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26 articles for “Propagation environment”
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Research ArticleOpen accessIn the keywordsQuality Measurements on the Radio Interface of the Mobile Communication in the Proximity of the Power SystemSaid Ghnimi, Adnen Rajhi, Ali Gharsallah, Fakhreddine KhlifaProblem statement: The electric power lines and its associated equipments generally produce an electromagnetic noise in their environment, which are likely to have dangerous effects on propagation environment to the Global System for Mobile communication (GSM) cellular mobile network. Approach: In this study, we analyzed the characteristics of the power line noise and its correlation with the GSM burst; showing … …American Journal of Applied Sciences, Vol. 8, Issue 5 · 26 Mar 2015 · 7,000 accessesView PDFCite
Research ArticleOpen accessIn the abstractEcological Situation of Poplar Species in the Aral Sea Region of KazakhstanBaikenzheyeva Ainur, Kurmanbayev Rakhat, Toktaganova Gulzhas et al.The study was conducted in response to the deteriorating environmental conditions in the Aral Sea region of Kazakhstan, characterized by the degradation of natural ecosystems, loss of biodiversity, and the disappearance of valuable tree species. Of particular importance is the investigation of the current status of populations of Populus pruinosa Schrenk and Populus diversifolia Schrenk, relic tree species of the … …OnLine Journal of Biological Sciences, Vol. 26, Issue 4 · 30 Sep 2026 · 574 accessesView PDFCite
Research ArticleOpen accessIn the abstractCollection and Processing of Medicinal Raw Materials from Some Rare Plants in the Forest-Steppe Zone of Northern KazakhstanMarat Tynykulov, Svetlana Derbush, Marina Kuznetsova et al.Rare endemic plants of the forest-steppe zone of Northern Kazakhstan, including Adonis vernalis, Adonis wolgensis, Pulsatilla patens, and Pulsatilla multifida, represent valuable medicinal resources whose sustainable utilization requires optimized harvesting, processing, and conservation strategies. This study evaluated the effects of drying conditions, environmental factors, extraction techniques, and biotechnological approaches on the yield and quality of bioactive compounds from these species. … …OnLine Journal of Biological Sciences, Vol. 26, Issue 1 · 1 Apr 2026 · 1,595 accessesView PDFCite
Research ArticleOpen accessIn the abstractA Low-Cost Vehicular Infrastructure of Monitoring and Communicating Information for Intelligent Transport SystemsDaniel Rodrigues, Jessica Nayara Severino, Andre Luis Cristiani et al.Currently, vehicles have a very large range of sensors and actuators, capable of not only sensing the condition of vehicles but also the environment around them. The information from these sensors can be used for various services in which they can bring greater comfort, safety and entertainment to the passengers and conductors of the vehicle. However, the great challenge lies … …Journal of Computer Science, Vol. 15, Issue 7 · 5 Jul 2019 · 7,719 accessesView PDFCite
Research ArticleOpen accessIn the abstractEnvironmental Impact Assessment of Quarrying Plants: An IRF Kriging Solution to Noise and Airborne Dust MonitoringDario Lippiello, Guido Alfaro Degan, Mario PinzariA geostatistical approach is tested for the assessment of the environmental impact generated by industrial plants on the surrounding areas. To this end, a case study of a tuff quarry in the Italian region of Lazio is presented. The method utilised is Intrinsic Kriging with external drift which allows spatial maps of different hazardous agents like noise and airborne dust … …American Journal of Environmental Sciences, Vol. 15, Issue 1 · 9 Feb 2019 · 7,885 accessesView PDFCite
Research ArticleOpen accessIn the abstractEvaluation of the Impact of Obstacles on the Capacity of a LTE Network in Urban Area in the UplinkAkohoule Alex, Konate Adama, Brou Pacôme, Asseu OlivierPower control is a major issue in the deployment of 4G mobile networks. Indeed, environmental constraints (relief, Air, noise,...) affect the propagation channels of mobile network systems. The new multimedia services, which consume large amounts of radio resources (frequencies), then lead to an optimization of power control in the cellular coverage in the uplink direction. The aim is to optimize … …American Journal of Engineering and Applied Sciences, Vol. 12, Issue 1 · 17 Jan 2019 · 8,295 accessesView PDFCite
Review ArticleOpen accessIn the abstractThe European Wild Boar (Sus scrofa) as a Reservoir of Tuberculosis: Ecological Drivers and Management ImplicationsGiovanna Liguori, Renato Lombardi, Fabio Castagna et al.Bovine tuberculosis (bTB), an infectious disease primarily caused by Mycobacterium bovis and other members of the Mycobacterium tuberculosis complex, represents a significant challenge to both animal and public health. Despite successful control programs in numerous regions, the presence of wildlife reservoirs, notably wild boar (Sus scrofa), impedes complete eradication and sustains disease propagation. bTB prevalence varies across Europe, with higher … …American Journal of Animal and Veterinary Sciences, Vol. 20, Issue 3 · 16 Nov 2025 · 2,621 accessesView PDFCite
Research ArticleOpen accessIn the abstractAn Evolution Framework for Evaluating Intelligent Spectrum Sensing Mechanisms in Cognitive RadioArchana Krishnamuthy, Sudhindra Kumbhashi RajgopalCognitive radio technology has advanced to address the challenge of limited spectrum availability by employing spectrum sensing techniques. This process is framed as a detection problem involving two core hypotheses: Hypo-0 and Hypo-1. Hypo-0 represents the scenario where only noise is present, and its modeling depends on parameters such as the number of observed samples, the timing of signal acquisition, … …Journal of Computer Science, Vol. 21, Issue 8 · 4 Sep 2025 · 5,807 accessesView PDFCite
Research ArticleOpen accessIn the abstractImpact of the Smart City Architecture, Speed and Traffic Density of Vehicles on the Performances of VanetsAbdallah Rhattoy, Mohamed Lahmer, Idriss ChanaVehicular Ad-hoc Networks (VANET) is one of the emerging and actual research fields in automotive companies and Intelligent Transportation Systems (ITS) designers. In the Smart City the presence of such networks opens the way for a wide range of applications such as safety applications, mobility and connectivity for both driver and passengers to exploit the transport systems in a smoothly … …Journal of Computer Science, Vol. 13, Issue 11 · 15 Nov 2017 · 7,538 accessesView PDFCite
Research ArticleOpen accessIn the abstractPerformance Evaluation of Channel Propagation Models and Developed Model for Mobile CommunicationYahia ZakariaPropagation models represent a solidifying of mathematical equations and algorithms that are used for radio signal propagation prediction in specific regions. In this research different propagation models are analyzed and compared. These propagation models have been proposed at the operating frequency of 3.8 GHz for different transmitter antenna heights in all types of terrain. These propagation models depend on location, … …American Journal of Applied Sciences, Vol. 14, Issue 2 · 25 Feb 2017 · 8,409 accessesView PDFCite