Transpiration of trees and forest stands: short and long-term monitoring using sapflow methods

This study gives an overview on carbon fibre-reinforced polymer (CFRP) strengthening and wireless sensor network (WSN) monitoring of a 121-year-old metallic roadway bridge in Melbourne, Australia. A flat prestressed unbonded retrofit (FPUR) system was developed to apply prestressed CFRP plates to the steel cross-girders of Diamond-Creek Bridge. The bridge is subjected to daily passenger and heavy truck vehicles. Sets of laboratory tests were performed to examine the efficiency and fatigue performance of the proposed FPUR system, prior to its installation on the bridge. Furthermore, in order to demonstrate the efficiency of the proposed retrofit technique, the bridge was instrumented with different types of sensors (including strain gauges, temperature and humidity sensors), and short- and long-term measurements were performed. As for short-term measurements, the bridge was loaded by a 42.5-tonne semi-trailer before and after strengthening. For the long-term monitoring, a WSN system was used to monitor the prestress level in the CFRP reinforcements for at least one year. The CFRP plates were prestressed up to about 980 MPa (38% of the CFRP ultimate strength), which resulted in about 50% reduction in the maximum tensile stress in the bottom flanges of the strengthened I-girders. The results of the short- and long-term measurements in this study showed that the proposed FPUR system can be very effective for flexural and fatigue strengthening of such bridge girders.

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Short- and long-term monitoring of radon, thoron and carbon dioxide in soil-gas at Altos de pipe, Venezuela

Journal of Radioanalytical and Nuclear Chemistry ◽

10.1023/b:jrnc.0000027093.71133.96 ◽

2004 ◽

Vol 260 (2) ◽

pp. 255-264 ◽

Cited By ~ 4

Author(s):

J. J. LaBrecque ◽

P. R. Cordoves

Keyword(s):

Carbon Dioxide ◽

Soil Gas ◽

Short And Long Term ◽

Long Term Monitoring ◽

Term Monitoring

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Remote sensing data and field survey activities for monitoring the evolution of forest systems after coppicing and soil erosion: A case study in Sardinia (Italy)

10.5194/egusphere-egu2020-21354 ◽

2020 ◽

Author(s):

Filippo Giadrossich ◽

Antonio Ganga ◽

Sergio Campus ◽

Ilenia Murgia ◽

Irene Piredda ◽

...

Keyword(s):

Remote Sensing ◽

Soil Erosion ◽

Vegetation Indices ◽

Monitoring Network ◽

Remote Sensing Data ◽

Forest Stands ◽

Sensing Data ◽

Long Term Monitoring ◽

Term Monitoring

The practice of coppicing is debated in the literature for the risk factors associated with soil erosion. Although erosion experiments provide useful data for estimating the susceptibility to soil erosion, there are many open questions that cannot be solved in isolated experiments, but which can be assessed by activating a long-term monitoring process. In this way, it is possible to correctly frame the spatial and temporal scale of soil erosion in coppice forests.&#160;The aim of the work is to evaluate the effectiveness of the use of remote sensing data in combination with field data, for monitoring the evolution of forest stands interested by coppicing in relation to soil erosion.&#160;We have installed a long-term monitoring network for erosion estimation, while Sentinel-2C satellite data were used for the period 2016-2018. Starting from this dataset, a selection of vegetation indices was calculated and compared to the morphological and topographical parameters of the study area, as well as the above-ground data collected during field activities. Using the Canonical Correspondences Analysis (CCA) the relationships between the matrix of vegetation indices, topographic and vegetational parameters and the respective performances of this protocol have been explored in order to describe the evolution of the forest stands in the study area associated to soil losses.

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Climate change must be considered in short- and long-term monitoring and assessment

Marine Pollution Bulletin ◽

10.1016/j.marpolbul.2015.11.050 ◽

2015 ◽

Vol 101 (2) ◽

pp. 481-482 ◽

Cited By ~ 1

Author(s):

Peter M. Chapman

Keyword(s):

Climate Change ◽

Short And Long Term ◽

Long Term Monitoring ◽

Term Monitoring

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Short- and long-term monitoring of underwater sound levels in the Hudson River (New York, USA)

The Journal of the Acoustical Society of America ◽

10.1121/1.4944876 ◽

2016 ◽

Vol 139 (4) ◽

pp. 1886-1897 ◽

Cited By ~ 9

Author(s):

S. Bruce Martin ◽

Arthur N. Popper

Keyword(s):

New York ◽

Hudson River ◽

Underwater Sound ◽

Sound Levels ◽

Short And Long Term ◽

Long Term Monitoring ◽

Term Monitoring

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A Smart Mirror for Emotion Monitoring in Home Environments

Sensors ◽

10.3390/s21227453 ◽

2021 ◽

Vol 21 (22) ◽

pp. 7453

Author(s):

Simone Bianco ◽

Luigi Celona ◽

Gianluigi Ciocca ◽

Davide Marelli ◽

Paolo Napoletano ◽

...

Keyword(s):

Deep Learning ◽

Everyday Life ◽

Authentication Protocol ◽

General Purpose ◽

Home Environments ◽

Learning Technique ◽

Short And Long Term ◽

Long Term Monitoring ◽

Term Monitoring

Smart mirrors are devices that can display any kind of information and can interact with the user using touch and voice commands. Different kinds of smart mirrors exist: general purpose, medical, fashion, and other task specific ones. General purpose smart mirrors are suitable for home environments but the exiting ones offer similar, limited functionalities. In this paper, we present a general-purpose smart mirror that integrates several functionalities, standard and advanced, to support users in their everyday life. Among the advanced functionalities are the capabilities of detecting a person’s emotions, the short- and long-term monitoring and analysis of the emotions, a double authentication protocol to preserve the privacy, and the integration of Alexa Skills to extend the applications of the smart mirrors. We exploit a deep learning technique to develop most of the smart functionalities. The effectiveness of the device is demonstrated by the performances of the implemented functionalities, and the evaluation in terms of its usability with real users.

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Annual and Seasonal Changes in the Structure of Litter-Dwelling Ant Assemblages (Hymenoptera: Formicidae) in Atlantic Semideciduous Forests

Psyche A Journal of Entomology ◽

10.1155/2012/959715 ◽

2012 ◽

Vol 2012 ◽

pp. 1-12 ◽

Cited By ~ 2

Author(s):

Flávio Siqueira de Castro ◽

Alexandre Bahia Gontijo ◽

Paulo de Tarso Amorim Castro ◽

Sérvio Pontes Ribeiro

Keyword(s):

Climatic Changes ◽

Litter Layer ◽

Semideciduous Forest ◽

Species Numbers ◽

Open Forest ◽

Short And Long Term ◽

Long Term Monitoring ◽

Term Monitoring ◽

Dry And Rainy Seasons

We surveyed ant fauna in the leaf litter in an Atlantic Semideciduous forest in the State Park of Rio Doce (PERD). The work aimed to produce basic information about habitat effects on diversity, as well as about how the ant fauna in a such buffered forest habitat, as the litter layer, could respond the climate variation in a short and long term. We sampled two years in two distinct forest physiognomies, which respond to different geomorphologic backgrounds, in dry and rainy seasons. Species composition, richness and abundance of these forests were distinct. However, both forests hosted similar numbers of rare and specialized, habitat demanding species, thus suggesting both are similarly well preserved, despite distinct physiognomies. However, the lower and more open forest was, more susceptible to dry season effects, showing a steeper decline in species numbers in such season, but similar numbers in the wet seasons. The pattern varied between years, which corroborates the hypothesis of a strongly variable community in response to subtle climatic variation among years. The present results are baselines for future long term monitoring projects, and could support protocols for early warnings of global climatic changes effects on biodiversity.

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