Duty to Warn and Protect

Professional counselors, spurred by the courts, have a dual ethical and legal responsibility to protect others from potentially dangerous clients, to protect clients from being harmed by others, and to protect clients from themselves. The delicate balance between confidentiality and the duty to warn and protect others must be handled on a case-by-case basis. The majority of individual state laws require counselors to breach confidentiality in order to warn and protect someone who is in danger. All states and U.S. jurisdictions now have mandatory reporting statutes for suspected physical, sexual, or emotional child abuse or neglect. There are also several states with mandatory reporting statutes for elder abuse or abuse of other persons presumed to have limited ability to care for themselves

The Status of Laser Diagnostics Supporting Ion Thruster Development at NASA GRC

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/76321/1/AIAA-2002-3960-677.pd

Low-current hollow cathode evaluation

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/76856/1/AIAA-1999-2575-648.pd

Rat Pancreatic Nucleoside Diphosphate Kinase, a Novel Regulator of Cholecystokinin Receptor Affinity

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/72322/1/j.1749-6632.1994.tb44089.x.pd

Developing an Inflatable Solar Array

Viewgraphs describing the development of an inflatable solar array as part of the Inflatable Torus Solar Array Technology (ITSAT) program are presented. Program phases, overall and subsystem designs, and array deployment are addressed

3D Simulations of Ion Thruster Accelerator Grid Erosion Accounting for Charge Exchange Ion Space Charge

Accelerator (accel) grid sputtering by ions formed through charge-exchange (CEX) reactions between beam ions and residual neutral gas is a critical life-limiting mechanism for gridded ion thrusters. The three-dimensional ion optics code CEX3D is designed to simulate this grid erosion for a single beamlet, with a particular emphasis on non-axisymmetric features such as the "pits and grooves" erosion commonly observed on the accel grid downstream face in two-grid thrusters. The treatment of CEX ions in the code was recently upgraded with a new particle-in-cell (PIC) module to account for the influence of these ions' space charge on the electrostatic potential downstream of the grids. In order to achieve reasonable computation times while resolving the Debye length near the grids and avoiding gross violations of the Courant-Friedrichs-Lewy (CFL) condition, macroparticle velocities in the PIC calculation are limited through a rescaling procedure that preserves ion trajectories and space charge density. The code accounts for beam divergence, finite momentum transfer in CEX collisions, and radial losses of CEX ions from the beam; these effects are important for determining the CEX ion flux to the accel grid because the calculated potential downstream of the grids can become very flat. The upgraded code has been used to simulate operation of NASA's Evolutionary Xenon Thruster (NEXT) during the 51 kHr Long Duration Test - a selection of results is presented and compared with experimental data

Two-Loop Quark Self-Energy in a New Formalism (II): Renormalization of the Quark Propagator in the Light-Cone Gauge

The complete two-loop correction to the quark propagator, consisting of the spider, rainbow, gluon bubble and quark bubble diagrams, is evaluated in the noncovariant light-cone gauge (lcg). (The overlapping self-energy diagram had already been computed.) The chief technical tools include the powerful matrix integration technique, the n^*-prescription for the spurious poles of 1/qn, and the detailed analysis of the boundary singularities in five- and six-dimensional parameter space. It is shown that the total divergent contribution to the two-loop correction Sigma_2 contains both covariant and noncovariant components, and is a local function of the external momentum p, even off the mass-shell, as all nonlocal divergent terms cancel exactly. Consequently, both the quark mass and field renormalizations are local. The structure of Sigma_2 implies a quark mass counterterm of the form $\delta m (lcg) = m\tilde\alpha_s C_F(3+\tilde\alpha_sW) + {\rm O} (\tilde\alpha_s^3)$, \tilde\alpha_s = g^2\Gamma(\eps)(4\pi)^{\eps -2}, with W depending only on the dimensional regulator epsilon, and on the numbers of colors and flavors. It turns out that \delta m(lcg) is identical to the mass counterterm in the general linear covariant gauge. Our results are in agreement with the Bassetto-Dalbosco-Soldati renormalization scheme.Comment: 36 pages Latex, 5 eps figures, to appear in Nucl.Phys.