Talk at NOG2017

I gave today a talk on one possible way of using R package ‘ooacquire’. I used for the presentation a video with programmed pauses. The pauses are missing from this exported MP4 video file.

ooacquire 0.1.2

This is the second release of package ‘ooacquire’. It is an important update as it include bug fixes and enhancements which have some (minor) effect on the calculated spectral values. The update also removes some spurious warnings and has additional documentation, although not yet in final form.This package allows the acquisition of spectral data from spectrometers from Ocean Optics connected through the OmniDriver run-time, which is available at no cost from Ocean Optics. The current version implements several corrections and measuring protocols unavailable elsewhere in a single modular framework. Some of these cannot be used off-the-shelf as they require the characterisation and calibration of each individual spectrometer, so as to obtain usable values for constants. However, once these constants are available they can be passed as data arguments without need to modify the package itself. Functions are provided for spectral irradiance, spectral transmittance and spectral reflectance measurements. As transmittance and reflectance measurements are normally done relative to reference objects the calibration requirements are less involved than for spectral irradiance.

The package is available through r4photobiology repository.

Please raise issues concerning bugs or enhancements to this package through Bitbucket at https://bitbucket.org/aphalo/ooacquire/issues

A manuscript from 1987

Yesterday I found a copy of one of the first manuscripts I ever submitted. It was never published, so it is time for it to be made available. Ideas discussed are nowadays common place. The manuscript, I think, is still mostly valid almost 30 years after I wrote it… I should have tried harder to get it published then.

Click on the image to read the full manuscript.