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https://www.readbyqxmd.com/read/28635625/soil-moisture-content-estimation-based-on-sentinel-1-and-auxiliary-earth-observation-products-a-hydrological-approach
#1
Dimitrios D Alexakis, Filippos-Dimitrios K Mexis, Anthi-Eirini K Vozinaki, Ioannis N Daliakopoulos, Ioannis K Tsanis
A methodology for elaborating multi-temporal Sentinel-1 and Landsat 8 satellite images for estimating topsoil Soil Moisture Content (SMC) to support hydrological simulation studies is proposed. After pre-processing the remote sensing data, backscattering coefficient, Normalized Difference Vegetation Index (NDVI), thermal infrared temperature and incidence angle parameters are assessed for their potential to infer ground measurements of SMC, collected at the top 5 cm. A non-linear approach using Artificial Neural Networks (ANNs) is tested...
June 21, 2017: Sensors
https://www.readbyqxmd.com/read/28635623/compressed-sensing-reconstruction-based-on-block-sparse-bayesian-learning-in-bearing-condition-monitoring
#2
Jiedi Sun, Yang Yu, Jiangtao Wen
Remote monitoring of bearing conditions, using wireless sensor network (WSN), is a developing trend in the industrial field. In complicated industrial environments, WSN face three main constraints: low energy, less memory, and low operational capability. Conventional data-compression methods, which concentrate on data compression only, cannot overcome these limitations. Aiming at these problems, this paper proposed a compressed data acquisition and reconstruction scheme based on Compressed Sensing (CS) which is a novel signal-processing technique and applied it for bearing conditions monitoring via WSN...
June 21, 2017: Sensors
https://www.readbyqxmd.com/read/28634414/monitoring-and-analysis-of-coastal-reclamation-from-1995-2015-in-tianjin-binhai-new-area-china
#3
Wengang Chen, Dongchuan Wang, Yong Huang, Liding Chen, Lihui Zhang, Xiangwang Wei, Mengqin Sang, Feicui Wang, Jinya Liu, Bingxu Hu
Increasing coastal reclamation activities have been undertaken to solve the conflict between people and land resources, creating significant challenges for coordinating coastal reclamation, economic development and environmental protection. This paper analyzes the effects of coast reclamation on Gross Domestic Product growth and the quality of inshore seawater in the Tianjin Binhai New Area. Remote sensing and a Geographic Information System were used to extract the information of coastal reclamation. The correlation between the area of coastal reclamation, GDP growth and the quality of inshore seawater was analyzed and a decoupling elasticity model was used to explore trends in the relationship between economic development and coastal reclamation...
June 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28633379/making-sense-of-remote-monitoring-studies-in-heart-failure
#4
Neal A Chatterjee, Jagmeet P Singh
No abstract text is available yet for this article.
June 13, 2017: European Heart Journal
https://www.readbyqxmd.com/read/28632236/merraclim-a-high-resolution-global-dataset-of-remotely-sensed-bioclimatic-variables-for-ecological-modelling
#5
Greta C Vega, Luis R Pertierra, Miguel Ángel Olalla-Tárraga
Species Distribution Models (SDMs) combine information on the geographic occurrence of species with environmental layers to estimate distributional ranges and have been extensively implemented to answer a wide array of applied ecological questions. Unfortunately, most global datasets available to parameterize SDMs consist of spatially interpolated climate surfaces obtained from ground weather station data and have omitted the Antarctic continent, a landmass covering c. 20% of the Southern Hemisphere and increasingly showing biological effects of global change...
June 20, 2017: Scientific Data
https://www.readbyqxmd.com/read/28632170/current-research-in-lidar-technology-used-for-the-remote-sensing-of-atmospheric-aerosols
#6
REVIEW
Adolfo Comerón, Constantino Muñoz-Porcar, Francesc Rocadenbosch, Alejandro Rodríguez-Gómez, Michaël Sicard
Lidars are active optical remote sensing instruments with unique capabilities for atmospheric sounding. A manifold of atmospheric variables can be profiled using different types of lidar: concentration of species, wind speed, temperature, etc. Among them, measurement of the properties of aerosol particles, whose influence in many atmospheric processes is important but is still poorly stated, stands as one of the main fields of application of current lidar systems. This paper presents a review on fundamentals, technology, methodologies and state-of-the art of the lidar systems used to obtain aerosol information...
June 20, 2017: Sensors
https://www.readbyqxmd.com/read/28632156/image-mosaicking-approach-for-a-double-camera-system-in-the-gaofen2-optical-remote-sensing-satellite-based-on-the-big-virtual-camera
#7
Yufeng Cheng, Shuying Jin, Mi Wang, Ying Zhu, Zhipeng Dong
The linear array push broom imaging mode is widely used for high resolution optical satellites (HROS). Using double-cameras attached by a high-rigidity support along with push broom imaging is one method to enlarge the field of view while ensuring high resolution. High accuracy image mosaicking is the key factor of the geometrical quality of complete stitched satellite imagery. This paper proposes a high accuracy image mosaicking approach based on the big virtual camera (BVC) in the double-camera system on the GaoFen2 optical remote sensing satellite (GF2)...
June 20, 2017: Sensors
https://www.readbyqxmd.com/read/28630564/cathrob-a-highly-compact-and-versatile-remote-catheter-navigation-system
#8
Laura Cercenelli, Barbara Bortolani, Emanuela Marcelli
Several remote catheter navigation systems have been developed and are now commercially available. However, these systems typically require specialized catheters or equipment, as well as time-consuming operations for the system set-up. In this paper, we present CathROB, a highly compact and versatile robotic system for remote navigation of standard tip-steerable electrophysiology (EP) catheters. Key features of CathROB include an extremely compact design that minimizes encumbrance and time for system set-up in a standard cath lab, a force-sensing mechanism, an intuitive command interface, and functions for automatic catheter navigation and repositioning...
2017: Applied Bionics and Biomechanics
https://www.readbyqxmd.com/read/28630302/new-perspective-on-spring-vegetation-phenology-and-global-climate-change-based-on-tibetan-plateau-tree-ring-data
#9
Bao Yang, Minhui He, Vladimir Shishov, Ivan Tychkov, Eugene Vaganov, Sergio Rossi, Fredrik Charpentier Ljungqvist, Achim Bräuning, Jussi Grießinger
Phenological responses of vegetation to climate, in particular to the ongoing warming trend, have received much attention. However, divergent results from the analyses of remote sensing data have been obtained for the Tibetan Plateau (TP), the world's largest high-elevation region. This study provides a perspective on vegetation phenology shifts during 1960-2014, gained using an innovative approach based on a well-validated, process-based, tree-ring growth model that is independent of temporal changes in technical properties and image quality of remote sensing products...
June 19, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28629708/comparative-use-of-different-emission-measurement-approaches-to-determine-methane-emissions-from-a-biogas-plant
#10
Torsten Reinelt, Antonio Delre, Tanja Westerkamp, Magnus A Holmgren, Jan Liebetrau, Charlotte Scheutz
A sustainable anaerobic biowaste treatment has to mitigate methane emissions from the entire biogas production chain, but the exact quantification of these emissions remains a challenge. This study presents a comparative measurement campaign carried out with on-site and ground-based remote sensing measurement approaches conducted by six measuring teams at a Swedish biowaste treatment plant. The measured emissions showed high variations, amongst others caused by different periods of measurement performance in connection with varying operational states of the plant...
June 16, 2017: Waste Management
https://www.readbyqxmd.com/read/28629157/wuhan-ionospheric-oblique-backscattering-sounding-system-and-its-applications-a-review
#11
REVIEW
Shuzhu Shi, Guobin Yang, Chunhua Jiang, Yuannong Zhang, Zhengyu Zhao
For decades, high-frequency (HF) radar has played an important role in sensing the Earth's environment. Advances in radar technology are providing opportunities to significantly improve the performance of HF radar, and to introduce more applications. This paper presents a low-power, small-size, and multifunctional HF radar developed by the Ionospheric Laboratory of Wuhan University, referred to as the Wuhan Ionospheric Oblique Backscattering Sounding System (WIOBSS). Progress in the development of this radar is described in detail, including the basic principles of operation, the system configuration, the sounding waveforms, and the signal and data processing methods...
June 18, 2017: Sensors
https://www.readbyqxmd.com/read/28628274/new-technology-of-using-meteorological-information-in-forest-insect-pest-forecast-and-warning-systems
#12
Jiang-Lin Qin, Xiu-Hao Yang, Zhong-Wu Yang, Ji-Tong Luo, Xiu-Feng Lei
BACKGROUND: Near surface air temperature and rainfall are major weather factors affecting forest insect dynamics. The recent development in remote sensing retrieval and GIS spatial analysis techniques enable the utilization of weather factors to significantly enhance forest pest forecasting and warning systems. The current study focused on building forest pest digital data structures as a platform of correlation analysis between weather conditions and forest pest dynamics for better pest forecasting and warning systems using the new technologies...
June 19, 2017: Pest Management Science
https://www.readbyqxmd.com/read/28628140/-correlation-study-between-respiratory-death-and-airborne-particles-in-beijing-spatiotemporal-analysis-based-on-satellite-remote-sensing-data
#13
X Y Wu, G X Li, X Y Wang, F C Liang, X C Pan
OBJECTIVE: To use vertical and humidity correcting method to calibrate aerosol optical depth (AOD), and to explore the feasibility of calibrated-AOD as exposure index to measure the level of air pollutants from the ground and to establish the exposure-response relationship between calibrated-AOD and people's health outcomes. METHODS: First of all, we interpolated AOD, PM2.5, relative humidity and planetary boundary layer height using Kriging method to obtain data at different locations and matched different data with respiratory death in Beijing by geographical coordinates...
June 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/28628132/resilience-potential-of-the-ethiopian-coffee-sector-under-climate-change
#14
Justin Moat, Jenny Williams, Susana Baena, Timothy Wilkinson, Tadesse W Gole, Zeleke K Challa, Sebsebe Demissew, Aaron P Davis
Coffee farming provides livelihoods for around 15 million farmers in Ethiopia and generates a quarter of the country's export earnings. Against a backdrop of rapidly increasing temperatures and decreasing rainfall, there is an urgent need to understand the influence of climate change on coffee production. Using a modelling approach in combination with remote sensing, supported by rigorous ground-truthing, we project changes in suitability for coffee farming under various climate change scenarios, specifically by assessing the exposure of coffee farming to future climatic shifts...
June 19, 2017: Nature Plants
https://www.readbyqxmd.com/read/28624729/modis-observations-of-cyanobacterial-risks-in-a-eutrophic-lake-implications-for-long-term-safety-evaluation-in-drinking-water-source
#15
Hongtao Duan, Min Tao, Steven Arthur Loiselle, Wei Zhao, Zhigang Cao, Ronghua Ma, Xiaoxian Tang
The occurrence and related risks from cyanobacterial blooms have increased world-wide over the past 40 years. Information on the abundance and distribution of cyanobacteria is fundamental to support risk assessment and management activities. In the present study, an approach based on Empirical Orthogonal Function (EOF) analysis was used to estimate the concentrations of chlorophyll a (Chla) and the cyanobacterial biomarker pigment phycocyanin (PC) using data from the MODerate resolution Imaging Spectroradiometer (MODIS) in Lake Chaohu (China's fifth largest freshwater lake)...
June 10, 2017: Water Research
https://www.readbyqxmd.com/read/28621740/a-multi-disciplinary-approach-to-remote-sensing-through-low-cost-uavs
#16
Gabriela Calvario, Basilio Sierra, Teresa E Alarcón, Carmen Hernandez, Oscar Dalmau
The use of Unmanned Aerial Vehicles (UAVs) based on remote sensing has generated low cost monitoring, since the data can be acquired quickly and easily. This paper reports the experience related to agave crop analysis with a low cost UAV. The data were processed by traditional photogrammetric flow and data extraction techniques were applied to extract new layers and separate the agave plants from weeds and other elements of the environment. Our proposal combines elements of photogrammetry, computer vision, data mining, geomatics and computer science...
June 16, 2017: Sensors
https://www.readbyqxmd.com/read/28620400/comparing-pixel-and-object-based-approaches-to-map-an-understorey-invasive-shrub-in-tropical-mixed-forests
#17
Madhura Niphadkar, Harini Nagendra, Cristina Tarantino, Maria Adamo, Palma Blonda
The establishment of invasive alien species in varied habitats across the world is now recognized as a genuine threat to the preservation of biodiversity. Specifically, plant invasions in understory tropical forests are detrimental to the persistence of healthy ecosystems. Monitoring such invasions using Very High Resolution (VHR) satellite remote sensing has been shown to be valuable in designing management interventions for conservation of native habitats. Object-based classification methods are very helpful in identifying invasive plants in various habitats, by their inherent nature of imitating the ability of the human brain in pattern recognition...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28620399/timing-is-important-unmanned-aircraft-vs-satellite-imagery-in-plant-invasion-monitoring
#18
Jana Müllerová, Josef Brůna, Tomáš Bartaloš, Petr Dvořák, Michaela Vítková, Petr Pyšek
The rapid spread of invasive plants makes their management increasingly difficult. Remote sensing offers a means of fast and efficient monitoring, but still the optimal methodologies remain to be defined. The seasonal dynamics and spectral characteristics of the target invasive species are important factors, since, at certain time of the vegetation season (e.g., at flowering or senescing), plants are often more distinct (or more visible beneath the canopy). Our aim was to establish fast, repeatable and a cost-efficient, computer-assisted method applicable over larger areas, to reduce the costs of extensive field campaigns...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28618316/change-detection-using-landsat-images-and-an-analysis-of-the-linkages-between-the-change-and-property-tax-values-in-the-istanbul-province-of-turkey
#19
Sibel Canaz, Yeşim Aliefendioğlu, Harun Tanrıvermiş
In this study, the Istanbul Province was monitored using Landsat 5 TM, MSS, Landsat 7 ETM+, and Landsat 8 OLI imagery from the years 1986, 2000, 2009, 2011, 2013, and 2015 in order to assess land cover changes in the province. The aim of the study was to classify manmade structures, land, green, and water areas, and to observe the changes in the province using satellite images. After classification, the images were compared in selected years to observe land cover. Moreover, these changes were correlated with the property tax values of Istanbul by years...
June 12, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28617674/ultrasensitive-highly-selective-and-real-time-detection-of-protein-using-functionalized-cnts-as-mip-platform-for-fospr-based-biosensor
#20
Anisha Pathak, Shama Parveen, Banshi Dhar Gupta
A facile approach is presented for the detection of Bovine serum albumin (BSA), based on fiber optic SPR (FOSPR) cooperated with molecular imprinting (MIP). The probe is fabricated by exploiting the plasmonic property of silver thin film and vinyl functionalised carbon nanotubes based MIP platform. BSA template molecules are imprinted on the MIP layer coated over multi-walled carbon nanotubes (MWCNTs) to ensure high specificity of the probe in the interfering environments. In addition, FOSPR endorses the sensor capability of real time and remote sensing along with very high sensitivity due to the use of nanostructured MIP platform...
June 15, 2017: Nanotechnology
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