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It was seen as a cheaper way to deter crime compared to increasing the size of the police departments. Some businesses as well, especially those that were prone to theft, began to use video surveillance. From the mid 1990s on, police departments across the country installed an increasing number of cameras in various public spaces including housing projects, schools and public parks departments. CCTV later became common in banks and stores to discourage theft, by recording evidence of criminal activity. In 1998, 3,000 CCTV systems were in use in New York City. The studies included in the meta analysis used quasi experimental evaluation designs that involve before and after measures of crime in experimental and control areas. However, several researchers have pointed to methodological problems associated with this research literature. First, researchers have argued that the British car park studies included in the meta analysis cannot accurately control for the fact that CCTV was introduced simultaneously with a range of other security related measures. Second, some have noted that, in many of the studies, there may be issues with selection bias since the introduction of CCTV was potentially endogenous to previous crime trends. In particular, the estimated effects may be biased if CCTV is introduced in response to crime trends. It has been argued that problems of selection bias and endogeneity can be addressed by stronger research designs such as randomized controlled trials and natural experiments.

Posted March, 2011 by Admin

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To do this, we connected each camera to our Wi Fi network along with a video streaming service and a smartphone. If a camera had connection problems, while the other devices and the router still worked, we deducted points accordingly. Other Things to Consider When Buying a Security Camera Video Storage: Local or Cloud?There are two kinds of storage, local and cloud, neither of which had any effect on our scoring because it boils down to personal preference. The cameras with local storage in our review use micro SD memory cards to save video footage. This lets you access your video without subscription fees, though you might need extra memory cards or to write over older footage if you plan to keep your camera recording at all times. Cloud storage holds more video than local storage, but there are often subscription fees. You typically don't need a subscription to view a live feed. However, if you can't reach the company's video servers, you can't access the recordings. On the other hand, cloud storage is easier to use than local and is more likely to record everything the camera sees. The Y cam Indoor HDS is the only camera in our review with free cloud storage. Field of ViewIf you choose a camera with a very wide field of view, at least 160 degrees, you can expect to see every part of the room in front of the camera.

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Posted February, 2011 by Admin

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