rotational raman-based temperature measurements in a high-velocity turbulent jet

abstract: spontaneous rotational raman scattering spectroscopy is used to acquire the first ever high quality, spatially-resolved measurements of the mean and root mean square (rms) temperature fluctuations in turbulent, high-velocity heated jet

2017-07-20 12:02:59  

coronal jets

abstract: no abstract available

2017-07-20 11:53:28  

x-ray optics development at msfc

abstract: development of high resolution focusing telescopes has led to a tremendous leap in sensitivity, revolutionizing observational x-ray astronomy. high sensitivity and high spatial resolution x-ray observations have been possible due to us

2017-07-20 11:36:58  

environmental control system software & hardware development

abstract: ecs hardware: (1) provides controlled purge to sls rocket and orion spacecraft. (2) provide mission-focused engineering products and services. ecs software: (1) nasa requires compact unique identifiers (cuis); fixed-length identifier u

2017-07-20 11:24:28  

zero boil-off methods for large scale liquid hydrogen tanks using integrated refrigeration and storage

abstract: nasa has completed a series of tests at the kennedy space center to demonstrate the capability of using integrated refrigeration and storage (iras) to remove energy from a liquid hydrogen (lh2) tank and control the state of the propell

2017-07-20 11:15:58  

atmospheric research 2016 technical highlights

abstract: atmospheric research in the earth sciences division (610) consists of research and technology development programs dedicated to advancing knowledge and understanding of the atmosphere and its interaction with the climate of earth. the

2017-07-20 10:58:28  

measurement of linear coefficient of thermal expansion and temperature-dependent refractive index using interferometric system

abstract: a system combining an interferometer with an environmental chamber for measuring both coefficient of thermal expansion (cte) and temperature-dependent refractive index (dn/dt) simultaneously is presented. the operation and measurement

2017-07-20 10:56:58  

preliminary design of the continuous adrs for the primordial inflation explorer (pixie)

abstract: pixie is a recently proposed middle-class explorer mission designed to produce full-sky maps of polarization in the cosmic microwave background (cmb). pixies challenging science goals require not only measuring the extremely faint b-mo

2017-07-20 10:41:28  

piper continuous adiabatic demagnetization refrigerator

abstract: we report upon the development and testing of a 4-stage adiabatic demagnetization refrigerator (adr) capable of continuous cooling at 0.100 kelvin. this cooler is being built to cool the detector array aboard nasa's primordial inflatio

2017-07-20 10:13:28  

a ka-band (26 ghz) circularly polarized 2x2 microstrip patch sub-array with compact feed

abstract: a ka-band (26 gigahertz) 2 by 2 sub-array with square-shaped microstrip patch antenna elements having two truncated corners for circular polarization (cp) is presented. in addition, the layout for a new compact microstrip feed network

2017-07-20 10:11:58  

nasa era integrated cfd for wind tunnel testing of hybrid wing-body configuration

abstract: the nasa environmentally responsible aviation (era) project explored enabling technologies to reduce impact of aviation on the environment. one project research challenge area was the study of advanced airframe and engine integration c

2017-07-20 10:00:58  

robotically assembled aerospace structures: digital material assembly using a gantry-type assembler

abstract: this paper evaluates the development of automated assembly techniques for discrete lattice structures using a multi-axis gantry type cnc machine. these lattices are made of discrete components called "digital materials." we p

2017-07-20 09:56:58  

a method for rapid measurement of contrast sensitivity on mobile touch-screens

abstract: touch-screen displays in cell phones and tablet computers are now pervasive, making them an attractive option for vision testing outside of the laboratory or clinic. here we de- scribe a novel method in which subjects use a finger swip

2017-07-20 09:46:28  

lmi-based fuzzy optimal variance control of airfoil model subject to input constraints

abstract: this paper presents a study of fuzzy optimal variance control problem for dynamical systems subject to actuator amplitude and rate constraints. using takagi-sugeno fuzzy modeling and dynamic parallel distributed compensation technique,

2017-07-20 09:27:58  

multi-source sensor fusion for small unmanned aircraft systems using fuzzy logic

abstract: as the applications for using small unmanned aircraft systems (suas) beyond visual line of sight (bvlos) continue to grow in the coming years, it is imperative that intelligent sensor fusion techniques be explored. in bvlos scenarios t

2017-07-20 09:17:28  

three-dimensional modeling of aircraft high-lift components with vehicle sketch pad

abstract: vehicle sketch pad (openvsp) is a parametric geometry modeler that has been used extensively for conceptual design studies of aircraft, including studies using higher-order analysis. openvsp can model flap and slat surfaces using simpl

2017-07-20 06:20:58  

laser communications relay demonstration: introduction for experimenters

abstract: this document provides guidance to individuals or groups considering proposing an experiment for the laser communications relay demonstration (lcrd) experiment program. for the purposes of this document, the term experiment refers to b

2017-07-20 06:03:58  

searching the gamma-ray sky for counterparts to gravitational wave sources fermi gamma-ray burst monitor and large area telesc

abstract: we present the fermi gamma-ray burst monitor (gbm) and large area telescope (lat) observations of the ligo binary black hole merger event gw151226 and candidate lvt151012. at the time of the ligo triggers on lvt151012 and gw151226, gbm

2017-07-20 05:42:58  

overview of nasa electrified aircraft propulsion research for large subsonic transports

abstract: nasa is investing in electrified aircraft propulsion (eap) research as part of the portfolio to improve the fuel efficiency, emissions, and noise levels in commercial transport aircraft. turboelectric, partially turboelectric, and hybr

2017-07-20 05:36:28  

nasa's hubble space telescope: presentation to the freedom museum

abstract: the freedom museum, located in manassas, va, requested a speaker through the nasa speakers bureau, on the topic of the hubble space telescope. a public outreach presentation has been prepared. many of the facts are drawn from a public

2017-07-20 05:31:28  

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