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Modular and incremental global model management with extended generalized discrimination networks
Complex projects developed under the model-driven engineering paradigm nowadays often involve several interrelated models, which are automatically processed via a multitude of model operations. Modular and incremental construction and execution of such networks of models and model operations are required to accommodate efficient development with potentially large-scale models. The underlying problem is also called Global Model Management. In this report, we propose an approach to modular and incremental Global Model Management via an extension to the existing technique of Generalized Discrimination Networks (GDNs). In addition to further generalizing the notion of query operations employed i...
Human pose estimation for decubitus prophylaxis
Decubitus is one of the most relevant diseases in nursing and the most expensive to treat. It is caused by sustained pressure on tissue, so it particularly affects bed-bound patients. This work lays a foundation for pressure mattress-based decubitus prophylaxis by implementing a solution to the single-frame 2D Human Pose Estimation problem. For this, methods of Deep Learning are employed. Two approaches are examined, a coarse-to-fine Convolutional Neural Network for direct regression of joint coordinates and a U-Net for the derivation of probability distribution heatmaps. We conclude that training our models on a combined dataset of the publicly available Bodies at Rest and SLP data yields t...
HPI Future SOC Lab – Proceedings 2018
The “HPI Future SOC Lab” is a cooperation of the Hasso Plattner Institute (HPI) and industry partners. Its mission is to enable and promote exchange and interaction between the research community and the industry partners. The HPI Future SOC Lab provides researchers with free of charge access to a complete infrastructure of state of the art hard and software. This infrastructure includes components, which might be too expensive for an ordinary research environment, such as servers with up to 64 cores and 2 TB main memory. The offerings address researchers particularly from but not limited to the areas of computer science and business information systems. Main areas of research include cloud computing, parallelization, and In-Memory technologies. This technical report presents results of research projects executed in 2018. Selected projects have presented their results on April 17th and November 14th 2017 at the Future SOC Lab Day events.
Distributed Applications and Interoperable Systems
This book constitutes the proceedings of the 18th IFIP International Conference on Distributed Applications and Interoperable Systems, DAIS 2018, held in Madrid, Spain, in June 2018. The 10 papers presented together with 2 short papers in this volume were carefully reviewed and selected from 33 submissions. The papers are organized in topical sections on application domains, including stream processing, video dissemination, storage, privacy protection, and large-scale orchestration.
Triple graph grammars for multi-version models
Like conventional software projects, projects in model-driven software engineering require adequate management of multiple versions of development artifacts, importantly allowing living with temporary inconsistencies. In the case of model-driven software engineering, employed versioning approaches also have to handle situations where different artifacts, that is, different models, are linked via automatic model transformations. In this report, we propose a technique for jointly handling the transformation of multiple versions of a source model into corresponding versions of a target model, which enables the use of a more compact representation that may afford improved execution time of both the transformation and further analysis operations. Our approach is based on the well-known formalism of triple graph grammars and a previously introduced encoding of model version histories called multi-version models. In addition to showing the correctness of our approach with respect to the standard semantics of triple graph grammars, we conduct an empirical evaluation that demonstrates the potential benefit regarding execution time performance.
HPI Future SOC Lab – Proceedings 2019
EN The “HPI Future SOC Lab” is a cooperation of the Hasso Plattner Institute (HPI) and industry partners. Its mission is to enable and promote exchange and interaction between the research community and the industry partners. The HPI Future SOC Lab provides researchers with free of charge access to a complete infrastructure of state of the art hard and software. This infrastructure includes components, which might be too expensive for an ordinary research environment, such as servers with up to 64 cores and 2 TB main memory. The offerings address researchers particularly from but not limited to the areas of computer science and business information systems. Main areas of research include...
Implementing a crowd-sourced picture archive for Bad Harzburg
Pictures are a medium that helps make the past tangible and preserve memories. Without context, they are not able to do so. Pictures are brought to life by their associated stories. However, the older pictures become, the fewer contemporary witnesses can tell these stories. Especially for large, analog picture archives, knowledge and memories are spread over many people. This creates several challenges: First, the pictures must be digitized to save them from decaying and make them available to the public. Since a simple listing of all the pictures is confusing, the pictures should be structured accessibly. Second, known information that makes the stories vivid needs to be added to the pictur...
Digital sovereignty
Digital technology offers significant political, economic, and societal opportunities. At the same time, the notion of digital sovereignty has become a leitmotif in German discourse: the state’s capacity to assume its responsibilities and safeguard society’s – and individuals’ – ability to shape the digital transformation in a self-determined way. The education sector is exemplary for the challenge faced by Germany, and indeed Europe, of harnessing the benefits of digital technology while navigating concerns around sovereignty. It encompasses education as a core public good, a rapidly growing field of business, and growing pools of highly sensitive personal data. The report describes pathways to mitigating the tension between digitalization and sovereignty at three different levels – state, economy, and individual – through the lens of concrete technical projects in the education sector: the HPI Schul-Cloud (state sovereignty), the MERLOT data spaces (economic sovereignty), and the openHPI platform (individual sovereignty).
No Free Lunch
“Everyone who is successful, regardless of age, race, or ethnicity, at some point in their lives received an opportunity. Someone believed in them enough to give them a chance.”These are the words of Rodney Carroll, one of America’s most innovative minds and a leading architect of the welfare to work movement. They encapsulate his inspiring memoir,No Free Lunch, the story of a man who rose to the top–and returned to bring millions of people along with him. Raised in an area both economically and emotionally depressed, Rodney and his siblings were forced onto welfare after Rodney’s alcoholic and abusive mother was declared unfit to raise her children. Though lured by gangs that aime...
Funkelnde Leseperlen: Leseproben und Gedichte von CD Sanders
Liebe Leser! Ich bin eine Autorin aus Deutschland. Ja, tatsächlich! Warum immer ausländische Schriftsteller lesen, wenn es in Deutschland auch gute Schreiberlinge gibt? Hier möchte ich euch meine Projekte vorstellen: Eine Frau, die vom Opfer zur Kämpferin wird. Eine Welt, in der man nur staunen kann. Eine Geschichte, in der die Menschen auf Außerirdische treffen. Einen Verschwörungsthriller a la Akte X. Als Bonus ein paar ausgewählte Gedichte der Autorin aus ihrem Gedichteband: "Der Zauber kann beginnen" Das Buch der Liebe - ist nun zu Ende Es ist Zeuge - eines Lebensabschnittes Das letzte Kapitel - ist geschrieben Das Buch der Liebe - wird zugeschlagen Eine alte Geschichte - wird neu begonnen Mit alten Helden - neu erlebt Sie gehen jetzt - getrennte Wege Jedes Kapitel - für sich erzählt Das Buch der Liebe - steht im Regal Die Worte auf ewig - festgehalten Es war - eine schöne Zeit die ihnen niemand - nehmen kann Die unendliche Geschichte - schreiben sie nun jeder für sich allein... Darf ich euch für kurze Zeit in eine andere Welt entführen? Dann kommt und tretet ein...
