The sensor network is a wireless network environment that consists of the many sensors of lightweight and low-power. Authentication between nodes is very vital for network reliability and the integrity of information collected by these nodes. Therefore, encryption algorithm for the implementation of reliable sensor network environments is required to the applicable sensor network. This paper gi...

Asymmetric rotators with a 1,4-bis(ethynyl)bicyclo[2.2.2]octane (BCO) core are needed for engineering crystalline arrays of functional molecular rotors. Their synthesis uses carbinol, 2-methyl-3-butyn-2-ol, as a protecting group because of its polar character and its ability to sustain orthogonal functionalization with the further advantage of being readily removed. The synthesis in good yields...

To improve efficiency of fuel cells working on the proton exchange membrane principle, which are currently being developed for automotive applications, a supply of pressurized air at about 3 bars abs is required. This is expelled in the reaction products, mainly as water and nitrogen, at approximately 100C. The power input required to compress the air consumes approximately 20% of the cell elec...

BACKGROUND Phase analysis of cardiac arrhythmias, particularly atrial fibrillation, has gained interest because of the ability to detect organized stable drivers (rotors) and target them for therapy. However, the lack of methodology details in publications on the topic has resulted in ongoing debate over the phase mapping technique. By comparing phase maps and activation maps, we examined advan...

Background: It has been hypothesized that stable mother rotors may increase the stability of atrial fibrillation. Local shortening of action potential duration due to vagotonic activity may promote the formation of mother rotors. However, prior studies have shown that meandering rotors typically drift out of the region of short action potential duration (APD), making the formation of stable rot...

A time-spectral and adjoint-based optimization procedure that is particularly efficient for the analysis and shape design of helicopter rotors is developed. The time-spectral method is a fast and accurate algorithm to simulate periodic, unsteady flows by transforming them to a steady-state analysis using a Fourier spectral derivative temporal operator. An accompanying steady-state adjoint formu...

Abstract Renewable Energy Sources (RES) is the spearhead of current global energy and technological market. However, RES has been part our everyday life for many decades. Hydroelectric energy, prime RES’s, had a pioneer presence at non-interconnected island Crete, where Small Power Plant (SHPP) Agia ceased its operation after eighty years service. Subsequently, owner plant decided to grant perm...

Since screw compressor rotors are of a helical shape and tool points engaged in their manufacturing pass different cutting length, the tools do not wear uniformly along the rotor profiles. The nonuniformity depends on a difference between the rotor point angle and pressure angle and on the rotor helix angle. A difference in relative movement between the tool and the rotors with and without the ...

A compact, flow-through centrifugation system has been developed specifically for high-throughput centrifugation of large numbers of samples. The instrument is based on multiple high-speed rotors that also serve as sample holders. The small size of the rotors allows them to be arrayed in a standard 96-well microtiter plate spacing, making this device ideal for highly parallel automated instrume...