Now showing items 1-20 of 45

• #### Approximating Acyclicity Parameters of Sparse Hypergraphs ﻿

(Conference object; Peer reviewed; Journal article, 2009)
The notions of hypertree width and generalized hypertree width were introduced by Gottlob, Leone, and Scarcello (PODS'99, PODS'01) in order to extend the concept of hypergraph acyclicity. These notions were further generalized ...
• #### B-chromatic number: Beyond NP-hardness ﻿

(Conference object; Peer reviewed; Journal article, 2015)
The b-chromatic number of a graph G, chi_b(G), is the largest integer k such that G has a k-vertex coloring with the property that each color class has a vertex which is adjacent to at least one vertex in each of the other ...
• #### Colluding Tags Attack on the ECC-based Grouping Proofs for Rfids ﻿

(Conference object, 2012)
Recently, a new privacy-preserving elliptic curve based grouping proof protocol with colluding tag prevention( CTP) has been proposed. The CTP protocol is claimed to be resistant against colluding tags attacks in which the ...
• #### Community Detection on the GPU ﻿

(Conference object; Peer reviewed, 2017)
We present and evaluate a new GPU algorithm based on the Louvain method for community detection. Our algorithm is the first for this problem that parallelizes the access to individual edges. In this way we can fine tune ...
• #### A Comparative Analysis of Feature Selection Methods for Biomarker Discovery in Study of Toxicant-Treated Atlantic Cod (Gadus Morhua) Liver ﻿

(Chapter; Conference object; Peer reviewed, 2019)
Univariate and multivariate feature selection methods can be used for biomarker discovery in analysis of toxicant exposure. Among the univariate methods, differential expression analysis (DEA) is often applied for its ...
• #### Computing cutwidth and pathwidth of semi-complete digraphs via degree orderings ﻿

(Conference object; Peer reviewed; Journal article, 2013)
The notions of cutwidth and pathwidth of digraphs play a central role in the containment theory for tournaments, or more generally semi-complete digraphs, developed in a recent series of papers by Chudnovsky, Fradkin, Kim, ...
• #### Connecting Vertices by Independent Trees ﻿

(Conference object, 2014)
We study the paramereteized complexity of the following connectivity problem. For a vertex subset U of a graph G, trees T1, . . . , Ts of G are completely independent spanning trees of U if each of them contains U , and ...
• #### Counting Instances of Software Components ﻿

(Proceedings of LRPP'04: Workshop on Logics for Resources, Processes, and Programs, Turku, Finland, July 13, 2004, Conference object, 2004-07-13)
Component software is software that has been assembled from various pieces of standardized, reusable computer programs, so-called components. Executing component software creates instances of these components. For several ...
• #### Direct data transfer between SOAP web services in Orchestration ﻿

(Conference object; Peer reviewed, 2012)
In scientific data analysis, workflows are used to integrate and coordinate resources such as databases and tools. Workflows are normally executed by an orchestrator that invokes component services and mediates data transport ...
• #### Editing to Eulerian Graphs ﻿

(Conference object, 2014)
We investigate the problem of modifying a graph into a connected graph in which the degree of each vertex satisfies a prescribed parity constraint. Let ea, ed and vd denote the operations edge addition, edge deletion and ...
• #### An Ensemble Feature Selection Framework Integrating Stability ﻿

(Chapter; Conference object; Peer reviewed, 2019)
Ensemble feature selection has drawn more and more attention in recent years. There are mainly two strategies for ensemble feature selection, namely data perturbation and function perturbation. Data perturbation performs ...
• #### Enumerating minimal connected dominating sets in graphs of bounded chordality ﻿

(Conference object; Peer reviewed; Journal article, 2015)
Listing, generating or enumerating objects of specified type is one of the principal tasks in algorithmics. In graph algorithms one often enumerates vertex subsets satisfying a certain property. We study the enumeration ...
• #### Fast biclustering by dual parameterization ﻿

(Conference object; Peer reviewed; Journal article, 2015)
We study two clustering problems, Starforest Editing, the problem of adding and deleting edges to obtain a disjoint union of stars, and the generalization Bicluster Editing. We show that, in addition to being NP-hard, none ...
• #### Finding even subgraphs even faster ﻿

(Conference object; Peer reviewed; Journal article, 2015)
Problems of the following kind have been the focus of much recent research in the realm of parameterized complexity: Given an input graph (digraph) on n vertices and a positive integer parameter k, find if there exist k ...
• #### Finding Induced Subgraphs via Minimal Triangulations ﻿

(Conference object; Peer reviewed; Journal article, 2010)
Potential maximal cliques and minimal separators are combinatorial objects which were introduced and studied in the realm of minimal triangulation problems in- cluding Minimum Fill-in and Treewidth. We discover unexpected ...
• #### Finding k Disjoint Triangles in an Arbitrary Graph ﻿

(Conference object, 2004)
• #### Interactive Visualization of Streaming Data with Kernel Density Estimation ﻿

(Conference object, 2011)
In this paper, we discuss the extension and integration of the statistical concept of Kernel Density Estimation (KDE) in a scatterplotlike visualization for dynamic data at interactive rates. We present a line kernel for ...
• #### Investigating Streamless Sets ﻿

(Conference object; Peer reviewed, 2015)
In this paper we look at streamless sets, recently investigated by Coquand and Spiwack. A set is streamless if every stream over that set contain a duplicate. It is an open question in constructive mathematics whether the ...
• #### Investigating the Limitations of Java Annotations for Input Validation ﻿

(Conference object, 2010)
Recently Java annotations have received a lot of attention as a possible way to simplify the usage of various frameworks, ranging from persistence and verification to security. In this paper we discuss our experiences in ...
• #### Kernel(s) for Problems with No Kernel: On Out-Trees with Many Leaves ﻿

(Conference object; Peer reviewed; Journal article, 2009)
The {\sc $k$-Leaf Out-Branching} problem is to find an out-branching, that is a rooted oriented spanning tree, with at least $k$ leaves in a given digraph. The problem has recently received much attention from the ...