Posts Tagged ‘high frequency’
August 8th, 2009 | 
Author: Having problems with aggressive dogs in the neighborhood? While some dogs are friendly enough to touch and play with and others nonchalant enough to ignore, there are some that are rather worrisome. Some dogs are untrained or not used to human presence. In some cases, you just might be in the wrong place at the wrong time. Thank goodness there’s the electronic dog chaser, a handy device that helps deter an attack from an aggressive dog. But just how effective is it?
How it works
The electronic dog chaser is a handheld device that was designed to be used on dogs, cats and a host of other feral animals. The device emits high frequency sounds, also known as ultrasonic waves.
Dogs’ hearing abilities are far superior than humans in that they are capable of sensing aurally certain high frequency sounds — sounds that no longer register with the human ear. That is why dogs can find certain sounds annoying that humans may not even be aware of.
Ultrasonic waves that come from the electronic dog chaser produces discomfort in dogs and other animals. As a result, they tend to shrink away from the source of the sound, stop in their tracks or even run away.
The high frequency waves emitted by the electronic dog chaser ranges from 20,000Hz to about 25,000Hz, way above the hearing range of the average human.
Is it effective?
The electronic dog chaser has been proven to be quite effective in stopping or deterring dog attacks. In fact, many people have chosen it as a humane way of protecting themselves from aggressive dogs and wild animals. It has also proven itself useful for dog training.
Is it safe?
The electronic dog chaser is a non-lethal device, both to dogs and humans. It will cause discomfort in dogs and is an excellent temporary tool to stop dog attacks.
Be careful, though. If you expect to encounter aggressive dogs, there are certain situations (albeit rare) where the electronic dog chaser may not be effective. It cannot, for example, work against deaf dogs. Since a hearing impaired dog cannot process the sounds, the ultrasonic waves coming from the gadget will not work their magic.
The electronic dog chaser also runs on batteries. Fresh batteries will assure you of constant protection, so it pays to ensure that you’re not walking around an unfamiliar neighborhood with a tool that doesn’t have sufficient power to prevent a wild animal attack.
The electronic dog chaser is one nifty device if you frequent neighborhoods disliked by postmen. Visit TBO-Tech.com for more information.
Article Source: Reasons Why the Electronic Dog Chaser is Effective
Why is space travel of today a big joke? For the same reason they will never come to a solution to solve global warming.
They can’t figure out how to stop this and are trying hard but will never get the problem solved. Results are to slow.
Consider while you are in space traveling at a high rate of speed. Many thousands of kilometers a second. Then ask yourself, what happens when a 1 gram piece of mass travelling towards you at several thousands of kilometers an hour. Would you really like this to happen to you? Think your space craft with it being built at a minimal cost by some contractor. You will wonder how much of an impact these model T’s will take.
Now ask yourself, How big are some and the majority of particles be traveling towards you? Could be fairly large. Do you think one will be able to detect all of these particles, with all the sophisticated systems they have today? Will one be able to get out of the way?
Now have you given thoughts about ever traveling out of this little solar system we are in. The systems for travel that are available today makes it impossible to ever in a millennium to ever reach these beautifully created heavenly bodies.
There is a way one will be able to travel to these far away places and have protection around a space craft. But not with anything like they are using today.
Ask how will that be done. There is an energy that is capable of doing that. This energy is capable of creating a very high frequency field of a highly strong magnetic field around the vessel that it contains.
When a rotating magnetic field encounters an object entering it’s field a field is set up in this object in opposition to the field that created it. What happens is the object will be deflected away from it’s path. It’s like having a home run hitter at the plate all the time.
Enough of this let’s get down to the facts, This energy is called constant magnetic acceleration. Unfortunately the educated have shall we say flunked this subject. Would anyone want to travel at close to or possibly beyond the speed of light? And do this at a cost of pennies. Think where one could go and how far.
Is this possible? How many will dispute this claim? Just imagine being able to travel to far away places where the average person can afford to go. Think this is a big joke? But the space travel of today will be gone. And today really only the extremely wealthy can go. But that’s not what the good lord had in mind.
This earth needs this C.M.A. energy. Would you like to help save our earth, having a hand with this research? Before it is to late. Reflecting back on space travel of today, One has to ask why are we spending so much money on a system that very little comes of it. Yes there is some good. We have improved the navigation systems of today, improved our ability to see into outer space farther then ever before. Among other things these are all good.
But to try to travel to far away planets with a snail space ship. When will these people wake up and realise they have put their ego ahead of reality. To many people want to make a vein statement they are doing this ahead of some one else. For what purpose, Possibly to have some money from the tax payers back pockets. You can be assured they got all the answers! But no results worth getting excited over.
David Chura is one of very few if not the only known research investigators in the field CMA energy, Dedicated who will stop global warming and learn how to stop high gas prices Then feel good and learn a little secret how to save our earth.
Article Source: Space travels a JOKE!
Thanks to advances in the technology used to manufacture them, wireless security cameras have come down considerably in price over the past few years. In addition, wireless technology has provided for easier and less costly installation. Wireless security cameras still cost more than their wired counterparts, but this difference in price can be easily overcome by savings in the cost of expensive video cable and its installation.
Most of today’s wireless security cameras operate in the 2.4GHz frequency range. These new high-frequency cameras transmit a clear signal which can pass through walls, ceilings and doors. This is the same frequency that is used by many cordless telephones and other devices such as wireless networks, so this needs to be considered when choosing wireless cameras for your location. In most cases, interference problems can be overcome by selecting different channels within the 2.4GHz band for your different wireless devices.
Installation of a wireless security camera is relatively easy. First, the device must be mounted in the area you want to keep an eye on. Then power must be run to the device, usually 12VDC for most cameras. At this point, the output of the wireless receiver (one for each camera) must be plugged into the display and/or recording device used to capture the images. Advances in technology have also made possible relatively inexpensive DVRs (Digital Video Recorders) and display monitors.
In most cases, you will want to record the output of the wireless security cameras. Display only will suffice if you have someone on guard who can keep an eye on the displays, but recording the images maintains a record of any activity of interest. Devices, called quads, are available which allow multiple cameras to be viewed on one display monitor. Most DVRs also include built-in quad capability.
A DVR can record the output of multiple wireless security cameras. Since the images are recorded on digital media, there are no tapes to wear out, and you can instantly view any portion of a video without having to fast-forward or rewind to the correct spot on a tape. Standalone DVRs are available at reasonable cost. Some are PC based, using the hard drive of the PC to store images and the monitor to display the images in real time. You can also buy a package which contains all of the necessary software and hardware to turn your existing PC into a sophisticated DVR and display device.
Wireless security cameras can greatly enhance the security of your home or business. It may be that you have thought about installing a wireless security camera system, but haven’t because you thought it would be too difficult or expensive. Now would be a good time to find out more about wireless security cameras.
For more detailed information about wireless security cameras, visit the Total Security Warehouse website at the following link: http://totalsecuritywarehouse.com – http://totalsecuritywarehouse.com.
Article Source: Wireless Security Cameras — Inexpensive and Easy to Install
The Nokia N95 supports WCDMA 2100, EGSM 900 and GSM networks. These networks are helpful for automatic switching between bands and modes. With the help of these networks, one can quickly connect to the whole world. This widget has 120 grams weight only. The size of the phone can be measured with dimensions of 99 x 53 x 21 mm. Through S60 user interface, the user can easily access all the functions of this gadget. It also has dedicated media keys and an active standby screen.
With 2.6 inches large screen, this widget supports up to 16 million colours. Its display screen has the high resolution of 240 x 320 pixels. An individual can view the crystal clear images and videos on this gadget. This phone has sufficient storage capacity to store numerous data in it. It has 160 MB internal memory and 64 MB SDRAM memory. With microSD card support, a person can increase the external memory up to 8 GB. The Nokia N95 also comes equipped with high speed technologies such as GPRS class 10, HSCSD and EDGE class 32 to transfer data to other devices at high frequency. This phone also supports a dual transfer mode that is useful for sending voice and data in the form of packets at the same time.
The mobile phone also comes loaded with 5.0 MP camera that supports the powerful Carl Zeiss optics lens, autofocus and flash. These features enables you to take high-quality pictures and images of your loved ones. An individual can also shoot the high-quality video clips with the help of Video camera. This camera phone gives the video clips at the rate of 30 frames per second. The CIF camera allows the user to view the picture of another person at the time of talking.
Nokia mobile phones are the most demanding devices because of their powerful battery. This gadget has talk-time of up to 6 hours and 30 minutes and standby time up to 220 hours. With the long-life battery, an individual can talk with other persons for a long time. This gadget also supports the standard Li-lon battery that comes with the capacity of 950 mAh. It has built-in handsfree that allows you to listen songs and music without using the headphone. The widget also supports Java MIDP 2.0 application that is used for supporting the Java applications. One can also download Java based applications and games with the help of Over-the-air (OTA) application.
This phone comes enhanced with A-GPS function that is used for getting information about the routes of the city. With the help of this feature, one can also download maps of up to 100 countries. The device also supports a WAP browser with xHTML and HTML languages. One can send and receive emails with the help of SMTP, POP3, IMAP4 and APOP protocols. It is also enriched with Predictive Text Input feature that supports all the major languages of Europe and Asia Pacific. Thus, Nokia N95 is the best device among the other Nokia mobile phones.
Alden Jerry is an author of Xpert4u Price Comparison Sites that provides the relevant information on various Games, electronics and mobile phones products. Nokia N95 8GB
Article Source: Nokia N95 : Empowered with Ultimate Imaging Features
The phenomenon of electromagnetic induction was first discovered by Michael Faraday in 1831, and it is evident that he realised at least a part of its future potential in the modern world. A contemporary politician asked him about the usefulness of the discovery; he answered ‘at present I do not know, but one day you will be able to put a tax on it.’
The earliest record of using electromagnetic technology to locate buried cables dates from around 1910. More portable locators were made over the next years and the Sharman Main Finder was just one example. The user instructions give a tinge of envy to anyone trying to trace gas pipes .. ..’just clip the generator to a gas bracket in the nearest house or onto a street lamp.’
American and German schools of design emerged during the years leading up to the Second World War. In North America roads were wide and wide cables hung on poles so the main requirement for a locator was to locate widely spaced buried pipes. The result was a simple, high frequency, low power and low cost locator.
In Germany, cables as well as pipes were buried under narrow streets, so elaborate low frequency and high power locators were developed that required considerable expertise to obtain satisfactory results.
Dr Gerhard Fisher of California designed the Metallascope, the first high performance buried pipe and cable locating set. His system made use of the latest scientific developments and his company exists today and still produces the M-scope, an up-to-date descendent of the original Metallascope.
One of the engineering sections of Bell Laboratories studied the problem of accurate location of newly buried cables and recognised that an antenna with twin sensing aerials would give more positive plan definition, and also measure the depth of a target cable. The subsequent design, called the Depthometer, was engineered and manufactured in 1964. It was another 12 years before the first commercial twin aerial antenna locator was made by the Electrolocation company in Bristol England.
The twin aerial system was found to have substantial advantages over single aerial locators. Twin sensing aerials combined the seemingly contradictory qualities of discrimination with sensitivity. For the first time it was possible to locate buried cables below an overhead power line and to sort out crowded utility services under a city street intersection.
The introduction of the twin aerial antenna coupled with miniaturised electronic circuitry coincided with a programme of extending and upgrading utility distribution systems. This growing demand and technical progress resulted in a series of advances and new features to make locating more certain and more simple. Some of these advances included:
” Combination of active and passive signal reception
” Multi-frequency locating sets enabling the user to select the most suitable frequency for each application
” Electronic depth measurement.
” Current measurement along the length of a pipe or cable to detect coating or insulation defects.
” Current direction recognition to verify the identity of a target line.
” Permanently installed signal transmitters to apply a signal tone to a telephone cable over distances up to 150km/100 miles.
Today, electromagnetic locators are the worldwide standard for locating buried pipes and cables. A number of specialised manufacturers offer a choice of locators ranging from simple equipment used to detect the presence of buried cables to sophisticated instruments for pinpointing, identifying and fault finding buried pipes and cables in the most complex situations.
Written by Select Surveys, one of the UK’s leading independent surveying companies specialising in using electromagnetic, CAT and ground penetrating radar equipment to detect underground cables and utilities.
Article Source: A History of Underground Electromagnetic Surveying
The mobile can boast of a top range camera with its latest multimedia features. It has a full touchscreen of 3.0 inches along with shades of 256 colours. This is a handset that has got an 8 megapixels camera with advanced devices like autofocus,video(VGA 30fps,QVGA up to 120 fps) xenon flash and a secondary VGA video call camera. All these multimedia features provides you multi-sensor experience like no other camera by giving you enhanced viewing ability and superior sound solutions.
Messaging is fun on this mobile. It has got modern all options like SMS, MMS, EMS and Email, which give you fast and easy transfer of information. What is more, browsing is ultimate fun and easy with this phone. The mobile is supported with WAP2.0/x HTML and HTML enabled browser which provides you a new experience
of accessing websites in a quick and easy way.
The LG KC910 is a perfect handset with 32-48 kbps GPRS, 3G HSDPA – 7.2 Mbps, Wi-Fi 802.11 b/g, Bluetooth v2.0 with A2DP. With the help of these technologies, one can enjoy fast and convenient transferring of data and these technologies are all what everybody look for, nowadays.
This handset has very advanced video features. It has the capacity of recording videos from 5 fps up to 120 fps, meaning that you can record in both fast as well as in slow motion. Not only this but the phone also play DivX and Xvid movies right out of the the box and you do not
need any kind of additional encoding. These unique features give this phone great recognition in the market.
In all, the LG KC910 is Dolby mobile phone. It provides rich and very soothing experience of vibrant audio along with powerful bass to improve your listening experiences. It comes with Sound Space for Headphones and High frequency Enhancer. Sound Space adds space and impact to headphone, which improves your listening and the High-Frequency Enhancer reinforces the frequencies when music and other contents are compressed.
Finally, this phone has been provided with Personalised Widgets Flash UI. It provides the option of customisable settings to the users, which means that any widget can be easily added by dragging it from the menu bar. The users can choose colours of their choices for an ideal screen experience.
Apart from this, LG KC910 is online embedded features and technologies give an instant access to information about things such as weather forecasts and other valuable online information. More interestingly, it comes with a very good memory that allows you huge storage options.
LG KC910 Alice Erin is an Expert Author. He has written many good quality articles on LG Viewty and LG Phones.
Article Source: LG KC910: Style was never so stylish