Abstract: A mathematical model which reproduces several qualitative features of cancerous tumor growth is proposed. The onset of unstable growth is characterized by a dimensionless number, which is defined ...

Abstract: In an effort to understand the cavity growth mechanisms occurring during an Underground Coal Gasification (UCG) test, a study of the thermomechanical effects has been initiated at Sandia National ...

Abstract: Metal working fluid (MWF) emulsions are utilized as coolants and lubricants in machining processes like turning or drilling. During their operation life time cycle, MWFs change their properties due to impacting stresses ...

Abstract: The vertical growth, diameters and trajectories of cumulus clouds observed over the San Francisco Peaks near Flagstaff, Ariz., were determined from photogrammetric measurements. New clouds formed in a small, well defined ...

Abstract: A time-dependent, one-dimensional model of the life cycle of an isolated warm cumulus cloud is presented that combines the vertical equation of motion, the equation of mass continuity, the first law of thermodynamics, and ...

Abstract: Presented in this paper is a procedure for selecting the H∞ performance weights for a class of nonlinear feedback systems modeled by a truncated Volterra series. The performance weight selection ...

Abstract: The static and dynamic behavior of plane frames composed of thinwalled steel members is presented. Frame analysis includes post‐local‐buckling and/or first‐order geometric nonlinearities. Post‐local‐buckling behavior is ...

Abstract: Tornado formation by turbulent mixing of two horizontal air currents and a vertical downdraft, as in the Wokingham model, has been simulated in the laboratory. Without the presence of the downdraft, vertices with lifetimes ...

Abstract: A major impediment to the development of computer algorithms for the automatic classification of ice particle types found in the atmosphere as measured by a Particle Measuring System two-dimensional probe is the difficulty ...