Paul Rosenthal | University of Rostock (original) (raw)
Papers by Paul Rosenthal
Journal For Geometry and Graphics, 2004
Lecture Notes in Computer Science, 2015
Gender relations are reproduced both within HCI development processes as well as within contexts ... more Gender relations are reproduced both within HCI development processes as well as within contexts of use. Hence, theorising the subject of gender becomes part of the responsibility of HCI as a form of practice. The fledgling subfield of feminist HCI has created an epistemological basis for thinking through these challenges. The current text seeks to relate to these contributions by analysing practices of coding as they pertain to HCI. We argue that coding is of yet undertheorised regarding the subject of gender relations. By drawing on the semiotic theories of Michael Mateas and combining them with Donna Haraway’s reading of material-semiotic actors, the text aims to provide new impulses for a theorisation of the practice of code-writing as a (potentially gendered) writing practice. It thus aims at increasing the translatability of HCI theory into gender-aware communities of knowledge production.
Lecture Notes in Computer Science, 2015
HCI’s success as a discipline is based on its ability of dealing with the problems, desires, and ... more HCI’s success as a discipline is based on its ability of dealing with the problems, desires, and requirements of technology users. Through its turn to user experience, the community was able to create products whose use is pleasant and exciting. There are, however, design contexts where the corresponding focus on fostering use might be in need of a complementing perspective. During the last couple of years, the topic of technology non-use has appeared within the scope of HCI. Within this text, we will explore how these recent conceptualisations and analyses can be employed in order to turn non-use into a design resource. We do so by discussing them in the context of a concrete development project aimed at creating interactive technology for exhibition contexts.
Lecture Notes in Computer Science, 2015
IEEE Transactions on Visualization and Computer Graphics
Smooth surface extraction using partial differential equations (PDEs) is a well-known and widely ... more Smooth surface extraction using partial differential equations (PDEs) is a well-known and widely used technique for visualizing volume data. Existing approaches operate on gridded data and mainly on regular structured grids. When considering unstructured point-based volume data where sample points do not form regular patterns nor are they connected in any form, one would typically resample the data over a grid prior to applying the known PDE-based methods. We propose an approach that directly extracts smooth surfaces from unstructured point-based volume data without prior resampling or mesh generation. When operating on unstructured data one needs to quickly derive neighborhood information. The respective information is retrieved by partitioning the 3D domain into cells using a kd-tree and operating on its cells. We exploit neighborhood information to estimate gradients and mean curvature at every sample point using a four-dimensional least-squares fitting approach. Gradients and me...
Point-based rendering approaches have gained a major interest in recent years, basically replacin... more Point-based rendering approaches have gained a major interest in recent years, basically replacing global surface reconstruction with local surface estimations us-ing, for example, splats or implicit functions. Crucial to their performance in terms of rendering quality and speed is the representation of the local surface patches. We present a novel approach that goes back to the orig-inal ideas of Grossman and Dally to avoid any object-space operations and compute high-quality renderings by only applying image-space operations. Starting from a point cloud including normals, we render the lit point cloud to a texture with color, depth, and normal information. Subsequently, we apply several filter operations. In a first step, we use a mask to fill back-ground pixels with the color and normal of the adjacent pixel with smallest depth. The mask assures that only the desired pixels are filled. Similarly, in a second pass, we fill the pixels that display occluded surface parts. The result...
Smoothed particle hydrodynamics is a completely mesh-free method to simulate fluid flow. Rather t... more Smoothed particle hydrodynamics is a completely mesh-free method to simulate fluid flow. Rather than representing the physical variables on a fixed grid, the fluid is represented by freely moving interpolation centers ("particles"). Apart from their position and velocity these particles carry information about the physical quantities of the con- sidered fluid, such as temperature, composition, chemical potentials etc. Being completely
Point-based surface representations have gained increasing interest in the computer graphics comm... more Point-based surface representations have gained increasing interest in the computer graphics community within the last decade. Surface splatting established as one of the mai n rendering techniques for point clouds. We present a ray-tracing approach for objects whose surfaces are represented by point clouds. Our approach is based on casting rays and intersecting them with splats. Since ray-tracing methods require
Lecture Notes in Computer Science, 2014
ABSTRACT Every HCI artefact reproduces a specific stance towards its users. Influential within th... more ABSTRACT Every HCI artefact reproduces a specific stance towards its users. Influential within the academic sphere is the notion of a User-Centered-Design process. However, observing actual design practice renders the assumption of the centrality of users problematic. To this end, the text conducts an exploration of the relationship between discourse within the fields of HCI and architecture. A special focus are the formal expressions of deconstructivism within architecture and their potential counterparts within HCI design.
Journal For Geometry and Graphics, 2004
Lecture Notes in Computer Science, 2015
Gender relations are reproduced both within HCI development processes as well as within contexts ... more Gender relations are reproduced both within HCI development processes as well as within contexts of use. Hence, theorising the subject of gender becomes part of the responsibility of HCI as a form of practice. The fledgling subfield of feminist HCI has created an epistemological basis for thinking through these challenges. The current text seeks to relate to these contributions by analysing practices of coding as they pertain to HCI. We argue that coding is of yet undertheorised regarding the subject of gender relations. By drawing on the semiotic theories of Michael Mateas and combining them with Donna Haraway’s reading of material-semiotic actors, the text aims to provide new impulses for a theorisation of the practice of code-writing as a (potentially gendered) writing practice. It thus aims at increasing the translatability of HCI theory into gender-aware communities of knowledge production.
Lecture Notes in Computer Science, 2015
HCI’s success as a discipline is based on its ability of dealing with the problems, desires, and ... more HCI’s success as a discipline is based on its ability of dealing with the problems, desires, and requirements of technology users. Through its turn to user experience, the community was able to create products whose use is pleasant and exciting. There are, however, design contexts where the corresponding focus on fostering use might be in need of a complementing perspective. During the last couple of years, the topic of technology non-use has appeared within the scope of HCI. Within this text, we will explore how these recent conceptualisations and analyses can be employed in order to turn non-use into a design resource. We do so by discussing them in the context of a concrete development project aimed at creating interactive technology for exhibition contexts.
Lecture Notes in Computer Science, 2015
IEEE Transactions on Visualization and Computer Graphics
Smooth surface extraction using partial differential equations (PDEs) is a well-known and widely ... more Smooth surface extraction using partial differential equations (PDEs) is a well-known and widely used technique for visualizing volume data. Existing approaches operate on gridded data and mainly on regular structured grids. When considering unstructured point-based volume data where sample points do not form regular patterns nor are they connected in any form, one would typically resample the data over a grid prior to applying the known PDE-based methods. We propose an approach that directly extracts smooth surfaces from unstructured point-based volume data without prior resampling or mesh generation. When operating on unstructured data one needs to quickly derive neighborhood information. The respective information is retrieved by partitioning the 3D domain into cells using a kd-tree and operating on its cells. We exploit neighborhood information to estimate gradients and mean curvature at every sample point using a four-dimensional least-squares fitting approach. Gradients and me...
Point-based rendering approaches have gained a major interest in recent years, basically replacin... more Point-based rendering approaches have gained a major interest in recent years, basically replacing global surface reconstruction with local surface estimations us-ing, for example, splats or implicit functions. Crucial to their performance in terms of rendering quality and speed is the representation of the local surface patches. We present a novel approach that goes back to the orig-inal ideas of Grossman and Dally to avoid any object-space operations and compute high-quality renderings by only applying image-space operations. Starting from a point cloud including normals, we render the lit point cloud to a texture with color, depth, and normal information. Subsequently, we apply several filter operations. In a first step, we use a mask to fill back-ground pixels with the color and normal of the adjacent pixel with smallest depth. The mask assures that only the desired pixels are filled. Similarly, in a second pass, we fill the pixels that display occluded surface parts. The result...
Smoothed particle hydrodynamics is a completely mesh-free method to simulate fluid flow. Rather t... more Smoothed particle hydrodynamics is a completely mesh-free method to simulate fluid flow. Rather than representing the physical variables on a fixed grid, the fluid is represented by freely moving interpolation centers ("particles"). Apart from their position and velocity these particles carry information about the physical quantities of the con- sidered fluid, such as temperature, composition, chemical potentials etc. Being completely
Point-based surface representations have gained increasing interest in the computer graphics comm... more Point-based surface representations have gained increasing interest in the computer graphics community within the last decade. Surface splatting established as one of the mai n rendering techniques for point clouds. We present a ray-tracing approach for objects whose surfaces are represented by point clouds. Our approach is based on casting rays and intersecting them with splats. Since ray-tracing methods require
Lecture Notes in Computer Science, 2014
ABSTRACT Every HCI artefact reproduces a specific stance towards its users. Influential within th... more ABSTRACT Every HCI artefact reproduces a specific stance towards its users. Influential within the academic sphere is the notion of a User-Centered-Design process. However, observing actual design practice renders the assumption of the centrality of users problematic. To this end, the text conducts an exploration of the relationship between discourse within the fields of HCI and architecture. A special focus are the formal expressions of deconstructivism within architecture and their potential counterparts within HCI design.