GraphSense
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My research interest lies in finding and applying quantitative methods for gaining new insights from large-scale, connected datasets. I often act as bridge reseacher between fields and contribute practical methods and tools drawn from machine learning, network analytics, and text mining.
My current research topics are:. Ransomware Payments in the Bitcoin Ecosystem. Encyclopedia of Big Data Technologies, Network-based Knowledge Graph Assessment. O Bitcoin Where Art Thou? Insight into Large-Scale Transaction Graphs. Open Annotations on multimedia Web resources.
Sifting useful comments from Flickr Commons and YouTube. International Journal on Digital Libraries A Python tool for extracting entity mentions from a collection of Wikipedia documents. Software implementing the ResourceSync data synchronization framework for the Web. A system that allows people to cross-reference historical maps with resources in Web-based knowledge graphs.
It also demonstrates application of the W3C Open Annotation specification. An analyzer module for Apache Lucene 4. A generic change detection framework for Linked Data sources that informs data-consuming actors about the various types of events create, remove, move, update that can occur in data sources. Ransomware Payments in the Bitcoin Ecosystem: This dataset contains 7, Bitcoin seed addresses related to 67 ransomware families as well as addresses that were identified by applying the expansion procedure described in in our paper.
A open dataset comprising metadata of 20 million texts, images, videos and sounds gathered from institutions all over Europe by Europeana. This interdisciplinary international DACH FWF-DFG digital humanities project aims at gaining insight into the perception of the Other focusing on the Orient by analyzing an extensive collection of German language travelogues covering the period from until It will o bitcoin where art thou together a team of researchers from history, computer science, as well as library and information science from Austria and Germany.
They will jointly develop a novel mixed qualitative and quantitative method for the serial o bitcoin where art thou of large-scale text corpora and apply that method on a comprehensive corpus of travelogues originally published in the German language ca. The goal of the VIRTCRIME project lies in the development of novel algorithms and methods for tracing criminal transactions in post-Bitcoin era cryptocurrencies, while considering illegitimate activities in Darknet market places.
Orthogonally, the project will provide novel criminological procedures and law enforcement approaches, and investigate legal pre-conditions and consequences. The goal of the GraphSense project is to research and develop novel algorithmic solutions for detecting anomalies in large-scale, dynamically changing graph datasets.
The focus will be on developing anomaly detection techniques o bitcoin where art thou transaction networks constructed from virtual currencies Bitcoin and investigate their applicability for enterprise financial fraud detection settings. Research and develop methods to prevent and prosecute organised crime in o bitcoin where art thou currencies.
Sloan FoundationResearcher. Research, develop, prototype, test, and deploy mechanisms for the large-scale synchronization of web resources. Building on the OAI-PMH strategies for synchronizing metadata, this o bitcoin where art thou will enhance that specification using modern web technologies, but will allow for the synchronization of the objects themselves, not just their metadata.
Research on i interactive links discovery in scholarly publications, ii strategies for maintaining link integrity, and iii novel Web-based resource aggregation and presentation interfaces for scholarly publication workflows. Mellon FoundationPrincipal Investigator. Examine application of the Open Annotation Specification in the context of digitized historical maps. Design and build a collaborative Web environment in which scholars and citizens can contribute their knowledge to digitized high-resolution online maps.
We o bitcoin where art thou with designs that integrate the annotation process with the re-use of data from public data sources, such as Wikipedia.
An interdisciplinary project with the Institute for Egyptology at the University of Vienna. O bitcoin where art thou aimed at building a collaborative Web-based solution for efficiently organizing the collected and digitized content objects from the Egyptian middle kingdom period by means of open collaboratively developed vocabularies.
ResourceSync Framework Specification co-editor: Open Annotation Data Model contributor: Open Annotations can easily be shared between platforms, with sufficient richness of expression to satisfy complex requirements while o bitcoin where art thou simple enough to also allow for the most common use cases, such as attaching a piece of text to a single web resource.
The goal of this course is to introduce the design principles and technologies for building global information, data, and financial networks, show the practical applications of such systems, and discuss their design and their social and policy context. An undergraduate course involving development of an application related to media informatics. A masters-level course introducing technologies for building data-centric Web information systems in the library domain.
Discussion of cross-cutting issues such as Linked Open Data. This course introduces technologies for building data-centric information systems on the World Wide Web, show the practical applications of such systems, and discuss their design and their social and policy context by examining cross-cutting issues such as citizen science, data journalism and open government.
Independent or group project under the direction of a CS field member or researcher. A masters-level course in Media Informatics examining technologies and available applications for building multimedia Web information systems. An advanced masters-level course focusing on the principles of information retrieval in distributed environments such as the Web, with a special focus on multimedia information.
An undergraduate course focusing on the technical properties of various media types image, audio, video and their technical processing e. An undergraduate course involving the development of an application related to the media informatics field. Semantic Tagging for old maps Open Humanities Award Multimedia Tools and Applications International Journal on Metadata, Semantics, and Ontologies International Journal on Digital Libraries, ACM Computing Surveys Dublin Core Conference DC - Linked O bitcoin where art thou Triplification Challenge My current research topics are: I am leading the GraphSense project and spend most of my time on investigating and developing new methods and tools for analyzing the structure and dynamics of cryptocurrency ecosystems, such as Bitcoin.
I work on developing novel text mining and machine learning methods for constructing enterprise knowledge graph from large document collections.
