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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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At least 73 records · Page 4

All sources NASA NTRS DOE OSTI

DOE OSTI2021

Mean Heart Dose Is an Inadequate Surrogate for Left Anterior Descending Coronary Artery Dose and the Risk of Major Adverse Cardiac Events in Lung Cancer Radiation Therapy

Mean heart dose (MHD) over 10 Gy and left anterior descending (LAD) coronary artery volume (V) receiving 15 Gy (V15Gy) greater than 10% can significantly increase the risk of major adverse cardiac events (MACE) in patients with non-small cell lung cancer (NSCLC). We sought to characterize the discordance between MHD and LAD dose and the association of this classification on the risk of MACE after radiation therapy.

62 RADIOLOGY AND NUCLEAR MEDICINE↗

DOE OSTI2020

Chronic low dose irradiation alters hepatic transcriptional profiles, but not global DNA methylation in medaka (Oryzias latipes)

Not provided.

Environmental Sciences & Ecology↗

NASA NTRS1965

The secondary-particle contribution to the dose from monoenergetic proton beams and the validity of current-to-dose conversion factors

Secondary particle contribution to radiation dose from monoenergetic proton beams and validity of current-to-dose conversion factors

PROTON BEAM↗

NASA NTRS1996

Enhanced Damage in Bipolar Devices at Low Dose Rates: Effects at Very Low Dose Rates*

The effect of very low dose rates and equivalence of high-temperature irradiation are investigated for several device types that are sensitive to enhanced low dose-rate damage. New results are included at 0.001 rad(si)/s.

bipolar↗

NASA NTRS1962

COMPARISON OF PRIMARY PROTON DOSE WITH THE DOSE FROM GAMMA RAYS PRODUCED BY INELASTIC SCATTERING OF SOLAR FLARE PROTONS

Radiation dose from primary cosmic rays compared to dose from gamma rays produced by proton-proton reactions in solar flare - spacecraft shield

SOLAR PROTON↗

NASA NTRS1970

The absorbed dose and dose equivalent from negatively and positively charged pions in the energy range 10 to 2000 MeV

Absorbed dose and dose equivalent from negatively and positively charged pions in energy range 10 to 2000 MeV

Alsmiller, R. G., Jr.↗

NASA NTRS1980

A review of dose rate dependent effects of total ionizing dose /TID/ irradiations

The basic effects of ionizing radiation are summarized. The problem of the existence of a true dose rate effect is examined. Consideration is given to the nature of long term annealing, which is sometimes manifested as an 'apparent' dose rate effect. Both analytical and experimental work is considered and the results are related to practical testing requirements.

Nichols, D. K.↗

NASA NTRS1995

Calculation of dose, dose equivalent, and relative biological effectiveness for high charge and energy ion beams

The Green's function for the transport of ions of high charge and energy is utilized with a nuclear fragmentation database to evaluate dose, dose equivalent, and RBE for C3H10T1/2 cell survival and neo-plastic transformation as function of depth in soft tissue. Such evaluations are useful to estimates of biological risk for high altitude aircraft, space operations, accelerator operations, and biomedical application.

Wilson, J. W.↗

NASA NTRS1995

Calculation of Dose, Dose Equivalent, and Relative Biological Effectiveness for High Charge and Energy Ion Beams

The Green's function for the transport of ions of high charge and energy is utilized with a nuclear fragmentation database to evaluate dose, dose equivalent, and RBE for C3H1OT1/2 cell survival and neoplastic transformation as a function of depth in soft tissue. Such evaluations are useful to estimates of biological risk for high altitude aircraft, space operations, accelerator operations, and biomedical applications.

Wilson, J. W.↗

NASA NTRS1998

Evaluation of High Performance Converters Under Low Dose Rate Total Ionizing Dose (TID) Testing for NASA Programs

This paper reports the results of low dose rate (0.01-0.18 rads(Si)/sec) total ionizing dose (TID) tests performed on several types of high performance converters. The parts used in this evaluation represented devices such as a high speed flash converter, a 16-bit ADC and a voltage-to-frequency converter.

Sharma, Ashok K.↗

NASA NTRS2018

NASA Goddard Space Flight Center's Compendium of Recent Total Ionizing Dose and Displacement Damage Dose Results

Total ionizing dose and displacement damage dose testing were performed to characterize and determine the suitability of candidate electronics for NASA spacecraft and program use.

Electronics↗

NASA NTRS2019

NASA Goddard Space Flight Center's Compendium of Total Ionizing Dose, Displacement Damage Dose, and Single-Event Effects Test Results

Total ionizing dose, displacement damage dose, and single-event effect testing were performed to characterize and determine the suitability of candidate electronics for NASA space utilization. Devices tested include optoelectronics, digital, analog, bipolar devices, and FPGAs.

Displacement damage↗

NASA NTRS2019

NASA Goddard Space Flight Center's Compendium of Total Ionizing Dose, Displacement Damage Dose, and Single-Event Effects Test Results

Displacement damage↗

NASA NTRS2020

Investigation of Application-Specific Bias Conditions and Dose Rate Dependency in Total Ionizing Dose (TID) Response

This paper investigates flight circuit application bias and irradiation dose rate dependencies (“test as you fly” conditions) in the total ionizing dose (TID) response of various electronic components considered for use in a space radiation environment.

Zajac, Stephanie A.↗

DOE OSTI2023

CFD Simulation of the Dosing Behavior within the Atomic Layer Deposition Feeding System

The effective operation of atomic layer deposition (ALD) feeding system is the premise of realizing specific ALD processes. In the present work, a detailed computational fluid dynamics (CFD) model of the feeding system has been developed and validated, which accounts for the roles of ALD valves and manifolds. A numerical simulation of the compressible fluid flow and heat/mass transfer within the feeding system was conducted. The dosing amounts and the spatiotemporal distributions of the precursors can be accurately predicted using the CFD model, as validated by experimental results. Different precursors, operating conditions, and structures of the feeding system were simulated and analyzed to examine the operating flexibility of the feeding system. The simulation results can be adopted as the upstream boundary conditions for simulations of the ALD process in the reaction chamber. The substrate-scale simulation indicates that the effect of the feeding system on the film deposition is highly related to the surface kinetics of ALD. The present work can serve as a guide for the development and optimization of different ALD-based processes via proper operation and even the design of the feeding system.

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CH↗

NASA NTRS1968

Secondary-dose equivalent model and comparison of 160-MeV proton-induced neutron and proton dose with a comprehensive experiment

Secondary proton and neutron dose equivalent model calculations of random position, kinetic energy, and survival weight

Duneer, A. G., Jr.↗

NASA NTRS1970

The absorbed dose and dose equivalent from neutrons in the energy range 60 to 3000 MeV and protons in the energy range 400 to 3000 MeV

Absorbed dose equivalent from high energy neutrons and protons incident on tissue, using nucleon- meson cascade calculations

Alsmiller, R. G., Jr.↗

NASA NTRS2018

NASA Goddard Space Flight Center’s Compendium of Recent Total Ionizing Dose and Displacement Damage Dose Results

Total ionizing dose and displacement damage testing were performed to characterize and determine the suitability of candidate electronics for NASA space utilization. Devices tested include optoelectronics, digital, analog, linear bipolar devices, and hybrid devices.

Alyson D. Topper↗