28 research outputs found
ZEITliche Angelegenheiten : Mein Praxissemester beim Zeitverlag Gerd Bucerius GmbH & Co. KG
No full textThorben Wesche studiert Bibliotheks- und Informationsmanagement (BIM) im 5. Semester an der Hochschule für Angewandte Wissenschaften in Hamburg. Sein Praxissemester, das für alle Studierenden im dritten Semester verpflichtend vorgeschrieben ist, verbrachte er in der Anzeigenabteilung des Hamburger Zeitverlags Gerd Bucerius GmbH & Co. KG. Nachfolgend berichtet er über seine Erfahrungen und Erlebnisse während seines Praxissemesters, und bietet Tipps für Studierende, die das Praktikum noch vor sich haben.Thorben Wesche is studying Library and Information Management (BIM) in the 5th semester at the Hochschule für Angewandte Wissenschaften in Hamburg. He spent his practical semester, which is compulsory for all students in the third semester, in the advertising department of the Hamburg-based Zeitverlag Gerd Bucerius GmbH & Co. KG. In the following, he reports his experiences and adventures during his practical semester and offers tips for students who have the practical semester still ahead of them
Animating Still Images: Folding Texture Design and Synthesis
No full textThe phenomenon of one element moving and progressively overlaying another is common in nature, such as waves swashing and backwashing, or eyelids moving over eyeballs while blinking. Folding Texture, which was proposed by Thorben, can simulate this texture “folding” visual effect in real-time without changing geometry.However, to date, no tool has been developed to assist in the design and synthesis of folding textures. Applications of the technique so far are achieved through manual creation of the folding texture, which is a tedious process.This thesis explores the problem of folding-texture design and synthesis. A novel approach is proposed for animating still images based on the folding texture technique. The approach uses a semi-automatic, user-assisted method that combines texture editing, motion profile specification, and folding texture synthesis into one seamless process, reducing the need for extensive manual work. It enables novice users to utilize the technique with a fair level of prior knowledge of folding texture.Computer Scienc
Fourier Spectral Methods for Bayesian Filtering of Stochastic Partial Differential Equations
No full textThe development of computationally ecient algorithms for statistical inference of stochastic dierential equations has been a long-standing research subject ever since the advent of stochastic analysis. Recently, there has been an increasing interest in extending these methods to the statistical study of stochastic partial dierential equations. In this thesis, we are concerned with statistical inference for the linear stochastic convection-diusion equation (SCDE) driven by a stochastic forcing term that is spatially a Matern process. The approach is based on spectral methods for partial dierential equations and approximates a solution to the SCDE via a Fourier spectral decomposition. The resulting spectral processes are given by a family of uncoupled Ornstein-Uhlenbeck processes, for which computationally ecient statistical inference is possible based on the Kalman lter. We give veriable experimental results for all statistical problems - ltering, smoothing and parameter estimation - based on simulated data. We further derive a novel weak solution to the SCDE driven by spatial Matern noise for spatially periodic boundary conditions and show that the solution is indeed approximated by the Fourier spectral decomposition, thereby validating the statistical model. For the heat equation, we generalize the spectral ltering approach on compact Riemannian manifolds. Experimental results for this generalization are given on the two-dimensional unit sphere.Applied Mathematic
Designing a product-brand strategy for a coffee bean service
No full textThe coffee market is moving towards coffee preparation based on the whole bean in the household sector. Consumers are buying new machines and are looking for higher quality beans. At the same time, more and more appliances are becoming connected to the internet, and consumers are looking for holistic digital solutions. For appliance-oriented brands, such as Philips (PH), this raises crucial questions about the extent to which a brand can be extended into new product categories within the coffee market to provide holistic services to consumers. Research showed that the generation of “millennials” in particular should be addressed as a target segment: The group places high value on digital experiences and values high quality of coffee and beans. At the same time, it was identified that they have little confidence in broad appliance brands, such as PH, to offer a holistic coffee service that provides them with coffee beans. It is, therefore, necessary to offer a trustworthy experience through the creation of a new brand. To provide a trustworthy value-added brand experience, two key steps were identified. First, a new brand is needed that evokes desired brand associations in the coffee and coffee bean sector. Secondly, once this brand has become associated with high-quality coffee beans in the consumers’ minds, it is necessary to build a connected coffee machine app in collaboration between the new brand and the existing appliance brand (PH). The interaction of these two brands enables a trustworthy brand experience, including when offering desired features in the area of personalisation and bean recommendation.Strategic Product Desig
Zorro: Valid, sparse, and stable explanations in graph neural networks
No full textWith the ever-increasing popularity and applications of graph neural networks, several proposals have been made to explain and understand the decisions of a graph neural network. Explanations for graph neural networks differ in principle from other input settings. It is important to attribute the decision to input features and other related instances connected by the graph structure. We find that the previous explanation generation approaches that maximize the mutual information between the label distribution produced by the model and the explanation to be restrictive. Specifically, existing approaches do not enforce explanations to be valid, sparse, or robust to input perturbations. In this paper, we lay down some of the fundamental principles that an explanation method for graph neural networks should follow and introduce a metric RDT-Fidelity as a measure of the explanation's effectiveness. We propose a novel approach Zorro based on the principles from rate-distortion theory that uses a simple combinatorial procedure to optimize for RDT-Fidelity. Extensive experiments on real and synthetic datasets reveal that Zorro produces sparser, stable, and more faithful explanations than existing graph neural network explanation approaches.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Multimedia ComputingWeb Information System
Reconstruction of the 3D pressure field and energy dissipation of a Taylor droplet from a μ PIV measurement
No full textIn this study, we reconstruct the 3D pressure field and derive the 3D contributions of the energy dissipation from a 3D3C velocity field measurement of Taylor droplets moving in a horizontal microchannel (Ca c= 0.0050 , Re c= 0.0519 , Bo = 0.0043 , λ=ηdηc=2.625). We divide the pressure field in a wall-proximate part and a core-flow to describe the phenomenology. At the wall, the pressure decreases expectedly in downstream direction. In contrast, we find a reversed pressure gradient in the core of the flow that drives the bypass flow of continuous phase through the corners (gutters) and causes the Taylor droplet’s relative velocity between the faster droplet flow and the slower mean flow. Based on the pressure field, we quantify the driving pressure gradient of the bypass flow and verify a simple estimation method: the geometry of the gutter entrances delivers a Laplace pressure difference. As a direct measure for the viscous dissipation, we calculate the 3D distribution of work done on the flow elements, that is necessary to maintain the stationarity of the Taylor flow. The spatial integration of this distribution provides the overall dissipated energy and allows to identify and quantify different contributions from the individual fluid phases, from the wall-proximate layer and from the flow redirection due to presence of the droplet interface. For the first time, we provide deep insight into the 3D pressure field and the distribution of the energy dissipation in the Taylor flow based on experimentally acquired 3D3C velocity data. We provide the 3D pressure field of and the 3D distribution of work as supplementary material to enable a benchmark for CFD and numerical simulations. Graphical abstract: [Figure not available: see fulltext.]Fluid Mechanic
Plant Genome Editing – Policies and Governance
No full textThis eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contac
Simulating co-diffusion of innovations : feedback technology & behavioral change
No full textEnergie and Industri
Analysis of safety concepts for major events in Germany
No full textGegenstand der vorliegenden Bachelorarbeit ist eine Analyse der Bedeutung von Sicherheitskonzepten von Großveranstaltungen in ihrem jeweiligen Anwendungsgebiet. Die Arbeit konzentriert sich auf die Loveparade und diskutiert diese unter verschiedenen sicherheitsrelevanten Aspekten. Bei der Veranstaltung im Jahre 2010 in Duisburg sind insgesamt 21 Menschen ums Leben gekommen und viele Personen verletzt worden. Der Grund hierfür wird in der mangelnden Vorbereitung und Investition in Sicherheit vermutet. Es sind eine Vielzahl von Fehlern bei der Vorbereitung für dieses Fest und dessen Durchführung gemacht worden, doch bis heute ist es nicht möglich, einen Schuldigen und Verantwortlichen zu benennen. Diese Arbeit soll helfen, die Hintergründe der Tragödie zu verstehen, und beleuchtet, warum es wichtig ist, Sicherheitskonzepte bis ins Detail auszuarbeiten und anzuwenden. Der Vorfall wird im Kontext der rechtlichen Vorgaben unter Einbeziehung geeigneter Quellen noch einmal untersucht.The subject of this Bachelor thesis is the analysis of security and safety concepts when hosting major events. Based on the “Love Parade” in Duisburg of 2010 the author demonstrates that the disregard of appropriate security plans can lead to tragedies. In the particular case the organizers cut costs on security as well as they did not plan according to set standards. As a result, 21 people died and many more were injured. The assumption is that the master plan was not well reviewed and risks were either neglected or ignored. Many different parties participated in the planning of this event but still today none of the responsible persons has been convicted. In inclusion various
sources and legal requirements this incident will be analyzed. The review of this incident will help to clarify the reasons behind the tragedy and will show why it is impera-tive to work out, in detail, security concepts prior to hosting a major event
