An improvedmodel of the fundamental plasma emission of type III solar radio bursts is presented. It is shown that nonlinear conversion of a traveling Langmuir pump wave into an electromagnetic wave can occur via either convective or absolute hybrid modulational instabilities, resulting from the coupling of two wave triplets, with the Langmuir pump wave and ion-acoustic daughter wave common to b...

When a two-dimensional (2D) film is compressed to its stability limit, it explores the third dimension via collapse. Understanding this 2D-to-3D transition is of great importance as it provides insight into the origin of defects in thin films. This review draws attention to a reversible folding collapse first discovered in model lung surfactant systems and explores the driving forces for this m...

By JAMES C. ALEXANDER, ANDREW J. BERNOFF, ELIZABETH K. MANN, J. ADIN MANN Jr, JACOB R. WINTERSMITH AND LU ZOU Department of Mathematics, Case Western Reserve University, Cleveland, OH 44106, USA Department of Mathematics, Harvey Mudd College, Claremont, CA 91711, USA Department of Physics, Kent State University, Kent, OH 44242, USA Department of Chemical Engineering, Case Western Reserve Univer...

poly urea-formaldehyde was synthesized simply and rapidly from urea and formaldehyde by condensation polymerization and studied for the sorption of trace acid blue from aqueous solution. the optimum ph value for sorption of the acid blue was 4. experimental results showed that the sorption capacity of poly urea-formaldehyde for acid blue was determined. the synthetic polymer can be reused for 5...