Tree tilt monitoring in rural and urban landscapes of Hong Kong using smart sensing technology

Unveiling Falling Urban Trees before and during Typhoon Higos (2020): Empirical Case Study of Potential Structural Failure Using Tilt Sensor

“…In conclusion, this preliminary investigation could serve as a foundation of research on the relationship between tilt angle change and quantifiable structural parameters. Based on the current dataset, the establishment of the dynamic baseline of threshold values tests works, and this allows an initial starting point to compare the tilt response of individual trees and among the species in urban forests [47]. It is highly recommended that future research of this type collects additional data to further develop a tree risk index where a holistic tilt monitoring system is vital for urban tree management that can go beyond simply identifying which trees require a safety inspection [39].…”

“…The main goal of the present study is to demonstrate: (1) the root-plate tilts before and during Typhoon Higos of two trees that failed during the typhoon; and (2) a CFD model of wind velocity to determine additional insights into two trees; and (3) investigate the correlation between tree tilt angles during Typhoon Higos and corresponding tree attributes. Further to the pilot study of Abbas et al [47], this study analyzed the variations in tilting patterns that might potentially help identify the relevant tree failure patterns to screen out the problematic trees in the early stage. This can provide valuable data for the development of future contingency plans under typhoon events to mitigate hazard exposure to humans and property, as well as assist in devising effective tree management strategies (Figure 1).…”

“…The accuracy and precision of angle measurements of roll and pitch angles reached 0.1 • and 0.01 • respectively. The encrypted information, including roll and pitch (in degrees) and air temperature, is transmitted to the cloud server via the low-power wireless communication network, namely the LoRaWAN network, and the data is stored in our local database [47]. The sensor is designed and manufactured to be durable and weather-proof and powered by a longer battery life [50].…”

“…As typhoon Higos approached, each sensor takes samples every 5 min and transmitted the resultant tilt angles that were calculated from the collected roll and pitch measurements (Figure 4) [47]. By comparing the tilt variation, the tree sway patterns under various circumstances could be interpreted as the magnitude of change in the tilt angles.…”

Designing A Smart Monitoring and Alert System for Malaria Patients Based on IoT in Burundi

“…A conception of an intelligent health support system for patient surveillance in quarantines, application of IoT based smart home healthcare for decreasing needless trouble on hospitals caused by infectious diseases, and removal and explanation of patient health information from wearable [4], incorporated, and portable sensors for medical diagnostic and treatment made by Taiwo and Absalom E. Ezugwu [23]. Recently, S. Abbas et al [24] presented a controlling system using intelligent sensing devices attached to more than 8000 trees in Hong Kong's rural-urban areas landscape. And Basker and Anand [25] gave a smart monitoring system for asthma patients.…”