Single-walled, jacketed aluminum tanks have been conceived for storing liquefied natural gas (LNG) in LNG-fueled motor vehicles. Heretofore, double- wall steel tanks with vacuum between the inner and outer walls have been used for storing LNG. In comparison with the vacuum-insulated steel tanks,...

The immediately preceding article includes an example in which a composite overwrap on a pressure vessel contains wound filaments made of a hybrid of high-strength carbon fibers and poly(phenylene benzobisoxazole) [PBO] fibers. This hybrid material is chosen in an effort to increase the...

Structural components made of amalgams can be made to have tensile strengths much greater than previously known to be possible. Amalgams, perhaps best known for their use in dental fillings, have several useful attributes, including room- temperature fabrication, corrosion resistance, dimensional...

Software is currently being developed at Ohio State University that will one day help scientists operate big-budget research instruments, such as high-powered microscopes and telescopes, over the Internet. The need for such capability, which is being driven by the high cost of doing research, is growing rapidly. By using...

The John H. Glenn Research Center introduces the Portable Unit for Metabolic Analysis (PUMA), an instrument that measures quantities indicative of human metabolic function. The PUMA makes time-resolved measurements of temperature, pressure, flow, and the partial pressures of oxygen and carbon dioxide in breath during inhalation and...

Abdominal obesity is a known independent risk factor for heart disease. Based on results of the European Prospective Investigation into Cancer cohort study (Epic-Norfolk), researchers have found that using the waist-hip ratio rather than waist measurement alone is a better predictor of heart disease risk. The research was based on...