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https://www.readbyqxmd.com/read/28812071/towards-completing-the-cyclopropenylidene-cycle-rovibrational-analysis-of-cyclic-n3-cnn-hcnn-and-cnc
#1
Ryan C Fortenberry, Timothy J Lee, Xinchuan Huang
The simple aromatic hydrocarbon, cyclopropenylidene (c-C3H2), is a known, naturally-occurring molecule. The question remains as to whether its isoelectronic, cyclic, fellow aromatics of c-N3(+), c-CNN, HCNN(+), and c-CNC(-) are as well. Each of these are exciting objects for observation of Titan, and the rotational constants and vibrational frequencies produced here will allow for remote sensing of Titan's atmosphere or other astrophysical or terrestrial sources. None of these four aromatic species are vibrationally strong absorbers/emitters, but the two ions, HCNN(+) and c-CNC(-), have dipole moments of greater than 3 D and 1 D, respectively, making them good targets for rotational spectroscopic observation...
August 16, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28811557/separating-vegetation-greening-and-climate-change-controls-on-evapotranspiration-trend-over-the-loess-plateau
#2
Zhao Jin, Wei Liang, Yuting Yang, Weibin Zhang, Jianwu Yan, Xuejuan Chen, Sha Li, Xingguo Mo
Evapotranspiration (ET) is a key ecological process connecting the soil-vegetation-atmosphere system, and its changes seriously affects the regional distribution of available water resources, especially in the arid and semiarid regions. With the Grain-for-Green project implemented in the Loess Plateau (LP) since 1999, water and heat distribution across the region have experienced great changes. Here, we investigate the changes and associated driving forces of ET in the LP from 2000 to 2012 using a remote sensing-based evapotranspiration model...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28811521/decadal-trends-in-red-sea-maximum-surface-temperature
#3
V Chaidez, D Dreano, S Agusti, C M Duarte, I Hoteit
Ocean warming is a major consequence of climate change, with the surface of the ocean having warmed by 0.11 °C decade(-1) over the last 50 years and is estimated to continue to warm by an additional 0.6 - 2.0 °C before the end of the century(1). However, there is considerable variability in the rates experienced by different ocean regions, so understanding regional trends is important to inform on possible stresses for marine organisms, particularly in warm seas where organisms may be already operating in the high end of their thermal tolerance...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28810506/controls-on-anastomosis-in-lowland-river-systems-towards-process-based-solutions-to-habitat-conservation
#4
Paweł Marcinkowski, Robert C Grabowski, Tomasz Okruszko
Anastomosing rivers were historically common around the world before extensive agricultural and industrial development in river valleys. Few lowland anastomosing rivers remain in temperate zones, and the protection of these river-floodplain systems is an international conservation priority. However, the mechanisms that drive the creation and maintenance of multiple channels, i.e. anabranches, are not well understood, particularly for lowland rivers, making it challenging to identify effective management strategies...
August 8, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28800689/evaluation-of-edar-vehicle-emissions-remote-sensing-technology
#5
Karl Ropkins, Timothy H DeFries, Francis Pope, David C Green, Jim Kemper, Sandeep Kishan, Gary W Fuller, Hu Li, Jim Sidebottom, Leigh R Crilley, Louisa Kramer, William J Bloss, J Stewart Hager
Despite much work in recent years, vehicle emissions remain a significant contributor in many areas where air quality standards are under threat. Policy-makers are actively exploring options for next generation vehicle emission control and local fleet management policies, and new monitoring technologies to aid these activities. Therefore, we report here on findings from two separate but complementary blind evaluation studies of one new-to-market real-world monitoring option, HEAT LLC's Emission Detection And Reporting system or EDAR, an above-road open path instrument that uses Differential Absorption LIDAR to provide a highly sensitive and selective measure of passing vehicle emissions...
August 7, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28800111/translational-imaging-spectroscopy-for-proximal-sensing
#6
Christian Rogass, Friederike M Koerting, Christian Mielke, Maximilian Brell, Nina K Boesche, Maria Bade, Christian Hohmann
Proximal sensing as the near field counterpart of remote sensing offers a broad variety of applications. Imaging spectroscopy in general and translational laboratory imaging spectroscopy in particular can be utilized for a variety of different research topics. Geoscientific applications require a precise pre-processing of hyperspectral data cubes to retrieve at-surface reflectance in order to conduct spectral feature-based comparison of unknown sample spectra to known library spectra. A new pre-processing chain called GeoMAP-Trans for at-surface reflectance retrieval is proposed here as an analogue to other algorithms published by the team of authors...
August 11, 2017: Sensors
https://www.readbyqxmd.com/read/28800065/validating-modis-and-sentinel-2-ndvi-products-at-a-temperate-deciduous-forest-site-using-two-independent-ground-based-sensors
#7
Maximilian Lange, Benjamin Dechant, Corinna Rebmann, Michael Vohland, Matthias Cuntz, Daniel Doktor
Quantifying the accuracy of remote sensing products is a timely endeavor given the rapid increase in Earth observation missions. A validation site for Sentinel-2 products was hence established in central Germany. Automatic multispectral and hyperspectral sensor systems were installed in parallel with an existing eddy covariance flux tower, providing spectral information of the vegetation present at high temporal resolution. Normalized Difference Vegetation Index (NDVI) values from ground-based hyperspectral and multispectral sensors were compared with NDVI products derived from Sentinel-2A and Moderate-resolution Imaging Spectroradiometer (MODIS)...
August 11, 2017: Sensors
https://www.readbyqxmd.com/read/28799937/multi-criteria-analysis-of-site-selection-for-groundwater-recharge-with-treated-municipal-wastewater
#8
Mohammad Mehdi Ahmadi, Hadi Mahdavirad, Bahram Bakhtiari
Geographic information systems (GIS) and remote sensing techniques are used as a decision support system to identify potential soil aquifer treatment (SAT) sites for groundwater recharge of Kerman aquifer, which is located in the southeast of Iran. These sites are identified using a single-objective multi-criteria analysis. To ensure technical feasibility, environmental sustainability, social acceptability and economical viability a number of criteria are considered for the site selection. The criteria selected for the different variables and acceptable ranges are based on standards published in national and international guidelines and technical documents...
August 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28795044/n-glycoproteomic-analysis-of-human-follicular-fluid-during-natural-and-stimulated-cycles-in-patients-undergoing-in-vitro-fertilization
#9
Hee-Joung Lim, Ae Eun Seok, Jiyou Han, Jiyeong Lee, Sungeun Lee, Hee-Gyoo Kang, Byung Heun Cha, Yunseok Yang
OBJECTIVE: Hyperstimulation methods are broadly used for in vitro fertilization (IVF) in patients with infertility; however, the side effects associated with these therapies, such as ovarian hyperstimulation syndrome (OHSS), have not been well studied. N-glycoproteomes are subproteomes used for the remote sensing of ovarian stimulation in follicular growth. Glycoproteomic variation in human follicular fluid (hFF) has not been evaluated. In this study, we aimed to identify and quantify the glycoproteomes and N-glycoproteins (N-GPs) in natural and stimulated hFF using label-free nano-liquid chromatography/electrospray ionization-quad time-of-flight mass spectrometry...
June 2017: Clinical and Experimental Reproductive Medicine
https://www.readbyqxmd.com/read/28793810/remote-sensing-tropical-coral-reefs-the-view-from-above
#10
Sam J Purkis
Carbonate precipitation has been a common life strategy for marine organisms for 3.7 billion years, as, therefore, has their construction of reefs. As favored by modern corals, reef-forming organisms have typically adopted a niche in warm, shallow, well-lit, tropical marine waters, where they are capable of building vast carbonate edifices. Because fossil reefs form water aquifers and hydrocarbon reservoirs, considerable effort has been dedicated to understanding their anatomy and morphology. Remote sensing has a particular role to play here...
August 9, 2017: Annual Review of Marine Science
https://www.readbyqxmd.com/read/28793008/geo-environmental-zoning-using-physiographic-compartmentalization-a-proposal-for-supporting-sustainable-decision-making
#11
Claudia V S Corrêa, Fábio A G V Reis, Lucilia C Giordano, Adriano Bressane, Camila J Chaves, Ana Maria C DO Amaral, Hermes D Brito, Gerson A DE Medeiros
The geo-environmental zoning represents an important strategy in the territorial management. However, it requires a logical and structured procedure. Therefore, an approach using physiographic compartmentalization is proposed and applied as case study in a region covered by the topographic maps of São José dos Campos and Jacareí, Brazil. This region has great geological and geomorphological peculiarities, beyond being a place with large human interventions because of its quickly economic growth. The methodology is based on photointerpretation techniques and remote sensing in GIS environment...
August 7, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28792208/fiber-coupled-substrate-integrated-hollow-waveguides-an-innovative-approach-to-mid-infrared-remote-gas-sensors
#12
Erhan Tütüncü, Vjekoslav Kokoric, Andreas WIlk, Felicia Seichter, Michael Schmid, William E Hunt, Anastacia M Manuel, Paul Mirkarimi, Jennifer B Alameda, J Chance Carter, Boris Mizaikoff
In this study, an innovative approach based on fiberoptically coupled substrate-integrated hollow waveguide (iHWG) gas cells for the analysis of low sample volumes suitable for remote broad- and narrow-band mid-infrared (MIR; 2.5-20 μm) sensing applications is reported. The feasibility of remotely addressing iHWG gas cells, configured in a double-pass geometry via a reflector, by direct coupling to a 7-around-1 mid-infrared fiber bundle is demonstrated, facilitating low-level hydrocarbon gas analysis. For comparison studies, two iHWGs with substrate dimensions of 50×50×12 mm (L × W × H) and geometric channel lengths of 138 mm and 58...
August 9, 2017: ACS Sensors
https://www.readbyqxmd.com/read/28783442/a-literature-review-on-current-and-proposed-technologies-of-noninvasive-blood-pressure-measurement
#13
Ramtanu Mukherjee, Sanchita Ghosh, Bharat Gupta, Tapas Chakravarty
BACKGROUND: Noninvasive continuous blood pressure (BP) measurement has become an evolving topic in the field of remote healthcare. The classical noninvasive BP measurement techniques provide spontaneous values of systolic and diastolic BP. On the other hand, intrusive type BP measurement techniques provide continuous values of systolic and diastolic BP. However, these techniques are very painful, cannot be used for long-term monitoring, and are obtainable only in an intensive care unit environment...
August 7, 2017: Telemedicine Journal and E-health: the Official Journal of the American Telemedicine Association
https://www.readbyqxmd.com/read/28783079/an-ultra-low-power-turning-angle-based-biomedical-signal-compression-engine-with-adaptive-threshold-tuning
#14
Jun Zhou, Chao Wang
Intelligent sensing is drastically changing our everyday life including healthcare by biomedical signal monitoring, collection, and analytics. However, long-term healthcare monitoring generates tremendous data volume and demands significant wireless transmission power, which imposes a big challenge for wearable healthcare sensors usually powered by batteries. Efficient compression engine design to reduce wireless transmission data rate with ultra-low power consumption is essential for wearable miniaturized healthcare sensor systems...
August 6, 2017: Sensors
https://www.readbyqxmd.com/read/28780674/assessment-of-changes-in-formations-of-non-forest-woody-vegetation-in-southern-denmark-based-on-airborne-lidar
#15
Ioannis Angelidis, Gregor Levin, Ramón Alberto Díaz-Varela, Radek Malinowski
LiDAR (Light Detection and Ranging) is a remote sensing technology that uses light in the form of pulses to measure the range between a sensor and the Earth's surface. Recent increase in availability of airborne LiDAR scanning (ALS) data providing national coverage with high point densities has opened a wide range of possibilities for monitoring landscape elements and their changes at broad geographical extent. We assessed the dynamics of the spatial extent of non-forest woody vegetation (NFW) in a study area of approx...
September 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28777811/a-machine-learning-approach-to-estimation-of-downward-solar-radiation-from-satellite-derived-data-products-an-application-over-a-semi-arid-ecosystem-in-the-u-s
#16
Qingtao Zhou, Alejandro Flores, Nancy F Glenn, Reggie Walters, Bangshuai Han
Shortwave solar radiation is an important component of the surface energy balance and provides the principal source of energy for terrestrial ecosystems. This paper presents a machine learning approach in the form of a random forest (RF) model for estimating daily downward solar radiation flux at the land surface over complex terrain using MODIS (MODerate Resolution Imaging Spectroradiometer) remote sensing data. The model-building technique makes use of a unique network of 16 solar flux measurements in the semi-arid Reynolds Creek Experimental Watershed and Critical Zone Observatory, in southwest Idaho, USA...
2017: PloS One
https://www.readbyqxmd.com/read/28769060/a-diver-operated-hyperspectral-imaging-and-topographic-surveying-system-for-automated-mapping-of-benthic-habitats
#17
Arjun Chennu, Paul Färber, Glenn De'ath, Dirk de Beer, Katharina E Fabricius
We developed a novel integrated technology for diver-operated surveying of shallow marine ecosystems. The HyperDiver system captures rich multifaceted data in each transect: hyperspectral and color imagery, topographic profiles, incident irradiance and water chemistry at a rate of 15-30 m(2) per minute. From surveys in a coral reef following standard diver protocols, we show how the rich optical detail can be leveraged to generate photopigment abundance and benthic composition maps. We applied machine learning techniques, with a minor annotation effort (<2% of pixels), to automatically generate cm-scale benthic habitat maps of high taxonomic resolution and accuracy (93-97%)...
August 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28768750/echo-acoustic-scanning-with-noseleaf-and-ears-in-phyllostomid-bats
#18
Kathrin Kugler, Lutz Wiegrebe
The mammalian visual system is highly directional and mammals typically employ rapid eye movements to scan their environment. Both sound emission and hearing in echolocating bats are directional but not much is known about how bats use ear movements and possibly movements of the sound-emitting structures to scan space. Here, we investigated in a tightly controlled behavioural experiment how Phyllostomusdiscolor bats employ their echolocation system while being moved through differently structured environments: we monitored and reconstructed both a close-up of the facial structures in 3D, including the motile noseleaf and outer ears, and the sonar-beam of the bat while it was moved along reflectors...
August 1, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28767649/oiling-accelerates-loss-of-salt-marshes-southeastern-louisiana
#19
Michael Beland, Trent W Biggs, Dar A Roberts, Seth H Peterson, Raymond F Kokaly, Sarai Piazza
The 2010 BP Deepwater Horizon (DWH) oil spill damaged thousands of km2 of intertidal marsh along shorelines that had been experiencing elevated rates of erosion for decades. Yet, the contribution of marsh oiling to landscape-scale degradation and subsequent land loss has been difficult to quantify. Here, we applied advanced remote sensing techniques to map changes in marsh land cover and open water before and after oiling. We segmented the marsh shorelines into non-oiled and oiled reaches and calculated the land loss rates for each 10% increase in oil cover (e...
2017: PloS One
https://www.readbyqxmd.com/read/28767377/denoising-hyperspectral-image-with-non-i-i-d-noise-structure
#20
Yang Chen, Xiangyong Cao, Qian Zhao, Deyu Meng, Zongben Xu
Hyperspectral image (HSI) denoising has been attracting much research attention in remote sensing area due to its importance in improving the HSI qualities. The existing HSI denoising methods mainly focus on specific spectral and spatial prior knowledge in HSIs, and share a common underlying assumption that the embedded noise in HSI is independent and identically distributed (i.i.d.). In real scenarios, however, the noise existed in a natural HSI is always with much more complicated non-i.i.d. statistical structures and the under-estimation to this noise complexity often tends to evidently degenerate the robustness of current methods...
July 27, 2017: IEEE Transactions on Cybernetics
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