Archive for the ‘visualization’ Category

WebSci ’17

August 14th, 2017

The Web Science Conference was hosted by Rensselaer Polytechnic Institute this year. The Tetherless World Constellation was heavily involved in organizing the event and ensuring the conference ran smoothly.The venue for the conference was the Franklin Plaza in downtown Troy. It was a great venue, with a beautiful rooftop.

On 25th June, there were a set of workshops organized for the attendees. I was a student volunteer at the “Algorithm Mediated Online Information Access (AMOIA)” workshop. We started the day off with a set of talks. The common theme for these talks were to reduce the bias in services we use online. We then spent the next few hours in a discussion on the “Role of recommendation algorithms in online hoaxes and fake news.”

Prof. Peter Fox and Prof Deborah McGuinness, who were the Main Conference Chairs, kicked off the Conference on 26th June. Steffen Staab gave his keynote talk on “The Web We Want“.  After the keynote talk, we jumped right into a series of talks. A few topics caught my attention during each session. Venkata Rama Kiran Garimella’s talk on “The Effect of Collective Attention on Controversial Debates on Social Media” was very interesting, as was the talk on “Recommendations for groups in location-based social networks” by Fred Ayala. We ended the talks with a Panel disscussion on “The ethics of doing Web Science”. After the panel discussions, we headed to the roof for some dinner and the Web Science Poster Session. There were plenty of Posters at the session. Congrui Li and Spencer Norris from TWC presented their work at the poster session.


27th of June was the day of the conference I was most looking forward to, since they had a session on “Networks : Structure, Identifiers, Search”. I found all the talk presented here very fascinating and useful. Particularly the talk “Herirachichal Change Point Detection” and “Adaptive Edge Probing” by Yu Wang and Sucheta Soundarajan respectively. I plan to use the work they presented in one of my current research projects. At the end of the day on 27th June, the award for the papers and posters were presented. Helena Webb won the best paper award. She presented her work on “The ethical challenges of publishing Twitter data for research dissemination”. Venkata Garimella won the best student paper award. Tetherless’ own Spencer Norris won the best poster award.

On 28th June, we started the day of by giving a set of talks on the topic chosen for the Hackthon, “Network Analysis for Non-Social Data”. Here I presented my work on how Network Analysis techniques can be leveraged and applied in the field of Earth Science. After these talk, the hackathon presentations were made by the participants. At lunch , Ahmed Eliesh from TWC won first place in the Hackathon. After lunch, we had the last 2 sessions at WebSci ’17. In these talks, Shawn Jones’ talk present Yasmin Alnomany’s work on “Generating Stories from Archived Collections” and Helena Webb’s best paper winning talk on “The ethical challenges of publishing Twitter data for research dissemination” piqued my interest.

Overall, attending the web science conference was a very valuable experience for me. There was plenty to learn, lots of networking opportunities and a generally jovial atmosphere around the conference. Here’s Looking forward to the next year’s conference in Amsterdam.



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Historic launch of the Global Partnership for Sustainable Development Data

September 30th, 2015

An information email in early September from Simon Hodson, the CODATA Executive Director, attracted my deep interest. His email was about the high-level political launch for the Global Partnership for Sustainable Development Data. I was interested because I have worked on Open Data in the past few years and the experience shows that Open Data much more comprehensive than a sole technical issue. I was excited to see that there will be such an event initiated by political partners and focusing on social impacts. And thanks to the support from the CODATA Early Career Data Professionals Working Group, which made it possible for me to head to New York City to attend the forum in person on September 28th.

The forum was held in the Jade Room of the Waldorf Astoria hotel, and lasted for three hours from 2 to 5PM, with a tight but well-organized schedule of about 10 lightning talks, four panels and about 30 commitment introductions from the partners. The panels and lightning talks focused on why open data is needed, how to make data open and, especially, what and the value of open data for The 17 Global Goals for Sustainable Development and the social impact that the data can generate. I was happy to see that the successful stories of open geospatial data were mentioned several times in the lightening talks and the panels. For example, delegates from the World Resources Institute presented the Global Forest Watch-Fires (GFW-Fires), which provides near-real time information from various resources that can enable people to take prompt response before the fire be out of control. During the partner introductions, I heard more exciting news about the actions that the stakeholders in governments, academia, industry and non-profit organizations are going to take actions to support the joint efforts of the Global Partnership for Sustainable Development Data. For example, the Children’s Investment Fund Foundation will invest $20m to improve data on coverage of nutrition interventions and other key indicators by 2020 in several countries; the DigitalGlobe commits to provide three countries with evaluation licenses to their BaseMap service as well as training sessions for human resources; the Planet Labs commits $60 million in geospatial imagery to support the global community; and the William and flora Hewlett Foundation is proposing to commit about $3m to the start-up support of the secretariat for a Global Partnership for Sustainable Development Data. A list of the current partners is accessible on the partnership’s website.

The Global Partnership for Sustainable Development Data has a long-term vision for the year 2030: A world in which everyone is able to engage in solving the world’s greatest problems by (1) Effectively Using Data and (2) Fostering Trust and Accountability in the Sharing of Data. The pioneering partners in this effort have already committed to deliver more than 100 data driven projects worldwide to pave the pathway for the vision 2030. For the first year, the partnership will work together to achieve these goals: (1) Improve the Effective Use of Data, (2) Fill Key Data Gaps, (3) Expand Data Literacy and Capacity, (4) Increase Openness and leverage of Existing Data, and (5) Mobilize Political Will and Resources.

The forum was chaired by Prof. Sanjeev Khagram, with over 200 attendees from various backgrounds. During the reception time after the forum, I had a brief chat with Prof. Khagram about CODATA and also the Early Career Data Professionals Working Group, as well as the potential collaborations. He informed me that the partnership is open and invites broad participation to address the sustainable development goals. Prof. Khagram also mentioned that a bigger event, the World Data Forum, will take place in 2016. I also had the opportunity to catch up with Dr. Bob Chen from CIESIN, Columbia University about recent activities. It seems that ‘climate change’ is the topic of focus for several conferences in the year 2015, such as the International Scientific Conference, the Research Data Alliance Sixth Plenary Meeting and the United Nations Climate Change Conference, and Paris is the city for all these three events.

The report A World That Counts: Mobilising The Data Revolution for Sustainable Development, prepared by the United Nation Secretary-General’s Independent Expert Advisory Group on a Data Revolution for Sustainable Development, provides more background information about the Global Partnership for Sustainable Development Data.

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Open Source Software & Science Reproducibility

January 14th, 2014

This year my contribution to the AGU fall meeting 2013 was all about the development of Open Source Software to enable the reproducibility of scientific products, with both a Poster and an Oral presentation. The AGU was the perfect opportunity to share my ideas on a topic that is one of my main interests.

This was my 2nd time at AGU, but my first time with an oral presentation which turned in a real challenge!

The main issue was a combination of 2 factors : I had decided to generate the slideshow in realtime as HTML from an online IPython Notebook. I thought it would be cool to show this functionality, as well as the work itself. Unfortunately, I was dependent on an internet connection at the time of the presentation, but alas, at AGU the presenter computer doesn’t have internet connection! Definitely not the best conditions for a web based slideshow generated “on-the-fly” by the execution of an IPython Notebook.

I found out about the lack of connectivity only 2 days before my presentation. I must have misunderstood the AGU oral presentation guidelines, but when I didn’t find an explicit mention of the lack of an internet connection, I took it for granted that that wouldn’t be an issue. Big mistake!

I decided it would be safer to prepare a power-point presentation, and some time later, I had one. Deep breath; I would be safe. But… what a disappointment !

I was so excited about the idea of showing my work running in realtime instead of showing a static (somewhat boring) ppt  presentation!!!

I kept thinking about alternative solutions, though, and an idea quickly came to me. If the lack of internet stands in the way of an interactive, realtime demo there should be no problem in running a static HTML slideshows instead; at least that is what I thought …

I used the IPython “nbconvert” utility and its “convert to slide” option, and I successfully converted my workflow from an interactive IPython notebook running in slideshow mode to a static HTML5 slideshows, yeah! The audience wouldn’t get to see how this was done, but at least they would get to see the result.

Happy with the final HTML presentation I finally went to the “AGU’s Speaker Ready Room” to upload and test my presentation. Unfortunately, my HTML presentation would not run offline. The lack of internet was giving me troubles with missing JavaScript files, missing fonts, images-urls to be replaced with path to static files, broken hyperlinks etc … it was not as easy as I thought.

It took more than 3 hours to fix all the bugs on account of a really slow internet connection running from my phone, but finally i got my presentation perfectly  running off line on the AGU computers !

In the end, my talk ran very smoothly. A complete workflow for “catchments characterization” using exclusively open source software, running online and fully reproducible thanks to the use of open source software and an open dataset! I felt really good, as I think I successfully got my message across, both in words and in actions.

To top it all off, my presentation came just at the right time. Before me, two other presentations during my session had mentioned the use of the IPython Notebook as open source software tool to enable reproducibility of scientific work. They had highlighted that it shows great potential and that it deserves further investigation. I think my presentation gave them even more proof of that! Even the chairman acknowledged this when he stated: “Before we heard about it, but now we saw it in action!” I felt very proud of what I had done. The effort I put into running the HTML slideshow definitely paid off!!!


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Three reasons to attend ESIP winter meeting

January 15th, 2013

Erin Robinson has posted 10 reasons to attend the ESIP winter meeting. I want to provide some feed-backs from the point of view of myself.

Interaction: ESIP meetings are different from a normal conference with sessions of presentation and Q/A. Its sessions are more like break-outs and workshops and require interactions from the audience.

Topics: ESIP meetings cover various topics standing in the fore-front of geo-informatics, cyberinfrastructure and semantic web. It is easy to find a session or poster that could be of interest to you.

Location: Normally the ESIP winter meeting will be held at Washington DC. It’s a city full of museums, good food and other interesting stuff. Take a short visit during the meeting time!

I want to share a image which combines a part of my ESIP 2013 winter meeting poster and a photo taken at the National Museum of Natural History (they share a common topic of geologic time scale).


An additional information is for students in the field of semantics and/or geoinformatics. You may apply the Rob Raskin scholarship.

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Survival and thriving at AGU Fall Meeting 2012

December 11th, 2012

AGU Fall Meeting, if I am correct, is the biggest conference in the field of geosciences. For the year 2012 there were over 22000 people participated in the event. Yet, a conference is more than the number of attendees. AGU is not a single combination of a number of academic meeting sessions. There are various workshops, seminars, town halls, exhibitions and social activities together with it.
I once read an article written by the president of UNISCO (two years ago?), in which it is mentioned that the number of earth scientists across the world is about 440000. This is a tiny number comparing with the global population. While approaching San Francisco and Moscone Center, the city and venue of AGU, I could feel the number of earth scientists around me is increasing sharply. Especially along the 4th street to Moscone Center, what one can see during the AGU week should be called a deluge of earth scientists. Personally, I had an interesting feeling – am I driven by the deluge, or I am a part of it?
Back to the conference itself, it is a big conference so I (1) focused on sessions in the division of Earth and Space Science Informatics (ESSI), and prepared my personal schedule for posters and presentations I was interested. I also set (2) in-person meetings with people with whom we want to discuss some issues related to the research projects DCO-DS and GCIS-IMSAP at TW. There were (3) a number of other workshops and activities together with AGU, such as the workshop of Data Management 101 for Early Career Scientists, the workshop about NSF system, the ESSI reception, the Ignite Talk, etc. Some of them cannot be easily found on the AGU web site, but are informed through different channels. Many thanks to people in those email lists (e.g., AGU-ESSI, ESIP-SW) I joined for sending me the messages.
I gave two presentations on Friday: a poster for the modeling works in the GCIS-IMSAP project (Jin is first author), and an oral presentation on the exploratory visualization of earth science data with semantic web technologies. For the first one, David Arctur suggested that we may bring some geospatial components into the model framework. Stephan discussed that if we use GCMD keywords for GCIS, then in the GCMD keywords there is a part of it is for geospatial descriptions. While I was introducing the searching function in our plan for the GCIS-IMSAP project, Deana Pennington suggested we may also consider the user tag functions, that is, a reader can create tags in the NCA report for further use, while this may also be supported by some Semantic Web technologies. I also discussed the GCMD keywords with Tyler Stevens, a researcher in the GCMD keywords, on how to make GCMD keywords more open for use. He likes our feedback and already provided some information.
My oral presentation was based on some work originated from my PhD study. This work used datasets on the server of the British Geological Survey. I got some updates from Timothy McCormick, the Information Sector Manager (Geology) at BGS, on their Linked Data works of lithology. He suggested me to do some further work using their datasets and services. Luis Bermudez and David Arctur from Open Geospatial Consortium (OGC) suggested me to do more work on semantic web and Web Feature Service (WFS) and Sensor Web, and they suggested TW to obtain a membership at OGC to get fresh first-hand progress of OGC works.
AGU is a big event, a schedule is necessary, as those described above. And, there are also many other interesting side-events. Almost every day I crossed by some old friends, for some of them I had lost contact for more than seven years! The exhibit is great and I collected a bag of earth and space science cards, posters and toys for my son – is he going to be an earth scientist?
There is more to say about a seven-day conference with over 22000 participants. I have to stop here. For those issues related to specific research topics and projects at TW we will have further discussion in the separate groups soon.

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