April 1, 2010 NASA Tech Briefs - April 2010 - Vol. 34 No. 4 Here are links to this issue's Features, Tech Briefs, Products and more. You can download the complete issue, LOGIN TO DOWNLOAD Don't have an account? Sign up here. Subscribe to future issues. SUBSCRIBE Inside this issue Supplements Features Eye on Innovation Reducing Risk With Model-Driven Development Application Briefs Deformable Mirrors Key to Advancement of Space Imaging Research Simulation Software Helps Phoenix Mission Interpret Data From Mars Monitoring Carbon Composite Structures With Optical Fiber Sensors Who's Who Mark Polansky, Astronaut, Johnson Space Center Articles Meeting the Demand for Complex Communications Design Tech Briefs Photonics Focusing Light Beams To Improve Atomic-Vapor Optical Buffers Physical Sciences Active and Passive Hybrid Sensor AlGaN Ultraviolet Detectors for Dual-Band UV Detection Method for Detecting Perlite Compaction in Large Cryogenic Tanks Directional Spherical Cherenkov Detector Using Thin-Film Thermometers as Heaters in Thermal Control Applications System for Hydrogen Sensing Manufacturing & Prototyping Coaxial Propellant Injectors With Faceplate Annulus Control Adaptable Diffraction Gratings With Wavefront Transformation Software Natural-Language Parser for PBEM Policy Process Editor for P³BM Software A Quality System Database Trajectory Optimization: OTIS 4 Computer Software Configuration Item-Specific Flight Software Image Transfer Script Generator Materials Optimizing a Laser Process for Making Carbon Nanotubes Thermogravimetric Analysis of Single-Wall Carbon Nanotubes Information Sciences Efficient Bit-to-Symbol Likelihood Mappings Landmark Detection in Orbital Images Using Salience Histograms Capacity Maximizing Constellations Mechanics & Machinery Quick-Response Thermal Actuator for Use as a Heat Switch Robotic Arm Comprising Two Bending Segments Foil Gas Thrust Bearings for High-Speed Turbomachinery Electronics & Computers K-Band Traveling-Wave Tube Amplifier Sideband-Separating, Millimeter-Wave Heterodyne Receiver Simplified Load-Following Control for a Fuel Cell System Loosely Coupled GPS-Aided Inertial Navigation System for Range Safety Modified Phasemeter for a Heterodyne Laser Interferometer Products TRIO-UPS 2009 Product of the Year Winners 2009 Product of the Year Winners 2009 Product of the Year Winners Photonics Tech Briefs LOGIN TO DOWNLOAD Subscribe to future issues. SUBSCRIBE Briefs Focusing Light Beams To Improve Atomic-Vapor Optical Buffers Digitally Enhanced Heterodyne Interferometry Applications Monitoring Carbon Composite Structures With Optical Fiber Sensors Articles Using Aspheres To Increase Optical System Performance Products Product of the Month: Ultra Compact Diode Laser Selective Wavelength Photodiodes Optical Vector Analyzer Microscope Focus Controller Camera Control Units SWIR InGaAs Digital Video Linescan Camera Optical Replication Process Miniature Spectrometers Optical Spectrometer Non-Contact Laser Shutters Glass-Glass Photovoltaic Modules RGB Laser Driver Boreoscope Camera Scalable Shutters Solar On/Off Grid Power Platform Optoelectronic Analyzer Rod-Type Lasers Motion Control Technology LOGIN TO DOWNLOAD Subscribe to future issues. SUBSCRIBE Briefs Low-Friction, Low-Profile, High-Moment Two-Axis Joint Miniature Multi-Axis Mechanism for Hand Controllers Magnetostrictive Brake Products DC Motors Rotary Encoders MEMS Inclinometer DC Gearmotor Servomotor Brakes Linear Stages Mechanically Commutated Drive Servo Amplifier Magnetic Encoder Rotary Stage Applications Rugged-Duty Actuator Enhances State-of-the-Art Pool/Spa Lift Articles Reducing Electromagnetic Interference in Motion Systems View the discussion thread.