Abstract: The present invention discloses a method and system for developing and operating interactive Web applications in a unified, light-weight, on-demand, modular server application framework. The present invention provides a novel unified approach utilizing a single programming language to develop interactive Web applications. The modular Web applications of the present invention operate at the server-side. The Web application of the present invention comprises one or more Web application modules written entirely in a scripting programming language. The Web application modules are interpreted and executed by the scripting language interpreter engine to generate all of the code necessary, such as the HTML and JavaScript code, to service the requests from the clients. Unlike existing server-based integrated solutions, however, the present invention does not require the entire Web application to be loaded at all times to be operational.

Abstract: A device is described which combines Acoustic and Electroacoustic spectrometers to characterize both particle size distribution and zeta potential for concentrated dispersed systems.The Acoustic Spectrometer measures both attenuation and sound speed for multiple frequencies using each measurement to help optimize and correct the other. The attenuation spectra is used to calculate particle size.The Electroacoustic Spectrometer measures Colloid Vibration Current (CVI), correcting the measured value using attenuation and sound speed data from the Acoustic Spectrometer. The Colloid Vibration Current is used to calculate zeta potential taking into account the particle size calculated from the acoustic measurement as well as particle interaction.Sound speed and multiple frequency CVI measurement provide additional experimental data to check the validity of the data.