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Tracking of objects in video is of interest in such applications as surveillance and automated machine vision environments. We have developed an algorithm capable of tracking an object in video. A neural net is generated from the first frame of a video sequence to detect the object of a chosen color. The object is then detected in subsequent frames using net weights determined from the first frame. The object is tagged and tracked using bounding spatial filters in polar coordinates.

We describe preliminary investigations for an efficient and effective situational awareness architecture for the fusion of disparate sources of data. While technology for automated awareness is not yet available, the technology to develop displays to aid in fusing situation information already exists.

A complete measurement of the polarization transfer observables has been made for the first time in the (p, p') reaction at Intermediate energies. Measurements are reported for the 12 C(p, p1') 12 C reaction to the 1 + , T = 0(12.71 MeV) and l + , T = 1(15.11 MeV) states at 500 MeV at laboratory scattering angles of 3.5°, 5.5°, 7.5°, and 12.0°. Linear combinations of these observables are shown to exhibit a very selective dependence on the isoscalar and isovector spin-dependent components of the nucleon-nucleon interaction. To the extent of the validity of the single collision approximation, these amplitudes are compared directly to the free nucleon-nucleon amplitudes at small momentum transfers ( −1 ).

The elastic differential cross sections of 7.0-GeV/c /sup 4/He scattered from hydrogen (equivalent T/sub p/ = 1.05 GeV) has been measured over a range 0.17 < or = - t < or = 0.85(GeV/c)/sup 2/. The experiment has very low background (< or = 2%), adequate t resolution (< or = 5%), a good absolute normalization (15%), and a statistical accuracy in the interference region of about 3%. The data show a shallow first minimum and a shape very similar to the recent data from Centres d'Etudes Nucleaires de Saclay.

A 10-counter plastic scintillator hodoscope to measure pulse height, timing and position is described. The spatial, timing and pulse height resolutions were measured in a number of tests, and the mass resolution is discussed. The spatial resolution using the time-difference technique (0.7 cm fwhm for 100 MeV α-particles) is roughly a factor of 1.8 better than the resolution using the ratio-of-pulse-height method for these counters.

The absolute cross sections for the production of 11 C by 1.59 GeV and 4.19 GeV α-particles incident on natural carbon have been measured to be 46.4 ± 1.3 mb and 42.5 ± 1.1 mb respectively. These results, together with data reported at other energies, indicate that the C(α, X) 11 C cross section becomes approximately constant at a value of about 43 mb for energies above 3 GeV (750 MeV/n). A similar energy dependence is exhibited by the C(p, X) 11 C reaction whose cross section has been measured previously over an extensive energy range. The C(α, X) 11 C cross sections are found to be in good agreement with predictions of a semi-empirical model developed to describe nuclear fragmentation.

Single particle inclusive spectra and the associated multiplicity were obtained with a magnetic spectrometer and an azimuthal array of 30 Cerenkov counters from collisions of 1.8 GeV/nucleon 40 Ar on Be and Cu targets. No change is seen in the shape of the spectra obtained by the spectrometer for various multiplicity requirements.

A measurement of dsigma/dt between t = 0.18 and 2.2 (GeV/c)/sup 2/ has been made at a bombarding energy of 4.89 GeV. The shallow minimum observed between 0.4 and 2.68 GeV persists. The magnitude of dt/dt is intermediate between those measured at 2.68 GeV and at 23.1 GeV; dsigma/dt exhibits a change in slope near - t = 1.0 (GeV/c)/sup 2/, corresponding to the interference of double and triple scattering amplitudes.

Cross sections for the production of /sup 11/C in C targets were measured using /sup 12/C ions with energies of 0.40, 1.05, and 2.1 GeV/nucleon. These measurements were undertaken for the purpose of establishing primary standards for use as beam monitors. Annihilation radiation from /sup 11/C(T/sub 1/2/ = 20.34 min) was counted using a large volume NaI detector. Cross sections of 63.5 +- 0.5, 57.4 +- 0.4, and 60.9 +- 0.6 mb, respectively, were obtained for 0.40, 1.05, and 2.1 GeV/nucleon /sup 12/C beams. The results are compared with earlier measurements of the cross sections in C targets using relativistic proton and ..cap alpha.. beams. Good agreement is found between the cross sections measured in this work and a simple Glauber theory.

The first complete measurement of the polarization transfer observables in the (p,p') reaction at intermediate energies is reported. Data are presented for the reaction /sup 12/C(p,p') /sup 12/C to the 1/sup +/, T = 0 (12.71-MeV) and 1/sup +/, T = 1 (15.11-MeV) states at 500 MeV for laboratory scattering angles of 3.5/sup 0/, 5.5/sup 0/, 7.5/sup 0/, and 12.0/sup 0/. Linear combinations of these observables are shown to exhibit a very selective dependence on the isoscalar and isovector spin-dependent components of the nucleon interaction.

The observation of subthreshold production of K/sup -/ in the reaction /sup 28/Si+/sup 28/Si at 2.1 GeV/nucleon is reported. For production at O/sup 0/ and 1 GeV/c, a K/sup -/ cross section (d/sup 2/sigma/dp d..cap omega..) of 1.6 mb sr/sup -1/ (GeV/c)/sup -1/ and an upper limit for p-bar production of 3 nb sr/sup -1/ (GeV/c)/sup -1/ were measured. Calculations incorporating the effects of nuclear Fermi momentum underpredict the K/sup -/ yield by more than a factor of 20. Production mechanisms involving collective effects and equilibration are discussed.