Patents by Inventor David A. Dahl
David A. Dahl has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8129678Abstract: An ion cyclotron spectrometer may include a vacuum chamber that extends at least along a z-axis and means for producing a magnetic field within the vacuum chamber so that a magnetic field vector is generally parallel to the z-axis. The ion cyclotron spectrometer may also include means for producing a trapping electric field within the vacuum chamber. The trapping electric field may comprise a field potential that, when taken in cross-section along the z-axis, includes at least one section that is concave down and at least one section that is concave up so that ions traversing the field potential experience a net magnetron effect on a cyclotron frequency of the ions that is substantially equal to zero. Other apparatuses and a method for performing ion cyclotron spectrometry are also disclosed herein.Type: GrantFiled: June 17, 2010Date of Patent: March 6, 2012Assignee: Battelle Energy Alliance, LLCInventors: David A. Dahl, Jill R. Scott, Timothy R. McJunkin
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Publication number: 20110246866Abstract: A method and system for improving the quality of original metadata associated with media on a computer network, such as multimedia and streaming media, includes analyzing each field of the URL of the multimedia and streaming media. Each field is analyzed to identify new metadata associated with that field. Identified new metadata is added to the original metadata. In another embodiment, the fields in the URL are reorganized in reverse order and metadata associated with a prefix of fields of the reorganized URL is added to the original metadata. In yet another embodiment, the contents of the field next to the prefix of fields is used to improve the quality of the original metadata.Type: ApplicationFiled: April 11, 2011Publication date: October 6, 2011Inventors: Aram Christian Abajian, Robin Andrew Alexander, Ken Alan Berkun, Austin David Dahl, John Anthony Derosa, Scott Chao-Chueh Lee, CHARLES A. PORTER, Eric Carl Rehm, Srinivasan Sudanagunta, Jonathan Robert Nowitz
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Patent number: 7925967Abstract: A method and system for improving the quality of original metadata associated with media on a computer network, such as multimedia and streaming media, includes analyzing each field of the URL of the multimedia and streaming media. Each field is analyzed to identify new metadata associated with that field. Identified new metadata is added to the original metadata. In another embodiment, the fields in the URL are reorganized in reverse order and metadata associated with a prefix of fields of the reorganized URL is added to the original metadata. In yet another embodiment, the contents of the field next to the prefix of fields is used to improve the quality of the original metadata.Type: GrantFiled: June 8, 2001Date of Patent: April 12, 2011Assignee: AOL Inc.Inventors: Aram Christian Abajian, Robin Andrew Alexander, Ken Alan Berkun, Austin David Dahl, John Anthony Derosa, Scott Chao-Chueh Lee, Charles A. Porter, Eric Carl Rehm, Srinivasan Sudanagunta, Jonathan Robert Nowitz
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Patent number: 7894169Abstract: A method and apparatus for identifying a ground fault in a motor drive system that includes at least one three phase power conditioner that is linked to three phase supply lines and to positive and negative DC buses, the method comprising the steps of controlling the power conditioner at an operating frequency to convert power, while controlling the power conditioner to convert power, controlling the power conditioner to apply a common mode signal on each of the three phase supply lines where the common mode signal has a frequency that is different than the operating frequency, sensing the common mode signal on at least one of the three phase supply lines and when the common mode signal on the at least one of the three phase supply lines is greater than a threshold level, indicating that a ground fault has occurred.Type: GrantFiled: June 2, 2008Date of Patent: February 22, 2011Assignee: Rockwell Automation Technologies, Inc.Inventors: Carlos RodrÃguez Valdez, Russel Kerkman, David Dahl, Jeffrey McGuire, Nickolay Guskov
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Patent number: 7858950Abstract: An EDL includes a case surface and at least one electrode surface. The EDL is configured to receive through the EDL a plurality of ion beams, to generate an electrostatic field between the one electrode surface and either the case surface or another electrode surface, and to increase the separation between the beams using the field. Other than an optional mid-plane intended to contain trajectories of the beams, the electrode surface or surfaces do not exhibit a plane of symmetry through which any beam received through the EDL must pass. In addition or in the alternative, the one electrode surface and either the case surface or the other electrode surface have geometries configured to shape the field to exhibit a less abrupt entrance and/or exit field transition in comparison to another electrostatic field shaped by two nested, one-quarter section, right cylindrical electrode surfaces with a constant gap width.Type: GrantFiled: May 29, 2007Date of Patent: December 28, 2010Assignee: Battelle Energy Alliance, LLCInventors: David A. Dahl, Anthony D. Appelhans
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Publication number: 20100320378Abstract: An ion cyclotron spectrometer may include a vacuum chamber that extends at least along a z-axis and means for producing a magnetic field within the vacuum chamber so that a magnetic field vector is generally parallel to the z-axis. The ion cyclotron spectrometer may also include means for producing a trapping electric field within the vacuum chamber. The trapping electric field may comprise a field potential that, when taken in cross-section along the z-axis, includes at least one section that is concave down and at least one section that is concave up so that ions traversing the field potential experience a net magnetron effect on a cyclotron frequency of the ions that is substantially equal to zero. Other apparatuses and a method for performing ion cyclotron spectrometry are also disclosed herein.Type: ApplicationFiled: June 17, 2010Publication date: December 23, 2010Applicant: BATTELLE ENERGY ALLIANCE, LLCInventors: David A. Dahl, Jill R. Scott, Timothy R. McJunkin
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Publication number: 20100287159Abstract: A method and system for utilizing metadata to search for media, such as multimedia and streaming media, includes searching for the media, receiving results, extracting metadata associated with the media, enhancing the extracted metadata, and grouping the search results in accordance with attributes of the enhanced metadata. Enhancing and grouping include adding related metadata to the database of metadata, iteratively using metadata to search for more media related data, removing duplicate URLs, collapsing URLs that are variants of each other, and masking out superfluous terms from URLs. The resultant metadata and media files are available to users and search engines.Type: ApplicationFiled: May 14, 2010Publication date: November 11, 2010Inventors: Aram Christian ABAJIAN, Robin Andrew Alexander, Scott Chao-Chueh Lee, Austin David Dahl, John Anthony Derosa, Charles A. Porter, Eric Carl Rehm, Jennifer Lynn Kolar, Srinivasan Sudanagunta
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Publication number: 20100264308Abstract: An EDL includes a case surface and at least one electrode surface. The EDL is configured to receive through the EDL a plurality of ion beams, to generate an electrostatic field between the one electrode surface and either the case surface or another electrode surface, and to increase the separation between the beams using the field. Other than an optional mid-plane intended to contain trajectories of the beams, the electrode surface or surfaces do not exhibit a plane of symmetry through which any beam received through the EDL must pass. In addition or in the alternative, the one electrode surface and either the case surface or the other electrode surface have geometries configured to shape the field to exhibit a less abrupt entrance and/or exit field transition in comparison to another electrostatic field shaped by two nested, one-quarter section, right cylindrical electrode surfaces with a constant gap width.Type: ApplicationFiled: May 29, 2007Publication date: October 21, 2010Inventors: David A. Dahl, Anthony D. Appelhans
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Patent number: 7777182Abstract: An ion cyclotron spectrometer may include a vacuum chamber that extends at least along a z-axis and means for producing a magnetic field within the vacuum chamber so that a magnetic field vector is generally parallel to the z-axis. The ion cyclotron spectrometer may also include means for producing a trapping electric field within the vacuum chamber that includes at least a first section that induces a first magnetron effect that increases a cyclotron frequency of an ion and at least a second section that induces a second magnetron effect that decreases the cyclotron frequency of an ion. The cyclotron frequency changes induced by the first and second magnetron effects substantially cancel one another so that an ion traversing the at least first and second sections will experience no net change in cyclotron frequency.Type: GrantFiled: August 2, 2007Date of Patent: August 17, 2010Assignee: Battelle Energy Alliance, LLCInventors: David A. Dahl, Jill R. Scott, Timothy R. McJunkin
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Patent number: 7720836Abstract: A method and system for utilizing metadata to search for media, such as multimedia and streaming media, includes searching for the media, receiving results, extracting metadata associated with the media, enhancing the extracted metadata, and grouping the search results in accordance with attributes of the enhanced metadata. Enhancing and grouping include adding related metadata to the database of metadata, iteratively using metadata to search for more media related data, removing duplicate URLs, collapsing URLs that are variants of each other, and masking out superfluous terms from URLs. The resultant metadata and media files are available to users and search engines.Type: GrantFiled: July 7, 2004Date of Patent: May 18, 2010Assignee: AOL Inc.Inventors: Aram Christian Abajian, Robin Andrew Alexander, Scott Chao-Chueh Lee, Austin David Dahl, John Anthony Derosa, Charles A. Porter, Eric Carl Rehm, Jennifer Lynn Kolar, Srinivasan Sudanagunta
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Publication number: 20090319556Abstract: A computer-implemented method of generating a map view includes accessing a dataset having multiple records and multiple fields. One or more of the multiple fields are identified as geographical fields. Geographical codes are automatically associated with a first one of the identified geographical fields. A geographical map is generated for the dataset. Generating the geographical map includes generating a first plurality of marks on the geographical map. The first plurality of marks is positioned on the geographical map in accordance with the geographical codes associated with the first one of the identified geographical fields.Type: ApplicationFiled: June 20, 2008Publication date: December 24, 2009Inventors: Christopher Richard Stolte, Jock Douglas Mackinlay, Richard Michael Grantham Wesley, Ross Thomas Bunker, Austin David Dahl
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Publication number: 20090296289Abstract: A method and apparatus for identifying a ground fault in a motor drive system that includes at least one three phase power conditioner that is linked to three phase supply lines and to positive and negative DC buses, the method comprising the steps of controlling the power conditioner at an operating frequency to convert power, while controlling the power conditioner to convert power, controlling the power conditioner to apply a common mode signal on each of the three phase supply lines where the common mode signal has a frequency that is different than the operating frequency, sensing the common mode signal on at least one of the three phase supply lines and when the common mode signal on the at least one of the three phase supply lines is greater than a threshold level, indicating that a ground fault has occurred.Type: ApplicationFiled: June 2, 2008Publication date: December 3, 2009Inventors: Carlos Rodriguez Valdez, Russel Kerkman, David Dahl, Jeffrey McGuire, Nickolay Guskov
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Patent number: 7518106Abstract: An ion mobility spectrometer may include an inner electrode and an outer electrode arranged so that at least a portion of the outer electrode surrounds at least a portion of the inner electrode and defines a drift space therebetween. The inner and outer electrodes are electrically insulated from one another so that a non-linear electric field is created in the drift space when an electric potential is placed on the inner and outer electrodes. An ion source operatively associated with the ion mobility spectrometer releases ions to the drift space defined between the inner and outer electrodes. A detector operatively associated with at least a portion of the outer electrode detects ions from the drift space.Type: GrantFiled: December 14, 2006Date of Patent: April 14, 2009Assignee: Battelle Energy Alliance, LLCInventors: David A. Dahl, Jill R. Scott, Anthony D. Appelhans, Timothy R. McJunkin, John E. Olson
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Patent number: 7518105Abstract: An ion mobility spectrometer may include a flow channel having an inlet end and an outlet end. A deflection electrode is positioned within the flow channel so that a non-linear electric field is created between at least a portion of the flow channel and at least a portion of the deflection electrode when an electrostatic potential is placed across the deflection electrode and the flow channel. The ion mobility spectrometer also includes means for producing ions at a position upstream from the leading edge of the deflection electrode, so that ions produced thereby are deflected by the deflection electrode into the non-linear electric field. A detector positioned within the flow channel for detects ions from the non-linear electric field.Type: GrantFiled: December 14, 2006Date of Patent: April 14, 2009Assignee: Battelle Energy Alliance, LLCInventors: David A. Dahl, Jill R. Scott, Anthony D. Appelhans, Timothy R. McJunkin, John E. Olson
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Publication number: 20090032696Abstract: An ion cyclotron spectrometer may include a vacuum chamber that extends at least along a z-axis and means for producing a magnetic field within the vacuum chamber so that a magnetic field vector is generally parallel to the z-axis. The spectrometer may also include means for producing a trapping electric field within the vacuum chamber that includes at least a first section that induces a first magnetron effect that increases a cyclotron frequency of an ion and at least a second section that induces a second magnetron effect that decreases the cyclotron frequency of an ion. The cyclotron frequency changes induced by the first and second magnetron effects substantially cancel one another so that an ion traversing the first and second sections will experience no net change in cyclotron frequency.Type: ApplicationFiled: August 2, 2007Publication date: February 5, 2009Inventors: David A. Dahl, Jill R. Scott, Timothy R. McJunkin
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Publication number: 20080142697Abstract: An ion mobility spectrometer may include a flow channel having an inlet end and an outlet end. A deflection electrode is positioned within the flow channel so that a non-linear electric field is created between at least a portion of the flow channel and at least a portion of the deflection electrode when an electrostatic potential is placed across the deflection electrode and the flow channel. The ion mobility spectrometer also includes means for producing ions at a position upstream from the leading edge of the deflection electrode, so that ions produced thereby are deflected by the deflection electrode into the non-linear electric field. A detector positioned within the flow channel for detects ions from the non-linear electric field.Type: ApplicationFiled: December 14, 2006Publication date: June 19, 2008Inventors: David A. Dahl, Jill R. Scott, Anthony D. Appelhans, Timothy R. McJunkin, John E. Olson
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Publication number: 20080142700Abstract: An ion mobility spectrometer may include an inner electrode and an outer electrode arranged so that at least a portion of the outer electrode surrounds at least a portion of the inner electrode and defines a drift space therebetween. The inner and outer electrodes are electrically insulated from one another so that a non-linear electric field is created in the drift space when an electric potential is placed on the inner and outer electrodes. An ion source operatively associated with the ion mobility spectrometer releases ions to the drift space defined between the inner and outer electrodes. A detector operatively associated with at least a portion of the outer electrode detects ions from the drift space.Type: ApplicationFiled: December 14, 2006Publication date: June 19, 2008Inventors: David A. Dahl, Jill R. Scott, Anthony D. Appelhans, Timothy R. McJunkin, John E. Olson
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Patent number: 7308464Abstract: A system and process for augmenting automated agents to search network based data stores generate a set of rules that describes the contents contained within structured data stores. This set of rules allows an automated agent to perform a focused search of a structured data store, thus eliminating searching for unnecessary content. The structure of the data store is defined and entities are categorized. Additionally, templates are created defining data, such as metadata fields, related to the entities. These definitions, categorizations, and templates are incorporated into the set of rules, which is utilized by the agent to search a data store on a network, such as a web site.Type: GrantFiled: July 23, 2003Date of Patent: December 11, 2007Assignee: America Online, Inc.Inventors: Jonathan Robert Nowitz, Jennifer Weis, Julie T. Trott, Srinivasan Sudanagunta, Austin David Dahl, Michael Gerald Maitlen
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Patent number: 7259369Abstract: Ion mobility spectrometer apparatus may include an ion interface that is operable to hold positive and negative ions and to simultaneously release positive and negative ions through respective positive and negative ion ports. A first drift chamber is operatively associated with the positive ion port of the ion interface and encloses an electric field therein. A first ion detector operatively associated with the first drift chamber detects positive ions from the first drift chamber. A second drift chamber is operatively associated with the negative ion port of the ion interface and encloses an electric field therein. A second ion detector operatively associated with the second drift chamber detects negative ions from said second drift chamber.Type: GrantFiled: August 22, 2005Date of Patent: August 21, 2007Assignee: Battelle Energy Alliance, LLCInventors: Jill R. Scott, David A. Dahl, Carla J. Miller, Paul L. Tremblay, Timothy R. McJunkin
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Patent number: 7038216Abstract: Electrostatic shape-shifting ion optics includes an outer electrode that defines an interior region between first and second opposed open ends. A first inner electrode is positioned within the interior region of the outer electrode at about the first open end. A second inner electrode is positioned within the interior region of the outer electrode at about the second open end. A first end cap electrode is positioned at about a first open end of the first inner electrode so that the first end cap electrode substantially encloses the first open end of the first inner electrode. A second end cap electrode is positioned at about a second open end of the second inner electrode so that the second end cap electrode substantially encloses the second open end of the second inner electrode. A voltage source operatively connected to each of the electrodes applies voltage functions to each of the electrodes to produce an electric field within an interior space enclosed by the electrodes.Type: GrantFiled: December 23, 2004Date of Patent: May 2, 2006Assignee: Battelle Energy Alliance, LLCInventors: David A. Dahl, Jill R. Scott, Anthony D. Appelhans