Results 41 to 50 of about 45,927 (121)

EVALUATION OF AZIRIDINE BONDING AGENT BY MEANS OF CHEMICAL AND INSTRUMENTAL TECHNIQUES OF ANALYSIS. doi: 10.5028/jatm.2009.01015561

Journal of Aerospace Technology and Management, 2011
A new method using wet chemistry and instrumental analysis has been developed for evaluating the ring-opening of aziridine tris [1-(2 methyl) aziridinyl] phosphide oxide (MAPO) of the bonding agent used in composite propellant.
Darci Cortes Pires, Aparecida M. Kawamoto, Jairo Sciamareli, Elizabeth C. Matos, Milton F Diniz, Rita de Cássia L. Dutra, Koshun Iha   +6 more
doaj  

Shear Properties of Carbon Fiber/Phenolic Resin Composites Heat Treated at High Temperatures

Journal of Aerospace Technology and Management, 2016
Carbon fiber/phenolic resin composites have long been used as ablative materials in rocketry. Ablation is a complex multiscale problem where radiative and convective heating leads to the pyrolysis of phenolic resin matrix, resulting in the formation of a
Homero Paula Silva, Luiz Cláudio Pardini, Edison Bittencourt   +2 more
doaj   +1 more source

Determinação por FT-IR de transmissão e reflexão (UATR) de etileno e propileno em EPDM

Polímeros, 2014
Foi desenvolvida uma metodologia para a determinação dos teores de etileno (ET) e propileno (P) em amostras de borracha (elastômero puro, crua e vulcanizada), à base do copolímero de etileno-propileno-dieno monômero (EPDM), por espectroscopia no ...
Denis Damazio, Rita de Cássia Lazzarini Dutra, Milton Faria Diniz, Elizabeth da Costa Mattos   +3 more
doaj   +1 more source

Interannual Variability of Precipitation for the Centro de Lançamento de Alcântara in ENSO-Neutral Years

Journal of Aerospace Technology and Management, 2015
The interannual variability of precipitation in El Niño/Southern Oscillation-neutral years was studied for the Centro de Lançamento de Alcântara region. Monthly precipitation, sea surface temperature, wind at 925 hPa and outgoing longwave radiation data ...
Rosa de Fátima Cruz Marques, Marcos Daisuke Oyama   +1 more
doaj  

High-Altitude Platforms - Present Situation and Technology Trends

Journal of Aerospace Technology and Management, 2016
High-altitude platforms (HAPs) are aircraft, usually unmanned airships or airplanes positioned above 20 km, in the stratosphere, in order to compose a telecommunications network or perform remote sensing.
Flavio Araripe D'Oliveira, Francisco Cristovão Lourenço de Melo, Tessaleno Campos Devezas   +2 more
doaj   +1 more source

Development Status of the L75: A Brazilian Liquid Propellant Rocket Engine

Journal of Aerospace Technology and Management, 2014
This paper provides an overview of the design and development process of the L75 Liquid Propellant Rocket Engine (LPRE). Being developed at Institute of Aeronautics and Space (IAE), it is the first Brazilian open-cycle liquid rocket engine pressurized by
Daniel Soares de Almeida, Cristiane Maria de Moraes Pagliuco   +1 more
doaj  

Indoor Radar Cross Section Measurements of Simple Targets

Journal of Aerospace Technology and Management, 2012
This paper has described the radar absorbing materials characterization and radar cross section measurements, in the frequency range of 8 to 12 GHz, using a very simple setup.
Marcelo Alexandre Souza Miacci, Evandro Luiz Nohara, Inácio Malmonge Martin, Guilherme Gomes Peixoto, Mirabel Cerqueira Rezende   +4 more
doaj   +1 more source

Aplicação da calorimetria exploratória diferencial no estudo da cinética de transição alfa -> delta HMX [PDF]

Química Nova, 2004
Gilson da Silva, Elizabeth da Costa Mattos, Nanci Miyeko Nakamura, Koshun Iha   +3 more
doaj   +1 more source

The impact of interpolation in high-resolution spectroscopy

Astronomy & Astrophysics
Aims. We explore the impact that spectral interpolation introduces in radial velocity (RV) time-series that are extracted using templatebased methods, in particular systematic biases induced in this process. Methods.
Silva A. M., Doshi D., Al Moulla K., Cristo E. A. S., Artigau É., Viana P. T. P., Santos N. C., Martins J. H. C., Marques C. M. J., Sousa S. G., San Nicolas Martinez C., Campante T. L., Cabral A., Cristiani S.   +13 more
doaj   +1 more source

Avaliação por FT-IR de interações entre polímero energético e oxidante: GAP/ADN e GAP/AP

Polímeros, 2014
A possibilidade de interação entre o sistema à base do polímero de azoteto de glicidila e da dinitramida de amônio (GAP/ADN) foi avaliada, por FT-IR, nas regiões do infravermelho médio (MIR) e infravermelho próximo (NIR).
José Irineu Sampaio de Oliveira, Rita de Cássia Lazzarini Dutra, Jairo Sciamarelli, Milton Faria Diniz   +3 more
doaj   +1 more source