27 Apr 2015

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Guest blog: David Miller – A solar-powered glitter ball rotator

My Dad's always had an interest in tinkering with electronics and the like. Recently he made an interesting thing so I asked him to write it up, and here it is: A few weeks ago my wife and I were invited to join four friends for Sunday lunch. Our host has a south-facing dining room with a glitter ball sitting in the window. We were all entertained by the light beams gradually moving around the walls and ceiling. I suggested that a small solar cell and motor attached to the glitterball might improve the entertainment. I bought these parts from ...

27 Apr 2015 8:48am GMT

25 Apr 2015

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PhD defense: Semantic Resolution Framework for Integrating Manufacturing Service Capability Data

Tweet Ph.D. Dissertation Defense A Semantic Resolution Framework for Integrating Manufacturing Service Capability Data Yan Kang 10:00am Monday 27 April 2015, ITE 217b Building flexible manufacturing supply chains requires availability of interoperable and accurate manufacturing service capability (MSC) information of all supply chain participants. Today, MSC information, which is typically published either on the supplier's web site or registered at an e-marketplace portal, has been shown to fall short of interoperability and accuracy requirements. The issue of interoperability can be addressed by annotating the MSC information using shared ontologies. However, this ontology-based approach faces three main challenges: (1) lack of ...

25 Apr 2015 5:57pm GMT

23 Apr 2015

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AKSW Colloquium, 27-04-2015, Ontotext’s RDF database-as-a-service (DBaaS) via Self-Service Semantic Suite (S4) platform via & Knowledge-Based Trust

This colloquium features two talks. First the Self-Service Semantic Suite (S4) platform is presented by Marin Dimitrov (Ontotext), followed up by Jörg Unbehauens report on Googles effort on using factual correctness as a ranking factor. RDF database-as-a-service (DBaaS) via Self-Service Semantic Suite (S4) platform In this talk Marin Dimitrov (Ontotext) will introduce the RDFdatabase-as-a-service (DBaaS) options for managing RDF data in the Cloud via the Self-Service Semantic Suite (S4) platform. With S4 developers and researchers can instantly get access to fully managed RDF DBaaS, without the need for hardware provisioning, maintenance and operations. Additionally, the S4 platform provides on-demand access ...

23 Apr 2015 3:21pm GMT

22 Apr 2015

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Talk by Kleanthi Georgala

Last week on Friday, 17th April, Kleanthi Georgala visited AKSW and gave a talk entitled "Traces Through Time: Probabilistic Record Linkage - Medieval and Early Modern". More information below. This innovative, multi-disciplinary project will deliver practical analytical tools to support large-scale exploration of big historical datasets. The project aims to bring together international research experience in the digital humanities, natural language processing, information science, data mining and linked data, with large, complex and diverse 'big data' spanning over 500 years of British history. The project's technical outputs will be a methodology and supporting toolkit that identify individuals within and across historical datasets, allowing ...

22 Apr 2015 8:48pm GMT

SAKE Projekt website goes live

Hi all! The project website for the BMWi funded Smart Data Web Project "SAKE" is now on-line at www.sake-projekt.de . It already mentions the first SAKE-related publication by Saleem@AKSW and introduces our partners as well as the industry use cases which we are going to tackle. Check it out and spread the word. And don't forget to follow @SAKE_Projekt on twitter. Simon on behalf of the SAKE team

22 Apr 2015 9:50am GMT

21 Apr 2015

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Thoughts on KOS (Part 2): Classifying Knowledge Organisation Systems

Traditional KOSs include a broad range of system types from term lists to classification systems and thesauri. These organization systems vary in functional purpose and semantic expressivity. Most of these traditional KOSs were developed in a print and library environment. They have been used to control the vocabulary used when indexing and searching a specific product, such as a bibliographic database, or when organizing a physical collection such as a library (Hodge et al. 2000). KOS in the era of the Web With the proliferation the World Wide Web new forms of knowledge organization principles emerged based on hypertextuality, modularity, ...

21 Apr 2015 3:06pm GMT

Quads with a View

The observant user may have noticed, that the controls in our query editor have ever so slightly changed. In particular, the list is no longer titled "Queries". The header is "Views" and each entry has an additional icon: a link.

21 Apr 2015 8:06am GMT

20 Apr 2015

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AKSW Colloquium, 20-04-2015, OWL/DL approaches to improve POS tagging

In this colloquium Markus Ackermann will touch on the ' linguistic gap ' of recent POS tagging endeavours (as perceived by C. Manning, [1]). Building on observations in that paper, potential paths towards more linguistically informed POS tagging are explored: An alternative to the most widely employed ground truth for development and evaluation of POS tagging systems for English will be presented ([2]) and utilization of benefits of a DL-based representation of POS tags for a multi-tool tagging approach will be shown ([3]). Finally, the presenter will give an overview about work in progress with the goal to combine OWL/DL-representation ...

20 Apr 2015 6:21am GMT

Access control for a triplestore linked data fragments interface

Tweet In this week's meeting (10-11am Tue, April 21), Ankur Padia will present work in progress on providing access control to an RDF triple store. Triple store access control for a linked data fragments interface Ankur Padia, UMBC The maturation of Semantic Web standards and associated web-based data representations such as schema.org have made RDF a popular model for representing graph data and semi-structured knowledge. Triple stores are used to store and query an RDF dataset and often expose a SPARQL endpoint service on the Web for public access. Most existing SPARQL endpoints support very simple access control mechanisms if ...

20 Apr 2015 3:03am GMT

18 Apr 2015

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Making Debian Docker Images Smaller

TL;DR: Use one RUN to prepare, configure, make, install and cleanup. Cleanup with: apt-get remove --purge -y $BUILD_PACKAGES $(apt-mark showauto) && rm -rf /var/lib/apt/lists/* I've been packaging the nghttp2 HTTP/2.0 proxy and client by Tatsuhiro Tsujikawa in both Debian and with docker and noticed it takes some time to get the build dependencies (C++ cough) as well as to do the build. In the Debian packaging case its easy to create minimal dependencies thanks to pbuilder and ensure the binary package contains only the right files. See debian nghttp2 For docker , since you work with containers it's harder to ...

18 Apr 2015 9:00pm GMT

16 Apr 2015

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CSV on the Web: Seeking comments and implementations

The CSV on the Web Working Group has just published a new set of Working Drafts, which the group considers feature complete and implementable. The drafts are: Model for Tabular Data and Metadata on the Web - an abstract model … Continue reading →

16 Apr 2015 7:42pm GMT

15 Apr 2015

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Future of Text Analytics: A report from Text Analytics World

When I went to Text Analytics World in San Francisco earlier this month, I was struck at how many of the presenters, particularly consultants, ended their talks describing future directions of text analytics as something that sounded so familiar. They described what would be possible once there's advanced maturity in ontologies, the breaking down of siloes, entity and relationship resolution by multiple methods, and automated linking of it all together into semantic network models of knowledge: flexible exploration of the relevant. They made it sound like a bit of a stretch, almost pie in the sky, but what they briefly ...

15 Apr 2015 5:00pm GMT

Support Issue Workflow

Where Dydra appears, in public, as a strictly remote service, the question occurs - "If one cannot walk down the hall and knock on a door - or pound on a table, how does one get issues resolved in a timely manner?" Any claims, that our response completion statistics are well over three nines notwithstanding, a better answer describes how we resolve those issues which do appear in a manner which ensures that 24/7 customer operations remain in service. One aspect is a transparent process to record and track issues. The second is a well-defined response and resolution process.

15 Apr 2015 2:06pm GMT

BGP Statement Pattern Counts

A recent developer mailing list inquiry caught our attention a few days ago. The author was wondering, "[can] anyone … give me a recommendation for 'how big a sane query can get'?" He was wondering, "[can] anyone … give me a recommendation for 'how big a sane query can get'?" His use case was to apply a SPARQL query against the LOD dataset in order to test for the presence of "patterns for human associations". There was mention of subgraph sizes in excess of 400K triples, but as it were, his efforts appeared thwarted by much lower limits which his ...

15 Apr 2015 2:06pm GMT

14 Apr 2015

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Open data and diabetes

In December my daughter was diagnosed with Type 1 diabetes. It was a pretty rough time.

14 Apr 2015 8:16pm GMT

13 Apr 2015

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AKSW Colloquium, 13-04-2015, Effective Caching Techniques for Accelerating Pattern Matching Queries

In this colloquium, Claus Stadler will present the paper Effective Caching Techniques for Accelerating Pattern Matching Queries by Arash Fard, Satya Manda, Lakshmish Ramaswamy, and John A. Miller . Abstract: Using caching techniques to improve response time of queries is a proven approach in many contexts. However, it is not well explored for subgraph pattern matching queries, mainly because of subtleties enforced by traditional pattern matching models. Indeed, efficient caching can greatly impact the query answering performance for massive graphs in any query engine whether it is centralized or distributed. This paper investigates the capabilities of the newly introduced pattern ...

13 Apr 2015 9:51am GMT