252,918 research outputs found
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
Locomotives 1707 and 2605, turntable siding, Lithgow 14.09.1948 [picture] /
No full textPart of collection: Buckland collection of railway transport photographs.; Title from inscription on reverse.; Also available in an electronic version via the Internet at: http://nla.gov.au/nla.pic-vn4542012
Locomotive 2413 hauling 5 car Australian Railway Historical Society special train crossing 3 car rail motor set (to Blacktown) at Mulgrave, 26 November 1960 [picture]
No full textPart of collection: Buckland collection of railway transport photographs.; Title from inscription on reverse.; Also available in an electronic version via the internet at: http://nla.gov.au/nla.pic-vn4542011
R. F. and D. C. F. McEwin
No full text"SX11030 R.F. McEwin 2'14 Aust Field Reg Served In Darwin July 1941 - Jan 1943 _____ SX11081 D.C.F. McEwin 2'14 Aust Field Reg Served In Darwin July 1941 - Jan 1943"SX11030 R. F. McEwin 2'14 Australian Field Regiment Served In Darwin July 1941 - January 1943 ____ SX11081 D. C. F. McEwin 2'14 Australian Field Regiment Served In Darwin July 1941 - January 1943
Field, C R, Public Works
No full textThis record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete. Visit this record in UMA's new catalogue at: https://archives.library.unimelb.edu.au/nodes/view/384983Surname: FIELD. Given Name(s) or Initials: C R. Military Service Number or Last Known Location: PUBLIC WORKS. Missing, Wounded and Prisoner of War Enquiry Card Index Number: 52632.230725
Item: [2016.0049.17276] "Field, C R, Public Works
"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.
Local dependence of ion temperature gradient on magnetic configuration, rotational shear and turbulent heat flux in MAST
No full textExperimental data from the Mega Amp Spherical Tokamak (MAST) is used to show that the inverse gradient scale length of the ion temperature R/L-Ti has its strongest local correlation with the rotational shear and the pitch angle of the magnetic field. Furthermore, R/L-Ti is found to be inversely correlated with the gyro-Bohm-normalized local turbulent heat flux estimated from the density fluctuation level measured using a 2D beam emission spectroscopy diagnostic. These results can be explained in terms of the conjecture that the turbulent system adjusts to keep R/L-Ti close to a certain critical value (marginal for the excitation of turbulence) determined by local equilibrium parameters (although not necessarily by linear stability)
Simulation of adiabatic thermal beams in a periodic solenoidal magnetic focusing field
No full textSelf-consistent particle-in-cell simulations are performed to verify earlier theoretical predictions of adiabatic thermal beams in a periodic solenoidal magnetic focusing field [ K. R. Samokhvalova, J. Zhou and C. Chen Phys. Plasmas 14 103102 (2007); J. Zhou, K. R. Samokhvalova and C. Chen Phys. Plasmas 15 023102 (2008)]. In particular, results are obtained for adiabatic thermal beams that do not rotate in the Larmor frame. For such beams, the theoretical predictions of the rms beam envelope, the conservations of the rms thermal emittances, the adiabatic equation of state, and the Debye length are verified in the simulations. Furthermore, the adiabatic thermal beam is found be stable in the parameter regime where the simulations are performed.United States. Dept. of Energy (Grant DEFG02- 95ER40919)United States. Dept. of Energy (Grant DE-FG02-05ER54836
Microwave surface resistance in BSCCO crystal: magnetic field and angular measurement.
No full textWe report on measurement of the microwave surface resistance R-s at 48 GHz on a BSCCO (2212 phase) crystal. We describe the procedure developed to perform measurements on crystals by the use of a resonant cavity with end-wall-replacement technique. The measurements are taken as a function of the temperature, magnetic field and angle theta between the field orientation and the (a,b) planes. The measured R-s is strongly anisotropic. The overall angular behavior reasonably follows the sin theta scaling rule, but deviation from this simple behavior appears approaching the parallel orientation. When the field is parallel to the (a,b) planes, a local maximum is observed in R-s, instead of a minimum. Finally, we show that the magnetic field dependence of R-s cannot be easily reconciled with existing theories for the motion of rigid flux lines
Scalp field maps and their characterization
No full textThe present chapter gives a comprehensive introduction into the display and quantitative characterization of scalp field data. After introducing the construction of scalp field maps, different interpolation methods, the effect of the recording reference and the computation of spatial derivatives are discussed. The arguments raised in this first part have important implications for resolving a potential ambiguity in the interpretation of differences of scalp field data.
In the second part of the chapter different approaches for comparing scalp field data are described. All of these comparisons can be interpreted in terms of differences of intracerebral sources either in strength, or in location and orientation in a nonambiguous way.
In the present chapter we only refer to scalp field potentials, but mapping also can be used to display other features, such as power or statistical values. However, the rules for comparing and interpreting scalp field potentials might not apply to such data.
Generic form of scalp field data
Electroencephalogram (EEG) and event-related potential (ERP) recordings consist of one value for each sample in time and for each electrode. The recorded EEG and ERP data thus represent a two-dimensional array, with one dimension corresponding to the variable “time” and the other dimension corresponding to the variable “space” or electrode. Table 2.1 shows ERP measurements over a brief time period. The ERP data (averaged over a group of healthy subjects) were recorded with 19 electrodes during a visual paradigm. The parietal midline Pz electrode has been used as the reference electrode
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