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Displaying 1-30 out of 30 total
Moment Invariants for 2D Flow Fields Using Normalization
Found in: 2014 IEEE Pacific Visualization Symposium (PacificVis)
By Roxana Bujack,Ingrid Hotz,Gerik Scheuermann,Eckhard Hitzer
Issue Date:March 2014
pp. 41-48
The analysis of 2D flow data is often guided by the search for characteristic structures with semantic meaning. One way to approach this question is to identify structures of interest by a human observer. The challenge then, is to find similar structures i...
 
Tensor Visualization Driven Mechanical Component Design
Found in: 2014 IEEE Pacific Visualization Symposium (PacificVis)
By Andrea Kratz,Marc Schoeneich,Valentin Zobel,Bernhard Burgeth,Gerik Scheuermann,Ingrid Hotz,Markus Stommel
Issue Date:March 2014
pp. 145-152
This paper is the result of a close collaboration of mechanical engineers and visualization researchers. It showcases how interdisciplinary work can lead to new insight and progress in both fields. Our case is concerned with one step in the product develop...
 
Anisotropic Sampling of Planar and Two-Manifold Domains for Texture Generation and Glyph Distribution
Found in: IEEE Transactions on Visualization and Computer Graphics
By A. Kratz,D. Baum,I. Hotz
Issue Date:November 2013
pp. 1782-1794
We present a new method for the generation of anisotropic sample distributions on planar and two-manifold domains. Most previous work that is concerned with aperiodic point distributions is designed for isotropically shaped samples. Methods focusing on ani...
 
Efficient Computation of Combinatorial Feature Flow Fields
Found in: IEEE Transactions on Visualization and Computer Graphics
By J. Reininghaus,J. Kasten,T. Weinkauf,I. Hotz
Issue Date:September 2012
pp. 1563-1573
We propose a combinatorial algorithm to track critical points of 2D time-dependent scalar fields. Existing tracking algorithms such as Feature Flow Fields apply numerical schemes utilizing derivatives of the data, which makes them prone to noise and involv...
 
Development of a series fault model for DC microgrids
Found in: Innovative Smart Grid Technologies, IEEE PES
By Fabian M. Uriarte,Hunter B. Estes,Thomas J. Hotz,Angelo L. Gattozzi,John D. Herbst,Alexis Kwasinski,Robert E. Hebner
Issue Date:January 2012
pp. 1-8
Series faults are self-sustained arcs produced in series with the normal path of supply power. The electromagnetic transients produced by these series faults are of interest during the design and analysis of existing and forthcoming dc microgrids. This pap...
 
Two-Dimensional Time-Dependent Vortex Regions Based on the Acceleration Magnitude
Found in: IEEE Transactions on Visualization and Computer Graphics
By Jens Kasten,Jan Reininghaus,Ingrid Hotz,Hans-Christian Hege
Issue Date:December 2011
pp. 2080-2087
Acceleration is a fundamental quantity of flow fields that captures Galilean invariant properties of particle motion. Considering the magnitude of this field, minima represent characteristic structures of the flow that can be classified as saddle- or vorte...
 
A Scale Space Based Persistence Measure for Critical Points in 2D Scalar Fields
Found in: IEEE Transactions on Visualization and Computer Graphics
By Jan Reininghaus,Natallia Kotava,David Guenther,Jens Kasten,Hans Hagen,Ingrid Hotz
Issue Date:December 2011
pp. 2045-2052
This paper introduces a novel importance measure for critical points in 2D scalar fields. This measure is based on a combination of the deep structure of the scale space with the well-known concept of homological persistence. We enhance the noise robust pe...
 
Memory-Efficient Computation of Persistent Homology for 3D Images Using Discrete Morse Theory
Found in: Graphics, Patterns and Images, SIBGRAPI Conference on
By David Günther,Jan Reininghaus,Ingrid Hotz,Hubert Wagner
Issue Date:August 2011
pp. 25-32
We propose a memory-efficient method that computes persistent homology for 3D gray-scale images. The basic idea is to compute the persistence of the induced Morse-Smale complex. Since in practice this complex is much smaller than the input data, significan...
 
Fast Combinatorial Vector Field Topology
Found in: IEEE Transactions on Visualization and Computer Graphics
By Jan Reininghaus,Christian Löwen,Ingrid Hotz
Issue Date:October 2011
pp. 1433-1443
This paper introduces a novel approximation algorithm for the fundamental graph problem of combinatorial vector field topology (CVT). CVT is a combinatorial approach based on a sound theoretical basis given by Forman's work on a discrete Morse theory for d...
 
Constructing a GIS geodatabase to assess and analyze the factors enabling proliferation of a noxious seaweed along the south-facing coast of Harwich, Cape Cod, Massachusetts
Found in: Proceedings of the 1st International Conference and Exhibition on Computing for Geospatial Research & Application (COM.Geo '10)
By Helenmary Hotz
Issue Date:June 2010
pp. 1-1
Presently, there is a paucity of knowledge about Pilayella littoralis and the factors influencing its proliferation on the southern facing coast of Cape Cod, MA. Over the past 20 years, the seaweed has moved along the coast from Falmouth to Chatham, and th...
     
Intrinsic MANOVA for Riemannian Manifolds with an Application to Kendall's Space of Planar Shapes
Found in: IEEE Transactions on Pattern Analysis and Machine Intelligence
By Stephan Huckemann, Thomas Hotz, Axel Munk
Issue Date:April 2010
pp. 593-603
We propose an intrinsic multifactorial model for data on Riemannian manifolds that typically occur in the statistical analysis of shape. Due to the lack of a linear structure, linear models cannot be defined in general; to date only one-way MANOVA is avail...
 
Dual streamline seeding
Found in: Visualization Symposium, IEEE Pacific
By Olufemi Rosanwo, Christoph Petz, Steffen Prohaska, Hans-Christian Hege, Ingrid Hotz
Issue Date:April 2009
pp. 9-16
This work introduces a novel streamline seeding technique based on dual streamlines that are orthogonal to the vector field, instead of tangential. The greedy algorithm presented here produces a net of orthogonal streamlines that is iteratively refined res...
 
Moment Invariants for the Analysis of 2D Flow Fields
Found in: IEEE Transactions on Visualization and Computer Graphics
By M. Schlemmer,M. Heringer,F. Morr,I. Hotz,M.-H. Bertram,C. Garth,W. Kollmann,B. Hamann,H. Hagen
Issue Date:November 2007
pp. 1743-1750
We present a novel approach for analyzing two-dimensional (2D) flow field data based on the idea of invariant moments. Moment invariants have traditionally been used in computer vision applications, and we have adapted them for the purpose of interactive e...
 
Global Models for the Orientation Field of Fingerprints: An Approach Based on Quadratic Differentials
Found in: IEEE Transactions on Pattern Analysis and Machine Intelligence
By Stephan Huckemann, Thomas Hotz, Axel Munk
Issue Date:September 2008
pp. 1507-1519
Quadratic differentials naturally define analytic orientation fields on planar surfaces. We propose to model orientation fields of fingerprints by specifying quadratic differentials. Models for all fingerprint classes such as arches, loops and whorls are l...
 
Anisotropic Noise Samples
Found in: IEEE Transactions on Visualization and Computer Graphics
By Louis Feng, Ingrid Hotz, Bernd Hamann, Kenneth Joy
Issue Date:March 2008
pp. 342-354
We present a practical approach to generate stochastic anisotropic samples with Poisson-disk characteristic over a two-dimensional domain. In contrast to isotropic samples, we understand anisotropic samples as non-overlapping ellipses whose size and densit...
 
Simulation-Based Early Warning Systems as a Practical Approach for the Automotive Industry
Found in: Winter Simulation Conference
By I. Hotz, A. Hanisch, T. Schulze
Issue Date:December 2006
pp. 1962-1970
Simulation-based early warning systems (SEWS) support proactive control of real material flow systems. In consequence of real or potential state changes, proactive control (unlike reactive control) makes foresighted and target-oriented acting possible. Sta...
 
Physically Based Methods for Tensor Field Visualization
Found in: Visualization Conference, IEEE
By Ingrid Hotz, Louis Feng, Hans Hagen, Bernd Hamann, Kenneth Joy, Boris Jeremic
Issue Date:October 2004
pp. 123-130
<p>The physical interpretation of mathematical features of tensor fields is highly application-specific. Existing visualization methods for tensor fields only cover a fraction of the broad application areas. We present a visualization method tailored...
 
Using a Structure-based Configuration Tool for Product Derivation
Found in: Automated Software Engineering, International Conference on
By Lothar Hotz, Thorsten Krebs, Katharina Wolter
Issue Date:September 2004
pp. 388-391
Because of the possibly large variability in families of software systems and the complex dependencies between individual software components, product derivation in the context of software-intensive systems is not a trivial task. In this demonstration, we ...
 
Isometric Embedding by Surface Reconstruction from Distances
Found in: Visualization Conference, IEEE
By Ingrid Hotz
Issue Date:November 2002
pp. N/A
To display the intuitive meaning of an abstract metric it is helpful to look on an embedded surface with the same inner geometry as the given metric. The resulting partial differential equations have no standard solution. Only for some special cases satisf...
 
REVI-MINER, a KDD-environment for deviation detection and analysis of warranty and goodwill cost statements in automotive industry
Found in: Proceedings of the seventh ACM SIGKDD international conference on Knowledge discovery and data mining (KDD '01)
By E. Hotz, G. Nakhaeizadeh, M. Wieczorek, U. Grimmer, W. Heuser
Issue Date:August 2001
pp. 432-437
REVI-MINER is a KDD-environment which supports the detection and analysis of deviations in warranty and goodwill cost statements. The system was developed within the framework of a cooperation between DaimlerChrysler Research & Technology and Global Servic...
     
Visualizing Geodesics
Found in: Visualization Conference, IEEE
By Ingrid Hotz, Hans Hagen
Issue Date:October 2000
pp. 52
One of the main research topics in scientific visualization is to
 
Calculation of contact forces
Found in: Proceedings of the ACM symposium on Virtual reality software and technology (VRST '99)
By A. Kerzmann, C. Lennerz, E. Schomer, G. Hotz, R. Schmid, T. Warken
Issue Date:December 1999
pp. 180-181
Detecting collisions and calculating physically correct collision responses play an important role when simulating the dynamics of colliding rigid bodies. VR-applications such as virtual assembly planning and ergonomy studies can especially profit from adv...
     
WAPS, a data mining support environment for the planning of warranty and goodwill costs in the automobile industry
Found in: Proceedings of the fifth ACM SIGKDD international conference on Knowledge discovery and data mining (KDD '99)
By B. Petzsche, E. Hotz, G. Nakhaeizadeh, H. Spiegelberger
Issue Date:August 1999
pp. 417-419
This talk is an interim report on the 5 year plan launched in 1996 to provide a theoretical and computational foundation of Statistics for massive data sets. The plan coincided with the formation of AT&T Labs and the proposed research agenda of the In...
     
SiLVIA - A Simulation Library for Virtual Reality Applications
Found in: Virtual Reality Conference, IEEE
By G. Hotz, A. Kerzmann, C. Lennerz, R. Schmid, E. Schömer, T. Warken
Issue Date:March 1999
pp. 82
The main purpose of SiLVIA is to supply procedures for simulating the dynamics of colliding rigid bodies and the interactive manipulation of these bodies in virtual environments. Detecting collisions between virtual objects and calculating their reaction t...
 
VISA: Netstation's virtual Internet SCSI adapter
Found in: Proceedings of the eighth international conference on Architectural support for programming languages and operating systems (ASPLOS-VIII)
By Gregory G. Finn, Rodney Van Meter, Steve Hotz
Issue Date:October 1998
pp. 205-209
In this paper we describe the implementation of VISA, our Virtual Internet SCSI Adapter. VISA was built to evaluate the performance impact on the host operating system of using IP to communicate with peripherals, especially storage devices. We have built a...
     
Minimizing ROBDD Sizes of Incompletely Specified Boolean Functions by Exploiting Strong Symmetries
Found in: European Design and Test Conference
By C. Scholl, S. Melchior, G. Hotz, P. Molitor
Issue Date:March 1997
pp. 229
We present a method computing a minimum sized partition of the variables of an incompletely specified Boolean function into symmetric groups. The method can be used during minimization of ROBDDs of incompletely specified Boolean functions. We apply it as a...
 
Task Force on Network Storage Architecture: Internet-attached storage devices
Found in: Hawaii International Conference on System Sciences
By Rodney Van Meter, Steve Hotz, Gregory G. Finn
Issue Date:January 1997
pp. 726
No summary available.
   
Experiences Applying Rome Laboratory' s Software Quality Framework to the Joint STARS Radar
Found in: Software Engineering Standards, International Symposium on
By D. Hotz
Issue Date:August 1995
pp. 60
No summary available.
 
Scalable inter-domain routing architecture
Found in: Conference proceedings on Communications architectures & protocols (SIGCOMM '92)
By Deborah Estrin, Steven Hotz, Yakov Rekhter
Issue Date:August 1992
pp. 406-415
As internets grow, both in size and in the diversity of routing requirements, providing inter-domain routing that can accommodate both of these factors becomes increasingly crucial. We propose a scalable inter-domain routing architecture consisting of two ...
     
Hierarchical design based on a calculus of nets
Found in: 24th ACM/IEEE conference proceedings on Design automation conference (DAC '87)
By B. Becker, G. Hotz, H.-G. Osthof, P. Molitor, R. Kolla
Issue Date:June 1987
pp. 649-653
We present an algebraic approach to hierarchical design of integrated circuits. This approach is based on a “calculus of nets” which includes topological as well as behavioural aspects of integrated circuits. We have developed a hierarchical de...
     
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