Late Pleistocene human skull from Hofmeyr, South Africa, and modern human origins.

The lack of Late Pleistocene human fossils from sub-Saharan Africa has limited paleontological testing of competing models of recent human evolution. We have dated a skull from Hofmeyr, South Africa, to 36.2 +/- 3.3 thousand years ago through a combination of optically stimulated luminescence and uranium-series dating methods. The skull is morphologically modern overall but displays some archaic features. Its strongest morphometric affinities are with Upper Paleolithic (UP) Eurasians rather than recent, geographically proximate people. The Hofmeyr cranium is consistent with the hypothesis that UP Eurasians descended from a population that emigrated from sub-Saharan Africa in the Late Pleistocene.

Biomechanical analysis of a step-cut technique for flexor tendon repair.

We compared the strength of a new step-cut technique for flexor tendon repair with that of the widely used Kessler-Tajima technique, giving special attention to the relative contributions of the core and epitendinous sutures. 36 flexor digitorum profundus tendons from human cadavers were used. Corresponding digits from the same donor were paired, and the two tendons of each pair were placed in the Kessler-Tajima and step-cut groups, respectively. Each group had three subcategories of repair: (1) core repair alone; (2) epitendinous repair alone; and (3) full repair. In the Kessler-Tajima repair, the core stitch contributed more to ultimate tensile strength, while the epitendinous stitch contributed more to gap formation resistance. In the step-cut repair, however, the epitendinous stitch contributed more to both measures of strength. The full step-cut repair was 65% stronger in resisting gap formation and had 84% more ultimate tensile strength than the full Kessler-Tajima repair. We attribute the greater strength of the step-cut repair to the additional number of epitendinous loops, which lie perpendicular to the long axis of the tendon.

A federal/state partnership for health system reform.

In view of the continued lack of consensus regarding health system reform, a new approach is needed to the pluralism that characterizes the U.S. political scene. A two-step strategy can help to break the deadlock around health care financing and provision: a framework around which to shape federal/state responsibility for health care and a process to ensure that policy is translated into action. This strategy, called a federal/state compact for health, builds on actions already under way in several states and represents a process that is both incremental and comprehensive in nature. The federal government would take the lead regarding policy making, financing, and establishing benefits. The states would administer the program with flexibility similar to that existing in Canada's provinces.

The census undercount: effects on federal aid to cities.

The impact of adjusting 1980 U.S. population census figures for the undercount on federal grant allocations to cities is examined. In contrast to claims by local officials that their cities have lost up to 200 dollars per uncounted person in federal grants, the authors suggest that an undercount adjustment "could be expected to add little more than [20 dollars] per uncounted person in a few large cities--with most large cities experiencing much smaller gains or even federal aid losses after an adjustment." Several reasons for this finding are discussed. "They relate to the significant limitations of available techniques for estimating the census undercount; the fact that population data are not used in all formula allocation systems; the varied ways in which population data can affect formula allocation systems when they are used; and [the] assumption that federal aid funds would not increase in proportion to the population added as part of an undercount adjustment procedure for federal grants."