Results 41 to 50 of about 7,981 (208)

Multiparametric MRI ISODATA Ischemic Lesion Analysis [PDF]

Stroke, 2002
Background and Purpose— The purpose of this study was to show that the computer segmentation algorithm Iterative Self-Organizing Data Analysis Technique (ISODATA), which integrates multiple MRI parameters (diffusion-weighted imaging [DWI], T2-weighted imaging [T2WI], and T1-weighted imaging [T1WI ...
Panayiotis D, Mitsias, Michael A, Jacobs, Rabih, Hammoud, Mamatha, Pasnoor, Sunitha, Santhakumar, Nikolaos I H, Papamitsakis, Hamid, Soltanian-Zadeh, Mei, Lu, Michael, Chopp, Suresh C, Patel   +9 more
openaire   +2 more sources

An Acoustic Propagation‐Guided Scaling Clustering Method of Ocean Sound Speed Gradients and Environmental Effect Analysis

Journal of Geophysical Research: Machine Learning and Computation, Volume 2, Issue 4, December 2025.
Abstract The use of unsupervised clustering methods to classify hydroacoustic profiles with similar structures in the study area, and subsequently divide them into distinct marine regions based on acoustic propagation characteristics, facilitates targeted research on the environmental effects of underwater acoustics in different sea areas.
Jiawei Jiang, Lin Zhang
wiley   +1 more source

Pilot investigation of remote sensing for intertidal oyster mapping in coastal South Carolina: a methods comparison [PDF]

, 2003
South Carolina’s oyster reefs are a major component of the coastal landscape. Eastern oysters Crassostrea virginica are an important economic resource to the state and serve many essential functions in the environment, including water filtration, creek ...

core  

A methodology for the characterization of land use using medium-resolution spatial images [PDF]

, 2018
Introducción: La caracterización de los usos del suelo representa uno de los insumos indispensables para el manejo de los recursos naturales a diferentes escalas.
Gandini, Marcelo Luciano, Guevara Ochoa, Cristian, Lara, Bruno Daniel, Vives, Luis Sebastián, Zimmermann, Erik Daniel   +4 more
core   +1 more source

Leveraging digital soil maps and clustering techniques to enhance soil management zone delineation

Agronomy Journal, Volume 117, Issue 6, November/December 2025.
Abstract Management zone (MZ) or variability zone delineation is a critical component of precision agriculture (PA), enabling site‐specific management to optimize crop production and resource efficiency in response to within‐field variability. This study evaluated whether digital soil maps (DSM or continuous soil property prediction maps) can serve as ...
Darya Abbasi, Amanda J. Ashworth, Phillip R. Owens, H. Edwin Winzeler, Tulsi Kharel, Yuan Zhou   +5 more
wiley   +1 more source

Estimation model of wild fractional vegetation cover based on RGB vegetation index and its application

Open Geosciences
An accurate survey of field vegetation information facilitates the evaluation of ecosystems and the improvement of remote sensing models. Extracting fractional vegetation cover (FVC) information using aerial images is one of the important areas of ...
Dai Shaojun, Zhou Jian, Ning Xianping, Xu Jianxin, Wang Hua   +4 more
doaj   +1 more source

Reconstruction of spatially continuous time-series land subsidence based on PS-InSAR and improved MLS-SVR in Beijing Plain area

GIScience & Remote Sensing, 2023
Beijing has undergone severe settlement in recent years. Persistent Scatterers Interferometric Synthetic Aperture Radar (PS-InSAR) technique has been widely used to derive time-series land deformation. However, existing studies have faced two challenges:
Mingyuan Lyu, Xiaojuan Li, Yinghai Ke, Jiyi Jiang, Lin Zhu, Lin Guo, Huili Gong, Beibei Chen, Zhihe Xu, Ke Zhang, Zhanpeng Wang   +10 more
doaj   +1 more source

Linking Land‐Use/Cover Change With Landscape‐Based Drivers in Contrasting Agro‐Ecological Environments of the East African Rift System

Food and Energy Security, Volume 14, Issue 6, November/December 2025.
Use of Landsat data to drive land use/cover classes between 1986 and 2024. Geospatial and regression model to detect land use/cover change and associated driving factors. Land use/cover change along topographic gradient. 44% of land use/cover undergo to transition. Land use/cover change associated with 15 driving factors.
Woubshet Negussie, Wei Wu, Yirsaw Eshetu, Temesgen Habtamu, Legesse Abiyot, Ketema Haile, Belew Bekele   +6 more
wiley   +1 more source

Residual acceleration data on IML-1: Development of a data reduction and dissemination plan [PDF]

The research performed consisted of three stages: (1) identification of sensitive IML-1 experiments and sensitivity ranges by order of magnitude estimates, numerical modeling, and investigator input; (2) research and development towards reduction ...
Alexander, J. Iwan D., Rogers, Melissa J. B.   +1 more
core   +5 more sources

Abordagem metodológica baseada em imagens do SAR-R99B para identificar prováveis pistas de pouso não-homologadas na Amazônia Methodological approach based on SAR-R99B radar images to identify potential unofficial airplane strips in Amazonia

Acta Amazonica, 2009
Este estudo apresenta uma abordagem metodológica baseada em imagens de radar e nos critérios de tonalidade, tamanho e forma geométrica para identificar prováveis pistas de pouso não-homologadas na Amazônia.
Sergio Alexandre Saloio Alves, Luis Ricardo Assante, Edson Eyji Sano, Paulo Roberto Meneses   +3 more
doaj   +1 more source