Naval Postgraduate School

About: Naval Postgraduate School is a education organization based out in Monterey, California, United States. It is known for research contribution in the topics: Tropical cyclone & Boundary layer. The organization has 5246 authors who have published 11614 publications receiving 298300 citations. The organization is also known as: NPS & U.S. Naval Postgraduate School.

Models of Tropical Cyclone Wind Distribution and Beta-Effect Propagation for Application to Tropical Cyclone Track Forecasting

Abstract: A model of the tangential wind speed in the outer regions of tropical cyclones is proposed based on approximate conservation of angular momentum. The purpose is to derive an operationally useful model of the beta-effect propagation (BEP), which barotropic numerical models have shown to be primarily related to the outer wind structure. The functional dependence of the predicted BEP speeds over a range of latitudes and the radii Ro at which the cyclonic winds are reduced to zero is determined from dimensional analysis. Given the empirical nature of the profile and imprecise estimates of Ro, only four tropical cyclone sizes or outer wind structures are defined based on the magnitude of the BEP speeds and their relative contributions to the total motion. A second aspect of BEP from the barotropic model integrations is the development of a trailing anticyclone to the southeast of the tropical cyclone as a result of Rossby wave dispersion. The four tropical cyclone size categories or outer wind structu...

Microwave plasma based single step method for free standing graphene synthesis at atmospheric conditions

Abstract: Microwave atmospheric pressure plasmas driven by surface waves were used to synthesize graphene sheets from vaporized ethanol molecules carried through argon plasma. In the plasma, ethanol decomposes creating carbon atoms that form nanostructures in the outlet plasma stream, where external cooling/heating was applied. It was found that the outlet gas stream temperature plays an important role in the nucleation processes and the structural quality of the produced nanostructures. The synthesis of few layers (from one to five) graphene has been confirmed by high-resolution transmission electron microscopy. Raman spectral studies were conducted to determine the ratio of the 2D to G peaks (>2). Disorder D-peak to G-peak intensity ratio decreases when outlet gas stream temperature decreases.

Body of knowledge for software quality measurement

Abstract: Measuring quality is the key to developing high-quality software. The author describes two approaches that help to identify the body of knowledge software engineers need to achieve this goal. The first approach derives knowledge requirements from a set of issues identified during two standards efforts: the IEEE Std. 1061-1998 for a Software Quality Metrics Methodology and the American National Standard Recommended Practice for Software Reliability (ANSI/AIAA R-013-1992). The second approach ties these knowledge requirements to phases in the software development life cycle. Together, these approaches define a body of knowledge that shows software engineers why and when to measure quality. Focusing on the entire software development life cycle, rather than just the coding phase, gives software engineers the comprehensive knowledge they need to enhance software quality and supports early detection and resolution of quality problems. The integration of product and process measurements lets engineers assess the interactions between them throughout the life cycle. Software engineers can apply this body of knowledge as a guideline for incorporating quality measurement in their projects. Professional licensing and training programs will also find it useful.

Coordinated Control of Multisatellite Systems

Abstract: The problem of formation and reconŽ guration of multiple microsatellite systems is addressed A control scheme called the perceptive frame is adopted that integrates the decentralized feedback of each satellite with online sensor information to achieve the goal of formation keeping and intersatellite coordination The proposed design algorithm has the advantage of relative position keeping and easy formation reconŽ guration