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ALPHA_I, Remote Manufacturing, and Solid Freeform Fabrication
Alpha_l is a nonuniform rational B-spline (NURBs) based solid modeling system that
has been developed at the University of Utah over the past 10 years. In addition to being
useful in modeling objects that are described by simple rotation and extrusion operations,
the real power of Alpha_l is demonstrated in the modeling of complex parts with sculptured
surfaces. For the past several years, a major research thrust has been to use Alpha_l to
semi-automatically generate process plan information and numerical control code to manufacture
mechanical parts directly from the models. A long term goal is to support an on-line
remote manufacturing facility for producing prototype parts. Recently, a 3D Systems stereo
lithography machine has been added to the advanced manufacturing laboratory. The stereo
lithography process and other SFF techniques are of particular interest for supporting a
remote manufacturing facility in that these processes are inherently much safer than numerically
controlled machining. Special Alpha_l interfaces including a new slicing algorithm
are being developed for the SFF machine use. By generating a SFF part directly from
its NURBs description, Alpha_l should facilitate the manufacture of complex parts while
providing smoother surfaces.Mechanical Engineerin
Book Reviews
The Modern Legal Philosophy Series; Borchard: Guide to the Law and Legal Literature of German
Electrodynamic effects of Jupiter's satellite Io
Electrodynamic effects of Jupiters satellite I
IMPACTS OF MAPLE SYRUP GRADING LAWS ON THE MAPLE PRODUCING REGIONS OF UNITED STATES AND CANADA
Agricultural and Food Policy,
Electron Holes and Heating in the Reconnection Dissipation Region
Using particle-in-cell simulations and kinetic theory, we explore the
current-driven turbulence and associated electron heating in the dissipation
region during 3D magnetic reconnection with a guide field. At late time the
turbulence is dominated by the Buneman and lower hybrid instabilities. Both
produce electron holes that co-exist but have very different propagation
speeds. The associated scattering of electrons by the holes enhances electron
heating in the dissipation region.Comment: 14 pages, 5 figures, submitted to GR
Book Reviews
Frost: A Treatise on Guaranty Insurance and compensated Suretyship including therein as subsidiary branches, The Law of Fidelity, Commercial and Judicial Insurance, &c.; Freeman: The American Reports. Containing the Cases of General Value and Authority. Decided int eh Courts of Last Resort of the Several States.;Green: Digest of the Decisions of the Courts of last resort of the several states from 1904 to 1909 contained in the American State Reports, vols. 97 to 120 inclusive, and of the notes to cases reported therein.; the Earl of Halsbury et al.: The Laws of England, Being a Complete Statement of the Whole Law of England; Huddy: the Law of Automobiles (2nd ed.); Gilmore: Cases on the Law of Partnership. Including limited partnerships, Selected form Decisions of English and American Courts; Mechem: Cases on Damages. Selected from Decisions of English and American Courts
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