What is the Relationship Between Altitude and Weight in a Model Rocket? [PDF]
This experiment was designed to find a function of payload weight for altitude. The same rocket was launched a repeated number of times with the same engine and varying amounts of weight.
Betz, Jonathan
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Air Support in the Breskens Pocket: The Case of the First Canadian Army and the 84 Group Royal Air Force [PDF]
, 2012 Operation “Switchback” was conceived to capture the Breskens pcoket and liberate the south bank of the Scheldt Estuary leading to Antwerp. As the Allies moved out of Normandy in the late summer of 1944, their primary supply line remained over the ...
Bechthold, Michael
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Nuclear Gamma ray Astronomy in the perspective of the INTEGRAL satellite
, 1999 We present a broad overview of the principal processes and astrophysical sites of gamma-ray line production and review the main pre-INTEGRAL satellite observations to set the stage to the next European era of gamma-ray line astronomy.Comment: 5 pages, 0 ...
Casse, Michel +2 more
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NASA Thesaurus Supplement: A three part cumulative supplement to the 1982 edition of the NASA Thesaurus (supplement 2) [PDF]
The three part cumulative NASA Thesaurus Supplement to the 1982 edition of the NASA Thesaurus includes: part 1, hierarchical listing; part 2, access vocabulary, and part 3, deletions. The semiannual supplement gives complete hierarchies for new terms and
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Commodity risk assessment of Populus alba, Populus nigra and Populus tremula plants from the UK
EFSA Journal, Volume 23, Issue 3, March 2025.Abstract The European Commission requested the EFSA Panel on Plant Health to prepare and deliver risk assessments for commodities listed in Commission Implementing Regulation (EU) 2018/2019 as ‘High risk plants, plant products and other objects’. This Scientific Opinion covers plant health risks posed by plants of Populus alba, Populus nigra and ...
EFSA Panel on Plant Health (PLH) +32 more
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Competition for pollen deposition space on pollinators generates last‐male advantage
Functional Ecology, Volume 39, Issue 2, Page 555-566, February 2025.Read the free Plain Language Summary for this article on the Journal blog. Abstract Many plants have precise pollen placement strategies, ensuring that large amounts of pollen are deposited on small and discrete areas of pollinators' bodies. This may lead to male–male competition if pre‐existing pollen (1) is smothered or displaced by pollen from ...
Pamela C. Santana +4 more
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Radiation and DNA Origami Nanotechnology: Probing Structural Integrity at the Nanoscale
ChemPhysChem, Volume 26, Issue 1, January 2, 2025.This review explores the impact of ionizing radiation on DNA origami nanostructures, highlighting mechanisms of radiation‐induced damage, structural changes, and implications for nanotechnology and medicine. It compares experimental methods for probing structural integrity and discusses how chemical environments influence radiation effects, offering ...
João Ameixa +3 more
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Comparison of Four Space Propulsion Methods for Reducing Transfer Times of Manned Mars Mission
, 2015 We assess the possibility of reducing the travel time of a manned mission to Mars by examining four different propulsion methods, and keeping the mass at departure under 2,500 tonnes, for a fixed architecture. We evaluated representative systems of three
Bertolami, O. +2 more
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Hydrogen Fire Detection System Features Sharp Discrimination [PDF]
, 1966 Hydrogen fire detection system discovers fires by detecting the flickering ultraviolet radiation emitted by the OH molecule, a short-lived intermediate combustion product found in hydrogen-air flames.
Bright, C. S.
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NASA Thesaurus Supplement: A three part cumulative supplement to the 1982 edition of the NASA Thesaurus (supplement 3) [PDF]
The three part cumulative NASA Thesaurus Supplement to the 1982 edition of the NASA Thesaurus includes Part 1, Hierarchical Listing, Part 2, Access Vocabulary, and Part 3, Deletions.
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