37,761 research outputs found
New Deal to New Frontier: From security to opportunity in the American welfare state
This paper considers U.S. social policy in the years 1935-1960 through the prism of recurring disagreements over the appropriate balance between social security and individual freedom. The disagreements were sharpest in the 1930s, when the Social Security bill was drafted and revised, and resumed in intensity after World War II, with the introduction of President Truman's health insurance proposal. The disagreements diminished during the 1950s, as Republicans came to accept Social Security. When John Kennedy became president, during the first crisis in public confidence over the Aid to Dependent Children title of the Social Security Act, discussions about balancing security and freedom had lost currency. The paper argues that this loss of currency was unfortunate. The Roosevelt administration's approach to balancing goals of social security and individual freedom was a reasonable gamble, even when applied to single women and their children, and might have served Kennedy and subsequent presidents well.
Recent developments in chiral gauge theories: Approach of infinitely many fermi fields
I present the recent developments in a specific sub-field of chiral gauge
theories on the lattice. This sub-field pertains to the use of infinitely many
fermi fields to describe a single chiral field. In this approach, both
anomalous and anomaly free theories can be discussed in equal footing. It
produces the correct anomaly in the continuum limit. It has the potential to
describe fermion number violating processes in the presence of a gauge field
background with non-trivial topological charge on a finite lattice.Comment: 6 TeX pages: 6; Latex file, needs espcrc2.sty which is attache
Virasoro Conformal Blocks and Thermality from Classical Background Fields
We show that in 2d CFTs at large central charge, the coupling of the stress
tensor to heavy operators can be re-absorbed by placing the CFT in a
non-trivial background metric. This leads to a more precise computation of the
Virasoro conformal blocks between heavy and light operators, which are shown to
be equivalent to global conformal blocks evaluated in the new background. We
also generalize to the case where the operators carry U(1) charges. The refined
Virasoro blocks can be used as the seed for a new Virasoro block recursion
relation expanded in the heavy-light limit. We comment on the implications of
our results for the universality of black hole thermality in , or
equivalently, the eigenstate thermalization hypothesis for at large
central charge.Comment: 27+7 pages, 3 figures; typos corrected, citations adde
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