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Since one of the main reasons for improvement network lifetime is communications reduction in collecting vital signs and transmit them to the coordinator. In this paper, it is tried to reduce communications through adaption the sampling rate through individual's discovered pattern, activity prediction and watchdog biosensor. The first, the daily behavior pattern of the individual is identified, then the individual's activities are predicted; if the predicted activity exists in the individual's behavioral pattern, all the sensors are activated to read information with maximum sampling rate. Otherwise, the sensors read information with the minimum sampling rate and the watchdog biosensor is activated to sense and send the vital signs with the maximum sampling rate. The simulation results show that the proposed method improves network traffic by 80% and decreases the energy consumption of the network by four times. [ABSTRACT FROM AUTHOR]

Considering the importance of biosensors on the Internet of the patient body that collect vital signs and transmit them to the coordinator, energy consumption and network lifetime are essential challenges in these networks. This paper, it has been tried to present a method based on adapting sampling rate through patient's risk and discovered pattern by employing an intelligence method based on adaptive neuro-fuzzy inference system, interpolation function, and a biosensor patron. It causes restricting sensed and transmitted data to the coordinator. In the proposed schema, three methods containing Grid partitioning, Subtractive Clustering and fuzzy c-means have been used in two modes, including hybrid and error backpropagation, to predict the individual's behavioral pattern and determine the patient's risk, attentively. The simulation results in MATLAB R2018b show that the proposed method reduces the network communications. It has improved energy consumption by up to three times and also reduced traffic by more than 80% compared to similar methods. [ABSTRACT FROM AUTHOR]

In this paper the physical properties of silver oxide thin film have been prepared on BK7 substrate at room temperature by reactive DC magnetron sputtering technique using pure silver metal target by varying oxygen partial pressure during growth at reported. The reactive sputter gas was a mixture of Ar (99.999%) and N (99.999%) with the different ratio Ar and N by volume at the constant pressure of the growth chamber. The X-ray diffraction measurements showed that by increasing O volume during the Growth, change in crystalline structure will occur. The Atomic Force Microscope images shown by increasing O volume, the RMS roughness decreasing consistently. The thickness of the thin films decreases (from 353 to 230 nm) with increasing oxygen partial pressure in chamber. The reflectivity of thin films was investigated with a spectrophotometer system, and the surface reflectivity measurements indicate that by increasing O volume growth, the optical properties of the films changes. [ABSTRACT FROM AUTHOR]

Silver oxide nano layers were prepared by RF magnetron sputtering on amorphous SiO2 substrates. O2 pressure in chamber was varied from 1 to 4 and 7 mTorr during growth process. The effects of different O2 pressure on structural, morphological and optical properties of the films were investigated by means of X-ray diffraction, scanning electron microscopy, atomic force microscopy and UV-Vis spectroscopy analyses. Optical reflectance measured in the wavelength of 350-950 nm by spectroscopy. Other optical properties and optical band gaps were calculated using Kramers-Kronig relations. The X-ray diffraction measurements showed change in crystalline structure with increasing O2 pressure. Preferred orientation has been changed to another growth orientation at 4 mTorr O2 pressure. The Atomic force microscope images showed increasing in roughness consistently by increasing oxygen pressure. The thickness of the thin films decreases (from 217 to 180 nm) with increasing O2 pressure. Optical results revealed that the highest optical band gap of 3.1 eV and the highest transmittance of ~ 80% were achieved at lower O2 pressure (1 mTorr). [ABSTRACT FROM AUTHOR]