Calligraphy and causation : two obstetric management cases - Hirst v Sydney South West Area Health and King v Western Sydney local health network

Two recent decisions of the Supreme Court of New South Wales in the context of obstetric management have highlighted firstly, the importance of keeping legible, accurate and detailed medical records; and secondly, the challenges faced by those seeking to establish causation, particularly where epidemiological evidence is relied upon...

Integrating voice and data on SALAN: an experimental local area network

This paper is concerned with the integration of voice and data on an experimental local area network used by the School of Automation, of the Indian Institute of Science. SALAN (School of Automation Local Area Network) consists of a number of microprocessor-based communication nodes linked to a shared coaxial cable transmission medium. The communication nodes handle the various low-level functions associated with computer communication, and interface user data equipment to the network. SALAN at present provides a file transfer facility between an Intel Series III microcomputer development system and a Texas Instruments Model 990/4 microcomputer system. Further, a packet voice communication system has also been implemented on SALAN. The various aspects of the design and implementation of the above two utilities are discussed.

Salan: A microprocessor-based medium speed experimental local area network

In this paper the implementation and application of a microprocessor-based medium speed experimental local area network using a coaxial cable transmission medium are dealt with. A separate unidirectional control wire has been used in order to provide a collision-free and fair medium access arbitration. As an application of the network, the design of a packet voice communication system is discussed.

The use of a biased heuristic by a genetic algorithm applied to the design of multipoint connections in a local access network

This paper presents a genetic algorithm for finding a constrained minimum spanning tree. The problem is of relevance in the design of minimum cost communication networks, where there is a need to connect all the terminals at a user site to a terminal concentrator in a multipoint (tree) configuration, while ensuring that link capacity constraints are not violated. The approach used maintains a distinction between genotype and phenotype, which produces superior results to those found using a direct representation in a previous study.

Genetic algorithms for local controller network construction

Local Controller Networks (LCNs) provide nonlinear control by interpolating between a set of locally valid, subcontrollers covering the operating range of the plant. Constructing such networks typically requires knowledge of valid local models. This paper describes a new genetic learning approach to the construction of LCNs directly from the dynamic equations of the plant, or from modelling data. The advantage is that a priori knowledge about valid local models is not needed. In addition to allowing simultaneous optimisation of both the controller and validation function parameters, the approach aids transparency by ensuring that each local controller acts independently of the rest at its operating point. It thus is valuable for simultaneous design of the LCNs and identification of the operating regimes of an unknown plant. Application results from a highly nonlinear pH neutralisation process and its associated neural network representation are utilised to illustrate these issues.

An Autopilot Based on a Local Control Network Design for an Unmanned Surface Vehicle

Over recent years, a number of marine autopilots designed using linear techniques have underperformed owing to their inability to cope with nonlinear vessel dynamics. To this end, a new design framework for the development of nonlinear autopilots is proposed herein. Local control networks (LCNs) can be used in the design of nonlinear control systems. In this paper, a LCN approach is taken in the design of a nonlinear autopilot for controlling the nonlinear yaw dynamics of an unmanned surface vehicle known as Springer. It is considered the approach is the first of its kind to be used in marine control systems design. Simulation results are presented and the performance of the nonlinear autopilot is compared with that of an existing Springer linear quadratic Gaussian (LQG) autopilot using standard system performance criteria. From the results it can be concluded the LCN autopilot out performed that based on LQG techniques in terms of the selected criteria. Also it provided more energy saving control strategies and would thereby increase operational duration times for the vehicle during real-time missions.

Telecommunication services in Trinidad and Tobago: description of the local data network

Includes bibliography

ILLINET--a 32 Mbits/sec. local-area network /

"October, 1980."

La gouvernance nodale de la sécurité locale

Le présent travail de recherche se propose d’analyser les dispositifs de gouvernance nodale de la sécurité locale en France, alors que le paradigme a vu le jour et s’est développé dans les pays anglo-saxons fortement décentralisés. C’est qu’en France les dispositifs de gouvernance nodale s’apparentent bien plus à un dialogue entre central et local qu’entre secteur public et privé. La recherche identifie ainsi les caractéristiques de la gouvernance nodale au cœur des dispositifs partenariaux de la sécurité locale, supportés par le Contrat Local de Sécurité (CLS), le Conseil Local de Sécurité et de Prévention de la Délinquance (CLSPD) ou encore le Groupe Local de Traitement de la Délinquance (GLTD). La recherche identifie ainsi les stratégies de décentrage de l’État et de transfert de la production de sécurité vers une diversité d’acteurs locaux, dont les maires et les services municipaux. Une diversité de politiques publiques locales de sécurité de pertinences différentes voit alors le jour. Le premier enseignement de cette recherche est l’importance du rôle joué par le node super-structurel, que nous appelons super-node et qui regroupe le maire ou l’élu local à la sécurité, le responsable de la police d’État, celui de la police municipale et le représentant de l’État. Il apparaît que dans le dispositif de gouvernance nodale, ce groupe informel génère la dynamique collective qui permet de regrouper, tant les producteurs que les consommateurs de sécurité locale gravitant au sein du réseau local de sécurité. La quarantaine d’entrevues qualitatives permet également d’identifier que la Justice, productrice de sécurité comme peut l’être aussi la sécurité privée ou la médiation sociale, apparaît plus distante que ce que pouvait laisser penser l’étude des textes réglementaires organisant le partenariat. Les bailleurs sociaux, les transporteurs et l’Éducation nationale apparaissent clairement comme des acteurs importants, mais périphériques de sécurité, en intégrant cette « famille élargie » de la sécurité locale. Le deuxième enseignement est relatif au fonctionnement même du dispositif nodal ainsi que du super-node, la recherche permettant d’identifier les ressources mutualisées par l’ensemble des nodes. Cela permet également d’identifier les mécanismes de répartition des tâches entre les différents acteurs et plus particulièrement entre les deux organisations policières d’État et municipale, travaillant autant en compétition, qu’en complémentarité. Cette recherche explore également le rôle joué par l’information dans le fonctionnement du super-node ainsi que l’importance de la confiance dans les relations interpersonnelles des représentants des nodes au sein du super-node. Enfin, l’étude permet également de mettre en perspective les limites du dispositif actuel de gouvernance nodale : le défaut avéré d’outils performants permettant d’informer convenablement le super-node quant aux phénomènes de violence ainsi que d’évaluer l’efficience du dispositif. Cela permet également de questionner l’autonomie des dispositifs de gouvernance nodale, la confiance pouvant ouvrir à la déviance et la collégialité au défaut de la traçabilité de la responsabilité. La fracture avec la société civile apparaît clairement et ne facilite pas le contrôle sur un mode de production de sécurité qui se développe en parallèle des dispositifs traditionnels de démocratie locale.

Network security metrics and performance for healthcare systems management

While enhanced cybersecurity options, mainly based around cryptographic functions, are needed overall speed and performance of a healthcare network may take priority in many circumstances. As such the overall security and performance metrics of those cryptographic functions in their embedded context needs to be understood. Understanding those metrics has been the main aim of this research activity. This research reports on an implementation of one network security technology, Internet Protocol Security (IPSec), to assess security performance. This research simulates sensitive healthcare information being transferred over networks, and then measures data delivery times with selected security parameters for various communication scenarios on Linux-based and Windows-based systems. Based on our test results, this research has revealed a number of network security metrics that need to be considered when designing and managing network security for healthcare-specific or non-healthcare-specific systems from security, performance and manageability perspectives. This research proposes practical recommendations based on the test results for the effective selection of network security controls to achieve an appropriate balance between network security and performance