scholarly journals A Breakdown of System of Systems Needs Using Architecture Frameworks, Ontologies and Description Logic Reasoning

Aerospace ◽  
2021 ◽  
Vol 8 (4) ◽  
pp. 118
Author(s):  
Ludvig Knöös Franzén ◽  
Ingo Staack ◽  
Petter Krus ◽  
Christopher Jouannet ◽  
Kristian Amadori
Keyword(s):  
Description Logic ◽  
Design Space ◽  
Singular System ◽  
System Of Systems ◽  
Space Representation ◽  
System Perspective ◽  
Initial Design ◽  
Architecture Framework ◽  
Architecture Frameworks ◽  
Logic Reasoning

Aerospace systems are connected with the operational environment and other systems in general. The focus in aerospace product development is consequently shifting from a singular system perspective to a System-of-Systems (SoS) perspective. This increasing complexity gives rise to new levels of uncertainty that must be understood and managed to produce aerospace solutions for an ever-changing future. This paper presents an approach to using architecture frameworks, and ontologies with description logic reasoning capabilities, to break down SoS needs into required capabilities and functions. The intention of this approach is to provide a consistent way of obtaining the functions to be realized in order to meet the overarching capabilities and needs of an SoS. The breakdown with an architecture framework results in an initial design space representation of functions to be performed. The captured knowledge is then represented in an ontology with description logic reasoning capabilities, which provides a more flexible way to expand and process the initial design space representation obtained from the architecture framework. The proposed approach is ultimately tested in a search and rescue case study, partly based on the operations of the Swedish Maritime Administration. The results show that it is possible to break down SoS needs in a consistent way and that ontology with description logic reasoning can be used to process the captured knowledge to both expand and reduce an available design space representation.

A novel design space concept for design of concrete foundation supporting chemical reactors

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Osama Bedair
Keyword(s):  
Design Space ◽  
Cost Savings ◽  
Space Representation ◽  
Chemical Reactors ◽  
Content Type ◽  
Gas Recovery ◽  
Wide Range ◽  
Numerical Finite Element ◽  
Novel Concept ◽  
Reactor Models

PurposeThis paper presents a novel concept for design of concrete support system for chemical reactors used in refineries and petrochemical plants. Graphical method is described that can be used to size the concrete base and piling system. Recommendations are also provided to optimize the parameters required for the design. The procedure is illustrated for design of two reactor models commonly used in gas recovery units.Design/methodology/approachDesign space representation for the foundation system is described for chemical reactors with variable heights. The key points of the design graph are extracted from the numerical finite element models. The reactor load is idealized at discrete points to transfer the loads to the piles. Bilateral spring system is used to model the soil restrains.FindingsThe graphical approach is economical and provides the design engineer the flexibility to select the foundation parameters from wide range of options.Practical implicationsThe concept presented in the paper can be utilized by engineers in the industry for design of chemical reactors. It must be noted that little guidelines are currently available in practice addressing the structural design aspects.Originality/valueA novel concept is presented in this paper based on significant industrial design experience of reactor supports. Using the described method leads to significant cost savings in material quantity and engineering time.

Capability Based Weapon System-of-Systems Evaluation Strategies Design Space and Exploratory Analysis

2014 ◽  
Vol 527 ◽  
pp. 306-310
Author(s):  
Zhi Fei Li ◽  
Zi Mo Li ◽  
Feng Yang ◽  
Yi Fan Zhu
Keyword(s):  
Design Space ◽  
Early Period ◽  
System Of Systems ◽  
Exploratory Analysis ◽  
Fractional Factorial ◽  
Weapon System ◽  
Agent Based ◽  
Simulation Tools ◽  
Evaluation Strategies ◽  
Equipment Acquisition

It is an urgently problem to be solved that how to test a weapon system-of-systems capabilities in a joint operational context. Firstly, based on the capability assessment of weapon system-of-systems, a procedure of weapon system-of-systems capabilities evaluation strategies design space is proposed. Secondly, supported by agent-based simulation tools, an exploratory analysis example is given which uses the fractional factorial design and stepwise regression fit. This paper makes a better try on the measures selected of the system-of-systems capabilities in the early period of weapon equipment acquisition.

Methods and Techniques of Effective Management of Complexity in Aviation

2020 ◽  
pp. 438-459
Author(s):  
Maksym Yastrub ◽  
Mario Boyero Pérez ◽  
Svetlana Kredentsar
Keyword(s):  
Traffic Management ◽  
Management System ◽  
Enterprise Architecture ◽  
Air Traffic Management ◽  
Holistic View ◽  
Architecture Framework ◽  
Modern Enterprise ◽  
Methods And Techniques ◽  
Architecture Frameworks ◽  
Traffic Management System

This chapter presents the use of enterprise architecture to manage the growing complexity in aviation. Any aviation organization or air traffic management system can be considered as a complex enterprise which involves different stakeholders and uses various systems to execute its business needs. The complexity of such an enterprise makes it quite challenging to introduce any change since it might have an impact on various stakeholders as well as on different systems inside of the enterprise. That is why there is a need for a technique to manage the enterprise and to anticipate, plan, and support the transformation of the enterprise to execute its strategy. This technique can be provided by enterprise architecture, a relatively new discipline that focuses on describing the enterprise current and future states as well as providing a holistic view of it. The authors describe the modern enterprise architecture frameworks and provide an example of an application of one of them (European ATM Architecture framework) to identify and manage changes in aviation.

scholarly journals Integration of Zachman Framework and TOGAF ADM on Academic Information Systems Modeling

2021 ◽  
Vol 5 (1) ◽  
pp. 72-85
Author(s):  
Abdul Fadlil ◽  
Imam Riadi ◽  
Azhar Basir
Keyword(s):  
Information System ◽  
Information Systems ◽  
System Modeling ◽  
Open Group ◽  
Systems Modeling ◽  
Advantages And Disadvantages ◽  
Architecture Framework ◽  
Architecture Frameworks ◽  
Zachman Framework ◽  
Academic Information

Zachman Framework (ZF) and The Open Group Architecture Framework (TOGAF) are Architecture Frameworks often used in Architecture Enterprise's implementation. Each side of the two architecture Frameworks has advantages and disadvantages. Sekolah Tinggi Manajemen Informatika dan Komputer Muhammadiyah Paguyangan Brebes (STMIK MPB) is a new university established on April 28, 2017; STMIK MPB as a new university has no plans in building an information system. The research will select the parts that exist in the ZF and TOGAF methodologies. The two methods will be combined and compiled to be applied to the Academic Information System modeling or blended methods. These research results are architectural blueprints that can be used as a reference in the development of academic information systems.

scholarly journals Climate change in the Indo-Pacific basin from mid- to late Holocene

2021 ◽  
Author(s):  
Fabrizio Falasca ◽  
Julien Crétat ◽  
Annalisa Bracco ◽  
Pascale Braconnot ◽  
Olivier Marti
Keyword(s):  
Climate Variability ◽  
State Space ◽  
Late Holocene ◽  
Southern Oscillation ◽  
Principal Component ◽  
Space Representation ◽  
Compact Representation ◽  
System Perspective ◽  
Gradual Shift ◽  
Mean State

Abstract Changes in climate mean state profoundly impact climate variability. Here, we quantify slow changes in the mean climate induced by the variations in the Earth’s orbit from mid- to late Holocene, and their feedback on the main modes of climate variability. We focus on the Indo-Pacific system and show that mid-Holocene conditions favored the dominance of an equatorial dipole mode in the Indian Ocean (IO), independent of the El Niño Southern Oscillation (ENSO) and different from the IO Dipole (IOD) observed today. Mean state changes induced a gradual shift to an IO basin mode that along with the IOD modulates most of the IO variance at present. The climate modes evolution and their connectivity changes are investigated over 6,000 years using a complex network methodology and principal component analysis. To characterize the nature of this transition, we explore the trajectory of the Indo-Pacific climate by accounting for its spatiotemporal and multivariable dependency. The full trajectory of the system is explored from a dynamical system perspective by constructing a state space representation. The manifold embedded in the 104 -dimensional state space provides a compact representation of the system evolution and points to a gradual shift of the basin of attractions in the tropics. This approach, together with a mean state analysis, reveals that a strengthening of the Walker circulation set the stage for a shift in modes in both basins.

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