61,565 research outputs found
James E. Zimmerman
No full textJAMES E. ZIMMERMAN
NBS: 1970 1985
B: February 19, 1923, Lantry, South Dakota
D: August 4, 1999, Boulder, Colorado
EDUCATION:
South Dakota School of Mines and Technology, BS (electrical engineering), 1943
Carnegie Institute of Technology, PhD (Physics), 1951
PRINCIPAL FIELD:
Superconducting electronics and cryogenics
POSITIONS HELD AT NBS (BOULDER):
NBS Fellow (1983)
HONORS:
U.S. Department of Commerce Gold Medal, 1975
NBS Samuel Wesley Stratton Award, 1979
PUBLICATIONS:
Numerous technical papers; principal author (with A.H. Silver) of “Macroscopic Quantum Interference Effects through Superconducting Point Contacts," Phys. Rev., vol. 141, 367–375, 1966; principal author (with N.V. Frederick) of "Miniature Ultrasensitive Superconducting Magnetic Gradiometer and its Use in Cardiography and Other Applications," Appl. Phys. Lett., vol. 19, 16–19, 1971; "Sensitivity Enhancement of Superconducting Quantum Interference Devices Through the Use of Fractional Turn Loops," J. Appl. Phys., vol. 42, 4483– 4487, 1971
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Personal Papers (MS 80-0002)
No full textLetter from I. H. Kempner to Chauncey D. Leake referring to a previous conversation and correspondence about filling in the east and west flats in Galveston. He reports that the city engineer was only planning to fill the east flats from 6th Street to 2nd Street. He says he spoke with the city engineer and they are now preparing an estimate for filling the entire area from east to west and up to the city limits. The letter mentions a committee and its members, including Mrs. Zimmerman who prepared a preliminary report on the filling project
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Landsat-D: International Interests and Plans
No full textSince the launching of Landsat-1 in 1972, countries around the world have used Landsat data to assist in national resource development activities. More than 100 countries are now buying Landsat data products from distribution centers in the US and elsewhere. Six countries in addition to the US are operating ground stations to receive data from Landsat-2 and -3. Stations in three more countries are currently under construction; eight other states are planning similar facilities.
In late 1981 NASA plans to launch its fourth Landsat spacecraft, Landsat-D, which should provide expanded opportunities for users around the world to benefit from satellite remote sensing techniques. The Landsat-D Thematic Mapper, with its seven spectral channels and increased spatial resolution, offers considerable promise to scientists and resource managers, particularly in developing countries, where, for example, agricultural applications such as detection of diverse crops grown in small fields, have been limited by the current multispectral scanning abilities.
Mr. Zimmerman will discuss the current and growing interest in satellite remote sensing and prospects for further international cooperation in the Landsat-D era
Search for the rare decay D+ -> D(0)e(+)nu(e)
No full textKolcu, Onur Buğra (Arel Author)Using a data set with an integrated luminosity of 2.93 fb(-1) collected at root s = 3.773 GeV with the BESIII detector operating at the BEPCII storage rings, we search for the rare decay D+ -> D(0)e(+)nu(e). No signal events are observed. We set the upper limit on the branching fraction for D+ -> D(0)e(+)nu(e) to be 1.0 x 10(-4) at the 90% confidence level
Measurements of the absolute branching fractions for D-s(+) -> eta e(+)nu(e) and D-s(+) -> eta ' e(+)nu(e)
No full textBy analyzing 482 pb(-1) of e(+)e(-) collision data collected at root s = 4.009 GeV with the BESIII detector at the BEPCII collider, we measure the absolute branching fractions for the semileptonic decays D-s(+) -> eta e(+)nu(e) and D-s(+) -> eta ' e(+)nu(e) to be B(D-s(+) -> eta e(+)nu(e)) = (2.30 +/- 0.31 +/- 0.08)% and B(D-s(+) -> eta ' e(+)nu(e)) = (0.93 +/- 0.30 +/- 0.05)%, respectively, and their ratio B(D-s(+) -> eta ' e(+)nu(e)) / B(D-s(+) -> eta ' e(+)nu(e)) = 0.40 +/- 0.14 +/- 0.02, where the first uncertainties are statistical and the second ones are systematic. The results are in good agreement with previous measurements within uncertainties; they can be used to determine the eta-eta' mixing angle and improve upon the D-s(+) semileptonic branching ratio precision
"Closing the R&D Gap, Evaluating the Sources of R&D Spending"
No full textBoth spending and tax policies have been implemented in the United States with the goal of stimulating private sector research and development (R&D). Karier questions whether current R&D policy, especially the research and experimentation tax credit, can contribute to closing the gap between nondefense expenditures on R&D in the United States and such expenditures in other countries, such as Japan and Germany. He also explores possible changes to our current R&D policy to make it more effective.
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