A vehicular ad hoc network (VANET) is a wirelessly connected of nodes. number techniques, such as message ferrying, data aggregation, and node clustering aim to improve communication efficiency in VANETs. Cluster heads (CHs), selected the process clustering, manage inter-cluster intra-cluster communication. The lifetime clusters CHs determines network. In this paper Clustering algorithm based on Ant Colony Optimization (ACO) for VANETs (CACONET) proposed. CACONET forms optimized robust...

In this study, an ultra–miniaturized implantable antenna based system with ultra-wideband characteristics in the industrial, scientific, and medical band (i.e., 2.4–2.48 GHz) is proposed for biomedical applications. A biocompatible flexible liquid crystalline polymer material, Rogers ULTRALAM (tan <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\delta =0.0025$ </tex-math></inline-formula>...

This study presents a multi-band conformal antenna based endoscopic system for robust biotelemetry communications, which covers five important bands, including the MedRadio (401–406 MHz), Industrial, Scientific, and Medical (ISM) (433.1–434.8 MHz, 868–868.6 902–928 midfield (1200 MHz) bands. These bands are intended functions such as biotelemetry, power saving, wireless transfer (WPT). The proposed is printed on flexible material Rogers ULTRALAM with thickness of only 0.1 mm, can be easily...

A novel, cedar-shaped, coplanar waveguide-fed frequency reconfigurable antenna is proposed. The presented uses low-cost FR4 substrate with a thickness of 1.6 mm. Four PIN diodes are inserted on the surface to variate current distribution and alter resonant frequencies different combinations switches. proposed fabricated measured for all states, good agreement seen between simulated results. This resonates within range 2 GHz 10 GHz, covering major wireless applications aviation service, local...

A small antenna system plays a vital role in wireless communication and monitoring of key-signs through information collected by implantable devices. Therefore, this study presents an ultra-miniaturized for deeply medical implants, operating at 2.45 GHz industrial, scientific, (ISM) band. To achieve miniaturized geometry, slotted ground plane patch, thin substrate, superstrate are used. liquid crystalline polymer material (Rogers ULTRALAM; tan <inline-formula...

A compact, flexible 24-b dual-polarized chipless radio frequency identification tag with a size of 20.6mm × 19.9mm is realized. The structure optimized and analyzed for Taconic, Kapton TIN organic substrate. prototype fabricated on TIP photopaper silver nanoparticles-based conductive ink exhibiting behavior moisture sensor. proposed sensor has bandwidth 13.5GTIz. direct printability makes it suitable intelligent packaging various low-cost applications.

Technological advancements in medical care have necessitated the development of efficient and miniaturized implantable devices. This paper presents an ultra-wide-band antenna for use scalp-based biomedical applications covering industrial, scientific, (ISM) (2.4&#x2013;2.48 GHz) band. The proposed is mounted on a 0.1&#x2013;mm thick liquid crystalline polymer (LCP) Roger ULTRALAM (tan&#x03B4; = 0.0025 &#x03B5;_r 2.9), serving as dielectric material both superstrate substrate...

With recent advancements of technologies such as Internet Things and cloud computing, security information systems has emerged a critical issue. This created need for elicitation analysis the requirements at an early stage system development. These should also be expressed using visual notations that can encapsulate vision different stakeholders related to security. While business process management notation (version 2.0.2) is widely used graphical representation makes it easier define...

Free space optical (FSO) systems offer a desirable and affordable way of providing communication services in remote locations. They provide secure wireless transmission without the requirement for licensing with lower implementation costs. However, due to impact atmospheric turbulences on effectiveness FSO systems, their faces significant challenges. Dense wavelength division multiplexing (DWDM) has shown promise addressing growing bandwidth needs networks. This paper introduces hybrid...

A compact chipless RFID tag with robust readable features is presented in this paper.The made up of novel concentric butterfly slot resonators.Bit data encoded the frequency signature tag.Each corresponds to a resonance peak representing bit '1', whereas an absence signifies '0'.Proposed resonator design demonstrates insensitivity different polarization and incident angles linearly polarized impinging electromagnetic wave.The operates band 4.7-9.7 GHz, limited within license-free ultra...

In this paper, we analyze the impact of buffer-aided full-duplex successive relay selection schemes with energy harvesting capability nodes in amplifying and forward (AF) decode (DF) relaying environments for Internet Things networks. We propose to select a pair based on harvested signal strength at destination receive transmit same time slot, respectively. Contrary previous which are only cause overuse problem, proposed scheme ensures balanced use nodes. The is implemented switching (TS)...

A miniaturized, polarization insensitive, and fully passive chipless radio frequency identification tag is proposed in this research article. The realized based on slotted elliptical structures a nested loop fashion with identical lengths widths of slot resonators. Alteration data sequence accomplished by addition elimination resonators the geometric structure. capable to encode 10 bits covers spectral range from 3.6 15.6 GHz. formulated structure demonstrates insensitive characteristic....

A compact 16-bit chipless RFID moisture sensor tag with a size of 13.2 × 19.6 mm2 is designed, fabricated and analyzed. The presented realized on paper substrate silver nano particle based ink patches as conducting material. frequency band operation 0.5 to 14 GHz having an overall bandwidth 13.5 GHz. It loaded slots different lengths widths, etched the conductive exhibits stable sensing characteristic towards in real environment. flexible, sensitive environmental friendly nature proposed...

Insider threats detection problem has always been one of the most difficult challenges for organizations and research community. Effective behavioral categorization users plays a vital role success any mechanisms. It also helps to reduce false alarms in case insider threats. In order achieve this, fuzzy classifier implemented along with genetic algorithm (GA) enhance efficiency classifier. enhances functionality all other modules better results terms alarms. A scenario driven approach...

Cryptographic hash functions had been very significant primitives to the cryptography. They have utilized widely in cryptographic applications and most important of them is their use composition efficient Message Authentication Codes (MACs). The cryptanalysis hashing algorithms used Hash Code(HMAC) like SHA-1 MD5 found many attacks against them. But this does not mean that if underlying are breakable then HMAC also breakable. It infeasible for attacker break because he would be able generate...

A novel, frequency selective surface (FSS) based, data encoding structure amenable to be used as a chipless RFID tag is proposed. The made up of finite repetitions unit cell fabricated on commercially available grounded FR4 substrate having physical dimensions 15 × mm2. composed numerous T-shaped resonant elements arranged two atypical sets concentric nested loops. Alteration in geometry the circuit, attained by inclusion or omission resonators, corresponds particular sequence. Each encoded...