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White Papers

Finite Element Implementation of Advanced Failure Criteria for Composites NASA recently developed LaRC02, a set of first-ply-failure criteria for composites that have been shown to be accurate and physically consistent. This white paper from Noran Engineering describes the LaRC02 criterion features and its implementation into NEiNastran. MicroTCA(TM) System Management This white paper from GE Fanuc describes the management capabilities of MicroTCA, which include temperature and voltage monitoring, FRU insertion and removal, and electronic keying.

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Laser Measurement

University of Rochester (Rochester, NY) researchers developed a technique, using a laser, white light, and a reflective tube, that in 60 seconds or less measures multiple chemicals in body fluids. The technique tests urine and blood serum for common chemicals important to monitoring and treatment of diabetes and cardio- vascular, kidney, urinary diseases, and lends itself to the development of fast batch testing in hospitals and other clinical settings. The Rochester team measured 11 chemicals in blood serum, including total protein, cholesterol, LDL and HDL levels, glucose, triglyceride, albumin, bilirubin, blood urea nitrogen, globulin, and CO2. In urine, they identified urea nitrogen and creatinine. For more information, click here.

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Momentum Measurement

Scientists at the Naval Research Laboratory-Stennis Space Center (NRL-SSC, Washington, DC) have directly derived the air-sea momentum exchange at the ocean interface using observed ocean currents under Hurricane Ivan and determined that it decreases when winds exceed 32 meters per second. Proper evaluation and measurement of the air-sea exchange under extreme winds is of great importance for modeling and forecasting used in hurricane studies, such as in forecasting of storm track and intensity, surges, waves, and currents. Since coastal regions have become heavily populated, the results should be of widespread interest to the public, oceanographers, atmospheric scientists, numerical modelers, oil and gas concerns, commerce, and government agencies. For more information, click here.

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Technologies of the Week

A fiber optic link noise measurement and optimization system is available. It includes an apparatus for measuring noise signals in each fiber optic link and apparatus for generating system performance data corresponding to the noise signals measured by the noise measurement apparatus. View this technology here. A noise cancellation system has been disclosed that balances the photocurrents derived by a sensorÂ’s measurement and reference signals. Applications include any measurement device that detects a small signal in combination with high noise content and further utilizes a reference signal. View this technology here. The Technologies of the Week describe inventions offered for license through the yet2.com marketplace. Search over $2.5 billion of licensable technologies at www.yet2.com.

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Smell Test

Developed by scientists at the University of Cincinnati (UC, Cincinnati, OH), the Sniff Magnitude Test (SMT) may sniff out olfactory disorders that could be an early warning of AlzheimerÂ’s disease, ParkinsonÂ’s disease, and other problems outside the typical sensory loss associated with aging. The sense of smell is one of the less robust senses in humans; it is more susceptible to harm due to the fact there is less neurological machinery in the brain devoted to processing incoming information via smell. Due to this weakness, and with regard to disease-caused brain injury, the sense of smell may be sensitive to loss earlier in the disease process. For more information, click here.

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White Papers

Confronting the Antenna Challenges in TodayÂ’s Military Applications Antenna engineers are now face increasingly difficult concerns regarding directionality, frequency variations, isolation, and testing. This paper from Emerson & Cuming Microwave Products describes how the use of microwave absorbers and dielectric materials can offer todayÂ’s antenna engineers solutions to address these challenges. Sustainable Design -- Not Just for Architecture Any More This white paper from SolidWorks notes that sustainable design is a comprehensive, holistic approach to creating products and systems that are environmentally benign, socially equitable, and economically viable.

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Current Attractions

In a crash, keeping the occupants alive and uninjured is paramount. As a part of the Structural Dynamics Branch in the Research and Technology Directorate at NASA Langley, the Landing and Impact Research Facility (LandIR) tests the safety of aircraft by crashing them. Dr. Karen Jackson is part of the research team. According to Dr. Jackson, “LandIR was originally built in the early 1960s as a lunar landing research facility. Now LandIR is a full-scale test facility for air and spacecraft. We’re evaluating landing and attenuating systems for the Crew Exploration Vehicle, the Orion. These are not for lunar impacts, but when the capsule comes back to Earth.” Read the “Who's Who at NASA” interview with Dr. Karen Jackson on page 10 of the April issue, or click here.

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