Droplet deformation by short laser-induced pressure pulses

When a free-falling liquid droplet is hit by a laser it experiences a strong ablation driven pressure pulse. Here we study the resulting droplet deformation in the regime where the ablation pressure duration is short, i.e. comparable to the time scale on which pressure waves travel through the droplet. To this end an acoustic analytic model for the pressure-, pressure impulse- and velocity fields inside the droplet is developed in the limit of small density fluctuations. This model is used to examine how the droplet deformation depends on the pressure pulse duration while the total momentum to the droplet is kept constant. Within the limits of this analytic model, we demonstrate that when the total momentum transferred to the droplet is small the droplet shape-evolution is indistinguishable from an incompressible droplet deformation. However, when the momentum transfer is increased the droplet response is strongly affected by the pulse duration. In this later regime, compressed flow regimes alter the droplet shape evolution considerably.Comment: Submitted to JF

Best practices in business process redesign: Use and impact

Purpose - This paper seeks to provide business process redesign (BPR) practitioners and academics with insight into the most popular heuristics to derive improved process designs. Design/methodology/approach - An online survey was carried out in the years 2003-2004 among a wide range of experienced BPR practitioners in the UK and The Netherlands. Findings - The survey indicates that this top ten of best practices is indeed extensively used in practice. Moreover, indications for their business impact have been collected and classified. Research limitations/implications - The authors\u27 estimations of best practices effectiveness differed from feedback obtained from respondents, possibly caused by the design of the survey instrument. This is food for further research. Practical implications - The presented framework can be used by practitioners to keep the various aspects of a redesign in perspective. The presented list of BPR best practices is directly applicable to derive new process designs. Originality/value - This paper addresses the subject of process redesign, rather than the more popular subject of process reengineering. As such, it fills in part an existing gap in knowledge. © Emerald Group Publishing Limited

Best practices in business process redesign: Use and impact

Purpose - This paper seeks to provide business process redesign (BPR) practitioners and academics with insight into the most popular heuristics to derive improved process designs. Design/methodology/approach - An online survey was carried out in the years 2003-2004 among a wide range of experienced BPR practitioners in the UK and The Netherlands. Findings - The survey indicates that this top ten of best practices is indeed extensively used in practice. Moreover, indications for their business impact have been collected and classified. Research limitations/implications - The authors\u27 estimations of best practices effectiveness differed from feedback obtained from respondents, possibly caused by the design of the survey instrument. This is food for further research. Practical implications - The presented framework can be used by practitioners to keep the various aspects of a redesign in perspective. The presented list of BPR best practices is directly applicable to derive new process designs. Originality/value - This paper addresses the subject of process redesign, rather than the more popular subject of process reengineering. As such, it fills in part an existing gap in knowledge. © Emerald Group Publishing Limited

Towards a methodology for the engineering of event-driven process applications

Successful applications of the Internet of Things such as smart cities, smart logistics, and predictive maintenance, build on observing and analyzing business-related objects in the real world for business process execution and monitoring. In this context, complex event processing is increasingly used to integrate events from sensors with events stemming from business process management systems. This paper describes a methodology to combine the areas and engineer an event-driven logistics processes application. Thereby, we describe the requirements, use cases and lessons learned to design and implement such an architecture

Biogeomorphological aspects of a model barrier island and its surroundings - Interactions between abiotic conditions and biota shaping the tidal and terrestrial landscape: A synthesis

Barrier islands occur in north-western Europe between the North Sea and the Wadden Sea along the coast of Denmark, Germany and the Netherlands. Geomorphological units such as dunes and salt marshes are built by wind, water and sediment. The biota also feed back to the units by trapping sand and silt, transported by water and wind thus (de)stabilizing the local substrate and are able to modify their own abiotic environment. Hence, we refer to them as biogeomorphological units, thus including the role of engineering biota. We consider seven units: tidal basin, island head, intertidal flats, dune arc complex, wash-over complex, island tail with salt marsh, and green beach. We focus on the well-studied West-Frisian island of Schiermonnikoog, the Netherlands, from which we integrated published data. The biogeomorphological units are built with bioengineering species, and in turn provide habitats for plant- and animal species. These communities are subject to succession until climax stages with various timescales. These temporal aspects are derived from long-term measurements in the field, including the study of chronosequences. Biogeomorphological units also affect each other, including feed-backs from animals, plants and micro-organisms. Based on that we present a conceptual model of this particular barrier island. Knowledge gaps that can be identified include 1) interactions among geomorphological units, 2) interactions among these units and bio-engineers to come to biogeomorphological units, and 3) multiple spatialtemporal scales. Human interference such as Aatmospheric deposition applies to all islands and is difficult to manage. Other human interferences may, however, differ among individual islands and their surroundings. They can be managed such as various intensities of fisheries, sand suppletion, extraction of groundwater, the attitude of local people towards artificial sand-drift dikes and livestock grazing

A Cross-Organizational Process Mining Framework for Obtaining Insights from Software Products: Accurate Comparison Challenges

Software vendors offer various software products to large numbers of enterprises to support their organization, in particular Enterprise Resource Planning (ERP) software. Each of these enterprises use the same product for similar goals, albeit with different processes and configurations. Therefore, software vendors want to obtain insights into how the enterprises use the software product, what the differences are in usage between enterprises, and the reasons behind these differences. Cross-organizational process mining is a possible solution to address these needs, as it aims at comparing enterprises based on their usage. In this paper, we present a novel Cross-Organizational Process Mining Framework which takes as input, besides event log, semantics (meaning of terms in an enterprise) and organizational context (characteristics of an enterprise). The framework provides reasoning capabilities to determine what to compare and how. Besides, the framework enables one to create a catalog of metrics by deducing diagnostics from the usage. By using this catalog, the framework can monitor the (positive) effects of changes on processes. An enterprise operating in a similar context might also benefit from the same changes. To accommodate these improvement suggestions, the framework creates an improvement catalog of observed changes. Later, we provide a set of challenges which have to be met in order to obtain the inputs from current products to show the feasibility of the framework. Next to this, we provide preliminary results showing they can be met and illustrate an example application of the framework in cooperation with an ERP software vendor

Adaptive Workflow Design Based on Blockchain

Increasingly, organizational processes have become more complex. There is a need for the design of workflows to focus on how organizations adapt to emergent processes while balancing the need for decentralization and centralization goal. The advancement in new technologies especially blockchain provides organizations with the opportunity to achieve the goal. Using blockchain technology (i.e. smart contract and blocks of specified consensus for deferred action), we leverage the theory of deferred action and a coordination framework to conceptually design a workflow management system that addresses organizational emergence (e-WfMS). Our artifact helps managers to predict and store the impact of deferred actions. We evaluated the effectiveness of our system against a complex adaptive system for utility assessment

Management of multi-language business processes with "AProMoRe"

International audienceAPROMORE (Advanced PROocess MOdel REpository) is an open and extensible plat- form meant to face the challenge of how to deal with an increasing number of business process models within or accross organisations

Management of multi-language business processes with "AProMoRe"

International audienceAPROMORE (Advanced PROocess MOdel REpository) is an open and extensible plat- form meant to face the challenge of how to deal with an increasing number of business process models within or accross organisations