A new approach to seismic migration formalizes the classical diffraction (or common-tangent) stack by relating it to linearized seismic inversion and the generalized Radon transform. This approach recasts migration as the problem of reconstructing the earth’s acoustic scattering potential from its integrals over isochron surfaces. The theory rests on a solution of the wave equation with the geo...

Well–defined non–perturbative formulations of the physics of string theories, sometimes with D–branes present, were identified over a decade ago, from careful study of double scaled matrix models. Following recent work which recasts some of those early results in the context of type 0 string theory, a study is made of a much larger family of models, which are proposed as type 0A models of the e...

Telecommunications systems have evolved from the analog world to the digital world in two decades. This is particularly true for all categories of commercial satellite service: fixed, mobile, or broadcast. In the field of radiowave propagation modeling, however, the transition from the analog era to the digital era has been somewhat slower. Forcing the pace of propagation modeling has been the ...

Research endeavors to determine the effectiveness of patient decision aids (PtDAs) have yielded mixed results. The conflicting evaluations are largely due to the different metrics used to assess the validity of judgments made using PtDAs. The different approaches can be characterized by Hammond’s (1996) two frameworks for evaluating judgments: correspondence and coherence. This paper reviews th...

Health system financing is a critical factor in securing universal health care and achieving equity in access and payment. The human rights framework offers valuable guidance for designing a financing strategy that meets these goals. This article presents a rights-based approach to health care financing developed by the human right to health care movement in the United States. Grounded in a hum...

In 1955, in [2], Dieudonne, observing that each symplectic group Sp(V) is generated by its transvections, considered the problem of finding the minimal number of factors in the expression of elements 0 of Sp(V) as products of transvections in Sp(V).l The answer is in general residue cr, but with some classes of exceptions. Complications arise when the underlying field is 5, , and Dieudonne’s li...

Interior point methods, the traditional methods for the SDP , are fairly limited in the size of problems they can handle. This paper deals with an LP approach to overcome some of these shortcomings. We begin with a semi-infinite linear programming formulation of the SDP and discuss the issue of its discretization in some detail. We further show that a lemma due Pataki on the geometry of the SDP...

The Colombian peace accords of 2016 involved a formal commitment to between the Revolutionary Armed Forces Colombia-People's Army (FARC-EP in Spanish) and national government. Despite this advance, societal reconciliation sustainable remain key challenges. Through longitudinal qualitative design, we investigate encounter former guerrilla members urban university students community-based educati...

Abstract Process ontology is making deep inroads into the hard sciences. For it offers a workable understanding of dynamic phenomena which sits well with inquiries that problematize traditional conception self-standing, definite, independent objects as basic stuff universe. Process-based approaches are claimed by their advocates to yield better ontological descriptions various domains physical ...

The notion of materialism initially appears in the writings its Christian opponents late seventeenth-century England. Only eighteenth-century France is first posthumously claimed by a catholic priest, Meslier, and then authors such as La Mettrie d’Holbach, at risk persecution imprisonment: Diderot enjoys hospitality fortress Vincennes for rearranging materialist stance within his sensualist mul...