Mr. Brian S. Krantz Profile

Brian S. Krantz

Associate Engineer at Booz Allen Hamilton Inc

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Publications (4)

Proceedings Article | 27 May 2005 Paper

Microsensors for border patrol applications

Dwight Falkofske, Brian Krantz, Ron Shimazu, Victor Berglund

Proceedings Volume 5796, (2005) https://doi.org/10.1117/12.607423

KEYWORDS: Sensors, Sensor networks, Telecommunications, Microsensors, Data fusion, Transducers, Defense and security, Cameras, Data communications, Homeland security

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A top concern in homeland security efforts is the lack of ability to monitor the thousands of miles of open border with our neighbors. It is not currently feasible to continually monitor the borders for illegal intrusions. The MicroSensor System (MSS) seeks to achieve a low-cost monitoring solution that can be efficiently deployed for border patrol applications. The modifications and issues regarding the unique requirements of this application will be discussed and presented. The MicroSensor System was developed by the Defense Microelectronics Activity (DMEA) for military applications, but border patrol applications, with their unique sensor requirements, demand careful adaptation and modification from the military application. Adaptation of the existing sensor design for border applications has been initiated. Coverage issues, communications needs, and other requirements need to be explored for the border patrol application. Currently, border patrol has a number of deficiencies that can be addressed with a microsensor network. First, a distributed networked sensor field could mitigate the porous border intruder detection problem. Second, a unified database needs to be available to identify aliens attempting to cross into the United States. This database needs to take unique characteristics (e.g. biometrics, fingerprints) recovered from a specialized field unit to reliably identify intruders. Finally, this sensor network needs to provide a communication ability to allow border patrol officers to have quick access to intrusion information as well as equipment tracking and voice communication. MSS already addresses the sensing portion of the solution, including detection of acoustic, infrared, magnetic, and seismic events. MSS also includes a low-power networking protocol to lengthen the battery life. In addition to current military requirements, MSS needs a solar panel solution to extend its battery life to 5 years, and an additional backbone communication link. Expanding the capabilities of MSS will go a long way to improving the security of the nation's porous borders.

Proceedings Article | 27 May 2005 Paper

MicroSensors Systems: detection of a dismounted threat

Bill Davis, Victor Berglund, Dwight Falkofske, Brian Krantz

Proceedings Volume 5796, (2005) https://doi.org/10.1117/12.606831

KEYWORDS: Sensors, Magnetism, Telecommunications, Transducers, Infrared sensors, Sensor networks, Packaging, Magnetic sensors, Acoustics, Microsensors

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Proceedings Article | 30 November 2004 Paper

MicroSensors Systems: detection of a dismounted threat

Ron Shimazu, Victor Berglund, Dwight Falkofske, Brian Krantz

Proceedings Volume 5611, (2004) https://doi.org/10.1117/12.581101

KEYWORDS: Sensors, Magnetism, Telecommunications, Magnetic sensors, Acoustics, Microsensors, Infrared sensors, Sensor networks, Packaging, Transducers

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SPIE Journal Paper | 1 July 1996 Open Access

Development of a noninvasive diabetes screening device using the ratio of fluorescence to Rayleigh scattered light

Nai-Teng Yu, Brian Krantz, Jonathan Eppstein, Keith Ignotz, Mark Samuels, James Long, John Price

JBO, Vol. 1, Issue 03, (July 1996) https://doi.org/10.1117/12.10.1117/12.240661

KEYWORDS: Luminescence, Control systems, Absorption, Geometrical optics, Calibration, Light scattering, Signal attenuation, Lamps, Sensors, Confocal microscopy

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We have developed a new lens measurement system (LMS) that simultaneously measures the intensities of fluorescence and Rayleigh components at various distances into the lens along the optical axis. The noninvasive measurement is performed through an undilated pupil, and with the assistance of a pupil tracking system that facilitates maintaining the x and y positions of the sample volume (ca. 300 mm in length, 600 mm high, and 80 mm wide) to within 6100 mm of any programmed "lock" position. The intensity of the Rayleigh component that is used to normalize the measured fluorescent signal serves to correct the attenuation effects due to absorption and lens light scatter (Mie–Tyndall type). This report, resulting from a SpectRx Site L clinical study using a refined instrumentation (SpecRx Scan V), presents analysis of fluorescence and Rayleigh data from the lenses of 923 controls and 239 diabetic subjects (45 Type I and 194 Type II) ranging from 23 to 75 years old. Fluorescence and Rayleigh data have been obtained via confocal mode from various locations nominally along the lens optical axis (the true trajectory of a sample volume could be shown in a figure) for controls and diabetics, at different ages, using three pairs of excitation and collection wavelengths: 364/495 nm, 434/495 nm, and 485/515 nm. For control subjects, there exists a strong, almost linear relationship between age and fluorescence, while diabetic subjects tend to deviate from this age fluorescence relationship. Our data show that the lenses of diabetic patients are subject to an accelerated aging process, presumably due to an elevated level of brown and fluorescent protein adducts and crosslinks from nonenzymatic glycosylation (Maillard-Amadori reactions). We have also shown that by using the measured Rayleigh profiles to normalize the measured fluorescence, most of the absorption effects are removed and therefore the separation between the fluorescence of diabetics and controls is greatly improved.

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