Solid State Laser Disk Amplifier Architecture: The Normal-Incidence Stack
C. Brent Dane, Georg F. Albrecht, Mark D. Rotter
U.S. Patent 6,847,673 B2
January 25, 2005
Normal-incidence stack architecture coupled with diode-array pumping enables the power and energy per disk to be increased and reduces beam distortions by orders of magnitude. The beam propagation is no longer restricted to only one direction of polarization, and the laser becomes more amenable to robust packaging.
Performance Analysis of Distributed Applications Using Automatic Classification of Communication Inefficiencies
Jeffrey S. Vetter
U.S. Patent 6,850,920 B2
February 1, 2005
This system presents a technique for performance analysis that helps users understand the communication behavior of their message-passing applications. The system automatically classifies individual communications operations and reveals the cause of communication inefficiencies in an application. This classification allows the developer to quickly focus on the culprits of inefficient behavior, rather than manually foraging through massive amounts of performance data. Specifically, the system traces the message operations of message-passing interface applications and then classifies each event using a supervised learning technique called decision-tree classification. The decision tree may be trained using benchmarks that demonstrate both efficient and inefficient communication. The system can adapt to the target system’s configuration by using these benchmarks and thus can simultaneously automate the performance analysis process and improve classification accuracy. The system may improve the accuracy of performance analysis and dramatically reduce the amount of data that users must encounter.
Halbach Array Generator/Motor Having an Automatically Regulated Output Voltage and Mechanical Power Output
Richard F. Post
U.S. Patent 6,858,962 B2
February 22, 2005
The stationary portion, or the stator, of this motor–generator is positioned concentrically within the rotatable element, or the rotor, along its axis of rotation. The rotor includes a Halbach array. The stator windings are switched or commutated to provide a direct-current (dc) motor–generator much the same as in a conventional dc motor–generator. The voltage and power are automatically regulated by using centrifugal force to change the diameter of the rotor and thus vary the radial gap between the stator and the rotating Halbach array, as a function of the rotor’s angular velocity.
Electro-Optic Modulator Material
John J. Adams, Chris A. Ebbers
U.S. Patent 6,859,467 B2
February 22, 2005
This electro-optic device, designed for use with a laser beam, has a crystal with a first and second face. Applying a voltage across the crystal results in a net phase retardation on the polarization of a laser beam when the beam is passed through the crystal. In one configuration, the crystal is composed of a compound having the chemical formula ReAe40(BO3)3, where Re consists of one or more of the elements lanthanum, cerium, praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, and ytterbium plus yttrium and scandium; and Ae is calcium, strontium, or barium.
Using Histograms to Introduce Randomization in the Generation of Ensembles of Decision Trees
Chandrika Kamath, Erick Cantu-Paz, David Littau
U.S. Patent 6,859,804 B2
February 22, 2005
This system uses modules to create decision-tree ensembles. The system has steps to read the data, create a histogram, and evaluate a potential split according to some criterion using the histogram. It will then select a split point randomly in an interval around the best split, split the data, and combine multiple decision trees in ensembles.
Automated Macromolecular Crystallization Screening
Brent W. Segelke, Bernhard Rupp, Heike I. Krupka
U.S. Patent 6,860,940 B2
March 1, 2005
This automated macromolecular crystallization screening system produces a multiplicity of reagent mixes. Analysis plates produced by combining the reagent mixes with a sample are incubated to promote crystal growth. Images of the crystals are analyzed to determine whether the crystals are suitable for analysis by x-ray crystallography. The design of reagent mixes is then based on the expected suitability of the crystals for analysis. A second multiplicity of reagent mixes produced from this design is used for a second round of automated macromolecular crystallization screening. In one embodiment, the multiplicity of reagent mixes is determined by a random selection of reagent components.
Hybrid Heat Capacity-Moving Slab Solid-State Laser
Eddy A. Stappaerts
U.S. Patent 6,862,308 B2
March 1, 2005
Laser material is pumped and its stored energy is extracted in a heat-capacity laser mode at a high duty factor. When the laser material reaches a maximum temperature, it is removed from the lasing region. A subsequent volume of laser material is positioned into the lasing region to repeat the lasing process. The heated laser material is cooled passively or actively outside the lasing region.
Stepped Electrophoresis for Movement and Concentration of DNA
Robin R. Miles, Amy Wei-Yun Wang, Raymond P. Mariella, Jr.
U.S. Patent 6,866,759 B2
March 15, 2005
A fluidic channel patterned with a series of thin-film electrodes makes it possible to move and concentrate DNA in a fluid passing through the channel. The DNA has an inherent negative charge, and applying a voltage between adjacent electrodes causes the DNA to move. When a series of electrodes is used, if one electrode voltage or charge is made negative with respect to the adjacent electrodes, the DNA is repelled from this electrode and attaches to a positive-charge electrode in the series. The DNA can be moved to and concentrated over the remaining positive electrodes by sequentially making the next electrode of the series negative.
Laser Driven Compact Ion Accelerator
U.S. Patent 6,867,419 B2
March 15, 2005
A laser-driven compact ion source includes a light source that produces an energy pulse. A light source guide directs the energy pulse to a target and produces an ion beam that can be transported to a desired destination.
Portable Apparatus and Method for Assisting in the Removal and Emplacement of Pipe Strings in Boreholes
Brian R. Mitchell
U.S. Patent 6,868,923 B2
March 22, 2005
This portable support apparatus can be used to install and remove a series of connectable pipe strings from a ground-level borehole. The support apparatus has a base, an upright extending from the base, and in one configuration, a pair of catch arms extending from the upright to define a catch platform. The catch arms hold the upper connector end of a pipe string by releasably catching the underside of a pipe coupler connecting two pipe strings in the series. The connector end is thus positioned at the proper elevation for an operator to stand upright while coupling and uncoupling the pipe strings. Processes are also included for using this support apparatus to install and remove a series of pipe strings.