Introduction and organization The use of synchrotron based high-energy x-ray scattering in materials/engineering programs is relatively new to both the synchrotron and engineering communities in the United States. In Europe such efforts are more advanced with engineering beam lines existent or under construction at ESRF in France, at PETRA III in Germany, and at Diamond in England. The industri...

The scalar theory of the self-focusing of an optical beam is not valid for a very narrow beam, and a correct description of the beam behavior requires a vector analysis in this case. A vector nonparaxial theory is developed from the vector Maxwell equations by application of an order-of-magnitude analysis method. For the same input beam, the numerical results of self-focusing from both scalar a...

The close analogy between geometrical optics and the classical theories of charged-particle beam optics have been known for a very long time. In recent years, quantum theories of charged-particle beam optics have been presented with the very expected feature of wavelengthdependent effects. With the current development of non-traditional prescriptions of Helmholtz and Maxwell optics respectively...

This work deals with the transient hydroelastic analysis of a sandwich beam which represents a boat hull. The beam is subjected to slamming pressure while it enters into water with constant vertically downward velocity. A coupled hydroelastic finite element model is developed using higher order shear and normal deformation theories for the faces and the core of the beam and the velocity potenti...

Mathematical models, for the stress analysis of symmetric multidirectional double cantilever beam DCB specimen using classical beam theory, first and higher-order shear deformation beam theories, have been developed to determine the Mode I strain energy release rate SERR for symmetric multidirectional composites. The SERR has been calculated using the compliance approach. In the present study, ...

This paper tries to contribute towards the solution of an important question raised in [4]: What is a Software Engineering (SE) specific theory? Which are the main features of a theory that is endemic to SE? In this paper we will use “theory” as the term is used in traditional sciences. Other uses of the term “theory” are discussed. Finally, we propose to focus on the reference class and on the...

New successes in dealing with set theories by means of stateof-the-art theorem-provers may ensue from terse and concise axiomatizations, such as can be moulded in the framework of the (fully equational) Tarski-Givant map calculus. In this paper we carry out this task in detail, setting the ground for a number of experiments.