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Fast radio Bursts as Crustal Dynamical Events Induced by Magnetic Field Evolution in Young Magnetars

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research in Astronomy and Astrophysics 2022年第3期22卷 39-46页

作者： j.E.Horvath P.H.r.s.Moraes M.G.B.de Avellar L.s.rocha Universidade de são Paulo(UsP) Instituto de AstronomiaGeofísica e Ciências AtmosféricasRua do Matão 1226Cidade Universitária05508-090 São PauloSPBrazil Universidade Federal de são Paulo(UNIFEsP) Instituto de Ciências AmbientaisQuímicas e FarmacêuticasRua São Nicolau 21009913-030 DiademaSPBrazil Universidade Federal do ABC(UFABC) Centro de Ciências Naturais e Humanas(CCNH)Avenida dos Estados 500109210-580Santo AndréSPBrazil

We revisit in this work a model for repeating Fast radio Bursts based of the release of energy provoked by the magnetic field dynamics affecting a magnetar’s *** address the basics of such a model by solving the propagation of the perturbation approximately,and quantify the energetics and the radiation by bunches of charges in the so-called charge starved region in the ***(almost)simultaneous emission of newly detected X-rays from sGr 1935+2154 is tentatively associated with a reconnection behind the *** strength of f-mode gravitational radiation excited by the event is quantified,and more detailed studies of the nonlinear(spiky)soliton solutions are suggested.

关键词： stars:magnetars relativistic processes radiation mechanisms:non-thermal

Emerging role of A-kinase anchoring protein 5 signaling in reward circuit function

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Neural regeneration research 2025年第10期20卷 2913-2914页

作者： William j.Flerlage Mark L.Dell’Acqua Brian M.Cox Fereshteh s.Nugent Uniformed services University of the Health sciences Department of Pharmacology and Molecular TherapeuticsBethesdaMDUSA Department of Pharmacology University of Colorado School of MedicineAnschutz Medical CampusAuroraCOUSA

There is a strong evidence supporting the hypothesis of synaptic dysfunction as a major contributor to neural circuit and network disruption underlying emotional and mood dysregulation in psychiatric disorders(simmons et al.,2024).Diverse sets of distinct molecular signaling pathways converge on the synapse to regulate synaptogenesis,synaptic function,and synaptic plasticity in brain regions and circuits through complex interactions organized by numerous multivalent protein scaffolds,including the family of proteins known as A-kinase anchoring proteins(AKAPs).

关键词： function supporting

A Long-range Generalized Predictive Control Algorithm for a DFIG Based Wind Energy system

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IEEE/CAA journal of Automatica sinica 2019年第5期6卷 1209-1219页

作者： j.s.solis-Chaves Lucas L.rodrigues C.M.rocha-Osorio Alfeu j.sguarezi Filho the Department of Energy Engineering at the Federal University of ABC-UFABC Santo AndreSPBrazil

This paper presents a new Long-range generalized predictive controller in the synchronous reference frame for a wind energy system doubly-fed induction generator based. This controller uses the state space equations that consider the rotor current and voltage as state and control variables, to execute the predictive control action. Therefore, the model of the plant must be transformed into two discrete transference functions, by means of an auto-regressive moving average model, in order to attain a discrete and decoupled controller, which makes it possible to treat it as two independent single-input single-output systems instead of a magnetic coupled multiple-input multiple-output system. For achieving that, a direct power control strategy is used, based on the past and future rotor currents and voltages estimation. The algorithm evaluates the rotor current predictors for a defined prediction horizon and computes the new rotor voltages that must be injected to controlling the stator active and reactive powers. To evaluate the controller performance, some simulations were made using Matlab/simulink. Experimental tests were carried out with a small-scale prototype assuming normal operating conditions with constant and variable wind speed profiles. Finally, some conclusions respect to the dynamic performance of this new controller are summarized.

关键词： Direct power control doubly-fed induction generator flux oriented control generalized predictive control long-range predictive control wind energy systems

redback/Black Widow systems as progenitors of the highest neutron star masses and low-mass Black Holes

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science China(Physics,Mechanics & Astronomy) 2020年第12期63卷 115-116页

作者： j.E.Horvath A.Bernardo L.s.rocha r.Valentim P.H.r.s.Moraes M.G.B.de Avellar Universidade de sao Paulo Department of Astronomy IAG-USP.R.do Matao 122605508-090Cidade UniversitariaSao Paulo SPBrazil Departamento de Física Instituto de Ciências AmbientaisQuímicas e Farmacêuticas(ICAQF)R.Sao Nicolau 21009913-030Diadema SPBrazil

The long-standing problem of the maximum mass that can be achieved by the compact objects,with clear implications for the equation of state of matter above the nuclear saturation density(see ref.[1]and references therein),is receiving a new twist with the latest data from binary systems and Ns-Ns merging *** ago,double neutron stars systems(DNs)data installed the idea of a"canonical"mass of^1.4 M_⊙,but later work provided evidence for heavier objects with increasing degree of confidence,and it became clear that at least a second"mass scale"had to be present[2].

关键词： mass canonical saturation

Dynamics of air transport networks：A review from a complex systems perspective

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Chinese journal of Aeronautics 2017年第2期30卷 469-478页

作者： Luis E.C.rocha Department of Public Health sciences Karolinska Institutet Stockholm 17177 Sweden Department of Mathematics University of Namur 5000 Belgium

Air transport systems are highly dynamic at temporal scales from minutes to *** dynamic behavior not only characterizes the evolution of the system but also affect the system＇s *** the evolutionary mechanisms is thus fundamental in order to better design optimal air transport networks that benefits companies,passengers and the *** this review,we briefly present and discuss the state-of-the-art on time-evolving air transport *** distinguish the structural analysis of sequences of network snapshots,ideal for long-term network evolution（*** evolution）,and temporal paths,preferred for short-term dynamics（*** evolution）.We emphasize that most previous research focused on the first modeling approach（***-term） whereas only a few studies look at high-resolution temporal *** conclude the review highlighting that much research remains to be done,both to apply already available methods and to develop new measures for temporal paths on air transport *** particular,we identify that the study of delays,network resilience and optimization of resources（aircraft and crew） are critical topics.

关键词： Air transport Airport network Complex network Dynamic network Temporal network

Deciphering the mechanobiology of microglia in traumatic brain injury with advanced microsystems

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Neural regeneration research 2025年第8期20卷 2304-2306页

作者： Anthony Procès sylvain Gabriele Univ.Grenoble Alpes InsermU1216Grenoble Institut des NeurosciencesGrenobleFrance Mechanobiology&Biomaterials Group CIRMAPResearch Institute for BiosciencesUniversity of MonsMonsBelgium

Advanced microsystems in traumatic brain injury research:Traumatic brain injury(TBI)results from a mechanical insult to the brain,leading to neuronal and axonal damage and subsequently causing a secondary *** minutes ... 详细信息

关键词： traumatic injury damage

Colloidal(Gd0.98Nd0.02)2O3 nanothermometers operating in a cell culture medium within the first and second biological windows

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journal of rare Earths 2020年第5期38卷 483-491页

作者： M.L.Debasu H.Oliveira j.rocha L.D.Carlos Department of Physics CICECO-Aveiro Institute of MaterilsUniversidade de Aveiro3810-193AveiroPortugal Department of Chemistry CICECO-Aveiro Institute of MaterialsUniversidade de Aveiro3810-193AveiroPortugal Department of Biology CESAMLaboratory of Biotechnology and CytomicsUniversidade de Aveiro3810-193AveiroPortugal

Non-contact,self-referenced and near-infrared luminescent nanothermometers have been recognized as emerging tools in the fields of nanomedicine and nanotechnology due to their great capability of precise temperature readout at the nanoscale and real-time deep-tissue ***,the development of multifunctional and biocompatible luminescent nanothermometers operating within the optically transparent biological windows with high thermal sensitivity(>2.0%/K)remains ***,we present(Gd0.98Nd0.02)2O3 nanothermometers operated effectively within the first and second biological windows upon continuous-wave laser diode excitation at 808 *** thermometric parameters are defined by the relative changes in the emission intensities originating from the two stark components of the 4 F3/2 level(r2 and r1)to the 4 I9/2(900-1000 nm),4 I11/2(1035-1155 nm)and 4 I13/2(1300-1450 nm)*** thermo metric parameters are evaluated for colloidal samples in a cell culture medium and powder samples,and the highest thermal sensitivity(2.18%/K at 298 K)is attained for the former in the first biological window(both the excitation and emission in the 800-965 nm range).The repeatability and temperature uncertainty are 99%and 1.2 K,*** nanothermometers are biocompatible with human MNT-1 melanoma and HaCaT cells for 24 h of exposure and nanoparticle concentration up to 0.400 mg/mL,showing their potential for applications in nanomedicine,e.g.,intracellular imaging and temperature mapping.

关键词： Gd2O3 Nd3^+-doped nanoparticles Luminescent nanothermometry Thermal sensitivity Cytotoxicity of nanoparticles rare earths

Optimal treatment of stratified Carreau and Casson nanofluids flows in Darcy-Forchheimer porous space over porous matrix

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Applied Mathematics and Mechanics(English Edition) 2020年第11期41卷 1651-1670页

作者： r.KUMAr r.KUMAr s.A.sHEHZAD A.j.CHAMKHA Department of Mathematics Central University of Himachal PradeshDharamshala 273001India Department of Mathematics COMSATS University IslamabadSahiwal 57000Pakistan Institute of research and Development Duy Tan UniversityDa Nang 550000Vietnam Institute of Theoretical and Applied research(ITAr) Duy Tan UniversityHanoi 100000Vietnam

A comparative three-dimensional(3D)analysis for Casson-nanofluid and Carreau-nanofluid flows due to a flat body in a magnetohydrodynamic(MHD)stratified environment is *** is estimated to be suspended in a Darcy-Forchheimer *** and Dufour responses are also accommodated in the flow field.A moving(rotating)coordinate system is exercised to examine the bidirectionally stretched flow fields(flow,heat transfer,and mass transfer).Nanofluid is compounded by taking ethylene glycol/sodium alginate as base fluid and ferric-oxide(Fe3O4)as *** equations are handled by the application of optimal homotopy asymptotic method(OHAM),where convergence parameters are optimized through the classical least square *** novel mechanism(hidden physics)due to appearing parameters is explored with the assistance of tabular and graphical *** reveal the double behavior state for temperature field with thermal stratification/Dufour number,and for concentration field with soret number due to the presence of turning points.

关键词： thermal-solutal stratification soret-Dufour effect Casson-Carreau nanofluid model porous matrix

Cross-focusing of two chirped Gaussian laser beams and THz wave generation in plasmas of multi-ion species under a weakly relativistic and ponderomotive regime

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Plasma science and Technology 2022年第10期24卷 1-11页

作者： M r jAFArI MILANI s rEZAEI M j jAFArI Photonics and Quantum Technologies research school Nuclear Science and Technology Research InstituteTehran 14665-678Iran Plasma and Fusion research school Nuclear Science and Technology Research InstituteTehran 14399-51113Iran

The generation of terahertz(THz)waves via the beating of two high-intensity chirped Gaussian lasers in a multi-ion-species plasma is numerically studied by taking into account the weak relativistic and ponderomotive regime of *** coupled differential equations for beamwidth parameters are extracted by introducing the dielectric function of such plasma and using WKB and paraxial ray *** amplitude of THz radiation at beat frequency resulting from the nonlinear current density induced by the beat ponderomotive force of the cross-focusing of beams was *** impacts of the chirp frequency parameter,initial laser intensity and initial ionic species density(specifically,the presence of singly and doubly charged ions)in the plasma on THz generation were *** numerical results reveal that THz radiation generation strongly depends on the chirp frequency parameter.A specific range of chirp frequencies exists for self-focusing as well as THz generation with a'turning point',where the THz emission reaches its maximum *** results show that the strength of self-focusing and consequently the generated THz radiation are reduced by increasing the density of doubly charged ionic species in the plasma due to the suppression of the nonlinear effects.

关键词： laser–plasma interaction THz generation chirped Gaussian laser beams