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Calcium channels caught in peripheral glia’s tug-of-war on axon regeneration in Drosophila

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Neural Regeneration Research 2025年第2期20卷 475-476页

作者： jackson Powell Tobias Steinschaden Rose Horowitz Yuanquan Song Raymond G.Perelman Center for Cellular and Molecular Therapeutics The Children’s Hospital of PhiladelphiaPhiladelphiaPAUSA The Neuroscience Graduate Group University of PennsylvaniaPhiladelphiaPAUSA Department of Pathology and Laboratory Medicine University of PennsylvaniaPhiladelphiaPAUSA Medical University of Vienna Center for Brain ResearchDepartment of NeuroimmunologyViennaAustria

Neural damage or degeneration is at the crux of many diseases,and treatment of these diseases will require the development of therapeutics to enhance and guide neural *** intrinsic and extrinsic factors dictate a neuron’s ability to regenerate,and the combination of these factors results in the great regenerative capacity of the peripheral nervous system(PNS)and the poor regenerative capacity of the central nervous system(CNS)following *** the core of a neuron’s function is its ability to relay electrochemical signals,and a neuron’s excitability is a key factor in its ability to *** works have focused on the changes in neuronal electrophysiological properties,firing patterns,and ion flux after injury,which differentially activate signaling pathways at the core of *** role of glia in neuron regeneration has long been studied.

关键词： degeneration firing system

Piling up multidecker pyrgos[n]cages as antibacterial materials

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Science China Materials 2025年第01期 314-316页

作者： Miguel A.Liuzzi-Vaamonde jackson B.Lancaster Samantha A.Mason Yuanning Feng Department of Chemistry and Biochemistry The University of Oklahoma

The development of antibiotics is regarded as one of the most significant scientific advances in modern medicine. Before the commercialization of antibiotics, infectious diseases were catastrophic throughout history [1]. Penicillin was used to treat serious infections in the 1940s, but unfortunately, with the introduction of antibiotics came the emergence of antibiotic resistance [2,3]. Evolved and adapted methicillin-resistant Staphylococcus aureus (MRSA) strains are presently impacting community and healthcare systems across the globe [4].

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Concept of a Pitot Tube Able to Detect Blockage by Ice, Volcanic Ash, Sand and Insects, and to Clear the Tube

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Photonic Sensors 2015年第4期5卷 298-303页

作者： David A. jackson School of Physical Sciences Applied Optics Groups University of Kent UK

A conceptual coaxial Pitot tube （PT） has been developed using fiber optic sensors combined with actuators to monitor and maintain its correct operation under different environmental conditions. Experiments were performed showing that the dynamic and static tubes can be cleared of ice. It was also demonstrated that the dynamic tube could be cleared of dust and sand which was not the case for the static tube in the coaxial configuration. An approach was proposed to overcome this problem involving a conventional configuration where the static tube was operated independently orthogonal to the dynamic tube, and a second set of sensors and actuators was used. Sensors and associated actuators were developed for temperature and intensity for a linear PT. The aim of this work is to propose a solution for a problem that has caused the loss of the lives of many passengers and crew of aircraft. Resources were not available to test a full implementation of a PT incorporating the proposed modifications.

关键词： Pitot tube instrumentation FBG spectrometer pressure temperature optical intensity

Effect of distribution shape on the melting transition, local ordering,and dynamics in a model size-polydisperse two-dimensional fluid

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Chinese Physics B 2024年第7期33卷 419-428页

作者： jackson Pame Lenin SShagolsem Department of Physics National Institute of Technology ManipurImphalIndia

We study the effect of particle size polydispersity(δ) on the melting transition(T*), local ordering, solid–liquid coexistence phase and dynamics of two-dimensional Lennard–Jones fluids up to moderate polydispersity by means of computer simulations. The particle sizes are drawn at random from the Gaussian(G) and uniform(U) distribution *** these systems, we further consider two different kinds of particles, viz., particles having the same mass irrespective of size, and in the other case the mass of the particle scales with its size. It is observed that with increasing polydispersity,the value of T*initially increases due to improved packing efficiency(φ) followed by a decrease and terminates at δ ≈8%(U-system) and 14%(G-system) with no significant difference for both mass types. The interesting observation is that the particular value at which φ drops suddenly coincides with the peak of the heat capacity(CP) curve, indicating a transition. The quantification of local particle ordering through the hexatic order parameter(Q_6), Voronoi construction and pair correlation function reveals that the ordering decreases with increasing δ and T. Furthermore, the solid–liquid coexistence region for the G-system is shown to be comparatively wider in the T –δ plane phase diagram than that for the U system. Finally, the study of dynamics reveals that polydisperse systems relax faster compared to monodisperse systems;however, no significant qualitative differences, depending on the distribution type and mass polydispersity, are observed.

关键词： polydispersity ordering phase diagram dynamics

Nanostructured grinding wheels for ultra-precision engineering applications

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Nanotechnology and Precision Engineering 2021年第3期4卷 63-75页

作者： M.J.jackson Integrated Studies College of Technology and AviationKansas State UniversitySalinaKansas 67401USA

Manufacturers face challenges when dealing with abrasives that lose roundness,wear excessively,and suffer from pitting of the surface of the grinding wheel that needs rectification using dressing *** abrasive grits manufactured by hybrid fusion processes and by sintering/extrusion/printing processes are found to reduce pitting quite *** phenomenon of wheel collapse is increasing and cycle times developed during the grinding of aerospace alloys are much smaller compared to using conventional *** paper reviews the phenomenon of wheel collapse induced by pitting and takes a critical look at the production and analysis of hybrid fused and printed/sintered abrasives.A mathematical analysis is carried out of the diffusion of primary and secondary phases due to mechanical and ultrasonic agitation with the aim of producing abrasive grits with improved strength and *** developments in extruded,printed,and sintered grits for use in precision grinding applications are critically *** paper concludes by explaining how such abrasives are used in practice by industrial manufacturers of high-precision products.

关键词： Nanotechnology Abrasives Alloys Finishing Grinding Machining

Recent results from the HERMES experiment

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Chinese Physics C 2010年第9期34卷 1247-1253页

作者： H.E.jackson Physics Division Argonne National Laboratory

Results are presented from the Hermes experiment which uses semi-inclusive deep inelastic lepton scattering to study the flavor structure of the *** have been accumulated for pion and kaon double spin asymmetries,single-spin azimuthal asymmetries for meson electroproduction,deep virtual Compton scattering （DVCS）,and meson *** results provide information on the properties of the strange sea in the proton,constraints on transverse momentum dependent quark parton distributions,and demonstrate the promise of DVCS for isolating the total angular momentum carried by the quarks in the proton.

关键词： lepton-nucleon scattering spin asymmetries strange quarks parton distributions

Etiology matters:genetic and acquired prion diseases engage different mechanisms at a presymptomatic stage

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Neural Regeneration Research 2023年第12期18卷 2707-2708页

作者： Walker S.jackson Department of Biomedical and Clinical Sciences Wallenberg Center for Molecular MedicineLinköping UniversityLinköpingSweden

One of the most enigmatic problems in biomedical research surrounds the phenomenon that neurodegenerative diseases target specific cell types and brain *** is difficult to explain because the proteins that cause them are widely expressed,often highest in resistant *** mystery is further complicated by the fact that some disease-causing proteins are associated with multiple diseases.

关键词： diseases degenerative mechanisms

Boundary element method (BEM) applied to the rough surface contact vs. BEM in computational mechanics

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Friction 2019年第4期7卷 359-371页

作者： Yang XU Robert L.jackson Mechanical Engineering Department Auburn University

In the numerical study of rough surfaces in contact problem, the flexible body beneath the roughness is commonly assumed as a half-space or a half-plane. The surface displacement on the boundary, the displacement components and state of stress inside the half-space can be determined through the convolution of the traction and the corresponding influence function in a closed-form. The influence function is often represented by the Boussinesq-Cerruti solution and the Flamant solution for three-dimensional elasticity and plane strain/stress, respectively. In this study, we rigorously show that any numerical model using the above mentioned half-space solution is a special form of the boundary element method(BEM). The boundary integral equations(BIEs) in the BEM is simplified to the Flamant solution when the domain is strictly a half-plane for the plane strain/stress condition. Similarly, the BIE is degraded to the Boussinesq-Cerruti solution if the domain is strictly a half-space. Therefore, the numerical models utilizing these closed-form influence functions are the special BEM where the domain is a half-space(or a half-plane). This analytical work sheds some light on how to accurately simulate the non-half-space contact problem using the BEM.

关键词： boundary element method rough surface contact half-space half-plane Flamant solution Boussinesq-Cerruti solution

Referring to Third-Persons in English Interaction： A Single Case Analysis

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外国语 2018年第4期41卷 12-29页

作者： Clare jackson University of York UK

Talking about and referring to others is a fundamentally human activity that relies on the meaningful use of referring expressions for interlocuters to be able to identify the specific individual( s) being spoken of. With a primary focus on practices for referring to third parties,the broad aim of this paper is to show that whilst the selection of referring expression is based on complex,deeply social and cultural conventions,it is also a highly systematic and orderly activity. More specifically,this paper explores an interactional 'puzzle' contained in a single piece of data,in which a daughter — in conversation with her mother — refers to her father( her mother's ex-husband) in three different ways in quick succession. In doing so,we illustrate the potential interactional import of referring expressions for accomplishing social action beyond indexing an individual. In analysing this single case,one procedure for doing conversation analytic work is also illustrated. That is,in contrast to building and analysing collections,this paper draws on and applies what is already known from previous conversation analytic literature about practices for referring to persons. In analysing one fragment in which reference to a third party is made,we will review the fundamentals of the organisation of person reference in English.

关键词： conversation analysis person reference referring to third parties analysing single cases