Formoptimierte filigrane Stäbe aus UHPC und korrosionsfreier CFK-Bewehrung für variable räumliche Stabtragwerke

Die Vision bei diesem Projekt bestand darin, zukünftig anstelle massiver Betontragsysteme mit meist ungleichmäßiger Materialausnutzung am Kraftfluss orientierte, filigrane, stabartige Tragwerke zu entwerfen, die sich neben der Gewichtsreduktion und einer höheren Transparenz auch durch eine bessere Ressourcennutzung auszeichnen. Dabei wurde eine modulare Bauweise angestrebt, bei der die Einzelkomponenten Druckstab und vorgespannter Zugstab sowie Teile des Verbindungsknotenelements vorgefertigt und am Einsatzort zusammengefügt werden. Sowohl im Hinblick auf die Tragfähigkeits- und Verbundeigenschaften als auch auf die Dauerhaftigkeit sollten die Stäbe aus faserverstärktem Ultrahochleistungsbeton (UHPFRC) hergestellt sowie ausschließlich mit nichtmetallischen Elementen aus faserverstärkten Kunststoffen (FVK) bewehrt bzw. vorgespannt werden. Im geförderten Zeitraum lag das Hauptaugenmerk auf der Entwicklung filigraner, formoptimierter Druck- und vorgespannter Zugstäbe. Zum Knotenelement wurden theoretische Überlegungen sowie erste Tastversuche angestellt. [Aus: Projektidee und Zielsetzung]The vision of this project was to replace massive concrete structures with mostly inhomogeneous material utilization in the future by designing filigree concrete truss supporting structures in accordance with the principle form follows force instead. Thus, besides weight reduction and a higher transparency also a higher resource efficiency can be achieved. A modular construction method, in which the components compression strut, prestressed tie and connection joint elements are prefabricated and joined together at the construction site, was aspired. With regard to load-bearing capacity and bonding behaviour as well as durability, the struts and ties are made of Ultra-High Performance Fibre-Reinforced Concrete (UHPFRC) and are reinforced or prestressed exclusively with non-metallic elements made of f bre-reinforced polymers (FRP). Within the funding period, the focus was on the development of f ligree, shape-optimized struts and prestressed ties. Regarding the connection joint element, theoretical considerations were made and first basic tests were carried out. [Off: Vision and objective

Framework for the usage of data from real-time indoor localization systems to derive inputs for manufacturing simulation

Discrete event simulation is becoming increasingly important in the planning and operation of complex manufacturing systems. A major problem with today’s approach to manufacturing simulation studies is the collection and processing of data from heterogeneous sources, because the data is often of poor quality and does not contain all the necessary information for a simulation. This work introduces a framework that uses a real-time indoor localization systems (RTILS) as a central main data harmonizer, that is designed to feed production data into a manufacturing simulation from a single source of truth. It is shown, based on different data quality dimensions, how this contributes to a better overall data quality in manufacturing simulation. Furthermore, a detailed overview on which simulation inputs can be derived from the RTILS data is given

A Vision of Digitalization in Supply Chain Management and Logistics

Digitalization requires a new form of management to master the transformation process of corporations and companies. The Dortmund Management Model structures the focus areas of the digital transformation along the management tasks goal, planning, decision, realization and monitoring as well as the common socio-technical subsystems technological, organizational and personnel - enriched by a fourth dimension: information. Additionally, the acceleration factors transformation, migration and change management are taken into account. This paper embraces a vision for a persistent management of production and supply chain networks in order to achieve a holistic Management 4.0. The emerging developments of technology, methods, tools and models in production and supply chain research are connected and merged into a big picture of digital supply chain management and logistics. The interfaces between management tasks show specific characteristics of digital business processes in particular, which are hereinafter exemplarily outlined: New business models and value-creation networks are based on adaption intelligent production systems, which are interconnected with digital models for continuous planning and reconfiguration. At the shop floor and between sites orders are completed by autonomous guided vehicles (AGV) with intelligent load carriers. Decentralized negotiations and decisions across company boundaries concluded with smart contracts are enabling reasonable and sustainable distribution of the value creation processes. Humans are still in the center of action – abilities are developed by integrated competence management, new learning approaches and human-centered assistance systems coupled with AI-based decision-making support. New types of organizations allow a synergetic collaboration of humans and machines. The benefit of integrating new production and transport technologies becomes assessable and accelerates the ongoing renewal of existing networks. This paper provides an overview of possible potential and connecting factors by linking different technological developments towards supply chain, logistics, production and management research and shows further research demands

Realization and Extension of the Xfrog Approach for Plant Modelling in the Graph-Grammar Based Language XL

Two well-known approaches for modelling virtual vegetation are grammar-based methods (L-systems) and the Xfrog method, which is based on graph transformations expanding "multiplier" nodes. We show that both approaches can be unified in the framework of "relational growth grammars", a variant of parallel graph grammars. We demonstrate this possibility and the synergistic benefits of the combination of both methods at simple plant models which were processed using our open-source software GroIMP

Using a Full Spectral Raytracer for Calculating Light Microclimate in Functional-Structural Plant Modelling

Raytracers that allow the spatially explicit calculation of the fate of light beams in a 3D scene allow the consideration of shading, reflected and transmitted light in functional-structural plant models (FSPM). However, the spectrum of visible light also has an effect on cellular and growth processes. This recently created the interest to extend this modelling paradigm allowing the representation of detailed spectra instead of monochromatic or white light and to extend existing FSPM platforms accordingly. In this study a raytracer is presented which supports the full spectrum of light and which can be used to compute spectra from arbitrary light sources and their transformation at the organ level by absorption, reflection and transmission in a virtual canopy. The raytracer was implemented as an extension of the FSPM platform GroIMP

Search for Microscopic Black Holes in Early Data with the ATLAS Detector at the LHC

With the start of the LHC in 2010 a new era in Particle Physics has begun. In a yet unexplored kinematic regime, the Standard Model can be probed and new physics can be discovered with the ATLAS detector. In this work the search for microscopic black holes at the LHC is presented. Their discovery would unveil the existence of large extra dimensions. Theories of such, establishing low-scale gravity, address problems of the Standard Model like the hierarchy problem. Different search strategies are discussed, which are aimed at an early discovery with the centre-of-mass energies provided by the LHC. They exploit key features of the decay of black holes, namely high mass final states with a large multiplicity of objects with high pT. With the first 297 1/nb of sqrt(s) = 7TeV data, a search for such new physics is conducted. No deviations from Standard Model predictions are found, and consequently a limit on the cross section times acceptance of sigma × A < 0.46 nb at 95% CL is set. Theory predictions for the cross section are of the order O(10 - 100 pb), hence this result has an impact on theories of low-scale gravity

Patterns of utilization and clinical adoption of 0.35 Tesla MR-guided radiation therapy in the United States - Understanding the transition to adaptive, ultra-hypofractionated treatments

PURPOSE/OBJECTIVE: Magnetic resonance-guided radiation therapy (MRgRT) utilization is rapidly expanding worldwide, driven by advanced capabilities including continuous intrafraction visualization, automatic triggered beam delivery, and on-table adaptive replanning (oART). Our objective was to describe patterns of 0.35Tesla(T)-MRgRT (MRIdian) utilization in the United States (US) among early adopters of this novel technology. MATERIALS/METHODS: Anonymized administrative data from all US MRIdian treatment systems were extracted for patients completing treatment from 2014 to 2020. Detailed treatment information was available for all MRIdian linear accelerator (linac) systems and some cobalt systems. RESULTS: Seventeen systems at 16 centers delivered 5736 courses and 36,389 fractions (fraction details unavailable for 1223 cobalt courses), of which 21.1% were adapted. Ultra-hypofractionation (UHfx) (1-5 fractions) was used in 70.3% of all courses. At least one adaptive fraction was used for 38.5% of courses (average 1.7 adapted fractions/course), with higher oART use in UHfx dose schedules (47.7% of courses, average 1.9 adapted fractions per course). The most commonly treated organ sites were pancreas (20.7%), liver (16.5%), prostate (12.5%), breast (11.5%), and lung (9.4%). Temporal trends show a compounded annual growth rate (CAGR) of 59.6% in treatment courses delivered, with a dramatic increase in use of UHfx to 84.9% of courses in 2020 and similar increase in use of oART to 51.0% of courses. CONCLUSIONS: This is the first comprehensive study reporting patterns of utilization among early adopters of MRIdian in the US. Intrafraction MR image-guidance, advanced motion management, and increasing adoption of adaptive radiation therapy has led to a substantial transition to ultra-hypofractionated regimens. 0.3