12 Questions 14 Answers 0 Followers
Questions related from Alexandre Santos
I am looking for an ultrasonic transducer with a frequency range of 40-50 kHz for measuring wood thickness up to 200 mm (not for distance measurement). I need the emitter to send the sound and the...
16 January 2025 6,544 2 View
Dear RG Members, I'd to know is inferences about soil physical properties (water +granulometry) using RGB +NIR spectrometry is possible? Thanks in advanced, ASANTOS
01 November 2017 9,267 3 View
Dear RG Members, I try to analise multivariate infrared spectroscopy using PERMANOVA approach and I've like to know what is better distance matrix eg. mahalanobis, euclidian or other for...
30 September 2017 6,141 3 View
Dear RG Members, I'd like to know if there is any microspectrometer (8000 to 2000 cm-1 wavenumbers) kit or similiar on the market? I need a kind of kit that's combine a spectrometer to...
31 August 2017 643 0 View
Dear Members of RG community, I try to calculate incremental variance explained by variables in multivariate multiple linear regression model, but I don't have Sum of squares parameters like...
04 February 2017 2,782 3 View
Dear Members, I'd like to create a questionnaire for analytic hierarchy process (AHP) in a insecticide study. In my study, each decision maker investigates the values (Saaty fundamental...
30 December 2016 2,546 9 View
I have a pairs contrasts (results$pairs) and descending order p value (results$p) in a data frame: pairs
04 October 2016 6,872 2 View
Dear Members, I'd like to know if there are any paper about chemical characterization of mealybug wax? Thanks, Alexandre
03 October 2016 2,115 3 View
I am looking for a good review about optimal coccinellidae density examples (preferentially exotic lady beetles against indigenous insects), when the purpose is a classical biological control...
17 June 2016 6,103 4 View
I'd like to know why I have negative values in TOA planetary reflectance when my SUN_ELEVATION (SE) is > 50º degrees? Considering θ SZ= Local solar zenith angle: SZ = 90° - θ SE approach gives...
13 June 2016 5,875 3 View
satellite imagery; small scale estimation; satellite sensibility
02 February 2016 6,021 4 View
Methane. I search colorimetric tests like bromide water for methane detection. Does anyone know any?
25 December 2015 9,843 3 View