Reading and writing is modelled in CSP using actions containing the sym- bols ? and !. These reading and writing actions are synchronous and there is a one- to-one relationship between occurrences of pairs of these actions. It is cumbersome to ease the restriction of synchronous execution of the read and write actions. For this reason we introduce the half-asynchronous parallel operator that acts on actions con- taining the symbols ¿ and ¡ and study the impact on a Vertex Removing Synchronised Product.
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Reading and writing is modelled in CSP using actions containing the symbols ? and !. These reading actions and writing actions are synchronous, and there is a one-to-one relationship between occurrences of pairs of these actions. In the CPA conference 2016, we introduced the half-synchronous alphabetised parallel operator X ⇓ Y , which disconnects the writing to and reading from a channel in time. We introduce in this paper an extension of X ⇓ Y , where the definition of X ⇓ Y is relaxed; the reading processes are divided into sets which are set-wise asynchronous, but intra-set-wise synchronous, giving full flexibility to the asynchronous writes and reads. Furthermore, we allow multiple writers to the same channel and we study the impact on a Vertex Removing Synchronised Product. The advantages we accomplish are that the extension of X ⇓ Y gives more flexibility by indexing the reading actions and allowing multiple write actions to the same channel. Furthermore, the extension of X ⇓Y reduces the end-to-end processing time of the processor or coprocessor in a distributed computing system. We show the effects of these advantages in a case study describing a Controlled Emergency Stop for a processor-coprocessor combination.
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Reading and writing is modelled in CSP using actions containing the symbols ? and !. These reading actions and writing actions are synchronous, and there is a one-to-one relationship between occurrences of pairs of these actions. In the CPA conference 2017, we introduced the extended half-synchronous al- phabetised parallel operator X ⇕ Y , which disconnects the writing to and reading from a channel in time; the reading processes are divided into sets which are set-wise asynchronous, but intra-set-wise synchronous, giving full flexibility to the reads. In this paper, we allow multiple writers to write to the same channel set-wise asynchronously, but intra-set-wise synchronously and we study the impact on our (Extended) Vertex Removing Synchronised Product. The advantages we accomplish are that the extension of X ⇕ Y gives more flexibility by indexing the writing actions and the reading actions, leading to a straightforward majority vote design. Furthermore, the extension of X ⇕ Y preserves the advantages of the X ⇕ Y operator.
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In this paper, the performance gain obtained by combining parallel peri- odic real-time processes is elaborated. In certain single-core mono-processor configurations, for example, embedded control systems in robotics comprising many short processes, process context switches may consume a considerable amount of the available processing power. For this reason, it can be advantageous to combine processes, to reduce the number of context switches and thereby increase the performance of the application. As we consider robotic applications only, often consisting of processes with identical periods, release times and deadlines, we restrict these configurations to periodic real-time processes executing on a single-core mono-processor. By graph-theoretical concepts and means, we provide necessary and sufficient conditions so that the number of context switches can be reduced by combining synchronising processes.
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USE conference paper.Ever since the mid-1970s a multitude of studies linking corporate sustainability performance (CSP) measures and financial performance measures have been conducted. Until today a plethora of corporate sustainability performance measures heve been developed. A universally accepted CSP definition of construct does not (yet) exist. Since we don't exactley know what CSP entails, CSP measures should (at least) be considered conceptually flawed for that matter. These measures may measure CSP, but it cannot e excluded that other (overarching) phenomena are measured. There are leads suggesting that CSP measures are reflections or representations of corporate culture, suggesting that corporate culture drives FP. If so, managers should not focus on increasing CSP to boost FP, but create a high culture for sustainability If corporate culture drives financial performance, the investment community can also benefit through improving its decision making processes by including CSP measures that reflect corporate culture.
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Nonprofit organizations (NPOs) have deployed various strategies in motivating businesses to source sustainably, such as the co-development and promotion of sustainability certification and direct collaboration in cross-sector partnerships (CSPs). This is an important current-day priority, given the ambitions set out in the Sustainable Development Goals (SDGs). Increasingly, NPOs have taken up a role as conveners of such CSPs. Research on CSPs has, to date, often considered conveners as a ‘resource’ to the CSP, contributing to its effectiveness. In this study, we shift the focus towards the convener by considering a case of a ‘mission-driven convener’, an NPO that initiates CSPs as a strategy to realize its own sustainability objectives. Our explorative case study—comparing the NPO’s efforts across six countries in setting up national coffee platforms—reviews the concept of a mission-driven convener vis-à-vis established notions on convening and identifies which strategies it applies to realize a CSP. These strategies comprise productively combining certification-driven efforts with CSPs, combining process and outcomes of CSPs, and drawing on cross-level dynamics derived from outsourcing of convening work to local actors. With our study, we contribute to research on CSP conveners by offering an alternative interpretation to the relation between the CSP and the convener, attributing more agency to the convener as a mission-driven organization. Strengthening our understanding of CSPs and conveners is an important means to advance the Sustainable Development Goals (SDGs).
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This article is about the effect of local tailored interventions to counter (violent) extremism, and therefore contributes to the academic and policy debates. It focusses on local, professional perspectives on person-specific interventions utilising a Dutch case study as the basis. The interventions are part of the wider-ranging counter terrorism policy that entails (local) measures that are deployed in relation to designated high-risk individuals and groups. By reviewing policy documents and conducting semi-structured interviews, the exploratory study concludes that the key factors for a hand-tailored intervention are a solid network, expert knowledge to assess potential signs of extremist ideology, an awareness of not having too many concurrent measures, good inter-institutional cooperation and information-sharing. The professionals involved felt that person-specific interventions have contributed to reducing the threat of religious extremism in the Netherlands. Nonetheless, municipal officials and security agents emphasised the importance of setting realistic goals and a focus on preventive rather than repressive measures. Furthermore, despite the central role that municipal actors play, they run up against problems such as cooperation within the security and care sector. National entities appear to emphasize information-gathering and monitoring more than community-focused cooperation. Thereby questioning whether, on the national level, local professionals are perceived as playing a key role in dealing with extremism.
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This article extends the corporate social performance (CSP) model by studying the role of governance structures and governance systems in shaping corporate social responsibility. The authors argue that a governance perspective offers a fruitful research strategy both to study empirically how firms balance the competing moral frameworks and political philosophies that are part and parcel of defining their role in society and to further the theoretical integration of the descriptive and normative perspectives in the business and society field. They illustrate the potential of this research strategy with a comparative case study of processes of responsiveness at four Dutch banks with markedly different governance structures. This study shows how governance systems and structures both enable and constrain corporate responsibility and responsiveness. The authors conclude with a proposal to reorient the CSP model to harness the integrative potential of studying corporate social responsibility through a governance lens.
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This article extends the corporate social performance (CSP) model by studying the role of governance structures and governance systems in shaping corporate social responsibility. The authors argue that a governance perspective offers a fruitful research strategy both to study empirically how firms balance the competing moral frameworks and political philosophies that are part and parcel of defining their role in society and to further the theoretical integration of the descriptive and normative perspectives in the business and society field. They illustrate the potential of this research strategy with a comparative case study of processes of responsiveness at four Dutch banks with markedly different governance structures. This study shows how governance systems and structures both enable and constrain corporate responsibility and responsiveness. The authors conclude with a proposal to reorient the CSP model to harness the integrative potential of studying corporate social responsibility through a governance lens.
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In bepaalde single-core configuraties met één processor, b.v. embedded control systems zoals robotic applications die uit vele korte processen bestaan, kunnen de context switches van een proces een aanzienlijke hoeveelheid van de beschikbare processing power verbruiken. Het verminderen van het aantal context switches vermindert de executietijd en verhoogt daardoor de prestaties van de toepassing. Bovendien is de end-to-end executietijd van de processen langer dan strict noodzakelijk, b.v. omdat de processen moeten wachten op controllers die een taak uitvoeren. Door de regels voor synchrone communicatie via kanalen in de procesalgebraïsche specificatietaal Communicating Sequential Processes te versoepelen, kunnen we de end-to-end executietijd verkorten. In ons onderzoek definiëren we verschillende graafproducten, bewijzen we dat deze producten een prestatiewinst opleveren (onder bepaalde voorwaarden) en we werken de numerieke en combinatorische aspecten van deze graafproducten uit.
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