1. How does a false positive alarm differ from a false negative one? From a security perspective‚ which is least desirable? A false positive attack is where the system IDPS was alarmed but no attack ever occurred. The false negative is where an actual attack occurs and the IDPS isn’t alarmed at all. The least desirable would definitely be the false negative‚ if an attack does occur and the IDPS doesn’t even alarm well what’s the point in even having it if it isn’t going to alarm. 2. What is
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Automatic alerts and/or alarms are a system that converts information on the progress of a monitored process or the condition of a monitored system into a signal suitable for human perception. Generally light or sound signals are used‚ for example‚ the flashing of a lamp‚ the ringing of a bell‚ or the sounding of a siren. Use of alarms has made a significant impact on nursing as we know it‚ by alerting clinicians that something wrong with patients or alarming nurses that something is in need of our
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Mumbai-400058‚ India‚ ekta vira@ymail.com Abstract Most of the smoke alarms available in the market use one or another kind of smoke sensor which increases the cost and also require complicated interfacing circuitry around it. But this smoke alarm circuit uses readily available photon-coupled interrupter module as smoke detector. The functioning of this smoke alarm is to continuously detect smoke and automatically activate the alarm in case of dense smoke. Loud sound is heard continuously indicating
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Infrared security alarm Introduction: Not so long ago an alarm was a fairly rare sight‚ however now almost every house has an alarm of some kind. One common kind of security system is an infrared home security system. These are so popular because they are easy to install without having to drill holes and lay cable infrared radiation is invisible to the human eye but can be detected by electronic devices designed for such a purpose. The sensors are set at the door or some supervised
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Smoke Detectors A smoke detector is a device that detects smoke and prevents fire. Smoke detectors were used in many houses in North America and it is important safety devices for homes. Smoke detectors are cheap and it gives alarm of any warning when it rise a high temperature that was produced by a fire this is because smoke detectors can detect the combustion gases from a small flame. In the article‚ a woman resident of the Silverpuff apartment were seriously injure of a fire because
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1Intruder Alarm 6 Figure 2 Diode 7 Figure 3 Resistor 8 Figure 4IR LED 10 Figure 5 LED 11 Figure 6LM 324 13 Figure 7 Pin diagram 14 Figure 8 Transistor 16 Figure 9 SCR C106MG 18 Figure 10 9V Battery 20 1Introduction Burglar alarm systems/Intruder alarm systems monitor the designated area or areas to detect the presence or suspicious elements and plays a crucial role in theft protection. It is one of the most reliable means to secure a house or a work place. The intruder alarm system consists
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present or more likely to respond that a stimulus is not present. Bias is independent of sensitivity. For example‚ if there is a penalty for either false alarms or misses‚ this may influence bias. If the stimulus is a bomber‚ then a miss (failing to detect the plane) may increase deaths‚ so a liberal bias is likely. In contrast‚ crying wolf (a false alarm) too often may make people less likely to respond‚ grounds for a conservative bias.”(www.wikipedia.org) Of
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C H A P T E R 2 Alarm Troubleshooting Note The terms "Unidirectional Path Switched Ring" and "UPSR" may appear in Cisco literature. These terms do not refer to using Cisco ONS 15xxx products in a unidirectional path switched ring configuration. Rather‚ these terms‚ as well as "Path Protected Mesh Network" and "PPMN‚" refer generally to Cisco’s path protection feature‚ which may be used in any topological network configuration. Cisco does not recommend using its path protection feature
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arms and space enough to stretch my legs out on the warm maple wood floor. I told you why the history lesson was atrocious but now I need to tell you how it got even worse. Exactly 20 minutes after the lesson started the fire alarm was heard. The drum told us to ignore the alarm
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including: FIRES Regular testing of the fire alarms take place every six weeks at the School. The log book is kept by the business manager‚ this is available to any visiting fire officer. Fire instructions are clearly posted in all classrooms‚ offices and corridors. Also emergency exits are clearly signed. There are always at least 2 fire exits in each classroom. In the event of raising he alarm the glass will need to be broken in one of the many alarms allocated around the school. It is the
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