Intrusion Detection Systems Based on Artificial Intelligence Techniques in Wireless Sensor Networks

[EN] Intrusion detection system (IDS) is regarded as the second line of defense against network anomalies and threats. IDS plays an important role in network security. There are many techniques which are used to design IDSs for specific scenario and applications. Artificial intelligence techniques are widely used for threats detection. This paper presents a critical study on genetic algorithm, artificial immune, and artificial neural network (ANN) based IDSs techniques used in wireless sensor network (WSN)The authors extend their appreciation to the Distinguished Scientist Fellowship Program(DSFP) at King Saud University for funding this research.Alrajeh, NA.; Lloret, J. (2013). Intrusion Detection Systems Based on Artificial Intelligence Techniques in Wireless Sensor Networks. International Journal of Distributed Sensor Networks. 2013(351047):1-6. https://doi.org/10.1155/2013/351047S16201335104

Thermal transformations of Cu–Mg (Zn)–Al(Fe) hydrotalcite-like materials into metal oxide systems and their catalytic activity in selective oxidation of ammonia to dinitrogen

Layered double hydroxides (LDHs) containing $Mg^{2+}$, $Cu^{2+}$ or $Zn^{2+}$ cations in the $Me^{II}$ positions and $Al^{3+}$ and $Fe^{3+}$ in the $Me^{III}$ positions were synthesized by co- precipitation method. Detailed studies of thermal trans- formation of obtained LDHs into metal oxide systems were performed using high temperature X-ray diffraction in oxidising and reducing atmosphere, thermogravimetry coupled with mass spectrometry and temperature-pro- grammed reduction. The LDH samples calcined at 600 and 900 $^{o}\textrm{C}$ were tested in the role of catalysts for selective oxidation of ammonia into nitrogen and water vapour. It was shown that all copper congaing samples presented high catalytic activity and additionally, for the Cu–Mg–Al and Cu–Mg–Fe hydrotalcite samples calcined at 600 $^{o}\textrm{C}$ rela- tively high stability and selectivity to dinitrogen was obtained. An increase in calcination temperature to 900 $^{o}\textrm{C}$ resulted in a decrease of their catalytic activity, possibly due to formation of well-crystallised metal oxide phase which are less catalytically active in the process of selective oxidation of ammonia

A Domino Radical Amidation/Semipinacol Approach to All-Carbon Quaternary Centers Bearing an Aminomethyl Group

A photoredox-mediated radical amidation ring-expansion sequence that enables the generation of all-carbon quaternary centers bearing a protected aminomethyl substituent is described. The methodology can be applied to both styrene and unactivated alkene substrates generating structurally diverse sp3-rich amine derivatives in a concise manner

MoS₂ and MoSe₂ 2D nanosheets-based supramolecular nanostructure scaffold-capped Ag-NPs: exploring their morphological, anti-bacterial, and anticancer properties

Different nanostructural composites-capped silver nanoparticles (i.e., Ag-NPs@SHGel-MoX2, where X = S, Se) were explored. Nanocomposites comprising a two-dimensional (2D) metal dichalcogenides (i.e., MoS2, MoSe2, and MoS2–MoSe2) nanosheets-dispersed supramolecular hydrogel (SHGel) structure were used as stabilizing agents of silver nanoparticles synthesized through direct exposure to sunlight without use of external reducing chemicals under atmospheric conditions. The morphological uniqueness of individual nanocomposite-capped Ag-NPs was observed by transmission electron microscopy (TEM). Electron-dispersive X-ray spectroscopy associated with TEM revealed elemental-level confirmation of formation of Ag-NPs@SHGel-MoX2 with distinct nano-stabilizing agents composed of 2D nanosheets of MoS2-, MoSe2-, and combined MoS2–MoSe2-dispersed gel-nanocomposites. X-ray photoelectron spectroscopy of these composite-capped Ag-NPs was undertaken. The bioactivity of three diverse Ag-NPs (i.e., Ag-NPs@SHGel-MoS2, Ag-NPs@SHGel-MoSe2, and Ag-NPs@SHGel-MoS2–MoSe2) was surveyed. The antibacterial properties of three Ag-NPs@SHGel-MoX2 were experimentally tested employing Gram-positive Bacillus subtilis and Gram-negative Klebsiella pneumoniae. The anticancer activity of Ag-NPs@SHGel-MoS2, Ag-NPs@SHGel-MoSe2, and Ag-NPs@SHGel-MoS2–MoSe2 against the human adenocarcinomic alveolar cell line (A549) was also revealed