title: Hierarchical modelling of manufacturing systems using discrete event systems and the conflict preorder

authors: Malik, Robi

subjects: Science & Technology

abstract: This paper introduces Hierarchical Interface-Based Supervisory Control using the Conflict Preorder and applies it to the design of two manufacturing systems models of practical scale. Hierarchical Interface-Based Supervisory Control decomposes a large system into subsystems linked to each other by interfaces, facilitating the design of complex systems and the re-use of components. By ensuring that each subsystem satisfies its interface consistency conditions locally, it can be ensured that the complete system is controllable and nonblocking. The interface consistency conditions proposed in this paper are based on the conflict preorder, providing increased flexibility over previous approaches. The framework requires only a small number of interface consistency conditions, and allows for the design of multi-level hierarchies that are provably controllable and nonblocking.

text: Hierarchical modelling of manufacturing systems using discrete event systems and the conflict preorder This paper introduces Hierarchical Interface-Based Supervisory Control using the Conflict Preorder and applies it to the design of two manufacturing systems models of practical scale. Hierarchical Interface-Based Supervisory Control decomposes a large system into subsystems linked to each other by interfaces, facilitating the design of complex systems and the re-use of components. By ensuring that each subsystem satisfies its interface consistency conditions locally, it can be ensured that the complete system is controllable and nonblocking. The interface consistency conditions proposed in this paper are based on the conflict preorder, providing increased flexibility over previous approaches. The framework requires only a small number of interface consistency conditions, and allows for the design of multi-level hierarchies that are provably controllable and nonblocking.

year: 2015-06-01

title: Lifelong science learning

authors: Barker, Miles

subjects: science learning

abstract: The author discusses the incorporation of lifelong learning in the study of science in New Zealand. He explains two preliminary thoughts related to the creation of a setting for lifelong learning in the field of science including the sustained enrichment necessary to enhance school science experiences of students. He also explores three major capabilities such as the understanding of the nature of science and engaging in socio-scientific issues that lifelong learning might entail.

text: Lifelong science learning The author discusses the incorporation of lifelong learning in the study of science in New Zealand. He explains two preliminary thoughts related to the creation of a setting for lifelong learning in the field of science including the sustained enrichment necessary to enhance school science experiences of students. He also explores three major capabilities such as the understanding of the nature of science and engaging in socio-scientific issues that lifelong learning might entail.

year: 2010

title: Te Kōtihitihi: Ngā Tuhinga Reo Māori, Putanga 1

authors: Ngāpō, Korohere

abstract: Koinei te katoa o te Putanga 1 o te puka hautaka, Te Kōtihitihi.

text: Te Kōtihitihi: Ngā Tuhinga Reo Māori, Putanga 1 Koinei te katoa o te Putanga 1 o te puka hautaka, Te Kōtihitihi.

year: 2011-04