that the calculation of quasiparticle energies using the $G_0W_0$ approximation can be performed without computing explicitly any virtual electronic states, by expanding the Green function and screened Coulomb interaction in terms of the eigenstates of the static dielectric matrix. Avoiding the evaluation of virtual electronic states leads to improved efficiency and ease of convergence of $G_0W_0$ calculations. Here we propose a further improvement of the efficiency of these calculations, based on an approximation of density-density response functions of molecules and solids. The approximation relies on the calculation of a subset of eigenvectors of the dielectric matrix using the kinetic operator instead of the full Hamiltonian, and it does not lead to any substantial loss of accuracy for the quasiparticle energies. The computational savings introduced by this approximation depend on the system, and they become more substantial as the number of electrons increases.
title: Carbon Ions for Hypoxic Tumors: Are We Making the Most of Them?
Creators: name: Sokol, Olga
name: Durante, Marco
Publisher: name: MDPI
Year: 2024

description: Hypoxia, which is associated with abnormal vessel growth, is a characteristic feature of many solid tumors that increases their metastatic potential and resistance to radiotherapy. Carbon-ion radiation therapy, either alone or in combination with other treatments, is one of the most promising treatments for hypoxic tumors because the oxygen enhancement ratio decreases with increasing particle LET. Nevertheless, current clinical practice does not yet fully benefit from the use of carbon ions to tackle hypoxia. Here, we provide an overview of the existing experimental and clinical evidence supporting the efficacy of C-ion radiotherapy in overcoming hypoxia-induced radioresistance, followed by a discussion of the strategies proposed to enhance it, including different approaches to maximize LET in the tumors.
An authentication protocol based on chaos and zero knowledge proof
Creators: name: Major, Will
name: Buchanan, William J
name: Ahmad, Jawad
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cryptography and Security (cs.CR)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: Port Knocking is a method for authenticating clients through a closed stance firewall, and authorising their requested actions, enabling severs to offer services to authenticated clients, without opening ports on the firewall. Advances in port knocking have resulted in an increase in complexity in design, preventing port knocking solutions from realising their potential. This paper proposes a novel port knocking solution, named Crucible, which is a secure method of authentication, with high usability and features of stealth, allowing servers and services to remain hidden and protected. Crucible is a stateless solution, only requiring the client memorise a command, the server's IP and a chosen password. The solution is forwarded as a method for protecting servers against attacks ranging from port scans, to zero-day exploitation. To act as a random oracle for both client and server, cryptographic hashes were generated through chaotic systems.
description: J. Nonlinear Dyn (2020)
On the estimation of specific interfacial areas in aerated flows
Creators: name: Kramer, Matthias
Publisher: name: arXiv
Year: 2025
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: This work provides a short clarification on the definition of specific interfacial areas in aerated flows, thereby distinguishing between the specific interfacial area related to the volume of an air-water mixture, and the specific interfacial area related to the water volume. This distinction is important when it comes to solving the air-water mass transfer equation, as there has been some misconception on the past. It is hoped that this contribution will help to clarify on these basic fundamentals, which is anticipated to be important for the future development and application of advanced air-water mass transfer models to aerated flows.
description: 9 pages, 2 figures, accepted for publication
Generalized Fierz identities
Creators: name: Nieves, Jose F.
name: Pal, Palash B.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Low energy weak interactions calculations with fermions frequently involve a superposition of quartic products of Dirac spinors, in which the order of the spinors is not the same in all the contributing terms. A common trick that is used to bring them to a uniform ordering is the Fierz transformation. We show that the standard Fierz rearrangement formula quoted in textbooks is one element of a class of transformations of a quartic product amplitude, under which the spinors are rearranged with different orderings and, in the general case, some or all of the spinors are transformed to their Lorentz-invariant complex conjugate form. We give a pedagogical derivation of the explicit forms of all such transformation matrices. In addition to the usual Lorentz scalar quartic products, we consider pseudoscalar ones as well. Such manipulations and formulas are useful, in particular, when some of the fermions involved are Majorana particles.
description: 18 pages, Latex
Out of pocket and catastrophic health expenditures of families from seeking pediatric surgical care in a tertiary hospital in Tanzania
Creators: name: Philipo, Godfrey Sama
Publisher: name: The University of British Columbia
Year: 2023

description: Introduction: Approximately 1.8 billion of children, majority being from low- and middle- income countries, lack access to safe and affordable surgical care. There is limited data on financial implication to families from seeking and receiving surgical care for their children. We aimed to assess the burden and factors associated with catastrophic health expenditures (CHE) and the risk of impoverishment among families of children receiving surgery in Tanzania. Methodology: This was a retrospective study. Demographics, clinical and financial data were collected from parents or caregivers of children undergoing surgery. CHE and the risk of impoverishment was calculated using the formula by Shrime et al. We used descriptive statistics, and compared the studies using chi-square and multivariate logistic regression analysis considering statistically significant results at p<0.05. CHE and risk of impoverishment was the primary and secondary outcomes respectively.Results The median total OOPE was US$ 66.3 (IQR: US$ 21.1 – US$181.2). The median OOPE from medical and nonmedical costs were $ 0 (IQR: US$ 0 – US$65.5) and US$6.0 (IQR: US$0.9 - US$21.4) respectively. The prevalence of families at risk of CHE was 46.1% (71/154). Marital status (p < 0.001), health insurance (p=0.02), electricity (p=0.01), referral status (p=0.001) use of private car to the referral center (p=0.04) and public transport (0.02) were found to be predictors of outcomes. Conclusion and Discussion: Seeking children surgical care is may push families into the risk of CHE and impoverishment resulting from OOPE. In addition to existing strategies, bringing care closer to the patient may be an effective intervention and may protect families from CHE and reduce risk of impoverishment.
Observables in quantum field theory on a collapsing black hole background
Creators: name: Berger, Micheal S.
name: Liu, Zhi
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the quantum radiation from a curved background using scalar observables constructed from the (1+1) dimensional renormalized stress-energy tensor (RSET). We compute energy density $\cal U$, flux $\cal F$ and pressure $\cal P$ for an arbitrary collapse scenario and an arbitrary observer. The results show a clear structure: $\cal F - \cal U$ represents the collapse-independent ingoing modes, $\cal F + \cal U$ represents the collapse-dependent outgoing modes and $\cal P - \cal U$ represents the trace anomaly. We also compute the observables constructed from the perception renormalized stress-energy tensor (PeRSET). We find they have the same collapse-dependent contribution comparing to their RSET-related counterparts. For free-falling observers, in particular, the PeRSET-related observables are the same as the corresponding RSET-related ones, except the energy densities differ by the trace anomaly.
description: 6 pages, 3 figures, the paper is rewritten, additional results on perceived observables added
Vector constants of the motion and orbits in the Coulomb/Kepler problem
Creators: name: Munoz, Gerardo
Publisher: name: arXiv
Year: 2003
Subjects: subject: Classical Physics (physics.class-ph)
subject: Physics Education (physics.ed-ph)
subject: FOS: Physical sciences

description: The equation for the conic sections describing the possible orbits in a potential $V \sim r^{-1}$ is obtained by means of a vector constant of the motion differing from the traditional Laplace-Runge-Lenz vector.
description: 5 pages, no figures
New four-dimensional solutions of the Jacobi equations for Poisson structures
Creators: name: Hernández-Bermejo, Benito
Publisher: name: arXiv
Year: 2019
Subjects: subject: Mathematical Physics (math-ph)
subject: Analysis of PDEs (math.AP)
subject: Dynamical Systems (math.DS)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: A new four-dimensional family of skew-symmetric solutions of the Jacobi equations for Poisson structures is characterized. As a consequence, previously known types of Poisson structures found in a diversity of physical situations appear to be obtainable as particular cases of the new family of solutions. Additionally, it is possible to apply constructive methods for the explicit determination of fundamental properties of those solutions, such as their Casimir invariants, symplectic structure and the algorithm for the reduction to the Darboux canonical form, which have been reported only for a limited sample of known finite-dimensional Poisson structures. Moreover, the results developed are valid globally in phase space, thus ameliorating the usual scope of Darboux theorem which is of local nature.
Observational study of ezetimibe discontinuation in primary care practices in the UK
Creators: name: Hall, Gillian C.
name: Vian Amber
name: O’Regan, Chris
name: Jameson, Kevin
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Medicine
subject: Pharmacology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy
subject: Computational Biology

description: We investigated the circumstances of ezetimibe discontinuation as its prescribing had been discouraged in some publications. Adults on stable lipid-modifying therapy (LMT) including ezetimibe, who then had >8 weeks cessation in their prescribed ezetimibe regimen (2010–2011) were identified from THIN UK primary care database. Lipid values and parallel changes to other LMT were described overall and in a sub-group with a history of diabetes, cardiovascular disease or familial hypercholesterolaemia (high-risk group). Ezetimibe therapy stopped in 7087 patients after a mean of 38 months; 67.0% were in the high-risk group. No lipid readings were recorded for 16.1% of patients in the year before and 26.2% in the year after ezetimibe stopped; 11.0% and 12.4% in the high-risk group respectively. In the prior year, 60.2% patients with any lipid reading had a total cholesterol (T-cholesterol) <5 mmol/l and 59.2% had a T-cholesterol <5 mmol/l and LDL-cholesterol <3 mmol/l. In the high-risk group, 66.8% had a T-cholesterol <5 mmol/l, 38.9% had either a T-cholesterol <4 or a LDL-cholesterol <2 mmol/l and 29.4% had reached both targets. In both populations, 42% patients had 6 months’ follow-up after ezetimibe stopped with no change to other LMT. An LMT change within 8 weeks (19%) was usually a new statin while 27% overall had a further ezetimibe prescription after 8–26 weeks. Only absolute lipid values were included, as percentage change from baseline level may not be reliable. The study included a larger proportion of patients in Scotland relative to the UK population. Prescribed ezetimibe often stopped without either a recent lipid value or attainment of optimal, or sometimes minimum, lipid targets. Patients did not always receive parallel intensification of other LMT or a further ezetimibe prescription within 6 months.
Picard groups of the moduli spaces of semistable sheaves I
Creators: name: Bhosle, Usha N
Publisher: name: arXiv
Year: 2004
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14H60, 14C22, 14F05

description: We compute the Picard group of the moduli space $U'$ of semistable vector bundles of rank $n$ and degree $d$ on an irreducible nodal curve $Y$ and show that $U'$ is locally factorial. We determine the canonical line bundles of $U'$ and $U'_L$, the subvariety consisting of vector bundles with a fixed determinant. For rank 2, we compute the Picard group of other strata in the compactification of $U'$.
description: 16 pages, no figures, no tables
Mesoscopic Cavity Quantum Electrodynamics with Quantum Dots
Creators: name: Childress, L. I.
name: Sorensen, A. S.
name: Lukin, M. D.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We describe an electrodynamic mechanism for coherent, quantum mechanical coupling between spacially separated quantum dots on a microchip. The technique is based on capacitive interactions between the electron charge and a superconducting transmission line resonator, and is closely related to atomic cavity quantum electrodynamics. We investigate several potential applications of this technique which have varying degrees of complexity. In particular, we demonstrate that this mechanism allows design and investigation of an on-chip double-dot microscopic maser. Moreover, the interaction may be extended to couple spatially separated electron spin states while only virtually populating fast-decaying superpositions of charge states. This represents an effective, controllable long-range interaction, which may facilitate implementation of quantum information processing with electron spin qubits and potentially allow coupling to other quantum systems such as atomic or superconducting qubits.
description: 8 pages, 5 figures
Bifurcation structure of a swept source laser
Creators: name: Kovalev, A. V.
name: Dmitriev, P. S.
name: Vladimirov, A. G.
name: Pimenov, A.
name: Huyet, G.
name: Viktorov, E. A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optics (physics.optics)
subject: Chaotic Dynamics (nlin.CD)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We numerically analyze a delay differential equation model of a short-cavity semiconductor laser with an intracavity frequency swept filter and reveal a complex bifurcation structure responsible for the asymmetry of the output characteristics of this laser. We show that depending on the direction of the frequency sweep of a narrowband filter, there exist two bursting cycles determined by different parts of a continuous-wave solutions branch.
description: 5 pages, 5 figures
Gauged B-3L_τ, low-energy unification and proton decay
Creators: name: Pal, Palash B.
name: Sarkar, Utpal
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We point out that if there is a gauged $B-3L_τ$ symmetry at low energy, it can prevent fast proton decay. This may help building models with theories with extra dimensions at the TeV scale. For purpose of illustration we present an explicit model with large extra dimensions. The Higgs required for a realistic fermion masses and mixing are included. The problem of neutrino masses are solved with triplet Higgs scalars. The proton remains stable even after the $B-3L_τ$ symmetry breaking.
description: 8 pages, Latex
Addition of a 5-lipoxygenase-activating protein inhibitor to an inhaled corticosteroid (ICS) or an ICS/long-acting beta-2-agonist combination in subjects with asthma
Creators: name: Snowise, Neil G.
name: Clements, Diane
name: Shu-Yen Ho
name: Follows, Richard M.A.
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biochemistry
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Cell Biology
subject: Molecular Biology
subject: Neuroscience
subject: Physiology
subject: Pharmacology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 60506 Virology

description: To investigate the clinical benefits of ‘add-on’ therapy with GSK2190915 in combination with the inhaled corticosteroid (ICS) fluticasone propionate (FP) and the ICS/long-acting beta 2 agonist (LABA) combination FP/salmeterol in asthmatic subjects. Both studies were cross-over, randomized, double-blind, double-dummy and placebo-controlled in subjects with a forced expiratory volume in 1 second (FEV1) best of >50 and ≤80% of predicted. Add-on to ICS: Subjects (n = 162) aged ≥12 years received FP 100 µg twice daily (BID) plus GSK2190915 100 mg once daily (QD); GSK2190915 300 mg QD; montelukast 10 mg QD; salmeterol 50 µg BID or placebo. Add-on to ICS/LABA: Female subjects (n = 145) aged ≥18 years received FP/salmeterol 250/50 µg BID plus GSK2190915 300 mg QD, montelukast 10 mg QD or placebo. In both studies, the primary endpoint was trough FEV1 at the end of the treatment period. Secondary endpoints included a range of objective and patient-reported measures of efficacy. Add-on to ICS: There was no statistically significant difference in the primary endpoint between either dose of GSK2190915 (add-on to FP) and placebo. Nominally statistically significant increases were demonstrated for GSK2190915 300 mg add-on relative to placebo for mean morning peak expiratory flow (p = 0.049), percentage of symptom-free days (p = 0.035) and percentage of symptom-free 24 h periods (p = 0.030). Add-on to ICS/LABA: There were no statistically significant differences on the primary endpoint between treatment regimens. Nominally statistically significant decreases were demonstrated in daytime (p = 0.023), night-time (p = 0.041) and 24 h (p = 0.019) short-acting beta 2 agonist usage with FP/salmeterol + GSK2190915 300 mg vs. FP/salmeterol + placebo. There was no clinically significant improvement in the primary endpoint following GSK2190915 add-on treatment; however, improvements in a range of secondary endpoints and biomarker data provided evidence of pharmacological activity. Improvements in response to background treatment may have been a limitation in both studies. Clinicaltrials.gov identifiers: NCT01156792 and NCT01248975.
A three-dimensional calculation of atmospheric neutrinos
Creators: name: Barr, G. D.
name: Gaisser, T. K.
name: Lipari, P.
name: Robbins, S.
name: Stanev, T.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A Monte-Carlo calculation of the atmospheric neutrino fluxes [1,2] has been extended to take account of the three-dimensional (3D) nature of the problem, including the bending of secondary particles in the geomagnetic field. Emphasis has been placed on minimizing the approximations when introducing the 3D considerations. In this paper, we describe the techniques used and quantify the effects of the small approximations which remain. We compare 3D and 1D calculations using the same physics input in order to evaluate the conditions under which the 3D calculation is required and when the considerably simpler 1D calculation is adequate. We find that the 1D and 3D results are essentially identical for neutrino energy greater than 5 GeV except for small effects in the azimuthal distributions due to bending of the secondary muon by the geomagnetic field during their propagation in the atmosphere.
description: 24 pages, 15 figures, LaTeX, to be submitted to Physical Review D
Reservoir ecological operation by quantifying outflow disturbance to aquatic community dynamics
Creators: name: Yibo Wang
Publisher: name: figshare
Year: 2021
Subjects: subject: 90509 Water Resources Engineering
subject: FOS: Civil engineering
subject: 60207 Population Ecology
subject: FOS: Biological sciences

description: Data and Code that were used in study on “Reservoir ecological operation by quantifying outflow disturbance to aquatic community dynamics” by Yibo Wang et al., 2021.
Odum Institute Archives services overview
Creators: name: Crabtree, Jonathan
Publisher: name: Zenodo
Year: 2015

description: The Odum Institute for Research in Social Science was founded in 1924 by Howard Washington Odum, making it the oldest university-based interdisciplinary social science research institute in the United States. We provide education, training, data collection, and archive services to researchers both within and beyond the University of North Carolina at Chapel Hill. Our mission is to facilitate scientifically rigorous social science research that contributes to better lives for the citizens of North Carolina and the world.
Market Price of Trading Liquidity Risk and Market Depth
Creators: name: Kijima, Masaaki
name: Ting, Christopher
Publisher: name: arXiv
Year: 2019
Subjects: subject: Trading and Market Microstructure (q-fin.TR)
subject: Econometrics (econ.EM)
subject: Computational Finance (q-fin.CP)
subject: Mathematical Finance (q-fin.MF)
subject: Computation (stat.CO)
subject: FOS: Economics and business
subject: FOS: Computer and information sciences

description: Price impact of a trade is an important element in pre-trade and post-trade analyses. We introduce a framework to analyze the market price of liquidity risk, which allows us to derive an inhomogeneous Bernoulli ordinary differential equation. We obtain two closed form solutions, one of which reproduces the linear function of the order flow in Kyle (1985) for informed traders. However, when traders are not as asymmetrically informed, an S-shape function of the order flow is obtained. We perform an empirical intra-day analysis on Nikkei futures to quantify the price impact of order flow and compare our results with industry's heuristic price impact functions. Our model of order flow yields a rich framework for not only to estimate the liquidity risk parameters, but also to provide a plausible cause of why volatility and correlation are stochastic in nature. Finally, we find that the market depth encapsulates the market price of liquidity risk.
description: 46 Pages, 12 Figures, To appear in the International Journal of Theoretical and Applied Finance
MPEC 2024-B44 : 2024 BU
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 BU

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.
Detection of squeezed phonons in pump-probe spectroscopy
Creators: name: Lakehal, Massil
name: Schiró, Marco
name: Eremin, Ilya M.
name: Paul, Indranil
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Robust engineering of phonon squeezed states in optically excited solids has emerged as a promising tool to control and manipulate their properties. However, in contrast to quantum optical systems, detection of phonon squeezing is subtle and elusive, and an important question is what constitutes an unambiguous signature of it. The state of the art involves observing oscillations at twice the phonon frequency in time resolved measurements of the out of equilibrium phonon fluctuation. Using Keldysh formalism we show that such a signal is a necessary but not a sufficient signature of a squeezed phonon, since we identify several mechanisms that do not involve squeezing and yet which produce similar oscillations. We show that a reliable detection requires a time and frequency resolved measurement of the phonon spectral function.
Massive higher spin supermultiplets unfolded
Creators: name: Khabarov, M. V.
name: Zinoviev, Yu. M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we construct an unfolded formulation for the massive higher spin N=1 supermultiplets in four dimensional AdS space. We use the same frame-like gauge invariant multispinor formalism that was used previously for their Lagrangian formulation. We also consider an infinite spin limit of such supermultiplets.
description: 32 pages, 2 figures
Optically enriched and guided dynamics of active skyrmions
Creators: name: Sohn, Hayley R. O.
name: Liu, Changda D.
name: Voinescu, Robert
name: Chen, Zezhang
name: Smalyukh, Ivan I.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Light provides a powerful means of controlling physical behavior of materials but is rarely used to power and guide active matter systems. We demonstrate optical control of liquid crystalline topological solitons dubbed "skyrmions", which recently emerged as highly reconfigurable inanimate active particles capable of exhibiting emergent collective behaviors like schooling. Because of a chiral nematic liquid crystal's natural tendency to twist and its facile response to electric fields and light, it serves as a testbed for dynamic control of skyrmions and other active particles. Using ambient-intensity unstructured light, we demonstrate large-scale multifaceted reconfigurations and unjamming of collective skyrmion motions powered by oscillating electric fields and guided by optically-induced obstacles and patterned illumination.
Building a linguistic corpus from bee dance data
Creators: name: Paijmans, J. J.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: This paper discusses the problems and possibility of collecting bee dance data in a linguistic \textit{corpus} and use linguistic instruments such as Zipf's law and entropy statistics to decide on the question whether the dance carries information of any kind. We describe this against the historical background of attempts to analyse non-human communication systems.
Adding flexibility to clinical trial designs: an example-based guide to the practical use of adaptive designs.
Creators: name: Burnett, Thomas
name: Mozgunov, Pavel
name: Pallmann, Philip
name: Villar, Sofia S
name: Wheeler, Graham M
name: Jaki, Thomas
Publisher: name: Springer Science and Business Media LLC
Year: 2020
Subjects: Efficient methods
Enrichment designs
Innovative trials
Multi-arm multi-stage platform trials
Novel designs
Humans
Prospective Studies
Research Design
Sample Size
Adaptive Clinical Trials as Topic

description: Funder: Cancer Research UK; doi: http://dx.doi.org/10.13039/501100000289
description: Adaptive designs for clinical trials permit alterations to a study in response to accumulating data in order to make trials more flexible, ethical, and efficient. These benefits are achieved while preserving the integrity and validity of the trial, through the pre-specification and proper adjustment for the possible alterations during the course of the trial. Despite much research in the statistical literature highlighting the potential advantages of adaptive designs over traditional fixed designs, the uptake of such methods in clinical research has been slow. One major reason for this is that different adaptations to trial designs, as well as their advantages and limitations, remain unfamiliar to large parts of the clinical community. The aim of this paper is to clarify where adaptive designs can be used to address specific questions of scientific interest; we introduce the main features of adaptive designs and commonly used terminology, highlighting their utility and pitfalls, and illustrate their use through case studies of adaptive trials ranging from early-phase dose escalation to confirmatory phase III studies.
Close-Coupling Time-Dependent Quantum Dynamics Study of the H + HCl Reaction
Creators: name: Yao, Li
name: Han, Ke-Li
name: Song, He-Shan
name: Zhang, Dong-Hui
Publisher: name: arXiv
Year: 2003
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: The paper presents a theoretical study of the dynamics of the H + HCl system on the potential energy surface (PES) of Bian and Werner (Bian, W.; Werner, H. -J., J. Chem. Phys. 2000, 112, 220). A time-dependent wave packet approach was employed to calculate state-to-state reaction probabilities for the exchanged and abstraction channels. The most recent PES for the system has been used in the calculations. Reaction probabilities have also been calculated for several values of the total angular momentum J > 0. Those have then been used to estimate cross sections and rate constants for both channels. The calculated cross sections can be compared with the results of previous quasiclassical trajectory calculations and reaction dynamics experimental on the abstraction channel. In addition, the calculated rate constants are in the reasonably good agreement with experimental measurement.
Dynamic multi-object Gaussian process models: A framework for data-driven functional modelling of human joints
Creators: name: Fouefack, Jean-Rassaire
name: Borotikar, Bhushan
name: Douglas, Tania S.
name: Burdin, Valérie
name: Mutsvangwa, Tinashe E. M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Statistical shape models (SSMs) are state-of-the-art medical image analysis tools for extracting and explaining features across a set of biological structures. However, a principled and robust way to combine shape and pose features has been illusive due to three main issues: 1) Non-homogeneity of the data (data with linear and non-linear natural variation across features), 2) non-optimal representation of the $3D$ motion (rigid transformation representations that are not proportional to the kinetic energy that move an object from one position to the other), and 3) artificial discretization of the models. In this paper, we propose a new framework for dynamic multi-object statistical modelling framework for the analysis of human joints in a continuous domain. Specifically, we propose to normalise shape and dynamic spatial features in the same linearized statistical space permitting the use of linear statistics; we adopt an optimal 3D motion representation for more accurate rigid transformation comparisons; and we provide a 3D shape and pose prediction protocol using a Markov chain Monte Carlo sampling-based fitting. The framework affords an efficient generative dynamic multi-object modelling platform for biological joints. We validate the framework using a controlled synthetic data. Finally, the framework is applied to an analysis of the human shoulder joint to compare its performance with standard SSM approaches in prediction of shape while adding the advantage of determining relative pose between bones in a complex. Excellent validity is observed and the shoulder joint shape-pose prediction results suggest that the novel framework may have utility for a range of medical image analysis applications. Furthermore, the framework is generic and can be extended to n$>$2 objects, making it suitable for clinical and diagnostic methods for the management of joint disorders.
description: 15 pages, 14 figures
Building data capacity internationally through repository management training and collaboration
Creators: name: Alter, George
name: Woolfrey, Lynn
name: Annim, Samuel Kobina
name: Willliam Block
Publisher: name: Zenodo
Year: 2015

description: Research organizations and universities across the globe show increasing desire to disseminate and archive research data, although they often lack the training and resources to begin. This session will present case studies in training and collaboration between archives (the Inter-university Consortium for Political and Social Research (ICPSR), the Cornell Institute for Social and Economic Research (CISER)) and African universities (the University of Cape Coast (Ghana), IFORD (Cameroon)). Experiences from the case studies point to the need to understand the country context and sequence of needs in relation to resources.
Data management on a shoestring budget
Creators: name: Perry, Carol
Publisher: name: Zenodo
Year: 2015

description: Providing data management services at a university with limited resources can be a daunting challenge. With a little ingenuity, a fairly comprehensive data service can be established scaled to the available resources. At the University of Guelph we have utilized resources and expertise available through the greater data community to build our service over a four year period. Now, as we await the Canadian Tri-Council [Granting] Agencies' new open access policy to be implemented, the service we have built will be put to the test in earnest as researchers prepare for new data management planning requirements. This presentation will review the processes and practices we established as we built our service from scratch. We will address the challenges and the successes encountered along the way and examine the challenges we face moving forward.
Indirect interactions of membrane-adsorbed cylinders
Creators: name: Weikl, Thomas R.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Subcellular Processes (q-bio.SC)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Biological and biomimetic membranes often contain aggregates of embedded or adsorbed macromolecules. In this article, the indirect interactions of cylindrical objects adhering to a planar membrane are considered theoretically. The adhesion of the cylinders causes a local perturbation of the equilibrium membrane shape, which leads to membrane-mediated interactions. For a planar membrane under lateral tension, the interaction is repulsive for a pair of cylinders adhering to the same side of the membrane, and attractive for cylinders adhering at opposite membrane sides. For a membrane in an external harmonic potential, the interaction of adsorbed cylinders is always attractive and increases if forces perpendicular to the membrane act on the cylinders.
description: 9 pages, 8 figures; typos corrected
Self-Sufficiency and International Trade Policy Strategies in the Malaysian Rice Sector: Approaches to Food Security Using Spatial Partial Equilibrium Analysis
Creators: name: Ali, Roslina Binti
name: Alvaro, Durand-Morat
name: Wailes, Eric J.
name: Luckstead, Jeff
name: Ali, Roslina Binti
name: Alvaro, Durand-Morat
name: Wailes, Eric J.
name: Luckstead, Jeff
Publisher: name: Unknown
Year: 2019
Subjects: subject: Agricultural and Food Policy
subject: International Relations/Trade
subject: self-sufficiency
subject: free trade
subject: rice
subject: Malaysia
subject: food security

description: While the status quo of the national rice economy remains ambiguous, the Malaysian rice policy stand and tendency is more likely to move to a self-sufficiency strategy. Despite this, Malaysia has made an extreme policy decision to pursue an autarky economy in its primary staple, i.e., rice, thus closing its borders from international markets. The existing body of evidence shows that self-sufficiency is not an efficient policy strategy to address food security concerns and to alleviate poverty. Thus, this study evaluates and analyzes the impact of two alternative approaches to achieve food security. In particular, these approaches are through pursuing rice self-sufficiency and through free trade in rice. The results indicate that although Malaysia could achieve rice self-sufficiency, the net welfare impact on Malaysia would be negative and would be driven primarily by consumer welfare losses. This is because pursuing rice self-sufficiency may result in significantly higher rice prices, which would accordingly offset the gains acquired in producers’ welfare. On the other hand, free trade results in lower consumer prices and greater rice consumption. This would consequently increase consumers’ welfare and would yield a net welfare gain for Malaysia. However, this approach may deteriorate producer welfare due to higher import competition and lower producer prices.
Safeguarding Natura 2000 habitats from nitrogen deposition by tackling ammonia emissions from livestock facilities
Creators: name: De Pue, David
name: Buysse, Jeroen
name: De Pue, David
name: Buysse, Jeroen
Publisher: name: Unknown
Year: 2019
Subjects: subject: Agricultural and Food Policy
subject: Ammonia
subject: Livestock
subject: Nitrogen Deposition
subject: Habitats Directive
subject: Natura 2000

description: Nitrogen deposition is one of the main environmental threats to the conservation goals in areas protected by the European Habitats Directive, a problem that is quite pronounced in the livestock-rich region of Flanders, Belgium. Livestock farms are often located close to Natura 2000 areas. Therefore, ammonia emissions from livestock housing and manure storage have a high contribution to the deposition in these nearby protected habitats. In order to control this problem, the Flemish government imposes restrictions on livestock farms with a high impact on protected habitats. Using an integrated spatially-explicit modeling approach, we were able to show that the effectiveness of this spatially-differentiated policy is rather limited in terms of the percentage of habitats in exceedance of the critical load for nitrogen. In order to obtain a good status in all habitats, emission abatement efforts should extend beyond the livestock sector. Furthermore, the policy affects some livestock subsectors more than others, while similar discrepancies are unveiled on the level of different habitat types. By means of 4 different habitat classes, the effectiveness of different policy scenarios can be easily assessed on the level of individual habitats.
Precursor magneto-sonic solitons in a plasma from a moving charged object
Creators: name: Kumar, Atul
name: Sen, Abhijit
Publisher: name: arXiv
Year: 2019
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: The nature of fore-wake excitations created by a charged object moving in a magnetized plasma is investigated using particle-in-cell simulations. Our studies establish for the first time the existence of precursor magneto-sonic solitons traveling ahead of a moving charged object. The nature of these excitations and the conditions governing their existence are delineated. We also confirm earlier molecular dynamic and fluid simulation results related to electrostatic precursor solitons obtained in the absence of a magnetic field. The electromagnetic precursors could have interesting practical applications such as in the interpretation of observed nonlinear structures during the interaction of the solar wind with the earth and the moon and may also serve as useful tracking signatures of charged space debris traveling in the ionosphere.
The $p_T$-Spectra of Some Non-pion Secondaries in High Energy NN to NA/AA Collisions and the Combinational Approach
Creators: name: De, Bhaskar
name: Bhattacharyya, S.
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In continuation of our perusal of the studies on transverse momentum spectra for the main varieties of secondaries from a consistent and comprehensive phenomenological approach, we propose to take up here -- after a successful completion of reporting in detail the results (Ref.[4] in the text) on our analyses of the $p_T$-spectra of pions -- the studies specially on production of kaons, protons and antiprotons in several proton-induced and nucleus-involved collisions at high energies. The measured data on inclusive cross sections of kaons, protons and antiprotons from the various published sources have here been assorted first. Next, data on the $p_T$-spectra of the specific secondaries produced in PP and $P\bar{P}$ reactions have been scanned and analyzed with the help of Hagedorn's model(HM). Thereafter a connector, named here the combinational approach(CA), has been constructed and used to analyze the data on $p_T$-spectra of some major category of non-pion secondaries produced in nucleus-nucleus(AA/AB) collisions at high energies. And these exercises have, finally, led to the modestly successful interpretations of a wide band of data with the revelation of some insightful physical aspects of high energy interactions. The limitations of the approach have also been precisely pointed out in the end.
description: 25 pages, 18 figures; accepted for publication in IJMPA
Efficacy and safety of linagliptin added to metformin and sulphonylurea in Chinese patients with type 2 diabetes: a sub-analysis of data from a randomised clinical trial
Creators: name: Zhengpei Zeng
name: Jin-Kui Yang
name: Nanwei Tong
name: Shengli Yan
name: Xiling Zhang
name: Gong, Yan
name: Hans-Juergen Woerle
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biochemistry
subject: Space Science
subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Pharmacology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: Marine Biology
subject: Cancer
subject: 110309 Infectious Diseases
subject: FOS: Health sciences

description: To evaluate the efficacy and safety of linagliptin in Chinese patients with type 2 diabetes mellitus (T2DM) inadequately controlled by metformin and sulphonylurea. Data for a pre-defined Chinese subgroup who participated in a Phase III randomised, placebo-controlled, 24 week trial (NCT00602472) were analysed. The primary endpoint was change in HbA1c from baseline to 24 weeks. Apart from safety endpoints, secondary endpoints included changes in FPG and measures of insulin secretion and resistance. A total of 192 Chinese patients with T2DM participated in the pre-defined analysis; 144 and 48 patients received linagliptin or placebo, respectively, added to metformin and sulphonylurea. Baseline characteristics (mean [±SD]) for linagliptin and placebo were similar: HbA1c: 8.1% (±0.85) and 8.1% (±0.84); body mass index: 25.9 (±3.2) and 25.6 (±3.4) kg/m2, respectively. Placebo-corrected mean (±SE) change in HbA1c from baseline at 24 weeks was −0.68% (0.14) with linagliptin-based treatment (95% CI: −0.96 to −0.39; P P = 0.0044). Overall adverse event (AE) rates with linagliptin and placebo including background medication were similar (38.9% and 43.8%, respectively). Drug-related AEs were reported by 12.5% and 2.1% of linagliptin and placebo patients, respectively. Differences were due to hypoglycaemia (10.4% and 0.0%, respectively). No severe hypoglycaemia was reported in either group of this sub-population. Linagliptin in combination with metformin and sulphonylurea has a favourable safety profile and is an efficacious and well tolerated treatment option for Chinese patients with inadequately controlled T2DM. Reduction of sulphonylurea dose should be considered to minimise risk of hypoglycaemia. Although the findings of this pre-specified sub-analysis may be limited by the number of patients in the subgroup, the results were generally consistent with those for the overall population. ClinicalTrials.gov identifier: NCT00602472.
Data cleaning principles
Creators: name: Broman, Karl
Publisher: name: Zenodo
Year: 2021
Subjects: data cleaning, data science

description: Slides from Karl Broman's talk on Data Cleaning Principles from csv,conf,v6 on 4 May 2021. Source at github.
description: Ugh; on slide 16, HOMA_IR = glucose * insulin not glucose / insulin. 🙈 😳 This undermines a main point of the slide, that checking calculations helps to check your understanding.