{"id":86,"date":"2017-10-02T23:04:13","date_gmt":"2017-10-02T23:04:13","guid":{"rendered":"http:\/\/www.juansequeda.com\/blog\/?p=86"},"modified":"2017-10-02T23:04:13","modified_gmt":"2017-10-02T23:04:13","slug":"a-summer-of-computer-science-research-semantic-web-databases-graphs-and-travel","status":"publish","type":"post","link":"https:\/\/www.juansequeda.com\/blog\/2017\/10\/02\/a-summer-of-computer-science-research-semantic-web-databases-graphs-and-travel\/","title":{"rendered":"A Summer of Computer Science, Research, Semantic Web, Databases, Graphs and Travel!"},"content":{"rendered":"
This has been a summer of Computer Science, Research, Semantic Web, Databases, Graphs and a lot of travel!\u00a0In these past 4 months, I visited 10 countries and traveled over 72,000 miles; equivalent to going around the world 3 times. Whew! This is the summary of my summer travel.\u00a0<\/span><\/p>\n
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Montevideo<\/h5>\n
I attended the 11th Alberto Mendelezon Workshop on Foundations of Data Management<\/a>. AMW is a scientific event with with a heavy attendance from database theory researchers. The hallway discussions are very insightful.\u00a0I was the organizer of the Summer School<\/a>\u00a0and a presented a short paper titled \u201cOntology Based Data Access: Where do the Ontologies and Mappings\u00a0come from?<\/a>\u201dI had a lot of enlightening conversations with Luna Dong<\/a> from Amazon (working on creating the Product Knowledge Graph. Semantic web is involved), Julia Stoyanovich<\/a> who gave a real thought provoking tutorial on Data Responsibility (we should all pay attention to this), Leonid Libkin<\/a> (Nulls in databases are still an issue). I was thrilled to finally meet Dan Suciu<\/a>, James Shanahan<\/a>, Jan Van den Bussche<\/a> among many other database gurus. It\u2019s always a pleasure to hang out with the chilean database \u201cmafia\u201d: Marcelo Arenas, Pablo Barcelo, Leo Bertossi, Claudio Gutierrez, Aidan Hogan et al. Congrats to the local team for organizing a wonderful event, specially to Mariano Consens!<\/div>\n
Buenos Aires<\/h5>\n
I flew into Montevideo and I was flying out from Buenos Aires. I got to spend a day and a half in this great city. I truly enjoyed it. I will have to come back! Blog post about my 36 hour visit to Buenos Aires will come soon.<\/div>\n
San Francisco<\/h5>\n
I attended Graph Day<\/a> where I had two talks \u201cDo I need a Graph Database? If so, what kind?\u201d and \u201cGraph Query Language Task Force Update from LDBC\u201d. My takeaways:<\/div>\n
– AWS is figuring out what to do with Graphs<\/div>\n

– Uber is creating a Knowledge Graph
\n– Stardog, was the only RDF graph database company there. They are growing and very direct with their material: if you are doing data integration, you should be using RDF.
\n– Multi-model databases are growing: Datastaxs, ArangoDB, OrientDB, and Microsoft\u2019s latest release of CosmosDB
\n– New Graph databases: JanusGraph, Dgraph, AgensGraph
\n– openCypher is really pushing hard to be THE property graph query language standard<\/p>\n

Germany<\/h5>\n
I attended the Dagstuhl Seminar \u201cFederated Semantic Data Management<\/a>\u201d, organized by Johann-Christoph Freytag<\/a>, Olaf Hartig<\/a> and Maria Esther Vidal<\/a>. On my way to Dagstuhl, I had the opportunity to stop in Koblenz to hang out with Steffen Staab<\/a>.<\/div>\n
<\/div>\n
We had extensive discussions on the state of the art in Federated Query Processing from the traditional Relational Databases and Semantic Web perspectives. The goal was to understand the limitations of current approaches in considering ontological knowledge during federated query processing. Federated Semantic Data Management (FSDM) can be summarized in one sentence:\u00a0Being able to do 1) reasoning\/inferencing over 2) unbounded\/unknown sources.<\/em> A couple interesting open\u00a0challenges to highlight are the following:<\/div>\n
1)\u00a0Unbounded sources: In traditional federated data management, the number of sources is fixed. In FSDM, the number of sources may not be known. Therefore the source selection problem is harder.<\/div>\n
2) Correctness: A relaxed version of correctness may need to be considered, a tradeoff between soundness\/completeness and precision\/recall.<\/div>\n
3) Access control: This is still an open challenge even in traditional federated data management.<\/div>\n
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Switzerland<\/h5>\n
This is my\u00a0third\u00a0home. I try to swing by Zurich once a year. I spent a weekend at Bodensee and visited for the\u00a0first\u00a0time S\u00e4ntis.\u00a0I had the opportunity to visited Philippe Cudr\u00e9-Mauroux<\/a>\u00a0at the University of\u00a0Fribourg.\u00a0We are the ISWC 2017 In-Use<\/a> PC Chairs, so we had a face-to-face PC meeting. I also gave my talk\u00a0\u201cIntegrating Relational Databases with the Semantic Web: past, present and future\u201d for the first time. This talk is an 1 hour version of my upcoming lecture at the Reasoning Web Summer School in London.<\/div>\n
Lisbon<\/h5>\n
What\u2019s the best way to get from Zurich to London? Stopping for an entire day in Lisbon of course! Specially when you pay for the ticket with miles and $10USD. This was my first time in Lisbon. I arrived early morning, spent 6 hours walking around this amazing city. I also had the chance to have lunch with Sofia Pinto<\/a>\u00a0overlooking Lisbon and discuss ontology engineering! One of the best day layovers I have ever had. I have to come back. Blog post on the visit soon.<\/div>\n
London<\/h5>\n
I was invited to be a lecturer of the 13th Reasoning Web Summer School (RW 2017)<\/a>. I delivered a half day lecture on Integrating Relational Databases with the Semantic Web<\/a>. My lecture notes appear as a book chapter in the book Reasoning Web. Semantic Interoperability on the Web<\/a>. It was great hanging out with good friends Axel Polleres<\/a>, Andrea Cali<\/a>. I finally got to meet for the first time Giorgos Stamou<\/a>. Great conversations with Domenico Lembo<\/a> on Ontology Based Data Access and Leo Bertossi<\/a> on Inconsistent Databases and Data Quality. The highlight of this visit, and of my summer, was the conference dinner at the Royal Society where I sat next to Keith Clark<\/a> and enjoyed a marvelous dinner speech by Bob Kowalski<\/a>. Blog post on this event soon.<\/div>\n
Toronto<\/h5>\n
Client work took my all the way to Toronto. First time in Canada! So if it\u2019s hot in Texas, might as well try to spend time in a cooler place. This is a great weekend getaway destination (in the summer): fantastic views, food and beer. I also had the chance to meet up with Mariano Consens<\/a> and get a tour of the University of Toronto.<\/div>\n
Chile<\/h5>\n
The Graph Query Language task force from the Linked Data Benchmark Council<\/a> (LDBC) organized a face-to-face week meeting in Santiago, Chile to work on the proposal for a closed graph query languages where paths are first class citizens. A full week of hard work (we also had fun). I took advantage of this visit to visit my UT friends Lindsey Carte, Alvaro Quezada-Hofflinger and Marcelo Somos, professors at the Universidad de La Frontera\u00a0in Temuco. I gave a talk in spanish \u201cIntegrating Data using the Semantic Web: The Constitute Use Case\u201d<\/a>. It is enjoyable challenge to give talks to non-computer scientists.<\/div>\n
Miami<\/h5>\n
Back in February I found a Austin-Miami roundtrip ticket for $110. So why not! We\u00a0discovered\u00a0the Barrel of the Monks<\/a>\u00a0brewery\u00a0in Boca Raton. This is a must if you are in that area and you like belgium beers!<\/div>\n
Greece<\/h5>\n
I was invited to attend the STI Summit<\/a> in Crete. My first time in Crete, and in Greece (I have never\u00a0attended ESWC which is usually in Crete). Very intense couple of days talking about the future of Semantic Web research. Afterwards I visited Irini Fundulaki<\/a> at FORTH and Giorgos Stamou<\/a> at the National Technical University of Athens where I gave my talk on Integrating Relational Databases with the Semantic Web. I was very impressed with all the work on mappings that has been done in both of these groups. In both cases, the one hour talk turned into hours and hours of fruitful discussions.\u00a0On my flight to Athens I met a fellow travel geek:72hrJetsettergirl<\/a>. The next day, we randomly bumped into each other at the Acropolis. The sweet coincidences of life!<\/div>\n
Atlanta<\/h5>\n
I attended the ACM Richard Tapia Celebration of Diversity in Computing<\/a>. I have been attending this conference for 10 years, since I was a senior in college, all throughout my graduate studies and now has a PhD. This year, I was the Workshop and Panel Chair. \u00a0I had the chance to moderated a panel \u201cFrom Research to Startup\u201d with Rachel Miller<\/a> from Asana (from theory\/crypto research to startup), Kunle Olukotun<\/a>,\u00a0(Stanford professor and\u00a0founder\u00a0of multiple startups) and Andy Konwinski<\/a> (PhD from UC Berkley and co-founder Databricks). I also was on another entrepreneur panel with Ayana Howard<\/a> (Professor at Georgia Tech and\u00a0founder of\u00a0Zyrobotics<\/a>)\u00a0and Jamika Burge<\/a>. Both panels had a mix of undergrad, grad students and even faculty interested in\u00a0learning\u00a0and entrepreneur experiences. We definitely had an amazing group of panelists. Kemafor Anyanwu Ogan<\/a>\u00a0invited me to be on her panel of Data Management for IoT. One of the highlights of the conference is\u00a0to\u00a0meet with former and new members of Hispanics in Computing<\/a> including Manuel P\u00e9rez Qui\u00f1ones<\/a> (congrats on the Richard A. Tapia Achievement Award for Scientific Scholarship, Civic Science and Diversifying Computing!) and Dan Garcia<\/a>. We missed you Jose Morales and Patti Ordonez!<\/div>\n
Netherlands<\/h5>\n
I\u2019m writing this post on my way back from Amsterdam. I had the opportunity to meet up with Peter Boncz<\/a> and talk about Graph Query Language use cases. I also gave my talk \u201cIntegrating Relational Databases with the Semantic Web\u201d at the VU Weekly Artificial Intelligence meeting. Great crowd and a lot of great questions. Nice seeing Frank van Harmelen<\/a> and Javier Fernandez<\/a>.<\/div>\n
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\n<\/div>\n
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The summer is well over. Fall is already in full force in Europe. But it is still feels like summer in Texas.<\/div>\n
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<\/div>\n","protected":false},"excerpt":{"rendered":"

This has been a summer of Computer Science, Research, Semantic Web, Databases, Graphs and a lot of travel!\u00a0In these past 4 months, I visited 10 countries and traveled over 72,000 miles; equivalent to going around the world 3 times. Whew! This is the summary of my summer travel.\u00a0 Montevideo I attended the 11th Alberto Mendelezon … <\/p>\n

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