79,163 research outputs found
Structural and mechanical effects of interstitial sinks
Contribution of interstitial sinks to creep strength of niobium- and tantalum-based alloys determined by effect on activation energy for cree
Planetary submillimeter spectroscopy
The aim is to develop a comprehensive observational and analytical program to study solar system physics and meterology by measuring molecular lines in the millimeter and submillimeter spectra of planets and comets. A primary objective is to conduct observations with new JPL and Caltech submillimeter receivers at the Caltech Submillimeter Observatory (CSO) on Mauna Kea, Hawaii. A secondary objective is to continue to monitor the time variable planetary phenomena (e.g., Jupiter and Uranus) at centimeter wavelength using the NASA antennas of the Deep Space Network (DSN)
A psychoanalytic concept illustrated: Will, must, may, can — revisiting the survival function of primitive omnipotence
The author explores the linear thread connecting the theory of Freud and Klein, in terms of the central significance of the duality of the life and death instinct and the capacity of the ego to tolerate contact with internal and external reality. Theoretical questions raised by later authors, informed by clinical work with children who have suffered deprivation and trauma in infancy, are then considered. Theoretical ideas are illustrated with reference to observational material of a little boy who suffered deprivation and trauma in infancy. He was first observed in the middle of his first year of life while he was living in foster care, and then later at the age of two years and three months, when he had been living with his adoptive parents for more than a year
Distributed photovoltaic systems: Utility interface issues and their present status
Major technical issues involving the integration of distributed photovoltaics (PV) into electric utility systems are defined and their impacts are described quantitatively. An extensive literature search, interviews, and analysis yielded information about the work in progress and highlighted problem areas in which additional work and research are needed. The findings from the literature search were used to determine whether satisfactory solutions to the problems exist or whether satisfactory approaches to a solution are underway. It was discovered that very few standards, specifications, or guidelines currently exist that will aid industry in integrating PV into the utility system. Specific areas of concern identified are: (1) protection, (2) stability, (3) system unbalance, (4) voltage regulation and reactive power requirements, (5) harmonics, (6) utility operations, (7) safety, (8) metering, and (9) distribution system planning and design
The Effect of Cooling Rate on the Ductile- Brittle Bend-transition Temperature of Chromium Wire
Effect of cooling rate on ductile-brittle bend-transition temperature of chromium wir
Investigation of mechanical properties of chromium, chromium-rhenium, and derived alloys Twenty-third quarterly progress report, Oct. 1, 1965 - Mar. 31, 1966
Mechanical properties of chromium-rhenium alloy wire
Systematic study of high- hadron and photon production with the PHENIX experiment
The suppression of hadrons with large transverse momentum () in
central Au+Au collisions at = 200 GeV compared to a binary
scaled p+p reference is one of the major discoveries at RHIC. To understand the
nature of this suppression PHENIX has performed detailed studies of the energy
and system-size dependence of the suppression pattern, including the first RHIC
measurement near SPS energies. An additional source of information is provided
by direct photons. Since they escape the medium basically unaffected they can
provide a high baseline for hard-scattering processes.
An overview of hadron production at high in different colliding
systems and at energies from GeV will be
given. In addition, the latest direct photon measurements by the PHENIX
experiment shall be discussed.Comment: 6 pages, 3 figures, Proceeding for the Conference Strangeness in
Quark Matter, Levoca, Slovakia, June 24-29, 200
Power density measurements in the near field of the DSS 13 26-meter antenna
Power density measurements were made at Deep Space Station (DSS) 13 in the near field of the 26-m antenna to determine if radio frequency (rf) fields generated by the 20-kW transmitters could be responsible for the failure of three solid state rf amplifiers. These amplifiers are used in the Search for Extraterrestrial Intelligence (SETI) Radio Spectrum Surveillance System, which is currently located at the site. Measurements were made independently for one transmitter at 7150 MHz, and both transmitters together. Measurement results are tabulated and compared with predicted power densities under the measurement conditions. The results agree with the predictions within a factor of two. The predictions appear to give worst case values. Measurements indicated that amplifier failures are not attributable to the transmitter
Structural and mechanical effects of interstitial sinks Interim technical report, 8 Mar. 1968 - 8 Mar. 1969
Structural and mechanical effects of interstitial sinks in niobium and alloys of niobium and tantalu
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