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Security Cameras

We get a lot of questions about WiFi security cameras and doorbell cams being used as a burglar deterrent. Security is about layers and every little bit helps, but a common misconception is that there is a single silver bullet for all scenarios. That is just not true. In fact, no matter how complex your security system is there remains the possibility of break-ins and home instrusion. The best you can do is be rational, smart and live within your budget to protect your home. After all, we can not all have private security guards wandering our property. It's important to put in place security layers that work for you personally. So let's think about security cameras for a moment. First of all, not everyone is comfortable with the idea of having a camera streaming video of their home and family to the internet, especially when even folks like Apple and Yahoo can be hacked as we've seen recently. Then there is the question of budget. While there are expensive security camera systems available that include their own local recording devices, today most prefer recording to occur in the cloud (that is, your video footage is stored on a remote server). These are less expensive devices up-front, but they do require a monthly fee which can certainly add up over time. Either way, companies are going to make money off of the video footage whether your pay for it up front with your own recorder or incrementally pay a service fee for video to be stored in the cloud. Some security system installers will even go so far as to waive the cost of the cameras entirely, but then charge a higher monthly fee. This is a classic sales tactic that can be quite tantalizing depending on your budget.A product becoming more popular recently is the doorbell camera. The idea is that when someone rings your doorbell you can answer on your smart-phone and pretend like you are at home. Since we know burglars prefer unoccupied homes, a burglar would be less likely to break-in to a home that has a doorbell cam. There are a few things to keep in mind though when considering this approach. First of all, the burglar needs to ring the doorbell or at least walk up to the door for you to receive an alert. If the burglar approaches a window or another door without the doorbell cam then you are out of luck. Also, even if they do approach the front door where you have your camera located, you need to be immediately available to answer the notification that you receive. If you are on an airplane or in an important meeting then you are out of luck again. Finally, even if you are available and answer the phone, if it's at night your attempt at pretending to be home might not be very convincing if your home is pitch black. In this situation, a doorbell cam might work best in tandem with security lights such as BeON (which also responds to the doorbell) to make it appear that you are at home.Remember, when considering your preferred security system make sure you choose options that work for you, because everyone is different. With security cameras specifically, it's important to consider your privacy, your budget and your regular availability to monitor your own home. If you can check those boxes, then a security camera might be right for you

Security  Cameras 1

Can't remember the name of this music video about a bunch of hipsters. Can anyone please help?

is it Rusted Roots?

How do I watch a video that I have on my iPhone on my TV?

It's the cable. You need to buy a proprietary cable from Apple. Be careful not to get the old iPod TV out cable, called "iPod AV Cable," because it wo not work with your iPhone. You need either the "Apple Composite AV Cable" or the "Apple Component AV Cable." Composite cables have the red, yellow, and white end and component cables have red, green, and blue. Why can not you just use a cheaper brand of red, yellow, and white composite cables? From what I've read it is because Apple includes a small chip in their versions to prevent digital copying and the iPhone wo not work with anything less. You might find my source link useful. By the way, I've used the "Apple Composite AV Cable" to watch a couple of movies from my iPhone on my TV, and the quality is pretty good.

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Problems of Phased Array Ground Penetrating Radar Detection System
Although GPR has been widely used in hydrology, engineering, environment and other fields, many basic theoretical and technical problems have not been fundamentally solved, so the real advantages of GPR have not been brought into full play.The main problems existing in GPR technology include:1) The detection depth is shallow, and the contradiction between detection depth and resolution cannot be overcome. Increasing detection depth means sacrificing detection resolution;2) Multiple spread and other clutter jamming are serious, and there has been no good elimination method, which exists in radars at home and abroad;3) The influence of medium unevenness is great and can not be eliminated, resulting in difficulty in obtaining necessary velocity data;4) The data collection method of single sending and single receiving can provide limited information for post-processing and interpretation.The above problems are fatal defects for GPR. Although many geophysicists, electromagnetic experts and geophysical workers have done a lot of research and improvement on radar antenna design, signal processing and underground target imaging, these works are only partial modifications to the existing GPR system. In order to develop GPR technology, we must update our ideas and solve the problems from the fundamental principle.In view of this situation, experts proposed to develop a new GPR system - phased array GPR detection system in 1999.The basic research idea is to replace the current monopole radar antenna with the phased array radar antenna by using the relatively mature military phased array radar technology. Its purpose is to gather the electromagnetic wave into a narrow beam to transmit underground (or detection object) through the phased array technology, and receive the radar echo signal reflected by the target by using the multi-channel acquisition technology, The advanced data processing is carried out, and finally the three-dimensional image of the internal structure of the detection object is given.Development prospect of ground penetrating radar technologyIt is worth noting that at present, similar products have appeared in the market, such as RIS antenna array series of a company, but these products simply combine multiple monopole antennas into array antennas, which is essentially different from the idea of phased array ground penetrating radar.Because the phased array radar converges the electromagnetic wave into a narrow beam by controlling the phase delay of each channel, the energy is concentrated and the wave front diffusion is small. Therefore, the detection depth of the phased array radar is much larger under the condition of the same frequency and transmission power; On the contrary, under the same detection depth, phased array radar can improve the transmission power, so its resolution is much higher than the existing radar. In addition, since the spherical wave transmission is changed to beam transmission, the influence of medium heterogeneity is much smaller.Secondly, the phased array radar works in a continuous scanning mode and can scan in multiple directions. Therefore, the amount of information is much larger than that of the existing ground penetrating radar. For some special detection work, such as the quality detection of embankment cut-off wall, its role is unmatched by the existing ground penetrating radar (monopole antenna radar can not detect the joints, forks and other defects of embankment cut-off wall at all).Because phased array radar is a multi-channel received signal, multi-channel superposition can be carried out, just like the multiple coverage technology of reflection seismic exploration. Therefore, multiple interference can be greatly eliminated, which is difficult for existing radars. The antenna of high frequency (600mhz-1ghz) phased array ground penetrating radar can be made smaller, and its advantages are unmatched by the existing ground penetrating radar in shallow detection.At present, the system prototype has been completed. The carrier free pulse working system with center frequency of 900MHz is adopted, and the transmitting and receiving antennas are separated. 16 (4 × 4) Transmit channel forming, beam aggregation and scanning 16 (4) × 4) The channel receives the echo, and the optional scanning angles are - 36 °, - 24 °, - 12 °, 0 °, 12 °, 24 ° and 36 °.The software part of the system has rich data processing functions. The main conventional processing includes filtering, gain adjustment, static and dynamic correction, deconvolution, complex signal analysis, time-frequency analysis, etc., and multi-channel data processing, such as velocity analysis, superposition technology, coherence analysis technology, array signal processing, etc. And weak signal extraction, target automatic recognition and inversion interpretation under various clutter interference. A large number of field experiments on concrete detection in Yichang Three Gorges dam are carried out. The experimental results show that the spotlight scanning function of phased array radar has been realized, the penetration depth is greater than 1.5m and the resolution is higher than that of ordinary radar.Editing: hfy
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