Reactive behavior is rapidly becoming a key feature of modern software systems in such diverse areas as ubiquitous computing, autonomic systems, and event-based supply chain management. In this paper we analyze the convergence of techniques from aspect oriented programming, active databases and asynchronous notification systems to form reactive middleware. We identify the common core of abstrac...

Distributed notification services allow consumers and publishers of notifications to interact with different notification services. However, such a distributed infrastructure makes it difficult to share notifications between consumers when consumers are allowed to specify Quality of Service levels. In this paper, we present a chained negotiation engine, enabling distributed notification service...

Event notification services are used in various applications such as digital libraries, stock tickers, traffic control, or facility management. However, to our knowledge, a common semantics of events in event notification services has not been defined so far. In this paper, we propose a parameterized event algebra which describes the semantics of composite events for event notification systems....

Incident detection systems have the potential of reducing the time between the occurrence of accidents and the notification of emergency medical services, called the accident notification time. Reductions in this time, in turn, may affect the numbers of fatalities. A statistical analysis is conducted to determine the quantitative relationship between fatalities and the accident notification tim...

The national notification data from 1952 to 1997 was examined in order to characterise hepatitis A virus (HAV) infection in Australia in the 1990s, and to determine whether currently available surveillance data are sufficient to inform disease control strategies and vaccination policies. Hepatitis A annual notification rates declined dramatically from a high of 123 notifications per 100,000 per...

INTRODUCTION The Western Australian Birth Defects Registry and the Western Australian Cerebral Palsy Register used multiple sources of voluntary notification without consent and have a high level of case ascertainment, but there were concerns over privacy and a call for statutory notification. OBJECTIVE To seek consumer consensus on whether notification to the registers should be statutory or...

Notification about work hazards is a legal requirement in advanced industrial countries, but workers have claimed, that in many cases, they do not receive enough information regarding risks, exposure, and medical problems. The recent professional literature on the subject has explored the ways in which notification is delivered without sufficiently considering the psychological incentives and b...

OBJECTIVE To examine the outcome of partner notification for HIV infection. DESIGN Retrospective analysis of medical, health adviser and counsellor records. SETTING Teaching hospital, Newcastle upon Tyne. PATIENTS All newly diagnosed cases of human immunodeficiency virus (HIV) infection and their sexual partners. MAIN OUTCOME MEASURES Attendance of contact at genitourinary medicine clin...

Disease surveillance systems require that data are complete and submitted on time so that effective prevention and control measures can be initiated promptly. Qatar is in the elimination phase of measles control. A retrospective review of records was conducted in Qatar to evaluate the timeliness of notification and completeness of measles surveillance data. All the notification and investigatio...

BACKGROUND Hepatitis C virus (HCV) testing and counselling have the potential to impact individual behaviour and transmission dynamics at the population level. Evidence of the impact of an HCV-positive status notification on injection risk reduction is limited. The objective of our study was to (1) assess drug and alcohol use and injection risk behaviours following notification; (2) to compare ...