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Gill and Spriggs did a Cost effectiveness analysis CEA of CCTV in crime prevention that showed little monetary saving with the installation of CCTV as most of the crimes prevented resulted in little monetary loss. Critics however noted that benefits of non monetary value cannot be captured in a traditional Cost Effectiveness Analysis and were omitted from their study. A 2008 Report by UK Police Chiefs concluded that only 3% of crimes were solved by CCTV. In London, a Metropolitan Police report showed that in 2008 only one crime was solved per 1000 cameras. In some cases CCTV cameras have become a target of attacks themselves. In the United States, Britain, Australia and New Zealand, CCTV is widely used in schools due to its success in preventing bullying, vandalism, monitoring visitors and maintaining a record of evidence in the event of a crime. There are some restrictions on installation, with cameras not being installed in an area where there is a "reasonable expectation of privacy", such as bathrooms, gym locker areas and private offices unless consent by the office occupant is given. Cameras are generally acceptable in hallways, parking lots, front offices where students, employees, and parents come and go, gymnasiums, cafeterias, supply rooms and classrooms. The installation of cameras in classrooms may be objected to by some teachers. There were an estimated 30 million surveillance cameras in the United States in 2011. Video surveillance has been common in the United States since the 1990s; for example, one manufacturer reported net earnings of $120 million in 1995.

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01.14.2007 | 34 Comments

One question—why the app name change?!?DIY CCTV is really boring branding TBH. One more thing—there needs to be a way to turn of “phone is not charging” warnings. I am getting them repeatedly and all of them are not necessary. I need one and then I need another when the battery gets to 50 another at 20 and maybe start to nag me at 5%. But there is no reason to bug me every minute or so when I know the phone is plugged in and I am at work. Plus it usually stops charging until the battery level actually drops. Then it starts charging again. Hi, Thanks for reaching out to Alfred!Motion Detection Reminder is not available for iOS devices yet. Our engineering team is doing their best. Please continue to support Alfred and stay tuned!We truly appreciate your feedback. Would you like to let us know if you have a better idea in our app name?If you want, please contact us via Facebook: eetAlfredAs for the battery notification, we will take your advice into consideration.

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01.14.2007 | 16 Comments

The Kidde Smoke Alarm is another battery operated fire alarms system found in different parts of the world. With its high purchasing rate, there’s no doubt in our minds that this unit is a spectacular creation with a stellar performance wherever it is used. The Kidde i9050 provides continuous protection to you and your devices like every other battery powered unit. It uses a 9 volt battery for its operations; thus, you will not need to think of replacing your battery anytime soon. The Kidde smoke alarm battery uses the ionization sensing technology to detect all fire particles invisible to the naked eye, and this is done at a rate faster than that of the alarm system that uses the photoelectric sensors. To indicate that your alarm is receiving power, the Kidde smoke detector has a led that flashes red. This basic sensor unit from Kidde delivers early warning signals to you and your family members whenever there a potential danger. It is straightforward and easy to install, with a test button responsible for the verification of your device’s battery functions, electronic circuitry, and its horn, to ensure that they are all operating as they should. The tamper resist feature is also used by the i9050 smoke detector to deter tampering and theft from intruders. You can place this device anywhere within your living area without any issue. If you ever require something basic yet sturdy and reliable, the Kidde i9050 is your best bet.