Precise Determination of Proton Spin-Precession Angles in the K600 Spectrometer and Beamline

This research was sponsored by the National Science Foundation Grant NSF PHY-931478

A Calibration of the K600 FPP from 120 to 200 MeV

This research was sponsored by the National Science Foundation Grant NSF PHY-931478

A Complete Set of In-plane Spin-transfer Coefficients for Small Angle pp Elastic Scattering at 200 MeV

This research was sponsored by the National Science Foundation Grant NSF PHY-931478

Measurement of the Remaining In-Plane Polarization Transfer Coefficients for the 10-B(p,p') 10-B Reaction at 200 MeV

This research was sponsored by the National Science Foundation Grant NSF PHY-931478

A Coincidence Measurement of D_NN' for p+p Elastic Scattering at T_p = 200 MeV

This research was sponsored by the National Science Foundation Grant NSF PHY-931478

Earliest hominin cancer: 1.7-million-year- old osteosarcoma from Swartkrans Cave, South Africa

The reported incidence of neoplasia in the extinct human lineage is rare, with only a few confirmed cases of Middle or Later Pleistocene dates reported. It has generally been assumed that premodern incidence of neoplastic disease of any kind is rare and limited to benign conditions, but new fossil evidence suggests otherwise. We here present the earliest identifiable case of malignant neoplastic disease from an early human ancestor dated to 1.8–1.6 million years old. The diagnosis has been made possible only by advances in 3D imaging methods as diagnostic aids. We present a case report based on re-analysis of a hominin metatarsal specimen (SK 7923) from the cave site of Swartkrans in the Cradle of Humankind, South Africa. The expression of malignant osteosarcoma in the Swartkrans specimen indicates that whilst the upsurge in malignancy incidence is correlated with modern lifestyles, there is no reason to suspect that primary bone tumours would have been any less frequent in ancient specimens. Such tumours are not related to lifestyle and often occur in younger individuals. As such, malignancy has a considerable antiquity in the fossil record, as evidenced by this specimen.NCS201

A Measurement of the Spin Transfer Observable D_NN' for p+p Elastic Scattering at T_p = 200MeV

This research was sponsored by the National Science Fooundation Grant NSF PHY-931478

The Strange Quark Contribution to the Proton's Magnetic Moment

We report a new determination of the strange quark contribution to the proton's magnetic form factor at a four-momentum transfer Q2 = 0.1 (GeV/c)^2 from parity-violating e-p elastic scattering. The result uses a revised analysis of data from the SAMPLE experiment which was carried out at the MIT-Bates Laboratory. The data are combined with a calculation of the proton's axial form factor GAe to determine the strange form factor GMs(Q2=0.1)=0.37 +- 0.20 +- 0.26 +- 0.07. The extrapolation of GMs to its Q2=0 limit and comparison with calculations is also discussed.Comment: 6 pages, 1 figure, submitted to Phys. Lett.

Medium Effects in the Normal Component Polarization Observables for the 13-C(p,p')13-C, (1/2)- → (9/2)+ Reaction at 200 MeV

This research was sponsored by the National Science Foundation Grant NSF PHY-931478