Finite laser beam particle simulations of beat wave acceleration show that a coherent plasma wave... more Finite laser beam particle simulations of beat wave acceleration show that a coherent plasma wave excited by two colinear laser beams at a difference frequency equal to the plasma frequency can produce maximum electron energies as predicted by simple one dimensional theory. The time to saturation amplitude of the plasma wave electric field agrees with the Rosenbluth-Liu theory. Stimulated Raman
Two-dimensional particle simulations with a finite laser beam show that beat wave acceleration ca... more Two-dimensional particle simulations with a finite laser beam show that beat wave acceleration can produce energetic electrons as seen in one-dimensional simulations. The competition and interplay between various nonlinear phenomena -- backward Raman scattering, stimulated Compton scattering, self-focussing, filamentation, and harmonic generation -- were delineated through the two-dimensional simulations.
Los Alamos National Laboratory has developed a virtual patient record system called TeleMed which... more Los Alamos National Laboratory has developed a virtual patient record system called TeleMed which is based on a distributed national radiographic and patient record repository located throughout the country. Without leaving their offices, participating doctors can view clinical drug and radiographic data via a sophisticated multimedia interface. For example, a doctor can match a patient`s radiographic information with the data in the repository, review treatment history and success, and then determine the best treatment. Furthermore, the features of TeleMed that make it attractive to clinicians and diagnosticians make it valuable for teaching and presentation as well. Thus, a resident can use TeleMed for self-training in diagnostic techniques and a physician can use it to explain to a patient the course of their illness. In fact, the data can be viewed simultaneously by users at two or more distant locations for consultation with specialists in different fields. This capability is o...
One of the most powerful tools available for telemedicine is a multimedia medical record accessib... more One of the most powerful tools available for telemedicine is a multimedia medical record accessible over a wide area and simultaneously editable by multiple physicians. The ability to do this through an intuitive interface linking multiple distributed data repositories while maintaining full data integrity is a fundamental enabling technology in healthcare. The author discusses the role of distributed object technology using CORBA in providing this capability including an example of such a system (TeleMed) which can be accessed through the World Wide Web. Issues of security, scalability, data integrity, and useability are emphasized.
Laser Interaction and Related Plasma Phenomena, 1986
The interaction between an intense laser and an underdense plasma results in many different pheno... more The interaction between an intense laser and an underdense plasma results in many different phenomena. In particular, the interaction may result in collective processes called parametric instabilities, some of which produce plasma waves1,2,3. The plasma waves can eventually produce energetic electrons as they damp away their energy. The generation of energetic electrons is detrimental for laser fusion4, essential for plasma particle accelerators5 and essential in current drive in tokamaks6, to name a few subject areas.
Finite laser beam particle simulations of beat wave acceleration show that a coherent plasma wave... more Finite laser beam particle simulations of beat wave acceleration show that a coherent plasma wave excited by two colinear laser beams at a difference frequency equal to the plasma frequency can produce maximum electron energies as predicted by simple one dimensional theory. The time to saturation amplitude of the plasma wave electric field agrees with the Rosenbluth-Liu theory. Stimulated Raman
Two-dimensional particle simulations with a finite laser beam show that beat wave acceleration ca... more Two-dimensional particle simulations with a finite laser beam show that beat wave acceleration can produce energetic electrons as seen in one-dimensional simulations. The competition and interplay between various nonlinear phenomena -- backward Raman scattering, stimulated Compton scattering, self-focussing, filamentation, and harmonic generation -- were delineated through the two-dimensional simulations.
Los Alamos National Laboratory has developed a virtual patient record system called TeleMed which... more Los Alamos National Laboratory has developed a virtual patient record system called TeleMed which is based on a distributed national radiographic and patient record repository located throughout the country. Without leaving their offices, participating doctors can view clinical drug and radiographic data via a sophisticated multimedia interface. For example, a doctor can match a patient`s radiographic information with the data in the repository, review treatment history and success, and then determine the best treatment. Furthermore, the features of TeleMed that make it attractive to clinicians and diagnosticians make it valuable for teaching and presentation as well. Thus, a resident can use TeleMed for self-training in diagnostic techniques and a physician can use it to explain to a patient the course of their illness. In fact, the data can be viewed simultaneously by users at two or more distant locations for consultation with specialists in different fields. This capability is o...
One of the most powerful tools available for telemedicine is a multimedia medical record accessib... more One of the most powerful tools available for telemedicine is a multimedia medical record accessible over a wide area and simultaneously editable by multiple physicians. The ability to do this through an intuitive interface linking multiple distributed data repositories while maintaining full data integrity is a fundamental enabling technology in healthcare. The author discusses the role of distributed object technology using CORBA in providing this capability including an example of such a system (TeleMed) which can be accessed through the World Wide Web. Issues of security, scalability, data integrity, and useability are emphasized.
Laser Interaction and Related Plasma Phenomena, 1986
The interaction between an intense laser and an underdense plasma results in many different pheno... more The interaction between an intense laser and an underdense plasma results in many different phenomena. In particular, the interaction may result in collective processes called parametric instabilities, some of which produce plasma waves1,2,3. The plasma waves can eventually produce energetic electrons as they damp away their energy. The generation of energetic electrons is detrimental for laser fusion4, essential for plasma particle accelerators5 and essential in current drive in tokamaks6, to name a few subject areas.
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