Results 71 to 80 of about 62,680 (295)

From settler gardens to digital naturalists: human aesthetic preferences and land use changes facilitate the biogeographical expansion of a wild plant–virus interaction

PLANTS, PEOPLE, PLANET, EarlyView.
Anthropogenic facilitation of wild plants based on aesthetic preferences for particular traits can change the biogeography and ecology of natural communities. We use a mixed‐methods socioecological approach to characterize the ways in which humans interact with a common, widely distributed plant and a generalist viral symbiont that induces an ...
Elizabeth M. Lombardi, Jasmine S. Peters, Juan Pablo Jordán, Alison G. Power   +3 more
wiley   +1 more source

Aerodynamic Optimization and Thermal Deformation Effects on Mid-Altitude Sounding Rockets: A Computational and Structural Analysis

Dynamics
Mid-altitude sounding rockets are essential for atmospheric research and suborbital experimentation, where aerodynamic optimization and structural integrity are crucial for achieving targeted apogees.
Aslam Abdullah, Mohd Fadhli Zulkafli, Muhammad Akmal Abdul Halim, Ramanathan Ashwin Thanneermalai, Bambang Basuno   +4 more
doaj   +1 more source

Aerodynamic study of sounding rocket flows using Chimera and patched multiblock meshes [PDF]

Journal of Aerospace Technology and Management, 2011
Aerodynamic flow simulations over a typical sounding rocket are presented in this paper. The work is inserted in the effort of developing computational tools necessary to simulate aerodynamic flows over configurations of interest for Instituto de ...
João Alves de Oliveira Neto, Edson Basso, João Luiz F. Azevedo   +2 more
doaj  

Observations of Auroral-Zone Precipitating Electrons by the Antarctic Rockets (a. Precipitating Particles and Auroras) (Proceedings of the First Symposium on Coordinated Observations of the Ionosphere and the Magnetosphere in the Polar Regions (Part I))

Antarctic Record, 1979
During one year from January 1976, five sounding rockets carrying the electron detector were launched from Syowa Station, Antarctica. One of them was made on a geomagnetically quiet time, while the others all encountered a certain degree of auroral ...
Shoko OKUTANI, Masami WADA, Hajime TAKEUCHI, Masahiro KODAMA, Takashi IMAI   +4 more
doaj   +1 more source

Screening Surface Modifications to Benzene to Improve Solubility in Hydroxyl‐Terminated Polybutadiene (HTPB)—A DFT Demonstration

Propellants, Explosives, Pyrotechnics, EarlyView.
ABSTRACT The objective of this paper is to demonstrate the advantage of computationally pre‐screening surface‐modifying material candidates, using density functional theory (DFT), to inform experimental synthesis and formulation efforts. This demonstration focuses on improving the solubility of benzene‐based materials in hydroxyl‐terminated ...
Samantha E. Knoth
wiley   +1 more source

2017 Sounding Rockets Video

, 2017
The video shows activity within the Sounding Rockets Program, including a high level look at design work, fabrication, integration, testing, and launch ...
Bland, Berit H., Brodell, Charles L.
core  

GPS Tracking for Small Sounding Rockets [PDF]

, 1997
Active areas of research often create the need for improved technology to make observations in a way that has not previously been utilized. Such is the case with middle atmospheric research.
Fowers, Darin K.
core   +1 more source

Ozone Measurements in the Stratosphere from KSR420S-1 and -2 [PDF]

Journal of Astronomy and Space Sciences, 1994
The Korean sounding rockets(KSR420S-1, -2) equipped with ozone detectors have been launched at An-heung, Chungchungnam-do, on June 4 and September 1, 1993, respectively.
K. Y. Lee, D. H. Lee, J. Kim, C. J. Park, H. K. Cho   +4 more
doaj  

Direct Measurement of Explosive Impulse From Contact to the Ultra‐Near Field

Propellants, Explosives, Pyrotechnics, EarlyView.
ABSTRACT Measurement of impulse from explosive charges in contact and ultra‐near‐field regimes remains poorly characterised due to the short duration of loading, high strain rates, and the difficulty of obtaining direct momentum‐based measurements.
R. Alford, R. Hazael, R. Critchley, L. Humphreys   +3 more
wiley   +1 more source

SHEFEX - Hypersonic Re-entry Fllight Experiment - Vehicle and Subsystem Design, Flight Performance and Prospects [PDF]

, 2006
The purpose of the Sharp Edge Flight Experiment (SHEFEX) was to investigate the aerodynamic behavior and thermal problems of an unconventional shape for re-entry vehicles comprising multi-facetted surfaces with sharp edges.
Turner, Peter, Hörschgen, Marcus, Jung, Wolfgang, Stamminger, Andreas, Turner, John   +4 more
core