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https://www.readbyqxmd.com/read/28934160/zy3-02-laser-altimeter-footprint-geolocation-prediction
#1
Junfeng Xie, Xinming Tang, Fan Mo, Guoyuan Li, Guangbin Zhu, Zhenming Wang, Xingke Fu, Xiaoming Gao, Xianhui Dou
Successfully launched on 30 May 2016, ZY3-02 is the first Chinese surveying and mapping satellite equipped with a lightweight laser altimeter. Calibration is necessary before the laser altimeter becomes operational. Laser footprint location prediction is the first step in calibration that is based on ground infrared detectors, and it is difficult because the sample frequency of the ZY3-02 laser altimeter is 2 Hz, and the distance between two adjacent laser footprints is about 3.5 km. In this paper, we build an on-orbit rigorous geometric prediction model referenced to the rigorous geometric model of optical remote sensing satellites...
September 21, 2017: Sensors
https://www.readbyqxmd.com/read/28933770/effects-of-land-use-cover-changes-and-urban-forest-configuration-on-urban-heat-islands-in-a-loess-hilly-region-case-study-based-on-yan-an-city-china
#2
Xinping Zhang, Dexiang Wang, Hongke Hao, Fangfang Zhang, Youning Hu
In this study Yan'an City, a typical hilly valley city, was considered as the study area in order to explain the relationships between the surface urban heat island (SUHI) and land use/land cover (LULC) types, the landscape pattern metrics of LULC types and land surface temperature (LST) and remote sensing indexes were retrieved from Landsat data during 1990-2015, and to find factors contributed to the green space cool island intensity (GSCI) through field measurements of 34 green spaces. The results showed that during 1990-2015, because of local anthropogenic activities, SUHI was mainly located in lower vegetation cover areas...
July 26, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28931744/using-multiple-lines-of-evidence-to-assess-the-risk-of-ecosystem-collapse
#3
Lucie M Bland, Tracey J Regan, Minh Ngoc Dinh, Renata Ferrari, David A Keith, Rebecca Lester, David Mouillot, Nicholas J Murray, Hoang Anh Nguyen, Emily Nicholson
Effective ecosystem risk assessment relies on a conceptual understanding of ecosystem dynamics and the synthesis of multiple lines of evidence. Risk assessment protocols and ecosystem models integrate limited observational data with threat scenarios, making them valuable tools for monitoring ecosystem status and diagnosing key mechanisms of decline to be addressed by management. We applied the IUCN Red List of Ecosystems criteria to quantify the risk of collapse of the Meso-American Reef, a unique ecosystem containing the second longest barrier reef in the world...
September 27, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28931461/detection-of-the-power-lines-in-uav-remote-sensed-images-using-spectral-spatial-methods
#4
Rishav Bhola, Nandigam Hari Krishna, K N Ramesh, J Senthilnath, Gautham Anand
In this paper, detection of the power lines on images acquired by Unmanned Aerial Vehicle (UAV) based remote sensing is carried out using spectral-spatial methods. Spectral clustering was performed using Kmeans and Expectation Maximization (EM) algorithm to classify the pixels into the power lines and non-power lines. The spectral clustering methods used in this study are parametric in nature, to automate the number of clusters Davies-Bouldin index (DBI) is used. The UAV remote sensed image is clustered into the number of clusters determined by DBI...
September 17, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28928720/potential-risk-areas-of-aedes-albopictus-in-south-eastern-iran-a-vector-of-dengue-fever-zika-and-chikungunya
#5
Jalil Nejati, Rubén Bueno-Marí, Francisco Collantes, Ahmad A Hanafi-Bojd, Hassan Vatandoost, Zabihollah Charrahy, Seyed M Tabatabaei, Mohammad R Yaghoobi-Ershadi, Abdolghafar Hasanzehi, Mohammad R Shirzadi, Seyed H Moosa-Kazemi, Mohammad M Sedaghat
The possibility of the rapid and global spread of Zika, chikungunya, yellow fever, and dengue fever by Aedes albopictus is well documented and may be facilitated by changes in climate. To avert and manage health risks, climatic and topographic information can be used to model and forecast which areas may be most prone to the establishment of Ae. albopictus. We aimed to weigh and prioritize the predictive value of various meteorological and climatic variables on distributions of Ae. albopictus in south-eastern Iran using the Analytical Hierarchy Process...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28925947/a-dynamic-multi-projection-contour-approximating-framework-for-the-3d-reconstruction-of-buildings-by-super-generalized-optical-stereo-pairs
#6
Yiming Yan, Nan Su, Chunhui Zhao, Liguo Wang
In this paper, a novel framework of the 3D reconstruction of buildings is proposed, focusing on remote sensing super-generalized stereo-pairs (SGSPs). As we all know, 3D reconstruction cannot be well performed using nonstandard stereo pairs, since reliable stereo matching could not be achieved when the image-pairs are collected at a great difference of views, and we always failed to obtain dense 3D points for regions of buildings, and cannot do further 3D shape reconstruction. We defined SGSPs as two or more optical images collected in less constrained views but covering the same buildings...
September 19, 2017: Sensors
https://www.readbyqxmd.com/read/28922491/temporal-and-remote-tuning-of-piezophotonic-effect-induced-luminescence-and-color-gamut-via-modulating-magnetic-field
#7
Man-Chung Wong, Li Chen, Gongxun Bai, Long-Biao Huang, Jianhua Hao
Light-emitting materials have been extensively investigated because of their widespread applications in solid-state lighting, displays, sensors, and bioimaging. In these applications, it is highly desirable to achieve tunable luminescence in terms of luminescent intensity and wavelength. Here, a convenient physical approach of temporal and remote tuning of light-emitting wavelength and color is demonstrated, which is greatly different from conventional methods. It is shown that by modulating the frequency of magnetic-field excitation at room temperature, luminescence from the flexible composites of ZnS:Al, Cu phosphors induced by the piezophotonic effect can be tuned in real time and in situ...
September 18, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28920907/energy-analysis-of-decoders-for-rakeness-based-compressed-sensing-of-ecg-signals
#8
Fabio Pareschi, Mauro Mangia, Daniele Bortolotti, Andrea Bartolini, Luca Benini, Riccardo Rovatti, Gianluca Setti
In recent years, compressed sensing (CS) has proved to be effective in lowering the power consumption of sensing nodes in biomedical signal processing devices. This is due to the fact the CS is capable of reducing the amount of data to be transmitted to ensure correct reconstruction of the acquired waveforms. Rakeness-based CS has been introduced to further reduce the amount of transmitted data by exploiting the uneven distribution to the sensed signal energy. Yet, so far no thorough analysis exists on the impact of its adoption on CS decoder performance...
September 13, 2017: IEEE Transactions on Biomedical Circuits and Systems
https://www.readbyqxmd.com/read/28919936/polar-applications-of-spaceborne-scatterometers
#9
David G Long
Wind scatterometers were originally developed for observation of near-surface winds over the ocean. They retrieve wind indirectly by measuring the normalized radar cross section (σ(o) ) of the surface, and estimating the wind via a geophysical model function relating σ(o) to the vector wind. The σ(o) measurements have proven to be remarkably capable in studies of the polar regions where they can map snow cover; detect the freeze/thaw state of forest, tundra, and ice; map and classify sea ice; and track icebergs...
May 2017: IEEE J Sel Top Appl Earth Obs Remote Sens
https://www.readbyqxmd.com/read/28915461/forecasting-wheat-and-barley-crop-production-in-arid-and-semi-arid-regions-using-remotely-sensed-primary-productivity-and-crop-phenology-a-case-study-in-iraq
#10
Sarchil Hama Qader, Jadunandan Dash, Peter M Atkinson
Crop production and yield estimation using remotely sensed data have been studied widely, but such information is generally scarce in arid and semi-arid regions. In these regions, inter-annual variation in climatic factors (such as rainfall) combined with anthropogenic factors (such as civil war) pose major risks to food security. Thus, an operational crop production estimation and forecasting system is required to help decision-makers to make early estimates of potential food availability. Data from NASA's MODIS with official crop statistics were combined to develop an empirical regression-based model to forecast winter wheat and barley production in Iraq...
September 12, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28914787/a-sparse-dictionary-learning-based-adaptive-patch-inpainting-method-for-thick-clouds-removal-from-high-spatial-resolution-remote-sensing-imagery
#11
Fan Meng, Xiaomei Yang, Chenghu Zhou, Zhi Li
Cloud cover is inevitable in optical remote sensing (RS) imagery on account of the influence of observation conditions, which limits the availability of RS data. Therefore, it is of great significance to be able to reconstruct the cloud-contaminated ground information. This paper presents a sparse dictionary learning-based image inpainting method for adaptively recovering the missing information corrupted by thick clouds patch-by-patch. A feature dictionary was learned from exemplars in the cloud-free regions, which was later utilized to infer the missing patches via sparse representation...
September 15, 2017: Sensors
https://www.readbyqxmd.com/read/28906446/a-novel-low-power-consumption-all-fiber-optic-anemometer-with-simple-system-design
#12
Yang Zhang, Fang Wang, Zhihui Duan, Zexu Liu, Zigeng Liu, Zhenlin Wu, Yiying Gu, Changsen Sun, Wei Peng
A compact and low-power consuming fiber-optic anemometer based on single-walled carbon nanotubes (SWCNTs) coated tilted fiber Bragg grating (TFBG) is presented. TFBG as a near infrared in-fiber sensing element is able to excite a number of cladding modes and radiation modes in the fiber and effectively couple light in the core to interact with the fiber surrounding mediums. It is an ideal in-fiber device used in a fiber hot-wire anemometer (HWA) as both coupling and sensing elements to simplify the sensing head structure...
September 14, 2017: Sensors
https://www.readbyqxmd.com/read/28905426/optically-controlled-on-coil-amplifier-with-rf-monitoring-feedback
#13
Natalia Gudino, Jacco A de Zwart, Qi Duan, Stephen J Dodd, Joe Murphy-Boesch, Peter van Gelderen, Jeff H Duyn
PURPOSE: To develop a new optically controlled on-coil amplifier that facilitates safe use of multi-channel radiofrequency (RF) transmission in MRI by real-time monitoring of signal phase and amplitude. METHODS: Monitoring was carried out with a 4-channel prototype system by sensing, down sampling, digitizing, and optically transmitting the RF transmit signal to a remote PC to control the amplifiers. Performance was evaluated with benchtop and 7 T MRI experiments...
September 14, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28902905/bio-physical-characterisation-of-polynyas-as-a-key-foraging-habitat-for-juvenile-male-southern-elephant-seals-mirounga-leonina-in-prydz-bay-east-antarctica
#14
Veda Malpress, Sophie Bestley, Stuart Corney, Dirk Welsford, Sara Labrousse, Michael Sumner, Mark Hindell
Antarctic coastal polynyas are persistent open water areas in the sea ice zone, and regions of high biological productivity thought to be important foraging habitat for marine predators. This study quantified southern elephant seal (Mirounga leonina) habitat use within and around the polynyas of the Prydz Bay region (63°E- 88°E) in East Antarctica, and examined the bio-physical characteristics structuring polynyas as foraging habitat. Output from a climatological regional ocean model was used to provide context for in situ temperature-salinity vertical profiles collected by tagged elephant seals and to characterise the physical properties structuring polynyas...
2017: PloS One
https://www.readbyqxmd.com/read/28901831/collaboration-between-biomedical-and-complementary-and-alternative-care-providers-barriers-and-pathways
#15
Alberta S J van der Watt, Gareth Nortje, Lola Kola, John Appiah-Poku, Caleb Othieno, Benjamin Harris, Bibilola D Oladeji, Oluyomi Esan, Victor Makanjuola, LeShawndra N Price, Soraya Seedat, Oye Gureje
We examined the scope of collaborative care for persons with mental illness as implemented by traditional healers, faith healers, and biomedical care providers. We conducted semistructured focus group discussions in Ghana, Kenya, and Nigeria with traditional healers, faith healers, biomedical care providers, patients, and their caregivers. Transcribed data were thematically analyzed. A barrier to collaboration was distrust, influenced by factionalism, charlatanism, perceptions of superiority, limited roles, and responsibilities...
September 1, 2017: Qualitative Health Research
https://www.readbyqxmd.com/read/28900182/conservation-performance-of-different-conservation-governance-regimes-in-the-peruvian-amazon
#16
Judith Schleicher, Carlos A Peres, Tatsuya Amano, William Llactayo, Nigel Leader-Williams
State-controlled protected areas (PAs) have dominated conservation strategies globally, yet their performance relative to other governance regimes is rarely assessed comprehensively. Furthermore, performance indicators of forest PAs are typically restricted to deforestation, although the extent of forest degradation is greater. We address these shortfalls through an empirical impact evaluation of state PAs, Indigenous Territories (ITs), and civil society and private Conservation Concessions (CCs) on deforestation and degradation throughout the Peruvian Amazon...
September 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28898465/polar-electrode-bridged-electroluminescent-displays-2d-sensors-remotely-communicating-optically
#17
Xiuru Xu, Dan Hu, Lijia Yan, Shaoli Fang, Clifton Shen, Yueh-Lin Loo, Yuan Lin, Carter S Haines, Na Li, Anvar A Zakhidov, Hong Meng, Ray H Baughman, Wei Huang
A novel geometry for electroluminescent devices, which does not require transparent electrodes for electrical input, is demonstrated, theoretically analyzed, and experimentally characterized. Instead of emitting light through a conventional electrode, light emission occurs through a polar liquid or solid and input electrical electrodes are coplanar, rather than stacked in a sandwich configuration. This new device concept is scalable and easily deployed for a range of modular alternating-current-powered electroluminescent light sources and light-emitting sensing devices...
September 12, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28894961/digital-soil-mapping-using-remote-sensing-indices-terrain-attributes-and-vegetation-features-in-the-rangelands-of-northeastern-iran
#18
Ebrahim Mahmoudabadi, Alireza Karimi, Gholam Hosain Haghnia, Adel Sepehr
Digital soil mapping has been introduced as a viable alternative to the traditional mapping methods due to being fast and cost-effective. The objective of the present study was to investigate the capability of the vegetation features and spectral indices as auxiliary variables in digital soil mapping models to predict soil properties. A region with an area of 1225 ha located in Bajgiran rangelands, Khorasan Razavi province, northeastern Iran, was chosen. A total of 137 sampling sites, each containing 3-5 plots with 10-m interval distance along a transect established based on randomized-systematic method, were investigated...
September 11, 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28892867/land-surface-temperature-as-an-indicator-of-the-unsaturated-zone-thickness-a-remote-sensing-approach-in-the-atacama-desert
#19
Harry Urqueta, Jorge Jódar, Christian Herrera, Hans-G Wilke, Agustín Medina, Javier Urrutia, Emilio Custodio, Jazna Rodríguez
Land surface temperature (LST) seems to be related to the temperature of shallow aquifers and the unsaturated zone thickness (∆Zuz). That relationship is valid when the study area fulfils certain characteristics: a) there should be no downward moisture fluxes in an unsaturated zone, b) the soil composition in terms of both, the different horizon materials and their corresponding thermal and hydraulic properties, must be as homogeneous and isotropic as possible, c) flat and regular topography, and d) steady state groundwater temperature with a spatially homogeneous temperature distribution...
September 7, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28892864/multi-sensor-satellite-and-in-situ-monitoring-of-phytoplankton-development-in-a-eutrophic-mesotrophic-lake
#20
Katja Dörnhöfer, Philip Klinger, Thomas Heege, Natascha Oppelt
Phytoplankton indicated by its photosynthetic pigment chlorophyll-a is an important pointer on lake ecology and a regularly monitored parameter within the European Water Framework Directive. Along with eutrophication and global warming cyanobacteria gain increasing importance concerning human health aspects. Optical remote sensing may support both the monitoring of horizontal distribution of phytoplankton and cyanobacteria at the lake surface and the reduction of spatial uncertainties associated with limited water sample analyses...
September 7, 2017: Science of the Total Environment
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