| 1. |
- Alajrami, Sami, et al.
(författare)
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Cost-Aware Scheduling of Software Processes Execution in the Cloud
- 2018
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Ingår i: <em>Proceedings of the 6th International Conference on Model-Driven Engineering and Software Development - Volume 1</em>. - : SCITEPRESS - Science and Technology Publications. - 9789897582837 ; , s. 203-212
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Konferensbidrag (refereegranskat)abstract
- Using cloud computing to execute software processes brings several benefits to software development. In a previous work, we proposed a reference architecture, which treats software processes as workflows and uses cloud computing to execute them. Scheduling the execution in the cloud impacts the execution cost and the cloud resources utilization. Existing workflow scheduling algorithms target business and scientific (data-driven) workflows, but not software processes workflows. In this paper, we adapt three scheduling algorithms for our architecture and propose a fourth one; the Proportional Adaptive Task Schedule algorithm. We evaluate the algorithms in terms of their execution cost, makespan and cloud resource utilization. Our results show that our proposed algorithm saves between 19.74% and 45.78% of the execution cost and provides the best resource (virtual machine) utilization compared to the adapted algorithms while providing the second best makespan.
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| 2. |
- Alajrami, Sami, et al.
(författare)
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Enabling GSD Task Allocation via Cloud-based Software Processes
- 2017
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Ingår i: Software Engineering Research, Management and Applications SERA-2017. - Springer : Springer International Publishing. - 9783319613888 ; , s. 179-192
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Konferensbidrag (refereegranskat)abstract
- Allocating tasks to distributed sites in Global Software Development (GSD) projects is often done unsystematically and based on the personal experi- ence of project managers. Wrong allocation decisions increase the project’s risks as tasks have dependencies that are inherited by the distributed sites. Decision sup- port can help make the task allocation a more informed and systematic process. The challenges in allocating tasks to distributed sites exist because of three dis- tance dimensions between sites (geographical, temporal and cultural). An informed task allocation decision needs to consider these distances. Therefore, in this paper, we propose to integrate and semi-automate the calculation of an existing Global Distance Metric (GDM) into an architecture that supports executing cloud-based software processes. We analyze the potential of integrating the GDM into this archi- tecture and identify the needed extensions to the architecture.
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| 3. |
- Alajrami, Sami, et al.
(författare)
-
Enabling GSD Task Allocation via Cloud-based Software Processes
- 2017
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Ingår i: International Journal of Networked and Distributed Computing. - : Springer Science and Business Media LLC. - 2211-7938 .- 2211-7946. ; 5:4, s. 221-232
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Tidskriftsartikel (refereegranskat)abstract
- Allocating tasks to distributed sites in Global Software Development (GSD) projects is often done unsystematically and based on the personal experience of project managers. Wrong allocation decisions increase the project’s risks as tasks have dependencies that are inherited by the distributed sites. Decision support can help make the task allocation a more informed and systematic process. The challenges in allocating tasks to distributed sites exist because of three distance dimensions between sites (geographical, temporal and cultural). An informed task allocation decision needs to consider these distances. Therefore, in this paper, we propose to integrate and semi-automate the calculation of an existing Global Distance Metric (GDM) into an architecture that supports executing cloud-based software processes. We analyze the potential of integrating the GDM into this architecture and identify the needed extensions to the architecture.
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| 4. |
- Alajrami, S., et al.
(författare)
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EXE-SPEM : Towards cloud-based executable software process models
- 2016
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Ingår i: MODELSWARD 2016 - Proceedings of the 4th International Conference on Model-Driven Engineering and Software Development. - : SCITEPRESS - Science and and Technology Publications. - 9789897581687 ; , s. 517-526
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Konferensbidrag (refereegranskat)abstract
- Executing software processes in the cloud can bring several benefits to software development. In this paper, we discuss the benefits and considerations of cloud-based software processes. EXE-SPEM is our extension of the Software and Systems Process Engineering (SPEM2.0) Meta-model to support creating cloud-based executable software process models. Since SPEM2.0 is a visual modelling language, we introduce an XML notation meta-model and mapping rules from EXE-SPEM to this notation which can be executed in a workflow engine. We demonstrate our approach by modelling an example software process using EXE-SPEM and mapping it to the XML notation.
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| 5. |
- Alajrami, S., et al.
(författare)
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Software development in the Post-PC era : Towards software development as a service
- 2016
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Ingår i: Lect. Notes Comput. Sci.. - Cham : Springer International Publishing. - 9783319490939 ; , s. 662-671
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Konferensbidrag (refereegranskat)abstract
- Over the years, software development has evolved to meet the needs of new types of applications and to embrace new technological disruptions. Today, we witness the rise of mobility where the role of the conventional high-end PC is declining. Some refer to this era as the Post- PC era. This technological shift, powered by a key enabling technology, cloud computing, has opened new opportunities for human advancement. Consequently, the evolving landscape of software systems drives the need for new methods for conceiving them. Such methods need to: (a) address the challenges and requirements of this era and (b) embrace the benefits of new technological breakthroughs. In this paper, we list the characteristics of the Post-PC era from the software development perspective and describe two motivating trends of software development processes. Then, we derive a list of requirements for the future software development from the characteristics of the Post-PC era and from the motivating trends. Finally, we propose a reference architecture for cloud-based software process enactment as an enabler for Software Development as a Service. The architecture is the first step addressing the needs that we have identified.
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| 6. |
- Alajrami, S., et al.
(författare)
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Towards cloud-based enactment of safety-related processes
- 2016
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Ingår i: Lecture Notes in Computer Science, vol. 9922. - Cham : Springer International Publishing. - 9783319454764 ; , s. 309-321
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Konferensbidrag (refereegranskat)abstract
- Engineering safety-critical systems is a complex task which involves multiple stakeholders. It requires shared and scalable computation to systematically involve geographically distributed teams. The paper proposes a model-driven cloud-based enactment architecture automating safety-critical processes. This work adapts our previous work on cloud-based software engineering by enriching the architecture with an automatic support for generation of both, product-based safety arguments from failure logic analysis results and process-based arguments from the process model and the enactment data. The approach is demonstrated using a fragment of a process adapted from the aerospace domain.
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| 7. |
- Alemzadeh, H., et al.
(författare)
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Message from the WoSoCer 2018 Workshop Chairs
- 2018
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Ingår i: Proceedings - 29th IEEE International Symposium on Software Reliability Engineering Workshops, ISSREW 2018. - : Institute of Electrical and Electronics Engineers Inc.. - 9781538694435
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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| 8. |
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| 9. |
- Ayala, Inmaculada, et al.
(författare)
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Towards Tool-based Security-informed Safety Oriented Process Line Engineering
- 2016
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Ingår i: 1st International workshop on Interplay of Security, Safety and System/Software Architecture ISSA-2016. - New York, NY, USA : ACM. - 9781450347815
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Konferensbidrag (refereegranskat)abstract
- For the purpose of certification, manufactures of nowadays highly connected safety-critical systems are expected to en- gineer their systems according to well-defined engineering processes in compliance with safety and security standards. Certification is an extremely expensive and time-consuming process. Since safety and security standards exhibit a certain degree of commonality, certification-related artifacts (e.g., process models) should to some extent be reusable. To en- able systematic reuse and customization of process infor- mation, in this paper we further develop security-informed safety-oriented process line engineering (i.e., engineering of sets of processes including security and safety concerns). More specifically, first we consider three tool-supported ap- proaches for process-related commonality and variability man- agement and we apply them to limited but meaningful por- tions of safety and security standards within airworthiness. Then, we discuss our findings. Finally, we draw our conclu- sions and sketch future work.
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| 10. |
- Bibbo, D., et al.
(författare)
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A Novel Physiological-Based System to Assess Drivers’ Stress during Earth Moving Simulated Activities
- 2022
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Ingår i: Electronics. - : MDPI. - 2079-9292. ; 11:24
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Tidskriftsartikel (refereegranskat)abstract
- Earth-moving vehicles (EMVs) are vital in numerous industries, including construction, forestry, mining, cleaning, and agriculture. The changing nature of the off-road environment in which they operate makes situational awareness for readiness and, consequently, mental stress crucial for drivers and requires a high level of controllability. Therefore, the monitoring of drivers’ acute stress patterns may be used as an input in identifying various levels of attentiveness. This research presents an experimental evaluation of a physiological-based system that can be useful to evaluate the readiness of a driver in different conditions. For the experimental validation, physiological signals such as electrocardiogram (ECG), galvanic skin response (GSR) and speech data were collected from nine participants throughout driving experiments of increasing complexity on a specific simulator. The experimental results show that the identified parameters derived from the acquired physiological signals can help us understand the driver status when performing different tasks, the engagement of which is related to different road environments. This multi-parameter approach can provide more reliable information compared to single parameter approaches (e.g., eye monitoring with a camera) and identify driver status variations, from relaxed to stressed or drowsy. The use of these signals allows for the development of a smart driving cockpit, which could communicate to the vehicle the driver’s status, to set up an innovative protection system aiming to increase road safety.
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