Periods in the soybean summer cycle that are sensitive to the occurrence of high temperatures were studied. An analysis was performed on the variability of soybean yields associated with crop canopy temperatures during key development periods. A land surface temperature (LST) data series from MODIS (Moderate Resolution Imaging Spectroradiometer) on the Aqua satellite was processed [...]
Estimations of crop area were made based on the temporal profiles of the Enhanced Vegetation Index (EVI) obtained from moderate resolution imaging spectroradiometer (MODIS) images. Evaluation of the ability of the MODIS crop detection algorithm (MCDA) to estimate soybean crop areas was performed for fields in the Mato Grosso state, Brazil. Using the MCDA approach, [...]
The Kinect™ has been developed to recognize gestures and voice commands, through a set of cameras and microphones, respectively. This paper proposes and evaluates low-cost Sound Source Localization (SSL) solution based this off-the-shelf equipment. It consists of employing a pair of Kinect devices as an alternative for microphone array, and executing the Steered Response Power [...]
The present study aimed to develop and implement a method for detection and classification of spectral signatures in point clouds obtained from terrestrial laser scanner in order to identify the presence of different rocks in outcrops and to generate a digital outcrop model. To achieve this objective, a software based on cluster analysis was created, [...]
This paper presents an on-the-fly procedure for obtaining extrinsic camera parameters of onboard vehicular cameras, as well as augmented reality applications for driver assistance systems and road inspection. The proposed approach employs a lane detection algorithm to extract the lane boundaries of the road, and estimates the distance between adjacent lane markings based on the [...]
The current genetic makeup of Latin America has been shaped by a history of extensive admixture between Africans, Europeans and Native Americans, a process taking place within the context of extensive geographic and social stratification. We estimated individual ancestry proportions in a sample of 7,342 subjects ascertained in five countries (Brazil, Chile, Colombia, México and [...]
Earth Science Informatics
In this study we analyze the relationship between the occurrence of high temperatures and the variability of soybean yield. The study covers the crop years from 2003 to 2012 in Rio Grande do Sul State. For the analysis of temperature over the vegetation canopy in agricultural areas, we used a LST (Land Surface Temperature ) [...]
An accurate evaluation of the environment while cities are still growing economically is highly necessary for reliable assessment of ecosystem conditions. This research evaluates a comparison between the pattern of Land Surface Temperature (LST) distribution and Enhanced Vegetation Index 2 (EVI-2) during the summer season as an indicator of development conditions in an Area of [...]
The analysis, description and interpretation of outcrops are mainly based on field activities from which geoscientists can make observations, descriptions and sketches in field books as well as acquisition of digital photographs and different measurements with compass and other equipaments. The development of geotechnologies in the last decade has been crucial in obtaining geological data [...]