110 research outputs found
Graph functionality
In the present paper, we introduce the notion of graph functionality, which generalises simultaneously several other graph parameters, such as degeneracy or clique-width, in the sense that bounded degeneracy or bounded clique-width imply bounded functionality. Moreover, we show that this generalisation is proper by revealing classes of graphs of unbounded degeneracy and clique-width, where functionality is bounded by a constant. We also prove that bounded functionality implies bounded VC-dimension, i.e., graphs of bounded VC-dimension extend graphs of bounded functionality, and this extension is also proper
TopicViz: Semantic Navigation of Document Collections
When people explore and manage information, they think in terms of topics and
themes. However, the software that supports information exploration sees text
at only the surface level. In this paper we show how topic modeling -- a
technique for identifying latent themes across large collections of documents
-- can support semantic exploration. We present TopicViz, an interactive
environment for information exploration. TopicViz combines traditional search
and citation-graph functionality with a range of novel interactive
visualizations, centered around a force-directed layout that links documents to
the latent themes discovered by the topic model. We describe several use
scenarios in which TopicViz supports rapid sensemaking on large document
collections
TESNA: A Tool for Detecting Coordination Problems
Detecting problems in coordination can prove to be very difficult. This is especially true in large globally distributed environments where the Software Development can quickly go out of the Project Manager’s control. In this paper we outline a methodology to analyse the socio-technical coordination structures. We also show how this can be made easier with the help of a tool called TESNA that we have developed
An early look at the LDBC Social Network Benchmark's Business Intelligence workload
In this short paper, we provide an early look at the LDBC Social Network Benchmark's Business Intelligence (BI) workload which tests graph data management systems on a graph business analytics workload. Its queries involve complex aggregations and navigations (joins) that touch large data volumes, which is typical in BI workloads, yet they depend heavily on graph functionality such as connectivity tests and path finding. We outline the motivation for this new benchmark, which we derived from many interactions with the graph database industry and its users, and situate it in a scenario of social network analysis. The workload was designed by taking into account technical ``chokepoints'' identified by database system architects from academia and industry, which we also describe and map to the queries. We present reference implementations in openCypher, PGQL, SPARQL, and SQL, and preliminary results of SNB BI on a number of graph data management systems
Functionality of box intersection graphs
Functionality is a graph complexity measure that extends a variety of
parameters, such as vertex degree, degeneracy, clique-width, or twin-width. In
the present paper, we show that functionality is bounded for box intersection
graphs in , i.e. for interval graphs, and unbounded for box
intersection graphs in . We also study a parameter known as
symmetric difference, which is intermediate between twin-width and
functionality, and show that this parameter is unbounded both for interval
graphs and for unit box intersection graphs in .Comment: 11 page
Local Government planning: from data to action
Decentralisation is built on the assu
mption that decentralized governme
nts are more knowledgeable about
and responsive to the needs of the poor. This article ex
amines the role of local governments in Kenya and the
ways in which they make their decisions about the allocation of resources to deliver water and sanitation
services. Two major challenges are identified: i) lack of
data that accurately reveal
which areas are most in
need; and ii) inadequate instruments for planning, monitoring and evaluation. In tackling previous
shortcomings, this study i) adopts a new specific appr
oach for data collection at community level, and ii)
exploits these data through simple composite indicator
s as policy tools that assist local government with
decision-making. It concludes that accurate and compre
hensive data are the basis of effective targeting and
prioritization, which are fundamental to sector planning.Peer ReviewedPostprint (published version
09. Plotly with Extra Plotly
Students learn plotly and use it for their projects. Facilitators introduce plotly, and guide them through the tool until they are comfortable, and then the facilitators give the students time to use their new skills to make fulfilling visualizations for their overarching projects
- …