THE SOLUTION of the radiative heat transfer problem in porous media has received considerable attention for a number of years (e.g.. Vortmeyer [I], Tien and Drolen [2], ’ nd Kaviany and Singh [3]). The medium may be considere d as a continuum or as a discrete collection of particles, depending on whether the packing lies in the dependent or independent scattering/absorption range. Independent s...

An infrared (IR) transcutaneous remote control was designed for use in the totally implantable middle ear system. Considering the IR reflection, absorption and scattering effect of the skin, the required IR radiant intensity is calculated. After we have implemented the designed control, the transcutaneous operation experiment was carried out using a porcine skin. key words: implantable middle e...

Now that there is a general concession that good work is being done by some or all of the different forms of radiant energy, it may be as well to enquire whether we may be able to detect any theory upon which we may work, and thus remove, if possible, these novel forms of treatment from the limits of absolute ?empiricism.

Many countries use liquefied petroleum gas (LPG) for various purposes, such as cooking and heating. As the population need energy grow, demand LPG steadily increases. This situation causes rise in imports with an insufficient local supply, including Indonesia. To overcome this problem, Indonesian Government plans to substitute fuel dimethyl ether (DME). However, stoves household burners widely ...