a novel zr,ce-tio2/sio2 nanocomposite thin film was successfully prepared with various amounts of zr4+ and ce4+ as codopant ions for self-cleaning applications. a thin film was coated on a tile substrate by dip-coating and porous zr,ce-tio2/sio2 was obtained after heat treatment for 2 hours at 500 °c. the sem images and xrd pattern showed that the optimum amount of doping ions in relation to ti...

High surface area alumina coatings were prepared on surface acoustic wave (SAW) mass balances. These coatings were fabricated by anodic etching of evaporated aluminum films. The coatings consisted of roughly collinear pores penetrating through the monolithic alumina film. The nanoporous (NP) coatings were characterized by scanning electron microscopy, and the pore number density and diameter we...

The diesel / gasoline engine rejects about two thirds of the heat energy of the fuel, one-third to the coolant, and one third to the exhaust, leaving only about one-third as useful power output. Theoretically if the heat rejected could be reduced, then the thermal efficiency would be improved, at least up to the limit set by the second law of thermodynamics. Low Heat Rejection (LHR) engines aim...

A thermal control architecture design study is conducted for a novel robotic planetary and lunar surface exploration concept. The concept is based on the deployment of a large number of small spherical mobile robots over large areas, which employ hopping, bouncing and rolling as means of locomotion. The aim of the research is to prevent freezing and overheating of the robots, without compromisi...

Titanium (Ti) has been widely used in clinical applications for its excellent biocompatibility and mechanical properties. However, the bioinertness of the surface of Ti has motivated researchers to improve the physicochemical and biological properties of the implants through various surface modifications, such as coatings. For this purpose, we prepared a novel bioactive material, a lanthanum-in...

J.M. Gonzalez, M. Navarro, C. Puente, J. Romeu and A. Aguasca Measurements: To verify the active region scalability predicted by the numerical simulations, an electromagnetic-field measurementtechnique based on infra-red thermograms was used. 'Infra-red thermography is a technique based on the measurement of the transformation into heat of energy absorbed by a lossy material when an electromagn...

introduction:deep fat frying is a cooking method where oil is used as the heat transfer medium, in direct contact with food at a temperature above boiling point of water. the aim of this process is to combine short cooking times with unique characteristics. it also involves heat and mass transfer simultaneously. during frying time, the mass transfer is characterized by the dynamics moisture los...

Precision assembly of hybrid micro systems requires not only a high precision handling and adjusting of the parts but also a highly accurate and fast bonding technique. In this field adhesive technology is one of the major joining techniques. At the Collaboration Research Center 516, a batch process based on a joining technique using hot melt adhesives was developed. This technique allows the c...

[1] This paper addresses the atmospheric and oceanic causes of the seasonal cycle of sea surface temperature (SST) in the tropical Atlantic on the basis of direct observations. Data sets include up to 4 years (September 1997 to February 2002) of measurements from moored buoys of the Pilot Research Array in the Tropical Atlantic (PIRATA), near-surface drifting buoys, and a blended satellite in s...