A rapid, green and efficient method for the synthesis of 14-aryl-14H-dibenzo[a,j]xanthene derivatives through a one-pot condensation of 2-naphthol with various aromatic aldehydes in the presences of several acidic ionic liquids including [PSMIM]Cl, [BMIM]HSO4, [BMIM]Cl, [BMIM]Br, and [BMIM]BF4 as organocatalysts and task-specific acidic ionic liquids (AILs) under solvent-free conditions is desc...

This article presents an analysis of free vibration of elastically supported Timoshenko beams by using the spectral element method. The governing partial differential equation is elaborated to formulate the spectral stiffness matrix. Effectively, the non classical end boundary conditions of the beam are the primordial task to calibrate the phenomenon of the Timoshenko beam-soil foundation inter...

This paper proposes a methodology that uses hybrid systems to model multiple robots in the execution of cooperative tasks. Basically, each robot is represented by a hybrid automaton and the cooperative task execution is modeled by the composition of several automata. We describe in details our approach to perform the composition of these automata and demonstrate the effectiveness of the propose...

Template-based composition of web services is considered as useful middle-way between their manual ’programming in the large’ and fully automatic ’AI-planning-style’ composition. This is also relevant for applications analysing the content and structure of the web space. As simple proof of concept, we simulate this approach on a collection of services, templates, data objects and ontological kn...