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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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U.S. nuclear security policy uses radiation self-protection as a basis for reducing material attractiveness, but existing dose-rate criteria may not reflect the time scales of theft or sabotage. This report evaluates whether the commonly cited 1 Gy/h at 1 m criterion can plausibly cause adversary task failure during short-duration malicious acts.
This study, performed under the umbrella of the Task Force on Hemispheric Transport of Air Pollution (TF-HTAP), responds to the need of the global and regional atmospheric modelling community of having a mosaic emission inventory of air pollutants that conforms to specific requirements: global coverage, long time series, spatially distributed emissions with high time resolution, and a high sectoral resolution. The mosaic approach of integrating official regional emission inventories based on locally reported data, with a global inventory based on a globally consistent methodology, allows modellers to perform simulations of a high scientific quality while also ensuring that the results remain relevant to policymakers. HTAP_v3.2, an ad-hoc global mosaic of anthropogenic inventories, is an update to the HTAP_v3 global mosaic inventory and has been developed by integrating official inventories over specific areas (North America, Europe, Asia including China, Japan and Korea) with the independent Emissions Database for Global Atmospheric Research (EDGAR) inventory for the remaining world regions. The results are spatially and temporally distributed emissions of SO 2 , NO x , CO, NMVOC, NH 3 , PM 10 , PM 2.5 , Black Carbon (BC), and Organic Carbon (OC), with a spatial resolution of 0.1 × 0.1° and time intervals of months and years covering the period 2000–2020 (https://doi.org/10.5281/zenodo.17086684, Crippa, 2025, https://edgar.jrc.ec.europa.eu/dataset_htap_v32, last access: 27 October 2025). The emissions are further disaggregated to 16 anthropogenic emitting sectors. This paper describes the methodology applied to develop such an emission mosaic, reports on source allocation, differences among existing inventories, and best practices for the mosaic compilation. One of the key strengths of the HTAP_v3.2 emission mosaic is its temporal coverage, enabling the analysis of emission trends over the past two decades. The development of a global emission mosaic over such long time series represents a unique product for global air quality modelling and for better-informed policy making, reflecting the community effort expended by the TF-HTAP to disentangle the complexity of transboundary transport of air pollution.
Simple climate models play an integral role in the policy and scientific communities. They are used for climate mitigation scenarios within integrated assessment models, complex climate model emulation, and uncertainty analyses. Here we describe Hector v1.0, an open source, object-oriented, simple global climate carbon-cycle model. This model runs essentially instantaneously while still representing the most critical global-scale earth system processes. Hector has a three-part main carbon cycle: a one-pool atmosphere, land, and ocean. The model's terrestrial carbon cycle includes primary production and respiration fluxes, accommodating arbitrary geographic divisions into, e.g., ecological biomes or political units. Hector actively solves the inorganic carbon system in the surface ocean, directly calculating air–sea fluxes of carbon and ocean pH. Hector reproduces the global historical trends of atmospheric [CO 2 ], radiative forcing, and surface temperatures. The model simulates all four Representative Concentration Pathways (RCPs) with equivalent rates of change of key variables over time compared to current observations, MAGICC (a well-known simple climate model), and models from the 5th Coupled Model Intercomparison Project. Hector's flexibility, open-source nature, and modular design will facilitate a broad range of research in various areas.
A major product of the nightly processing of LSST images is a world-public stream of alerts from transient, variable, and moving sources. Science users will access these alerts through community brokers or through a simple filtering service provided by LSST. This document provides a guide to the plans and policies for the alert distribution system to aid science users, broker developers, funding agencies, and LSST Project personnel. It describes the components of the alert distribution system and the data rights required to access specific scientific products. It provides guidelines for organizations developing community brokers and describes the planned capabilities of the LSST simple alert filtering service and Science Platform to aid science users in planning for LSST science.
The startling developments in space science of the past few years which are already affecting the everyday conduct of our lives have introduced problems of new concepts and dimensions into the formulation and conduct of United States foreign affairs. We in the foreign policy field are now forced to speak matter-of-factly, and we hope confidently, of boosters, synchronous orbits, lunar landings, and meteorological satellites--terms which still seem slightly unusual in the diplomatic vocabulary. These developments have not only changed our vocabulary, however, they have forced upon us a whole new way of looking at the rest of the world and at the role which the United States must play in the international community.
Patent rights for communications satellites - nasa policy
Guidance policies for multiple-impulse correction of spacecraft trajectory
National space program policy and management interrelationships
Astronautics and aeronautics - chronology on science, technology, and policy for satellites, space probes, and manned space flights - 1964
Policies and scientific participation in NASA SPACE flight program
Evaluation of NASA patent policies
Monte Carlo simulation for adaptive policy for multiple impulse correction of trajectory of spacecraft
Scientific and technological research policy of France
Minimum average cost ordering policies for two product inventory systems with joint setup costs
Abstracts of policy studies in science and technology - George Washington University program
Mars planetary landing program schedule, COSPAR quarantine policy and biological losses from failures to collect data and from contamination