Scheduling Strategies to Improve Reliability and Fairness for Priority Based Smart Rural Contention Based Applications Over Low-Cost Wireless Mesh Backbone Networks

2016 ◽  
pp. 511-532 ◽  
Author(s):  
Sajid M. Sheikh ◽  
Riaan Wolhuter ◽  
Herman A. Engelbrecht
Keyword(s):  
Low Cost ◽  
Backbone Networks ◽  
Wireless Mesh ◽  
Scheduling Strategies ◽  
Improve Reliability

Agrinex: A low-cost wireless mesh-based smart irrigation system

Measurement ◽  
2020 ◽  
Vol 161 ◽  
pp. 107874 ◽  
Author(s):  
Nestor Michael Tiglao ◽  
Melchizedek Alipio ◽  
Jezy Verence Balanay ◽  
Eunice Saldivar ◽  
Jean Louise Tiston
Keyword(s):  
Irrigation System ◽  
Low Cost ◽  
Wireless Mesh

Evaporative Cooling of Gas Turbine Engines

2013 ◽  
Vol 135 (8) ◽  
Author(s):  
Mustapha Chaker ◽  
Cyrus B. Meher-Homji
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Low Cost ◽  
Evaporative Cooling ◽  
Turbine Engines ◽  
Gas Turbine Engines ◽  
End User ◽  
Very High ◽  
Improve Reliability ◽  
Selection Of

There are numerous gas turbine applications in power generation and mechanical drive service where power drop during the periods of high ambient temperature has a very detrimental effect on the production of power or process throughput. Several geographical locations experience very high temperatures with low coincident relative humidities. In such cases media evaporative cooling can be effectively applied as a low cost power augmentation technique. Several misconceptions exist regarding their applicability to evaporative cooling, the most prevalent being that they can only be applied in extremely dry regions. This paper provides a detailed treatment of media evaporative cooling, discussing aspects that would be of value to an end user, including selection of climatic design points, constructional features of evaporative coolers, thermodynamic aspects of its effect on gas turbines, and approaches to improve reliability. It is hoped that this paper will be of value to plant designers, engineering companies, and operating companies that are considering the use of media evaporative cooling.

Wireless mesh network data communications and reliability analysis for anti-theft application deployment in educational institutions

2019 ◽  
Vol 17 (3) ◽  
pp. 474-489
Author(s):  
Roger van Rensburg ◽  
Bruce Mellado ◽  
Cesar Augusto Marin Tobon
Keyword(s):  
South Africa ◽  
Mesh Networks ◽  
Low Cost ◽  
Mesh Network ◽  
Educational Institutions ◽  
Data Communications ◽  
Wireless Technology ◽  
Content Type ◽  
Wireless Mesh

Purpose The purpose of this study is to locally develop low-cost wireless mesh networks for reliable data communications to devices that prevent the theft of these devices in learning institutions of South Africa. Design/methodology/approach A network test-bench was developed where millions of packets were transmitted and logged between interconnected nodes to analyze the quality of the network’s service in a harsh indoor building environment. Similar methodologies in “big data” analysis as found in particle physics were adopted to analyze the network’s performance and reliability. Findings The results from statistical analysis reveal the quality of service between multiple asynchronous transmitting nodes in the network and compared with the wireless technology routing protocol to assess coverage in large geographical areas. The mesh network provides stable data communications between nodes with the exception of reliability degradation in some multi-hopping routes. Conclusions are presented to determine whether the underlining mesh network technology will be deployed to protect devices against theft in educational institutions of South Africa. Research limitations/implications The anti-theft application will focus on proprietary firmware development with a reputable tablet manufacturer to render the device inoperable. Data communications of devices to the network will be monitored and controlled from a central management system. The electronics embedding the system-on-chip will be redesigned and developed using the guidelines stipulated by the chip manufacturer. Originality/value Design and development of low-cost wireless mesh networks to protect tablets against theft in institutions of digitized learning. The work presents performance and reliability metrics of a low-power wireless mesh wireless technology developed in a harsh indoor building environment.

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