Radar And Visual Observations Of Autumnal (Southward) Shorebird Migration On Guam

Several species of shorebirds migrate between eastern Asia and the southern Pacific islands, Australia, and New Zealand. Observations made from Guam (13°25′N, 144°45′E) during autumn 1983 indicate that a significant number of birds take a direct route over the western Pacific Ocean. Radar observations and ground counts of migrants on Guam showed two periods of autumnal migratory activity. The first, largely adult birds, was in August and September. The second, largely juveniles, was in late September and October. Radar indicated that large numbers of birds passed over the island to the south with no evidence of compensation for drift by the easterly winds. Comparison of radar and ground observations on Guam showed that only a small subset of migrants stop on the island, suggesting that some species may make nonstop flights between eastern Asia and the South Pacific

NASTRAN buckling study of a linear induction motor reaction rail

NASTRAN was used to study problems associated with the installation of a linear induction motor reaction rail test track. Specific problems studied include determination of the critical axial compressive buckling stress and establishment of the lateral stiffness of the reaction rail under combined loads. NASTRAN results were compared with experimentally obtained values and satisfactory agreement was obtained. The reaction rail was found to buckle at an axial compressive stress of 11,400 pounds per square inch. The results of this investigation were used to select procedures for installation of the reaction rail

Holographic stress analysis

Device for nondestructive testing of soldered joints correlates stress with load to predict printed circuit board lifetime

Orbital tube flaring system produces tubing connectors with zero leakage

An orbital tube flaring system produces tubing connectors with a zero-leak potential needed in high pressure hydraulic and pneumatic systems. The flaring system incorporates a rolling cone and rolling die to closely control flare characteristics

[Review of] William H. Tucker. The Science and Politics of Racial Research

Since there is usually a two year period of time that elapses between the acceptance of a manuscript by a university press and its publication, we must commend William H. Tucker, who is an associate professor of psychology at Rutgers University, in his anticipation of contemporary controversies in reference to the relative abilities of races. Tucker argues that there is continuity in the thought of racists, which over the past two centuries include anthropometricians, eugenicists, and segregationists. ”The imprimatur of science,“ Tucker argues cogently, ”has been offered to justify, first slavery and, later, segregation, nativism, socio-political inequality, class subordination, poverty, and the general futility of social and economic reform. For Tucker, the attempt to demonstrate that one race is genetically less intelligent than others has been scientifically valueless and socially harmful. Scientific research into racial differences has, in essence, resulted in the “legitimation” of racist ideology. Nevertheless, Tucker is not pessimistic about winning the battle with racists. ”America\u27s democratic political traditions, he writes, ”have prevailed, and today universal suffrage, equal rights under law, and the guarantee of other civil liberties to all citizens are no longer up for debate; where demonstrable infringement has occurred, there is generally outrage and prompt redress