Pervasive computing systems can be modeled effectively as populations of interacting autonomous components. The key challenge to realizing such models is in getting separately-specified and -developed sub-systems to discover and interoperate with each other in an open and extensible way, supported by appropriate middleware services. In this paper, we argue that nature-inspired coordination models offer a promising way of addressing this challenge. We first frame the various dimensions along which nature-inspired coordination models can be defined, and survey the most relevant proposals in the area. We describe the nature-inspired coordination model developed within the SAPERE project as a synthesis of existing approaches, and show how it can effectively support the multifold requirements of modern and emerging pervasive services. We conclude by identifying what we think are the open research challenges in this area, and identify some research directions that we believe are promising.

In this study, various methods to study individual electrodes in polymer electrolyte membrane cells are reviewed and a novel reference electrode design is developed for a laboratory scale single cell polymer electrolyte membrane water electrolyser. The design uses an internal pseudo-reference electrode which is proven to enable galvanostatic electrochemical impedance spectroscopy studies. The setup is used to study the state-of-the-art electrode materials with high loadings in a start-stop cycling durability test. The cycled catalyst layers are characterized ex-situ with SEM, TEM and XRD. As a result, on the anode the mass transport resistance increases, the macro porosity increases and a structural change from amorphous IrO x toward crystalline IrO 2 is detected. On the cathode the platinum particle size increases and an intensifying corrosion phenomenon is detected. In overall, this degradation has still low effect on the full cell performance during the studied 1750 hours. However, there is a clear indication that if the start-stop cycling is further continued, the cell will experience a dramatic performance loss much sooner than when operating it in a constant current mode.

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The paper focuses on comparative experiment on manufacturing and inspection of two different prismatic one-off parts, which have different complexity. Our experiment shows that transforming product definition method from the Drawing Centric Definition (DCD) to the Model Centric Definition (MCD) enables 28%-29% time savings in manufacturing and inspection phases of machined one-off part's life cycle. Furthermore, transition from MCD to Model-Based Definition (MBD) enables 5%-9% time savings, respectively. Applying of MBD enables more time savings in complex part compared to a less complex part.

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Model-Based Definition provides several benefits for communicating between engineering and other downstream stakeholders. Particularly, semantic PMI information included in 3D models benefits both CAM programming and inspection phases. However, the efficiency of generating CAM- and CAI codes automatically according to the semantic PMI information varies due to the compatibility of different systems. This paper focuses on the experiment that we made on inspecting three different parts with the Coordinate Measuring Machine (CMM). We compared four different programming methods and found that the efficiency of inspecting depends on the serial size of the parts. The completely automatic CAI-programming method does not necessarily produce the most effective CAI code compared to the competent human programmer. This is notable, especially in large series due to achieved cumulative time savings in the inspection of each part. With small series, fully automatic PMI method and human-assisted automatic PMIfp method provide significant benefits in the inspection process due to time savings in CAI-programming work.

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