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Author : F. Leslie
Publisher :
ISBN 13 :
Total Pages : 40 pages
Book Rating : 4.:/5 (317 download)
Download or read book The Use of Ferrofluids to Model Materials Processing (MSFC Center Director's Discretionary Fund) written by F. Leslie and published by . This book was released on 2000 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : F. Leslie
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (841 download)
Download or read book The Use of Ferrofluids to Model Materials Processing (MSFC Center Director's Discretionary Fund Final Report, Project written by F. Leslie and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781721025541
Total Pages : 36 pages
Book Rating : 4.0/5 (255 download)
Download or read book The Use of Ferrofluids to Model Materials Processing (Msfc Center Director's Discretionary Fund) written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-11 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many crystals grown in space have structural flaws believed to result from convective motions during the growth phase. The character of these instabilities is not well understood but is associated with thermal and solutal density variations near the solidification interface in the presence of residual gravity and g-jitter. To study these instabilities in a separate, controlled space experiment, a concentration gradient would first have to be artificially established in a timely manner as an initial condition. This is generally difficult to accomplish in a microgravity environment because the momentum of the fluid injected into a test cell tends to swirl around and mix in the absence of a restoring force. The use of magnetic fields to control the motion and position of liquids has received recent, growing interest. The possibility of using the force exerted by a non-uniform magnetic field on a ferrofluid to not only achieve fluid manipulation but also to actively control fluid motion makes it an attractive candidate for space applications. This paper describes a technique for quickly establishing a linear or exponential fluid concentration gradient using a magnetic field in place of gravity to stabilize the deployment. Also discussed is a photometric technique for measuring the concentration profile using light attenuation. Although any range of concentrations can be realized, photometric constraints impose some limitations on measurements. Results of the ground-based experiments indicate that the species distribution is within 3 percent of the predicted value.Leslie, F. and Ramachandran, N.Marshall Space Flight CenterCRYSTAL GROWTH; FERROFLUIDS; GRAVITATION; LIQUIDS; MICROGRAVITY; SOLIDIFICATION; SPACEBORNE EXPERIMENTS; CONVECTION; DEFECTS; DEPLOYMENT; GRADIENTS; MOMENTUM; NONUNIFORM MAGNETIC FIELDS; PHOTOMETRY; TECHNOLOGY UTILIZATION; VIBRATION
Author :
Publisher :
ISBN 13 :
Total Pages : 78 pages
Book Rating : 4.:/5 (317 download)
Download or read book Scientific and Technical Reports, Articles, Papers, and Presentations written by and published by . This book was released on 2001 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 162 pages
Book Rating : 4.:/5 (317 download)
Download or read book Creating the Future: Research and Technology written by and published by . This book was released on 1998 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Robert Kraus Jr.
Publisher : Oxford University Press
ISBN 13 : 0199796513
Total Pages : 266 pages
Book Rating : 4.1/5 (997 download)
Download or read book Ultra-Low Field Nuclear Magnetic Resonance written by Robert Kraus Jr. and published by Oxford University Press. This book was released on 2014-02-26 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is designed to introduce the reader to the field of NMR/MRI at very low magnetic fields, from milli-Tesla to micro-Tesla, the ultra-low field (ULF) regime. The book is focused on applications to imaging the human brain, and hardware methods primarily based upon pre-polarization methods and SQUID-based detection. The goal of the text is to provide insight and tools for the reader to better understand what applications are best served by ULF NMR/MRI approaches. A discussion of the hardware challenges, such as shielding, operation of SQUID sensors in a dynamic field environment, and pulsed magnetic field generation are presented. One goal of the text is to provide the reader a framework of understanding the approaches to estimation and mitigation of low signal-to-noise and long imaging time, which are the main challenges. Special attention is paid to the combination of MEG and ULF MRI, and the benefits and challenges presented by trying to accomplish both with the same hardware. The book discusses the origin of unique relaxation contrast at ULF, and special considerations for image artifacts and how to correct them (i.e. concomitant gradients, ghost artifacts). A general discussion of MRI, with special consideration to the challenges of imaging at ULF and unique opportunities in pulse sequences, is presented. The book also presents an overview of some of the primary applications of ULF NMR/MRI being pursued.
Author : National Aeronautics & Space Administration
Publisher :
ISBN 13 : 9780160731792
Total Pages : 0 pages
Book Rating : 4.7/5 (317 download)
Download or read book Spinoff 2004 written by National Aeronautics & Space Administration and published by . This book was released on 2004-11 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : J. Chris Blades
Publisher : Cambridge University Press
ISBN 13 : 9780521345613
Total Pages : 362 pages
Book Rating : 4.3/5 (456 download)
Download or read book QSO Absorption Lines written by J. Chris Blades and published by Cambridge University Press. This book was released on 1988-08-18 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt: This second title in the series published for the Space Telescope Science Institute researches the current models of quasar absorption and the systems of absorption lines in the spectra of quasars. Experts in this field discuss the nature of the absorbing process in the vicinity of quasars, the "Lyman-alpha forest", metal-line systems, and quasars as probes of high redshift galaxies. The Hubble Space Telescope will be a valuable tool for learning more about the physics and astronomy of quasars.
Author : National Institute of Law Enforcement and Criminal Justice
Publisher :
ISBN 13 :
Total Pages : 16 pages
Book Rating : 4.3/5 ( download)
Download or read book The Technology Transfer Program written by National Institute of Law Enforcement and Criminal Justice and published by . This book was released on 1977 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
