| 1. |
- Blösch, Günter, et al.
(författare)
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Twenty-three unsolved problems in hydrology (UPH) - a community perspective
- 2019
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Ingår i: Hydrological Sciences Journal. - : Informa UK Limited. - 0262-6667 .- 2150-3435. ; 64:10, s. 1141-1158
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Tidskriftsartikel (refereegranskat)abstract
- This paper is the outcome of a community initiative to identify major unsolved scientific problems in hydrology motivated by a need for stronger harmonisation of research efforts. The procedure involved a public consultation through online media, followed by two workshops through which a large number of potential science questions were collated, prioritised, and synthesised. In spite of the diversity of the participants (230 scientists in total), the process revealed much about community priorities and the state of our science: a preference for continuity in research questions rather than radical departures or redirections from past and current work. Questions remain focused on the process-based understanding of hydrological variability and causality at all space and time scales. Increased attention to environmental change drives a new emphasis on understanding how change propagates across interfaces within the hydrological system and across disciplinary boundaries. In particular, the expansion of the human footprint raises a new set of questions related to human interactions with nature and water cycle feedbacks in the context of complex water management problems. We hope that this reflection and synthesis of the 23 unsolved problems in hydrology will help guide research efforts for some years to come.
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| 2. |
- Walker, Martin, et al.
(författare)
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Automatic Optimisation of System Architectures using EAST-ADL
- 2013
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Ingår i: Journal of Systems and Software. - : Elsevier BV. - 0164-1212 .- 1873-1228. ; 86:10, s. 2467-2487
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Tidskriftsartikel (refereegranskat)abstract
- There are many challenges which face designers of complex system architectures, particularly safety-critical or real-time systems. The introduction of architecture description languages (ADLs) has helped to meet these challenges by consolidating information about a system and providing a platform for modelling and analysis capabilities. However, managing this wealth of information can still be problematic, and evaluation of potential design decisions is still often performed manually. Automatic architectural optimisation can be used to assist this decision process, enabling designers to rapidly explore many different options and evaluate them according to specific criteria. In this paper, we present a multi-objective optimisation approach based on EAST-ADL, an ADL in the automotive domain, with the goal of combining the advantages of ADLs and architectural optimisation. The approach is designed to be extensible and leverages the capabilities of EAST-ADL to provide support for evaluation according to different factors, including dependability, timing/performance, and cost. The technique is applied to an illustrative example system featuring both hardware and software perspectives, demonstrating the potential benefits of this concept to the design of embedded system architectures.
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| 3. |
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| 4. |
- Berntsson, Lars-Olof, et al.
(författare)
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EAST-ADL 2.0 Specification
- 2008
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Rapport (refereegranskat)abstract
- This specification of the EAST ADL 2.0 is based on the EAST-ADL developed in the EAST EEA projectand has been further refined and harmonized with on-going modelling appraches in the automotiveindustry. It presents the modeling infrastructure, i.e. how the modeling elements should be represented inthe language and the UML representation. For each package a usage example is provided.The EAST-ADL 2.0 is harmonized with AUTOSAR.The metamodel and UML profile of EAST ADL 2.0 is defined in two steps: A domain (automotive)metamodel is defined, capturing only the domain specific needs of the language, without adding the UML2details. The basic concepts of UML are used for this purpose, such as classes, compositions andassociations. Based on the domain metamodel, a UML2 profile for the domain metamodel is defined,specifying stereotypes with properties and constraints.Comments on the content of this document are welcomed, and should be directed to .Please download the latest available specification and the XMI file ready for use in UML2 tools from the website.
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| 5. |
- Chen, DeJiu, et al.
(författare)
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Model integration in the development of embedded control systems - A characterization of current research efforts
- 2006
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Ingår i: 2006 IEEE Conference on Computer-Aided Control System Design, Vols 1 and 2. - : IEEE conference proceedings. - 9780780397972 ; , s. 283-289
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Konferensbidrag (refereegranskat)abstract
- The design of advanced embedded control systems requires a systematic approach in handling their increasing complexity and in particular integration of the different aspects and parts of a product worked on by different experts. Several variants of model-based approaches are today advocated to facilitate systems integration. This paper describes a number of representative efforts that address multiple concerns or views including modeling languages such as AADL and EAST-ADL as well as model integration environments such as GeneralStore, ToolNet, and Fujaba. We present a characterization of the approaches and thereby highlight their commonalities and differences regarding basic integration mechanisms and engineering support. We conclude with a prospect for future work.
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| 6. |
- Cuenot, Philippe, et al.
(författare)
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Developing Automotive Products Using the EAST-ADL2, an AUTOSAR Compliant Architecture Description Language
- 2008
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Ingår i: Proc. 4th European Congress ERTS (EMBEDDED REAL TIME SOFTWARE). - : SIA (Société des Ingénieurs de l'Automobile - French Automotive Engineers Society). ; :793
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Konferensbidrag (refereegranskat)abstract
- Current development trends in automotivesoftware feature increasing standardization of theembedded software structure. But it still remains thecritical issue of the overall engineering informationmanagement to control the system definition andmanage its complexity. System modeling based onan Architecture Description Language (ADL) is away to keep these assets within one informationstructure. The original EAST-ADL was developed inthe EAST-EEA project (www.east-eea.org) and basicconcepts were reused in the AUTOSARstandardization initiative. The original EAST-ADL iscurrently refined in the ATESST project(www.atesst.org) to EAST-ADL2. This paperpresents the results of the language extensionprovided by the EAST-ADL2 domain model andfocuses on its possible extension of the AUTOSARstandard to support decomposition of E/Eautomotive systems.
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| 7. |
- Cuenot, Philippe, et al.
(författare)
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Managing Complexity of Automotive Electronics Using the EAST-ADL
- 2007
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Ingår i: 12TH IEEE INTERNATIONAL CONFERENCE ON ENGINEERING COMPLEX COMPUTER SYSTEMS, PROCEEDINGS. - : IEEE Computer Society. - 0769528953 ; , s. 353-358
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Konferensbidrag (refereegranskat)abstract
- The complexity of embedded automotive systems calls for a more rigorous approach to system development compared to current state of practice. A critical issue is the management of the engineering information that defines the embedded system. Development time, cost efficiency, quality and dependability all benefit from appropriate information management. System modeling based on an architecture description language is a way to keep the engineering information within one information structure. The EAST-ADL was developed in the EAST-EEA project (www.easteea.net) and is an architecture description language for automotive embedded systems. It is currently refined in the ATESSTproject (www.atesst.org). This paper gives an overview of the EAST-ADL and accounts for some recent refinements as developed in the ATESST project. Areas covered include the relation to other standardization initiatives such as UML2.0, AADL, AUTOSAR, SysML, Marte profile, requirements management and variability.
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| 8. |
- Papadopoulos, Yiannis, et al.
(författare)
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Automatic allocation of safety integrity levels
- 2010
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Ingår i: Proceedings of the 1st Workshop on Critical Automotive applications. - New York : Association for Computing Machinery (ACM). - 9781605589152 ; , s. 7-10
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Konferensbidrag (refereegranskat)abstract
- In this paper, we describe a concept for the automatic allocationof general Safety Integrity Levels (SILs) to subsystems andcomponents of complex hierarchical networked architectures thatdeliver sets of safety critical functions. The concept is generic andcan be adapted to facilitate the safety engineering approachdefined in several standards that employ the concept of integrityor assurance levels including ISO 26262, the emergingautomotive safety standard. SIL allocation is facilitated by HiPHOPS,an automated safety analysis tool, and can be performed inthe context of development using EAST-ADL2, an automotivearchitecture description language. The process rationalizescomplex risk allocation and leads to optimal/economic allocationof SILs.
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| 9. |
- Shi, Jianlin, et al.
(författare)
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Combined usage of UML and Simulink in the Design of Embedded Systems : Investigating Scenarios and Structural and Behavioural Mapping
- 2007
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Ingår i: On the 4th workshop of ObjectorientedModeling of Embedded Real-time Systems, Paderborn, Germany, Oct. 2007.
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Konferensbidrag (refereegranskat)abstract
- The multidisciplinary nature of advanced embed-ded systems requires a combined usage of several tools and modeling languages in systems develop-ment. We investigate the needs and some of the pos-sibilities in simultaneous usage of Matlab/Simulink and UML. Structural and behavioral mappings are explored considering the needs for models at differ-ent abstraction level as well as environment models. The representation and mapping between behavioral models, including discrete-time, event-triggered, and continuous time systems is of special concern and solutions are discussed
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| 10. |
- Sjöstedt, Carl-Johan, et al.
(författare)
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Developing Dependable Automotive Embedded Systemsusing the EAST-ADL; representing continuous timesystems in SysML
- 2007
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Ingår i: EOOLT 2007 - Proceedings of the 1st International Workshop on Equation-Based Object-Oriented Languages and Tools, In Conjunction with ECOOP 2007. ; , s. 25-36
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Konferensbidrag (refereegranskat)abstract
- The architectural description language for automotive embedded systems EAST-ADL is presented in this paper. The aim of the EAST-ADL language is to provide a comprehensive systems modeling approach as a means to keep the engineering information within one structure. This facilitatessystems integration and enables consistent systems analysis. The EAST-ADL encompasses structural information at different abstraction levels, requirements and variability modeling. The EAST-ADL is implemented as a UML2 profileand is harmonized with AUTOSAR and a subset of SysML. Currently, differentways to model behavior natively in the language are investigated. An approachfor using SysML parametric diagrams to describe equations in composed physical systems is proposed. An example system is modeled and discussed. Itis highlighted that parametric diagrams lacks support for separation between effort and flow variables, and why this separation would be desired in order tomodel composed physical systems. An alternative approach by use of SysML activity diagrams is also discussed.
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