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Nevertheless, during the 1980s video surveillance began to spread across the country specifically targeting public areas. 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.

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01.14.2007 | 34 Comments

3. Even though there are some serious competitors in the video doorbell arena, I found some new developments within existing RING devices that have turned the tide back in RING’s favor as the first line of defense for your home. If you know anything about me, you’ll definitely know that I test out a lot of security cameras on and inside my very own home every few months or so. I have a need to know what is the best solution for my clients when it comes to unique coverage areas and the type of security cameras that can capture faces and action and there’s one thing I absolutely agree with the founder of RING. com, it’s that the front door entrance is the most important area to cover, hands down. If you were only getting one security video camera for your home, a video doorbell should be that one camera.

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01.14.2007 | 16 Comments

Do not install smoke and carbon dioxide detector in breezy and ventilated areas like in front of electric fans, air conditioners, windows and doors. They may pick up smoke that originated in other places or the fresh air might obscure the reading, preventing the device from setting off when it should. Install them on a high wall or in the ceiling because smoke and fire rises. What if you have a big house and there’s a fire starting somewhere in the basement and you’re asleep in your bedroom on the third floor?Fortunately photoelectric smoke detectors can be interconnected, meaning if a smoke detector sets off in the basement, all smoke detectors in the residence would alarm. This is effective in alerting the entire family. Installation and wiring, however, requires supervision.