DISCUSSION OF FINANCING STATE AND LOCAL GOVERNMENT SERVICES IN A CYCLICAL ECONOMY

Public Economics,

THE EXPLOITATION OF COAL AS AN ENGINE FOR GROWTH IN EASTERN KENTUCKY - AN INPUT-OUTPUT STUDY

Resource /Energy Economics and Policy,

MIGRATION AND RETURN MIGRATION: A NEW LOOK AT THE EASTERN KENTUCKY MIGRATION STREAM

Labor and Human Capital,

Migration and return migration: A new look at the Eastern Kentucky migration stream

Most studies of the economics of migration have implicitly assumed that migratory streams are homogeneous. However, migratory streams from one region to another consist of two distinct streams: a stream of first-time migrants and a stream of return migrants moving back to their area of origin. In fact, a substantial proportion of all U.S. migration is return migration, 14 percent from 1955 to 1960 [15,p. 3]. Moreover, in states with histories of substantial out-migration, an even greater proportion of in-migrants are returnees, 35 .4 percent between 1955 and 1960. Yet, economists have largely ignored return migration in their attempts to explain changes in the labor force. Studies of return migration may have several important implications. If first-time migrants and return migrants have different characteristics, then studies which distinguish the two streams may provide more reliable insights into the determinants of migration. Comparison of the characteristics of return migrants with migrants who remain may provide guidance for the design of programs to facilitate successful migration. Knowledge of the causes and characteristics of return migration may provide additional understanding of the effects of migration on the communities of origin and destination

Intracranial measurement of current densities induced by transcranial magnetic stimulation in the human brain

Transcranial magnetic stimulation (TMS) is a non-invasive technique that uses the principle of electromagnetic induction to generate currents in the brain via pulsed magnetic fields. The magnitude of such induced currents is unknown. In this study we measured the TMS induced current densities in a patient with implanted depth electrodes for epilepsy monitoring. A maximum current density of 12 microA/cm2 was recorded at a depth of 1 cm from scalp surface with the optimum stimulation orientation used in the experiment and an intensity of 7% of the maximal stimulator output. During TMS we recorded relative current variations under different stimulating coil orientations and at different points in the subject's brain. The results were in accordance with current theoretical models. The induced currents decayed with distance form the coil and varied with alterations in coil orientations. These results provide novel insight into the physical and neurophysiological processes of TMS

A study of the attitudes of Golden Age Club members towards their program, worker, and agency

Thesis (M.S.)--Boston Universit

Algebraic And Geometric Properties Of Big Mapping Class Groups

This thesis investigates mapping class groups of infinite-type surfaces, also called big mapping class groups, by studying their actions on certain graphs whose vertices are arcs and curves on the underlying surface. In particular, we show that the extended mapping class group of any surface with a finite, positive number of punctures is isomorphic to the relative arc graph of that surface; that the mapping class group of any translatable surface is quasi-isometric to that surface\u27s translatable curve graph; and that the mapping class group of a sphere minus a Cantor set is quasi-isometric to that surface\u27s loop graph