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New Structures in the J/ψJ/ψ Mass Spectrum in Proton-Proton Collisions at √s = 13 TeV
No full textSupplemental Material: The auxiliary material includes the J/ J/ invariant mass spectrum for the full range of the fit, as well as a direct comparison with the results from LHCb by using their two principal models is available online at: https://journals.aps.org/prl/supplemental/10.1103/PhysRevLett.132.111901/BPH-21-003_supp-jnl.pdf .The accepted manuscript is available at OSTI, https://www.osti.gov/biblio/1988522. OSTI ID: 1988522
Report Number(s): CMS-BPH-21-003; CERN-EP-2023-109; FERMILAB-PUB-23-315-CMS; arXiv:2306.07164; oai:inspirehep.net:2668013A search is reported for near-threshold structures in the Formula Presented invariant mass spectrum produced in proton-proton collisions at √s = 13 TeV from data collected by the CMS experiment, corresponding to an integrated luminosity of 135 fb−1. Three structures are found, and a model with quantum interference among these structures provides a good description of the data. A new structure is observed with a local significance above 5 standard deviations at a mass of 6638 +43−38(stat)+16−31(syst) MeV. Another structure with even higher significance is found at a mass of 6847 +44−28(stat)+48−20(syst) MeV,, which is consistent with the X (6900) resonance reported by the LHCb experiment and confirmed by the ATLAS experiment. Evidence for another new structure, with a local significance of 4.7 standard deviations, is found at a mass of 7134
+48−25(stat)+41−15(syst) MeV.. Results are also reported for a model without interference, which does not fit the data as well and shows mass shifts up to 150 MeV relative to the model with interference.SCOAP3
Applying Graph Partitioning-Based Seeding Strategies to Software Modularisation
Get PDFSoftware modularisation is a pivotal facet within software engineering, seeking to optimise the arrangement of software components based on their interrelationships. Despite extensive investigations in this domain, particularly concerning evolutionary computation, the research emphasis has transitioned towards solution design and convergence analysis rather than pioneering methodologies. The primary objective is to attain efficient solutions within a pragmatic timeframe. Recent research posits that initial positions in the search space wield minimal influence, given the prevalent trend of methods converging upon akin local optima. This paper delves into this phenomenon comprehensively, employing graph partitioning techniques on dependency graphs to generate initial clustering arrangement seeds. Our empirical discoveries challenge conventional insight, underscoring the pivotal role of seed selection in software modularisation to enhance overall outcomes
Impact of Short-Term Computerized Cognitive Training on Cognition in Older Adults With and Without Genetic Risk of Alzheimer's Disease: Outcomes From the START Randomized Controlled Trial
Get PDFThis paper represents independent research partly funded by the National Institute of Health Research (NIHR) Biomedical Research Centre at South London and Maudsley NHS Foundation Trust and King's College London and the National Institute for Health and Care Research Exeter Biomedical Research Centre. The views expressed are those of the authors and not necessarily those of the NIHR or the Department of Health and Social Care. The paper was also supported by the NIHR Collaboration for Leadership in Applied Health Research and Care South-West Peninsula. The funders did not have any input into the design of the study, interpretation of results, writing of the manuscript, or decision to publish. No funding has been provided by a pharmaceutical company or other agency to write this article. Authors have not been precluded from accessing data, and all authors accept responsibility for publication.Objectives:
To establish the impact of a 3-minute computerized cognitive training program (START) on cognition in older adults with and without genetic risk of Alzheimer's disease.
Design:
Two-arm randomized controlled trial of the START program.
Setting and Participants:
Remote online trial in adults older than 50 taking part from home.
Methods:
The trial compared the START program with placebo in 6544 people older than 50. Primary outcome was executive function measured through Trailmaking B, with other secondary cognitive measures. Genetic risk profile and ApoE4 status were determined by Illumina Array.
Results:
START conferred benefit to executive function, attention, memory, and a composite measure, including in people with the ApoE4 genotype.
Conclusions and Implications:
The 3-minute START task offers a means of supporting cognitive health in older adults and could be used at scale and within a precision medicine approach to reduce risk of cognitive decline in a targeted way.This work was funded in part through the MRC Proximity to Discovery: Industry Engagement Fund (External Collaboration, Innovation and Entrepreneurism: Translational Medicine in Exeter 2 (EXCITEME2) ref. MC_PC_17189) awarded to B.C
TTCF4LAMMPS: A toolkit for simulation of the non-equilibrium behaviour of molecular fluids at experimentally accessible shear rates
Get PDFProgram summary:
Program title: TTCF4LAMMPS
CPC Library link to program files: https://doi.org/10.17632/hh2rkcxbrf.1
Developer's repository link: https://github.com/edwardsmith999/TTCF4LAMMPS
Licensing provisions: GNU General Public License 3
Programming language: Python 3
Nature of problem: Measuring the nonequilibrium behaviour of bulk and confined fluids under experimentally accessible strain rates in non-equilibrium molecular dynamics (NEMD) simulations.
Solution method: Creating a Python-based code that utilises the transient-time correlation function method and the LAMMPS software to enable the bulk fluid properties (e.g. viscosity) and confined fluid interfacial properties (e.g. shear stress and slip velocity) to be computed at low shear rates with NEMD.Data availability:
All data used in this work are freely reproducible using the program provided. The source files are also available at the link https://github.com/edwardsmith999/TTCF4LAMMPS.We present TTCF4LAMMPS, a toolkit for performing non-equilibrium molecular dynamics (NEMD) simulations to study the fluid behaviour at low shear rates using the LAMMPS software. By combining direct NEMD simulations and the transient-time correlation function (TTCF) technique, we study the fluid response to shear rates spanning 15 orders of magnitude. We present two examples for simple monatomic systems: one consisting of a bulk liquid and another with a liquid layer confined between two solid walls. The small bulk system is suitable for testing on personal computers, while the larger confined system requires high-performance computing (HPC) resources. We demonstrate that the TTCF formalism can successfully detect the system response for arbitrarily weak external fields. We provide a brief mathematical explanation for this feature. Although we showcase the method for simple monatomic systems, TTCF can be readily extended to study more complex molecular fluids. Moreover, in addition to shear flows, the method can be extended to investigate elongational or mixed flows as well as thermal or electric fields. The high computational cost needed for the method is offset by the two following benefits: i) the cost is independent of the magnitude of the external field, and ii) the simulations can be made highly efficient on HPC architectures by exploiting the parallel design of the algorithm. We expect the toolkit to be useful for computational researchers striving to study the nonequilibrium behaviour of fluids under experimentally-accessible conditions.We thank the Australian Research Council for a grant obtained through the Discovery Projects Scheme (Grant No. DP200100422) and The Royal Society for support via International Exchanges, Grant No. IES/R3/170/233. J.P.E. was supported by the Royal Academy of Engineering (RAEng) through their Research Fellowships scheme. D.D. was supported through a Shell/RAEng Research Chair in Complex Engineering Interfaces. The authors acknowledge the Swinburne OzSTAR Supercomputing facility and the Imperial College London Research Computing Service (DOI:https://doi.org/10.14469/hpc/2232) for providing computational resources for this work. We thank Debra Bernhardt and Stephen Sanderson (University of Queensland) for useful discussions regarding the implementation of SLLOD in LAMMPS
Spectroscopic and Microscopic Characterization of Microbial Biofouling on Aircraft Fuel Tanks
Get PDFFull text also available at: Europe PMC - https://europepmc.org/article/MED/38319653Avoiding microbial contamination and biofilm formation on the surfaces of aircraft fuel tanks is a major challenge in the aviation industry. The inevitable presence of water in fuel systems and nutrients provided by the fuel makes an ideal environment for bacteria, fungi, and yeast to grow. Understanding how microbes grow on different fuel tank materials is the first step to control biofilm formation in aviation fuel systems. In this study, biofilms of Pseudomonas putida, a model Gram-negative bacterium previously found in aircraft fuel tanks, were characterized on aluminum 7075-T6 surfaces, which is an alloy used by the aviation industry due to favorable properties including high strength and fatigue resistance. Scanning electron microscopy (SEM) coupled with energy-dispersive X-ray (EDX) showed that extracellular polymeric substances (EPS) produced by P. putida were important components of biofilms with a likely role in biofilm stability and adhesion to the surfaces. EDX analysis showed that the proportion of phosphorus with respect to nitrogen is higher in the EPS than in the bacterial cells. Additionally, different morphologies in biofilm formation were observed in the fuel phase compared to the water phase. Micro-Fourier transform infrared spectroscopy (micro-FTIR) analysis suggested that phosphoryl and carboxyl functional groups are fundamental for the irreversible attachment between the EPS of bacteria and the aluminum surface, by the formation of hydrogen bonds and inner-sphere complexes between the macromolecules and the aluminum surface. Based on the hypothesis that nucleic acids (particularly DNA) are an important component of EPS in P. putida biofilms, the impact of degrading extracellular DNA was tested. Treatment with the enzyme DNase I affected both water and fuel phase biofilms─with the cell structure disrupted in the aqueous phase, but cells remained attached to the aluminum coupons.InnovateUK and Airbus Operations Ltd., within the project “Fuel Architecture and Systems Technology (FAST)”, Project reference 113161 (TS/R008132/1). A.D.M. acknowledges funding from the UK Engineering and Physical Sciences Research Council (EPSRC) DTP scholarship (project reference: 2748843
Study of charm hadronization with prompt baryons in proton-proton and lead-lead collisions at = 5.02 TeV
No full textA preprint version of the article is available at arXiv:2307.11186v2 [nucl-ex], https://arxiv.org/abs/2307.11186v2 Comments: Replaced with the published version. Added the journal reference and the DOI. All the figures and tables can be found at https://cms-results.web.cern.ch/cms-results/public-results/publications/HIN-21-004 (CMS Public Pages). Report number: CMS-HIN-21-004, CERN-EP-2023-085.The production of prompt Λ+c baryons is measured via the exclusive decay channel Λ+c → pK−π+ at a center-of-mass energy per nucleon pair of 5.02 TeV, using proton-proton (pp) and lead-lead (PbPb) collision data collected by the CMS experiment at the CERN LHC. The pp and PbPb data were obtained in 2017 and 2018 with integrated luminosities of 252 and 0.607 nb−1, respectively. The measurements are performed within the Λ+c rapidity interval |y| 10 GeV/c are strongly suppressed in PbPb collisions. The level of suppression depends significantly on the collision centrality. The Λ+c / D0 production ratio is similar in PbPb and pp collisions at pT > 10 GeV/c, suggesting that the coalescence process does not play a dominant role in prompt Λ+c baryon production at higher pT.SCOAP3
Ultra-Wideband High-Efficiency Dual-Polarized Conformal Phase Array for Wireless Power Transfer
Get PDFIn this letter, a novel methodology to remove the common-mode resonance of tightly coupled arrays using two-set unit cell and conformal operation is presented, whereby the ultra-wideband dual-polarized conformal phase array is developed with high efficiency for wireless power transfer applications. Initially, a design method to shift the common-mode resonance of a tightly coupled array outside of the operating band using two-set unit cell and conformal operation is described, and a dual-polarized two-set unit cell of infinite array is proposed with ultra-wideband operation. Subsequently, the 8 × 8 dual-polarized two-set unit cells are designed to conform a cylindrical surface with a radius of 200 mm (1.3λ), resulting in a cylindrical-conformal tightly coupled array. Ultimately, an experimental prototype of the obtained conformal array was manufactured and measured. It achieves an operated bandwidth of 2.2∼12.4 GHz (5.6:1) with active VSWRs 70% for dual-polarized operation. The good correspondence between the measured results and the simulated results illustrates the feasibility of the presented conformal array. Such a balanced high-performance conformal phase array provides a perfect solution for wireless power transfer systems of various maneuverable platforms.National Natural Science Foundation of China (Grant Number: 62201417);
111 Project of China
The impact of self-construal on consumers’ intention to write reviews: A trait activation perspective
Get PDFIdentifying which consumers are more likely to write reviews and when they are more likely to do so is of paramount importance for marketing management. Applying trait activation theory, this research explores how brand strength and consumption experience affect the intention of consumers with varying self-construals to write reviews. The findings suggest that, in general, consumers with an independent self-construal are less inclined to write reviews compared to those with an interdependent self-construal generally. However, for weak brands, consumers with an interdependent self-construal are less inclined to write reviews compared to those with an independent self-construal, irrespective of whether they have a positive or negative experience. When dealing with strong brands, consumers with an independent self-construal are more likely to generate reviews following a negative experience rather than a positive one. These findings improve our understanding of consumers’ review-writing behavior and offer insights for practitioners to enhance consumer review management.China Postdoctoral Science Foundation (Award Number: 2022M720835). Grant Recipient: Chunfeng Chen; National Natural Science Foundation of China (Award Number: 71972055). Grant Recipient: Depeng Zhang; National Natural Science Foundation of China (Award Number: 71672044). Grant Recipient: Depeng Zhang
Symbolic knowledge innovation through bricolage in the periphery: the Bauhaus movement
Get PDFData availability:
The data underlying this article are available in the article.JEL O31 - Innovation and Invention: Processes and IncentivesR11 - Regional Economic Activity: Growth, Development, Environmental Issues, and ChangesZ11 - Economics of the Arts and Literature.In this article, we examine how symbolic knowledge innovation—that is, the recombination of ideas on aesthetic value in new ways—emerges in the periphery. While symbolic knowledge innovation drives growth, its role in creating new paths in the periphery is largely under-investigated. New path creation has been largely envisaged through macro (e.g., policy) or meso (e.g., industrial R&D) aggregates, overlooking micro-level actors (e.g., individuals), and their agency in mobilizing heterogeneous resources vital for innovation. Viewed in this light, we investigate how the interaction of actors at different levels (macro, meso, and micro) shapes symbolic knowledge innovation in the periphery. We draw on the case of Bauhaus movement to investigate symbolic knowledge innovation in the peripheries of Weimar and Dessau. Our findings illustrate symbolic knowledge innovation at the Bauhaus in terms of three phases, namely, semiotic codes: Bauhaus idea generation and articulation; material basis: development of Bauhaus artefacts; and material basis: Bauhaus commercial success. We further unpack actors’ agency and show how each phase of symbolic knowledge innovation emerges through bricolage. We contribute to the economic geography literature by showing the role of bricolage and actors’ agency in symbolic knowledge innovation for new path creation in the periphery
Flight Stream Effects on Installed Jet Noise with Wing-Flap and Fuselage
Get PDFReduction of jet noise through use of higher bypass ratios has significantly reduced isolated jet noise and installation effects generally, have become of higher relative importance. Two flight stream velocities for an installed jet engine including pylon and a wing with deployed flap, connected to a fuselage are contrasted. The successful framework developed previously is extended to this challenging configuration. Key flow and noise data are validated against measurements in a blind test. A significant decrease in turbulence kinetic energy levels below the wing and within the shear layer downstream of the flap is found with associated decrease in noise. The authors believe the framework is general enough for inclusion of landing gear and tail-plane.The authors would like to thank the EPSRC for the computational time made available on the UK supercomputing facility ARCHER/ARCHER2 via the UK Turbulence Consortium (EP/R029326/1). This work was conducted within the Innovate UK ACAPELLA project (reference 113086) with supporting SYMPHONY project (reference 100539) data, in collaboration with Rolls-Royce plc
Data sources:
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