89,083 research outputs found
A study to determine if nurses in a general hospital on medical-surgical units are aware that there are opportunities to practice rehabilitation nursing in their daily nursing activities
Thesis (M.S.)--Boston Universit
Quadratic forms and systems of forms in many variables
Let be quadratic forms with integer coefficients in
variables. When and the variety is a smooth
complete intersection, we prove an asymptotic formula for the number of integer
points in an expanding box at which these forms simultaneously vanish, which in
particular implies the Hasse principle for . Previous work
in this direction required to grow at least quadratically with . We give
a similar result for forms of degree , conditional on an upper bound for
the number of solutions to an auxiliary inequality. In principle this result
may apply as soon as . In the case that , several strategies
are available to prove the necessary upper bound for the auxiliary inequality.
In a forthcoming paper we use these ideas to apply the circle method to
nonsingular systems of forms with real coefficients.Comment: 29 pages, in revie
Systems of cubic forms in many variables
We consider a system of cubic forms in variables, with integer
coefficients, which define a smooth complete intersection in projective space.
Provided , we prove an asymptotic formula for the number of integer
points in an expanding box at which these forms simultaneously vanish. In
particular we can handle systems of forms in variables, previous work
having required that . One conjectures that should be
sufficient. We reduce the problem to an upper bound for the number of solutions
to a certain auxiliary inequality. To prove this bound we adapt a method of
Davenport.Comment: 23 pages, submitte
Relationship between the atomic pair distribution function and small angle scattering: implications for modeling of nanoparticles
Here we show explicitly the relationship between the functions used in the
atomic pair distribution function (PDF) method and those commonly used in small
angle scattering (SAS) analyses. The origin of the sloping baseline, , in PDFs of bulk materials is identified as originating from the SAS
intensity that is neglected in PDF measurements. The non-linear baseline in
nanoparticles has the same origin, and contains information about the shape and
size of the nanoparticles.Comment: 19 pages, 0 figure
Critical Lieb-Thirring bounds in gaps and the generalized Nevai conjecture for finite gap Jacobi matrices
We prove bounds of the form â_(eâIâĎ_d(H)) dist(e, Ď_e(H)^(1/2) ⤠L^1 -norm of a perturbation, where I is a gap. Included are gaps in continuum one-dimensional periodic SchrĂśdinger operators and finite gap Jacobi matrices, where we get a generalized Nevai conjecture about an L^(1)-condition implying a SzegĹ condition. One key is a general new form of the Birman-Schwinger bound in gaps
Shifting the Burden of HIV/AIDS
As the economic burden of HIV/AIDS increases in sub-Saharan Africa, the allocation of the burden among levels and sectors of societies is changing. The private sector has greater scope than government, households, or NGOs to avoid the economic burden of AIDS, and a systematic shifting of the burden away from the private sector is underway. Common practices that shift the AIDS burden from businesses to households and government include pre-employment screening, reduced employee benefits, restructured employment contracts, outsourcing of less skilled jobs, selective retrenchments, and changes in production technologies. In South Africa, more than two thirds of large employers have reduced health care benefits or required larger contributions by employees. Most firms have replaced defined benefit retirement funds, which expose the firm to large annual costs but provide long-term support for families, with defined contribution funds, which eliminate firm risk but provide little to families of younger workers who die of AIDS. Contracting out of previously permanent jobs also shields firms from costs while leaving households and government to care for affected workers and their families. Many of these changes are responses to globalization and would have occurred in the absence of AIDS, but they are devastating for employees with HIV/AIDS. This paper argues that the shifting of the economic burden of AIDS is a predictable response by business to which a thoughtful public policy response is needed. Countries should make explicit decisions about each sectorâs responsibilities if a socially desirable allocation is to be achieved
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