Abdullah Alqahtani

Secure data aggregation scheme in wireless sensor networks for IoT

In this paper we present a secure data aggregation scheme in Wireless Sensor Networks for IoT. The proposed method encrypts the sensor data by our elliptic-curve based seed exchange algorithm and Hilbert-curve based data transformation. As a result, it is very difficult to trace a real value even though attackers overhear the sending data. Through our performance analysis, we show that our data aggregation scheme outperforms the existing methods in terms of energy efficiency and privacy preservation.

Estimation of Curie temperature of manganite-based materials for magnetic refrigeration application using hybrid gravitational based support vector regression

Magnetic refrigeration (MR) technology stands a good chance of replacing the conventional gas compression system (CGCS) of refrigeration due to its unique features such as high efficiency, low cost as well as being environmental friendly. Its operation involves the use of magnetocaloric effect (MCE) of a magnetic material caused by application of magnetic field. Manganite-based material demonstrates maximum MCE at its magnetic ordering temperature known as Curie temperature (TC). Consequently, manganite-based material with TC around room temperature is essentially desired for effective utilization of this technology. The TC of manganite-based materials can be adequately altered to a desired value through doping with appropriate foreign materials. In order to determine a manganite with TC around room temperature and to circumvent experimental challenges therein, this work proposes a model that can effectively estimates the TC of manganite-based material doped with different materials with the aid of suppor...

Modeling of Curie temperature of manganite for magnetic refrigeration application using manual search and hybrid gravitational-based support vector regression

Magnetic refrigeration (MR) combines many unique features such as low cost, high efficiency and environmental friendliness which make it preferred to the conventional gas compression system of refrigeration. MR employs manganite-based material due to its high magnetocaloric effect as well as tunable Curie temperature (

Reversible and Fragile Watermarking for Medical Images

{T}_{\mathrm{C}}

Laser pointers: how much does the general medical community know?

TC). For effective utilization of this technology,

Incorporation of GSA in SBLLM-based neural network for enhanced estimation of magnetic ordering temperature of manganite

{T}_{\mathrm{C}}