Management of business processes is typically performed on multiple levels, each with different granularity, language constructs, and abstraction. Starting from an initial sketch of the activities to be performed, sev...
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Management of business processes is typically performed on multiple levels, each with different granularity, language constructs, and abstraction. Starting from an initial sketch of the activities to be performed, several refinements are made to entirely specify the business process, its artifacts, and participants. Then, information relevant for process execution can be added to enable efficient automation in the context of a service-oriented architecture (SOA). However, dealing with changes initiated by business or technology is a key difficulty in this approach. If change management is not performed properly then process models become out of sync which results in losing the alignment of business and IT. To address this challenge, we propose a synchronization method based on model element correspondence that considers change management between process models on different abstraction levels. We show how synchronization can be established and changes are propagated using a change queue for synchronization continuity. Finally we present a prototypical implementation of the key concepts.
Product innovations, accelerated product life cycles, globalization, and increased customer requirements are challenges of the automotive industry today. Original equipment manufacturers face these challenges in offer...
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ISBN:
(纸本)9789881925121
Product innovations, accelerated product life cycles, globalization, and increased customer requirements are challenges of the automotive industry today. Original equipment manufacturers face these challenges in offering multiple models, derivates, and options that affect the efficiency of processes and resources in logistics systems. To provide transparency over product variety-induced complexity, individual product variants, product variety and their impacts on logistics costs and performance need to be linked. Against this background, the authors develop an evaluation method to quantify these impacts focusing on the automotive logistics. This research provides a structured framework to account for impacts caused by product variety in order to support product variety decisions at an early stage in the product design phase. The method identifies relevant influences for measuring variant-driven complexity in logistics and highlights reciprocal effects among product variety, logistics costs and logistics performance. By integrating different logistics resources as well as dynamic factors, the research provides a unique evaluation approach in automotive logistics. Furthermore, the authors provide a case study proving the practicability.
Today's distributed embedded systems comprise various fields of application. Increasingly they are deployed in complex scenarios and must be able to adapt to changing environments and internal system changes. Such...
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Today's distributed embedded systems comprise various fields of application. Increasingly they are deployed in complex scenarios and must be able to adapt to changing environments and internal system changes. Such self-adaptive embedded systems pose great advantages in terms of flexibility, resource utilization, energy efficiency and robustness. The realization of these systems require enhanced development methods to incorporate the adaptation in the design. We introduce a novel concept for the model-driven development of self-adaptive embedded systems. The focus of our work is the definition and transfer of the information needed for the adaptation at runtime. This is preserved as so-called self-description of the components. We present our self-x profile, a modeling extension for describing the adaptation, and the respective design flow with built-in transformations. Furthermore, we outline the applicability of our methodology in an automotive use case.
This paper proposes a Green Light Optimized Speed Advisory (GLOSA) application implementation in a typical reference area, and presents the results of its performance analysis using an integrated cooperative ITS simul...
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This paper proposes a Green Light Optimized Speed Advisory (GLOSA) application implementation in a typical reference area, and presents the results of its performance analysis using an integrated cooperative ITS simulation platform. Our interest was to monitor the impacts of GLOSA on fuel and traffic efficiency by introducing metrics for average fuel consumption and average stop time behind a traffic light, respectively. For gathering the results we implemented a traffic scenario defining a single route through an urban area including two traffic lights. The simulations are varied for different penetration rates of GLOSA-equipped vehicles and traffic density. Our results indicate that GLOSA systems could improve fuel consumption and reduce traffic congestion in junctions.
Today many companies use several technologies, modeling languages, and software tools for designing, analyzing, and executing their business processes. The need for adapting processes to new requirements, to reuse par...
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Today many companies use several technologies, modeling languages, and software tools for designing, analyzing, and executing their business processes. The need for adapting processes to new requirements, to reuse parts of processes, and to involve different stakeholders in the process design leads to process changes on multiple process models of different granularity and level of abstraction. These changes cause a need for process models on different abstraction levels to be synchronized in order to avoid inconsistencies. To bridge the resulting Business IT gap, we introduce an approach which supports the creation and adaptation of business processes on different abstraction levels based on reusable process building blocks. The advantage of the approach is that changes of the process can be driven by IT and Business in the same manner, though on different levels of abstraction. In addition to the methodology for this approach, we define reusable process building blocks, describe sychronization mechanisms, and propose a supporting infrastructure. We show the application of these concepts in a real world case study.
A back-contact back-junction silicon solar cell is presented that was exclusively structured and metalized by screen-printing technology. On n-type base material the emitter was formed by locally printed and alloyed a...
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A back-contact back-junction silicon solar cell is presented that was exclusively structured and metalized by screen-printing technology. On n-type base material the emitter was formed by locally printed and alloyed aluminum structures in a co-firing process. By a varying emitter coverage on the rear the influence on the collection probability and thus the short-circuit current density is analyzed by light beam induced current (LBIC) measurements. Efficiencies of up to 20% were realized and independently confirmed by fraunhofer ISE CalLab. Two-dimensional simulations of the cell structure are performed and agree well with the processed cell. Variations of several parameters show room for further efficiency increase. Furthermore a new module concept for back-contact cells is presented where the metallization on cell level is point-shaped. The lateral conductance of collected carriers is enabled on module level by a structured printed circuit board. On the contacts an adhesive agent is screen-printed in order to make the aluminum contacts solderable. Afterwards a soldering paste is screen-printed which connects the cell and the printed circuit board or foil during a reflow process. This concept overcomes the restriction in cell size of back-contact back-junction modules due to thick copper layer.
First prototypes of bi-directional OLED microdisplay devices have been designed, that combine both display and camera functionality on a single CMOS chip (OLED-on-CMOS). Major aim of this integration is to provide cap...
First prototypes of bi-directional OLED microdisplay devices have been designed, that combine both display and camera functionality on a single CMOS chip (OLED-on-CMOS). Major aim of this integration is to provide capabilities for eye-tracking in see-through HMD to achieve gaze-based human-display-interaction, e.g. in augmented-reality applications.
This paper examines different aspects of power system observability and above all the placement of PMUs intended to make grids fully observable and thus improve state estimation. Different scenarios with varying numbe...
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