Results 21 to 30 of about 834,727 (299)

Water Benefit-Based Ecological Index for Urban Ecological Environment Quality Assessments

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021
Urbanization and climate change cause the urban ecological environment to become increasingly dependent on water. However, open water areas and green spaces in cities are constantly decreasing, making water resources increasingly scarce.
Zhijun Jiao   +5 more
doaj   +1 more source

Plot-level field monitoring with Sentinel-2 and PlanetScope data for examination of sewage sludge disposal impact [PDF]

open access: yesGeographica Pannonica, 2022
Agricultural use of sewage sludge is one of the means of sustainable environmental management. In order to monitor the short-term effects of sludge disposal a multi-year, high-resolution data collection was planned on arable land in south-eastern Hungary.
Kovács Ferenc, Ladányi Zsuzsanna
doaj   +1 more source

Reducing the spectral index in supernatural inflation [PDF]

open access: yesPhysical Review D, 2009
Supernatural inflation is an attractive model based just on a flat direction with soft SUSY breaking mass terms in the framework of supersymmetry. The beauty of the model is inferred from its name that the model needs no fine-tuning. However, the prediction of the spectral index is $n_s \gae 1$, in contrast to experimental data.
Lin, Chia-Min, Cheung, Kingman
openaire   +2 more sources

Spectral Measures of Small Index Principal Graphs [PDF]

open access: yesCommunications in Mathematical Physics, 2006
23 ...
Banica, Teodor, Bisch, Dietmar
openaire   +2 more sources

On the Spectral Index of Distant Radio Galaxies [PDF]

open access: yes, 2009
The problems of using the spectral index of radio galaxies in various tests, in particular, in selecting distant radio sources are considered. The history of the question of choosing a criterion of searching for distant radio galaxies based on the ...
A. G. Gorshkov   +43 more
core   +1 more source

DEFINITION OF A SPECTRAL MISMATCH INDEX FOR SPECTRAL POWER DISTRIBUTIONS

open access: yesPROCEEDINGS OF the 29th Quadrennial Session of the CIE, 2019
The work leading to this study is partly funded by the European Metrology Programme for Innovation and Research (EMPIR) Project 15SIB07 PhotoLED ‘Future Photometry Based on Solid State Lighting Products’. The EMPIR initiative is cofunded by the European Union’s Horizon 2020 research and innovation programme and the EMPIR Participating States.
Ferrero, Alejandro   +9 more
openaire   +4 more sources

Near-zone sizes and the rest frame extreme ultra-violet spectral index of the highest redshift quasars [PDF]

open access: yes, 2010
The discovery of quasars with redshifts higher than six has prompted a great deal of discussion in the literature regarding the role of quasars, both as sources of reionization, and as probes of the ionization state of the IGM.
Bolton   +44 more
core   +3 more sources

Evaluation of rice bacterial blight severity from lab to field with hyperspectral imaging technique

open access: yesFrontiers in Plant Science, 2022
Hyperspectral imaging technique combined with machine learning is a powerful tool for the evaluation of disease phenotype in rice disease-resistant breeding.
Xiulin Bai   +11 more
doaj   +1 more source

Sensitivity of a Ratio Vegetation Index Derived from Hyperspectral Remote Sensing to the Brown Planthopper Stress on Rice Plants

open access: yesSensors, 2019
Remote sensing end-products related to vegetation have potential applications in monitoring the health of crops. The sensitivity of a spectral index to crop stress determines its application prospect.
Ye Tan   +5 more
doaj   +1 more source

Is Cosmology Compatible with Blue Gravity Waves ? [PDF]

open access: yes, 2008
A primordial gravitational wave background with positive(blue) spectral index is expected in several non-standard inflationary cosmologies where the stress-energy tensor violates the null energy condition.
Camerini, Roberta   +6 more
core   +3 more sources

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