Abstract The purpose of this work is to design an energy scavenging system. system scavenges ambient from indoor Wi-Fi routers. It makes use low cost, environment-friendly and widely available corrugated cardboard substrate. circuit realized on metallic layers made low-cost copper tape. A Villard rectifier used convert the RF into dc. measured scavenged power at density 10 μ W cm −2 −15.76 dBm ...

The research and development of computer-based, networked learning environments will be built around electronic communication and collaboration services that will play a significant role in the improvement of the learning procedure. Applications of this kind provide tutors and trainees with the ability of continual, close and efficient cooperation, en masse as well as individually. The goal of ...

There are many knowledge-based data mining frameworks and it is common to think that new ones can not come up with anything new. This article refutes such claims. We propose a sophisticated unification mechanism and two-tier machine cache system aimed at saving time and memory. No machine is run twice. Instead, machines are reused wherever they are repeatedly requested (regardless of request co...

TiCl4/nano-cellulose as a biodegradable and eco-friendly Lewis acid catalyst was synthesized via reaction of nano-cellulose and TiCl4. This catalyst was characterized and used for synthesis of asymmetric highly functionalized tetrahydropyridines via a five-component condensation reaction of p-substituted anilines, aldehydes and ethyl acetoacetate under solvent-free condition. Simple methodology...

Photochemical reactions are expected to have an increasing role in organic synthesis with the drive towards environment-friendly reactions. Some examples illustrating the scope and versatility of radical alkylation of electrophilic alkenes via photoinduced electron transfer are presented. A few applications in special fields are mentioned. PHOTOCHEMISTRY FOR ORGANIC SYNTHESIS Photoinitiated rea...

Virtual endoscopy has recently arisen as a powerful diagnostic tool for examining the interior structures of bronchus, colon, and etc. In contrast to optical endoscopy that is invasive, virtual endoscopy is non-invasive and thus it is comfortable to patients. In addition, while the optical endoscopy enables observers to examine the hollow structures in the direction that the camera moves, the v...

Recently the Ontology Mapping Problem (OMP) has been identified as a key factor towards the success of the Semantic Web and related applications. This problem arises since it is possible for different people to give, through ontologies, different conceptualizations of the same (or overlapping) knowledge domain. In order to tackle the OMP several algorithms have been designed. They aim at discov...