IDS can play a vital role in the overall security infrastructure, as one last defence against attacks after secure network architecture design, secure program design and firewalls [1]. Although IDS technology has become an essential part of corporate network architecture, the art of detecting intrusions is still far from perfect. A significant problem is that of false alarms, which correspond t...

The false alarm rate (FAR) measures the fraction of forecasted events that did not occur, and it remains one of the key metrics for verifying National Weather Service (NWS) weather warnings. The national FAR for tornado warnings in 2003 was 0.76, indicating that only one in four tornado warnings was verified. The NWS’s goal for 2010 is to reduce this value to 0.70. Conventional wisdom is that f...

Alarm systems play an important role in industry to notify operators of abnormal or fault situations. In real industrial plants, however, a majority of nuisance alarm signals, including false alarms and missed alarms, interfere with operators' judgment. The technique of delay-timers, a common means to reduce both false alarm rate (FAR) and missed alarm rate (MAR), is widely performed, yet it su...

Chemical process variables are always driven by random noise and disturbances. The closed-loop control yields process measurements that are auto & cross correlated. The influence of auto & cross correlations on statistical process control (SPC) is investigated in detail. It is revealed both auto and cross correlations among the variables will cause unexpected false alarms. Dynamic PCA and ARMA-...

Previous research demonstrates that tufted capuchin monkeys use terrestrial predator alarm calls in a functionally deceptive manner to distract conspecifics when feeding on contestable resources, although the success of this tactic is limited because listeners frequently ignore these calls when given in such situations. While this decreased response rate is suggestive of a counterstrategy to de...

OBJECTIVE To compare rates of nuisance alarms and disconnection between ionization and photoelectric smoke alarms. DESIGN A prospective cohort study. SETTING Four Inupiat Eskimo villages in the Northwest Arctic Borough region of Alaska, 48 km (30 mi) above the Arctic Circle. SUBJECTS Households in 4 communities with similar populations, number of homes, mean income, size of household, and...

M. B. Miller and G. L. Wolford (1999) make two contributions. First, they add conditions to the basic Roediger-McDermott (1995) procedure and find that critical items are recalled and recognized more often if they are presented in the list than if they are not presented. These results agree with our own, which are briefly reviewed. Second, they apply signal detection theory to the paradigm and ...

In this paper, the average probability of the symbol error rate (SER) and throughput are studied in the presence of joint spectrum sensing and data transmission in a cognitive relay network, which is in the environment of an optimal power allocation strategy. In this investigation, the main component in calculating the secondary throughput is the inclusion of the spatial false alarms, in additi...

INTRODUCTION A high rate of false arrhythmia alarms in the intensive care unit (ICU) leads to alarm fatigue, the condition of desensitization and potentially inappropriate silencing of alarms due to frequent invalid and nonactionable alarms, often referred to as false alarms. OBJECTIVE The aim of this study was to identify patient characteristics, such as gender, age, body mass index, and dia...