News from our academic members

If you are a member of UV4Plants and would like to have your blog updates featured on this page, please send the URL address to the webmaster with a short description of what you write about.

R for photobiology (Pedro J. Aphalo)

photobiology 0.9.17.9003
2017-11-23
The main changes from version 0.9.17, the current CRAN release, are: Add functions add_attr2tb(), when_measured2tb(), lon2tb(), lat2tb(), geocode2tb() and what_measured2tb(). Add a formal parameter "attr2tb" to all summary methods for collections of spectra, used to automatically call add_attr2tb() to add attributes to their output. Add calibration […]
Pedro J. Aphalo
ggspectra 0.2.2.9002
2017-11-23
The changes from version 0.2.2, the current CRAN release, are: Track changes in package ‘photobiology’ 0.9.17.9003: Add plot.calibration_spct() Add ggplot.calibration_spct() Enhance handling of plot titles: Add utility function ggtitle_spct() Update all plot() methods to allow flexible contents in automatic titles including setting of the time zone used for […]
Pedro J. Aphalo
ggpmisc 0.2.16.9003 (test release)
2017-11-13
This is an incremental update meanwhile waiting for the release of ‘ggplot2’ 2.2.2. The differences compared to ‘ggpmisc’ 0.2.16.9002 are: A bug in statistic stat_quadrat_counts() was fixed. It was causing labels to be occasionally wrongly placed. Statistic stat_quadrat_counts() can now also count the number of observations in pairs of quadrats of a plot, … […]
Pedro J. Aphalo

SenPEP (Pedro J. Aphalo)

Article titles in the era of the internet
2017-11-24
A currently ongoing surprising event affecting what I considered one of my least important articles (https://doi.org/10.19232/uv4pb.2016.1.92), has made me rethink how search engines and the internet affect the impact of publications. Among web site developers “SEO” is considered a very … Continue reading → […]
Pedro J Aphalo
Slides from my talk at the University of Alberta
2017-11-24
This is an updated version of the talk that I delivered at the UV4Plants conference in Pécs, earlier posted in this blog. […]
Pedro J Aphalo

CanSEE (T. Matthew Robson)

Masters Student Projects at ViPS Science Fair
2017-10-17
On the 10th October we participated in the ViPS Science Fair where researchers could come along and find out about our research in the CanSEE group as well as the rest of the Viikki Plant Science Centre. If you are … Continue reading → […]
Matt
Plants and Climate Change
2017-10-17
From 15-21st September we organised an international course in Plants and Climate Change for the DPPS at the University of Helsinki, with invited speakers giving us the benefit of their expertise over the course of the week. A diverse group … Continue reading → […]
Matt
30 Years since the Montreal Protocol
2017-10-17
I was very lucky to be in Stratford-upon-Avon, helping to write the latest UNEP report on the effects of the ozone depletion and related climate change on terrestrial ecosystems, during the 30-year celebrations of the signing of the Montreal Protocol. … Continue reading → […]
Matt
Effects of UV-A and blue light on photodegradation of leaf litter
2017-06-12
Congratulations to Santa Neimane for successfully defending her Bachaelor’s thesis in Plant Physiology at the University of Latvia of Riga:  EFFECT OF LIGHT SPECTRAL QUALITY ON BETULA PENDULA AND FAGUS SYLVATICA LEAF LITTER DECOMPOSITION DURING SENESCENCE. This research was carried … Continue reading → […]
Matt

Photo rumblings (Pedro J. Aphalo)

Black anodised aluminium in IR
2017-12-11
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)
2017-12-11
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
2017-12-03
An on-going Kickstarter campaign offers sophisticated pinholes for digital cameras in an assortment of different lens mounts. […]
Pedro J. Aphalo
Photographs through windows
2017-10-28
When travelling by train, bus or aeroplane we frequently see views that would make great photographs. In the gallery above I display a selection of pictures I have taken through windows while travelling in Finland between May and October 2017. To see them at higher resolution, click on the tiles. Dealing with reflections and the … Continue reading Photograph […]
Pedro J. Aphalo
High dynamic range
2017-10-27
High dynamic range (HDR) is used to refer to photographs which have captured a broader range of luminosity values than what is usual. In most contexts it implies a higher dynamic range than a digital camera sensor can detect between saturation and its noise floor. How can this be achieved? By combining several images so … Continue reading High dynamic range […]
Pedro J. Aphalo

Comments are closed