News from our academic members

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R for photobiology (Pedro J. Aphalo)

photobiology 0.9.19
The main changes from version 0.9.18, the most recent CRAN release, are:  Fix bug in sun_angles() that resulted in wrong azimuth values returned in some circumstances. (Bug introduced in version 0.9.12 when the astronomy code was overhauled in December 2016.) Fix bug in day_night() that resulted in a small time shift when a … […]
Pedro J. Aphalo
Jan 2018: “Top 40” New Package Picks · R Views
Source: Jan 2018: “Top 40” New Package Picks · R Views ‘photobiologyFilters’ from our R for Photobiology suite made it to the Top 40 New Package picks! Thanks to everybody who has contributed code, data and ideas!!   […]
Pedro J. Aphalo
photobiologySun 0.4.0
The main changes from version 0.3.7, the most recent version are: Group reference spectra into a collection. Rebuild all data objects adding metadata. New vignette. Because of some object name changes this update can break code developed with earlier non-CRAN releases. Documentation web site at NOTE: The upda […]
Pedro J. Aphalo

SenPEP (Pedro J. Aphalo)

Update on: ‘Article titles in the era of the internet’
Exponential growth in read counts continues. As ResearchGate seems to assign subjects to papers based on the subjects in the author’s profile, rather than the paper itself, all sorts of astonishing achievements are being reported for this very modest one-page-long book review… and for myself… Last week’s achievements as example. (It would have been nice if … […]
Pedro J Aphalo
Article titles in the era of the internet
A currently ongoing surprising event affecting what I considered one of my least important articles (, has made me rethink how search engines and the internet affect the impact of publications. Among web site developers “SEO” is considered a very important factor in being successful in “drawing traffic or page reads” […]
Pedro J Aphalo

CanSEE (T. Matthew Robson)

Blue light advances bud burst in branches of three deciduous tree species under short-day conditions
Congratulations to Craig Brelsford on the acceptance of the first publication towards his PhD, which will shortly be published in Trees: Structure and Function.  But in particular, a big thank you to the two reviewers for this article for Trees … Continue reading → […]
Skype a Scientist Q&A: Climate Change with Antonio Serna School Alicante, Spain
Here’s a transcript of some of the best questions in Spanish and translated into English: about research into climate change followed by a discussion of what it’s like working in science. Aquí abajo hay una síntesis de la charla. Cuestiones de carácter técnico (Climate … Continue reading → […]
UNEP EEAP meeting in Malaga to discuss the upcoming assessment
I’m just back from 10-days in Malaga writing and the discussing the content of the upcoming assessment by the UNEP Environmental Effects Assessment Panel (EEAP) for ozone depletion and related climate change. At the end of this year, a comprehensive … Continue reading → […]
Latest UNEP update published
The latest UNEP update from the EEAP (Environmental Effects Assessment Panel) is out today in PPS.  The report summarizes developments during the past 12 months in our understanding of the effects of ozone depletion and climate changes related issues. The … Continue reading → […]

Photo rumblings (Pedro J. Aphalo)

MIDOPT filters
For those interested in photography “beyond the visible”, some of the filters available from Midwest Optical Technologies Inc. under the MIDOPT brand name should be very interesting. They are distributed in European countries by Stemmer AG. Both companies are specialised in the supply of machine vision equipment. What adds additional interest is that filters […]
Pedro J. Aphalo
Timelapse in the “dark”
Infrared (940 nm) The night of a plant, 11 h 20 min condensed into a 10 s-long video. Only source illumination were two LEDs emitting infrared radiation at 940 nm (LED Engin LZ1-10R702). Camera: Olympus E-M1, converted to full spectrum, adapted Soligor 35 mm f:3.5 objective at f:8, Heliopan RG780 long pass filter on lens. … Continue reading Timelapse in the […]
Pedro J. Aphalo
Black anodised aluminium in IR
Many cheap extension tubes, lens adapters and lens hoods are made of aluminium and have a black anodised finish: are they always better than plastic ones? As it was revealed by the macro extension tubes comparison internal reflections can be a problem in visible light and lead to glare and low contrast. These problems are … Continue reading Black anodised al […]
Pedro J. Aphalo
Depth of Field (DOF)
As a followup to the earlier posts on taking photographs through windows and on focus stacking I will list some resources after a brief introduction. There are good explanations on the internet and in many books. There are quite a few apps that can be used in Android and Apple phones to quickly estimate the … Continue reading Depth of Field (DOF) → […]
Pedro J. Aphalo
Pinhole Pro and Pro S
An on-going Kickstarter campaign offers sophisticated pinholes for digital cameras in an assortment of different lens mounts. […]
Pedro J. Aphalo

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