A5071833266- Dark Matter and Cosmic Phenomena
- Astrophysics and Cosmic Phenomena
- Particle Detector Development and Performance
- Polymer Nanocomposites and Properties
- Atomic and Subatomic Physics Research
- Nuclear Physics and Applications
- Polymer Nanocomposite Synthesis and Irradiation
- Solar and Space Plasma Dynamics
- Environmental Sustainability and Education
- Tribology and Wear Analysis
- Race, Identity, and Education in Brazil
- Fatigue and fracture mechanics
- Cultural, Media, and Literary Studies
- Mechanical Engineering and Vibrations Research
- Quantum, superfluid, helium dynamics
- Engineering Applied Research
- Space Exploration and Technology
- Neutrino Physics Research
- Healthcare Quality and Management
- Science and Science Education
- Structural Health Monitoring Techniques
- Asphalt Pavement Performance Evaluation
- Health Systems, Economic Evaluations, Quality of Life
- Energetic Materials and Combustion
- Particle Accelerators and Free-Electron Lasers
Universidade Federal de Goiás
2020
Faculdades Guarulhos
2017
Istituto Nazionale di Fisica Nucleare, Sezione di Perugia
2007-2015
ASM Terni (Italy)
2014
Istituto Nazionale di Fisica Nucleare
2014
University of Perugia
2007-2013
A precision measurement by the Alpha Magnetic Spectrometer on International Space Station of positron fraction in primary cosmic rays energy range from 0.5 to 350 GeV based $6.8\ifmmode\times\else\texttimes\fi{}{10}^{6}$ and electron events is presented. The very accurate data show that steadily increasing 10 $\ensuremath{\sim}250\text{ }\text{ }\mathrm{GeV}$, but, 20 250 GeV, slope decreases an order magnitude. spectrum shows no fine structure, ratio observable anisotropy. Together, these...
A precise measurement of the proton flux in primary cosmic rays with rigidity (momentum/charge) from 1 GV to 1.8 TV is presented based on 300 million events. Knowledge dependence important understanding origin, acceleration, and propagation rays. We present detailed variation spectral index for first time. The progressively hardens at high rigidities.Received 6 March 2015DOI:https://doi.org/10.1103/PhysRevLett.114.171103This article available under terms Creative Commons Attribution 3.0...
Measurements of the positron fraction in high energy cosmic rays using space-borne Alpha Magnetic Spectrometer have been extended to energies 500 GeV. The new results show that stops increasing with at around 200
Precision measurements by the Alpha Magnetic Spectrometer on International Space Station of primary cosmic-ray electron flux in range 0.5 to 700 GeV and positron 500 are presented. The each require a description beyond single power-law spectrum. Both change their behavior at ∼30 but fluxes significantly different magnitude energy dependence. Between 20 200 spectral index is harder than index. determination differing indices versus new observation provides important information origins...
Knowledge of the precise rigidity dependence helium flux is important in understanding origin, acceleration, and propagation cosmic rays. A measurement primary rays with (momentum/charge) from 1.9 GV to 3 TV based on 50 million events presented compared proton flux. The detailed variation spectral index for first time. progressively hardens at rigidities larger than 100 GV. similar that though magnitudes are different. Remarkably, ratio increases up 45 then becomes constant; above well...
We present a measurement of the cosmic ray (e^{+}+e^{-}) flux in range 0.5 GeV to 1 TeV based on analysis 10.6 million events collected by AMS. The statistics and resolution AMS provide precision flux. is smooth reveals new distinct information. Above 30.2 GeV, can be described single power law with spectral index γ=-3.170±0.008(stat+syst)±0.008(energy scale).
Abstract In the present paper, a new approach to combine load conditions expressed by power spectral density functions and synthesize them into an equivalent one was presented. This method is based on concept of fatigue damage spectrum system dynamics. It developed design or verify operative durability tests (i.e., tracks), able test payloads transported vehicles, which could be alternative laboratory ones, defined norm. By analyzing acceleration norm measurements (all in terms functions)...
The Alpha Magnetic Spectrometer AMS-02 [1]-[4] is an astro particle physics experiment running on the International Space Station (ISS; see Figure 1) since May 19, 2011. Its missions include search for antimatter and identification of nature dark matter. AMS silicon tracker only subdetector inside permanent magnet that can detect charge a moving to distinguish anti-particle from (see Table 1 nomenclature).
In the present paper authors, starting from a previously proposed method for combination and synthesis of equivalent load conditions (by only managing PSD representations conditions), developed new approach based on concept Fatigue Damage Spectrum system dynamics. The was then validated by durability test case, in which two different acceleration motion conditions, norm condition using laboratory test) an operative one measurements acquired during experimental activity conducted transport...
Neste trabalho, discutimos as relações entre a ciência/ química, o surgimento e manutenção das sociedades como estas afetam química que ensinamos na escola: ahistórica descontextualizada. Admitimos negação invisibilidade de um passado em ciência tecnologia dos povos africanos da diáspora apresentamos uma proposta ensino descolonizada partir do reconhecimento hibridismo sociedade brasileira multirracial. Nossos resultados denunciam rigidez currículo, empobrecimento seu caráter conteudista...
In this paper we adopt a processing technology to develop elastomer plus nano-graphite hybrid composites with multifunctional properties. Beyond the improvements of mechanical properties, research findings demonstrate synergistic effect carbon black and graphite nanoplatelets prepare rubber composite thermally conductive design new class shock absorbers. It was found that critical GNPs/CB ratio apt reduce strong interlayer forces among GNPs sheets, which led efficiency on reinforcement in...
To provide a stable thermal environment for the AMS-Tracker, control system based on mechanically pumped CO2 two-phase loops was developed. It has been operating reliably in space since May 19, 2011. In this article, we summarize design, construction, tests, and performance of AMS-Tracker (AMS-TTCS).