A review of connection admission control algorithms for ATM networks

The emergence of high-speed networks such as those with ATM integrates large numbers of services with a wide range of characteristics. Admission control is a prime instrument for controlling congestion in the network. As part of connection services to an ATM system, the Connection Admission Control (CAC) algorithm decides if another call or connection can be admitted to the Broadband Network. The main task of the CAC is to ensure that the broadband resources will not saturate or overflow within a very small probability. It limits the connections and guarantees Quality of Service for the new connection. The algorithm for connection admission is crucial in determining bandwidth utilisation efficiency. With statistical multiplexing more calls can be allocated on a network link, while still maintaining the Quality of Service specified by the connection with traffic parameters and type of service. A number of algorithms for admission control for Broadband Services with ATM Networks are described and compared for performance under different traffic loads. There is a general description of the ATM Network as an introduction. Issues to do with source distributions and traffic models are explored in Chapter 2. Chapter 3 provides an extensive presentation of the CAC algorithms for ATM Broadband Networks. The ideas about the Effective Bandwidth are reviewed in Chapter 4, and a different approach to admission control using online measurement is presented in Chapter 5. Chapter 6 has the numerical evaluation of four of the key algorithms, with simulations. Finally Chapter 7 has conclusions of the findings and explores some possibilities for further work

The Transposition of the European Information and Consultation Directive in Ireland

In this report we examine a range of employee information and consultation mechanisms in 15 organisations in the Republic of Ireland. The research was conducted specifically in relation to the European Employee Information and Consultation Directive. While we note that many managerial respondents identified a positive link between employee consultation and organisational performance, the efficacy and interpretations of how these mechanisms operate in practice differed quite substantially according to employees. The evidence suggests that regulations contained in the European Directive provide the opportunities for more effective employee voice systems and the platform to extend representational rights at workplace level.non-peer-reviewe

Conceptualising the dynamics of employee information and consultation: evidence from the Republic of Ireland

The debate concerning the emerging regulatory environment for employee voice continues apace, in particular the requirements to inform and consult employees as a result of the European Employee Information and Consultation Directive. This article examines the processes used to inform and consult employees across 15 case studies in the Republic of Ireland. It evaluates different voice arrangements using a conceptual framework that seeks to capture the dynamics of different employee voice schemes across union and non-union companies. The findings suggest that participation is more robust when the channels for information and consultation accommodate both conflictual and cooperative processes. It is shown that robust forms of participation are more likely through processes that facilitate independent representation. The evidence also shows that some employers may devise their own counterbalancing forms of (pseudo) consultation, in an attempt to minimise the impact of regulatory rights for employee voice.peer-reviewe

Conceptualising the dynamics of employee information and consultation: evidence from the Republic of Ireland

The debate concerning the emerging regulatory environment for employee voice continues apace, in particular the requirements to inform and consult employees as a result of the European Employee Information and Consultation Directive. This article examines the processes used to inform and consult employees across 15 case studies in the Republic of Ireland. It evaluates different voice arrangements using a conceptual framework that seeks to capture the dynamics of different employee voice schemes across union and non-union companies. The findings suggest that participation is more robust when the channels for information and consultation accommodate both conflictual and cooperative processes. It is shown that robust forms of participation are more likely through processes that facilitate independent representation. The evidence also shows that some employers may devise their own counterbalancing forms of (pseudo) consultation, in an attempt to minimise the impact of regulatory rights for employee voice

The Transposition of the European Information and Consultation Directive in Ireland

In this report we examine a range of employee information and consultation mechanisms in 15 organisations in the Republic of Ireland. The research was conducted specifically in relation to the European Employee Information and Consultation Directive. While we note that many managerial respondents identified a positive link between employee consultation and organisational performance, the efficacy and interpretations of how these mechanisms operate in practice differed quite substantially according to employees. The evidence suggests that regulations contained in the European Directive provide the opportunities for more effective employee voice systems and the platform to extend representational rights at workplace level

An analysis of general practitioners’ perspectives on patient safety incidents using critical incident technique interviews

Background General practitioners report difficulty in knowing how to improve patient safety. Objectives To analyse general practitioners’ perspectives of contributing factors to patient safety incidents by collecting accounts of incidents, identifying the contributory factors to these incidents, assessing the impact and likelihood of occurrence of these incidents and examining whether certain categories of contributory factors were associated with the occurrence of high-risk incidents. Methods Critical incident technique interviews were carried out with 30 general practitioners in Ireland about a patient safety incident they had experienced. The Yorkshire Contributory Factors Framework was used to classify the contributory factors to incidents. Seven subject matter experts rated the impact and likelihood of occurrence of each incident. Results A total of 26 interviews were analysed. Almost two-thirds of the patient safety incidents were rated as having a major-to-extreme impact on the patient, and over a third were judged as having at least a bimonthly likelihood of occurrence. The most commonly described active failures were ‘Medication Error’ (34.6%) and ‘Diagnostic Error’ (30.8%). ‘Situational Domain’ was identified as a contributory domain in all patient safety incidents. ‘Communication’ breakdown at both practice and other healthcare-provider interfaces (69.2%) was also a commonly cited contributory factor. There were no significant differences in the levels of risk associated with the contributory factors. Conclusions Critical incident technique interviews support the identification of contributory factors to patient safety incidents. There is a need to explore the use of the resulting data for quality and safety improvement in general practice.This work was supported through funding from the Irish Health Services Executive and the Irish College of General Practitioners.peer-reviewe