This paper incorporates the structural characteristics of chrysanthemums in nature and fractal geometry theory into antenna structure design a novel-structured multiband microstrip with chrysanthemum petal is proposed. The can cover commercial frequency bands from second to fourth generation (4G), satellite navigation, wireless local area networks, Bluetooth. radiator imitates chrysanthemum’s p...

abstract: A prototype of Proximity Focussing Ring Imaging Cherenkov counter has been built and tested with several radiator materials using separately cosmic-ray particles and 12 C beam fragmentation products at several energies. Counter prototype and experimental setup are described, and the results of measurements reported and compared with simulation results. The performances are discussed i...

The cutaneous lesion of erythema ab Igne are characterized by a reticulate erythema, hyperpigmentation, fine scaling, epidermal atrophy and telangiectasias, and reticulated erythema. We report a case of erythema ab igne on the hands of a 8-year-old girl, induced by classic homemade radiator.

In 1946, John D. Kraus invented the helical-beam antenna (or axialmode helix).1 Commencing with Kraus’s correct hypothesis that travelling-wave structures then used in electromagnetic devices would make efficient antennas, the helix antenna has proven to be the radiator of choice for many radio astronomy and spacescience applications. The helical antenna has been carried to the Moon and Mars, a...

We report on test results of a novel ring imaging Cherenkov (RICH) detection system consisting of a 3 meter long gaseous C4F8O radiator, a focusing mirror, and a photon detector array based on Hamamatsu multi-anode photomultiplier tubes. This system was developed to identify charged particles in the momentum range from 3-70 GeV/c for the BTeV experiment. PACS numbers: 03.30+p, 07.85YK

As a result of isolating doors and windows very well to reduce heating energy costs, some environments' air change rate becomes zero. Two different systems (radiator floor systems) widely used in residential applications were compared for room where the is zero, using numerical methods terms particle concentrations. 3D dimensional CFD simulations show that system performs better removing pollut...

In many industrial processes, heat exchangers play the important role of the cooling function. The effective heat transfer rate in a specific process strongly depends on the heat exchanger design. The most popular type of heat exchangers commonly used in the automotive industry, is called "radiator". In engines, radiators play the important role of the cooling process. The present study is de...

At the University of Twente, a 14.5 K hydrogen-based sorption cooler is under development. It can be used as a stand-alone 14.5 K cooler, or as a precooler, e.g., in combination with a 4 K heliumbased sorption cooler. The advantage of sorption coolers is the absence of moving parts and, as a result, their vibration-free operation and, potentially, a very long life. A 4.5 K helium-based sorption...

A feasibility study is presented exploring the possibility of using thermoelectric devices for thermal control CubeSat on-board electronics. simple architecture devised and an empirical model how such a system would perform constructed, performance data commercially available module. This used to calculate temperature which could cool computer chip, as function resistance heat rejection. As bas...