ABSTRACT Computer vision systems combined with machine learning techniques have demonstrated success as alternatives to empirical methods for classification and selection. This study aimed classify tomatoes based on their colorimetric characteristics, which influence consumer purchasing potential, using the decision tree algorithm. Tomatoes were categorized into two classes ripeness: Higher Purchasing Potential (20 fruits) Lower (40 fruits). Images captured in RGB color model converted HSI...

Biospeckle laser technique has become an important tool to investigate biological activity in several areas of science. However, due the complexity materials it is necessary develop research processes that ensure greater efficiency isolating different activities same material using biospeckle. Thus, alternative techniques, such as those related spectral domain, allow approaches provide a means for frequency and isolation marking various observed phenomena. The possibility creating markers...

<abstract> <bold>Abstract.</bold> Estimated soybean yields at 13% moisture ranged from 2663 to 4861 kg/ha. Pre-harvest losses 1.0 13.6 kg/ ha. Total combine 47.4 260.5 kg/ha (1.2 5.5% of yield). The headers were the largest contributors with 31 247 Shatter primary cause in and they increase markedly as harvest moistures decreased below 13%. A reduction ground speed would have enabled cutterbars run closer reduce stubble losses. An achievable 2 bags/ ha has an operator hourly value U.S. $238...

<abstract> <bold><sc>Abstract. </sc></bold>Harvest losses were determined for combines harvesting soybeans and corn in Brazil. Estimated soybean yields adjusted to 13% moisture ranged from 2663 4861 kg/ha. Pre-harvest 1.0 13.6 Total combine 47.4 260.5 kg/ha (1.2% 5.5% of yield). The headers the largest contributors with 31 247 Shatter primary cause they increased markedly as harvest moistures decreased below 13%. A reduction ground speed would have enabled cutterbars run closer reduce...

ABSTRACT Knowing the maturation of Acrocomia aculeata (macaw palm) fruit is decisive for harvest to be performed when has a higher content and quality oil. There are different approaches monitor they can classified as destructive non-destructive. Variables obtained by optical instruments have been used determine stage. The present study evaluated relationship between biological activity measured technique biospeckle laser firmness, in pulp 41st 61st week after flowering. was quantified...

ABSTRACT The macaw palm crop has been studied because of its bioenergy potential due to the high oil yield, which is linked fruit maturity stage. Digital images have adopted as a contactless way obtain information about surface area and volume, acting sensor for quality control classification fruits, based on physical aspects during maturation aim this study was estimate volume fruits from digital models obtained by Moiré technique using only one camera, associated with image-processing...

ABSTRACT Results of evaluations using optical evaluation methods may be correlated with tomato quality and maturation. In this context, the objective study was to evaluated correlation between colorimetric physico-chemical variables, clustering them as a function maturation stages, multivariate analysis. The experiment conducted 150 fruits three stages (immature, light red mature). variables were through traditional methods. assessed on images in RGB color model taken digital camera....

Matopiba region is considered the main agricultural frontier in Brazil currently, with expansion of areas suitable for activities intensifying since 2000s, causing changes land use and cover (LULC) region. This study aimed to analyze LULC from 1985 2020 identify spatial dynamics that occurred activities. To assess LULC, scenarios obtained Mapbiomas database between were used. The area was divided into pre-established classes by Mapbiomas, including Agriculture class. dynamic modeling these...

Monitoring the spatial variability of soil attributes is an important tool in crop management. Multivariate statistical methods and geostatistics were jointly applied to evaluate influence different on soil. The aim this research was apply multivariate principal component analysis map area subjected conservation management identify most relevant physical chemical attributes. Disturbed undisturbed samples collected georeferenced at 99 points study depths 0.00 - 0.10 m 0.20 measure soil; (PC)...

Macaw palm (Acrocomia aculeata) is a promising crop for biofuel production due to the high concentration of its fruit oil, but harvest date an issue be better understood so it could cultivated on industrial scale. The aim this study was use colorimetric properties macaw fruits develop neural network classifier determine ideal moment harvesting, based oil content mesocarp. During nine weeks maturation were sampled 900 and RGB, HSI CIELab color models used classify into immature mature fruits....

Coffee growers who produce the robusta species (Conilon) have sought to increase productivity and drink quality by improving production techniques. Artificial vision systems can assist in increasing efficiency of operations associated with crop management. This study aimed obtain colorimetric characteristics coffee fruits at different stages maturity use them for classifying from digital images. A camera spectral resolution visible was used acquire images 60 samples green, cherry, over-ripe...

ABSTRACT Coffee quality is an essential aspect to increase its commercial value and for the Brazilian coffee business remain prominent in world market. Fruit maturity stage at harvest important factor that affects of product. Therefore, objective this study was develop a classifier using neural networks distinguish green fruits from mature fruits, based on detachment force. force percentage were measured during 75-day window. Collections carried out biweekly, resulting five different moments...

Apos a decada de 70, no Brasil, houve uma grande migracao da populacao do campo para cidade, resultando em um crescimento exponencial dos centros urbanos. Este processo urbanizacao acelerado e nao planejado resultou mudancas nas condicoes naturais das bacias hidrograficas, diminuindo permeabilidade dessas areas, havendo assim, reducao na infiltracao agua precipitada, acarretando aumento acentuado escoamento superficial aguas pluviais gerando inumeros problemas ambientais como inundacoes...

ABSTRACT Onion production is an agricultural activity whose yield associated with environmental, market and cultural management factors. The objective of this study was to evaluate the cost onion as a function tillage system adopted soil water content at moment operations. Three systems were evaluated: P1 - one plowing + two harrowings seedbed raising operations; P2 operation; P3 harrowing four contents: 12, 15, 23 26%, in experiment conducted Tourão irrigated perimeter, Juazeiro, BA, Brazil...

Adjoint methods integrated with computational fluid dynamics (CFD) tools can be used to tackle geometric optimization in processes and equipment an industrial environment. This work presents a workflow for on typical pipe elbow geometry using adjoint–CFD methodology. It uses the ANSYS Fluent CFD discrete adjoint solver stepwise way guide shape modification decrease pressure drop. Finally, it discusses effect of optimized configuration predictions three well-known erosion models. For majority...

Bulk transportation of tomatoes is a step with high occurrence mechanical impacts, leading to increased losses and reduction in the quality fruits arriving at industry reaching consumer market. The present study aimed evaluate variations physical-chemical parameters associated tomato fruits, occurred during bulk transportation, using an approach based on principal component analysis. experiment was conducted municipality Morrinhos - Goiás, Brazil. Firmness, titratable acidity, total soluble...

O entendimento e conhecimento das características operacionais de conjuntos mecanizados se tornou uma preocupação cada vez mais frequente na agricultura moderna. Por conta do alto valor agregado, conhecer a viabilidade econômica dos custos produção é essencial, pois são diretamente afetados pelo desempenho operacional máquinas agrícolas envolvidas. Objetivou-se avaliar o determinar os nos diferentes feno Tifton 85 (Cynodon spp.). experimento foi conduzido fazenda Feno Rio, localizada no...

ABSTRACT Computer vision systems can be an alternative to traditional methods of analyzing the quality forage crops, allowing instantaneous, non-destructive monitoring crop, with cost reduction. This study aimed evaluate parameters Tifton 85 (Cynodon spp.) using digital images, relating spectral indices this forage. In experimental area, four levels nitrogen fertilization were applied and analyses made at different times after standardization cut (14, 28, 42, 56 days). The evaluated mineral...

A aplicação dos fitossanitários é realizada por pulverizadores, que podem ser do tipo costal. Normalmente, a cultura quiabeiro instalada em menor área agricultores familiares e utilização desse equipamento de traz resultados positivos para o agricultor no campo. Os pulverizadores costais possuir acionamento manual, motorizado ou elétrico. O (Abelmoschus esculentus L.) uma hortaliça grande valor nutricional bem aceita mercado brasileiro. objetivo desta pesquisa foi verificar qualidade na...