A dynamical symmetry for supermembranes

A dynamical symmetry for supersymmetric extended objects is given.Comment: 3 page

Some Classical Solutions of Membrane Matrix Model Equations

Some exact solutions to the classical matrix model equations that arise in the context of M(embrane) theory are given, and their topological nature is identified

Qualitative Study of Prenatal Care and Low Income Women

This qualitative study explored the experience of low-income pregnant women in obtaining prenatal care. The literature review focused on the issues of accessibility and barriers in obtaining healthcare for low-income pregnant women. The review also included the concept of motivation for seeking and obtaining healthcare. Five pregnant women who sought prenatal care at an inner-city clinic were interviewed using semi-structured questions. The interviews focused on barriers to accessing health care and the women\u27 s motivations for seeking and continuing care throughout their pregnancies. The study found that barriers such as long wait times did exist, but the main problem for the women was their low-income status. Dealing with financial problems created stress in their lives, and the long wait times they experienced only added to their elevated stress levels. Fortunately, these problems did not impede their use of the clinic for their prenatal care. They continued to receive their care at the clinic in spite of the problems they experienced. The primary implication for social work practice is the need for practitioners to continue to work together with health care providers to develop programs and policies that eliminate barriers and promote healthcare within low-income communities

A Survey of Information Sources Used for Progress Decisions about Medical Students

Although many medical schools have adopted a variety of methods to assess student competency, the extent to which these innovations have changed how decisions about student progress are made is not clear. This paper describes a survey of 126 accredited allopathic U.S. medical schools to determine which information sources are used for decisions related to medical student progress and graduation. Respondents were asked to indicate up to three information sources used for seven specific decisions about student progress. The results indicate that multiple choice questions (MCQs) and faculty ratings remain the most frequently used information sources. Clinical skills education in the pre-clinical curriculum is the area with the broadest use of assessments for progress decisions. Several explanations are suggested for the primacy of MCQs and faculty ratings in student decisions, including familiarity for faculty and students, ease of implementation and the resources required for the adoption of other assessment strategies

Why Matrix theory works for oddly shaped membranes

We give a simple proof of why there is a Matrix theory approximation for a membrane shaped like an arbitrary Riemann surface. As corollaries, we show that noncompact membranes cannot be approximated by matrices and that the Poisson algebra on any compact phase space is U(infinity). The matrix approximation does not appear to work properly in theories such as IIB string theory or bosonic membrane theory where there is no conserved 3-form charge to which the membranes couple.Comment: 8 pages, 4 figures, revtex; references adde

Conceptual design of a 1-MW CW X-band transmitter for planetary radar

A proposed conceptual design to increase the output power of an existing X-band radar transmitter used for planetary radar exploration from 365 kW to 1 MW CW is presented. The basic transmitter system requirements as dictated by the specifications for the radar are covered. The characteristics and expected performance of the high-power klystrons are considered, and the transmitter power amplifier system is described. Also included is the design of all of the associated high-power microwave components, the feed system, and the phase-stable exciter. The expected performance of the beam supply, heat exchanger, and monitor and control devices is also presented. Finally, an assessment of the state-of-the-art technology needed to meet system requirements is given and possible areas of difficulty are summarized

Comments on the global constraints in light-cone string and membrane theories

In the light-cone closed string and toroidal membrane theories, we associate the global constraints with gauge symmetries. In the closed string case, we show that the physical states defined by the BRS charge satisfy the level-matching condition. In the toroidal membrane case, we show that the Faddeev-Popov ghost and anti-ghost corresponding to the global constraints are essentially free even if we adopt any gauge fixing condition for the local constraint. We discuss the quantum double-dimensional reduction of the wrapped supermembrane with the global constraints.Comment: 12 pages, typos corrected, to appear in JHE

Nahm's equations, N=1∗N=1^* domain walls, and D-strings in AdS5xS5AdS_5 x S_5

We consider the following two problems: classical domain walls in the $N=1^*$ mass deformation of the maximally supersymmetric Yang Mills theory, and D-strings as external magnetic sources in the context of the AdS/CFT correspondence. We show that they are both described by Nahm's equations with unconventional boundary conditions, and analyze the relevant moduli space of solutions. We argue that general `fuzzy sphere' configurations of D-strings in AdS$_5$ correspond to Wilson-'t Hooft lines in higher representations of the dual SU(n) gauge theory.Comment: Latex, 26 pages, 3 figures, uses JHEP.cls; v4: discussion of holographic interpretation of `fuzzy D-string' configurations modified. Minor esthetic changes otherwis

Experimental Verification of Surface Vehicle Dynamics

Experimental verification of surface vehicle dynamic