A Fuzzy-Based Context-Aware Misbehavior Detecting Scheme for Detecting Rogue Nodes in Vehicular Ad Hoc Network

A vehicular ad hoc network (VANET) is an emerging technology that improves road safety, traffic efficiency, and passenger comfort. VANETs’ applications rely on co-operativeness among vehicles by periodically sharing their context information, such as position speed and acceleration, among others, at a high rate due to high vehicles mobility. However, rogue nodes, which exploit the co-operativeness feature and share false messages, can disrupt the fundamental operations of any potential application and cause the loss of people’s lives and properties. Unfortunately, most of the current solutions cannot effectively detect rogue nodes due to the continuous context change and the inconsideration of dynamic data uncertainty during the identification. Although there are few context-aware solutions proposed for VANET, most of these solutions are data-centric. A vehicle is considered malicious if it shares false or inaccurate messages. Such a rule is fuzzy and not consistently accurate due to the dynamic uncertainty of the vehicular context, which leads to a poor detection rate. To this end, this study proposed a fuzzy-based context-aware detection model to improve the overall detection performance. A fuzzy inference system is constructed to evaluate the vehicles based on their generated information. The output of the proposed fuzzy inference system is used to build a dynamic context reference based on the proposed fuzzy inference system. Vehicles are classified into either honest or rogue nodes based on the deviation of their evaluation scores calculated using the proposed fuzzy inference system from the context reference. Extensive experiments were carried out to evaluate the proposed model. Results show that the proposed model outperforms the state-of-the-art models. It achieves a 7.88% improvement in the overall performance, while a 16.46% improvement is attained for detection rate compared to the state-of-the-art model. The proposed model can be used to evict the rogue nodes, and thus improve the safety and traffic efficiency of crewed or uncrewed vehicles designed for different environments, land, naval, or air

Micromechanical Properties of Injection-Molded Starch–Wood Particle Composites

The micromechanical properties of injection molded starch–wood particle composites were investigated as a function of particle content and humidity conditions. The composite materials were characterized by scanning electron microscopy and X-ray diffraction methods. The microhardness of the composites was shown to increase notably with the concentration of the wood particles. In addition,creep behavior under the indenter and temperature dependence were evaluated in terms of the independent contribution of the starch matrix and the wood microparticles to the hardness value. The influence of drying time on the density and weight uptake of the injection-molded composites was highlighted. The results revealed the role of the mechanism of water evaporation, showing that the dependence of water uptake and temperature was greater for the starch–wood composites than for the pure starch sample. Experiments performed during the drying process at 70°C indicated that the wood in the starch composites did not prevent water loss from the samples.Peer reviewe

Uterine and tubal abnormalities in infertile Saudi Arabian women: A teaching hospital experience

Background and Objective: Hysterosalpingography (HSG) is commonly used in the evaluation of the subfertile and infertile women. This study was undertaken to assimilate the findings observed during HSG in Saudi Arabian infertile patients and to find the most common pathology identified by the HSG. Patients and Methods: A retrospective analysis was conducted of subfertile and infertile patients who had undergone HSG between June 2007 and May 2012. Patients′ demographic data were collected from the medical records of the King Fahd Hospital of the University, Al Khobar, Saudi Arabia. The data included age, years of marriage, menstrual history either regular or irregular, primary/secondary infertility, hormonal profile, previous infection or pelvic surgery, and diagnostic laparoscopy. Radiographic reports of HSG were collected from the IPAC system and analyzed for fimbrial findings, tubal patency, and cervical and uterine cavitary pathology. The data were entered in the database and analyzed using a t-test to compare means between the age, type of infertility, different pathologies and for all the parameters assessed. All tests were performed using Statistical Package for the Social Sciences, version 14.0, Chicago, Illinois, USA. A P < 0.05 was considered statistically significant with a confidence interval of 95%. Results: Data from the medical records of 117 patients with an average age of 32.59 ± 5.48 years were analyzed. Of this total, 48 (41%) had been diagnosed as having primary infertility. In 95 (81.2%) patients, there was an abnormality in the fallopian tubes and in 27 (23%) patients, there was an abnormality in the uterus. Patients with primary infertility were significantly younger (29.7 ± 5.6 vs. 34.58 ± 4.75; P < 0.001), and tubal and uterine pathology was more common (P < 0.08 and 0.01). Conclusions: Our review indicates that the most common pathology found through HSG in women presenting with infertility is tubal blockage

Synthesis of Pyrazole-Thiobarbituric Acid Derivatives: Antimicrobial Activity and Docking Studies

A one-pot reaction was described that results in various pyrazole-thiobarbituric acid derivatives as new pharmacophore agents. These new heterocycles were synthesized in high yields with a broad substrate scope under mild reaction conditions in water mediated by NHEt2. The molecular structures of the synthesized compounds were assigned based on different spectroscopic techniques. The new compounds were evaluated for their antibacterial and antifungal activity. Compounds 4h and 4l were the most active compounds against C. albicans with MIC = 4 µg/L. Compound 4c exhibited the best activity against S. aureus and E. faecalis with MIC = 16 µg/L. However, compounds 4l and 4o were the most active against B. subtilis with MIC = 16 µg/L. Molecular docking studies for the final compounds and standard drugs were performed using the OpenEye program