arxiver Dealing with the big data of scientific literature Vanessa Moss and Aidan Hotan

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1 arxiver Dealing with the big data of scientific literature Vanessa Moss and Aidan Hotan 1

2 Why is the literature important? Science is fundamentally built upon previous work - astrophysics is no exception to this It is (currently) the key quantifiable output of an astrophysicist Knowledge of your work s place in a wider field is critical to contextualising its relevance Keeping up to date with the newest advances in astronomy gives you an idea of the general direction of the field 2

3 How has the literature changed? 3 Image credit: Robert Simpson

4 How has the literature changed? Papers are being published at an exponentially increasing rate It is a lot easier to publish now than previously Large collaborations are much more common Job security has become correlated with publication rate Digitalisation of the literature has led to quicker dispersion 4

5 How has the literature changed? 5

6 How has the literature changed? Number of submissions Oct Oct Oct Nov Nov Nov Nov Dec

7 How does arxiver help? Daily papers appearing on astro-ph can be hard to digest We present the meta-data of each paper, reformatted We also include three representative figures from the paper 6

8 How does arxiver help? 7

9 How does arxiver help? 7

10 How does arxiver help? 7

11 How does arxiver help? 7

12 How does arxiver help? 7

13 How does arxiver help? random 7

14 How does arxiver help? 7

15 How does arxiver help? 7

16 How does arxiver help? 7

17 How does arxiver help? 8

18 How does arxiver help? 9

19 How does arxiver help? 10

20 The inner workings of arxiver Scrape new arxiv postings Post using python-wordpress-xmlrpc Download each paper s tar file Pick a selection of figures 11 Find associated images Fourier spectral analysis

21 Selecting representative images How can an automated process decide what most appeals to a wide variety of human viewers? Could apply machine learning with a training data set - This seems overly complicated - Likely to be high variance in the input data (differing opinions) Instead, consider objective information content - Scientific information content is impossible to rate without intelligent interpretation, but we can judge the raw complexity of an image - A perfect opportunity to apply the Fourier transform! 12

22 Figure of merit: spectral occupancy The FT of an image reveals its complexity - Images with smoothly varying components will have simple spectra - Images with sharp edges and point-like features have complex spectra Need to condense the content of a spectrum to one number - Easiest thing is to add amplitudes and normalise by number of pixels - Indicates how much of the spectrum is required to define the image - Also take the log, to compensate for the fact that very compact features otherwise heavily dominate the spectrum Resulting metric bears a strong relation to the smoothness of an image file as judged by eye 13

23 Testing metric on example data 14

24 Testing on real data Nearly all arxiv plots come with axis labels, so there is usually some high-frequency structure Most images tend to be dominated by lines/points However, this means that more photo-like images stand out There is clear differentiation that supports what the eye perceives 15

25 Making a selection Now that we can numerically assess the content of an image in terms of its complexity, how do we select which to display? In order to best characterise a paper, we select extreme cases: - The highest and lowest, and the one closest to the median - If authors include a map of a field and a plot showing the results of their analysis of this field, arxiver should ideally show both This selection method showcases the variety of image content included by the authors 16

26 Making a selection 17

27 Initial response to arxiver 18

28 Current usage of arxiver 19

29 Current usage of arxiver 19

30 Current usage of arxiver 19

31 The role of the arxiver user We see arxiver as a tool for astronomers In order to gauge the current user experience of arxiver, we released an arxiver User Survey This survey had three goals: 1) To determine opinion on showing author names in posts 2) To identify the optimal path for future development 3) To assess the response of astronomers to arxiver Overall we had 158 unique responses from around the world! 20

32 The arxiver user survey 21

33 The question of author names At the start, we chose not to include author names in posts This was done with the goal that arxiver readers could judge each post based on its scientific content, not knowledge of authors (avoiding any unconscious or conscious bias) There are convincing arguments on both sides - avoiding bias, focusing on science - giving credit/exposure, familiarity with authors Part of the arxiver User Survey examined this question 22

34 The question of author names Professor Postdoc Postgraduate student Other Normalised fraction Show names Don t show names Indi erent 23

35 The question of author names Professor Postdoc Postgraduate student Other Normalised fraction All 1st, 2nd and 3rd 1st and 2nd 1st None 24

36 The question of author names Professor Postdoc Postgraduate student Other 0.5 Normalised fraction Under title Bottom of post In link to arxiv In figure names In figure metadata None/other 25

37 Paths for future developments Keywords as tags Latex in abstracts Better figure selection Favourite/save posts Keyboard shortcuts Dedicated server Other Distinguishing types of papers Stock images if none Authors specify plots 26

38 Current experience of arxiver 3 star star star star 27

39 The future of arxiver arxiver is at 24% storage capacity - need to move to a server! The arxiver User Survey results will help us determine what to focus on developing next, as well as the author question There may be potential for future collaboration with other open access scientific data projects in astronomy - arxiv? Fourier spectral occupancy is an effective way to determine the complexity of an image, and may be applicable beyond arxiver In the astroinformatics context, arxiver highlights the importance of considering how information is presented for its consuming audience 28

40 Visit arxiver! Thanks for listening! 29

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