Results 71 to 80 of about 406,860 (186)

Selection of Hyperspectral Vegetation Indices for Monitoring Yield and Physiological Response in Sweet Maize under Different Water and Nitrogen Availability

Agronomy, 2022
This study used hyperspectral reflectance data to evaluate the crop physiological parameters of sweet maize. Principal component analysis (PCA) was applied to identify the wavelengths that primarily contributed to each selected PC.
Mohamed Houssemeddine Sellami, Rossella Albrizio, Milica Čolović, Mohamad Hamze, Vito Cantore, Mladen Todorovic, Lea Piscitelli, Anna Maria Stellacci   +7 more
doaj   +1 more source

New nonadiabatic pulsation computations on full PG1159 evolutionary models: the theoretical GW Vir instability strip revisited [PDF]

, 2006
We reexamine the theoretical instability domain of pulsating PG1159 stars (GW Vir variables). We performed an extensive g-mode stability analysis on PG1159 evolutionary models with stellar masses ranging from 0.530 to 0.741 Mo for which the complete ...
A. H. Córsico, Alexander, Althaus, Blöcker, Bond, Bradley, Ciardullo, Cox, Córsico, Córsico, Dreizler, Fujimoto, Gautschy, Gautschy, Grauer, Herwig, Iglesias, Kawaler, Kawaler, Kawaler, Kawaler, Kawaler, Koesterke, L. G. Althaus, Lee, M. M. Miller Bertolami, Miksa, Miller Bertolami, Nagel, O'Brien, O'Brien, Quirion, Reed, Saio, Schönberner, Silvotti, Starrfield, Tassoul, Unglaub, Vauclair, Vauclair, Werner, Werner, Winget   +43 more
core   +3 more sources

Estimation of Crop Growth Parameters Using UAV-Based Hyperspectral Remote Sensing Data

Sensors, 2020
Above-ground biomass (AGB) and the leaf area index (LAI) are important indicators for the assessment of crop growth, and are therefore important for agricultural management. Although improvements have been made in the monitoring of crop growth parameters
Huilin Tao, Haikuan Feng, Liangji Xu, Mengke Miao, Huiling Long, Jibo Yue, Zhenhai Li, Guijun Yang, Xiaodong Yang, Lingling Fan   +9 more
doaj   +1 more source

Analysis of Cadmium Contamination in Lettuce (Lactuca sativa L.) Using Visible-Near Infrared Reflectance Spectroscopy

Sensors, 2023
In order to rapidly and accurately monitor cadmium contamination in lettuce and understand the growth conditions of lettuce under cadmium pollution, lettuce is used as the test material.
Lina Zhou, Leijinyu Zhou, Hongbo Wu, Lijuan Kong, Jinsheng Li, Jianlei Qiao, Limei Chen   +6 more
doaj   +1 more source

Enhancement of Cyanobacterial Bloom Monitoring in Lake Taihu Using Dual Red-Edge Bands of GF-6/WFV: Multi-Dimensional Feature Combination and Extraction Accuracy Analysis

Remote Sensing
Cyanobacterial blooms pose a serious threat to freshwater ecosystems, necessitating accurate remote sensing monitoring. Although red-edge bands show potential in terrestrial monitoring, their multi-dimensional features (i.e., spectral, textural, and ...
Yunxiao Sun, Ruolin Zhang, Chunhong Zhao, Qingyan Meng, Zhenhui Sun, Jialong Wang, Jun Wu, Yao Wang, Decai Gao, Huyi Guan   +9 more
doaj   +1 more source

Automated Red-Edge Information Feature (ARIF) Program For Vegetation Stress Analysis And Classification. [PDF]

, 2013
This paper describes the development of Automated Red-edge Information Feature (ARIF) program for evaluating vegetation stress condition. The program is developed in the Interactive Data Language (IDL) environment and will enable vegetation ...
Mohd Shafri, Helmi Zulhaidi, Roslan, Siti Nur Aliaa   +1 more
core  

The hot Gamma-Doradus and Maia stars

, 2016
The hot $\gamma$~Doradus stars have multiple low frequencies characteristic of $\gamma$~Dor or SPB variables, but are located between the red edge of the SPB and the blue edge of the $\gamma$~Dor instability strips where all low-frequency modes are ...
Balona, L. A., Chakradhari, N. K., Engelbrecht, C. A., Hema, B. P., Joshi, S., Joshi, Yogesh C., Mkrtichian, David, Nemec, J. M., Pandey, G., Semenko, E., Sharma, K.   +10 more
core   +1 more source

A New Vegetation Index Based on Multitemporal Sentinel-2 Images for Discriminating Heavy Metal Stress Levels in Rice

Sensors, 2018
Heavy metal stress in crops is a worldwide problem that requires accurate and timely monitoring. This study aimed to improve the accuracy of monitoring heavy metal stress levels in rice by using multiple Sentinel-2 images. The selected study areas are in
Zhijiang Zhang, Meiling Liu, Xiangnan Liu, Gaoxiang Zhou   +3 more
doaj   +1 more source

Extraction of fractional vegetation cover in arid desert area based on Chinese GF-6 satellite

Open Geosciences, 2021
The red edge band is considered as one of the diagnosable characteristics of green plants, but the large-scale remote sensing retrieval of fractional vegetation coverage (FVC) based on the red edge band is still rare.
Deng Zhengdong, Lu Zhao, Wang Guangyuan, Wang Daqing, Ding Zhibin, Zhao Hongfei, Xu Haoli, Shi Yue, Cheng Zijian, Zhao Xiaoning   +9 more
doaj   +1 more source

The Red Edge Problem in asteroid band parameter analysis [PDF]

Meteoritics & Planetary Science, 2016
AbstractNear‐infrared reflectance spectra of S‐type asteroids contain two absorptions at 1 and 2 μm (band I and II) that are diagnostic of mineralogy. A parameterization of these two bands is frequently employed to determine the mineralogy of S(IV) asteroids through the use of ordinary chondrite calibration equations that link the mineralogy to band ...
Sean S. Lindsay, Tasha L. Dunn, Joshua P. Emery, Neil E. Bowles   +3 more
openaire   +1 more source