In this paper, we introduce a natural variation of the problem of computing all bichromatic intersections between two sets of segments. Given two sets R and B of n points in the plane defining two sets of segments, say red and blue, we present an O(n) time and space algorithm for solving the problem of reporting the set of segments of each color intersected by segments of the other color. We al...

Iron is an indicator for soil fertility and the usability of an area for cultivating crops. Remote sensing is the only suitable tool for surveying large areas at a high temporal and spatial interval, yet a relative high spectral resolution is needed for mapping iron contents with reflectance data. Sentinel-2 has several bands that cover the 0.9 μm iron absorption feature, while space-borne sens...

Estimating gross primary production (GPP), the uptake of CO 2 by vegetation, is a fundamental prerequisite for understanding and quantifying terrestrial carbon cycle. Over last decade, multiple approaches have been developed to derive spatiotemporal dynamics GPP combining <italic xmlns:xlink="ht...

  Introduction: Sentinel lymph node biopsy is the standard procedure for lymph node staging in intermediate thickness melanoma. In Iran, this procedure has not been addressed sufficiently. In this study, we report our experience in this area. Methods: Ten consecutive patients with intermediate thickness melanoma where included in our study. 1.5 mCi of Tc-99m antimony...

The actual condition of vegetation cover is represented by its spectral signature. Photosynthetic active vegetation is characterized by a low reflectance in the red and a high reflectance in the near infrared spectra. This specific feature is used to calculate different vegetation indices. One index is the MERIS Global Vegetation Index (MGVI), the other one is the Red Edge Position (REP), which...

The objective of this study was to develop a rapid non-destructive technique to estimate total chlorophyll (Chl) content in a maize canopy using Chl content in a single leaf. The approach was (1) to calibrate and validate a reflectance-based non-destructive technique to estimate leaf Chl in maize; (2) to quantify the relative contribution of each leaf Chl to the total Chl in the canopy; and (3)...

In recent decades, many spectral vegetation indices (SVIs) have been proposed to estimate the leaf nitrogen concentration (LNC) of crops. However, most of these indices were based on the field hyperspectral reflectance. To test whether they can be used in aerial remote platform effectively, in this work a comparison of the sensitivity between several broad-band and red edge-based SVIs to LNC is...

Jiangxi Province boasts the second-highest forest coverage in China. Its forests play a crucial role providing essential ecosystem services and maintaining ecological health of region. High-resolution high-precision mapping are significant timely accurate monitoring dynamic changes to support sustainable management. This study used Sentinel-2 images from four seasons Google Earth Engine (GEE) p...

BACKGROUND Prone breast positioning reduces skin reaction and heart and lung dose, but may also reduce radiation dose to axillary lymph nodes (ALNs). METHODS Women with early stage breast cancer treated with whole breast irradiation (WBI) in the prone position were identified. Patients treated in the supine position were matched for treating physician, laterality, and fractionation. Ipsilater...