Beelddenken en ruimtelijk inzicht voor ontwerpers

De uitg. Tekst en opgaven is samengesteld ter gelegenheid van de cursus Beelddenken en Ruimtelijk Inzicht gegeven in mei 1993 op uitnodiging van het Studium Generale van de Technische Universiteit Eindhove

Beelddenken en ruimtelijk inzicht voor ontwerpers

De uitg. Tekst en opgaven is samengesteld ter gelegenheid van de cursus Beelddenken en Ruimtelijk Inzicht gegeven in mei 1993 op uitnodiging van het Studium Generale van de Technische Universiteit Eindhove

User Interaction in Semi-Automatic Segmentation of Organs at Risk: a Case Study in Radiotherapy

Accurate segmentation of organs at risk is an important step in radiotherapy planning. Manual segmentation being a tedious procedure and prone to inter- and intra-observer variability, there is a growing interest in automated segmentation methods. However, automatic methods frequently fail to provide satisfactory result, and post-processing corrections are often needed. Semi-automatic segmentation methods are designed to overcome these problems by combining physicians’ expertise and computers’ potential. This study evaluates two semi-automatic segmentation methods with different types of user interactions, named the “strokes” and the “contour”, to provide insights into the role and impact of human-computer interaction. Two physicians participated in the experiment. In total, 42 case studies were carried out on five different types of organs at risk. For each case study, both the human-computer interaction process and quality of the segmentation results were measured subjectively and objectively. Furthermore, different measures of the process and the results were correlated. A total of 36 quantifiable and ten non-quantifiable correlations were identified for each type of interaction. Among those pairs of measures, 20 of the contour method and 22 of the strokes method were strongly or moderately correlated, either directly or inversely. Based on those correlated measures, it is concluded that: (1) in the design of semi-automatic segmentation methods, user interactions need to be less cognitively challenging; (2) based on the observed workflows and preferences of physicians, there is a need for flexibility in the interface design; (3) the correlated measures provide insights that can be used in improving user interaction design

Narrowband Searches for Continuous and Long-duration Transient Gravitational Waves from Known Pulsars in the LIGO-Virgo Third Observing Run

Isolated neutron stars that are asymmetric with respect to their spin axis are possible sources of detectable continuous gravitational waves. This paper presents a fully coherent search for such signals from eighteen pulsars in data from LIGO and Virgo's third observing run (O3). For known pulsars, efficient and sensitive matched-filter searches can be carried out if one assumes the gravitational radiation is phase-locked to the electromagnetic emission. In the search presented here, we relax this assumption and allow both the frequency and the time derivative of the frequency of the gravitational waves to vary in a small range around those inferred from electromagnetic observations. We find no evidence for continuous gravitational waves, and set upper limits on the strain amplitude for each target. These limits are more constraining for seven of the targets than the spin-down limit defined by ascribing all rotational energy loss to gravitational radiation. In an additional search, we look in O3 data for long-duration (hours-months) transient gravitational waves in the aftermath of pulsar glitches for six targets with a total of nine glitches. We report two marginal outliers from this search, but find no clear evidence for such emission either. The resulting duration-dependent strain upper limits do not surpass indirect energy constraints for any of these targets. © 2022. The Author(s). Published by the American Astronomical Society

Map of Reading, Reviewing, and Academic Writing

Academic writing follows conventions that are meant to optimize effectiveness (quality of findings) and efficiency (how easily the reader can find what he needs).This Map brings together a number of lessons, tips, and hints about communication in general and academic writing in particular, paying special attention to the (visually oriented) skills and needs of designers as readers and writers.Design Conceptualization and Communicatio

Framework for Policy and Governance on Research through Design: Seeding document for panel session RTD2019 Conference ‘Method & Critique”, Thursday 21/3/2019 at Het Nieuwe Instituut, Rotterdam, The Netherlands.

The document was used to prime the panel discussion, and distributed to the audience at the conference eventDesign Conceptualization and Communicatio

Scaling the visual consequences of active head movements: A study of active perceivers and spatial technology

Industrial Design Engineerin

Teaching principles of qualitative analysis to industrial design engineers

Doing qualitative field research has become a standard part of academic human-centered design education. Part of the challenge is to bring design students a thorough understanding of research methods, and practical skills in performing small scale user research as part of design projects. This involves understanding and ability at interpreting data, categorizing information, and appreciating how theories are built. This paper reports on an exercise sequence in which students go through the analysis process of a transcript from a field study, and discusses how a relatively simple exercise can serve to equip students with both a practical know-how of carrying out analysis as well as instantiation and experience for discussing underlying concepts such as triangulation, abstraction levels, and the relations between data, information, and knowledgeIndustrial DesignIndustrial Design Engineerin

Method and electronic database search engine for exposing the content of an electronic database

The invention relates to an electronic database search engine comprising an electronic memory device suitable for storing and releasing elements from the database, a display unit, a user interface for selecting and displaying at least one element from the database on the display unit, and control means for controlling the user interface, which user interface allocates icons to the elements of the database, which icons are suitable for display on the display unit at mutual distances that depend on the elements' degree of dissimilarity, wherein the user interface at initial utilization displays at least some icons on the display unit.Industrial Design Engineerin