Magic angle (54.7°) gradient and minimal surfaces in quadruple micellar helices

The first self-organized quadruple helices consisting of nonpolymeric material have been obtained from N-octyl-and N-dodecyl-ᴅ-gluconamides in water. They have been characterized by electron microscopy, image analysis, and computer modelling. The pitch of the helices is equal to (2π x molecular bilayer diameter); their gradient conforms with the magic angle (54.7°). The quadruple helices rearrange in aqueous gels to a single helix made of circular 4-fold layers of molecules, a pitch of 7.4 nm, and a gradient of 82 ± 3°. This quadruple layer may already contain head-to-tail oriented molecules, which are exclusively found in the final crystal sheets. The process of crystallization, from highly curved micellar fibers to planar crystal sheets, proceeds on minimal sufaces

The COSMO solution to the SWS challenge mediation problem scenarios: an evaluation

During the course of our participation in the Semantic Web Services (SWS) Challenge, we have shown how the concepts defined in the COnceptual Services MOdeling (COSMO) framework for the modeling, reasoning and analysis of services can be used to solve the Mediation Problem Scenarios of the Challenge. Along with the service-oriented refinement and composition paradigm of COSMO, our approach is also based on model-driven and goal-oriented principles where the semantic integration of applications is designed at a layer of abstraction higher than technology specifications. The objective of this paper is to evaluate our previous and current research efforts towards advancing our solution to the semantic integration of service-oriented applications, particularly, using the mediation problem scenarios of the Challenge. We do this by presenting the state of the art of our solution while reporting our experience with applying our solution to the scenarios including lessons learned and identified research challenges